(12) United States Patent
`K0 et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,971,168 B2
`Mar. 3, 2015
`
`US008971 168B2
`
`(54) CARRIERAGGREGATION IN WIRELESS
`COMMUNICATIONS SYSTEMS
`(71) Applicant: Electronics and Telecommunications
`R
`h Institute. Daeieon (KR
`esearch Institute, Daejeon (KR)
`(72) Inventors: Young Jo Ko, Daejeon (KR); Tae Gyun
`Noh, Daejeon (KR); Kyoung Seok Lee,
`Daejeon (KR); Bang Won Seo, Daejeon
`KR): B
`Jang J
`Daei
`(SR). Byung lang Jeong, Daison
`(KR); Heesoo Lee, Daejeon (KR)
`(73) Assignee: Electronics and Telecommunications
`Research Institute, Daejeon (KR)
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`(21) Appl. No.: 14/060,319
`(22) Filed:
`Oct. 22, 2013
`(65)
`Prior Publication Data
`
`(*) Notice:
`
`Feb. 13, 2014
`US 2014/OO43955A1
`Related U.S. Application Data
`(63) Continuation of application No. 13/733,453, filed on
`Jan. 3, 2013, now Pat. No. 8,593.936, which is a
`continuation of application No. 13/441,058, filed on
`Apr. 6, 2012, now Pat. No. 8.363,537, which is a
`continuation
`of
`application
`No.
`PCT/KR2011/000195, filed on Jan. 11, 2011.
`Foreign Application Priority Data
`(30)
`Jan. 11, 2010 (KR) ........................ 10-201O-OOO2231
`Feb. 1, 2010 (KR) ........................ 10-201O-OOO9024
`Feb. 12, 2010 (KR) ........................ 10-201O-OO13352
`Apr. 2, 2010 (KR) ........................ 10-201O-OO30515
`Apr. 9, 2010 (KR) ........................ 10-201O-OO32647
`Aug. 9, 2010 (KR) ........................ 10-201O-OO76337
`s
`Aug. 18, 2010 (KR) ........................ 10-2010-0079742
`Aug 27. 2010 (KR)
`10-2010-0O83363
`Sep 1, 2010 (KR). 10-2010-0O85528
`Sep. 2, 2010 (KR) ........................ 10-2010-0085888
`Nov. 8, 2010 (KR) ........................ 10-201O-O110258
`
`Nov. 9, 2010 (KR) ........................ 10-2010-011 1130
`Nov. 12, 2010 (KR).
`... 10-201O-O112531
`Jan. 11, 2011 (KR) ........................ 10-2011-OOO2855
`(51) Int. Cl
`(KR)
`H04 II/00
`H04L 5/00
`
`(2006.01)
`(2006.01)
`(Continued)
`
`(56)
`
`(52) U.S. Cl.
`CPC ............ H04L5/0001 (2013.01); H04L I/0027
`(2013.01); H04L I/0073 (2013.01);
`(Continued)
`(58) Field of Classification Search
`USPC ...................... 370/203,208,341-349
`See application file for complete search history.
`References Cited
`U.S. PATENT DOCUMENTS
`2004/0066738 A1
`4/2004 Stopler
`2008. O165893 A1
`7/2008 Malladi et al.
`Continued
`(
`)
`FOREIGN PATENT DOCUMENTS
`2003-51.0883
`3, 2003
`2003-110532
`4/2003
`(Continued)
`OTHER PUBLICATIONS
`& 8
`s
`E. SiN Metting #53, “Draft Change Request.” R1-082219,
`pageS,
`(Continued)
`Primary Examiner — Kerri Rose
`(74) Attorney, Agent, or Firm — Nelson Mullins Riley &
`Scarborough LLP, Anthony A. Laurentano, Esq.
`
`JP
`JP
`
`ABSTRACT
`-
`-
`-
`(57) -
`Provided is a data transmission system using a carrier aggre
`ation. The data transmission SVStem mav assign a radio
`3
`y
`y ass1g
`resource based on a correspondence relationship between a
`death s an uplink, and may transmit data using the
`assigned radio resource.
`25 Claims, 13 Drawing Sheets
`
`
`
`
`
`BITSTREAM
`
`
`
`MODULAON
`
`
`
`RS
`
`FFT
`
`BLHO
`
`BLii1
`
`BLH2
`
`BLi3
`
`BLi4
`
`BLES
`
`BLE6
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`US 8,971,168 B2
`Page 2
`
`(2006.01)
`(2006.01)
`(2006.01)
`(2009.01)
`
`(51) Int. Cl.
`H04L I/00
`H04L L/I6
`H04L L/18
`H047 72/04
`52) U.S. C
`(52)
`AV e. we
`CPC ............ H04LI/I614 (2013.01); H04L 1/1671
`(2013.01); H04L 1/1854 (2013.01); H04L
`1/1893 (2013.01); H04L 5/001 (2013.01);
`HO4L 5/OO23 (2013 01); H04L 500ts
`• us
`(2013.01); H04L 5/0055 (2013.01); H04L
`5/0082 (2013.01). H04L 5/0094 (2013.01):
`H04W 72/0406 (2013.01)
`USPC ........................................... 370/208: 370/341
`
`(56)
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`2009 OO46646 A1
`2009,0279493 A1
`2010/O135359 A1
`2010/0172235 A1
`2010/0316146 A1
`2011/O158219 A1*
`2012,0026944 A1*
`2012fO14071.6 A1
`2013,00583O2 A1
`2013/0129013 A1
`
`2/2009 Cho et al.
`11/2009 Gaal et al.
`6, 2010 Nakao et al.
`7, 2010 Liu et al.
`12/2010 McBeath et al.
`6/2011 Ko et al. ....................... 370,344
`2/2012 Yamada et al. ............... 370,328
`6/2012 Baldemair et al.
`3/2013 Kim et al.
`5, 2013 Han et al.
`
`FOREIGN PATENT DOCUMENTS
`
`KR
`WO
`
`102OO90015813
`2008/106317 A1
`
`2, 2009
`9, 2008
`
`WO
`WO
`WO
`
`2009/02O376 A2
`2009/057285 A1
`2011 084038 A2
`
`2, 2009
`5, 2009
`T 2011
`
`OTHER PUBLICATIONS
`Ericsson et al., “PUCCH Design for CA.” 3GPP TSG RAN WG1
`Meeting #61bis, R1-103506, 5 pages, (2010).
`Etri, “Details of DFT-S-OFDM based A/N transmission. 3GPP TSG
`RAN WG1 Meeting #62, R1-104665, 3 pages, (2010).
`ETSI TS 136211 V8.7.0, “LTE: Evolved Universal Terrestrial Radio
`Access (E-UTRA); Physical channels and modulation (3GPP TS
`36.211 version 8.7.0 Release 8).” http://www.etsi.org, 87 pages
`(2009).
`LG Electronics Inc., "Consideration on Punctured PUCCH Format.”
`3GPP TSG RAN WG1 #52bis, R1-08 1259, 4 pages (2008).
`LG Electronics, "Issues on DLACKNACK in Carrier Aggregation.”
`3GPP TSG RAN WG1 Meeting #58bis, R1-094160, pp. 1-3 (2009).
`LG Electronics, "Uplink ACKNACK transmission in LTE-Ad
`vanced, 3GPP TSG RAN WG1 #58bis, R1-094163, pp. 1-6 (2009).
`Nokia Siemens Networks et al., “Details for Block Spread DFT-S-
`OFDMA 3GPP TSG RAN WG1 Meeting #62, R1-104429, 5 pages,
`(2010).
`Nokia Siemens Networks et al., "Scrambling Sequence Initialisa
`tion. 3GPP TSG-RAN Working Group 1 #52, Tcloc R1-080940, 4
`pages, (2008).
`Panasonic, "Signaling parameters for UL ACKNACK resources.”
`3GPP TSG RAN WG1 Meeting #50, R1-0736.16, 3 pages, (2007).
`Samsung, "Slot-level UL ACKNACK Cyclic Shift/Orthogonal
`Cover Remapping.” 3GPP TSG RAN WG1 Meeting #52,
`R1-080680, 6 pages (2008).
`ZTE. "System Information Acquisition and updating for Carrier
`Aggregation.” 3GPP TSG RAN WG2 #67, R2-0947 10, pp. 1-2
`(2009).
`International Search Report and Written Opinion for Application No.
`PCT/KR2011/000195, pp. 1-9, dated Sep. 28, 2011.
`* cited by examiner
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 1 of 13
`
`US 8,971,168 B2
`
`FIG. 1
`
`111 -K
`
`
`
`2
`
`1 10 -1 ya
`
`PDCCH
`X
`
`PDSCH
`
`- - - - - - -
`
`/
`
`121 -
`PDCCH
`
`20-ya
`
`122
`
`PDSCH
`
`PUCCH
`
`-- 143
`
`an 150
`
`---- 152
`
`130 -\
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 2 of 13
`
`US 8,971,168 B2
`
`FIG. 2
`
`UPLINK
`
`212
`
`-
`
`D
`
`222
`
`232
`
`
`
`211
`
`210 -/Y
`
`22
`
`220 --/a
`
`231
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 3 of 13
`
`US 8,971,168 B2
`
`FIG 3
`
`
`
`PDCCH
`
`O
`
`PUSCH
`
`- --
`
`1- 322
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 4 of 13
`
`US 8,971,168 B2
`
`
`
`
`
`(SUI Ç’0) LOTS
`
`#7 “?INH
`
`
`
`
`
`
`
`
`
`
`
`
`
`(SUII) ZIJN VAIHgInS
`
`
`
`TVNOIS ?ION-THHH"TH £
`
`| MON?noÐIH
`
`
`
`
`
`(SULI Ç’0) LOTIS
`
`|-IVNIJI,
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 5 of 13
`
`US 8,971,168 B2
`
`NOISSIWISNVRIJL
`
`XIOWN/XHOV
`
`(INV8||
`
`
`
`| 9
`
`() |-
`
`
`
`WIVETRILS LIEI
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 6 of 13
`
`US 8,971,168 B2
`
`FIG. 6
`
`ONE SLOT (0.5 ms)
`
`N SUBCARRIERS
`
`BLHO BLH BLH2 BL3 BLF4 BLH5 BLF6
`(A) NORMAL CP
`
`
`
`-ed.
`
`ONE SLOT (0.5 ms)
`
`-
`
`N SUBCARRIERS
`
`
`
`(
`
`BL) BLil BLH2 BLH3 BLH4 BLHS
`(B) EXTENDED CP
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 7 of 13
`
`US 8,971,168 B2
`
`FIG. 7
`
`ONE SLOT (0.5 ms)
`
`N SUBCARRIERS
`
`
`
`Y
`
`.
`. .
`.
`.
`BLO BLil BLi2 BLH3 BLH4 BLi5 BLH6
`(A) NORMAL CP
`
`r
`
`ONE SLOT (0.5 ms)
`
`e
`
`A
`
`
`
`N SUBCARRIERS
`
`y
`
`BLiO BLil BLH2 BLH3 BLH4 BLF5
`(B) EXTENDED CP
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 8 of 13
`
`US 8,971,168 B2
`
`FIG. 8
`
`ONE SLOT (0.5 ms)
`
`-
`
`A
`
`N SUBCARRIERS
`
`Y
`
`*
`
`* *
`
`* *
`
`BLHO BLH BLH2
`(A) NORMAL CP
`
`ONE SLOT (0.5 ms)
`
`e
`
`
`
`A
`
`N SUBCARRIERS
`
`BL) BLH1 BLH2 BLE BL4 BLH5
`(B) EXTENDED CP
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 9 of 13
`
`US 8,971,168 B2
`
`
`
`940
`
`FIG. 9
`
`RECEIVER
`
`910
`
`CONTROLLER
`
`920
`
`TRANSMITTER
`
`930
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 10 of 13
`
`US 8,971,168 B2
`
`FIG 10)
`
`RECEIVER
`
`CONTROLLER
`
`ACK/NACK
`GENERATOR
`
`1060
`
`ENCODER
`
`TRANSMITTER
`
`FIG 11
`
`1 100
`
`TRANSMITTER
`
`
`
`120
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`>
`
`5 er,
`
`Sheet 11 of 13
`
`US 8,971,168 B2
`
`
`
`äIN VRYHJIS LI8H
`
`ZI "?INH
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 12 of 13
`
`US 8,971,168 B2
`
`|
`
`
`
`ÇI “?IJI
`
`NOIVT(\GTOWN
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`U.S. Patent
`
`Mar. 3, 2015
`
`Sheet 13 of 13
`
`US 8,971,168 B2
`
`EEEEE
`
`E.65
`
`20.53902
`
`Ea
`
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`
`0:860:8605860:860386
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`
`
`
`
`
`Fun:Pm”:Fm“:FE”:Fun:
`
`033mmflfim35m$memnqmEqm95m
`
`Ericsson Exhlblt 1101
`
`ERICSSON v. ETRI
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`
`

`

`1.
`CARRIERAGGREGATION IN WIRELESS
`COMMUNICATIONS SYSTEMS
`
`US 8,971,168 B2
`
`This application is a continuation application of Ser. No.
`13/733,453 filed on Jan. 3, 2013, which claims priority to, and
`the benefit of Korean Patent Application U.S. patent applica
`tion Ser. No. 13/441,058 filed on Apr. 6, 2012, now U.S. Pat.
`No. 8.363,537 granted on Jan. 29, 2013, which is a continu
`ation application of PCT Application No. PCT/
`KR2011 000195 filed on Jan. 11, 2011, No. 10-2010-0002231
`filed on Jan. 11, 2010, Korean Patent Application No.
`10-2010-0009024 filed on Feb. 1, 2010, Korean Patent Appli
`cation No. 10-2010-0013352 filed on Feb. 12, 2010, Korean
`Patent Application No. 10-2010-0030515 filed on Apr. 2,
`2010, Korean Patent Application No. 10-2010-0032647 filed
`on Apr. 9, 2010, Korean Patent Application No. 10-2010
`0.076337 filed on Aug. 9, 2010, Korean Patent Application
`No. 10-2010-0079742 filed on Aug. 18, 2010, Korean Patent
`Application No. 10-2010-0083363 filed on Aug. 27, 2010,
`Korean Patent Application No. 10-2010-0085528 filed on
`Sep. 1, 2010, Korean Patent Application No. 10-2010
`0085888 filed on Sep. 2, 2010, Korean Patent Application No.
`10-2010-01 10258 filedon Nov. 8, 2010, Korean Patent Appli
`cation No. 10-2010-011 1130 filed on Nov. 9, 2010, Korean
`Patent Application No. 10-2010-01 12531 filed on Nov. 12,
`2010, and Korean Patent Application No. 10-2011-0002855
`filed on Jan. 11, 2011, in the Korean Intellectual Property
`Office. The content of the aforementioned applications is
`incorporated herein by reference.
`
`10
`
`15
`
`25
`
`30
`
`TECHNICAL FIELD
`
`The present invention relates to a wireless communication
`system, and more specifically, to a wireless communication
`system employing carrier aggregation (CA).
`
`35
`
`BACKGROUND ART
`
`A carrier aggregation (CA) scheme corresponds to tech
`nology of enhancing the efficiency of data transmission by
`merging a plurality of component carriers. A terminal or a
`base station may be assigned with the plurality of component
`carriers and may transmit or receive data using the plurality of
`component carriers.
`The terminal or the base station may transmit control infor
`mation associated with the data. Acknowledgement/negative
`acknowledgement information (ACK/NACK) and an amount
`of assigned radio resources may be used as an example of the
`control information. There is a desire for research regarding a
`component carrier used to transmit control information
`among a plurality of component carriers and the control infor
`mation to be transmitted when the plurality of component
`carriers is assigned.
`
`40
`
`45
`
`50
`
`55
`
`DISCLOSURE OF INVENTION TECHNICAL
`GOALS
`
`An aspect of the present invention provides a method of
`transmitting control information when a component carrier
`scheme is applied.
`
`60
`
`TECHNICAL SOLUTIONS
`
`According to an aspect of the present invention, there is
`provided a terminal including: a receiver to receive control
`information and data using a plurality of downlink compo
`nent carriers; a controller to determine an uplink channel
`
`65
`
`2
`element included in an uplink component carrier, based on an
`index of a channel element used to transmit the control infor
`mation among a plurality of downlink channel elements
`included in the plurality of downlink component carriers; and
`a transmitter to transmit acknowledgement/negative-ac
`knowledgement information (ACK/NACK) associated with
`the data using the determined uplink channel element.
`According to another aspect of the present invention, there
`is provided a terminal including: a receiver to receive data
`from a base station; a controller to generate ACK/NACK
`associated with the data; and a transmitter to transmit, to the
`base station, a data packet including the ACK/NACK and a
`scheduling request with respect to the base station. The trans
`mitter may determine a transmit power of the data packet
`based on a number of bits of the ACK/NACK and a number of
`bits of the scheduling request that are included in the data
`packet.
`According to still another aspect of the present invention,
`there is provided a terminal including: a receiver to receive,
`from a base station, information associated with downlink
`component carriers available for a communication between
`the base station and the terminal, and to receive a data block
`using a portion of or all of data receiving component carriers
`among the downlink component carriers; and an ACK/NACK
`generator to generate ACK/NACK associated with the data
`block with respect to each of the downlink component carri
`ers, based on a transmission mode of each of the downlink
`component carriers.
`According to yet another aspect of the present invention,
`there is provided a terminal including a transmitter to trans
`mit, to a base station, a subframe including a first slot and a
`second slot. A first cyclic shift included in the first slot and a
`second cyclic shift included in the second slot may be differ
`ent from each other.
`
`EFFECT OF THE INVENTION
`
`According to embodiments of the present invention, it is
`possible to transmit control information when a component
`carrier Scheme is applied.
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`FIG. 1 is a diagram illustrating correspondence relation
`ship between a downlink component carrier and an uplink
`component carrier,
`FIG. 2 is a diagram illustrating an example of a downlink
`grant being positioned in a single component carrier,
`FIG. 3 is a diagram illustrating an example of a downlink
`grant being positioned in a plurality of component carriers;
`FIG. 4 is a diagram illustrating a channel structure accord
`ing to an embodiment of the present invention;
`FIG. 5 is a block diagram illustrating a configuration of a
`terminal according to an embodiment of the present inven
`tion;
`FIG. 6 is a diagram illustrating a channel structure accord
`ing to another embodiment of the present invention;
`FIG. 7 is a diagram illustrating a channel structure accord
`ing to still another embodiment of the present invention;
`FIG. 8 is a diagram illustrating a channel structure accord
`ing to yet another embodiment of the present invention;
`FIG. 9 is a block diagram illustrating a configuration of a
`terminal according to another embodiment of the present
`invention;
`FIG. 10 a block diagram illustrating a configuration of a
`terminal according to still another embodiment of the present
`invention;
`
`Ericsson Exhibit 1101
`ERICSSON v. ETRI
`
`

`

`US 8,971,168 B2
`
`3
`FIG. 11 a block diagram illustrating a configuration of a
`terminal according to yet another embodiment of the present
`invention; and
`FIG. 12 through FIG. 14 are diagrams illustrating an
`example of a discrete Fourier transform (DFT)-S-orthogonal
`frequency division multiplexing (OFDM) based transmis
`S1O.
`
`BEST MODE FOR CARRYING OUT THE
`INVENTION
`
`10
`
`4
`111 included in the downlink CC 110. Scheduling informa
`tion or assignment information of the PDSCH 122 included in
`the downlink CC 120 may be transmitted using only the
`PDCCH 121 included in the downlink CC 120.
`Considering uplink scheduling, a PDCCH included in a
`downlink CC may include scheduling information associated
`with a PUSCH of an uplink CC corresponding to the down
`link CC.
`The base station may transmit, to the terminal, information
`associated with correspondence relationship between an
`uplink CC and a downlink CC. Based on the correspondence
`relationship between CCs, the terminal may be aware of that
`a PDCCH is associated with scheduling of a PUSCH included
`in which uplink CC. Referring to FIG. 1, the downlink CC
`110 corresponds to the uplink CC 140, and the downlink CC
`120 corresponds to the uplink CC 150. In this case, schedul
`ing information included in the PDCCH 111 may relate to the
`PUSCH 142, and scheduling information included in the
`PDCCH 121 may relate to the PUSCH 152.
`The base station may include, in System information, the
`correspondence relationship between the CCs and thereby
`transmit the system information.
`FIG. 2 is a diagram illustrating an example of downlink
`grants being positioned in a single CC. The downlink grants
`may be transmitted via a PDCCH and may include resource
`assignment information associated with downlink or uplink.
`When using cross-carrier scheduling, scheduling informa
`tion or assignment information of each PDSCH may be trans
`mitted using a PDCCH of a predetermined downlink CC. In
`this case, the downlink CC including the PDCCH used to
`transmit Scheduling information may correspond to the PCC.
`Anuplink ACK/NACK resource may be determined based
`on an index value of a first channel element among Control
`Channel Elements (CCEs) constituting the PDCCH used for
`the downlink grant. When data is transmitted to a plurality of
`CCs, the same number of PDCCHs as a number of the plu
`rality of CCs may be used. Accordingly, when a total of N
`PDCCHs are used, a total of NACK/NACK resources may be
`determined to be mapped by an index value of a first channel
`element of each PDCCH. The terminal may transmit an ACK/
`NACK signal using NACK/NACK resources. The terminal
`may also transmit ACK/NACK by assigning an additional
`radio resource to an uplink PCC.
`The terminal may transmit NACK/NACK signals using a
`predetermined single uplink CC. As shown in FIG. 2, when a
`PDCCH is transmitted using only a downlink PCC, implicit
`resource mapping relationship of a conventional Long Term
`Evolution (LTE) Release 8/9 standard may be employed as is
`and thus, resources may be efficiently used.
`FIG. 3 is a diagram illustrating an example of downlink
`grants being positioned in a plurality of CCs. Referring to
`FIG. 3, PDCCHs may be transmitted using a plurality of
`downlink CCs. However, ACK/NACK may be transmitted
`using a single uplink CC. Accordingly, a resource corre
`sponding to an uplink PCC may be set with respect to a
`PDCCH present in each corresponding downlink CC.
`Also, ACK/NACK may be transmitted by assigning an
`additional radio resource to the uplink PCC.
`When cross-carrier scheduling is set with respect to the
`terminal, a carrier indicator field (CIF) within the PDCCH
`may be used. When the PDCCH is received using only the
`downlink PCC as shown in FIG. 2, the terminal may transmit
`ACK/NACK by selecting a resource or a sequence using
`PUCCH format 1a or format 1b ACK/NACK resources that
`are determined within the uplink PCC, based on implicit
`mapping relationship between ACK/NACK resources and the
`lowest CCE index of the PDCCH as defined in the LTE
`
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`Reference will now be made in detail to embodiments of
`the present invention, examples of which are illustrated in the
`accompanying drawings, wherein like reference numerals
`refer to the like elements throughout. The embodiments are
`described below in order to explain the present invention by
`referring to the figures.
`FIG. 1 is a diagram illustrating correspondence relation
`ship between a downlink component carrier (CC) and an
`uplink CC.
`A terminal may receive data from a base station using a
`plurality of downlink CCs 110, 120, and 130, and may trans
`mit, to the base station, an acknowledgement (ACK)/nega
`tive-acknowledgement (NACK) message with respect to the
`data using a plurality uplink CCs 140 and 150.
`Each of the downlink CCs 110, 120, and 130 may include
`control information, for example, Physical Downlink Control
`Channels (PDCCHs) 111, 121, and 131, and data, for
`example, Physical Downlink Shared Channels (PDSCHs)
`112, 122, and 132. Each of the uplink CCs 140 and 150 may
`include control information, for example, Physical Uplink
`Control Channels (PUCCHs) 141, 143, 151, and 153, and
`data, for example, Physical Uplink Shared Channels
`(PUSCHs) 142 and 152.
`The terminal may set, as the downlink primary component
`carrier (PCC), one of CCs included in a set of configured CCs.
`Remaining CCs excluding the downlink PCC from the con
`figured CCs may be referred to as downlink secondary com
`ponent carriers (SCCs).
`The downlink PCC may be included in the set of config
`ured CCs of the terminal at all times while the terminal
`maintains an access with the base station. The downlink PCC
`may correspond to a CC used at the base station to transmit
`system information. The base station may transmit system
`information associated with the PCC and system information
`associated with the SCC using the PCC.
`The base station may notify the terminal of the downlink
`PCC using Radio Resource Control (RRC) signaling.
`An uplink CC used at the terminal to transmit PUCCH
`acknowledgement/negative-acknowledgement information
`50
`(ACK/NACK) may be referred to as the uplink PCC. The
`downlink PCC and the uplink PCC may need to be connected
`to each other by a predetermined connection relationship. The
`base station may notify the terminal of the uplink PCC using
`RRC signaling.
`The uplink PCC and the downlink PCC may be differently
`set for each terminal.
`Using RRC signaling, the base station may notify the ter
`minal regarding whether cross-carrier scheduling is to be
`employed. When the cross-carrier scheduling is not used,
`scheduling information or assignment information of the
`PDSCHs 112, 122, and 132 included in the downlink CCs
`110, 120, and 130 may betransmitted using the PDCCHs 111,
`121, and 131 included in the corresponding downlink CCs
`110, 120, and 130. Specifically, scheduling information or
`assignment information of the PDSCH 112 included in the
`downlink CC 110 may be transmitted using only the PDCCH
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`Ericsson Exhibit 1101
`ERICSSON v. ETRI
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`

`5
`Release 8 standard. In particular, when the terminal is con
`figured to use two downlink CCs, that is, when two downlink
`configured CCS are present, and when cross-carrier Schedul
`ing is set with respect to the terminal, the PDCCH may be
`received using only the downlink PCC at all times as shown in
`FIG 2.
`Even though PDSCHassignment using a dynamic PDCCH
`is absent in the PCC, semi-persistent scheduling (SPS)
`assignment may be present in the PCC. In this case, the
`terminal may include a persistent ACK/NACK resource cor
`responding to the SPS assignment in ACK/NACK channels
`for resource and sequence selection.
`However, when all of downlink CCs are connected to the
`same single uplink CC, the resource and sequence selection
`may be performed using an uplink ACK/NACK channel that
`is secured based on implicit mapping relationship between a
`lowest CCE index of the PDCCH and the ACK/NACK
`resource, regardless of whether the cross-carrier Scheduling is
`set with respect to the terminal.
`When a resource is secured according to the aforemen
`tioned scheme, an additional resource may need to be secured
`in order to enhance the performance of ACK/NACK trans
`mission.
`According to an aspect, an uplink ACK/NACK resource
`may be secured by employing the implicit mapping relation
`ship of the ACK/NACK resource disclosed in the LTE Rel-8/9
`standard, and by substituting the second lowest CCE index of
`the PDCCH instead of substituting the lowest CCE index. In
`this case, the base station may need to constitute the PDCCH
`with minimum two CCEs.
`30
`However, in the above scheme, when an SPS is assigned to
`a subframe, an assigned downlink PDCCH may be absent in
`the subframe. In this case, since only a single ACK/NACK
`resource corresponding to the SPS assignment is secured in
`LTE, another assignment Scheme may need to be employed to
`secure an additional resource.
`According to an aspect, an additional resource may be
`secured using explicit signaling. As an example of the explicit
`signaling, the terminal may be directly notified through RRC
`signaling, or may be notified by assigning a single bit or a
`40
`plurality of bits to a DCI (downlink control information)
`format for downlink scheduling. As another example, the
`terminal may be notified of a resource by notifying the ter
`minal of a portion of a resource assignment position through
`RRC signaling, and by finally assigning the single bit or the
`plurality of bits to the DCI format for downlink scheduling.
`When cross-carrier scheduling is not set with respect to the
`terminal, a PDCCH may not include the CIF. In this case, the
`base station may assign an ACK/NACK resource within the
`uplink PCC through separate RRC signaling. Here, a number
`50
`of ACK/NACK resources corresponding to a number of
`downlink configured CCS may need to be assigned. For
`example, when the number of downlink configured CCs is N.
`N PUCCHACK/NACK resources may need to be assigned.
`When a PDSCH assignment using a dynamic PDCCH is
`present in the downlink PCC, an ACK/NACK resource deter
`mined within the uplink PCC based on implicit mapping
`relationship between the ACK/NACK resource and the low
`est CCE index defined in the LTE Release 8 standard may be
`included in ACK/NACK channels for the resource and
`sequence selection.
`Even though the PDSCH assignment using the dynamic
`PDCCH is absent in the downlink PCC, the SPS assignment
`may be present in the downlink PCC. In this case, a persistent
`ACK/NACK resource corresponding to the SPS assignment
`may be included in ACK/NACK channels for the resource
`and sequence selection.
`
`6
`The aforementioned scheme may be applicable when dif
`ferent uplink CCs are connected to a single downlink CC.
`When all of downlink CCs are connected to the same uplink
`CC, the resource and sequence selection may be always per
`formed using the uplink ACK/NACK channel that is secured
`based on implicit mapping relationship between the ACK/
`NACK resource of the PDCCH and the lowest CCE index
`defined in the LTE Release 8/9 standard, regardless of
`whether cross-carrier scheduling is set with respect to the
`terminal.
`According to an aspect, with respect to all of downlink CCs
`connected to the uplink PCC, the uplink ACK/NACK channel
`secured based on the implicit mapping relationship defined in
`the LTE Release 8/9 standard may be included in the ACK/
`NACK channel for the resource and sequence selection at all
`times. Even in this case, when the PDSCH assignment using
`the dynamic PDCCH is absent, however, the SPS assignment
`is present with respect to the downlink CCs connected to the
`uplink PCC, the persistent ACK/NACK resource correspond
`ing to the SPS assignment may be included in ACK/NACK
`channels for the resource and sequence selection.
`When cross-carrier scheduling is not set with respect to the
`terminal, the PDCCH may not include the CIF. Even in this
`case, an additional resource may be further secured and be
`included in ACK/NACK channels for the resource and
`sequence selection.
`When a PDCCH is transmitted from the downlink PCC
`with respect to an uplink PCC whereby resource assignment
`is performed, an uplink ACK/NACK resource may be secured
`by employing implicit mapping relationship of the ACK/
`NACK resource disclosed in the LTE Release 8/9 standard,
`and by substituting the second lowest CCE index of the
`PDCCH, instead of substituting the lowest CCE index of the
`PDCCH. In this case, the base station may constitute the
`PDCCH with minimum two CCEs. However, in this scheme,
`when an SPS is assigned to a subframe, an assigned downlink
`PDCCH may be absent in the subframe. In this case, since
`only a single ACK/NACK resource corresponding to the SPS
`assignment is secured in LTE, another assignment scheme
`may need to be employed to secure an additional resource.
`The additional resource may be secured using explicit signal
`ing. The above scheme may directly notify the terminal
`through RRC signaling, or may notify the terminal by assign
`ing a single bit or a plurality of bits to a DCI format for
`downlink scheduling. As another scheme, the terminal may
`be notified of a resource by notifying the terminal of a portion
`of a resource assignment position through RRC signaling and
`by finally assigning the single bit or the plurality of bits to the
`DCI format for downlink scheduling.
`Hereinafter, a resource assignment method for ACK/
`NACK feedback using a channel selection scheme will be
`described using examples. It may be assumed that a number
`of channels are assigned based on a number of bits of ACK/
`NACK to be transmitted as shown in Table 1.
`
`TABLE 1
`
`Number of channels assigned based
`on number of bits of ACKNACK
`
`Number of AN bits
`
`Maximum number of AN channels
`required for channel selection
`
`2
`3
`4
`
`2
`3
`4
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`US 8,971,168 B2
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`ERICSSON v. ETRI
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`7
`For channel selection, when a PDSCH assignment is per
`formed using a PDCCH, minimum at least one channel may
`be secured from indices of CCEs constituting the PDCCH,
`ACK/NACK resource indication (ARI) information, and the
`like. When a number of transport blocks is one, a single
`channel may be secured. When the number of transport
`blocks is two, two channels may be secured.
`When the PDCCH is transmitted from the downlink PCC
`and is used for data assignment with respect to the downlink
`PCC or a downlink SCC, and when a single transport block is
`transmitted, a single channel may be secured according to the
`Rel-8/9 resource assignment method using the lowest CCE
`index among indices of CCEs constituting the PDCCH.
`When two transport blocks are transmitted, two channels may
`be secured according to the Rel-8/9 resource assignment
`method using the lowest CCE index and the second lowest
`CCE index among indices of the CCEs constituting the
`PDCCH.
`When the PDCCH is transmitted from the downlink PCC
`and a single transport block is transmitted, assignment of an
`additional resource may be required so that the terminal using
`multiple antennas may perform transmission using a Spatial
`Orthogonal Resource Transmit Diversity (SORTD). In this
`case, two channels may be secured according to the Rel-8/9
`resource assignment method using the lowest CCE index and
`the second lowest CCE index among indices of the CCES
`constituting the PDCCH.
`According to another aspect, when a PDCCH is transmit
`ted from an SCC instead of a downlink PCC, a channel may
`be secured according to the following scheme. The base sta
`tion may notify the terminal of a parameter nevccuo'
`through RRC signaling. When the PDCCH is transmitted
`from the SCC instead of the downlink PCC, 2 bits within a
`DCI format may be used as resource assignment information.
`The above 2 bits may correspond to ARI. When a plurality of
`35
`PDCCHs is transmitted from the SCC, all ARI may use the
`same value. The ARI may map in
`value, and may define
`necci'as follows:
`(1)
`(1)-
`24Rf
`iPUCCH
`apUCCH.o.
`For example, n
`value according to an ARI bit value may
`be defined as shown in Table 2. A
`may use a value prede
`termined in a standard, or may use a value notified from the
`base station to the terminal through higher layer signaling.
`
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`TABLE 2
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`45
`
`in R, value according to ARIbit value
`
`ARI
`
`OO
`O1
`10
`11
`
`Il-AR
`
`O
`1Aa?set
`2Aafset
`3Aafset
`
`The terminal may determine a usage resource from
`ner?' using the same scheme as Rel-8/9. When a single
`transport block is transmitted, a single channel determined
`according to the above scheme may be secured. When two
`transport blocks are transmitted, one method is that the ter
`minal may use two resources corresponding to nece?',
`neticci'+1.
`According to another aspect, when an SCC transmitting a
`PDCCH containing downlink scheduling information is set to
`a transmission mode capable of transmitting maximum two
`transport blocks, the base station may transmit, to the