I 1111111111111111 1111111111 1111111111 1111111111 1111111111111111 IIII IIII IIII
`
`US010158461B2
`
`c12) United States Patent
`Li et al.
`
`(IO) Patent No.: US 10,158,461 B2
`(45) Date of Patent:
`Dec. 18, 2018
`
`(54) UPLINK CONTRO L INFORMATION
`TRANSMITTING METHOD AND
`A PPARATUS
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`(71) Applicant: Samsung Electronics Co., Ltd.,
`Suwon-si, Gyeonggi-do (KR)
`
`2013/0259011 Al* 10/2013 Nakashima .
`
`H04W 72/0473
`370/336
`8/2014 Seo ....................... H04L 1/0041
`370/329
`
`2014/0233517 Al*
`
`(72)
`
`Inventors: Yingyang Li, Beijing (CN); Shichang
`Zhang, Beijing (CN); Yi Wang, Beijing
`(CN); Jingxing Fu, Beijing (CN)
`
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`
`(73) Assignee: Samsung Electronics Co., Ltd.,
`Suwon-si (KR)
`
`WO
`
`WO
`
`WO
`
`2012-060630 A2
`2013/191453 Al
`2014/021631 Al
`
`5/2012
`12/2013
`2/2014
`
`( *) Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 166 days.
`
`(21) Appl. No.: 15/155,638
`
`(22)
`
`Filed:
`
`May 16, 2016
`
`(65)
`
`Prior Publication Data
`
`OTHER PUBLICATIONS
`
`LG Electronics, 'HARQ-ACK PUCCH transmission for Rel-13
`CA', Rl-151502, 3GPP TSG RAN WGl Meeting #80bis, Belgrade,
`Serbia, Apr. 11, 2015.
`
`(Continued)
`
`Primary Examiner - Walter J Divito
`Assistant Examiner - Anthony Luo
`(74) Attorney, Agent, or Firm - Jefferson IP Law, LLP
`
`US 2016/0338041 Al
`
`Nov. 17, 2016
`
`(57)
`
`ABSTRACT
`
`(30)
`
`Foreign Application Priority Data
`
`May 14, 2015
`
`(CN) .......................... 2015 1 0246773
`
`(51)
`
`Int. Cl.
`H04L 5100
`
`H04W52/14
`
`(2006.01)
`(2009.01)
`(Continued)
`
`(52) U.S. Cl.
`CPC ............ H04L 51001 (2013.01); H04L 111671
`(2013.01); H04L 111861 (2013.01);
`(Continued)
`
`( 58) Field of Classification Search
`CPC .. H04W 72/0413; H04W 52/143; H04L 5/14;
`H04L 5/0055; H04L 1/1812
`See application file for complete search history.
`
`An uplink control information (UCI) transmitting method is
`provided. In this method, a user equipment (UE) receives a
`configuration signaling, determines a candidate physical
`uplink control channel (PUCCH) set corresponding to an
`acknowledgement
`(ACK)/negative
`acknowledgement
`(NACK) resource indication (ARI), receives a downlink
`grant signaling and downlink data corresponding to the
`downlink grant signaling, generates hybrid automatic repeat
`request ACK (HARQ-ACK) bits, performs processing for
`UCI bits including HARQ-ACK, determines the PUCCH
`used to transmit the UCI bits in the candidate PUCCH set
`according to an ARI in the downlink grant signaling, and
`transmits the UCI bits on the determined PUCCH. The
`present disclosure further provides an aperiodic channel
`state information (A-CSI) transmitting method. In this
`method, a UE receives an uplink grant signaling, determines
`whether an A-CSI report is triggered according to a CSI
`(Continued)
`
`A UE receives a configuration signalling,
`and determines a candidate PUCGH set corresponding to an ARI ,_ 201
`I
`
`!
`
`The UE receives a downiink grant signalling and
`downlink data corresoonding to the downlinK
`grant signalling, and generates HARO-ACK bits
`
`I
`
`~-202
`
`1~~
`
`I
`
`I
`
`me UE oerforms processing for the UCI bits,
`determines the ?UCCH used to transmit me
`UGI bits in the candidate PUCCH set
`according to the ARI in the downlink grant signalling.
`and transmits the UCI nils on the determined PUCCH
`
`1
`
`APPLE 1012
`
`

`

`US 10,158,461 B2
`Page 2
`
`request field in the uplink grant signaling, determines a CSI
`process to be updated after determining that the A-CSI
`report is triggered, and transmits A-CSI on an uplink com(cid:173)
`ponent carrier (CC) carrying the A-CSI report.
`
`2016/0192388 Al*
`
`2016/0212649 Al *
`2017 /0078072 Al *
`
`6/2016 Ekpenyong .
`
`H04W 72/1284
`370/329
`7/2016 Chen .
`H04W 24/10
`.................... H04L 1/0026
`3/2017 Kang
`
`8 Claims, 6 Drawing Sheets
`
`OTHER PUBLICATIONS
`
`(51)
`
`(52)
`
`(2006.01)
`(2006.01)
`(2006.01)
`(2009.01)
`
`Int. Cl.
`H04L 1116
`H04L 1118
`H04L5/14
`H04W52/54
`U.S. Cl.
`CPC .......... H04L 111864 (2013.01); H04L 510016
`(2013.01); H04L 510055 (2013.01); H04L
`510087 (2013.01); H04W 521143 (2013.01);
`H04L 5/14 (2013.01); H04W 52/545 (2013.01)
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`Intel Corporation, 'Clarification on PUCCH Format 3 Resource
`Derivation for TDD UL/DL Configuration 5', Rl-150231, 3GPP
`TSG RAN WGl Meeting #80bis, Belgrade, Serbia, Feb. 18, 2015.
`Nokia Networks, 'Dynamic adaptation of HARQ-ACK feedback
`size and PUCCH format', Rl-151838, 3GPP TSG RAN WGl
`Meeting #80bis, Belgrade, Serbia, Apr. 10, 2015.
`Alcatel-Lucent et al., "PUCCH design for A/N feedbacks on PCell
`up to 32 carrier aggregation", 3GPP Draft, Rl-151326, EPUCCH
`PCell Final, 3GPP TSG-RAN WG2 Meeting #80bis, Apr. 20-24,
`2015, XP050934205, Belgrade, Serbia.
`Texas Instruments, Multiplexing periodic CSI and HARQ-ACK on
`PUCCH Format 3, 3GPP TSG RAN WGl #70, Rl-123187,
`XP050661079, Qingdao, China, Aug. 13-17, 2012.
`Catr, Consideration on enhancement to UL control signalling for up
`to 32 component carriers, 3GPP TSG RAN WGl Meeting #80bis,
`Rl-152043, XP050934892, Belgrade, Republic of Serbia, Apr.
`20-24, 2015.
`
`2015/0078225 Al
`2015/0156762 Al
`
`3/2015 Yangetal.
`6/2015 Hwang et al.
`
`* cited by examiner
`
`2
`
`

`

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`
`Modulating
`
`Ceil soecmc Scrambling
`
`Channel Encoding
`
`FIG. 1
`
`3
`
`

`

`U.S. Patent
`
`Dec. 18, 2018
`
`Sheet 2 of 6
`
`US 10,158,461 B2
`
`FIG. 2
`
`A UE receives a configuration signalling,
`and determines a candidate PUCCH set corresponding to an ARI
`
`"---201
`
`;
`
`The UE receives a downlink grant signalling and
`downlink data corresoonding to the downlink
`grant sigm:1mng, and generates HARO-ACK Ms
`
`-'-._,, 202
`
`,r
`
`me UE oerforms orocessing for the UCI bits,
`determines the PUCCH used to transmit the
`UCI bits In the candidate PUCCH set
`according to the ARI in the downlink grant signalling,
`and transmits the UCI bits on the determined PUCCH
`
`''-' 203
`
`4
`
`

`

`"'""' = N
`
`0--,
`~
`00
`"'""' UI
`'"=
`"'""'
`d r.,;_
`
`O'I
`
`~
`
`('D
`('D
`
`0 ....
`.....
`rJJ =(cid:173)
`
`~ ....
`c ('D
`
`N
`'"CIO
`
`0 ....
`
`CIO
`
`~ = ~
`
`~
`~
`~
`•
`00
`
`e •
`
`Time slot 2
`
`Mapping to SCF(cid:143)MA symbols
`
`occ Extension
`
`Modulating
`
`nme slot 1
`
`Maooing to SCFDMA svmbols
`
`occ Extension
`
`Modulating
`
`last C mux,1 columns
`
`First C rnux.o columns
`
`Jll,,,--J)
`
`1 )xC ]IJ,L\ +2
`
`l.._( R'
`H
`
`Jl,L\ -i he Ill," +1
`
`.Im 1
`
`-1),J:lllllA
`
`L{H
`
`z.c, +:,
`
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`\,T ,,
`
`o.
`Modulating
`
`Cell Specific Scrambling
`
`Channel Encoding
`
`UCI
`
`FIG. 3
`
`5
`
`

`

`U.S. Patent
`
`Dec. 18, 2018
`
`Sheet 4 of 6
`
`US 10,158,461 B2
`
`FIG. 4
`
`HARO-ACK bit
`generating module
`
`UCIM
`processing module
`
`Candidate PUCCH
`set determining module
`
`PUCCH
`determining module
`
`Transmitting module
`
`6
`
`

`

`U.S. Patent
`
`Dec. 18, 2018
`
`Sheet 5 of 6
`
`US 10,158,461 B2
`
`FIG. 5
`
`A UE receives an uo!inK grant signamng
`
`,..., "---501
`
`'
`
`The UE determines whether an A-CSI reoort is triggered
`according to a CSI reauest field in the uplink grant signalling
`
`-'-._,, 502
`
`After determining the A-CS! reoort is triggered,
`the UE determines a CSI orncess to be uodated,
`and transmits A-CSI on an uolinK CC carrving the A-CSI reoort
`
`7
`
`

`

`U.S. Patent
`
`Dec. 18, 2018
`
`Sheet 6 of 6
`
`US 10,158,461 B2
`
`FIG. 6
`
`Receiving module
`
`A-CS! report
`triggering module
`
`Transmitting module
`
`8
`
`

`

`US 10,158,461 B2
`
`1
`UPLINK CONTROL INFORMATION
`TRANSMITTING METHOD AND
`APPARATUS
`
`CROSS-REFERENCE TO RELATED
`APPLICATION(S)
`
`2
`and are mapped to a physical channel for transmission. The
`PUCCH format 3 may support transmission of at most 22
`bits.
`The above information is presented as background infor-
`5 mation only to assist with an understanding of the present
`disclosure. No determination has been made, and no asser(cid:173)
`tion is made, as to whether any of the above might be
`applicable as prior art with regard to the present disclosure.
`
`SUMMARY
`
`This application claims the benefit under 35 U.S.C.
`§ 119(a) of a Chinese patent application filed on May. 14,
`2015 in the Chinese Patent Office and assigned Serial 10
`number 201510246773.2, the entire disclosure of which is
`hereby incorporated by reference.
`
`TECHNICAL FIELD
`
`The present disclosure relates to wireless communication
`fields. More particularly, the present disclosure relates to an
`uplink control information (UCI) transmitting method and
`apparatus.
`
`BACKGROUND
`
`In a long term evolution (LTE) system, wide work band(cid:173)
`width can be obtained by aggregation of multiple component
`carriers (CCs) to constitute a downlink and an uplink, i.e., a
`carrier aggregation (CA) technology, so as to support a high
`transmission rate. At present, various types of CA are
`supported, i.e., all aggregated cells are frequency division
`duplex (FDD) cells, all aggregated cells are time division
`duplex (TDD) cells TDD uplink configuration and TDD
`downlink configuration of which are same, all aggregated
`cells are TDD cells TDD uplink configuration and TDD
`downlink configuration of which are different, aggregation
`of FDD cells and TDD cells are also supported. And the 35
`TDD uplink configuration and TDD downlink configuration
`of the TDD cells may be semi-statically configured, or may
`be dynamically changed.
`For a user equipment (UE), when a CA mode is config(cid:173)
`ured, a cell is a primary cell (Pcell), and other cells are 40
`referred to as secondary cells (Scells). According to a LTE
`method, on the Pcell and the Scells, downlink data is
`transmitted based on a hybrid automatic repeat request
`(HARQ) mechanism. Accordingly, the UE needs to feed
`HARQ acknowledgment (HARQ-ACK) corresponding to 45
`multiple cells back. For a cell in a FDD system, the
`HARQ-ACK corresponding to data in a downlink subframe
`is transmitted in an uplink subframe. For a cell in a TDD
`system, when the number of downlink subframes is more
`than the number of uplink subframes in its frame structure, 50
`HARQ-ACK corresponding to data in multiple downlink
`subframes is transmitted in an uplink subframe, wherein the
`multiple downlink subframes are referred to as a bundling
`window corresponding to the uplink subframe. For example,
`a size of the bundling window in a LTE TDD cell may be 1, 55
`2, 3, 4, or 9. According to a LTE method, HARQ-ACK
`corresponding to all configured cells is fed back in a physical
`uplink control channel (PUCCH) on the Pcell. In addition,
`periodic channel state information (P-CSI) of various cells is
`also mapped to the Pcell for transmission, and aperiodic CSI 60
`(A-CSI) of various cells is mapped to a physical uplink
`shared channel (PUSCH) for transmission.
`According to a LTE method, a PUCCH format 3 is
`supported, and a basic idea of the PUCCH format 3 includes
`that multiple pieces of uplink control information (UCI) bits, 65
`e.g., HARQ-ACK bits, scheduling requests (SRs), and/or
`P-CSI from multiple configured cells, are jointed encoded,
`
`0
`
`20
`
`Aspects of the present disclosure are to address at least the
`above-mentioned problems and/or disadvantages and to
`provide at least the advantages described below. Accord-
`15 ingly, an aspect of the present disclosure is to provide uplink
`control information (UCI) transmitting methods and appa(cid:173)
`ratus, so as to support transmission of more than 22 UCI bits
`and to implement effective aperiodic channel state informa-
`tion (A-CSI) transmission.
`In accordance with an aspect of the present disclosure, an
`UCI transmitting method is provided. The UCI transmitting
`method includes receiving, by a user equipment (UE), a
`configuration signaling, determining a candidate physical
`uplink control channel (PUCCH) set corresponding to an
`25 acknowledgement
`ACK)/negative
`acknowledgement
`(NACK) resource indication (ARI), receiving, by the UE, a
`downlink grant signaling and downlink data corresponding
`to the downlink grant signaling, generating hybrid automatic
`repeat request ACK (HARQ-ACK) bits, and performing, by
`30 the UE, processing for UCI bits including HARQ-ACK,
`determining the PUCCH used to transmit the UCI bits in the
`candidate PUCCH set according to an ARI in the downlink
`grant signaling, and transmitting the UCI bits on the deter(cid:173)
`mined PUCCH.
`Preferably, when a PUCCH format X is used to transmit
`the UCI bits, the process of the UE performing the process(cid:173)
`ing for the UCI bits and transmitting the UCI bits on the
`PUCCH comprises:
`writing the UCI bits after performing encoding, rate
`matching (RM) and scrambling into a (RmuxxCm,,,J matrix,
`reading the UCI bits out colunm by colunm, mapping first
`cmux o colunms to a first time slot, mapping last cmux l
`coh.1~ns to a second time slot, respectively mapping the fir;t
`cmux o colunms in the first time slot and the last cmux l
`col~s in the second time slot after performing orthogon~l
`cover code (OCC) extension to single-carrier frequency-
`division multiple access (SCFDMA) symbols,
`wherein the number of colunms of the (RmuxxCmux)
`matrix Cmux is determined according to the number of the
`SCFDMA symbols and a length of OCC of the PUCCH
`format X, the number of rows Rmux is determined according
`to the number of modulation symbols transmission of which
`is supported by the PUCCH format X and the number of
`physical bits allowed to be carried by each of the modulation
`symbols, wherein cmux a+Cmux l =Cmux·
`Preferably, when th~ UCI
`bits includes periodic CSI
`(P-CSI), the UCI bits including the P-CSI are transmitted on
`the PUCCH indicated by the ARI.
`Preferably, the processing of determining the PUCCH
`according to the ARI comprises:
`respectively mapping the ARI and additional control
`information after processed together to transmission power
`control (TPC) fields in downlink grant signalings except a
`TPC field still used for the power control in a downlink grant
`signaling on a primary cell (Pcell); determining the PUCCH
`according to the ARI mapped to the corresponding TPC
`field.
`
`9
`
`

`

`US 10,158,461 B2
`
`3
`Preferably, the process of mapping the ARI and the
`additional control information comprises: mapping the ARI
`to TPC fields in first N successive downlink grant signalings
`transmitted by the base station except the downlink grant
`signaling including the TPC field still used for the power 5
`control on the Pcell, and mapping the additional control
`information to a TPC field in a remaining downlink grant
`signaling, wherein N is a integer more than or equal to 4.
`Preferably, the process of mapping the additional control
`information to the TPC field in the remaining downlink grant 10
`signaling comprises:
`using the TPC field in the remaining downlink grant
`signaling to carry the total number of currently-scheduled
`downlink grant signalings; or
`using the TPC field in the remaining downlink grant
`signaling to carry the total number of currently-scheduled
`transport blocks (TBs ).
`Preferably, the process of the total number of the cur(cid:173)
`rently-scheduled downlink grant signalings or the total num- 20
`ber of the currently-scheduled TBs is counted in a time
`domain, in a frequency domain, or jointly in both the time
`domain and the frequency domain.
`Preferably, the process of determining the PUCCH
`according to the ARI comprises:
`determining the PUCCH according to the ARI, selecting
`a PUCCH format according to the number of the UCI bits;
`or
`determining a PUCCH format and the PUCCH currently
`used according to the ARI, wherein PUCCH formats corre(cid:173)
`sponding to different PUCCHs in the candidate PUCCH set
`is same or different.
`In accordance with another aspect of the present disclo(cid:173)
`sure, an UCI transmitting apparatus is provided. The UCI
`transmitting apparatus includes a candidate PUCCH set 35
`determining module, to receive a configuration signaling,
`determine a candidate PUCCH set corresponding to an ARI,
`a HARQ-ACK bit generating module, to receive a downlink
`grant signaling and downlink data corresponding to the
`downlink grant signaling, generate HARQ-ACK bits, a UCI
`bit processing module, to perform processing for the UCI
`bits including HARQ-ACK, a PUCCH determining module,
`to determine the PUCCH used to transmit the UCI bits in the
`candidate PUCCH set according to an ARI in the downlink
`grant signaling, and a transmitting module, to transmit the 45
`UCI bits on the determined PUCCH.
`In accordance with another aspect of the present disclo(cid:173)
`sure, an A-CSI transmitting method is provided. The A-CSI
`transmitting method includes receiving, by a UE, an uplink
`grant signaling, determining, by the UE, whether an A-CSI 50
`report is triggered according to a CSI request field in the
`uplink grant signaling, and after determining that the A-CSI
`report is triggered, determining, by the UE, a CSI process to
`be updated, and transmitting A-CSI on an uplink component
`carrier (CC) carrying the A-CSI report.
`Preferably, the process of determining whether the A-CSI
`report is triggered according to the CSI request field in the
`uplink grant signaling comprises: for a CC only configured
`with downlink transmission, determining, by the UE,
`whether the A-CSI report is triggered by detecting a down(cid:173)
`link control information (DCI) format 0, wherein the CSI
`request field in the DCI format 0 is used to triggertheA-CSI
`report of the CC only configured with the downlink trans-
`m1ss10n.
`Preferably, for the CC only configured with the downlink 65
`transmission, when it is determined that the A-CSI report is
`triggered according to the DCI format 0, the uplink CC
`
`4
`carrying the A-CSI report is a Pcell, a primary secondary cell
`(PScell) or an uplink CC indicated by designated bits in the
`DCI format 0.
`Preferably, for the CC only configured with the downlink
`transmission,
`a CSI process triggered by each value of the CSI request
`field in the DCI format O is independently configured by a
`high layer signaling; and/or
`more than 2 bit information in the DCI format O is used
`as the CSI request field; and/or
`the process of transmitting the A-CSI on the uplink CC
`carrying the A-CSI report comprises: when uplink data
`transmission is not scheduled for the UE on the uplink CC
`15 carrying the A-CSI report, determining a physical uplink
`shared charmel (PUSCH) parameter of the uplink CC
`according to the DCI format 0, and transmitting the A-CSI;
`when the uplink data transmission is scheduled for the UE
`on the uplink CC and another A-CSI report is not triggered,
`determining the PUSCH parameter of the uplink CC accord(cid:173)
`ing to the uplink grant signaling of the uplink CC, and
`transmitting the A-CSI; when the UE detects the uplink
`grant signaling on the uplink CC and the uplink grant
`signaling triggers another A-CSI, only transmitting, by the
`25 UE, the A-CSI triggered by the uplink grant signaling, or
`simultaneously feeding, by the UE, two A-CSI reports back.
`Preferably, the process of determining the CSI process to
`be updated comprises:
`when the A-CSI of multiple cell groups (CGs) are trig-
`30 gered in a subframe and the total number of triggered CSI
`processes N is more than a UE capability of updating and
`reporting the A-CSI K, selecting K CSI processes with
`highest K priorities from the N CSI processes, updating and
`reporting the K CSI processes.
`Preferably, a way of determining priorities of different
`CSI processes comprises:
`a priority of the CSI process of simultaneously feeding
`rank indicator (RI) and channel quality information (CQI)/
`precoding matrix indicator (PMI) back is higher than a
`40 priority of the CSI process of only feeding the CQI/PMI
`back when default RI is used; and/or
`the priorities of the CSI processes are determined accord(cid:173)
`ing to priorities of various pre-defined CSI report modes
`used for the A-CSI; and/or
`the priorities of the CSI processes are determined accord(cid:173)
`ing to priorities of various pre-defined downlink transmis(cid:173)
`sion modes; and/or
`the priorities of the CSI processes are determined accord(cid:173)
`ing to CSI process identifications (IDs); and/or
`a unique cell ID is configured for each CC configured for
`the UE, the priorities of the CSI processes are determined
`according to cell IDs; and/or
`a cell ID is configured for each CC configured for the UE,
`the cell ID is a cell index in a CG, and the priorities of the
`55 CSI processes are determined according to cell IDs; and/or
`the priorities of the CSI processes are determined accord(cid:173)
`ing to CG indices; and/or
`when a CG is divided to multiple A-CSI subsets of
`feeding the A-CSI back, the priorities of the CSI processes
`60 are determined according to A-CSI subset indices; and/or
`the priorities of the CSI processes are determined accord(cid:173)
`ing to whether cells carry UCI, wherein a priority of a Peel!
`is higher than a priority of a PScell, the priority of the PScell
`is higher than a priority of another Scell; and/or
`a priority of the CSI process of a cell in a licensed
`spectrum is higher than a priority of the CSI process of a cell
`in an unlicensed spectrum, or the priority of the CSI process
`
`10
`
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`

`US 10,158,461 B2
`
`6
`FIG. 6 is a schematic diagram illustrating a structure of an
`A-CSI transmitting apparatus according to various embodi(cid:173)
`ments of the present disclosure.
`Throughout the drawings, it should be noted that like
`reference numbers are used to depict the same or similar
`elements, features, and structures.
`
`DETAILED DESCRIPTION
`
`5
`
`5
`of the cell in the unlicensed spectrum is higher than the
`priority of the CSI process of the cell in the licensed
`spectrum.
`Preferably, when the K CSI processes with the K highest
`priorities are selected, for an A-CSI report corresponding to
`a CG, only the CSI of CSI processes in the K CSI processes
`with the highest K priorities is remained, and the total
`number of the A-CSI bits are determined according to the
`remained CSL
`In accordance with another aspect of the present disclo- 10
`sure, an A-CSI transmitting apparatus is provided. The
`A-CSI transmitting apparatus includes a receiving module,
`to receive an uplink grant signaling, an A-CSI report trig(cid:173)
`gering module, to determine whether an A-CSI report is
`triggered according to a CSI request field in the uplink grant
`signaling, and a transmitting module, to after determining
`the A-CSI report is triggered, determine a CSI process to be
`updated, and transmit A-CSI on an uplink CC carrying the
`A-CSI report.
`It can be seen from the technical solutions above that, in
`this present disclosure, a UE receives a configuration sig(cid:173)
`naling, determines a candidate PUCCH set corresponding to
`an ARI, receives a downlink grant signaling and downlink
`data corresponding to the downlink grant signaling, gener(cid:173)
`ates HARQ-ACK bits, performs processing for UCI bits
`including HARQ-ACK, determines the PUCCH used to
`transmit the UCI bits in the candidate PUCCH set according
`to an ARI in the downlink grant signaling, and transmits the
`UCI bits on the determined PUCCH. Thus, transmission of
`more than 22 UCI bits can be transmitted.
`The present disclosure further provides an A-CSI trans(cid:173)
`mitting method. In this method, a UE receives an uplink
`grant signaling, determines whether an A-CSI report is
`triggered according to a CSI request field in the uplink grant
`signaling, determines a CSI process to be updated after
`determining that theA-CSI report is triggered, and transmits
`A-CSI on an uplink CC carrying the A-CSI report. Thus,
`effective A-CSI transmission can be implemented.
`Other aspects, advantages, and salient features of the
`disclosure will become apparent to those skilled in the art
`from the following detailed description, which, taken in
`conjunction with the annexed drawings, discloses various
`embodiments of the present disclosure.
`
`The following description with reference to the accom-
`panying drawings is provided to assist in a comprehensive
`understanding of various embodiments of the present dis(cid:173)
`closure as defined by the claims and their equivalents. It
`includes various specific details to assist in that understand-
`15 ing but these are to be regarded as merely exemplary.
`Accordingly, those of ordinary skill in the art will recognize
`that various changes and modifications of the various
`embodiments described herein can be made without depart(cid:173)
`ing from the scope and spirit of the present disclosure. In
`20 addition, descriptions of well-known functions and con(cid:173)
`structions may be omitted for clarity and conciseness.
`The terms and words used in the following description
`and claims are not limited to the bibliographical meanings,
`but, are merely used by the inventor to enable a clear and
`25 consistent understanding of the present disclosure. Accord(cid:173)
`ingly, it should be apparent to those skilled in the art that the
`following description of various embodiments of the present
`disclosure is provided for illustration purpose only and not
`for the purpose of limiting the present disclosure as defined
`30 by the appended claims and their equivalents.
`It is to be understood that the singular forms "a," "an,"
`and "the" include plural referents unless the context clearly
`dictates otherwise. Thus, for example, reference to "a com(cid:173)
`ponent surface" includes reference to one or more of such
`35 surfaces.
`FIG. 1 is a schematic diagram illustrating a physical
`uplink control channel (PUCCH) format 3 according to an
`embodiment of the present disclosure.
`Referring to FIG. 1, it is assumed that rate matching (RM)
`40 encoding is used, the UCI bits after performing the RM
`channel encoding and the scrambling are modulated to
`obtain 24 quadrature phase-shift keying (QPSK) symbols,
`and the 24 QPSK symbols are mapped to a physical resource
`block (PRB) in uplink resources for transmission. First 12
`45 QPSK symbols are mapped to a first time slot for the
`PUCCH format 3 for transmission, and last 12 QPSK
`symbols are mapped to a second time slot for the PUCCH
`format 3 for transmission. There is a mirroring relation
`relative to a center frequency between locations of PRBs
`50 respectively used for the PUCCH format 3 transmission in
`two slots, so as to obtain a frequency diversity gain. Take the
`first time slot as an example. The 12 QPSK symbols after
`respectively multiplying by each element of an orthogonal
`cover code (OCC) are mapped to five symbols in the first
`55 time slot, wherein the length of the OCC is equal to 5.
`At present, 3rd generation partnership project (3GPP)
`organization for standardization performs standard works
`for an enhanced CA technology of aggregating more cells,
`e.g., the number of the aggregated cells can reach 32. For a
`60 UE, all configured cells may be divided into multiple cell
`groups (CGs), or there is one CG. For each CG, the UCI is
`fed back in a PUCCH on a cell, wherein the cell on which
`the UCI is fed back is similar as the Peel! in the current CA
`technology. The number of cells in each CG may exceed the
`maximum number of aggregated cells supported by the
`current CA technology. When the number of the configured
`cells is large or the size of the bundling window is large, the
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`The above and other aspects, features, and advantages of
`certain embodiments of the present disclosure will be more
`apparent from the following description taken in conjunction
`with the accompanying drawings, in which:
`FIG. 1 is a schematic diagram illustrating a physical
`uplink control channel (PUCCH) format 3 according to an
`embodiment of the present disclosure;
`FIG. 2 is a flowchart illustrating a uplink control infor(cid:173)
`mation (UCI) transmitting method according to various
`embodiments of the present disclosure;
`FIG. 3 is a schematic diagram illustrating a PUCCH
`format X according to an embodiment of the present dis(cid:173)
`closure;
`FIG. 4 is a schematic diagram illustrating a structure of a
`UCI transmitting apparatus according to various embodi(cid:173)
`ments of the present disclosure;
`FIG. 5 is a basic flowchart illustrating an aperiodic
`channel state information (A-CSI) transmitting method 65
`according to various embodiments of the present disclosure;
`and
`
`11
`
`

`

`US 10,158,461 B2
`
`7
`number of the HARQ-ACK bits to be fed back by the UE is
`large, e.g., the number of the HARQ-ACK bits is more than
`22. In addition, when the number of the configured cells is
`large, the CSI to be fed back by the UE is increased
`accordingly. In addition, the UE may transmit a SR in the 5
`uplink. For example, the number of CSI bits is more than 22.
`Accordingly, in order to support transmission of more than
`22 UCI bits, a new PUCCH format is required. Thus, a
`PUCCH format X is introduced, which will bring a series of
`effects, and a UCI transmitting method will be designed 10
`accordingly.
`An uplink control information (UCI) transmitting method
`is provided according to various embodiments of the present
`disclosure.
`FIG. 2 is a flowchart illustrating a UCI transmitting 15
`method according to various embodiments of the present
`disclosure.
`Referring to FIG. 2, the method includes procedures as
`follows.
`At operation 201, a user equipment (UE) receives a
`configuration signaling, and determines a candidate physical
`uplink control channel (PUCCH) set corresponding to an
`acknowledgement
`(ACK)/negative
`acknowledgement
`(NACK) resource indication (ARI).
`In particular, the candidate PUCCH set is semi-statically
`configured through a signaling such as a radio resource
`control (RRC) signaling, and the candidate PUCCH set
`corresponds to the ARI. When hybrid automatic repeat
`request ACK (HARQ-ACK) is to be fed back in a subframe,
`a PUCCH used to transmit the HARQ-ACK and additional
`information in UCI may be dynamically indicated by the
`2-bit ARI in a downlink grant signaling in the candidate
`PUCCH set.
`At operation 202, the UE receives a downlink grant
`signaling and downlink data corresponding to the downlink
`grant signaling, and generates HARQ-ACK bits.
`The downlink grant signaling received by the UE includes
`the ARI used to indicate the PUCCH.
`At operation 203, the UE performs processing for the UCI
`bits including the HARQ-ACK, determines the PUCCH 40
`used to transmit the UCI bits in the candidate PUCCH set
`according to the ARI in the downlink grant signaling, and
`transmits the UCI bits on the determined PUCCH.
`Various embodiments of the present disclosure are
`described as follows.
`First Embodiment
`In a carrier aggregation (CA) system, a PUCCH format 3
`supports transmission of at most 22 UCI bits. In order to feed
`more UCI bits back on a PUCCH, a new PUCCH format is
`defined, which is referred to as a PUCCH format X here(cid:173)
`inafter. In this embodiment, a UCI transmitting method by
`using the PUCCH format X is described, i.e., a method for
`implementing procedures in block 203 when the PUCCH
`format Xis used in FIG. 2.
`The PUCCH format X may be obtained by extending the
`PUCCH format 3. A possible method includes ensuring that
`an orthogonal cover code (OCC) extension structure of the
`PUCCH format 3 is not changed (i.e., a length of the OCC
`is not changed), and increasing the number of physical
`resource blocks (PRBs) used in a frequency domain to
`support more UCI bits. For example, it is assumed that the
`PUCCH format X may use N PRBs, thus, may carry about
`22N UCI bits. Another extending method includes ensuring
`that one PRB is used in the frequency domain, and decreas(cid:173)
`ing the length of the OCC. For example, a 2-bit OCC is used
`to support more UCI bits. Alternatively, the number of the
`used PRBs is increased, and the length of the OCC is
`
`8
`decreased, so as to support more UCI bits. According to any
`of the three methods above, after encoding, rate matching
`(RM), scrambling and modulating are respectively per-
`formed for the UCI bits, modulation symbols are mapped to
`uplink single-carrier f