Apple Inc. v. Samsung Electronics Co. Ltd. et al

Filing 662

EXHIBITS re #660 Administrative Motion to File Under Seal Apple Inc.'s Notice of Motion and Motion for Partial Summary Judgment Exhibits to Mueller Declaration ISO Apple's Motion for Partial Summary Judgment [660-9] filed byApple Inc.(a California corporation). (Attachments: #1 Exhibit Mueller Decl Exhibit 26, #2 Exhibit Mueller Decl Exhibit 27, #3 Exhibit Mueller Decl Exhibit 28, #4 Exhibit Mueller Decl Exhibit 29, #5 Exhibit Mueller Decl Exhibit 30, #6 Exhibit Mueller Decl Exhibit 31, #7 Exhibit Mueller Decl Exhibit 32, #8 Exhibit Mueller Decl Exhibit 33, #9 Exhibit Mueller Decl Exhibit 34, #10 Exhibit Mueller Decl Exhibit 35, #11 Exhibit Mueller Decl Exhibit 36, #12 Exhibit Mueller Decl Exhibit 37, #13 Exhibit Mueller Decl Exhibit 38, #14 Exhibit Mueller Decl Exhibit 39, #15 Exhibit Mueller Decl Exhibit 40, #16 Exhibit Mueller Decl Exhibit 41)(Related document(s) #660 ) (Selwyn, Mark) (Filed on 1/25/2012)

Mueller Exhibit 36

US007447516B2

(12) United States Patent

(lO) Patent No.:
US 7,447,516 B2
(45) Date of Patent:
Nov. 4, 2008

Heo et al.
(54)

References Cited
(56)
METHOD AND APPARATUS FOR DATA
TRANSMISSION IN A MOBILE
U.S. PATENT DOCUMENTS
TELECOMMUNICATION SYSTEM
6,594,501 B2* 7/2003 Black et al .................. 455/522
SUPPORTING ENHANCED UPLINK SERVICE
(Continued)

(75) Inventors: Youn-Hyoung Heo, Gyeonggi-do (KR);

Ju-Ho Lee, Suwon-si (KR); Joon-Young EP
Cho, Suwon-si (KR); Young-Bum Kim,
Seoul (KR); Yong-Jun Kwak,
Dongcheon-dong (KR)

Subject to any disclaimer, the term of this
patent is extended or adjusted under 35
U.S.C. 154(b) by 740 days.

Primary Examine~Matthew D. Anderson
Assistant Examiner Hai V Nguyen
(74) Attorney, Agent, or Firm Roylance, Abrams, Berdo &
Goodman L.L.R

(21) Appl. No.: 11/148,181
(22)

Filed:

Prior Publication Data
US 2006/0003787 A1

(30)

(57)

Jun. 9,2005

(65)

Jan. 5, 2006

Foreign Application Priority Data

Jun. 9,2004
Aug. 6,2004
Sep. 14,2004
Nov. 17,2004
ApE 7,2005

(KR) ......................
(KR) ......................
(KR) ......................
(KR) ......................
(KR) ......................

10-2004-0042300
10-2004-0062190
10-2004-0073552
10-2004-0093947
10-2005-0029192

(51) Int. Cl.
HO4Q 7/20
(2006.01)
(52) U.S. CI .......................... 4551522; 455/69; 375/225;
375/345
(58) Field of Classification Search .................. 455/522
See application file for complete search history.

REQUEST TRANSMISSION OF
E-DPDCH/DPDCH/DPCCH

/

(Continued)

OTHER PUBLICATIONS
Anonymous, Nokia, System impacts of maximum power reduction
due to the increased PAR with HS-DPCCH; TSG-RAN Joint Working Group 1 and 4 meeting Ad Hoc Espoo, Finland, Jan. 30, 2004.
(Continued)

(73) Assignee: Samsung Electronics Co., Ltd.,
Suwon-si (KR)

(*) Notice:

FOREIGN PATENT DOCUMENTS
1 237 296
9/2002

ABSTRACT

A method and an apparatus for data transmission in a mobile
telecommunication system supporting an enhanced uplink
service are provided. A Transport Format Combination (TFC)
selector determines TF information for data to be transmitted
through a first data channel not supporting Hybrid Automatic
Repeat reQuest (HARQ) and a second data channel supporting HARQ, and determines gain factors for the first and
second data channel, and first and second control channel
carrying control information for the first and second data
channel. The gain factors are input to a physical channel
transmission controller, and the physical channel transmission controller scales-down the gain factor for the second
channel if total transmit power required for transmission of
the channels exceeds the predetermined maximum allowed
power. A gain scaler adjusts transmit powers of the channels
using the scaled gain factor and gain factors for the first data
channel, the first control channel and the second control channel.
28 Claims, 14 Drawing Sheets

621

~,YES
SCALE GAIN FACTOR OF
E-DPDCH BY GAIN OFFSETI~

825

TRANSMIT
E-DPDCH/DPDCH/DPCCH

626

OF DPDCH/DPCOH/E-DFDCH F 624

APLNDC-WH-A 0000015619

US 7,447,516 B2
Page 2
U.S. PATENTDOCUMENTS
6,859,505 B2 *
6,930,981 B2 *
6,999,432 B2 *
7,050,825 B2 *
7,062,288 B2 *
7,079,489 B2 *
7,161,916 B2 *
7,206,332 B2 *
7,209,517 B2 *
7,304,971 B2*
7,321,780 B2 *
7,324,565 B2 *
7,339,949 B2 *
7,343,172 B2 *
7,376,209 B2 *
7,388,848 B2 *
2001/0053678 AI*
2002/0054578 A1 *
2002/0154612 AI*
2003/0054852 A1 *
2003/0101274 A1 *
2003/0123470 A1 *
2003/0186718 AI*
2003/0228876 AI*
2004/0009786 A1 *
2004/0037224 A1 *
2004/0042492 A1 *
2004/0077370 A1 *
2004/0102205 A1
2004/0190485 A1 *
2004/0219920 AI*
2004/0228315 AI*
2004/0258139 AI*
2005/0002478 A1 *
2005/0013263 A1 *
2005/0041694 A1 *
2005/0047366 A1 *
2005/0117559 A1 *
2005/0207359 A1 *

2/2005
8/2005
2/2006
5/2006
6/2006
7/2006
1/2007
4/2007
4/2007
12/2007
1/2008
1/2008
3/2008
3/2008
5/2008
6/2008
12/2001
5/2002
10/2002
3/2003
5/2003
7/2003
10/2003
12/2003
1/2004
2/2004
3/2004
4/2004
5/2004
9/2004
11/2004
11/2004
12/2004
1/2005
1/2005
2/2005
3/2005
6/2005
9/2005

Agami et al ................
Gopalakrishnan et al ....
Zhang et al .................
Ginesi et al .................
Raaf et al ...................
Massie et al ................
Malladi et al ...............
Kwan et al ..................
Sindhushayana et al .....
Balachandran et al .......
Love et al ...................
Malkamaki .................
Suzuki et al ................
Hwang .......................
Namgoong et al ..........
Virtanen et al ..............
Bonaccorso et al .........
Zhang et al .................
Massie et al ................
Ginesi et al .................
Yi et al .......................
Kim et al ....................
Raaf et al ...................
Hwang .......................
Terry ..........................
Choi et al ...................
Suzuki et al ................
Dick et al ...................
Yi et al.
Khan .........................
Love et al ...................
Malkamaki .................
Namgoog et al ............
Agami et al ................
Kim et al ....................
Liu ............................
Ghosh et al .................
Malladi et al ...............
Hwang et al ................

375/345
370/252
370/328
455/522
455/522
370/236
370/332
375/140
375/225
370/337
455/522
370/535
370/468
455/522
375/341
370/329
455/137
370/328
370/329
455/522
709/232
370/437
455/522
455/522
455/522
370/235
370/473
455/522
370/349
455/442
370/342
375/147
375/345
370/320
370/524
370/329
370/342
370/278

2005/0213536 AI*
2005/0237932 AI*
2005/0250497 AI*
2005/0250511 A1 *
2006/0003794 AI*
2006/0023687 AI*
2006/0264220 AI*
2007/0091852 AI*
2007/0168831 AI*
2007/0189223 AI*
2008/0062932 AI*
2008/0090602 AI*

9/2005
10/2005
11/2005
11/2005
1/2006
2/2006
11/2006
4/2007
7/2007
8/2007
3/2008
4/2008

Virtanen et al ..............
Liu ............................
Ghosh et al .................
Xiao et al ...................
Chung et al .................
Cheng et al .................
Chen et al ...................
Malladi et al ...............
Kimetal ....................
Hwang .......................
Hwang .......................
Holmaet al ................

370/329
370/230
455/436
455/453
455/522
370/342
455/454
370/332
714/755
370/331
370/331
455/522

FOREIGN PATENT DOCUMENTS
JP
JP
JP
JP
JP
JP
JP
JP
JP
WO
WO

2002-217828
2004 -064797
2004 - 173017
2005-167963
2005-530458
2005-311882
2007-124682
2007-531432
2007-531433
WO 03/052963
WO 2004/034608

8/2002
2/2004
6/2004
6/2005
10/2005
11/2005
5/2007
11/2007
11/2007
6/2003
4/2004

OTHER PUBLICATIONS
Anonymous, Panasonic, LS on minimum power limit, 3GPP TSG
RAN WG1 Meeting #36, Malaga, Spain, Feb. 16-20, 2004.
Anonymous, Siemens, HARQ Retransmission Power for Enhanced
Uplink DCH, TSG-RAN Working Group 1 #36, Malaga, Spain, Feb.
16-20, 2004.
Anonymous, Siemens, Performance of the HARQ Retransmission
Power Offset Scheme for 10ms TTI, TSG Working Group 1 #37,
Montreal, Canada, May 10-14, 2004.
3ld Generation Partnership Project; Technical Specification Group
Radio access Network; Feasibility Study for Enhanced Uplink for
UTRA FDD (Release 6) 3GPP TR 25.896 V6.0.0, XX, XX, Mar.
2004 pp. 1-91, XP002342958.

* cited by examiner

APLNDC-WH-A 0000015620

U.S. Patent

Nov. 4, 2008

Sheet 1 of 14

US 7,447,516 B2

APLNDC-WH-A 0000015621

U.S. Patent

Nov. 4, 2008

US 7,447,516 B2

Sheet 2 of 14

Node B
y.203
E-DCH SETUP
204
SCHEDULING INFORMATION
BS PERFORM SCHEDULING /
USING RECEIVED SCHEDULING ~,"’211
. INFORMATION OF MANY TERMINALS/
F205
SCHEDULING ASSIGNMENT INFORMATION
/-212
TERMINAL DETERMINE TF OF ~
E-DCH BASED ON SCHEDULING|
INFORMATION RECEIVED |
FROM BS
[

~,,

,F"206
INFORMATION RELATED TO TF

I

.../_207
UL PACKET DATA TRANSMISSION USING E-DCH (
CHECK EXISTENCE OF
ERRORS IN RECEIVED
INFORMATION ANO CREATE
ACK/NACK INFORMATION
208
ACK/NACK

FIG.2
(PRIOR ART)

APLNDC-WH-A 0000015622

U.S. Patent

Nov. 4, 2008

Sheet 3 of 14

US 7,447,516 B2

9
Videotelephony
Uploading of
multimedia mails

Node B

316 ~
Games
317

FIG.3
(PRIOR ART)

APLNDC-WH-A 0000015623

U.S. Patent

Nov. 4, 2008

Sheet 4 of 14

US 7,447,516 B2

O

APLNDC-WH-A 0000015624

U.S. Patent

US 7,447,516 B2

Sheet 5 of 14

Nov. 4, 2008

405
EQUALLY SCALE EACH
CHANNEL WITHIN Pm~x

4O2

4O7

404

401

P~,

E-DPDCH
E-DPDCH
E-DPDCH

DPDCH

DPCCH

DPCCH

DPDCH
DPCCH

T1

T2

T3

FIG.5
(PRIOR ART)
505
502

SCALE ONLY E-DPDCH

5O7
501
!

504
1 I’--DPUCH

E-DPDCH
E-DPDCH

DPDCH

DPCCH

DPCCH

E-DPCCH

E-DPCCH

DPDCH
DPCCH
E-DPCCH

T1

T2

T3

FIG.6
APLNDC-WH-A 0000015625

U.S. Patent

Sheet 6 of 14

Nov. 4, 2008

US 7,447,516 B2

START)
REQUEST TRANSMISSION OF |
E-DPDCH/DPDCH/DPCCH
V601
602

NO
,YES 603

NO
YES
DERIVE GAIN FACTOR OF
E-DPDCH CAUSING TOTAL
TRANSMISSION POWER NOT ro
EXCEED Pm~x

605

EQUALLY SCALE ALL POWERS
OF DPDCH/DPCCH/E-DPDCH-604

TRANSMIT E-DPDCH/DPDCH/DPCCH

FIG.7

APLNDC-WH-A 0000015626

Cc

Control
Information

DCH Data

#714
DPDCH El
GENERATORI "I

i

E-DPCCH
3ENERATOR

2-715

#716 ii ,,~

I

!

o
o
o
o

Coding

,,~

COD,, LOOK "718
"/I/
I ’

Sdpch,n

I

Dec

724

CODING
BLOCK

MODULATOR

#710

TFC

723

CODING H
BLOCK
GENERATORI "
MODU~TOR~

,ec

E-DCH E-DPDCH
Data GENERATOR

I~c

2-719
DPCCH

2.711

Buffer
MODULATOR
RATE MATCHER

t 2.726
HARQ
CONTROLLER I

Ce

Pe

y702 INITIAL
I TRANSMISSION/

TFC
,~RETRANSMISSION
I SELECTOR }---701 704"-’-" PPm~E’~ PHYSICAL CHANNEL ---706
TRANSMISSION
I
705-- [~eori, ~c, Pd
CONTROLLER
=I

FIG.8

U.S. Patent

Nov. 4, 2008

Sheet 8 of 14

US 7,447,516 B2

~ START )
REQUEST TRANSMISSION OF
E-DPDCH/DPDCH/DPCCH

621

NO
,~YES
SCALE GAIN FACTOR OF
E-DPDCH BY GAIN OFFSET

EQUALLY SCALE ALL POWERS
OF DPDCH/DPCCH/E-DPDCH

624

TRANSMIT
E-DPDCH/DPDCH/DPCCH

FIG.9

APLNDC-WH-A 0000015628

U.S. Patent

Nov. 4, 2008

US 7,447,516 B2

Sheet 9 of 14

START

8O2
803

E-DCH EXIST

DCH EXIST
804

SELECT E-TF FOR E-DCH~
WITHIN TRANSMI’FI’ABLE
DATA RATE

EXIST

SELECT TFC FOR DCH FROML
AMONG ALLOWABLE TFCS
NO
807

806
SELECT TFC FOR DCH FROM~
AMONG ALLOWABLE TFCS
808
SELECT E-TF FOR E-DCH
TRANSMITTABLE WITHIN
RESIDUAL POWER

SELECT E-TF FOR
E-DCH FROM AMONG
ALLOWABLE E-TFS
809
SELECT TFC FOR DCH
TRANSMITTABLE WITHIN
RESIDUAL POWER
I

YES{
COMPARE TF OF INITIAL
TRANSMISSION WITH
E-TF (TF-re}

TF_new = TF_initial
new gain fa.ctor =,
gain factor (TF_re)

|
I
~--814 I
~ ’~’"~
TF_new = TF_initial
new gain factor =
gain factor (TF_inital)

F

813

TRANSMIT E-DCH OR

R~I.,,I I lqllMt"2 QIZI C~TCR

TFC OR TF

FIG.IO

APLNDC-WH-A 0000015629

f908
Control
Information

j-909
DCH Data

/-910
Data / GENERATOR

Cc

I~c

~I DPCCH L~ CODING HMODULATOR
~IGENERATOI1 "] BLOCK
~

/-917
,F918
2
~-91911 .~
DPDCH LJ
~
BLOCK
"] CODING H MoDULATOR~
~GENERATOt
I
"-920 ’-921
/-912
/-911 , ~ , /-914
CODING
Buffer
MODULATOR
BLOCK ~,...,,!RATE MATCHE~ ~

928

¢904
HARQ"
SELECTED )~INFORMATION I.
9O2
tx,ori ~----~

~L---901
TFC SELECTOR /

-&
-Ce
| 2-913
HARQ
CONTROLLER I
/.906
¢905
TF INFORMATION/> I PHYSICALCHANNEL/
GAIN FACTOR
i TRANSMISSION
CONTROLLER

903

FIG.11

D~--.-"-907

U.S. Patent

Sheet 11 of 14

Nov. 4, 2008

US 7,447,516 B2

o
o

APLNDC-WH-A 0000015631

U.S. Patent

US 7,447,516 B2

Sheet 12 of 14

Nov. 4, 2008

START
REQUEST TRANSMISSION OF
E-DPDCH/DPDCH/DPCCH/E-DPCCH --130!
IIII

DERIVE GAIN FACTOR OF E-DPDCH
CAUSING TOTAL TRANSMISSION
POWER NOT TO EXCEED Pmax

~

.

NO

ES

~

EQUALLY SCALE OTHER CHANNELS -1305

TRANSMIT
E-DPDCH/DPDCH/DPCCH/E-DPC, CH 1306
~__
I

FIG.13
APLNDC-WH-A 0000015632

Cc

Control
Info~mation

I]c

4 348d.ch,n

T

~-{ DPCCH l--J CODING I~MODULATOR~
-~GENERATORI -I BLOCK
’-1426 "1430

f 1403
DCH Data

/-1414

,F1418

"----~GENERATORI I
/-1415

GENERATORI
~
f1402
E-DCHData

"’
f1419

j.-1423

’

~d ,~d

"-142~ "1431

[-1424
MODULATOR

"] BLOCK

Cec
r 1425
HARe II
I Buffer ~IMODULATOR~
" I .._~r1429.._~-1433
I
I
RATE MATCHEI~ ’
y1420

,

/-1409
CONTROLLER

Power amp
CONTROLLER

1,,1~R
I

o
o
o
o
o
O~

FIG.14

I

j.-1405
I]eo~l, I~e~, I]~ ,

Prn~’ ’~J PHYSICAL CHANNEL|
TRANSMISSION IPc’ lid, I~ec, Be
.q CONTROLLER F

1410
TPC command

,r-1513
>1 DPOOH

r1514

S 1503
DCH Data

r1518

r1515

Control
Inlormation

y1517
CODING

Cc

r1519

/-1522 | | /1534

I

I^Tt~13~

r1523

f1524
E-DPCCH ~ ~OODING ........ .~
I.~
S 1502r /-1504.
E-DCH_~J E-DPDCH

f1516 ,
I CODING~

f1520

"
,

Io

o,, e’ I

c~+

y1525

._

I

_I

~+~ I
I

l l"*~ I I~
I ~~I
! ~ c H~uff~~°OU~T°~~
__ ~co ~ " I~E~c~ ,
,, ? ?

7

I ,2~, I~
I

I

I

I
I
,S~509

Power amp I

~
o
o
o
o
o

CONTROLLER

TFC SELIECT

?

,

FIG.15

,

S1505
l~ec, 1~,., lid

Pm~

PHYSICAL CHANNEL
TRANSMISSION
CONTROLLER

P_estO

’I

TPC command

US 7,447,516 B2
1

2

METHOD AND APPARATUS FOR DATA
TRANSMISSION IN A MOBILE
TELECOMMUNICATION SYSTEM
SUPPORTING ENHANCED UPLINK SERVICE

uling assignment information may include an allowed rate,
allowed timing, KEEP/UP/DOWN for an uplink and the like.
In step 212, the UE 202 determines a Transport Format
(hereinafter referred to as ’TF’) of the E-DCH to be transmit5 ted over the uplink using the scheduling assignment informaPRIORITY
tion.
In steps 206 and 207, the UE 202 transmits a Transport
This application claims the benefit under 35 U.S.C. 119(a)
Format Resource Indicator (TFRI), information related to the
of applications entitled "Method and Apparatus for Data
determined TF, and uplink packet data (UL packet data)
Transmission in Mobile Telecommunication System Sup- 10 including E-DCH data to the Node B 201.
porting Enhanced Uplink Service" filed in the Korean IndusIn step 213, the Node B 200 determines whether the infortrial Property Office on Jun. 9, 2004, Aug. 6, 2004, Sep. 14,
mation relating to the TF and the E-DCH data have errors. At
2004, Nov. 17, 2004 and Apr. 7, 2005 and assigned Ser. Nos.
this time, the Node B determines the information to be a
2004-42300, 2004-62190, 2004-73552, 2004-93947 and
Negative Acknowledge (hereinafter referred to as ’NACK’) if
2005-29192, respectively, the entire contents of which are 15 there is any error in the information and determines the inforhereby incorporated by reference.
mation to be a Positive Acknowledge (hereinafter referred to
as ’ACK’) if there is no error in the information.
BACKGROUND OF THE INVENTION
In step 208, the Node B transmits ACK/NACK information
to the UE 202 through an ACK/NACK channel according to
2o the result judged in step 213. At this time, the UE 202 trans1. Field of the Invention
The present invention relates to a mobile telecommunicamits new data if it receives the ACK and retransmits the
tion system supporting an enhanced uplink service. More
previous data if it receives the NACK.
particularly, the present invention relates to a power setting
FIG. 3 illustrates an example of data transmission through
method and a power setting apparatus for transmitting data
the E-DCH in the WCDMA system.
25
based on characteristics ofuplink channels.
As shown in FIG. 3, if data 316 to be transmitted, including
2. Description of the Related Art
video telephony, uploading of multimedia mail, games, etc.,
An Enhanced-uplink Dedicated Channel (hereinafter
occurs, a UE 317 spreads the data 316 using a code assigned
referred to as ’E-DCH’) has been proposed to improve the
to a physical channel 318 and then transmits it to a Node B
performance of uplink packet transmission in a Wideband
30 319.
Code Division Multiple Access (hereinafter referred to as
The E-DCH is mapped to and transmitted through an
’WCDMA’) system. Along with the introduction of the
Enhanced Dedicated Physical Data Channel (hereinafter
E-DCH, a plan is under discussion to use Adaptive Modulareferred to as ’E-DPDCH’) using a code multiplexing
tion and Coding (hereinafter referred to as ’AMC’), Hybrid
scheme. The E-DPDCH may coexist with a DPDCH to which
Automatic Retransmission Request (hereinafter referred to as
35 a DCH, a typical uplink transmission channel of a UE, is
’HARQ’) and Node B control scheduling methods for an
mapped, a Dedicated Physical Control Channel (hereinafter
uplink.
referred to as ’DPCCH’) which carries control information
FIG. 1 is a basic conceptual view illustrating a situation
related to the DPDCH, and an Enhanced DPCCH (hereinafter
where the E-DCH is used.
referred to as ’E-DPCCH’) which carries control information
Referring to FIG. 1, a Node B 100 supports the E-DCH and
4o related to the E-DPDCH. A UE sets transmit powers of the
detects channel states of User Equipments (hereinafter
respective physical channels according to the current maxireferred to as ’UE’) 101,102, 103,104 using the E-DCH to
mum transmit power which is allowed to the UE. The maxiperform scheduling suitable for the respective UEs via paths
mum transmit power may be determined by the transmission
111, 112, 113 and 114, respectively. That is, the Node B 100
capability of a power amplifier of the UE and a minimum
assigns a low data rate to the UE 104 at a remote location and
45 value of a transmit power set by a network. At this time, the
assigns a high data rate to the UE 101 at a close location while
transmit powers of the physical channels other than the
maintaining a noise rise value below a threshold noise rise
DPCCH are determined according to power ratios relative to
value.
the DPCCH.
FIG. 2 illustrates basic transmission!reception procedures
FIG. 4 is a block diagram illustrating a structure of a
of the E-DCH.
5o conventional physical layer transmission stage of a UE.
Referring to FIG. 2, in step 203, a Node B 200 and a UE 202
Referring to FIG. 4, the UE 317 encodes data to be transestablish the E-DCH. The establishment of the E-DCH
mitted through a data channel via a coding block 305. Control
includes a procedure of delivering messages through a dedi- information necessary for the reception of the data channel is
cated transport channel.
also generated separately for a control channel. Here, the data
In step 204, the UE 202 informs the Node B 200 of sched- 55 channel represents the DPDCH or the E-DPDCH and the
uling information. The scheduling information may be inforcontrol channel represents the DPCCH or the E-DPCCH.
mation on the UE’s transmit power, from which uplink chanThe control information and the encoded data are modunel information can be derived, or include information on
lated by modulators 300, 306, respectively. The modulated
extra power, with which the UE can transmit data, and the
control information and data are spread by spreaders 301,307
amount of data to be transmitted, which is stored in a buffer of 6o using channelization codes ofthe data channel and the control
the UE.
channel, that is, CC and Cd, respectively and then are transIn step 211, the Node B 200 performs scheduling for sevmitted to gain scalers 302, 308, respectively. The spread coneral UEs including the UE 202 while monitoring the schedtrol information and data are multiplied by gain factors given
uling information received from the respective UEs.
to the control channel and the data channel, that is, [3c, [3d in
When the Node B 201 determines to permit uplink packet 65 the gain scalers 302, 308, respectively and then are multitransmission to the UE 202, it transmits scheduling assignplexed by a multiplexer 303. The multiplexed data is input to
ment information to the UE 202 in step 205. Here, the scheda scrambler 304 to be scrambled by a scrambling code S@~,,,,

APLNDC-WH-A 0000015635

US 7,447,516 B2
3

4

of the DPCH and then is converted into a Radio Frequency
powers of all the physical channels are always equally scaled
(RF) signal through an RF unit 309 to be wirelessly transmitin a case where the DCH and the E-DCH have different
ted by an antenna.
priorities from each other, transmission quality of the DCH or
The gain factor is a value for setting powers of the relevant
the E-DCH may deteriorate due to retransmission. To give an
physical channel based on the DPCCH which is subjected to
example, even if the DCH is used for a voice call having
power control and is set according to data sizes and services
higher priority, DCH data may be transmitted with a very low
types of the respective physical channels. The gain factor, one
level of power in some time slots within one TTI due to
of the components constituting a TF, is set according to a
retransmission of the E-DCH data having lower priority,
Transport Format Combination (hereinafter referred to as
which results in quality deterioration of the voice call.
’TFC’). The gain factor is determined by a TFC selection part 10
Therefore, in a case where an E-DCH supporting HARQ
of an upper layer, which in turn determines a format of transexists, there is a strong desire to provide a technique for
mission channel data, and is transmitted to the physical layer.
efficiently controlling the transmit power of each physical
The physical channel sets the transmit power of each physical
channel when the total transmit power of a UE exceeds the
channel according to the gain factor. At this time, the UE
maximum allowed transmit power.
scales the gain factor of each physical channel such that it 15
does not exceed a maximum allowed power.
SUMMARY OF THE INVENTION
If only a TFC satisfying an allowable power level is
selected through the TFC selection in a case of desiring to
Accordingly, the present invention has been made to solve
further use the E-DCH in addition to the transmission chanat least the above-mentioned problems occurring in the prior
nels defined in the conventional system, the gain factors of all 2o art, and an object of the present invention is to provide a
the physical channels are equally scaled when total transmit
method and an apparatus for efficiently controlling transmit
power exceeds the maximum allowed power. The E-DCH
power of each physical channel when total transmit power of
supports a HARQ technique in which demodulation at a
a user equipment (UE) exceeds the maximum allowed power
reception stage is possible only by always using the same
in a case of supporting a packet service through uplink chantransmission format as that of the initial transmission even 25 nels.
during retransmission. Thus, the TFC selection part always
The present invention provides a method and an apparatus
selects the same TFC as that of the initial transmission irrefor adjusting power of a specific transmission channel when
spective of allowable TFCs when E-DCH data is retransmitenhanced uplink dedicated channel (E-DCH) data is retransted. In general, the transmit power during retransmission is
mitted.
set to the same level as that of the initial transmission.
30
The present invention also provides a method and an appaIn some situations, there may be a case where DCH data
ratus for adjusting transmit powers of an E-DCH and a uplink
does not exist at the initial transmission of the E-DCH and the
dedicated channel (DCH) differently from each other accordDCH data occurs at retransmission. There may also be a
ing to transmission conditions and priorities of the channels.
situation where the E-DCH data must be retransmitted under
the condition of a fixed TF and fixed transmit power of the 35 In order to accomplish the above-mentioned object, in
accordance with one aspect of the present invention, there is
DCH when a Transmission Time Interval (hereinafter
provided a method for transmitting data of a first channel not
referred to as ’TTI’) of the E-DCH is set to less than the
supporting Hybrid Automatic Repeat reQuest (HARQ) and a
minimum TTI of the DCH. In such situations, ifa UE uses the
second channel supporting the HARQ in a mobile telecomsame power as that of the initial transmission for retransmission of the E-DCH data, it is likely to result in total transmit 4o munication system which supports an enhanced uplink service. The method comprising the steps of setting transmit
power exceeding the maximum allowed power. Although it is
power factors for the channels and determining if total transpossible to transmit all the physical channels within the maximit power required for transmission of the channels exceeds
mum allowed power by equally scaling down powers of all
the maximum allowed power; scaling-down the transmit
the physical channels while maintaining their power ratios,
transmission qualities of the respective physical channels 45 power factor for the second channel if the total transmit power
exceeds the maximum allowed power; and transmitting data
may not be ensured.
through the first and second channels using the scaled-down
FIG. 5 is a diagram illustrating an example of problems
transmit power factor for the second and the transmit power
occurring during conventional retransmission of E-DCH
factor for the first channel.
data.
As shown in the drawing, a UE initially transmits E-DCH 50
In accordance with another aspect of the present invention,
there is provided an apparatus for transmitting data of a first
data through an E-DPDCH in time slot T1. Since there is no
DCH data in time slot T1, total transmit power 401 does not
channel not supporting HARQ and a second channel supportexceed the maximum allowed power (P ..... ) 407. However, in
ing the HARQ in a mobile telecommunication system which
time slot T2 in which retransmission of the E-DCH data
supports an enhanced uplink service. The apparatus comprisoccurs, DCH data is transmitted through a DPDCH and thus 55 ing a controller for setting transmit power factors for the
the total transmit power 402 including those of the E-DPDCH
channels, determining if total transmit power required for
and the DPDCH exceeds the maximum allowed power
transmission of the channels exceeds the maximum allowed
407. Thus, as designated by reference numeral 405, the transpower, and scaling-down the transmit power factor for the
mit powers of the E-DPDCH, the DPDCH and a DPCCH are
second channel if the total transmit power exceeds the maxiequally scaled down. As a result of this, after the transmit 6o mum allowed power; first and second channel generators for
powers of the physical channels have been scaled down, the
generating first and second data frames by performing chantotal transmit power 404 does not exceed the maximum
nel-coding and modulation of the first and second channel
allowed power 407 in time slot T3.
data; and a gain scaling unit for adjusting the transmit powers
However, qualities of all the E-DPDCH, the DPDCH and
of the first and second channels, with which the data frames of
the DPCCH at a reception stage are all lowered in time slot T3 65 the first and second channels is transmitted, using the scaled
because such physical channels are transmitted using less
transmit power factor for the second channel and the transmit
power than those in time slot T2. In particular, if the transmit
power factor for the first channel.

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5

6

BRIEF DESCRIPTION OF THE DRAWINGS

Referring to FIG. 6, a UE initially transmits E-DCH data
through an E-DPDCH in time slot T1. Since there is no DCH
The above and other objects, features and advantages of the
data in time slot T1, total transmit power 501 does not exceed
present invention will be more apparent from the following
the maximum allowed power (P ..... ) 507. However, in time
detailed description taken in conjunction with the accompa- 5 slot T2 in which retransmission of the E-DCH data occurs,
nying drawings, in which:
DCH data is transmitted through a DPDCH and thus the total
FIG. 1 is a basic conceptual view illustrating a situation
transmit power 502 exceeds the maximum allowed power
507. At this time, as designated by reference numeral 505,
where an enhanced uplink dedicated channel (E-DCH) is
only the transmit power of the E-DPDCH is scaled down. As
used for conventional data transmission;
FIG. 2 is a view illustrating basic transmission and recep- 10 a result of this, after the transmit power of the E-DPDCH has
tion procedures of the conventional E-DCH;
been scaled down, the total transmit power 504 does not
FIG. 3 is a view illustrating an example of data transmisexceed the maximum allowed power 507 in time slot T3 and
sion through the conventional E-DCH in a WCDMA system;
the power levels of the other channels, that is, an enhanced
FIG. 4 is a block diagram illustrating a structure of a
dedicated physical control channel (E-DPCCH), a dedicated
transmission stage of a conventional user equipment (UE); 15 physical data channel (DPDCH) and a dedicated physical
FIG. 5 is a diagram illustrating an example of problems
data channel DPCCH are maintained identically to those in
occurring during retransmission of conventional E-DCH
time slot T2. Thus, a problem of reduction in a power level of
the DCH due to the E-DCH can be avoided and the DCH data
data;
FIG. 6 is a diagram illustrating an example of changing can be transmitted stably.
transmit power ofa UE in accordance with an embodiment of 2o
The transmit powers of the E-DCH and the DCH are conthe present invention;
trolled by varying predetermined transmit power factors for a
FIG. 7 is a flowchart illustrating procedures of setting
physical channel to which the relevant channel is mapped. In
transmit powers of physical layers ofa UE in accordance with
a WCDMA system, the transmit power factor signifies a gain
a first embodiment of the present invention;
factor specific to each channel. FIG. 6 illustrates a case where
FIG. 8 is a block diagram illustrating a transmitter unit of a 25 the DCH data transmission is preferentially ensured by scalUE in accordance with the first embodiment of the present
ing the gain factor of the E-DCH. In another case where the
invention;
E-DCH has priority over the DCH, it is also possible to scale
FIG. 9 is a flowchart illustrating procedures of setting
the transmit power of the DCH. The following description
transmit powers of physical layers ofa UE in accordance with
will be given on the assumption that the transmit power is
a second embodiment of the present invention;
3o scaled using gain factors of the respective channels. HereinFIG. 10 is a flowchart illustrating procedures of selecting a
after, various embodiments of the present invention will be
Transport Format Combination (TFC) in accordance with a
described.
third embodiment of the present invention;
EXAMPLE 1
FIG. 11 is a block diagram illustrating a transmitter unit of
a UE in accordance with the third embodiment of the present 35
In a first embodiment of the present invention, total transinvention;
mit power is scaled by recalculating a gain factor of a specific
FIG. 12 is a diagram illustrating power setting ofa UE in
channel, that is, an E-DPDCH such that the total transmit
accordance with a fourth embodiment of the present invenpower does not exceed the maximum allowed power in an
tion as compared with a prior art;
FIG. 13 is a flowchart illustrating procedures of setting 4o upper layer ofa UE. According to this first embodiment of the
present invention, when both E-DCH data and DCH data
power of a UE in accordance with the fourth embodiment of
the present invention;
exist, the UE checks if the E-DCH data is retransmitted. If a
FIG. 14 is a block diagram illustrating an example of a result of the checking shows retransmission of the E-DCH
data, a gain factor of the E-DPDCH to which the E-DCH is
transmitter unit of a UE in accordance with the fourth
embodiment of the present invention; and
45 mapped is reset at the time of the transmission.
FIG. 7 illustrates procedures of setting transmit powers of
FIG. 15 is a block diagram illustrating another example of
physical layers of a UE in accordance with the first embodia transmitter unit of a UE in accordance with the fourth
ment of the present invention.
embodiment of the present invention.
Referring to FIG. 7, in step 601, a UE detects a transmisDETAILED DESCRIPTION OF EXEMPLARY
5o sionrequest of E-DPDCH/DPDCH/DPCCH data, including
EMBODIMENTS
gain factors of the respective channels. In step 602, the UE
having detected the transmission request estimates total
Hereinafter, embodiments of the present invention will be
transmit power P~ using the gain factors of the channels to be
described with reference to the accompanying drawings.
transmitted. That is, the UE measures its transmit power in
Also, in the following description, a detailed description of 55 each time slot in order to check its power condition. The UEs
known functions and configurations incorporated herein will
estimate the total transmit power P~ of channels to be transbe omitted for conciseness.
mitted based on the measured transmit power and using given
gain factors required for the next transmission.
The present invention to be described below ensures transmission qualities of physical channels except an Enhanced
The UE checks if the total transmit power P~ exceeds the
Dedicated Physical Data Channel (E-DPDCH), to which an60 maximum allowed power P ..... in step 602. If the total transenhanced uplink dedicated channel (E-DCH) is mapped, by mit power does not exceed the maximum allowed power, the
scaling down transmit powers of the E-DPDCH when the UE proceeds to step 606 to transmit the data through each
total transmit power of a user equipment (UE) supporting the
relevant channel.
E-DCH exceeds its maximum allowed power.
If the total transmit power exceeds the maximum allowed
FIG. 6 illustrates an example of changing transmit powers 65 power, the UE checks whether E-DCH data to be transmitted
of a UE in accordance with an embodiment of the present through the E-DPDCH corresponds to initial transmission
invention.
data or retransmission data. If the E-DCH data is determined

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7

8

the E-DPDCH has been scaled is required in view of a
to be initially transmitted, the UE equally scales powers of all
the channels while keeping power ratios between the chanreceiver structure of a Node B scheduler, the UE may signal
information indicating that the power ratio of the E-DPDCH
nels constant in step 604. In another embodiment, the UE may
has been scaled to the Node B by physical layer signaling.
defer transmission of a channel having lower priority accordIn an E-DCH environment, the transmit power of the
ing to priorities of the DCH-data and the E-DCH data and 5
E-DCH is scaled through the gain factor of the E-DPDCH
select gain factors for the other channels in a conventional
which is set according to a TF. In addition, the transmit power
manner or may set transmit power for an channel having
having been scaled through the gain factor may be further
higher priority before anything else and then set powers for
scaled if necessary. As an example, the transmit power of the
the other channels such that the total transmit power does not
exceed the maximum allowed power.
10 E-DCH to be serviced is controlled according to a required
Quality of Service (QoS). Here, one bit, which represents an
If the E-DCH data is to be retransmitted, the UE derives
increase of the transmit power when it increases, is included
again the gain factor of the E-DPDCH such that the total
in E-DCH control information and is signaled to a Node B. As
transmit power does not exceed the maximum allowed power
another example, when the amount of E-DCH data to be
and scales only powers of the E-DPDCH in step 605. A
transmitted is transmitted through the E-DCH, a UE increases
method for deriving the gain factor will be described later in 15 the transmit power of the E-DCH. At this time, one bit for
detail. After the completion of step 604 or 605, the UE prorepresenting the increase of the transmit power is included in
ceeds to step 606 to transmit the relevant data through the
E-DCH control information and is signaled to a Node B
channels using the gain factor of the E-DPDCH and the gain
through an E-DPCCH.
factors of the other channels.
Hereinafter, a description will be given for a method sigIn FIG. 7, although it is described that the procedure of 2o naling information representing that transmit power of an
checking if the total transmit power exceeds the maximum
E-DPDCH has been scaled in a physical layer.
allowed power (step 602) precedes the procedure of checking
A 1-bit indicator indicating that the transmit power of the
if the E-DCH data is initial transmission data or retransmisE-DPDCH has been scaled is assigned to the E-DPDCH.
sion data (step 603), the order of steps 602 and 603 may be
Types of control information comprising such a 1-bit indicaexchanged with each other.
25 tor and bit configurations according to the respective control
Since a case where the total transmit power exceeds the
information are shown below in Table 1.
maximum allowed power occurs during only one TTI, the UE
performs the procedures shown in FIG. 7 TTI by TTI. When
TABLE 1
the total transmit power continually increases and finally
exceeds the maximum allowed power by virtue of power
Control information
No. of bits
control during actual transmission, powers of all the channels 30
TFI
5
are equally scaled in a conventional manner while their power
Power de-boosting indicator
1
ratios are maintained.
Power boosting indicator
1
The gain factor of the E-DPDCH, which causes the total
MAC-e signaling indicator
1
transmit power not to exceed the maximum allowed power,
NDI
2
can be derived from the following equation (Equation (1)). 35
This means that retransmit power of the E-DCH is reduced by
A TFI (TF Index) is an index indicating a TF of an E-DCH
a certain ratio relative to the previous transmit power within a
which is transmitted in a corresponding TTI, a power derange not exceeding the maximum allowed power.

boosting indicator is an identifier indicating that transmit
power of the E-DCH has been scaled down in accordance
(1) 4o with the first embodiment of the present invention, a power
P~,o,-i)
boosting indicator is an identifier indicating that the transmit
wherein [3e,o~, [3c and [3d denote gain factors of the E-DPDCH/ power of the E-DCH has been scaled up in consideration of
DPCCH/DPDCH determined by a TFC selection part,
QoS, a MAC-e signaling indicator is an identifier indicating
denotes a new gain factor of the E-DPDCH causing total
that the transmit power of the E-DCH has been scaled up in
transmit power not to exceed the maximum allowed power, 45 order to transmit buffer status information, and an NDI (New
P denotes total transmit power estimated using [3~,o~,
Data Indicator) is an identifier for informing initial transmisanl] [3d and subscript ’or1’ is intended to represent that [3~,o~, a
sion packet as HARQ information. In this way, the E-DPDCH
prior value to scaling, is applied to the estimation, P
uses bits which are discriminated according to control infordenotes a maximum transmit power allowed to the UE (that
mation and are assigned thereto.
is, the maximum allowed power) and sqrt represents square 50 Here, since the power de-boosting indicator, the power
root.
boosting indicator and the MAC-e signaling indicator are
Equation (1) is an equation for deriving a new gain factor
related directly to the increase/decrease of transmit power
by which power of the E-DPDCH is reduced while transmit
and/or normal transmission, a 2-bit indicator is used in
powers of the DPDCH and the DPCCH are kept constant
another embodiment of control information as shown below
when the total transmit power exceeds the maximum allowed
55 in Table 2.
power. [3~ derived from Equation (1) becomes smaller than
[3e,o~.i. That is, the UE can transmit the E-DPDCH within the
TABLE 2
total transmit power not exceeding the maximum allowed
power. If [3~ calculated by Equation (1) is an imaginary value,
Control information
No. of bits
the transmit power of the E-DPDCH is regarded as ’0’. When
TFI
5
[3~ calculated by Equation (1) is smaller than a predetermined 60
Power indicator
2
minimum value, the UE does not perform retransmission of
NDI
2
the E-DCH data in the current time slot, but may try to
retransmit the E-DCH data in a next time slot.
Table 2 shows an example of constructing physical layer
In an environment where the E-DPCCH is transported only
when the E-DPDCH exists, it is possible not to transmit the 65 signaling information which indicates scaling of the E-DCH
using the 2-bit power indicator. At this time, the Power indiE-DPCCH when the E-DPDCH is not retransmitted. Also, in
a case where information representing that a power ratio of
cator represents the following contents shown in Table 3.

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US 7,447,516 B2
9

10

the control of the HARQ controller 726. The rate-matched
data is modulated by a modulator 711, is spread by a chanTABLE 3
nelization code Ce of the E-DPDCH in a spreader 712, is
Power indicator
Description
multiplied by the gain factor [3e of the DPCCH reset by the
s physical channel transmission controller 706 in a gain scaler
00
Normal power
01
Power de-boosting
713, and then is transmitted to the multiplexer 723.
10
Power boosting
If control information for the E-DCH including TFC infor11
MAC-e signaling
mation selected for the E-DPDCH (that is, control information for the E-DPDCH) is received, an E-DPCCH generator
Since the MAC-e signaling generally signifies the increase 10 731 generates an E-DPCCH frame including the control
of transmit power of the E-DCH, the power indicator may information for the E-DCH. The E-DPCCH frame is encoded
represent the following contents shown in Table 4 in another
in a coding block 727, is modulated by a modulator 728, is
embodiment.
spread by a channelization code C~c of the E-DPCCH in a
spreader 729, is multiplied by a gain factor [3~c of the
15 E-DPCCH in a gain scaler 730, and then is transmitted to the
TABLE 4
multiplexer 723.
Power indicator
Content
The data from the gain scalers 722, 718, 713, 730 are
multiplexed in the multiplexer 723, is input into a scrambler
00
Normal power
01
Power de-boosting
724 to be scrambled by a scrambling code Sap~,,,,, and then is
10
Power boosting and MAC-e signaling
2o RF-converted and transmitted by an RF unit 725.
11

Reserved case

EXAMPLE 2
Hereinafter, a description will be given for a transmitter
unit of a UE for realizing the first embodiment with reference
In a second embodiment of the present invention, if total
to FIG. 8.
25 transmit power exceeds the maximum allowed power in a
Referring to FIG. 8, a UE uses a DPCCH, a DPDCH, an
case where E-DCH data is retransmitted, the total transmit
E-DPCCH and an E-DPDCH as uplink channels. A TFC
power is scaled by reducing a gain factor of the E-DCH by a
selector 701 sets corresponding gain factors in conformity
predetermined gain offset.
with requirements in terms of data rates and transmission
According to this second embodiment of the present invenqualities of the channels. A HARQ controller 726 transmits 30 tion, a new gain factor of an E-DPDCH is calculated by the
information for rate matching of data, which is encoded comfollowing equation (Equation (2)) when the total transmit
patibly with channel characteristics of an E-DCH, to a rate
power exceeds the maximum allowed power.
matcher 710 comprising a HARQ buffer and transmits
[3e [3e,o,.ix 10(~’~t/1 °)
HARQ information 702 for setting gain factors for initial
transmission and retransmission to a physical channel trans- 35
wherein Aoff~et denotes the gain offset which can be set
mission controller 706.
through signaling of an upper layer.
The physical channel transmission controller 706 sets
FIG. 9 illustrates procedures of setting transmit powers of
parameters necessary for physical channel transmission. Spephysical layers of a UE in accordance with the second
cifically, the physical channel transmission controller 706
resets a new gain factor [3~ with information 702 representing 4o embodiment of the present invention.
Referring to FIG. 9, in step 621, a UE detects a transmisinitial transmission!retransmission received from the HARQ
sion request of E-DPDCH/DPDCH/DPCCH data, compriscontroller 726, power parameters P ...... P~ o~.i 704 and gain
factors [3~,o~.i, [3~, [3a 705 received from the TFC selector 701 ing gain factors of the respective channels. In step 622, the UE
having detected the transmission request estimates total
according to the procedures shown in FIG. 6.
If a DCH, that is, control information for the DPDCH is 45 transmit power P~ using the gain factors of the channels to be
transmitted. That is, the UE measures its transmit power in
received, a DPCCH generator 719 generates the control inforevery time slot in order to check its power condition. The UE
mation into a DPCCH frame, and a coding block 720 encodes
estimates the total transmit power P~ of channels to be transthe DPCCH frame. The encoded data is modulated by a
mitted based on the measured transmit power and using given
modulator 721, is spread by a channelization code C~ of the
DPCCH in a spreader 708, is multiplied by a gain factor [3~ of 5o gain factors required for next transmission.
The UE checks if the total transmit power P~ exceeds the
the DPCCH in a gain scaler 722, and then is transmitted to a
maximum allowed power P ..... in step 622. If the total transmultiplexer 723.
mit power does not exceed the maximum allowed power, the
If data to be transmitted through the DCH and the E-DCH
UE proceeds to step 626 to transmit the data through each
is received, an E-DPDCH generator 703 and a DPDCH generator 714 generate the data into a DCH frame and an E-DCH 55 relevant channel while using the gain factors.
frame according to TFC information selected TF by TF in the
If the total transmit power exceeds the maximum allowed
TFC selector 701, respectively, and coding blocks 709, 715
power, the UE checks whether E-DCH data to be transmitted
encode the DCH frame and the E-DCH frame, respectively.
through the E-DPDCH corresponds to initial transmission
The DPDCH data encoded in the coding block 715 is modudata or retransmission data. If the E-DCH data is determined
lated by a modulator 716, is spread by a channelization code 6o to be initially transmitted, the UE equally scales powers of all
Ca of the DPDCH in a spreader 717, is multiplied by a gain
the channels while keeping power ratios between the chanfactor [3a of the DPDCH in a gain scaler 718, and then is
nels constant in step 624. In another embodiment, the UE may
transmitted to the multiplexer 723.
defer transmission of a channel having lower priority accordThe E-DPDCH frame generated in the E-DPDCH generaing to priorities of the DCH-data and the E-DCH data and
tor 703 is also encoded in a coding block 709 and then is 65 select gain factors in a conventional manner for the other
transmitted to the rate matcher 710. The rate matcher 710
channels or may set transmit power for an channel having
performs rate matching of the encoded E-DPDCH data under
higher priority before anything else and then set powers for

APLNDC-WH-A 0000015639

US 7,447,516 B2
11

12

the other channels such that the total transmit power does not
larger index value TFs have, the more data they can transmit.
exceed the maximum allowed power.
Tables 5 and 6 assume that the DCH and the E-DCH are
mapped to and transmitted through different physical chanIf the E-DCH data is to be retransmitted, the UE derives the
gain factor of the E-DPDCH again and scales only the power
nels from each other. If the DCH and the E-DCH are mapped
of the E-DPDCH in step 625. At this time, the gain factor is 5 to and transmitted through the same physical channel, gain
factors are set according to the respective TFCs.
reduced by a predetermined gain offset as shown in Equation
(2). After the completion of step 624 or 625, the UE proceeds
For the purpose of conciseness, scheduling operations necto step 626 to transmit the relevant data through the channels
essary for the E-DCH will not be described and it is assumed
using the gain factor of the E-DPDCH and the gain factors of
that resources are so assigned as to enable the E-DCH to be
the other channels.
10 transmitted in this embodiment.
A transmitter unit of the UE according to the second
When the DCH and the E-DCH are mapped to different
embodiment is similar to that shown in FIG. 8 and thus will be
physical channels from each other, total transmit power availdescribed with reference to FIG. 8. Here, since the transmitter
able to a UE becomes the sum of transmit powers of all
unit has the same construction as that in FIG. 8 except for the
physical channels and thus the UE sets a transmittable TFC in
physical channel transmission controller 706, the HARQ 15 consideration ofthe transmit powers ofthe physical channels.
controller 726 and the rate matcher 710, a detailed description
of the overall transmitter unit will be omitted.
TABLE 5
The physical channel transmission controller 706 functions to reset the gain factor of the E-DPDCH and set paramExample of TF setting of DCH
eters necessary for physical channel transmission. To be spe- 20
TFI
TF
Gain t~actor
cific, when the total transmit power P~,o,, exceeds the
maximum allowed power P ...... the physical channel trans0
0xl00
beta0
1
lx100
beta1
mission controller 706 derives the new gain factor [3e using
2
2x100
beta2
information 702 representing initial transmission!retransmis3
3x100
beta3
sion received from the HARQ controller 726, power param- 25
eters P ...... P~,o~.i 704 and gain factors [3e,o~, [3c, [3d 705
received from the TFC selector 701 according to the procedures shown in FIG. 7.
TABLE 6
When the total transmit power still exceeds the maximum
Example of TF setting of E-DCH
allowed power even after the gain factor of the E-DPDCH has 30
been scaled, transmit powers of the other channels are scaledTFI
E-TF
Gain t~actor
down while power ratios between the channels are kept con0
0x300
beta4
stant. Also, in a case where information representing that a
1
lx300
beta5
power ratio of the E-DPDCH has been scaled is required in
2
2x300
beta6
view of a receiver structure of a Node B scheduler, the UE 35
may signal information indicating that the power ratio off the
If E-DCH data to be retransmitted exists, the UE sets the
E-DPDCH has been scaled to the Node B by physical layer
signaling. In this case, the physical layer signaling for indi- same E-TF as that of the initial transmission because there
may occur a case where the DCH has a higher priority than the
cating that the power ratio of the E-DPDCH has been scaled
may be performed using a 1-bit or 2-bit identifier as described 4o E-DCH at the time ofretransmission and thus the same E-TF
as that at the initial transmission is no selected. Such a case
in the first embodiment of the present invention.

may arise due to channel conditions or scheduling.
Hereinafter a detailed description will be given for this
embodiment.
In a third embodiment of the present invention, a UE scales 45 The UE compares an E-TF of initial transmission with an
powers of the entire channels by selecting a gain factor of an
E-TF of retransmission. Ifa result of comparison proves that
E-DPDCH such that total transmit power does not exceed the
an E-TF index of initial transmission is smaller than or equal
maximum allowed power in consideration of retransmission.
to that ofretransmission, the UE determines that it is possible
According to this third embodiment of the present invention,
to sufficiently support the E-TF of initial transmission, and
a gain factor is selected in a different manner from that of 5o selects the E-TF of initial transmission and a gain factor
initial setting in TFC selection procedures when a DCH
corresponding thereto. However, if the E-TF index of initial
occurs at a point of time ofretransmission differently from at
transmission is larger than that of retransmission, the UE
initial transmission.
selects the same E-TF as that of initial transmission and a new
In particular, the UE checks transmit power on a slot unit
gain factor scaled for transmission. An example of setting a
basis for a plurality of channels to be transmitted and reduces 55 gain factor according to Table 6 is shown below in Table 7.
EXAMPLE 3

the transmit power of a specific channel step by step according to priorities of the channels. The priority may be determined by whether the relevant channel is a channel, retransmission of which is ensured, a control channel or the like.
To facilitate understanding of this embodiment, an exem- 60
plary transmission environment will be described first.
In a transmission environment according to this embodiment, one DCH and one E-DCH are set simultaneously and a
possible TFC of each channel is set as shown below in Tables
E-TF
5 and 6. Since the DCH is one, the TFC actually comprises a 65 Gain factor
TF Set (TFS) comprising TFs and the TF of the E-DCH is
designated by E-TF in Table 6. As shown in Tables 5 and 6, the

TABLE 7
Example of setting gain t~actor in Example 3

Initial
traa~smission

TF of E-DCH
traalsmittable at time
point of
retraa~smission

Final result of
TFC selection at
retraa~smission

2
beta6

1
beta5

2
beta5

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14

Referring to Tables 6 and 7, if an E-TF 2 is selected at
(TF-initial) and a gain factor (gain factor (TF_initial)) correinitial transmission, the UE transmits (2x300)-bit data using
sponding thereto in step 813. In contrast with this, if the index
gain factor~eta6. If DCH-data exists and thus the amount of
of the initial transmission E-TF (TF_initial) is larger than that
data which the UE can transmit through the E-DCH is limited
of the retransmission E-TF (TF-re), the UE selects the initial
to an E-TF 1 at a point of time of retransmission, the UE 5 transmission E-TF as a new TF (TF_new) and selects a gain
selects a TFC for the DCH from among allowable TFCs and
factor (gain factor (TF_re)) of the retransmission E-TF as a
selects an E-TF of the E-DCH which can be transmitted using
new gain factor in step 814. Afterward, in step 815, the UE
the remaining power, as a result of which an E-TF 1 and a
transmits the DCH data and the E-DCH data using the E-TF,
gain facto~beta5 are selected. Since the E-TF 2 of initial the TFC and the gain factors which have been selected in steps
transmission is larger than the E-TF 1 ofretransmission, an 10 802 to 814, respectively.
E-TF_new 2 and a gain factor~eta5 are selected for the
FIG. 11 illustrates a transmitter unit ofa UE in accordance
E-DCH at retransmission.
with the third embodiment of the present invention. Here, the
Hereinafter, a description will be given for a process of
UE uses a DPCCH, a DPDCH, an E-DPDCH and an
selecting a TFC in the above-mentioned channel setting enviE-DPCCH as uplink channels. However, a construction
ronment according to the third embodiment of the present 15 related to the E-DPCCH is omitted for convenience of explainvention with reference to FIG. 10. In this embodiment, it is
nation.
assumed that a TTI ofa DCH is the same as that of an E-DCH
Referring to FIG. 11, a TFC selector 901 determines TFs of
and thus TFC selection can be always performed at the same
the channels. The TFC selector 901 is suppliedwith estimated
point of time. If points of time of TFC selection for the DCH
total transmit power P~ information 902 and maximum
and the E-DCH are different from each other or it is impos- 20 allowed power P ..... information 903, and receives HARQ
sible to perform TFC selection at the same point of time
information 904 representing initial transmission!retransmisbecause TTIs of both the channels are different from each
sion from an HARQ controller 913. The TFC selector 901
other, TFC selection for a channel having higher priority is
performs the procedures shown in FIG. 10 to determine a
performed first and then TFCs are selected for the other
TFC, an E-TF and gain factors, and transmits information 905
channels using the remaining power.
25 on the determined TFC, E-TF and gain factors to a physical
FIG. 10 illustrates procedures of selecting a TFC in accorchannel transmission controller 906. The physical channel
dance with the third embodiment of the present invention.
transmission controller 906 sets the gain factors 907 to gain
Referring to FIG. 10, in step 802, a UE checks ifDCH data
scalers 926,921,916 corresponding to the relevant channels.
and E-DCH data exist.
Ifa DCH, that is, control information 908 for the DPDCH
If the checking proves that only the DCH data exists, the 30 is received, a DPCCH generator 922 generates the control
UE selects a TFC for the DCH from among allowable TFCs
information 908 into a DPCCH frame, and a coding block 923
through an ordinary TFC selection process in step 804. If only
encodes the DPCCH frame. The encoded data is modulated
the E-DCH data exists, the UE selects an E-TF of the E-DCH
by a modulator 924, is spread by a channelization code CC of
within an transmittable data rate in step 803.
the DPCCH in a spreader 925, is multiplied by a gain factor
If the checking proves that both the DCH and E-DCH data 35 of the DPCCH in the gain scaler 926, and then is transmitted
exist, the UE compares the priority of the E-DCH (P_EDCH)
to a multiplexer 927.
with that of the DCH (P_DCH) in step 805.
If data 909 to be transmitted through the DCH and the
If the comparison proves that the priority of the DCH
E-DCH is received, an E-DPDCH generator 910 and a
(P-DCH) is greater than that of the E-DCH, the UE selects
DPDCH generator 917 generate the data 909 into a DPDCH
first a TFC necessary for transmission of the DCH data from 40 frame and an E-DPDCH frame according to TFC information
among allowable TFCs in step 806, proceeds to step 808 to
selected TF by TF in the TFC selector 901, respectively, and
select an E-TF for transmitting data through the E-DCH
coding blocks 918, 911 encode the DPDCH frame and the
within the remaining power exclusive of the power which has
E-DPDCH frame, respectively. The DPDCH data encoded in
been allocated to the TFC selected for the DCH, and then
the coding block 918 is modulated by a modulator 919, is
proceeds to step 810.
45 delivered to a spreader 920 to be spread by a channelization
On the contrary, if the priority of the E-DCH (P_EDCH) is
code Ca of the DPDCH, is multiplied by a gain factor [3d of the
higher than that of the DCH, the UE selects first an E-TF for
DPDCH in the gain scaler 921, and then is transmitted to the
the E-DCH from among allowable E-TFs in step 807, promultiplexer 927.
ceeds to step 809 to select a TFC for transmission of the DCH
The E-DPDCH data encoded in a coding block 911 is
data within remaining power exclusive of power which has 50 transmitted to a rate matcher 912. The rate matcher 912 performs rate matching of the encoded E-DPDCH data under the
been allocated to the E-TF selected for the E-DCH, and then
proceeds to step 810. In another embodiment, when both the
control of the HARQ controller 913. The rate-matched data is
E-DCH data and the DCH data exist, the UE may defer
modulated by a modulator 914, is spread by a channelization
transmission of one channel according to priorities of the two
code Ce of the E-DPDCH in a spreader 915, is multiplied by
channels, select a TF for the other channel in a conventional 55 the gain factor [3e ofthe E-DPDCH set by the physical channel
manner, and then proceed to step 815.
transmission controller 906 in a gain scaler 916, and then is
In step 810, the UE determines whether the E-DCH data is
transmitted to the multiplexer 927.
to be initially transmitted or retransmitted. If the E-DCH data
The data from the gain scalers 926, 921, 916 are multiis determined to be initially transmitted, the UE transmits the
plexed in the multiplexer 927, is input into a scrambler 928 to
E-DCH data through the selected E-TF in step 815. In con- 60 be scrambled by a scrambling code Sdp~,,,,,, and then is RFconverted and transmitted through an RF unit 929.
trast with this, if the E-DCH data is determined to be retransmitted, the UE proceeds to step 811 to compare an E-TF
EXAMPLE 4
(TF_initial) selected at initial transmission with the E-TF
(i.e., TF_re) selected in step 803,807 or 808.
If an index of the initial transmission E-TF (TF_initial) is 65 In a fourth embodiment of the present invention, the transsmaller than or equal to that of the retransmission E-TF (TFmit power of an E-DPDCH is preferentially reduced when the
re) in step 812, the UE selects the initial transmission E-TF
total transmit power of an UE exceeds the maximum allowed

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16

power. According to this fourth embodiment of the present
which causes the total transmit power P~ not to exceed the
invention, the UE performs an operation for recalculating a
maximum allowed power P ..... . Such a gain factor can be
gain factor of an E-DCH such that the total transmit power
derived in the same manner as that presented in Equation (1).
does not exceed the maximum allowed power every unit of As another example, the UE may reduce the gain factor of the
power control, that is, on a slot-by-slot basis, and resets the 5 E-DPDCH by a predetermined gain offset as in Equation (2).
The gain factor is derived, and then the UE proceeds to step
gain factor of the E-DCH anytime irrespective of whether
E-DCH data is initially transmitted or retransmitted when the
1304.
total transmit power exceeds the maximum allowed power.
In step 1304, the UE compares again the total transmit
This is because the total transmit power of the UE is conpower to which the derived gain factor is applied with the
trolled by a Transmit Power Control (TPC) command which 10 maximum allowed power. At this time, P~’ signifies total
is received from a Node B from slot to slot. Specifically, the
transmit power to which the new [3e derived in step 1303 is
TPC command is applied to power adjustment of a DPCCH.
applied. If the total transmit power still exceeds the maximum
Since a power ratio of a DPDCH/E-DPDCH/E-DPCCH relaallowed power, the UE proceeds to step 1305. Here, in a case
tive to the DPDCH is maintained by a gain factor of the
of using Equation (2), the UE may repeat step 1303 while
relevant channel, the TPC command is related to the total 15 decreasing the gain factor of the E-DPDCH step by step until
transmit power of the UE.
the total transmit power does not exceed the maximum
FIG. 12 illustrates an example in which whether or not total
allowed power.
transmit power exceeds the maximum allowed power is
If a result of comparison in step 1304 proves that the
checked on a slot-by-slot basis and only the transmit power of
transmit power of the E-DPDCH, that is, updated transmit
an E-DPDCH, to which an E-DCH is mapped, is scaled when 2o power to which the gain factor calculated in step 1303 is
the total transmit power exceeds the maximum allowed
applied becomes a possible minimum value, for example, 0
power. Since an E-DPCCH carries control information for
and so the E-DPDCH cannot be transmitted, but still the total
demodulating and decoding the E-DPDCH, its reliability
transmit power exceeds the maximum allowed power, this
must be ensured. Thus, a power ratio 800 of the E-DPCCH is
may be regarded as a situation where the UE is short of power
maintained even when the transmit power of the E-DPDCH is 25 resources and the UE proceeds to step 1305. In step 1305,
scaled.
gain factors of the other channels (E-DPCCH/DPDCHJDReferring to FIG. 12, a TPC command continues to indiPCCH) are derived such that the total transmit power can be
cate power-up (UP) within one TTI, so that total transmit
reduced while power ratios of the other channels are mainpower exceeds the maximum allowed power. Reference
tained. That is, in step 1305, power ratios between the
numeral ’802’ designates transmit power setting according to 30 DPCCH and the E-DPCCH, between the DPCCH and the
a prior art, in which if the total transmit power reaches the
DPDCH, and between the DPCCH and the E-DPCCH
maximum allowed power, transmit powers of all channels are
remains constant. The above-mentioned steps are performed
equally scaled down in spite of the TPC command continuing
every slot. Since the E-DPCCH is transmitted while mainto indicate UR Reference numeral ’804’ designates transmit taining its reliability even in a slot in which the E-DPDCH is
power setting according to the fourth embodiment of the 35 not transmitted, the E-DPCCH is transmitted with transmit
present invention, in which if the TPS command indicating
power which is reduced on the same scale of that of other
UP is continually received after the total transmit power has
channels.
reached the maximum allowed power, only the transmit
In step 1306, the UE transmits E-DPDCH/DPDCH/
power of an E-DPDCH is scaled down and transmit powers of
DPCCH/E-DPCCH data with transmit powers according to
the other channels (DPDCH/E-DPCCH/DPCCH) are equally 4o the derived gain factors.
scaled up while predetermined power ratios are maintained.
FIG. 14 illustrates a transmitter unit ofa UE in accordance
When the transmit power of the E-DPDCH is scaled down,
with the fourth embodiment of the present invention. In FIG.
but still the total transmit power still exceeds the maximum
14, the transmitter unit is constructed such that the UE perallowed power, the operation of scaling the transmit power of
forms DPDCH/DPCCH/E-DPDCH/E-DPCCH transmisthe E-DPDCH may be repeated. At this time, when the trans- 45 sion. In the transmitter unit, the same parts as those explained
mit power of the E-DCPDCH becomes a predetermined miniin connection with FIGS. 8 and 11, that is, DPCCH/DPDCH/
mum value, for example, 0, the E-DPDCH is not transmitted.
E-DPDCH generators 1413, 1414, 1415, 1404, rate matcher
Nevertheless, if the total transmit power still exceeds the
1420, HARQ controller 1407, coding blocks 1417, 1418,
maximum allowed power, transmit powers of the other
1419, 1416, modulators 1422, 1423, 1424, 1425, spreaders
respective channels are scaled-down while power ratios of the 5o 1426, 1427, 1428, 1429, gain scalers 1430,1431, 1432, 1433,
channels are maintained.
a channel multiplexer 1434 and a scrambler 1435 will not be
Hereinafter, a detailed description will be given for procedescribed and only parts directly related to the fourth embodidures of setting transmit power ofa UE in accordance with the
ment of the present invention will be described below.
fourth embodiment of the present invention with reference to
A TFC selector 1401 selects TFC for E-DCH data (1402)
55 and DCH data (1403), and delivers gain factors 1405 correFIG. 13.
Referring to FIG. 13, in step 1301, a physical layer ofa UE
sponding to the TFC, that is, [3e,o~, [3~c, [3c and [3d to a physical
channel transmission controller 1408. The physical channel
checks if the transmission time of an E-DPDCH, a DPDCH,
a DPCCH or an E-DPCCH has arrived from each slot. If the
transmission controller 1408 also receives information on the
transmission time of the physical channels has arrived, the UE
maximum allowed power 1405. A power amp controller 1409
compares total transmit power P~ of the physical channels 6o controls a power amp 1412 using power offset Po2~t accordwith the predetermined maximum allowed power P ..... . Here,
ing to a TPC command received from a Node B every slot, and
the total transmit power is transmit power which is estimated
delivers estimated transmit power (P_est) 1410, which is
according to a TPC command received from a Node B.
estimated according to the TPC command, as total transmit
If a result of comparison proves that the total transmit
power P~ to the physical channel transmission controller
power P~ exceeds the maximum allowed power P ...... the UE 65 1408. The physical channel transmission controller 1408
proceeds to step 1303. At this time, P~ becomes P~,o~, in
resets the gain factors of the respective channels using the
Equation (1). The UE derives a gain factor of the E-DPDCH
total transmit power 1410 according to the procedures in FIG.

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18

according to the TPC command, to the physical channel
13, and provided the reset gain factors [3c, [3d, [3ec and [3e to the
gain scalers 1430, 1431, 1432, 1433.
transmission controller 1508 in a predetermined specific slot.
In the fourth embodiment of the present invention, the
The physical channel transmission controller 1508
transmit power P_est is provided from the power amp conreceives the P_est0 1510 at the specific slot to derive gain
troller 1409 every slot when the gain factor of the E-DPDCH 5 factors 1543 of the respective channels and provide them to
is recalculated slot by slot such that the total transmit power
the gain scalers 1530, 1531, 1532, 1533. In particular, the
does not exceed the maximum allowed power. However, in
physical channel transmission controller 1508 estimates posview of a structure of the UE in which a RF unit is partitioned
sible P_estk_up/down (k=l, 2,..., 2(x-~)) for the other slots
from a modem, it may be impossible that the physical channel
exclusive of the specific slot and calculates all possible gain
transmission controller 1408 is provided with the total trans- 10 factors of the E-DPDCH t%~up, lg~ao,~,, for the estimated
mit power from the power amp controller 1409 every slot.
P_estk_up/down. After has calculated all the possible gain
Therefore, to solve such a problem, another example of a
factors, the physical channel transmission controller 1508
transmitter unit according to the fourth embodiment of the
receives a TPC command every k-th slot following the spepresent invention is shown in FIG. 15.
cific slot to deliver the corresponding gain factor ~up or
In this modified fourth embodiment, a power amp control- 15 t~& dow, to the gain scaler 1533 of the E-DPDCH. Transmit
ler 1509 delivers P_est to a physical channel transmission
powers of the other channels except the E-DPDCH may be
controller 1508 not every slot but every predetermined speequally scaled by the power amp 1512.
cific slot. In this case, since the physical channel transmission
EXAMPLE 5
controller 1508 cannot exactly know P_est in the other slots
except the specific slot, it estimates all possible P_est values 20
In a fifth embodiment of the present invention, when the
for the specific slot and the other slots, and calculates gain
total transmit power of a UE exceeds the maximum allowed
factors of the E-DPDCH for the estimated P_est values. Here,
power, the power of an E-DPDCH is preferentially reduced
the P_est values of the other slots is derived by adding or
and then powers of the other channels are successively
subtracting a power control unit value according to a TPC
(hereinafter referred to as ’Delta’) to or from the P_est value 25 reduced in the order from lower channel priority to higher
channel priority.
of the specific slot.
It is assumed that a DPDCH, a DPCCH, an E-DPDCH and
To give an example, in a case where P-est is delivered every
an E-DPCCH exist. To set channel-by-channel priority,
two slots, gain factors to be estimated are as follows:
whether or not the relevant channel supports retransmission is
1st slot: P_est0~t%o
2,’d slot: When TPC UP is received, P_estl_up=P_est0+ ~0 considered first and then whether or not the relevant channel
Delta =~1%1 up
is a control channel is considered. In this case, the charmelby-channel priority may be set in the order of DPCCH/EWhen TPC DOWN is received, P estl down P_est0DPCCH/DPDCH/E-DPDCH. Also, when whether or not the
Delta ~tg~l ~o,~,
relevant channel is a control channel is considered first and
In the above example, the UE is received P_est0 every two
slots and performs the procedures in FIG. 13 based on the ~5 then whether or not the relevant channel supports retransmisP_est0 to calculate a gain factor of the E-DPDCH ~o, and
sion is considered is considered, the channel-by-channel priority may be set in the order of DPCCH/DPDCH/E-DPCCH/
then calculate a gain factor for a next slot according to estiE-DPDCH.
mated total transmit power ~el of the next slot. At this time,
Hereinafter, by way of example, a description will be given
for the cases where a TPC command of UP is received and a
TPC command of DOWN is received, ~i up and ~i ~o,~,
4o for a case where the channel-by-channel priority is set in the
order of DPCCH/E-DPCCH/DPDCH/E-DPDCH. When
are all derived.
In this manner, the physical channel transmission controltotal transmit power of a UE exceeds the maximum allowed
ler 1508 previously calculates three t% values, and selects and
power, the UE adjusts transmit power of the E-DPDCH having the lowest priority using a gain factor or a power offset
applies one of the three ~1~ values based on the received TPC
command in each slot.
45 value and does not perform power adjustment for the other
channel.
In a case where P_est0 is delivered from the power amp
controller 1509 every ’K’ slots, the number M of estimated
When the transmit power of the E-DPDCH is set to a
gain factors of the other slots becomes 2(k-~).
predetermined minimum value, e.g., 0, but still the total transIn FIG. 15, the same parts as those explained in connection
mit power of the UE exceeds the maximum allowed power,
with FIGS. 8 and 11, that is, DPCCH/DPDCH/E-DPDCH 5o transmit power of the E-DPCCH is adjusted and power
generators 1513, 1514, 1515, 1504, rate matcher 1520,
adjustment is not performed for the other channels. At this
HARQ controller 1507, coding blocks 1517, 1518, 1519,
time, since the E-DPCCH carries control information indis1516, modulators 1522, 1523, 1524, 1525, spreaders 1526,
pensable for demodulation and decoding of the E-DPDCH,
1527, 1528, 1529, gain scalers 1530, 1531, 1532, 1533, a
the E-DPCCH is adjusted such that predetermined minimum
channel multiplexer 1534 and a scrambler 1535 will not be 55 power (not 0) for the E-DPCCH is maintained. Similarly, if
described and only parts directly related to the modified
the total transmit power of the UE still exceeds the maximum
fourth embodiment of the present invention will be described
allowed power although the transmit power of the E-DPCCH
below.
is set as the minimum power, power adjustments are succesA TFC selector 1501 selects TFC for E-DCH data 1502 and
sively performed for the other channels, that is, the DPCCH
DCH data 1503, and delivers gain factors 1505 corresponding 6o and the DPDCH such that their predetermined minimum
powers are maintained.
to the TFC, that is, [3e,o~,, [3~, [3~ to a physical channel transmission controller 1508. The physical channel transmission
controller 1508 also receives information on the maximum
EXAMPLE 6
allowed power (P,~,ax) 1506. A power amp controller 1509
controls a power amp 1512 according to a TPC command 65 In a sixth embodiment of the present invention, when
received from a Node B every slot, and delivers estimated
checking for total transmit power ofa UE proves that the total
total transmit power (P_est0) 1510, which is estimated
transmit power exceeds the maximum allowed power, trans-

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21)

mit power of an E-DPDCH is scaled down in the unit of a
minimum TTI. The transmit power of the E-DPDCH can be
scaled down by scaling a gain factor of the E-DPDCH.
Although the transmit power of the E-DPDCH has been
scaled down in the unit of a minimum TTI, the total transmit
power may exceed the maximum allowed power due to power
control occurring in the unit of a slot. In this case, transmit
powers of all channels are equally scaled down such that the
total transmit power does not exceed the maximum allowed
power while power ratios between the channels are maintained. Here, the channels comprise the E-DPDCH and signifies a DPDCH, a DPCCH, an E-DPCCH and the like.
Specifically, when an E-DPDCH is set at a TTI of 2 ms or
10 ms and a DPDCH which is transmitted at a TTI of 10 ms
or more exists, a UE checks total transmit power in the unit of
a minimum TTI of the E-DPDCH, that is, in the unit of 2 ms
and scales transmit power of the E-DPDCH in the unit of 2
ms. If 15 slots exist in a TTI of 10 ms and 3 slots exist in a TTI
of 2 ms, the UE scales the transmit power of the E-DPDCH in
the unit of 2 ms and then scales the total transmit power in the
unit of each slot in consideration of power control.
Detailed procedures performed by the UE which operates
as stated above are the same as in the fourth embodiment, but
it is preferred that a cycle of performing the operation is set in
the unit of a minimum TTI, in particular, a minimum TTI of an
E-DPDCH, instead of in the unit of a slot.
As described above, when data transmitted through a DCH
occurs during a packet service through an E-DCH and thus
total transmit power exceeds the maximum allowed power, a
method and an apparatus according to this embodiment of the
present invention scales down only the transmit power of an
E-DPDCH having lower priority, thereby ensuring transmission qualities of other channels having higher priority and
making it possible to efficiently use transmit power of an UE.
While the invention has been shown and described with
reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form
and details may be made therein without departing from the
spirit and scope of the invention as defined by the appended
claims.

transmit power factor for the second channel is scaled down
below a predetermined minimum value.
5. The method as claimed in claim 4, wherein the predetermined minimum value indicates a status where the second
5 channel is not transmitted.
6. The method as claimed in claim 1, further comprising the
step of equally scaling transmit power factors for the other
channels exclusive of the second channel if the total transmit
power still exceeds the maximum allowed power even after
10 the transmit power factor for the second channel has been
scaled-down.
7. The method as claimed in claim 1, further comprising the
step of successively scaling transmit power factors for the
other channels exclusive of the second channel according to
15 channel-by-channel priority if the total transmit power still
exceeds the maximum allowed power even after the transmit
power factor for the second channel has been scaled.
8. The method as claimed in claim 7, wherein the channelby-channel priority is given such that a channel not support2o ing retransmission has relatively lower priority than that of a
channel supporting retransmission, and a channel carrying
data has relatively lower priority than that of a channel carrying control information.
9. The method as claimed in claim 1, wherein in the scaling
25 step, the transmit power factor for the second channel is
scaled when data of the second channel to be transmitted is
retransmission data.
10. The method as claimed in claim 1, wherein when data
of the second channel to be transmitted is initial transmission
3o data, transmit power factors for all the channels comprising
the second channel are equally scaled such that the total
transmit power does not exceed the maximum allowed power.
11. The method as claimed in claim 1, wherein when data
of the second channel to be transmitted is initial transmission
35 data, transmit power factors for all the channels comprising
the second channel is successively scaled according to predetermined channel-by-channel priority such that the total
transmit power does not exceed the maximum allowed power.
12. The method as claimed in claim 11, wherein the chan4o nel-by-channel priority is given such that a channel not supporting retransmission has relatively lower priority than that
What is claimed is:
of a channel supporting retransmission, and a channel carry1. A method for transmitting data of a first channel not
ing data has relatively lower priority than that of a channel
supporting Hybrid Automatic Retransmission Request
carrying control information.
(HARQ) and a second channel supporting the HARQ in a 45
13. The method as claimed in claim 11, wherein the scaling
mobile telecommunication system which supports an
step comprises the sub-steps of:
enhanced uplink service, the method comprising the steps of:
acquiring total transmit power in a specific slot, the total
determining transmit power factors for the channels and
transmit power being estimated according to a TPC
determining if total transmit power required for transcommand received from a Node B;
mission of the channels exceeds the maximum allowed5o
deriving a first transmit power factor for the second chanpower;
nel, the first transmit power factor causing the estimated
scaling-down the transmit power factor for the second
total transmit power not to exceed the maximum allowed
channel if the total transmit power exceeds the maxipower;
mum allowed power; and
providing the first transmit power factor as the scaled transtransmitting data through the first and second channels 55
mit power factor for the specific slot;
using the scaled-down transmit power factor for the
deriving a total transmit power value increased by a predesecond channel and the transmit power factor for the first
termined power control unit value and a total transmit
channel.
power value decreased by the predetermined power con2. The method as claimed in claim 1, wherein the scaling
trol unit value using the estimated total transmit power
step is performed on a slot-by-slot basis.
6o
for at least a next slot following the specific slot, and
3. The method as claimed in claim 1, wherein the total
deriving second transmit power factors for the second
transmit power is determined based on the transmit power
channel corresponding to the increased total transmit
factors for the first and second channels and a Transmit Power
power value and the decreased total transmit power
Control (TPC) command issued by the system.
value, the second transmit power factors causing the
4. The method as claimed in claim 1, further comprising the 65
increased total transmit power value and the decreased
step of equally scaling transmit power factors corresponding
total transmit power value not to exceed the maximum
to the other channels comprising the first channel when the
allowed power, respectively;

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US 7,447,516 B2
21

22

receiving a TPC command in at least the next slot and
22. The apparatus as claimed in claim 21, wherein the
selecting one of the second transmit power factors
channel-by-channel priority is given such that a channel not
according to whether the received TPC command repsupporting retransmission has relatively lower priority than
that of a channel supporting retransmission, and a channel
resents UP or DOWN; and
providing the selected second transmit power factor as the 5 carrying data has relatively lower priority than that of a channel carrying control information.
scaled transmit power factor for at least the next slot.
23. The apparatus as claimed in claim 15, wherein the
14. The method as claimed in claim 1, wherein the transmit
controller scales the transmit power factor for the second
power factors are determined based on Transport Formats
channel when data of the second channel to be transmitted is
(TF) which are selected according to scheduling assignment
10 retransmission data.
information received from a Node B, respectively.
24. The apparatus as claimed in claim 15, wherein when
15. An apparatus for transmitting data of a first channel not
data of the second channel to be transmitted is initial transsupporting Hybrid Automatic Repeat reQuest (HARQ) and a
mission data, the controller equally scales transmit power
second channel supporting the HARQ in a mobile telecomfactors for all the channels comprising the second channel
munication system which supports an enhanced uplink ser15 such that the total transmit power does not exceed the maxivice, the apparatus comprising:
mum allowed power.
a controller for determining transmit power factors for the
25. The apparatus as claimed in claim 15, wherein when
channels, determining if total transmit power required
data of the second channel to be transmitted is initial transfor transmission of the channels exceeds the maximum
mission data, the controller successively scales transmit
allowed power, and scaling down the transmit power
2o power factors for all the channels comprising the second
factor for the second channel if the total transmit power
channel according to predetermined channel-by-channel priexceeds the maximum allowed power;
ority such that the total transmit power does not exceed the
first and second channel generators for generating first and
maximum allowed power.
second data frames by performing channel-coding and
26. The apparatus as claimed in claim 25, wherein the
modulation of the first and second channel data; and
25 channel-by-channel priority is given such that a channel not
a gain scaling unit for adjusting the transmit powers of the
supporting retransmission has relatively lower priority than
first and second channels, with which the data frames of
that of a channel supporting retransmission, and a channel
the first and second channels is transmitted, using the
carrying data has relatively lower priority than that of a chanscaled transit power factor for the second channel and
nel carrying control information.
the transmit power factor for the first channel.
30 27. The apparatus as claimed in claim 15, wherein the
16. The apparatus as claimed in claim 15, wherein the
controller acquires total transmit power, which is estimated
controller scales the transmit power factor for the second
according to a TPC command received from a Node B, in a
channel from slot to slot when the total transmit power
specific slot, derives a first transmit power factor for the
exceeds the maximum allowed power.
second channel, which causes the estimated total transmit
17. The apparatus as claimed in claim 15, wherein the 35 power not to exceed the maximum allowed power, provides
controller determines the total transmit power based on the
the first transmit power factor as the scaled transmit power
transmit power factors for the first and second channels and a
factor for the specific slot, derives a total transmit power value
TPC command issued by the system.
increased by a predetermined power control unit value and a
18. The apparatus as claimed in claim 15, wherein the
total transmit power value decreased by the predetermined
controller equally scales transmit power factors correspond- 40 power control unit value using the estimated total transmit
ing to the other channels comprising the first channel when
power for at least a next slot following the specific slot,
derives second transmit power factors for the second channel,
the transmit power factor for the second channel is scaleddown below a predetermined minimum value.
which correspond to the increased total transmit power value
and the decreased total transmit power value and cause the
19. The apparatus as claimed in claim 18, wherein the
predetermined minimum value indicates a status where the 45 increased total transmit power value and the decreased total
transmit power value not to exceed the maximum allowed
second channel is not transmitted.
power, respectively, receives a TPC command in at least the
20. The apparatus as claimed in claim 15, wherein the
next slot, selects one of the second transmit power factors
controller equally scales transmit power factors for the other
according to whether the received TPC command represents
channels exclusive of the second channel if the total transmit
power still exceeds the maximum allowed power even after 50 UP or DOWN, and provides the selected second transmit
power factor as the scaled transmit power factor for at least
the transmit power factor for the second channel has been
the next slot.
scaled.
28. The apparatus as claimed in claim 15, wherein the
21. The apparatus as claimed in claim 15, wherein the
transmit power factors are determined based on Transport
controller successively scales transmit power factors for the
55 Formats (TF) which are selected according to scheduling
other channels exclusive of the second channel according to
assignment information received from a Node B, respecchannel-by-channel priority if the total transmit power still
tively.
exceeds the maximum allowed power even after the transmit
power factor for the second channel has been scaled.

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