[go: up one dir, main page]

WO2019068266A1 - Transmission de liaison montante basée sur un livre-code dans des communications sans fil - Google Patents

Transmission de liaison montante basée sur un livre-code dans des communications sans fil Download PDF

Info

Publication number
WO2019068266A1
WO2019068266A1 PCT/CN2018/109347 CN2018109347W WO2019068266A1 WO 2019068266 A1 WO2019068266 A1 WO 2019068266A1 CN 2018109347 W CN2018109347 W CN 2018109347W WO 2019068266 A1 WO2019068266 A1 WO 2019068266A1
Authority
WO
WIPO (PCT)
Prior art keywords
codebook
signaling
permutations
permutation
processor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/109347
Other languages
English (en)
Inventor
Weidong Yang
Tzu-Han Chou
Chao-Cheng Su
Lung-Sheng Tsai
Bo-Si CHEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MediaTek Inc
Original Assignee
MediaTek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MediaTek Inc filed Critical MediaTek Inc
Priority to CN201880004890.XA priority Critical patent/CN110100407B/zh
Publication of WO2019068266A1 publication Critical patent/WO2019068266A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present disclosure is generally related to wireless communications and, more particularly, to codebook-based uplink (UL) transmission in wireless communications.
  • UL uplink
  • 5G 5th-Generation
  • NR New Radio
  • DFT-OFDM discrete Fourier transformation OFDM
  • CP-OFDM cyclic-prefix orthogonal frequency-division multiplexing
  • the present disclosure proposes a number of solutions, schemes, methods and apparatus pertaining to codebook-based uplink transmission in wireless communications.
  • a codebook may be designed to be robust for diverse scenarios.
  • the codebook may cover a number of targeted codebooks which were optimized for specific antenna configurations and/or scenarios (e.g., Rel-8 DL 4Tx rank 2 codebook, rank 2 mutually unbiased bases (MUB) extension from Rel-10 UL 4Tx rank 1 codebook and Rel-15 DL NR 4Tx rank 2 codebook) . It is believed that the proposed solutions, schemes, methods and apparatus may reduce transmission overhead, improve system performance, and reduce power consumption by UEs.
  • MUB mutually unbiased bases
  • a method may involve a processor of a user equipment (UE) storing information with respect to a plurality of permutations with respect to a mapping between a plurality of sounding reference signal (SRS) resources and a plurality of antenna ports at the UE.
  • the method may also involve the processor receiving signaling from a network node of a wireless network, with the signaling comprising an index identifying a permutation among the plurality of permutations.
  • the method may further involve the processor performing an uplink transmission of data to the network node using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.
  • an apparatus may include a transceiver and a processor coupled to the transceiver.
  • the transceiver may be capable of wirelessly communicating with a network node of a wireless network.
  • the processor may be capable of: (a) storing, in a memory, information with respect to a plurality of permutations with respect to a mapping between a plurality of SRS resources and a plurality of antenna ports at the transceiver; (b) receiving, via the transceiver, signaling from a network node of a wireless network, with the signaling containing an index identifying a permutation among the plurality of permutations; and (c) performing, via the transceiver, an uplink transmission of data to the network node using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.
  • radio access technologies such as5G/NR mobile communications
  • the proposed concepts, schemes and any variation (s) /derivative (s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies wherever applicable such as, for example and without limitation, LTE, LTE-Advanced, LTE-Advanced Pro, Internet-of-Things (IoT) and Narrow Band Internet of Things (NB-IoT) .
  • LTE Long Term Evolution
  • LTE-Advanced Long Term Evolution-Advanced
  • LTE-Advanced Pro Internet-of-Things
  • NB-IoT Narrow Band Internet of Things
  • FIG. 1 is a diagram of an example message chain of a procedure for UL codebook-based transmission involving a UE and a network node in accordance with the present disclosure.
  • FIG. 2 is a diagram of an example concept in accordance with the present disclosure.
  • FIG. 3 is a diagram of an example concept in accordance with the present disclosure.
  • FIG. 4 is a diagram of an example concept in accordance with the present disclosure.
  • FIG. 5 is a diagram of a proposed rank 1 codebook design in accordance with the present disclosure.
  • FIG. 6 is a diagram of example scenarios in accordance with the present disclosure.
  • FIG. 7 is a diagram of a proposed rank 2 codebook design in accordance with the present disclosure.
  • FIG. 8 is a diagram of an example scenario in accordance with the present disclosure.
  • FIG. 9 is a diagram of an example scenario in accordance with the present disclosure.
  • FIG. 10 is a diagram of an example scenario in accordance with the present disclosure.
  • FIG. 11 is a diagram of an example wireless communication environment in accordance with an implementation of the present disclosure.
  • FIG. 12 is a flowchart of an example process in accordance with an implementation of the present disclosure.
  • FIG. 13A and FIG. 13B respectively shows a table of example rank 1 precoders in a codebook in accordance with an implementation of the present disclosure.
  • FIG. 14A, FIG. 14B, FIG. 14C and FIG. 14D respectively shows a table of example rank 2 precoders in a codebook in accordance with an implementation of the present disclosure.
  • Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and/or solutions pertaining to codebook-based uplink transmission in wireless communications.
  • a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
  • the present disclosure proposes a number of approaches and/or schemes, described below, to design rank 2 and higher-rank codebooks so the codebook subsumes LTE Rel-10 UL four-transmitter (4Tx) codebook and NR Rel-15 DL 4Tx codebook.
  • chordal distance between two precoders A and B is given by the norm of the matrix AA H -BB H , where the subscript H is for the Hermitian operator.
  • the phrase “chordal-distance equivalent” is used to refer to two codewords in an event that their chordal distance is 0.
  • a first codebook (codebook 1) may be deemed to “cover” a second codebook (codebook 2) in an event that, for any codeword in codebook 2, there is a chordal-distance equivalent codeword in codebook 1.
  • chordal-distance equivalent is used to refer to two codebooks in an event that, for any codeword in either of the two codebooks, there is a chordal-distance equivalent codeword in another codebook. In other words, they may cover each other.
  • the UL codebook In 5G/NR mobile communications, diverse scenarios can be encountered in the application of the UL codebook, including RPD, non-common mode phase noise, antenna gain imbalance (AGI) and the like. It is desirable that a NR UL codebook can support these scenarios besides uniform linear array (ULA) and non-ULA antenna configurations.
  • the codebook may have all the codewords from LTE Rel-10 UL 4Tx codebook and NR Rel-15 DL 4Tx codebook.
  • a dual-stage codebook structure may be adopted, with a first construction ( “Construction 1” ) or a second construction ( “Construction 2” ) , as explained below.
  • the allowed range for each parameter can be restricted with CSR.
  • CSR CSR
  • the following CSBR may be taken: limiting beam selection (i, j) to (1, 1) , (2, 2) (e.g., (1, 2) and (2, 1) are not allowed) .
  • e i is a L ⁇ 1 vector with 1 at element i and zeros elsewhere.
  • Arank 1 precoder may be given by:
  • (i, j) (1, 1) , (2, 2) , (3, 3) , (4, 4) , (1, 3) , (3, 1) , (2, 4) , (4, 2) , and ⁇ n takes a value from 1, j, -1, -j.
  • QPSK quadrature phase-shift keying
  • CBSR may be also used to reduce signaling overhead and recover the NR DL 4Tx codebook and Rel-10 UL 4Tx codebook.
  • co-phasing values may be limited to ⁇ j, -j ⁇ .
  • co-phasing values may be limited to ⁇ 1, -1 ⁇ .
  • beam selection (i, j) may be limited to (1, 1) , (2, 2) , (3, 3) and (4, 4) .
  • one out of four antennas may be turned off.
  • eight rank 1 codewords with 0 at port 1 may be obtained (e.g., by putting 0 at the first element)
  • eight rank 1 codewords with 0 at port 2 may be obtained (e.g., by putting 0 at the second element) , and so on.
  • sixty-four rank 1 codewords may be obtained. It is noteworthy that, by setting 0 to the k elements in the sixteen rank 1 precoders from construction 1, sixteen codewords may be obtained, with eight of the sixteen codewords being unique.
  • two out of four antennas may be turned off.
  • the UE may turn off antennas 1 and 2, or antennas 1 and 3, and so on.
  • RPD or non-common phase noise are present, some combinations may not be necessary.
  • port combining across coherence group may not be supported and, consequently, the UE may not support port combining such as antennas 2 and 4.
  • a k is the k-th column of the following matrix:
  • additional may be constructed as follows:
  • B n may be defined as:
  • a resultant codebook may have a large size.
  • a number of approaches may be taken to minimize, reduce or otherwise control the signaling overhead. For instance, all the precoders for the one-antenna turn-off case may be removed. Additionally, or alternatively, co-phasing for the two-antenna turn-off case may be limited to 1 and -1 for cross-coherence group cases (e.g., only [1 01 0] or [1 0 -1 0] is supported) . Additionally, or alternatively, there may be no co-phasing for a three-antenna turn-off case. Additionally, or alternatively, conditional codebook usage may be considered.
  • the actual precoder used by the UE may be modified according to signaling of the base station/network node (e.g., gNB) , which may be dynamic and/or semi-statical) over the codewords given in the specification (e.g., in TS 38.214) .
  • the base station/network node e.g., gNB
  • the codewords given in the specification (e.g., in TS 38.214) .
  • the actual precoder used by a UE may be modified according to signaling from a base station (e.g., via dynamic and semi-statical signaling) over the codewords given in the specification (e.g., in TS 38.214) .
  • a base station e.g., gNB
  • the base station may signal to the UE semi-statically through RRC signaling or MAC CE, so that the UE would not use certain antenna (s) .
  • the base station may signal to the UE using a bitmap where each “0” in the bitmap indicates turn-off for the corresponding antenna port at the UE (e.g., a bitmap of [1 0 1 0] instructs the UE to turn off the second and the fourth antennas among four antennas at the UE) .
  • a bitmap of [1 0 1 0] instructs the UE to turn off the second and the fourth antennas among four antennas at the UE
  • PMI precoding matrix indicator
  • W 1 potentially may also be included in the semi-statical signaling/MAC CE.
  • a base station may take measures such as SRS-based RPD calibration to see whether necessary remedy steps would be adequate to remove coherence group constraint pertaining to coherence transmission capability of antennas at the UE.
  • SRS-based RPD calibration As a base station may perform SRS calibration based on SRS, this may be expanded to demodulation reference signal (DMRS) from the UE.
  • DMRS demodulation reference signal
  • the base station may signal the same transmitted PMI (TPMI) for the UE and use different physical uplink shared channel (PUSCH) transmit power levels to calibrate RPD behavior of the UE.
  • TPMI transmitted PMI
  • PUSCH physical uplink shared channel
  • the base station may indicate to the UE to use a precoder with phase rotation with respect to the precoder extracted from the SRS/DMRS transmission from the UE.
  • the base station may signal a codebook constraint to the UE.
  • the meaning of the codebook e.g., constructed from Construction 1 or Construction 2 may be modified.
  • antenna ports in a coherence group may come from non-adjacent indices (e.g., ports 1 and 3 in coherence group 1, and ports 2 and 4 in coherence group 2) , a similar procedure may also be feasible.
  • re-indexing may be considered to allow arbitrary antenna-coherence group definitions.
  • the precoder may be given an index as follows:
  • I (k, i, j, n) k ⁇ 2 ⁇ 2 ⁇ 4+ (i-1) ⁇ 2 ⁇ 4+ (j-1) ⁇ 4+n, 1 ⁇ i, j ⁇ 2, 0 ⁇ n ⁇ 3, 0 ⁇ k ⁇ 3.
  • precoders with indices 0, 8, 16, 24, 32, 40, 48 and 56 may be used for port combination (1, 2) , 1, 9, 17, 25, 33, 41, 49 and 57 for the port combination (, 3) , and so on, with the understanding that the first two elements may be for the relevant antennas.
  • the precoder [1, -1, j, j] T is specified, as it is associated with the port combination (1, 3) , then 1 is applied to port 1, and -1 is applied to port 3, with ports 2 and 4 turned off.
  • the base station can configure a bitmap for the addressable precoders for dynamic signaling. For example, even though there are more than 64 precoders under beam group k, the base station may configure a bitmap so the total addressable precoders are limited to no more than 64, then six bits for W 2 is possible.
  • a rank 2 codebook structure may begin from NR as follows:
  • the base station may provide to the UE a TPMI which may be mapped to a rank 2 codeword as follows (with unit amplitude for each element and phase in degrees) :
  • the UE may understand it as follows:
  • X denotes no transmission for the specified layer at the given antenna port.
  • the UE does not user ports 3 and 4 for layer 1, and the UE does not use ports 1 and 2 for layer 2.
  • the modification mask ( [1 X; 1 X; X 1 X 1] as used in this example) may be provided by the base station for all codewords or, alternatively, different modification masks may be used for codewords. It can be verified that most of the PAPR preserving rank 2 codewords from Rel-10 4Tx UL can be generated through applying a mask to the NR Rel-15 4Tx DL codewords at rank 2.
  • the codebooks for different purposes may be embedded in a single codebook and the meaning taken at a UE may be modified according to the signaling from the base station (e.g., via RRC signaling and/or MAC CE) .
  • the applied precoder may be a result of dynamic signaling and semi-statical signaling, including possible CSR.
  • Rel-10 UL 4Tx codebook uses MUBs to construct rank 1 codewords, and different design principles and considerations were used to construct codewords for rank 2, rank 3 and rank 4. Under a proposed scheme in accordance with the present disclosure, rank 1 codewords according to Rel-10 UL 4Tx codebook can be used through the Householder transformation to construct rank 1, rank 2, rank 3 and rank 4 codewords.
  • one vector q k may be chosen to construct a 4 ⁇ 4 precoder.
  • the third vector may be chosen and may be denoted as follows:
  • Householder transformation may be applied on q k to obtain the 4 ⁇ 4 precoder as follows:
  • e i be the 4 ⁇ 1 vector with zeros at all elements except element i, with the value at element i being 1. Then, four rank 1 precoders may be generated for MUB k as follows:
  • rank 2 precoders may be generated for MUB k as follows:
  • chordal distance metric e.g., choosing precoders with a chordal distance less than a predefined value
  • achord distance profile for all rank 2 precoders constructed thereby from M 1 , ..., M 4 may compare favorably with (e.g., shorter than) that for the rank 2 precoders from Rel-8 DL 4Tx codebook.
  • rank 3 precoders may be generated for MUB k as follows:
  • one rank 4 precoder may be generated for MUB k as follows:
  • W (k) may take the role of W 1 and, additionally, [e i ...e l ] may take the role of W 2 .
  • each orthogonal basis with alphabet ⁇ 1, -1, j, -j ⁇ may be represented by a collection of column vectors as follows:
  • the four MUBs used previously may be expressed as follows:
  • phase rotations may be applied to P 1 , ..., P 4 , for example, as follows:
  • M 1 , ..., M 8 may be used in the codebook construction.
  • a rank 2 precoder may be given by:
  • a rank 2 precoder may be given by:
  • a codebook may be defined as follows:
  • a rank 2 precoder may be given by:
  • codewords resulted from them are chordal-distance equivalent with codewords resulted from It is noteworthy that, in all the constructions, some codewords may be taken out (e.g., not requiring to cover all codewords from an existing codebook) . Moreover, additional codewords may be included. In the NR DL 4Tx codebook design, may be included along with even though they generate chordal-distance equivalent codewords. A similar practice may be adopted here and C (k) may include more matrices.
  • a codebook construction may be pursued as an antenna port re-indexing.
  • permutation matrices may be introduced in the codebook construction.
  • an enlarged codebook may be given by where 1 ⁇ k 1 ⁇ K, and denotes a permutation matrix.
  • the following permutation matrices may be applied to the rank 2 precoder
  • a beam group may be determined by k and the permutation matrix index.
  • the permutation matrix index may be determined in a long-term basis (e.g., through radio resource control (RRC) signaling and/or media access control (MAC) control element (CE) as part of codebook subset restriction (CSR) or independent of CSR) , so the feedback overhead of the enlarged codebook may remain unchanged compared to the original codebook (e.g., NR DL 4Tx codebook) .
  • RRC radio resource control
  • MAC media access control
  • CE control element
  • the original codebook e.g., NR DL 4Tx codebook
  • the Rel-8 rank 2 4Tx codebook and Rel-15 NR rank 2 4Tx codebook are covered by the proposed design.
  • permutation matrices may be identified to enlarge the codebook.
  • applying permutation matrices to an existing or a first codebook to obtain an enlarged or second codebook may be treated as a generic way to handle irregular antenna configuration.
  • a number of permutation matrices and may be used to enlarge the codebook such as
  • FIG. 13A and FIG. 13B respectively shows a table of example rank 1 precoders in a codebook in accordance with an implementation of the present disclosure.
  • FIG. 14A, FIG. 14B, FIG. 14C and FIG. 14D respectively shows a table of example rank 2 precoders in a codebook in accordance with an implementation of the present disclosure.
  • FIG. 1 illustrates an example message chain of a procedure 100 for UL codebook-based transmission involving a UE 110 and a network node 120 in accordance with the present disclosure.
  • UE 110 transmits a reporting to network node 120 about Tx-chain coherence grouping, analog beam grouping and simultaneous transmission grouping.
  • network node 120 transmits signaling to UE 110 to configure SRS resources and an SRS resource indicator (SRI) , transmitted rank indicator (TRI) and/or precoding matrix indicator (PMI) mapping table (including possible codebook subset restriction) at UE 110.
  • SRI SRS resource indicator
  • TRI transmitted rank indicator
  • PMI precoding matrix indicator
  • network node 120 may configure SRS transmission parameters for RPD probing and calibration.
  • UE 110 may perform SRS transmission to network node 120 for RPD calibration.
  • network node 120 may transmit signaling to UE 110 to reconfigure an SRI/TRI/TPMI mapping table (including possible codebook subset restriction) .
  • UE 110 may perform transmission from SRS resources for UL channel state information (CSI) acquisition.
  • network node 120 may transmit signaling to UE 110 for PUSCH scheduling with SRI/TRI/TPMI signaling in an UL downlink control information (DCI) .
  • DCI downlink control information
  • UE 110 may look up a codebook according to the SRI/TRI/TPMI signaling from network node 120, and UE 110 may apply a precoder for the codebook according to the signaled PMI.
  • a first option (option 1) , the concept of coherence group may be used in the definition of a codebook, but the SRI/TRI/TPMI signaling design may support dynamically indicated selection of a codeword from any codebook.
  • FIG. 2 illustrates an example concept 200 of option 1 in accordance with the present disclosure.
  • the port-selection codebook and port-selection-and-combining codebook may be recursively constructed codebooks.
  • a network node e.g., gNB
  • dynamic signaling with an UL DCI may be used to select one or more codewords from a codebook specifically defined for that coherence group configuration.
  • FIG. 3 illustrates an example concept 300 of option 2 in accordance with the present disclosure.
  • a network node may signal a coherence group configuration through RRC or MAC CE to a UE.
  • the port-selection codebook may offer useful support for antenna gain imbalance (AGI)
  • the codebook with four coherence groups may be supported with the case of two coherence group configuration and the case of one coherence group, respectively.
  • FIG. 4 illustrates an example concept 400 of option 3 in accordance with the present disclosure.
  • port-selection codebook may be used jointly with port-combining codebook or the recursively constructed codebook with two coherence groups.
  • the network node may signal a codeword from the port-selection codebook or the port-combining codebook dynamically.
  • a precoder selection at a base station/network node may not be constrained by the coherence group signaling from a UE (e.g., option 1 and option 3) .
  • the concept of coherence group may be used in the definition of a codebook, but the SRI/TRI/TPMI signaling design may support dynamically indicated selection of a codeword from any codebook. This may be important and beneficial in addressing UL transmission power issues.
  • a desirable 5G/NR UL codebook may cover all the codewords from LTE Rel-10 UL 4Tx codebook and NR Rel-15 DL 4Tx codebook.
  • FIG. 5 illustrates a proposed rank 1 codebook design 500 in accordance with the present disclosure.
  • the proposed rank 1 codebook design 500 may cover Rel-8 four-Tx DL codebook, Rel-10 four-Tx UL codebook and Rel-15 four-Tx DL codebook.
  • Arank 1 precoder may be given by:
  • e i is a L ⁇ 1 vector with 1 at element i and zeros elsewhere.
  • some CSR may be taken.
  • a CSR may be taken.
  • beam selection (i, j) may be limited to (1, 1) , (2, 2) .
  • (1, 2) and (2, 1) may not be allowed.
  • FD-MIMO frequency division multiple-input-and-multiple-output
  • FIG. 6 illustrates example scenarios 600A and 600B in accordance with the present disclosure.
  • scenario 600A depicts an example ULA response, where a signal emitting from a signal source impinges a uniform linear array.
  • the signal model is formulated for receive as often used in array signal processing.
  • the signal model for transmit can be formulated similarly.
  • the phase difference among receivers x i , 1 ⁇ i ⁇ N, may be determined by the projections d i of antenna positions to the wave propagation direction.
  • the array response vector may be determined by the phase profile d 1 , d 2 , ...and d N :
  • the phase difference is also uniform.
  • DFT beams may be used to match the phase difference.
  • high-gain coherent transmissions and receptions may be achieved.
  • an irregular antenna placement may arise as shown in scenario 600B.
  • the differences between neighboring projections d i may be non-uniform, and it may be difficult to use any DFT beam to approximate P (d 1 , d 2 , ..., d N ) directly.
  • the phase profile may be better approximated by re-arranging d 1 , d 2 , ...and d N .
  • P (d N , d 1 , d 2 , ..., d N-1 ) well with a DFT beam while P (d 1 , d 2 , ..., d N ) is not well approximated by any DFT beam.
  • a premutation of the antenna ports in this case may be helpful.
  • a first codebook (e.g., a dual-stage codebook):
  • i 1, 1 , i 1, 2 , i 1, 3 , i 2 as in TS 38.214 (V. 0.1.2 September 2017)
  • the enlarged codebook has P times as many codewords as the first codebook.
  • the procedure that generates a second codebook from a first codebook may be referred to as “port permutation. ”
  • the larger codebook resulted from port permutation may cover as many entries as possible from Rel-8 DL codebook design and Rel-15 NR DL codebook design as well as the MUB extension from Rel-10 UL codebook.
  • the design space includes two parts: (1) the choice of the first codebook and (2) the choice of port permutations. Accordingly, two constructions ( “Construction A” and “Construction B” ) as shown in the table below may be provided.
  • FIG. 7 illustrates a proposed rank 2 codebook design 700 in accordance with the present disclosure.
  • Construction A or Construction B covers Rel-8 4Tx DL codebook, extension from Rel-10 4Tx UL codebook and Rel-15 4Tx DL codebook.
  • permutation (1423)
  • the definition of may be the same as in NR DL 4Tx codebook.
  • ⁇ (i 2, 1 , i 2, 2 ) mod (i 2, 1 +i 2, 2 , 2) , 0 ⁇ i 2, 1 , i 2, 2 ⁇ 1 ⁇ .
  • chordal-distance equivalent codewords it is unnecessary to include both and for as they generate chordal-distance equivalent codewords, and either one is sufficient. Also, it is unnecessary to include both and for as they generate chordal-distance equivalent codewords.
  • SRS resources 1, 2, 3 and 4 may be aggregated to be used together with a 4Tx codebook.
  • a single implicit mapping from those SRS resources to codebook antenna ports may be assumed. In view of the above, it may not be sufficient to assume a single order for SRS resources to provide good support to diverse antenna placement scenarios.
  • the network node e.g., gNB
  • the network node may indicate that SRS resources 1, 2, 3 and 4 are used for a signaled PMI.
  • the network node may signal that SRS resources 1, 2, 3 and 4 are mapped to ports 1, 2 3 and 4 (e.g., through the signaling of a list of SRIs or index to that list: (1, 2, 3, 4) ) .
  • the network node may signal that SRS resources 1, 3, 2 and 4 are mapped to ports 1, 2, 3 and 4 (e.g., through the signaling of a list of SRIs or index to that list: (1, 3, 2, 4) ) .
  • FIG. 8 and FIG. 9. illustrates an example scenario 800 of port permutation (1234) indication from SRI signaling.
  • FIG. 9 illustrates an example scenario 900 of port permutation (1324) indication from SRI signaling.
  • the network node e.g., gNB
  • the network node may indicate that SRS resources 1, 2, 3 and 4 are used for the signaled PMI.
  • the network node may signal the permutation of SRS resources (e.g., (1, 2, 3, 4) or (1, 3, 2, 4) to the UE) , and the PMI may be for the first codebook.
  • the permutation may be integrated in the PMI definition, and the PMI may be for the second codebook.
  • FIG. 10 illustrates an example scenario 1000 of port permutation as an integral part of the codebook definition.
  • the network node e.g., gNB
  • the network node may indicate an SRS resource with ports 1, 2, 3 and 4 for a signaled PMI.
  • the network node may signal the permutation of SRS ports (e.g., (1, 2, 3, 4) or (1, 3, 2, 4) to the UE) , and the PMI may be for the first codebook.
  • the permutation of SRS ports may be integrated in the PMI definition, and the PMI may be for the second codebook.
  • a single UE may not need all possible permutations at once since some limited SRS resource/port combinations or permutations (e.g., (1, 2, 3, 4) or (1, 3, 2, 4) ) may be configured through RRC signaling or MAC IE.
  • some limited SRS resource/port combinations or permutations e.g., (1, 2, 3, 4) or (1, 3, 2, 4)
  • a base station may dynamically signal to a UE an index to the SRI permutations in the UL DCI.
  • the index may be linked to an SRS resource/port permutation.
  • a similar index can be also used to reduce signaling overhead.
  • the base station may indicate to the UE (e.g., in RRC signaling and/or MAC CE) that only two permutations (in the example (1, 2, 3, 4) and (1, 3, 2, 4) ) are used.
  • the signaling overhead for port permutations may be reduced from 2 bits to 1 bit.
  • an index in the DCI/MAC CE pointing to SRI combination (not limited to the permutation case considered here) rather than an enumeration of SRIs may be an effective way to reduce signaling overhead.
  • Construction B may be a more reasonable choice between Construction A and Construction B to be adopted for NR UL 4Tx rank 2 codebook.
  • case 1 In a first case ( “case 1” ) , with no coherence among Tx chains, two ports out of four ports may be chosen for rank 2 transmission.
  • rank 2 transmission may come from the same coherence group.
  • the two-transmitter (2Tx) codebook for rank 2 may be applied.
  • rank 2 2Tx precoder assuming the same construction for 2Tx UL codebook
  • one spatial layer transmission may come from coherence group 1, with another spatial layer group from coherence group 2.
  • rank 1 precoders over 2Tx may be used over each coherence group.
  • four precoders already covered in case 1 are excluded.
  • CSR according to coherence group may provide saving.
  • one coherence group without the AGI issue e.g., case 5
  • ceil (log2 (16) ) 4 bits would be needed.
  • 3 bits can be saved compared to the case with a fixed TPMI size of 7 bits.
  • ceil (log2 (16+8) ) 5 bits would be needed.
  • 2 bits can be saved compared to the case with a fixed TPMI size of 7 bits.
  • the base station may select useful codewords accordingly.
  • the proposed dual-stage codebook may include codewords for ULA and non-ULA antenna configurations.
  • the base station may settle with one group (e.g., codewords for ULA) to reduce the signaling overhead.
  • CSR may become a very useful tool to reconcile two somewhat conflicting design goals, namely: (1) having as many codewords as possible to cover diverse scenarios, and (2) having as few codewords as possible to minimize PMI-related signaling overhead.
  • a base station may be capable of signaling to a UE a codebook subset restriction with a bitmap for an UL codebook through RRC signaling.
  • the length of the bitmap may be equal to a number of precoders in the codebook.
  • FIG. 11 illustrates an example wireless communication environment 1100 in accordance with an implementation of the present disclosure.
  • Wireless communication environment 1100 may involve a communication apparatus 1110 and a network apparatus 1120 in wireless communication with each other.
  • Each of communication apparatus 1110 and network apparatus 1120 may perform various functions to implement procedures, schemes, techniques, processes and methods described herein pertaining to codebook-based uplink transmission in wireless communications, including the various procedures, scenarios, schemes, solutions, concepts and techniques described above as well as process 1200 described below.
  • communication apparatus 1110 may be an example implementation of UE 110 in procedure 100
  • network apparatus 1120 may be an example implementation of network node 120 in procedure 100.
  • Communication apparatus 1110 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus.
  • communication apparatus 1110 may be implemented in a smart phone, a smart watch, a personal digital assistant, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer.
  • communication apparatus 1110 may also be a part of a machine type apparatus, which may be an IoT or NB-IoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a wire communication apparatus or a computing apparatus.
  • communication apparatus 1110 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center.
  • communication apparatus 1110 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction-set-computing (RISC) processors or one or more complex-instruction-set-computing (CISC) processors.
  • IC integrated-circuit
  • Communication apparatus 1110 may include at least some of those components shown in FIG. 11 such as a processor 1112, for example.
  • Communication apparatus 1110 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of communication apparatus 1110 are neither shown in FIG. 11 nor described below in the interest of simplicity and brevity.
  • Network apparatus 1120 may be a part of an electronic apparatus, which may be a network node such as a TRP, a base station, a small cell, a router or a gateway.
  • network apparatus 1120 may be implemented in an eNodeB in an LTE, LTE-Advanced or LTE-Advanced Pro network or in a gNB in a 5G, NR, IoT or NB-IoT network.
  • network apparatus 1120 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more RISC processors, or one or more CISC processors.
  • Network apparatus 1120 may include at least some of those components shown in FIG. 11 such as a processor 1122, for example.
  • Network apparatus 1120 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of network apparatus 1120 are neither shown in FIG. 11 nor described below in the interest of simplicity and brevity.
  • each of processor 1112 and processor 1122 may be implemented in the form of one or more single-core processors, one or more multi-core processors, one or more RISC processors, or one or more CISC processors. That is, even though a singular term “aprocessor” is used herein to refer to processor 1112 and processor 1122, each of processor 1112 and processor 1122 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure.
  • each of processor 1112 and processor 1122 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and/or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure.
  • each of processor 1112 and processor 1122 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks pertaining to codebook-based uplink transmission in wireless communications in accordance with various implementations of the present disclosure.
  • communication apparatus 1110 may also include a transceiver 1116 coupled to processor 1112 and capable of wirelessly transmitting and receiving data, signals and information.
  • transceiver 1116 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports.
  • communication apparatus 1110 may further include a memory 1114 coupled to processor 1112 and capable of being accessed by processor 1112 and storing data therein.
  • network apparatus 1120 may also include a transceiver 1126 coupled to processor 1122 and capable of wirelessly transmitting and receiving data, signals and information.
  • network apparatus 1120 may further include a memory 1124 coupled to processor 1122 and capable of being accessed by processor 1122 and storing data therein. Accordingly, communication apparatus 1110 and network apparatus 1120 may wirelessly communicate with each other via transceiver 1116 and transceiver 1126, respectively.
  • each of communication apparatus 1110 and network apparatus 1120 is provided in the context of a mobile communication environment in which communication apparatus 1110 is implemented in or as a communication apparatus or a UE and network apparatus 1120 is implemented in or as a network node (e.g., gNB or TRP) of a wireless network (e.g., 5G/NR mobile network) .
  • a network node e.g., gNB or TRP
  • a wireless network e.g., 5G/NR mobile network
  • processor 1112 of communication apparatus 1110 may store, in memory 1114, information with respect to a plurality of permutations with respect to a mapping between a plurality of SRS resources and a plurality of antenna ports at communication apparatus 1110. Moreover, processor 1112 may receive, via transceiver 1116, signaling from network apparatus 1120. The signaling may contain an index identifying a permutation among the plurality of permutations. Furthermore, processor 1112 ma perform, via transceiver 1116, an uplink transmission of data to network apparatus 1120 using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.
  • the index may include one or more binary bits.
  • a quantity of the one or more binary bits may correspond to a number of permutations of the plurality of permutations that are available. For instance, when the number of permutations of the plurality of permutations that are available is 2, the index may include 1 bit. Moreover, when the number of permutations of the plurality of permutations that are available is 4, the index may include 2 bits.
  • in receiving the signaling processor 1112 may receive an RRC signal or an MAC CE.
  • in receiving the signaling processor 1112 may receive UL DCI.
  • processor 1112 may construct a codebook comprising a plurality of precoders. Moreover, processor 1112 may process the data using the codebook prior to performing the uplink transmission of the data. In some implementations, in constructing the codebook, processor 1112 may select a candidate precoder from a single-stage codebook or a dual-stage codebook and performing a permutation on the candidate precoder.
  • in performing the permutation on the candidate precoder processor 1112 may perform a plurality of permutations on the candidate precoder to construct the codebook.
  • the plurality of permutations may cover a plurality of mutually unbiased bases, a plurality of codebooks specified in 3GPP specifications, or a combination thereof.
  • processor 1112 may select an original codebook from a plurality of codebooks specified in 3GPP specifications. Moreover, processor 1112 may enlarge the original codebook by performing one or more permutations on the original codebook with one or more permutation matrices to obtain the codebook. In some implementations, a feedback overhead of the codebook may remain unchanged compared to a feedback overhead of the original codebook.
  • processor 1112 may select a permutation matrix from a plurality of permutation matrices. Additionally, processor 1112 may apply the permutation matrix to the candidate precoder to enlarge the candidate precoder.
  • in selecting the permutation matrix processor 1112 may dynamically or semi-statically receive signaling from network apparatus 1120 indicating selection of the permutation matrix for constructing the codebook.
  • in receiving the signaling processor 1112 may receive RRC signaling or an MAC CE as part of codebook subset restriction (CSR) or independent of the CSR.
  • CSR codebook subset restriction
  • processor 1112 may select the permutation matrix based on an indication that is an integral part of the codebook.
  • each of the plurality of permutation matrices may correspond to respective one or more antenna placement scenarios or one or more codewords.
  • the candidate precoder may include a rank 2 precoder.
  • processor 1112 may receive, via transceiver 1116, further signaling from network apparatus 1120 indicating an order in which the plurality of SRS resources are mapped to the plurality of antenna ports at communication apparatus 1110 for a subsequent uplink transmission.
  • each of one or more of the antenna ports may be configurable to be mapped to any SRS resource of the plurality of SRS resources for the subsequent uplink transmission using the codebook.
  • the further signaling may indicate one of the plurality of permutations with respect to the order in which the plurality of SRS resources are mapped to the plurality of antenna ports.
  • the plurality of antenna ports may be fixedly mapped to the plurality of SRS resources for the subsequent uplink transmission using the codebook.
  • the further signaling may include a precoding matrix indicator (PMI) , and the one of the plurality of permutations may be an integral part of in a PMI definition with respect to the PMI.
  • PMI precoding matrix indicator
  • processor 1112 may receive, via transceiver 1116, further signaling from network apparatus 1120 indicating a CSR with respect to the codebook. Moreover, processor 1112 may select, by the processor based on the CSR, one or more codewords in the codebook. In some implementations, in transmitting the processed data to network apparatus 1120 processor 1112 may transmit the processed data to network apparatus 1120 using the one or more codewords.
  • a processor 1112 in receiving the further signaling from network apparatus 1120 indicating the CSR processor 1112 may receive the CSR with a bitmap through RRC signaling. In some implementations, a length of the bitmap may equal a number of precoders in the codebook.
  • FIG. 12 illustrates an example process 1200 in accordance with an implementation of the present disclosure.
  • Process 1200 may be an example implementation of the various procedures, scenarios, schemes, solutions, concepts and techniques, or a combination thereof, whether partially or completely, with respect to codebook-based uplink transmission in wireless communications in accordance with the present disclosure.
  • Process 1200 may represent an aspect of implementation of features of communication apparatus 1110.
  • Process 1200 may include one or more operations, actions, or functions as illustrated by one or more of blocks1210, 1220 and 1230. Although illustrated as discrete blocks, various blocks of process 1200 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 1200 may executed in the order shown in FIG.
  • Process 1200 may be implemented by communication apparatus 1110 or any suitable UE or machine type devices. Solely for illustrative purposes and without limitation, process 1200 is described below in the context of communication apparatus 1110 as a UE and network apparatus 1120 as a network node (e.g., gNB) of a wireless network. Process 1200 may begin at block 1210.
  • a network node e.g., gNB
  • process 1200 may involve processor 1112 of communication apparatus 1110storing, in memory 1114, information with respect to a plurality of permutations with respect to a mapping between a plurality of SRS resources and a plurality of antenna ports at communication apparatus 1110. Process 1200 may proceed from 1210 to 1220.
  • process 1200 may involve processor 1112 receiving, via transceiver 1116, signaling from network apparatus 1120.
  • the signaling may contain an index identifying a permutation among the plurality of permutations.
  • Process 1200 may proceed from 1220 to 1230.
  • process 1200 may involve processor 1112performing, via transceiver 1116, an uplink transmission of data to network apparatus 1120 using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.
  • the index may include one or more binary bits.
  • a quantity of the one or more binary bits may correspond to a number of permutations of the plurality of permutations that are available. For instance, when the number of permutations of the plurality of permutations that are available is 2, the index may include 1 bit. Moreover, when the number of permutations of the plurality of permutations that are available is 4, the index may include 2 bits.
  • in receiving the signaling process 1200 may involve processor 1112 receiving an RRC signal or an MAC CE.
  • in receiving the signaling process 1200 may involve processor 1112 receiving UL DCI.
  • process 1200 may involve processor 1112 performing additional operations. For instance, process 1200 may involve processor 1112 constructing a codebook comprising a plurality of precoders. Moreover, process 1200 may involve processor 1112 processing the data using the codebook prior to performing the uplink transmission of the data. In some implementations, in constructing the codebook, process 1200 may involve processor 1112 selecting a candidate precoder from a single-stage codebook or a dual-stage codebook and performing a permutation on the candidate precoder.
  • in performing the permutation on the candidate precoder process 1200 may involve processor 1112 performing a plurality of permutations on the candidate precoder to construct the codebook.
  • the plurality of permutations may cover a plurality of mutually unbiased bases, a plurality of codebooks specified in 3GPP specifications, or a combination thereof.
  • process 1200 may involve processor 1112 performing a number of operations. For instance, process 1200 may involve processor 1112 selecting an original codebook from a plurality of codebooks specified in 3GPP specifications. Moreover, process 1200 may involve processor 1112 enlarging the original codebook by performing one or more permutations on the original codebook with one or more permutation matrices to obtain the codebook. In some implementations, a feedback overhead of the codebook may remain unchanged compared to a feedback overhead of the original codebook.
  • process 1200 in performing the permutation on the candidate precoder may involve processor 1112 selecting a permutation matrix from a plurality of permutation matrices. Additionally, process 1200 may involve processor 1112 applying the permutation matrix to the candidate precoder to enlarge the candidate precoder.
  • in selecting the permutation matrix process 1200 may involve processor 1112 dynamically or semi-statically receiving signaling from network apparatus 1120 indicating selection of the permutation matrix for constructing the codebook.
  • in receiving the signaling process 1200 may involve processor 1112 receiving RRC signaling or an MAC CE as part of CSR or independent of the CSR.
  • in selecting the permutation matrix process 1200 may involve processor 1112 selecting the permutation matrix based on an indication that is an integral part of the codebook.
  • each of the plurality of permutation matrices may correspond to respective one or more antenna placement scenarios or one or more codewords.
  • the candidate precoder may include a rank 2 precoder.
  • process 1200 may involve processor 1112 performing additional operations. For instance, process 1200 may involve processor 1112receiving, via transceiver 1116, further signaling from network apparatus 1120 indicating an order in which the plurality of SRS resources are mapped to the plurality of antenna ports at communication apparatus 1110 for a subsequent uplink transmission.
  • each of one or more of the antenna ports may be configurable to be mapped to any SRS resource of the plurality of SRS resources for the subsequent uplink transmission using the codebook.
  • the further signaling may indicate one of the plurality of permutations with respect to the order in which the plurality of SRS resources are mapped to the plurality of antenna ports.
  • the plurality of antenna ports may be fixedly mapped to the plurality of SRS resources for the subsequent uplink transmission using the codebook.
  • the further signaling may include a PMI, and the one of the plurality of permutations may be an integral part of in a PMI definition with respect to the PMI.
  • process 1200 may involve processor 1112 performing additional operations. For instance, process 1200 may involve processor 1112receiving, via transceiver 1116, further signaling from network apparatus 1120 indicating a CSR with respect to the codebook. Moreover, process 1200 may involve processor 1112selecting, based on the CSR, one or more codewords in the codebook. In some implementations, in transmitting the processed data to network apparatus 1120 process 1200 may involve processor 1112 transmitting the processed data to network apparatus 1120 using the one or more codewords.
  • in receiving the further signaling from network apparatus 1120 indicating the CSR process 1200 may involve processor 1112receiving the CSR with a bitmap through RRC signaling.
  • a length of the bitmap may equal a number of precoders in the codebook.
  • any two components so associated can also be viewed as being “operably connected” , or “operably coupled” , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being “operably couplable” , to each other to achieve the desired functionality.
  • operably couplable include but are not limited to physically mateable and/or physically interacting components and/or wirelessly interactable and/or wirelessly interacting components and/or logically interacting and/or logically interactable components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente invention concerne diverses solutions se rapportant à une transmission de liaison montante basée sur un livre-code dans des communications sans fil. Un équipement d'utilisateur (UE) stocke des informations relatives à une pluralité de permutations par rapport à un mappage entre une pluralité de ressources de signal de référence de sondage (SRS) et une pluralité de ports d'antenne au niveau de l'UE. L'UE transmet une signalisation à partir d'un nœud de réseau d'un réseau sans fil. La signalisation contient un indice identifiant une permutation de la pluralité de permutations. L'UE exécute une transmission de liaison montante de données vers le nœud de réseau au moyen d'une ou plusieurs ressources de SRS de la pluralité de ressources de SRS et d'un ou plusieurs ports d'antenne de la pluralité de ports d'antenne selon la permutation identifiée.
PCT/CN2018/109347 2017-10-03 2018-10-08 Transmission de liaison montante basée sur un livre-code dans des communications sans fil Ceased WO2019068266A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880004890.XA CN110100407B (zh) 2017-10-03 2018-10-08 无线通信中基于码本的上行链路传输方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762567424P 2017-10-03 2017-10-03
US62/567,424 2017-10-03

Publications (1)

Publication Number Publication Date
WO2019068266A1 true WO2019068266A1 (fr) 2019-04-11

Family

ID=65994946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/109347 Ceased WO2019068266A1 (fr) 2017-10-03 2018-10-08 Transmission de liaison montante basée sur un livre-code dans des communications sans fil

Country Status (3)

Country Link
CN (1) CN110100407B (fr)
TW (1) TWI704780B (fr)
WO (1) WO2019068266A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10707939B2 (en) * 2017-10-03 2020-07-07 Mediatek Inc. Codebook-based uplink transmission in wireless communications

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11101856B2 (en) * 2019-08-16 2021-08-24 Lg Electronics Inc. Method and apparatus for uplink signal transmission based on codebook in a wireless communication system
CN112399403B (zh) * 2019-08-16 2022-03-11 大唐移动通信设备有限公司 一种上行调度信息确定方法及装置
WO2021062664A1 (fr) * 2019-09-30 2021-04-08 华为技术有限公司 Procédé, dispositif et système de mise à jour de données de configuration
CN111758275B (zh) * 2020-05-22 2022-04-15 北京小米移动软件有限公司 定位用途参考信号的传输方法、装置、设备及存储介质
CN113972938B (zh) * 2020-07-24 2023-08-22 华为技术有限公司 一种通信方法及装置
WO2022236487A1 (fr) * 2021-05-08 2022-11-17 Oppo广东移动通信有限公司 Procédé, dispositif terminal et dispositif réseau de communication sans fil
CN115836576B (zh) * 2021-07-01 2025-11-04 苹果公司 改进上行链路性能的码本探测参考信号（srs）天线映射方法
WO2023050117A1 (fr) * 2021-09-29 2023-04-06 Qualcomm Incorporated Signal de référence de sondage basé sur un livre de codes et configurations d'indicateur de matrice de précodage
CN118891829A (zh) * 2022-04-21 2024-11-01 联发科技股份有限公司 用于上行链路信号预编码和报告的方法和装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757702A1 (fr) * 2005-08-24 2007-02-28 Medizinische Hochschule Hannover Vecteur gammaretroviral auto-inactivant ( SIN)
CN101651469A (zh) * 2008-08-15 2010-02-17 三星电子株式会社 用于lte系统中发送上行监测参考符号的跳频方法
US20160269157A1 (en) * 2015-03-14 2016-09-15 Qualcomm Incorporated Reciprocal channel sounding reference signal multiplexing
CN106160924A (zh) * 2015-04-07 2016-11-23 中国移动通信集团公司 一种信道状态信息反馈的方法、装置、终端及基站

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9755708B2 (en) * 2008-04-16 2017-09-05 Texas Instruments Incorporated High data rate uplink transmission
KR101707680B1 (ko) * 2008-12-21 2017-02-17 엘지전자 주식회사 무선 통신 시스템에서 정보 전송 장치 및 방법
WO2014168323A1 (fr) * 2013-04-10 2014-10-16 Lg Electronics Inc. Procédé et appareil d'alignement de couches pour formation de faisceaux tridimensionnelle multi-couches dans un système de communication sans fil
US9680535B2 (en) * 2015-01-16 2017-06-13 Samsung Electronics Co., Ltd. Method and apparatus for reduced feedback FD-MIMO
US9806781B2 (en) * 2015-04-29 2017-10-31 Samsung Electronics Co., Ltd. Codebook design and structure for advanced wireless communication systems
CN106411374B (zh) * 2015-07-31 2020-01-24 电信科学技术研究院 一种fd mimo系统信道状态信息反馈方法及相关设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757702A1 (fr) * 2005-08-24 2007-02-28 Medizinische Hochschule Hannover Vecteur gammaretroviral auto-inactivant ( SIN)
CN101651469A (zh) * 2008-08-15 2010-02-17 三星电子株式会社 用于lte系统中发送上行监测参考符号的跳频方法
US20160269157A1 (en) * 2015-03-14 2016-09-15 Qualcomm Incorporated Reciprocal channel sounding reference signal multiplexing
CN106160924A (zh) * 2015-04-07 2016-11-23 中国移动通信集团公司 一种信道状态信息反馈的方法、装置、终端及基站

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10707939B2 (en) * 2017-10-03 2020-07-07 Mediatek Inc. Codebook-based uplink transmission in wireless communications

Also Published As

Publication number Publication date
CN110100407A (zh) 2019-08-06
TWI704780B (zh) 2020-09-11
CN110100407B (zh) 2022-06-17
TW201924246A (zh) 2019-06-16

Similar Documents

Publication Publication Date Title
US10707939B2 (en) Codebook-based uplink transmission in wireless communications
CN110036570B (zh) 基于码本的上行链路传输方法及用户设备
WO2019068266A1 (fr) Transmission de liaison montante basée sur un livre-code dans des communications sans fil
CN110024302B (zh) 一种无线通信方法及相关无线通信装置
US11152979B2 (en) Method and apparatus for codebook design and signaling
US20190103903A1 (en) Codebook Designs To Support ULA And Non-ULA Scenarios
US10298307B2 (en) Method and apparatus for channel state information reference signal (CSI-RS)
US10594374B2 (en) Codebook-based uplink transmission in wireless communications
WO2019057094A1 (fr) Transmission de liaison montante basée sur un livre-code dans des communications sans fil
WO2019096071A1 (fr) Procédé et appareil de communication, et système
US20190068256A1 (en) Codebook Subset Restriction for Full-Dimension MIMO
WO2019196801A1 (fr) Procédé de transmission de données et appareil et système de communication
CN113037347A (zh) 用于带有极化有源天线阵列的mimo无线通信系统的csi反馈
US10523290B2 (en) Codebook-based uplink transmission in wireless communications
CN120917676A (zh) 多trp相干联合传输的csi报告
WO2019068264A1 (fr) Nouvelles conceptions de livre-code pour supporter des scénarios ula et non ula
US20200127875A1 (en) Reference Signal With Low Power Imbalance And Low Peak-To-Average Power Ratio In Mobile Communications
WO2025090008A1 (fr) Rapport basé sur la mesure pour équipement utilisateur (ue) comprenant des récepteurs à faible complexité

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18864760

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18864760

Country of ref document: EP

Kind code of ref document: A1