TW201921864A - Method for codebook-based uplink transmission - Google Patents

Method for codebook-based uplink transmission

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Publication number
TW201921864A
TW201921864A TW107133050A TW107133050A TW201921864A TW 201921864 A TW201921864 A TW 201921864A TW 107133050 A TW107133050 A TW 107133050A TW 107133050 A TW107133050 A TW 107133050A TW 201921864 A TW201921864 A TW 201921864A
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TW
Taiwan
Prior art keywords
codebook
method
plurality
signaling
permutation
Prior art date
Application number
TW107133050A
Other languages
Chinese (zh)
Inventor
楊維東
周子涵
蘇昭誠
蔡隆盛
Original Assignee
聯發科技股份有限公司
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Priority to US201762560231P priority Critical
Priority to US62/560,231 priority
Priority to US201762565182P priority
Priority to US62/565,182 priority
Priority to US62/570,685 priority
Priority to US201762570685P priority
Priority to US201762588200P priority
Priority to US62/588,200 priority
Application filed by 聯發科技股份有限公司 filed Critical 聯發科技股份有限公司
Publication of TW201921864A publication Critical patent/TW201921864A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478Special codebook structures directed to feedback optimization
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0482Adaptive codebooks

Abstract

Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) generates a codebook comprising a plurality of precoders. The UE processes information using the codebook and transmits the processed information to a network node of a wireless network. In generating the codebook, the UE selects a candidate precoder from a single-stage codebook or a dual-stage codebook and performs a permutation on the candidate precoder. The methods for codebook-based uplink transmission can reduce transmission overhead, improve system performance, and reduce power consumption by UEs.

Description

Codebook-based uplink transmission in wireless communication

The present invention relates to wireless communication technologies. More specifically, the present invention relates to codebook based uplink (UL) transmission in wireless communications.

The method described in this section is not prior art to the scope of the invention as set forth below, and is not admitted to be prior art in this section unless otherwise stated herein.

Compared to the downlink (DL) codebook design, there are significant differences in network node implementation and deployment scenarios. Due to different gain setting points, the problem of relative phase discontinuity (RPD) has been identified in Long-Term Evolution (LTE) mobile communication systems. Since the form factor is limited and the given immediate radiation/propagation environment is susceptible to effects such as handheld devices, complex local scattering, etc., there may be possible antenna gain differences on the user equipment (UE) side. When a plurality of tablets are used at the UE, there may also be frequency coherence problems such as non-common mode phase noise. The situation is more complicated in the fifth generation (5 th -Generation, 5G) or a new radio (New Radio, NR) mobile communication system, supports both discrete Fourier transform OFDM (discrete Fourier transform OFDM, DFT -OFDM) And cyclic-prefix orthogonal frequency-division multiplexing (CP-OFDM) waveforms, and they have a peak-to-average power ratio (PAPR) for the precoder. There are different needs for maintaining aspects.

The following summary is merely illustrative and is not intended to be limiting in any way. That is, the following summary is provided to introduce the concepts, concepts, advantages and advantages of the novel and non-obvious techniques described herein. Selected embodiments will be further described in the detailed description below. Therefore, the following summary is not intended to identify essential features of the claimed subject matter.

With regard to codebook based uplink transmission in wireless communications, the present invention proposes various solutions, schemes, methods and apparatus. According to the various solutions proposed herein, the codebook can be designed to be stable to different scenes. The codebook may cover a plurality of object codebooks optimized for a particular antenna configuration and/or scene (eg, version 8 (Rel-8) DL quad transmitter (4Tx) rank 2 codebook, version 10 (Rel- 10) UL 4Tx rank 1 code book rank 2 mutual unbiased base (MUB) extension and version 15 (Rel-15) DL NR 4Tx rank 2 code book). It is believed that the proposed solutions, schemes, methods and apparatus can reduce transmission overhead, improve system performance, and reduce UE power consumption.

In one aspect of the invention, a method involves a processor of a UE constructing a codebook comprising a plurality of precoders. The method also involves the processor processing the information using the codebook. The method further involves the processor transmitting the processed information to a network node of the wireless network. In constructing the codebook, the method involves the processor selecting a candidate precoder from a single order codebook or a two order codebook and performing permutation on the candidate precoder.

In one aspect of the invention, an apparatus includes a transceiver and a processor coupled to the transceiver. The transceiver is capable of wirelessly communicating with network nodes of the wireless network. The processor is capable of: (a) constructing a codebook comprising a plurality of precoders; (b) processing the information using the codebook; and (c) transmitting the processed information to a network node of the wireless network via the transceiver . When constructing the codebook, the processor can select a candidate precoder from a single order codebook or a two order codebook and perform permutation on the candidate precoder.

It is worth noting that although the description provided here is based on certain wireless access technologies, networks and network topologies, such as Long Term Evolution (LTE), LTE-Advanced (LTE-Advanced) and Enhanced LTE-Advanced (LTE-Advanced). Pro), 5th Generation (5G), NR, Internet-of-Things (IoT) and Narrow Band Internet of Things (NB-IoT), but the concepts and solutions proposed by the present invention Any and its variants/derivatives can be implemented, implemented, and implemented in other types of wireless access technologies, networks, and network topologies. Accordingly, the scope of the invention is not limited to the examples described herein.

The embodiments and implementations of the claimed subject matter are described in detail below. It should be understood, however, that the disclosed embodiments and embodiments are merely illustrative of the claimed subject matter that can be implemented in various forms. The present invention may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments and embodiments set forth herein. Rather, these exemplary embodiments and implementations are provided so that the description of the present invention is intended to be In the following description, the features and technical details are omitted to avoid unnecessarily obscuring the embodiments and embodiments presented.
Overview

Embodiments of the present invention are directed to various techniques, methods, schemes, and/or solutions related to codebook based UL transmission in wireless communications. According to the invention, many possible solutions can be implemented individually or in combination. That is, although these possible solutions are separately described below, two or more of these possible solutions may be implemented in one combination or another.
NR uplink codebook design

Since the codebook for NR needs to support multiple wireless environments and various UE actual problems, the present invention proposes a plurality of methods and/or schemes as described below to design a rank 2 or higher rank code book, so that the codebook includes LTE Rel-10. UL four transmitter (4Tx) codebook and NR Rel-15 DL 4Tx codebook.

In the present invention, the phrase "chord distance equivalent" can be used to refer to two code words having a chord pitch of zero. Further, when there is a chord-distance equivalent codeword of any codeword of the second codebook (codebook 2) in the first codebook (codebook 1), the codebook 1 can be considered to "cover" the codebook 2. In addition, for any codebook of two codebooks, when there is a chordwise equivalent codeword in another codebook, "code pitch equivalent" can be used to refer to two codebooks. In other words, they cover each other.

In addition to the above design and construction, additional designs and structures are described below in accordance with the present invention. It can be verified that the design codebook proposed by the present invention can completely cover the Rel-8 DL 4Tx rank 2 codebook, the rank 2 MUB extension of the Rel-10 UL 4Tx rank 1 codebook, and the Rel-15 DL NR 4Tx rank 2 codebook.

According to the solution proposed by the present invention, the following four vectors can be defined:
, , , .

According to the proposed scheme, for the first method (or "first structure"), the following multiples can be defined matrix:
Eight matrix , From , , ,among them , .
2. Eight matrices , From , ,among them .

Here, the rank 2 precoder can be given by:
, .

According to the proposed scheme, for the second method (or "second structure"), another codebook equivalent to the above-mentioned codebook pitch can be defined as follows:
1. Eight matrices come from , , ,among them , .
2. Eight matrices come from , ,among them .

Here, the rank 2 precoder can be given by:
, .

Generally speaking, in the second structure, the diagonal matrix (for each , You can multiply the 8 matrices in (2) and the 8 matrices in (1) from the left side to obtain another chord equivalent codebook in the first structure.

According to the proposed scheme, for the third method (or "third structure"), the following code book can be defined:
Four matrices From , , ,among them .

Here, the rank 2 precoder can be given by:
, Or from , Any of the eight matrixes, of which .

Or, can be used in the structure , Because they generate codewords and , The generated codeword chord is equivalent. It is worth noting that in all architectures, some codewords can be fetched (eg, it is not necessary to cover all of the codewords in the existing codebook). In addition, additional code words can be included. In the NR DL 4Tx codebook design, even if they generate a codebook equivalent to the pitch, With Included together. A similar approach can be taken here. More matrices can be included.

According to the proposed scheme, for the fourth method (or "fourth structure"), the codebook structure can be implemented as an antenna 埠 re-indexing. Therefore, a permutation matrix can be introduced in the codebook structure. From the first code book, such as TS 38.214 (v.0.1.2 September 2017) double-order code book among them Is a generic index (for example, ), Is a generic index (for example, ), the expanded code book can be Given, among them and Indicates the permutation matrix. An example is provided below.

Through NR DL 4Tx codebook, the following permutation matrix can be applied to the rank 2 precoder :
,
,
,
.

In this case, the beam group can be And the permutation matrix index is determined. For the UE, the permutation matrix index can be determined for a long time (for example, by radio resource control (RRC) signaling and/or media access control (MAC) control element (CE) as a codebook) The part of the codebook subset restriction (CSR) is independent of the CSR), so the feedback overhead of the extended codebook can remain unchanged compared to the initial codebook (eg, NR DL 4Tx codebook). Through the above example, the proposed design can cover the Rel-8 rank 2 4Tx codebook and the Rel-15 NR rank 2 4Tx codebook.

It is worth noting that for other ranks, the same or different permutation matrices can be identified to enlarge the codebook. In summary, applying a permutation matrix to an existing or first codebook to obtain an expanded or second codebook can be considered a general method of handling irregular antenna configurations. For the first structure, the second structure, and the third structure described above, using the rotation of the first structure, the second structure, and the third structure, a plurality of permutation matrices may be used. with To expand such as Code book.
Uniform code book design supporting multiple scenes

In the 5G/NR mobile communication, various scenarios can be encountered in the application of the UL codebook, including RPD, non-common mode phase noise, and antenna gain imbalance (AGI). In addition to uniform linear array (ULA) and non-ULA antenna configurations, the NR UL codebook is also expected to support these scenarios. Specifically, the codebook has all of the codewords in the LTE Rel-10 UL 4Tx codebook and the NR Rel-15 DL 4Tx codebook.

According to the solution proposed by the present invention, in order to support both the ULA and non-ULA antenna configurations, a double-order codebook structure having a first structure ("Structure 1") or a second structure ("Structure 2") may be employed, as described below. .

For structure 1, order , , , , can define the following:

In this design:
make

as well as

Rank 1 precoder can be Given, among them, , ,and . It is worth noting that , Can take values from 1, j , -1, -j , Yes Vector, which is 1 at element i and zero at other places. Also note that in At the time, there are 16 rank 1 precoders of the Rel-10 4Tx UL codebook (the first 16 precoders in the Rel-10 4Tx UL codebook for the 埠 combination) and 32 ranks of the Rel-15 NR DL 4Tx codebook. 1 precoder. By grouping these vectors together, 40 unique precoders (a total of 8 precoders in two codebooks) can be obtained.

It should also be noted that the allowable range of each parameter is limited by the CSR. To support the same 4Tx埠 combined with the rank 1 precoder in the Rel-10 UL 4Tx codebook, CSR can be considered. For example, beam group limits can be used (E.g, ), this can make One bit of savings is saved on the signaling. In addition, the allowed common phase values depend on the beam selection pair with . when For beam selection or Can allow from Take the common phase value; for beam selection ( i , j )=(1,2) , (2,1), allow from Take the common phase value. when For beam selection or Can allow from Take the common phase value; for beam selection ( i , j )=(1,1) , (2,2), allow from Take the common phase value. So you can One bit of savings is saved on the signaling.

To support the same rank 1 precoder of the Rel-15 DL 4Tx codebook, the following CBSRs can be used: beam selection Limited to (1,1), (2,2). (for example, not allowed with ).

For structure 2, order , , , , can define the following:

In this design:
make

as well as

among them, Yes Vector, which is 1 at element i and zero at other places.

The rank 1 precoder can be given by:
, .

here, , You can take values from 1, j , -1, -j . Therefore, beam selection has eight options, and quadrature phase-shift keying (QPSK) can be used for common phase.

Similar to the Structure 1, the CBSR can also be used to reduce signaling overhead and recover the NR DL 4Tx codebook and the Rel-10 UL 4Tx codebook. In order to recover the Rel-10 UL 4Tx codebook, the first beam set (and no other beam sets) is required (for example, ). For beam selection , , with , the common phase value is limited to . For beam selection , , with , the common phase value is limited to . In order to recover the NR DL 4Tx codebook, beam selection Limited to , , with .
Condition code book use

By using a conditional codebook, the precoding actually used by the UE can be modified on the codeword given in the specification (eg, in TS 38.214) based on signaling from the base station (eg, via dynamic or semi-static signaling). Device. According to the solution proposed by the present invention, when a base station (for example, gNB) detects that one or a plurality of antennas from the UE have low gain, the base station can semi-statically transmit signals to the UE through RRC signaling or MAC CE. The UE is not selected for certain antennas. For example, the base station can send a signal to the UE by using a bitmap, where each "0" in the bitmap indicates that the corresponding antenna of the UE is off (for example, the bitmap [1 0 1 0] indicates that the UE turns off the UE four. The second and fourth antennas in the antenna). Therefore, all the codebook designs in the above structure 1 can be reused. On the UE side, once the UE receives a precoding matrix indicator (PMI) from the base station, then, depending on the indication from the base station, some of the components of the indicated precoder may be turned off. Advantageously, dynamic signaling design and codebook design can be simplified. It is worth noting that It may also be included in semi-static signaling/MAC CE.

According to the solution proposed by the present invention, from the perspective of the coherent group composition indicated by the UE, the base station can take measures such as SRS-based RPD calibration to see if the necessary remedial steps are sufficient to eliminate the coherent transmission capability of the antenna at the UE. Constrained group constraints. Since the base station performs SRS calibration based on the SRS, this can be extended to the demodulation reference signal (DMRS) from the UE. For example, the base station may send the same transmit PMI (TPMI) to the UE and use different physical uplink shared channel (PUSCH) transmit power levels to calibrate the RPD behavior of the UE. Considering the SRS/DMRS based on the calibration result, the base station can instruct the UE to use a precoder with phase rotation associated with the precoder extracted from the SRS/DMRS transmission of the UE. If the base station's remedial steps are still insufficient, or if the base station is physically unable to remedy this situation (eg, non-common mode phase noise at the UE), the base station will send a codebook constraint signal to the UE. In this case, the meaning of the codebook (constructed by Structure 1 or Structure 2) can be modified.

When there are two coherent groups, In structure 1, if Then: (1) the precoder can be used for coherent group 1, (2) only elements 1 and 2 can be used for coherent group 1, and (3) for coherent group 2, the transmit power can be turned off. Otherwise, if = 2, then: (1) the precoder can be used for coherent group 2, (2) only elements 3 and 4 can be used for coherent group 2, and (3) for coherent group 1, the transmit power can be turned off. In the case where the antennas of the coherent group are from non-adjacent indices (for example, 埠 1 and 3 in the coherent group, 埠 2 and 4 in the coherent group 2), a similar procedure is also possible.

Depending on the proposed scheme, re-indexing can be considered to allow arbitrary antenna coherent group definitions. For example, the precoder can be given by the following index:
, .

Then, precoders with indices of 0, 8, 16, 24, 32, 40, 48, and 56 can be used for the combination (1, 2) and the indices are 1, 9, 17, 25, 33, 41, 49, and 57. The precoder can be used for 埠 combination (, 3), etc. The first two components can be used for the associated antenna. For example, when the index is 9, the precoder It is specific because it is associated with 埠(1,3), then 1 is applied to 埠1, -1 is applied to 埠3, and 埠2 and 4 are closed.

It is worth noting that if the base station can configure a bitmap for the addressable precoder of dynamic signaling, it is not necessary to enforce the constraints in the NR specification. For example, even beam groups There are more than 64 precoders in the base station, and the base station can also configure bitmaps, so that the total addressable precoder is limited to no more than 64. Then there may be 6 bits.
Rank 2 precoder construction

According to the proposed scheme of the present invention, the rank 2 codebook structure can start from NR as follows:

here, , , . In addition, Representing a common phase coefficient, wherein , with , .

Similar to the above-described method of antenna off and phase coherence groups, for the DFT-OFDM waveform, the rank 2 codeword thus obtained can be modified as necessary to remit the PAPR hold codeword. For example, the base station can provide the UE with a TPMI mapped to a rank 2 codeword as shown below (unit amplitude and phase angle of each component):

For DFT-OFDM waveforms, the UE can understand the following:

here, Indicates that there is no transmission at the specified layer of a given antenna. In the given example, the UE is not in the first layer (layer 1) users 埠 3 and 4, and the UE is not using 埠 1 and 2 in the second layer (layer 2). The base station can provide a modification mask for all codewords ([ 1 X; 1 X; X 1 X 1] is used in this example), or a different modification mask can be used for the codewords. It can be verified that most of the PAPR hold rank 2 code words of the Rel-10 4Tx UL can be generated by applying a mask to the rank 2 NR Rel 4Tx DL codeword. Thus, codewords for different purposes can be embedded in a single codebook and the meaning employed at the UE can be modified in accordance with signaling from the base station (eg, via RRC signaling and/or MAC CE). The applied precoder can be the result of dynamic signaling and semi-static signaling, including possible CSR. The process as shown in Figure 1 is used in the configuration of the coherent group and the use of the corresponding codebook. 1 depicts an example message chain for a UL-based codebook transmission process 100 in accordance with the present invention involving UE 110 and network node 120.
Codebook based transmission

In accordance with the teachings of the present invention, the process as shown in Figure 1 can be used in terms of coherent group configuration and use of corresponding codebooks. 1 depicts an example message chain for a UL-based codebook transmission process 100 in accordance with the present invention involving UE 110 and network node 120.

Referring to FIG. 1, in step (1) of the process 100, the UE 110 transmits a report to the network node 120 regarding the Tx chain coherent group report, the analog beam packet, and the isochronous transport packet. In step (2) of the process 100, the network node 120 sends signaling to the UE 110 to configure the SRS resource and the SRS resource indicator (SRI) at the UE 110, and the transmitted rank indicator (TRI). And/or PMI mapping tables (including possible codebook subset restrictions). Specifically, in step (2a), network node 120 can configure SRS transmission parameters for RPD detection and calibration. Further, in step (2b), UE 110 may perform SRS transmission to network node 120 for RPD calibration. Additionally, in step (2c), network node 120 may send signaling to UE 110 to reconfigure the SRI/TRI and/or TPMI mapping table (including possible codebook subset restrictions). In step (3) of process 100, UE 110 may perform transmission of SRS resources for UL channel state information (CSI) acquisition. In step (4) of process 100, network node 120 may send signaling to UE 110 for PUSCH scheduling using SRI/TRI/TPMI signaling in UL downlink control information (DCI). . In step (5) of process 100, UE 110 may consult the codebook in accordance with SRI/TRI/TPMI signaling from network node 120, and UE 110 may apply the precoder to the codebook in accordance with the notified PMI.

In accordance with the proposed scheme of the present invention, there are a plurality of options for the use of coherent group configurations and codebooks. In the first option (option 1), the concept of a coherent group can be used for codebook definition, but the SRI/TRI/TPMI signaling design may support dynamic indication selection of codewords from any codebook. Figure 2 depicts an example concept 200 of option 1 in accordance with the present invention. In concept 200, a codebook can be constructed recursively by selecting a codebook and selecting a combination codebook.

In the second option (option 2), the network node (e.g., gNB) can signal the UE to the coherent group configuration via RRC signaling or MAC CE. In addition, one or more codewords can be selected from a specially defined codebook for the coherent group configuration using dynamic signaling with UL DCI. Figure 3 depicts an example concept 300 of option 2 in accordance with the present invention.

In the third option (option 3), the network node (eg, gNB) can signal the UE to the coherent group configuration via RRC or MAC CE. Since the number of codewords in a four coherent codebook (埠Select Codebook) is limited, and the codebook can provide useful support for antenna gain imbalance (AGI), there are four The codebook of the coherent group can support the situation of two coherent group configurations and one coherent group respectively. Figure 4 depicts an example concept 400 of option 3 in accordance with the present invention. In concept 400, the 埠 selection codebook can be used in conjunction with a 埠 combination codebook or a codebook constructed by two coherent groups. It is worth noting that for option 3 of a UE configured with a coherent group (for example, from a network perspective, the UE can perform phase coherent transmission of all four Tx chains), the network node can dynamically notify by signal The code word from the choice code book or the combination code book.

Therefore, the precoder selection at the base station/network node (e.g., gNB) is not limited by the coherent group signaling from the UE (e.g., option 1 and option 3). The concept of a coherent group can be used for the definition of a codebook, but the SRI/TRI/TPMI signaling design may support dynamic indication selection of codewords from any codebook. This is important and beneficial for solving the problem of UL transmission power.
Combined uplink codebook design

In summary, it is desirable to support both ULA and non-ULA antenna configurations. Specifically, the desired 5G/NR UL codebook covers all codewords in the Rel-10 UL 4Tx codebook and the NR version of the Rel-15 DL 4Tx codebook.

Figure 5 depicts a rank 1 codebook design 500 in accordance with the present invention. Referring to Figure 5, the proposed rank 1 codebook design 500 may cover the Rel-8 4-Tx DL codebook, the Rel-10 UL 4Tx codebook, and the Rel-15 4-Tx DL codebook.

According to the solution proposed by the present invention, it can be used , , with To define the proposed NR rank 1 precoder. Therefore, the definition is as follows:


make
as well as
as well as

The rank 1 precoder can be given by:

among them, , and .

It is worth noting that the allowed beam selection or as well as You can take values from 1, j , -1, -j . here, Yes Vector, which is 1 at element i and zero at other places. It should also be noted that there is 4Tx 埠 Combine 16 rank 1 precoders from the Rel-10 4Tx UL codebook (the first 16 precoders in the Rel-10 4Tx UL codebook for the 埠 combination) and 32 of the Rel-15 NR DL 4Tx codebooks Rank 1 precoder. By grouping these vectors together, you can get 40 unique precoders (8 precoders in both codebooks).

It is worth noting that the allowable range of each parameter may be limited by CSR.

To support the same 4Tx埠 combined with the rank 1 precoder in the Rel-10 UL 4Tx codebook, CSR can be used. For example, beam group limits can be used (E.g, ), this can make One bit of savings is saved on the signaling. In addition, the allowed common phase values depend on the beam selection pair. when For beam selection or Can allow from Take the common phase value; for beam selection ( i , j )=(1,2) , (2,1), allow from Take the common phase value. when For beam selection or Can allow from Take the common phase value; for beam selection ( i , j )=(1,1) , (2,2), allow from Take the common phase value. Thus, in One bit of savings is saved on the signaling.

To support the same rank 1 precoder of the Rel-15 DL 4Tx codebook, CSR can be used. Specifically, beam selection Limited to (1,1), (2,2). For example, not allowed with .

At the base station/network node, since the antenna form factor problem is less than the problem at the UE, it is generally assumed that ULA is used for the polarized antenna/antenna element, and a two-dimensional (2D) cross-polarized antenna is usually assumed. The array is used for frequency division multiple-input-and-multiple-output (FD-MIMO).

Figure 6 depicts example scenarios 600A and 600B in accordance with the present invention. Referring to Figure 6, scenario 600A depicts an example ULA response in which a signal from a signal source collides with a uniform linear array. This signal model is typically used for reception in array signal processing. This signal model can also be used to send. The phase difference between the receivers, Projection of the antenna position in the direction of wave propagation determine. Array response vector can be phased , , with determine:

In the case of ULA, due to Is a uniform difference (for example, , It is the antenna spacing) and its phase difference is also uniform. The DFT can be used to match the phase difference. Therefore, high gain coherent transmission and reception can be obtained.

However, on the UE side, an irregular antenna layout as shown in scenario 600B may occur. Generally speaking, adjacent projection The difference between them is uneven, and it is difficult to approximate them directly with arbitrary DFT beams. . However, it can be rearranged , , with Better approximate phase distribution. For example, for a particular antenna layout, the DFT beam can be well approximated On the contrary, it is not well approximated by any DFT beam. . In other words, the antenna front is useful.

Starting with the first code book (for example, a double-order code book):

among them, Is a generic index (for example, ), Is a generic index (for example, ), as in TS 38.214 (V.0.1.2 September 2017) , you can build an expanded code book through the following formula

among them, with Is the permutation matrix.

It is worth noting that the number of codewords in the expanded codebook is the first codebook. Times. In the present invention, the process of generating the second codebook from the first codebook is referred to as "埠 replacement".

In the case where the target irregular antenna layout is known, it is possible to identify the required 埠 replacement. Since there are many different antenna layouts at the UE, a standard can be used to identify the shuffling parameters (rather than identifying the permutation of a particular antenna layout). According to the proposed scheme of the present invention, the larger codebook generated by the 埠 replacement covers as many of the Rel-8 DL codebook design and the Rel-15 NR DL codebook design and the Rebel-10 UL codebook MUB extension. The entry. Since the number of 埠 permutations directly leads to signaling overhead in UL DCI, it is also desirable to use 埠 permutation as much as possible to cover the code of the reference codebook (eg, Rel-8, Rel-10, Rel-15 codebook) word.

Through 埠 replacement, the design space consists of two parts: (1) the choice of the first code book, and (2) the choice of 埠 replacement. Therefore, the two structures shown in the table below are provided (for example, "Structure A" and "Structure B").

Figure 7 depicts a rank 2 codebook design 700 in accordance with the present invention. Referring to Fig. 7, either structure A or structure B can cover the Rel-8 4Tx DL codebook, the Rel-10 4Tx UL codebook extension, and the Rel-15 4Tx DL codebook.

About structure A, from The NR Rel-15 4Tx DL starts, in addition to the initial codebook (1234), you can also use the 埠 replacement (1243), (1324), (1423) to obtain an extended codebook of 128 code words. The codebooks built cover all codewords for the Rel-15 4Tx DL codebook, the Rel-8 4Tx codebook, and the Rel-10 UL 4Tx codebook. Regarding structure B, the first codebook can be based on beam vector combination design, and the expanded matrix can be based on the use of the permutation matrix. A total of 64 code words can be stored in the expanded code book. It can be verified that the designed codebook can completely cover the Rel-8 DL 4Tx rank 2 codebook, the Rank 2 MUB extension of the Rel-10 4Tx UL rank 1 codebook, and the Rel-15 DL NR 4Tx rank 2 codebook.

For rank 2 in structure A, through For the NR DL 4Tx codebook, the following permutation matrix can be applied:
Expressed as a replacement (1234),
Expressed as a replacement (1243),
Expressed as a replacement (1324),
Expressed as a replacement (1423).
make


In addition, you can use Generate 128 rank 2 codewords, p = 1, 2, 3, 4, .

For rank 2 in structure B. make , as well as . You can generate 64 code words using the following formula:

here, It It can be given by:

The definition is the same as in the NR DL 4Tx codebook.
make

.

Can provide the following Two options, the first option (Alt 1) and the second option (Alt 2):
Alt 1
Alt 2
or

It is worth noting that Don’t have to include both with Because they generate a chord equivalent codeword, one of them is sufficient. In addition, Don’t have to include both with Because they generate a chord equivalent codeword.

A bandwidth or sub-band precoder that indicates the UL transmission may be aggregated using SRS resources and PMI. For example, SRS resources 1, 2, 3, and 4 can be aggregated for use with 4Tx codebooks. A single implicit mapping from these SRS resources to the codebook antenna can be assumed. In summary, it is assumed that the single sequence of SRS resources is not sufficient to provide good support for multiple antenna layout scenarios.

According to the solution proposed by the present invention, there are various methods for providing specification support for codebook replacement by 埠, as described below.

According to the first method, when each SRS resource has a single SRS resource for the UL codebook, and the UE is instructed to map the SRS resource to the codebook, the first codebook (and no other version) is used for PMI. The definition is enough. For example, a network node (e.g., gNB) may indicate that SRS resources 1, 2, 3, and 4 are used for signal notification PMI. In one case, the network node sends a signal to notify SRS resources 1, 2, 3, and 4 to map to 埠 1, 2, 3, and 4 (signaling through the SRI list or index of the list: (1, 2, 3, 4)). In another case, the network node sends a signal to notify SRS resources 1, 3, 2, and 4 to map to 1, 2, 3, and 4 (signaling through the SRI list or index of the list: (1, 3, 2) , 4)). Two illustrative examples are shown in Figures 8 and 9. Figure 8 depicts an example scenario 800 for a 埠 permutation (1234) indication from SRI signaling. Figure 9 depicts an example scenario 900 for a 埠 permutation (1324) indication from SRI signaling.

According to the second method, when each SRS resource has a single SRS resource for the UL codebook, and the order of the SRS resource mapping to the codebook is fixed, the indication of the SRS resource replacement is necessary for the PMI definition. For example, a network node (e.g., gNB) may indicate that SRS resources 1, 2, 3, and 4 are used for signal notification PMI. In one design option, the network node signals (UE) the replacement of the SRS resources (eg, (1, 2, 3, 4) or (1, 3, 2, 4)), and the PMI can be used for the first code. book. In another design option, as shown in Figure 10, the permutation can be integrated into the PMI definition and the PMI can be used in the second codebook. Figure 10 depicts an example scenario 1000 in which an 埠 replacement is an integrated part of a codebook definition.

According to the third method, when a single SRS resource having multiple frames is used for the UL codebook, an indication of SRS埠 replacement is necessary for the PMI definition. For example, a network node (e.g., gNB) may indicate a PMI having SRS resources of 埠 1, 2, 3, and 4 for signal notification. In a design option, the network node sends a signal notification (UE) SRS 置换 permutation (eg, (1, 2, 3, 4) or (1, 3, 2, 4)), and the PMI can be used for the first code. book. In another design option, the replacement of the SRS can be integrated into the PMI definition and the PMI can be used in the second codebook.

In summary, since the number of codewords of the above structure B is limited (up to 64), the structure B may be a more reasonable choice between the structure A and the structure B of the NR 4Tx rank 2 codebook.
Codebook subset restriction

In accordance with the proposed scheme of the present invention, for UL-based codebook transmissions having one SRS resource and a given number of SRSs, overhead reduction of TPMI and TPMI related signaling can be achieved. A variety of situations are as follows:

In the first case ("Case 1"), the Tx chains are irrelevant, and two of the four 埠 can be selected for rank 2 transmission.

In the second case ("Case 2"), the rank 2 transmission comes from the same coherent group. In this case, a two-transmitter (2Tx) codebook of rank 2 can be applied. Since there are two ways to select a coherent group, there are two ways to select a rank 2 2Tx precoder (assuming the same structure as the 2Tx UL codebook).

In the third case ("Case 3"), even if it is completely relevant, it may cause AGI problems. Therefore, the 埠 selection can cover all four 埠, rather than being limited to 埠 within the same coherent group as in Case 2. It is worth noting that when calculating the number of coding states, by repeating the precoder already included in case 3, repeated counting can be avoided. That is, (6 (the total number of combinations in case 3) - 2 (the total number of combinations in case 2)) x2 (the number of rank 2 codebook precoders) = 8.

In the fourth case ("Case 4"), one spatial layer transmission may come from coherent group 1, and the other spatial layer may come from coherent group 2. Therefore, a precoder of more than 2Tx can be used on each coherent group. According to the design of the 2Tx codebook, there may be six rank 1 precoders, so there are 6x6 ways to pair the precoders on two coherent groups. Here, the four precoders already covered in case 1 are excluded.

In the fifth case ("Case 5"), for complete correlation, in the calculation below, if the Rel-8 4Tx codebook is used, there are 16 entries.

Overall, the 4Tx rank 2 transmission has 66 encoding states. When no CSR is applied, or even if it is applied but not reflected in DL signaling, TPMI signaling requires ceil(log2(66)) = 6 bits. The following table summarizes the above five scenarios. In the table, "CAG" indicates a coherent antenna group, "4CAG" indicates irrelevance, "1 CAG" indicates complete coherence, and "2CAG" indicates partial coherence, where 埠1 and 2 form a coherent group, 埠3 and 4 Form another coherent group.

Therefore, CSR can provide savings based on coherent groups. For example, for a coherent group without AGI problems (for example, Case 5), ceil(log2(16)) = 4 bits is required. Advantageously, a 3-bit savings can be achieved compared to a fixed TPMI size of 7 bits. For a coherent group with an AGI problem (for example, Case 5 plus Case 3), then ceil(log2(16+8)) = 5 bits is required. Advantageously, a 2-bit savings can be achieved compared to a fixed TPMI size of 7 bits.

For Case 5, in the case of using the above proposed two-stage codebook of the present invention without using the Rel-8 4Tx codebook, the base station can select a useful codeword accordingly. As mentioned above, the proposed bi-level codebook includes all codewords for ULA and non-ULA antenna configurations. The base station can use a set (eg, ULA codewords) to reduce signaling overhead. In this case, CSR can be a useful tool for coordinating design goals with certain conflicts, namely: (1) having as many codewords as possible to cover multiple scenarios, and (2) having as few codewords as possible Minimize the signaling overhead associated with PMI. Given the benefits offered by CSR, it is advantageous for the base station to have flexibility in deciding which codewords are available for UL MIMO. Therefore, according to the proposed scheme, the base station can transmit the codebook subset restriction with the UL codebook bitmap to the UE through RRC signaling. The length of the bitmap is equal to the number of precoders in the codebook.
Illustrative embodiment

FIG. 11 depicts an example wireless communication environment 1100 in accordance with an embodiment of the present invention. The wireless communication environment 1100 relates to a communication device 1110 and a network device 1120 that wirelessly communicate with each other. Either communication device 1110 and network device 1120 can perform different functions for implementing the processes, schemes, techniques, processes, and methods described herein with respect to codebook-based uplink transmissions in wireless communications, including the various processes described above. , scenarios, scenarios, solutions, and techniques, and the process 1200 described below. Thus, communication device 1110 is an example embodiment of UE 110 in process 100, and network device 1120 is an example embodiment of network node 120 in process 100.

The communication device 1110 is part of an electronic device, which may be a UE such as a portable or mobile device, a wearable device, a wireless communication device, or a computing device. For example, the communication device 1110 can be implemented as a smart phone, smart watch, personal digital assistant, digital camera, or computing device such as a tablet, laptop, or laptop. In addition, the communication device 1110 can also be part of a machine type device, which can be an IoT or NB-IoT device, such as a stationary device, a home device, a wired communication device, or a computing device. For example, the communication device 1110 can be implemented as a smart thermostat, a smart refrigerator, a smart door lock, a wireless speaker, or a home control center. Alternatively, the communication device 1110 can be implemented in the form of one or a plurality of integrated-circuit (IC) chips, such as but not limited to, one or a plurality of single-core processors, one or a plurality of multi-core processors, one or A plurality of one or a plurality of reduced-instruction-set-computing (RISC) processors or a complex-instruction-set-computing (CISC) processor.

The communication device 1110 includes at least one of the elements shown in FIG. 11, for example, the processor 1112. The communication device 1110 may also include one or more other components (e.g., internal power supplies, display devices, and/or user interface devices) that are unrelated to the teachings of the present invention. For the sake of brevity, the other elements described above for communication device 1110 are neither shown in FIG. 11 nor described below.

Network device 1120 is part of an electronic device, which may be a network node such as a TRP, a base station, a small cell, a router, or a gateway. For example, network device 1120 can 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. Moreover, network device 1120 can be implemented in the form of one or more IC chips, such as but not limited to, one or a plurality of single core processors, one or more multi-core processors, one or more RISC processors, or one or Multiple CISC processors.

The network device 1120 includes at least one of the elements shown in FIG. 11, for example, the processor 1122. Network device 1120 may also include one or more other components (e.g., internal power supplies, display devices, and/or user interface devices) that are unrelated to the teachings of the present invention. For the sake of brevity, the above-described elements of network device 1120 are neither shown in FIG. 11 nor described below.

In one aspect of the invention, any of the processor 1112 and the processor 1122 can be one or a plurality of single core processors, one or a plurality of multi-core processors, one or a plurality of RISC processors, or one or more CISCs. The form of the processor is implemented. That is, even though the singular terms "processor" are used herein to refer to processor 1112 and processor 1122, in the present invention, any of processor 1112 and processor 1122 may include a plurality of embodiments in some embodiments. The processor, in other embodiments, includes a single processor. In another aspect, any of the processor 1112 and the processor 1122 can be implemented in the form of a hardware (and optionally a firmware) having electronic components, including, but not limited to, One or more transistors, one or a plurality of diodes, one or a plurality of capacitors, one or a plurality of resistors, one or a plurality of inductors, one or a plurality of memristors and/or configured for a specific purpose Or one or more varactors. In other words, at least in some embodiments of the invention, processor 1112 and processor 1122 are specific target machines that are specifically designed, arranged, and configured to perform codebook-based uplinks in accordance with embodiments of the present invention. The specific task of the transfer.

In some embodiments, communication device 1110 also includes a transceiver 1116 coupled to processor 1112 and capable of wirelessly transmitting and receiving data, signals, and information. In some embodiments, the transceiver 1116 is configured with a plurality of antennas (not shown), for example, four antenna ports. In some embodiments, the communication device 1110 further includes a memory 1114 coupled to the processor 1112 and capable of being accessed by the processor 1112 and storing data therein. In some embodiments, network device 1120 also includes a transceiver 1126 coupled to processor 1122 and capable of wirelessly transmitting and receiving data, signals, and information. In some embodiments, network device 1120 also includes a memory 1124 coupled to processor 1122 and capable of being accessed by processor 1122 and storing data therein. Therefore, the communication device 1110 and the network device 1120 wirelessly communicate with each other via the transceiver 1116 and the transceiver 1126, respectively.

To aid in a better understanding, the following description of the operation, functions, and capabilities of each of the communication device 1110 and the network device 1120 is provided in the context of a mobile communication environment in which the communication device 1110 is in communication. Implemented in the device or the UE or implemented as a communication device or a UE, the network device 1120 is implemented in a network node (for example, a gNB or TRP) of a communication network (for example, a 5G/NR mobile network) or as a network of a communication network. Node implementation.

In one aspect of the invention, the processor 1112 of the communication device 1110 can construct a codebook that includes a plurality of precoders. Additionally, the processor 1112 can process the information using the codebook. Additionally, the processor 1112 can transmit the processed information to the network device 1120 via the transceiver 1116. In some embodiments, when constructing the codebook, the processor 1112 can select a candidate codebook from a single-order codebook or a two-stage codebook. And, the processor 1112 can perform permutation on the candidate precoder.

In some embodiments, when permutation is performed on the candidate precoder, processor 1112 can perform multiple permutations on the candidate precoder to construct a codebook. In some embodiments, the plurality of permutations may cover a plurality of MUBs, a plurality of codebooks specified in a 3rd Generation Partnership Project (3GPP) specification, or a combination thereof.

In some embodiments, processor 1112 can perform a plurality of operations while building a codebook. For example, the processor 1112 can select an initial codebook from a plurality of codebooks specified in the 3GPP specifications. Moreover, the processor 1112 can expand the initial codebook to obtain a codebook by performing one or more permutations on the initial codebook using one or more permutation matrices. In some embodiments, the feedback overhead of the codebook may remain unchanged compared to the feedback overhead of the initial codebook.

In some embodiments, when performing permutation on the candidate precoder, processor 1112 can select a permutation matrix from a plurality of permutation matrices. Moreover, processor 1112 can apply a permutation matrix to the candidate precoder to expand the candidate precoder.

In some embodiments, upon selection of the permutation matrix, the processor 1112 can receive signaling from the network device 1120, either dynamically or semi-statically, indicating the selection of the permutation matrix used to construct the codebook.

In some embodiments, upon receiving signaling, the processor 1112 can receive RRC signaling or MAC CE as part of the CSR or independently of the CSR.

In some embodiments, upon selecting a permutation matrix, processor 1112 can select a permutation matrix based on an indication as part of the codebook.

In some embodiments, each of the plurality of permutation matrices may correspond to a respective one or more antenna layout scenes or one or more codewords.

In some embodiments, the candidate precoder may be a rank 2 precoder.

In some embodiments, the codebook can be a rank 2 codebook having the following structure:

among them, , , And where, Represents a common phase coefficient, where , with , .

In some embodiments, when constructing the codebook, the processor 1112 can construct the codebook according to the first structure described above:
Multiple numbers can be defined by one of the following matrix:
Eight matrix , From , , ,among them , ,or
2. Eight matrices , From , ,among them And the rank 2 precoder can be given by:
, .

In some embodiments, when constructing the codebook, the processor 1112 can construct the codebook according to the second structure described above:
1. Eight matrices come from , , ,among them , .
2. Eight matrices come from , ,among them And the rank 2 precoder can be given by:
, .

In some embodiments, when constructing the codebook, the processor 1112 can construct the codebook according to the third structure described above:
Four matrices From , , ,among them And the rank 2 precoder can be given by:
, Or from , or , Any of the eight matrixes, of which .

In some embodiments, when constructing the codebook, the processor 1112 may expand the first codebook by applying a plurality of permutation matrices to the first codebook and constructing the codebook as an antenna/reindex.

In some embodiments, the processor 1112 can receive signaling from the network device 1120 via the transceiver 1116, the signaling indicating the order in which the plurality of SRS resources are mapped to the plurality of antennas at the communication device 1120 for uplink transmission. . In some embodiments, each of the one or more antennas may be configured using a codebook to map to any of the plurality of SRS resources for uplink transmission.

In some embodiments, the processor 1112 can receive signaling from the network device 1120 via the transceiver 1116 indicating that the plurality of SRS resources are mapped to the plurality of antennas at the communication device 1110 for uplink transmission. Sequence related permutations. In some embodiments, the antenna 埠 can be fixedly mapped to a plurality of SRS resources for uplink transmission using a codebook.

In some embodiments, the signaling also includes a PMI. In some embodiments, the permutation may be part of a PMI definition associated with the PMI.

In some embodiments, the processor 1112 can receive signaling from the network device 1120 via the transceiver 1116 indicating the CSR associated with the codebook. Moreover, processor 1112 can select one or more of the codewords based on the CSR. In some embodiments, upon transmitting the processed information to the network device 1120, the processor 1112 can transmit the processed information to the network device 1120 using one or more codewords.

In some embodiments, upon receiving signaling from the network device 1120 indicating the CSR, the processor 1112 can receive the CSR with the bitmap through RRC signaling. In some embodiments, the length of the bitmap is equal to the number of precoders in the codebook.
Explanatory process

Figure 12 depicts an example process 1200 in accordance with an embodiment of the present invention. Whether partially or completely, process 1200 is an example embodiment of various processes, scenarios, schemes, methods, concepts, and techniques for codebook-based uplink transmission in wireless communication of the present invention. Process 1200 represents an aspect of the feature implementation of communication device 1110. Process 1200 can include one or more operations, actions, or functions, as shown in one or more of steps 1210, 1220, 1230, and 1240. Although illustrated as discrete steps, the various steps of process 1200 can be divided into additional steps, combined into fewer steps, or deleted, as desired. Moreover, the steps of process 1200 may be performed in the order shown in FIG. 12, or in other sequences, and one or more steps of process 1200 may be repeated one or more times. Process 1200 is implemented by communication device 1110 or any suitable UE or machine type device. For illustrative purposes only, but not limited thereto, the communication device 1110 is referred to as a UE, and the network device 1120 serves as a background description process 1200 for a network node (e.g., gNB) of the wireless network. Process 1200 begins at step 1210.

At step 1210, process 1200 involves processor 1112 of communication device 1110 constructing a codebook including a plurality of precoders. Process 1200 proceeds from step 1210 to step 1220.

At step 1220, process 1200 involves processor 1112 processing the information using the codebook. Process 1200 proceeds from step 1220 to step 1230.

At step 1230, process 1200 involves processor 1112 transmitting the processed information to network device 1120 via transceiver 1116.

In constructing the codebook, process 1200 further involves processor 1112 executing a plurality of operations represented by sub-steps 1212 and 1214.

At sub-step 1212, process 1200 involves processor 1112 selecting a candidate precoder from a single order codebook or a two order codebook. Process 1200 proceeds from sub-step 1212 to sub-step 1214.

At sub-step 1214, process 1200 involves processor 1112 performing a permutation on the candidate precoder.

In some embodiments, when permutation is performed on the candidate precoder, process 1200 involves processor 1112 performing a plurality of permutations on the candidate precoder to construct a codebook. In some embodiments, the plurality of permutations may cover a plurality of MUBs, a plurality of codebooks specified in the 3GPP specifications, or a combination thereof.

In some embodiments, when building a codebook, process 1200 involves processor 1112 performing a plurality of operations. For example, process 1200 involves processor 1112 selecting an initial codebook from a plurality of codebooks specified in the 3GPP specifications. In addition, the process 1200 involves the processor 1112 expanding the initial codebook to obtain a codebook by performing one or more permutations on the initial codebook using one or more permutation matrices. In some embodiments, the feedback overhead of the codebook may remain unchanged compared to the feedback overhead of the initial codebook.

In some embodiments, when performing permutation on the candidate precoder, process 1200 involves processor 1112 selecting a permutation matrix from a plurality of permutation matrices. In addition, process 1200 involves processor 1112 applying a permutation matrix to the candidate precoder to expand the candidate precoder.

In some embodiments, when selecting a permutation matrix, process 1200 involves processor 1112 receiving signaling from network device 1120, either dynamically or semi-statically, indicating the selection of a permutation matrix used to construct the codebook.

In some embodiments, upon receiving signaling, the process 1200 involves the processor 1112 receiving RRC signaling or MAC CE as part of the CSR or independent of the CSR.

In some embodiments, when selecting a permutation matrix, process 1200 involves processor 1112 selecting a permutation matrix based on the indication as part of the codebook.

In some embodiments, each of the plurality of permutation matrices may correspond to a respective one or more antenna layout scenes or one or more codewords.

In some embodiments, the candidate precoder may be a rank 2 precoder.

In some embodiments, the codebook can be a codebook having the following structure:

among them, , , And where, Representing a common phase coefficient, wherein , with , .

In some embodiments, when constructing the codebook, process 1200 involves processor 1112 constructing a codebook in accordance with the first structure described above:
Multiple numbers can be defined by one of the following matrix:
3. Eight matrices , From , , ,among them , ,or
4. Eight matrices , From , ,among them And the rank 2 precoder can be given by:
, .

In some embodiments, when constructing the codebook, process 1200 involves processor 1112 constructing a codebook in accordance with the second structure described above:
3. Eight matrices , , ,among them , ,
4. Eight matrices come from , ,among them And the rank 2 precoder can be given by:
, .

In some embodiments, when constructing the codebook, process 1200 involves processor 1112 constructing a codebook in accordance with the third structure described above:
2. Four matrices From , , ,among them And the rank 2 precoder can be given by:
, Or from , Any of the eight matrixes, of which .

In some embodiments, when constructing the codebook, the process 1200 involves the processor 1112 expanding the first codebook by applying a plurality of permutation matrices to the first codebook and constructing the codebook as an antenna/reindex.

In some embodiments, the process 1200 further involves the processor 1112 receiving signaling from the network device 1120 via the transceiver 1116, the signaling indicating that the plurality of SRS resources are mapped to the plurality of antennas at the communication device 1120 for uplink The order of transmission. In some embodiments, each of the one or more antennas may be configured using a codebook to map to any of the plurality of SRS resources for uplink transmission.

In some embodiments, the process 1200 further involves the processor 1112 receiving signaling from the network device 1120 via the transceiver 1116, the signaling indicating mapping to the plurality of SRS resources to the plurality of antennas at the communication device 1110 for uplink The order related to the transmission of the road. In some embodiments, the antenna 埠 can be fixedly mapped to a plurality of SRS resources for uplink transmission using a codebook.

In some embodiments, the signaling also includes a PMI. In some embodiments, the permutation may be part of a PMI definition associated with the PMI.

In some embodiments, process 1200 further involves processor 1112 performing additional operations. For example, process 1200 involves processor 1112 receiving signaling from network device 1120 via transceiver 1116 indicating the CSR associated with the codebook. In addition, process 1200 involves processor 1112 selecting one or more codewords based on the CSR. In some embodiments, when transmitting processed information to network device 1120, process 1200 involves processor 1112 transmitting the processed information to network device 1120 using one or more codewords.

In some embodiments, upon receiving signaling from the network device 1120 indicating CSR, the process 1200 involves the processor 1112 receiving a CSR with a bitmap through RRC signaling. In some embodiments, the length of the bitmap is equal to the number of precoders in the codebook.
Supplementary explanation

The subject matter described in the present invention is sometimes exemplified as including different elements within or connected to different other elements. It will be understood that the depicted architectures are merely examples and, in fact, many other architectures for implementing the same functionality can be implemented. In a conceptual sense, any component arrangement for achieving the same function is effectively "associated" such that the desired functionality is achieved. Thus, any two components of the present invention that are combined to implement a particular function can be seen as being "associated" with each other, such that the desired functionality is achieved, regardless of the architecture or the intermediate components. Likewise, any two elements so associated are also considered to be "operably connected" or "operably coupled" to each other to achieve the desired function, and any two elements that can be so associated are also "Operably coupled" to each other to achieve the desired functionality. Specific examples of operative coupling include, but are not limited to, physically configurable and/or physically interacting elements and/or wirelessly interactable and/or wirelessly interactable elements and/or logically interacting and/or logically interactable Components.

In addition, with respect to the use of substantially any plural and/or singular terms in the present invention, one of ordinary skill in the art can convert the plural to the singular and/or the singular to the plural to the context and/or application. . For the sake of clarity, various singular/complex permutations are explicitly set forth in the present invention.

In addition, it should be understood by those of ordinary skill in the art that, in general, the terms used in the present invention, particularly in the scope of the accompanying claims (e.g., the subject matter of the accompanying claims), are generally intended as an "open" term. For example, the term "including" should be interpreted as "including but not limited to", the term "having" should be interpreted as "having at least", and the term "including" should be interpreted as "including but not limited to". It is also to be understood by those of ordinary skill in the art that the present invention is not to be construed as being limited by the scope of the claims. For example, to assist in understanding, the following appended claims may include the use of the introductory phrases "at least one" and "one or more" to introduce a claim. However, the use of these phrases should not be construed as implying that the incorporation of the indefinite article "a" or "an" Embodiments, even when the scope of the application includes the indefinite article "one or plural" or "at least one" and the indefinite article such as "a" or "an", for example, "a" and/or "A" should be interpreted to mean "at least one" and "one or plural", as is the case with the definite article used to introduce the scope of the patent application. In addition, even if a specific number of incorporated patent claim statements are explicitly stated, those of ordinary skill in the art will recognize that this statement should be construed to mean at least the stated quantities, for example, "Two statements" means at least two statements or two or a plurality of statements. Further, in those cases in which a similar convention of "at least one of A, B, and C, etc." is used, generally, from the aspect that the person having ordinary skill in the art will understand the convention, the configuration is expected, for example, " A system having at least one of A, B, and C" will include, but is not limited to, having only A, only B, only C, A, and B together, A and C together, B and C together, and/or A, B, and C. A system that waits together. In other cases where a convention similar to "at least one of "A, B, or C, etc." is used, generally, from the aspect that the person having ordinary skill in the art will understand the convention, the configuration is expected, for example, "has A system of at least one of A, B or C" will include, but is not limited to, having only A, only B, only C, A and B together, A and C together, B and C together and/or A, B and C together Waiting for the system. It should also be understood by those of ordinary skill in the art that any conjunction and/or phrase (whether in the specification, the scope of the patent, or the drawings) that represent two or more alternative terms should be understood as being. The possibility of one of the terms, any one of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibility of "A" or "B" or "A and B."

In view of the foregoing, it will be appreciated that the various embodiments of the present invention are described herein, and the various modifications of the invention may be made without departing from the scope and spirit of the invention. Therefore, the various embodiments disclosed in the present invention are not intended to be limiting, and the true scope and spirit are indicated by the following claims.

100, 1200‧‧‧ process

110‧‧‧User equipment

120‧‧‧Network node

(1), (2), (2A), (2B), (2C), (3), (4), (5), 1210, 1220, 1230‧‧

1212, 1214‧‧ substeps

200, 300, 400‧‧‧ concept

500‧‧‧ Rank 1 code book design

600A, 600B, 800, 900, 1000‧‧‧ scenes

700‧‧‧ Rank 2 code book design

1100‧‧‧Wireless communication environment

1110‧‧‧Communication device

1112, 1122‧‧‧ processor

1114, 1124‧‧‧ memory

1116, 1126‧‧‧ transceiver

1120‧‧‧Network devices

The drawings are included to provide a further understanding of the invention, and the drawings are incorporated in and constitute a part of the invention. The drawings illustrate the embodiments of the invention and, together with It is understood that the drawings are not necessarily to scale unless the

1 is an exemplary message chain diagram of a process for UL based codebook transmission involving UEs and network nodes in accordance with the present invention.

Figure 2 is an illustration of an exemplary concept in accordance with the present invention.

Figure 3 is an illustration of an exemplary concept in accordance with the present invention.

Figure 4 is an illustration of an exemplary concept in accordance with the present invention.

Figure 5 is a plan diagram of a rank 1 codebook proposed in accordance with the present invention.

Figure 6 is an illustration of an exemplary scene in accordance with the present invention.

Figure 7 is a diagram of a rank 2 codebook design in accordance with the present invention.

Figure 8 is an illustration of an exemplary scene in accordance with the present invention.

Figure 9 is an illustration of an exemplary scene in accordance with the present invention.

Figure 10 is an illustration of an exemplary scene in accordance with the present invention.

Figure 11 is a diagram of an exemplary wireless communication environment in accordance with an embodiment of the present invention.

Figure 12 is a flow diagram of an exemplary process in accordance with an embodiment of the present invention.

Claims (20)

  1. A method comprising: Constructing, by a processor of a user equipment (UE), a codebook including a plurality of precoders; The code book is used by the processor to process information; Sending the processed information to the network node of one of the wireless networks by the processor, Wherein, the construction of the code book comprises: Selecting a candidate precoder from a single order code book or a double order code book; A permutation is performed on the candidate precoder.
  2. The method of claim 1, wherein the performing of the permutation on the candidate precoder comprises performing a plurality of permutations on the candidate precoder to construct the codebook, and the plurality of permutations Covering a plurality of mutually unbiased bases, a plurality of codebooks specified in the 3rd Generation Partnership Project (3GPP) specification, or a combination thereof.
  3. The method of claim 1, wherein the construction of the codebook comprises: Selecting an initial codebook from a plurality of codebooks specified in the Third Generation Partnership Project (3GPP) specification; Enlarging the initial codebook to obtain the codebook by performing one or more permutations on the initial codebook having one or more permutation matrices, Wherein, the feedback overhead of one of the codebooks remains unchanged compared to the feedback overhead of one of the initial codebooks.
  4. The method of claim 1, wherein the performing of the permutation on the candidate precoder comprises: Selecting a permutation matrix from a plurality of permutation matrices; The permutation matrix is applied to the candidate precoder to expand the candidate precoder.
  5. The method of claim 4, wherein the selecting of the permutation matrix comprises dynamically or semi-statically receiving a signaling from the network node, the signaling indicating the permutation used to construct the codebook The choice of matrix.
  6. The method of claim 5, wherein the receiving of the signaling comprises receiving, as part of a codebook subset restriction (CSR), or independently of one of the CSRs, Radio Resource Control (RRC) signaling or a Media Access Control (MAC) Control Element (CE).
  7. The method of claim 4, wherein the selecting of the permutation matrix comprises selecting the permutation matrix based on an indication of one of the components of the codebook.
  8. The method of claim 4, wherein each of the plurality of permutation matrices corresponds to a respective one or more antenna layout scenes or one or more codewords.
  9. The method of claim 1, wherein the candidate precoder comprises a rank 2 precoder.
  10. The method of claim 1, wherein the codebook comprises a rank 2 code book having the following structure: among them, , , And where, Representing a common phase coefficient, wherein , with , .
  11. The method of claim 1, wherein the constructing of the codebook comprises constructing the codebook according to the following structure: Matrix: 1. Eight matrices , From , , ,among them, , , or 2. eight matrices , From , ,among them, And a rank 2 precoder can be given by: , .
  12. The method of claim 1, wherein the constructing of the codebook comprises constructing the codebook according to the structure of the codebook defined by one of the following: 1. Eight matrices are from , , ,among them, , . 2. Eight matrices come from , ,among them, And a rank 2 precoder can be given by: , .
  13. The method of claim 1, wherein the constructing of the codebook comprises constructing the codebook according to the structure of the codebook defined as follows: 1. Four matrices are from , , ,among them, And a rank 2 precoder can be given by: , Or from , or , Any of the eight matrixes, of which .
  14. The method of claim 1, wherein the constructing of the codebook comprises: applying a plurality of permutation matrices to a first codebook, constructing the codebook as an antenna, re-indexing to expand the first Code book.
  15. The method of claim 1, further comprising: Receiving, by the processor, signaling from the network node, the signaling indicating a sequence in which a plurality of sounding reference signal (SRS) resources are mapped to a plurality of antennas at the UE for performing an uplink transmission; Wherein, the codebook is used to configure one or more of the antenna ports to map to any sounding reference signal resource of the SRS resource for the uplink transmission.
  16. The method of claim 1, further comprising: Receiving, by the processor, a signaling from the network node, the signaling indicating a sequence of mapping with a plurality of sounding reference signal (SRS) resources to a plurality of antennas at the user equipment for performing an uplink transmission Related one replacement, The antenna is fixedly mapped to the plurality of SRS resources for the uplink transmission using the codebook.
  17. The method of claim 16, wherein the signaling further comprises a precoding matrix indication (PMI) and the permutation is a component of one of the PMI definitions associated with the PMI.
  18. The method of claim 1, further comprising: Receiving, by the processor, a signaling from the network node, the signaling indicating a codebook subset restriction (CSR) associated with the codebook; Selecting one or more codewords in the codebook by the processor based on the CSR, The transmitting of the processed information to the network node includes transmitting the processed information to the network node using the one or more codewords.
  19. The method of claim 18, wherein the receiving indication of the signaling from the network node comprises receiving the CSR of the CSR having a bitmap through a Radio Resource Control (RRC) signaling.
  20. The method of claim 19, wherein one of the bitmaps has a length equal to one of the precoders in the codebook.
TW107133050A 2017-09-19 2018-09-19 Method for codebook-based uplink transmission TW201921864A (en)

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JP5322327B2 (en) * 2009-01-05 2013-10-23 マーベル ワールド トレード リミテッド Precoding of codebook for MIMO communication system
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