TWI687071B - Method for codebook-based uplink transmission - Google Patents

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

Uplink transmission method based on code book

The invention relates to wireless communication technology. More specifically, the present invention relates to uplink transmission (UL) based on codebooks in wireless communication.

Unless otherwise stated herein, the methods described in this section are not prior art to the patent application scope of the invention listed below and are not admitted to be prior art by inclusion in this section.

Compared with the downlink (DL) codebook design, there are significant differences in network node implementation and deployment scenarios. Due to different gain set points, the problem of relative phase discontinuity (RPD) has been identified in Long-Term Evolution (LTE) mobile communication systems. Due to the limited form factor, and the given real-time radiation/propagation environment is susceptible to effects such as handheld devices, complex local scattering, etc., there may also be possible antenna gain differences on the user equipment (UE) side. When using multiple tablets at the UE, there may also be frequency coherence issues 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) two waveforms, and they have a peak-to-average power ratio (PAPR) for the precoder There are different needs for maintenance.

The following summary is only illustrative and is not intended to be limiting in any way. That is, the following overview is provided to introduce the concepts, points, benefits, and advantages of the novel and non-obvious technologies described herein. The selected embodiment will be further described in the detailed description below. Therefore, the following summary is not intended to identify the essential characteristics of the claimed subject matter nor to determine the scope of the claimed subject matter.

Regarding uplink transmission based on codebooks in wireless communication, the present invention proposes a variety of solutions, solutions, methods and devices. According to the various schemes proposed here, the codebook can be designed to be stable to different scenarios. The codebook may cover a plurality of target codebooks optimized for a specific antenna configuration and/or scenario (eg, version 8 (Rel-8) DL four transmitter (4Tx) rank 2 codebook, version 10 (Rel- 10) Rank 4 Mutually-unbiased base (MUB) extension of UL 4Tx rank 1 codebook and version 15 (Rel-15) DL NR 4Tx rank 2 codebook). It is believed that the proposed solutions, solutions, methods and devices can reduce transmission overhead, improve system performance and reduce UE power consumption.

In one aspect of the invention, a method involves the UE's processor constructing a codebook that includes multiple precoders. The method also involves the processor using the codebook to process information. The method further involves the processor sending the processed information to a network node of the wireless network. When constructing the codebook, the method involves the processor selecting a candidate precoder from a single-order codebook or a dual-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 can communicate wirelessly with network nodes of a wireless network. The processor can: (a) construct a codebook including a plurality of precoders; (b) use the codebook to process information; and (c) send the processed information to a network node of a wireless network via the transceiver . When constructing the codebook, the processor can select a candidate precoder from a single-order codebook or a double-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 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 of its variants/derivatives can be implemented in, for and through other types of wireless access technologies, networks and network topologies. Therefore, the scope of the present invention is not limited to the examples described herein.

100, 1200: progress

110: user equipment

120: network node

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

1212, 1214: substep

200, 300, 400: concept

500: Rank 1 codebook design

600A, 600B, 800, 900, 1000: scene

700: Rank 2 codebook design

1100: wireless communication environment

1110: Communication device

1112, 1122: processor

1114, 1124: memory

1116, 1126: transceiver

1120: Network device

The drawings are included to provide a further understanding of the invention, and at the same time, the drawings are incorporated and form part of the invention. The drawings describe the embodiments of the present invention and together with the description are used to explain the principles of the present invention. It can be understood that, in order to clearly illustrate the concept of the present invention, the drawings are not necessarily drawn to scale, and some elements may be shown out of proportion to the dimensions in the actual implementation.

FIG. 1 is an example message chain diagram of a process for UL-based codebook transmission involving UEs and network nodes according to the present invention.

Figure 2 is an exemplary conceptual diagram according to the present invention.

Figure 3 is an exemplary conceptual diagram according to the present invention.

Figure 4 is an exemplary conceptual diagram according to the present invention.

Fig. 5 is a design diagram of a rank 1 codebook according to the present invention.

Fig. 6 is an exemplary scene diagram according to the present invention.

Figure 7 is a design diagram of a rank 2 codebook proposed according to the present invention.

Figure 8 is an exemplary scene diagram according to the present invention.

Fig. 9 is an exemplary scene diagram according to the present invention.

Fig. 10 is an exemplary scene diagram according to the present invention.

FIG. 11 is an exemplary wireless communication environment diagram according to an embodiment of the present invention.

Figure 12 is a flowchart of an example process according to an embodiment of the present invention.

In the following, examples and implementations of the claimed subject matter will be described in detail. However, it should be understood that the disclosed embodiments and implementations are merely illustrations of the claimed subject matter that can be implemented in various forms. The invention can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that the description of the present invention is thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the following description, conventional features and technical details are omitted to avoid unnecessarily obscuring the presented embodiments and implementations.

Overview

Embodiments of the present invention relate to various technologies, methods, solutions, and/or solutions related to UL transmission based on codebooks in wireless communication. According to the invention, many possible solutions can be realized individually or jointly. That is, although these possible solutions are described separately below, two or more of these possible solutions may be implemented in one combination or another combination.

NR uplink codebook design

Since the codebook used for NR needs to support multiple wireless environments and various UE practical problems, the present invention proposes a variety of methods and/or schemes to design rank 2 or higher rank codebooks as follows, 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 "string equivalent" can be used to refer to two codewords with a string spacing of 0. In addition, in the first codebook (codebook 1), there is a chord distance of any codeword of the second codebook (codebook 2) In case of equivalent codewords, codebook 1 can be considered to "overwrite" codebook 2. In addition, for any one of the two codebooks, when there is an equivalent chord pitch codeword in the other codebook, the "chord pitch equivalent" can be used to refer to the two codebooks. In other words, they cover each other.

In addition to the above design and structure, the following describes another design and structure according to 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 Rel-10 UL 4Tx rank 1 codebook rank 2 MUB extension, 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:

,k=1,2,…,16矩陣： According to the proposed scheme, for the first method (or "first structure"), a plurality of

, k =1,2,...,16 matrix:

，k=1,…,8，來自

，

，

， 其中c=0,2,

=1,j。 1. Eight matrices

, K =1,…,8, from

,

,

, Where c =0,2,

=1, j .

，

，其中

=1,j,-1,-j。 2. Eight matrices C ₂ ^(k) , k =9,...,16, from

,

,among them

=1, j , -1,- j .

n=0,1,2,3，k=1,2,…,16。 Here, the rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16.

,k=1,2,…,16矩陣： According to the proposed scheme, for the second method (or "second structure"), a plurality of

, k =1,2,...,16 matrix:

，k=1,…,8，來自

，

，

， 其中c=0,2，

=1,j。 1. Eight matrices

, K =1,…,8, from

,

,

, Where c = 0, 2,

=1, j .

，k=9,…,16，來自

，

，其中

=1,j,-1,-j。 2. Eight matrices

, K =9,...,16, from

,

,among them

=1, j , -1,- j .

n=0,1,2,3，k=1,2,…,16。 Here, the rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16.

Generally speaking, in the second structure, the diagonal matrix R (for each θ , R = diag ([1 e ^jθ 1 e ^jθ ])) can be multiplied from the left by 8 of 2 matrices and 8 of 1 Matrix to obtain another equivalent codebook of chord distance in the first structure.

，k=1,2,…,4矩陣： According to the proposed scheme, for the third method (or "third structure"), a plurality of

, K =1,2,...,4 matrix:

，k=1,2,…,4，來自

，

，

，其 中

=1,j。 1. Four matrices

, K =1,2,...,4, from

,

,

,among them

=1, j .

n=0,1,…,7，k=1,2,…,4，或

為來自

，

之八個矩陣之任一矩陣，其中

=1,j,-1,-j。 Here, the rank 2 precoder can be given by:

n =0,1,...,7, k =1,2,...,4, or

For

,

Any of the eight matrices, where

=1, j , -1,- j .

結構中使用

，

，因為他 們產生之碼字與

，

產生之碼字弦距等效。值得注意的是，在所有結構中，可以取出一些碼字(例如，不需要覆蓋現存碼書中之所有碼字)。此外，可以包括另外之碼字。在NR DL 4Tx碼書設計中，即使他們生成弦距等 效之碼書，

可以與

一起被包括。這裡可以採用類似之做法，C ₂ ^(k)可以包括更多矩陣。 Or, you can

Use in structure

,

Because the codewords they produce are

,

The chord pitch of the generated code words is equivalent. It is worth noting that in all structures, some code words can be taken out (for example, it is not necessary to cover all code words in the existing code book). In addition, additional codewords may be included. In the NR DL 4Tx codebook design, even if they generate codebooks with equivalent chord spacing,

With

Are included together. A similar approach can be used here, C ₂ ^(k) can include more matrices.

W ₁ ^(k) W ₂ ^(m)給出，其中1

k 1

K並且

表示置換矩陣。下文提供一個示例。 According to the proposed scheme, for the fourth method (or "fourth structure"), the codebook structure can be re-indexed as an antenna port. Therefore, a permutation matrix can be introduced in the codebook structure. From the first codebook, such as the double-order codebook W ₁ ^{( k )} W ₂ ^{( m ) in} TS 38.214 (v.0.1.2 September 2017 ⁾ , where k is a general index (for example, k =( i _{1 ,1} , i _1,2 , i _1,3 )), m is a general index (for example, m=( i ₂ )), the expanded codebook can be

W ₁ ^{( k )} W ₂ ^{( m ) is} given, where 1

k 1

K and

Represents a permutation matrix. An example is provided below.

Through the NR DL 4Tx codebook with L = 1, the following permutation matrix can be applied to the rank 2 precoder W ₁ ^{( k )} W ₂ ^{( m )} :

In this case, the beam group can be determined by k and the permutation matrix index. For the UE, the replacement matrix index can be determined for a long time (for example, through radio resource control (RRC) signaling and/or media access control (MAC) control element (CE) as a code book Subset restriction (codebook subset restriction, CSR) is part of or independent of CSR), therefore, compared with the initial codebook (for example, NR DL 4Tx codebook), the feedback overhead of the expanded codebook can be kept unchanged. Through the above example, the proposed design can cover Rel-8 rank 24 Tx codebook and Rel-15 NR rank 24 Tx codebook.

和

來擴大諸如

D n

之碼書。 It is worth noting that for other ranks, the same or different permutation matrices can be identified to expand the codebook. In summary, applying the permutation matrix to existing or first codebooks to obtain expansion or second codebooks can be regarded as a general method for handling irregular antenna configurations. For the above-mentioned first structure, second structure and third structure, using the rotation of the first structure, second structure and third structure, a plurality of permutation matrices can be used

with

To expand such as

D n

Code book.

Support unified codebook design for multiple scenarios

In 5G/NR mobile communications, a variety of scenarios can be encountered in the application of UL codebooks, including RPD, non-common-mode phase noise, antenna gain imbalance (AGI), etc. In addition to uniform linear array (ULA) and non-ULA antenna configurations, NR UL codebooks are also expected to support these scenarios. Specifically, the codebook has all 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 ULA and non-ULA antenna configurations, a dual-order codebook structure with a first structure ("Structure 1") or a second structure ("Structure 2") may be used, as described below .

For structure 1, let N ₁ = 2, N ₂ = 1, O ₁ = 4, L = 2, the following can be defined:

In this design:

as well as

，給出，其中，0

k

N ₁ O ₁/2-1=3， 1

i,j

2，並且0

n

3。值得注意的是，(i,j)=(1,1),(1,2),(2,1),(2,2)，

可以從1、j、-1、-j中取值，e _i 是L×1向量，其在元素i處為1，其他地方為零。還需注意的是，在L=1時，存在Rel-10 4Tx UL碼書之16個秩1預編碼器(Rel-10 4Tx UL碼書中之前16個預編碼器用於埠組合)和Rel-15 NR DL 4Tx碼書之32個秩1預編碼器。將這些向量集合在一起，可以得到40個特有預編碼器(兩個碼書中共有8個預編碼器)。 The rank 1 precoder can be obtained by W _k (1)

, Given, where, 0

k

N ₁ O ₁ /2-1=3, 1

i , j

2, and 0

n

3. It is worth noting that ( i , j )=(1,1),(1,2),(2,1),(2,2),

Values can be taken from 1, j , -1, -j , e _i is an L × 1 vector, which is 1 at element i and zero elsewhere. It should also be noted that when L =1, there are 16 rank 1 precoders in the Rel-10 4Tx UL codebook (the previous 16 precoders in the Rel-10 4Tx UL codebook are used for port combination) and Rel- 15 rank 1 precoders of 15 NR DL 4Tx codebook. Collecting these vectors together, you can get 40 unique precoders (a total of 8 precoders in the two codebooks).

It should also be noted that the allowable range of each parameter is limited by CSR. To support the same 4Tx port combined with rank 1 precoder in Rel-10 UL 4Tx codebook, CSR can be considered. For example, the beam group limit k = 0, 2 (eg, k ≠ 1, 3) can be adopted, which can save one bit on the signaling of W ₁ . In addition, the allowable common phase value depends on the beam selection pair k =0 and k =2. When k =0, for beam selection ( i , j )=(1,1) or (2,2), it is allowed to take the common phase value from { j ,- j }; for beam selection ( i , j )= (1,2) or (2,1), it is allowed to take the common phase value from {1,-1}. When k = 2, for beam selection ( i , j ) = (1,2) or (2, 1), it is allowed to take the common phase value from { j ,- j }; for beam selection ( i , j ) = (1,1) or (2,2), it is allowed to take the common phase value from {1,-1}. Therefore, one bit can be saved on W ₂ signaling.

In order to support the same rank 1 precoder of the Rel-15 DL 4Tx codebook, the following CSR can be used: beam selection ( i , j ) is limited to (1,1) or (2,2). (For example, (1,2) and (2,1) are not allowed).

在此設計中： 令

For structure 2, let N ₁ =2, N ₂ =1, O ₁ =4, L =4, the following content can be defined:

In this design:

as well as

Where e _i is an L ×1 vector, which is 1 at element i and zero elsewhere.

,0

k

N ₁ O ₁/4-1=1，0

n

3。 The rank 1 precoder can be given by: W _k (1)

,0

k

N ₁ O ₁ /4-1=1, 0

n

3.

可以從1、j、-1、-j中取值。因此，波束選擇有八個選項，並且正交相移鍵控(quadrature phase-shift keying，QPSK)可用於共相位。 Here, ( i , j )=(1,1),(2,2),(3,3),(4,4),(1,3),(3,1),(2,4) ,(4,2),

It can take values from 1, j , -1, -j . Therefore, there are eight options for beam selection, and quadrature phase-shift keying (QPSK) can be used for co-phase.

Similar to the structure 1 case, CSR can also be used to reduce signaling overhead and restore NR DL 4Tx codebook and Rel-10 UL 4Tx codebook. In order to recover the Rel-10 UL 4Tx codebook, the first beam group (and no other beam groups) is needed (for example, k =0). For beam selection (1,1), (2,4), (3,3) and (4,2), the common phase value is limited to { j ,- j }. For beam selection (1,3), (2,2), (3,1) and (4,4), the common phase value is limited to {1,-1}. To recover the NR DL 4Tx codebook, beam selection ( i , j ) is limited to (1, 1), (2, 2), (3, 3), and (4, 4).

Conditional codebook use

By using conditional codebooks, the precoding actually used by the UE can be modified on the codeword given in the specification (for example, in TS 38.214) according to the signaling from the base station (for example, via dynamic or semi-static signaling) Device. According to the solution proposed by the present invention, when the base station (eg, gNB) detects that the gain of one or more antenna ports from the UE is low, the base station can semi-statically send signals to the UE through RRC signaling or MAC CE, The UE will not select certain antennas. For example, the base station can send a signal to the UE using a dot pattern, and each "0" in the dot pattern indicates that the corresponding antenna port of the UE is closed (for example, the dot pattern [1 0 1 0] instructs the UE to shut down four of the UE (The second and fourth antennas). Therefore, all 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 according to the instruction from the base station, some elements of the indicated precoder can be turned off. Advantageously, the design of dynamic signaling and codebook can be simplified. It is worth noting that W ₁ may also be included in semi-static signaling/MAC CE.

According to the solution proposed by the present invention, from the point of view of the composition of the coherent group 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 related to the antenna at the UE Coherent group constraints. Since the base station performs SRS calibration based on 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, which is related to the precoder extracted from the UE's SRS/DMRS transmission. If the remedial steps of the base station are still insufficient, or the base station is physically unable to remedy the situation (for example, non-common mode phase noise at the UE), the base station sends a codebook constraint signal to the UE. In this case, the meaning of the codebook (built by structure 1 or structure 2) can be modified.

，在結構1中，如果j=1，那麼：(1)預編碼器可用於相干組1，(2)僅預編碼器之元件1和2可用於相干組1，以及(3)對於相干組2中之埠，可以關閉發送功率。否則，如果j=2，那麼：(1)預編碼器可用於相干組2，(2)僅元件3和4可用於相干組2，以及(3)對於相干組1中之埠，可以關閉發送功率。在相干組之天線埠來自非相鄰索引之情況下，(例如，相干組中之埠1和3，相干組2中之埠2和4)，類似之流程也是可行的。 When there are two coherent groups, for W _k (1)

, In structure 1, if j =1, then: (1) the precoder can be used for coherent group 1, (2) only the elements 1 and 2 of the precoder can be used for coherent group 1, and (3) for the coherent group Port 2 can turn off the transmission power. Otherwise, if j = 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 the ports in coherent group 1, the transmission can be turned off power. In the case where the antenna ports of the coherent group come from non-adjacent indexes (eg, ports 1 and 3 in the coherent group, and ports 2 and 4 in the coherent group 2), a similar process is also feasible.

i,j

2,0

n

3 0

k

3。 According to 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: 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.

Then, the precoders with indexes 0, 8, 16, 24, 32, 40, 48, and 56 can be used for the port combination (1,2) and the indexes 1, 9, 17, 25, 33, 41, 49, and 57 The precoder can be used for port combination (1, 3), etc., and the first two components can be used for related antennas. For example, when the index is 9, the precoder [1,-1, j , j ] ^T is specific because it is associated with port (1, 3), then, 1 is applied to port 1, and -1 is applied to the port 3. Close ports 2 and 4.

It is worth noting that if the base station can configure a bitmap for an addressable precoder for dynamic signaling, it is not necessary to enforce the constraints in the NR specification. For example, even if there are more than 64 precoders in beam group k , the base station can configure a dot pattern so that the total addressable precoders are limited to no more than 64, and W ₂ may have 6 bits.

Rank 2 precoder construction

在此，

，r=0,1，l=0,1。此外，c _r,l 表示共相位係數，其中，c _0,1=1、c _1,0=-c _1,1和c _1,0

{1,j}， (

,

)

{(0,0),(O ₁/2,0),(O ₁,0),(O ₁．3/2,0)}。 According to the scheme proposed by the present invention, the rank 2 codebook structure can start from NR as follows:

here,

, R =0,1, l =0,1. In addition, c _r,l represents the common phase coefficient, where c _0,1 =1, c _1,0 =- c _1,1 and c _1,0

{1, j }, (

,

)

{(0,0),( O ₁ /2,0),( O ₁ ,0),( O ₁ .3/2,0)}.

對於DFT-OFDM波形，UE可以理解如下：

在此，X表示在給定天線埠之指定層無傳輸。在給定示例中，UE不在第一層(layer 1)使用埠3和4，並且UE不在第二層(layer 2)使用埠1和2。基地台可以為所有碼字提供修改掩模(此示例中使用[1 X；1 X；X 1；X 1])，或者，可以為碼字使用不同之修改掩模。可以驗證的是，透過對秩2之NR Rel 4Tx DL碼字應用掩模可以生成Rel-10 4Tx UL之大部分PAPR保持秩2碼字。因此，用於不同目的之碼字可以嵌入到單個碼書中，並且可以依據來自基地台之信令(例如，經由RRC信令和/或MAC CE)修改UE處採用之含義。所應用之預編碼器可以是動態信令和半靜態信令之結果，包括可能之CSR。在相干組配置和相應碼書之使用方面使用如第1圖所示之進程。第1圖描述了依據本發明之涉及UE 110和網路節點120之用於UL基於碼書傳輸之進程100之示例消息鏈。 Similar to the method of antenna closing and phase coherent group described above, for the DFT-OFDM waveform, the rank 2 codewords thus obtained can be modified as necessary to export the PAPR holding codewords. For example, the base station can provide the TPMI mapped to the rank 2 codeword to the UE as follows (unit amplitude and phase angle of each element):

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

Here, X indicates that there is no transmission at a specified layer of a given antenna port. In the given example, the UE does not use ports 3 and 4 at the first layer (layer 1), and the UE does not use ports 1 and 2 at the second layer (layer 2). The base station can provide a modification mask for all code words ([1 X; 1 X; X 1; X 1] is used in this example), or a different modification mask can be used for the code word. It can be verified that by applying a mask to the rank 2 NR Rel 4Tx DL codeword, most of the PAPR of the Rel-10 4Tx UL can be generated to maintain the rank 2 codeword. Therefore, codewords for different purposes can be embedded in a single codebook, and the meaning adopted at the UE can be modified according to 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. Use the process shown in Figure 1 for the configuration of coherent groups and the use of corresponding codebooks. Figure 1 depicts an example message chain for a process 100 for UL codebook-based transmission involving a UE 110 and a network node 120 according to the present invention.

Codebook-based transmission

According to the solution proposed by the present invention, the process shown in FIG. 1 can be used in the configuration of coherent groups and the use of corresponding codebooks. Figure 1 depicts an example message chain for a process 100 for UL codebook-based transmission involving a UE 110 and a network node 120 according to the present invention.

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

According to the solution proposed by the present invention, there are multiple options regarding the configuration of coherent groups and the use of codebooks. In the first option (option 1), the concept of coherent groups can be used to define codebooks, 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, the port selection codebook and the port selection combination codebook can recursively construct the codebook.

In the second option (option 2), the network node (eg, gNB) can notify the UE of the coherent group configuration through RRC signaling or MAC CE signals. In addition, dynamic signaling with UL DCI can be used to select one or more codewords from the codebook specifically defined for the coherent group configuration. 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) may notify the UE of the coherent group configuration through RRC signaling or MAC CE signals. Since there are four coherent codebooks (port selection codebooks) in which the number of codewords is limited, and the port selection codebooks can provide useful support for antenna gain imbalance (AGI), there are four The codebook of the coherent group can support 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 port selection codebook can be used in combination with a port combination codebook or a codebook constructed by two coherent groups recursively. 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 with a signal Codeword from port selection codebook or port combination codebook.

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

Port combination uplink codebook design

In summary, it is expected to support both ULA and non-ULA antenna configuration codebooks. 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 proposed according to the present invention. Referring to FIG. 5, the proposed rank 1 codebook design 500 may cover Rel-8 4-Tx DL codebook, Rel-10 UL 4Tx codebook and Rel-15 4-Tx DL codebook.

According to the solution proposed by the present invention, N ₁ =2, N ₂ =1, O ₁ =4 and L =2 can be used to define the proposed NR rank 1 precoder. Therefore, the definition is as follows:

以及

以及

make

as well as

as well as

W _k (1)

， 其中，0

k

N ₁ O ₁/2 1=3、1

i,j

2並且0

n

3。 The rank 1 precoder can be given by:

W _k (1)

, Where 0

k

N ₁ O ₁ /2 1=3, 1

i , j

2 and 0

n

3.

可以從1、j、-1、-j中取值。在此，e _i 是L×1向量，其在元素i處為1，其 他地方為零。還需注意的是，存在4Tx埠在L=1時組合了來自Rel-10 4Tx UL碼書之16個秩1預編碼器(Rel-10 4Tx UL碼書中之前16個預編碼器用於埠組合)和Rel-15 NR DL 4Tx碼書之32個秩1預編碼器。將這些向量集合在一起，可以得到40個特有之預編碼器(兩個碼書中共有8個預編碼器)。 It is worth noting that the allowed beam selection ( i , j ) = (1, 1), (1,2), (2, 1) or (2, 2) and

It can take values from 1, j , -1, -j . Here, e _i is an L ×1 vector, which is 1 at element i and zero elsewhere. It should also be noted that there are 4Tx ports that combine 16 rank 1 precoders from the Rel-10 4Tx UL codebook when L =1 (the previous 16 precoders in the Rel-10 4Tx UL codebook are used for port combination ) And 32 rank 1 precoders in the Rel-15 NR DL 4Tx codebook. Collecting these vectors together, you can get 40 unique precoders (a total of 8 precoders in the two codebooks).

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

To support the same 4Tx port combined with the rank 1 precoder in the Rel-10 UL 4Tx codebook, CSR can be used. For example, the beam group limit k = 0, 2 (eg, k ≠ 1, 3) can be adopted, which can save one bit on the signaling of W ₁ . In addition, the allowed common phase value depends on the beam selection pair. When k =0, for beam selection ( i , j )=(1,1) or (2,2), it is allowed to take the common phase value from { j ,- j }; for beam selection ( i , j )= (1,2) or (2,1), it is allowed to take the common phase value from {1,-1}. When k = 2, for beam selection ( i , j ) = (1,2) or (2, 1), it is allowed to take the common phase value from { j ,- j }; for beam selection ( i , j ) = (1,1) or (2,2), it is allowed to take the common phase value from {1,-1}. Therefore, one bit is saved on W ₂ signaling.

In order to support the same rank 1 precoder of Rel-15 DL 4Tx codebook, CSR can be used. Specifically, the beam selection ( i , j ) is limited to (1, 1) or (2, 2). For example, (1,2) and (2,1) are not allowed.

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

i

N由天線位置在波傳播方向上之投影d _i 確定。陣列響應向量可由相位分佈d ₁、d ₂、…和d _N 確定：

Figure 6 depicts example scenarios 600A and 600B according to the present invention. Referring to FIG. 6, scene 600A describes an example ULA response, in which a signal from a signal source collides with a uniform linear array. Usually in array signal processing, the signal model is used for reception. The signal model can also be used for transmission. Phase difference X _i between receivers, 1

i

N is determined by the projection d _{i of the} antenna position in the wave propagation direction. The array response vector can be determined by the phase distribution d ₁ , d ₂ , ... and d _N :

In the case of ULA, since d _i is a uniform difference (for example, d _{i +1} - d _i =△, and △ is the antenna pitch), its phase difference is also uniform. 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, the difference between adjacent projections d _i is not uniform. It is difficult to directly approximate P ( d ₁ , d ₂ ,..., d _N ) with any DFT beam. However, the phase distribution can be better approximated by rearranging d ₁ , d ₂ , ..., and d _N. For example, for a specific antenna layout, DFT beams can be used to approximate P ( d _N , d ₁ , d ₂ ,..., d _{N 1} ), on the contrary, P ( d ₁ , d ₂ ,..., d _N ). In other words, the front of the antenna port is very useful.

W ₁ ^(k) W ₂ ^(m)，其中，k是通用索引(例如，k=(i _1,1,i _1,2,i _1,3))，m是通用索引(例如，m=(i ₂))，如TS 38.214(V.0.1.2 2017年九月)中之i _1,1,i _1,2,i _1,3,i ₂，可以透過下式構建擴大之碼書

Π _p W ₁ ^(k) W ₂ ^(m) Starting with the first codebook (for example, a dual-order codebook):

W ₁ ^{( k )} W ₂ ^{( m )} , where k is a general index (for example, k =( i _1,1 , i _1,2 , i _1,3 )), and m is a general index (for example, m =( i ₂ )), such as i _1,1 , i _1,2 , i _1,3 , i _{2 in} TS 38.214 (V.0.1.2 September 2017), an expanded codebook can be constructed by the following formula

Π _p W ₁ ^{( k )} W ₂ ^{( m )}

p

P和Π _p 是置換矩陣。 Among them, 1

p

P and Π _p are permutation matrices.

It is worth noting that the number of code words in the expanded codebook is P times that of the first codebook. In the present invention, the process of generating the second codebook from the first codebook is called "port replacement".

Given the irregular antenna layout of the target, it is possible to identify the required port replacement. Since there are many different antenna layouts at the UE, a standard can be used to identify the shuffle parameters (Instead of identifying port replacements for specific antenna layouts). According to the solution proposed by the present invention, the larger codebook generated by port replacement covers as much as possible of Rel-8 DL codebook design and Rel-15 NR DL codebook design and MEL extension of Rel-10 UL codebook Of entries. Since the number of port replacements will directly cause the signaling overhead in UL DCI, it is also desirable to use port replacements as little as possible to cover the codes of reference codebooks (for example, Rel-8, Rel-10, Rel-15 codebooks) word.

Through port replacement, the design space includes two parts: (1) the choice of the first codebook, and (2) the choice of port replacement. Therefore, the two structures shown in the following table are provided (for example, "Structure A" and "Structure B").

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

Regarding structure A, starting from NR Rel-15 4Tx DL with L =1, in addition to (1234) used in the initial codebook, you can also use port replacement (1243), (1324), (1423) to obtain 128 codewords Expand codebook. The built codebook covers all codewords of Rel-15 4Tx DL codebook, Rel-8 4Tx codebook and Rel-10 UL 4Tx codebook. Regarding structure B, the first codebook can be designed based on the beam vector combination, and the expanded matrix can be based on the use of a replacement matrix. A total of 64 codewords can be stored in the expanded codebook. It can be verified that the design codebook can completely cover the Rel-8 DL 4Tx rank 2 codebook, Rel-10 4Tx UL rank 1 codebook rank 2 MUB extension and Rel-15 DL NR 4Tx rank 2 codebook.

表示為置換(1234)，

表示為置換(1243)，

表示為置換(1324)，

表示為置換(1423)。 For rank 2 in structure A, through the NR DL 4Tx codebook with L = 1, the following permutation matrix can be applied:

Expressed as replacement (1234),

Expressed as replacement (1243),

Expressed as replacement (1324),

Expressed as replacement (1423).

make

0

k

N ₁ O ₁-1

0

k

N ₁ O ₁ -1

Π _p W _k ⁽¹⁾ W _n ⁽²⁾生成128個秩2碼字，p=1、2、 3、4，0

k

N ₁ O ₁-1,n=1,2。 In addition, you can use

Π _p W _k ⁽¹⁾ W _n ⁽²⁾ generates 128 rank 2 codewords, p = 1, 2, 3, 4, 0

k

N ₁ O ₁ -1, n =1,2.

Π _p W _k ⁽¹⁾ W _n ⁽²⁾,0

k

N ₁ O ₁-1 For rank 2 in structure B. Let N ₁ =2, N ₂ =1 and O ₁ =4. You can use the following formula to generate 64 codewords:

Π _p W _k ⁽¹⁾ W _n ⁽²⁾ , 0

k

N ₁ O ₁ -1

Here, p = _P p is given by the 2:

The definition of W _k ^{(1) is} the same as in the NR DL 4Tx code book.

make

0

k

N ₁ O ₁-1。

0

k

N ₁ O ₁ -1.

Can provide the following two options of W _n ⁽²⁾ , the first option (Alt 1) and the second option (Alt 2): Alt 1

Alt 2

or

和

，因為他 們生成弦距等效碼字，其中一個就足夠了。此外，W _n ⁽²⁾不必同時包括

和

，因為他們生成弦距等效碼字。 It is worth noting that W _n ⁽²⁾ need not include both

with

, Because they generate equivalent codewords for chord spacing, one of them is sufficient. In addition, W _n ⁽²⁾ need not include both

with

, Because they generate equivalent codewords for chord spacing.

The aggregation of SRS resources and PMI can be used to indicate the bandwidth or subband precoder of the UL transmission. 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 codebook antenna ports can be assumed. In summary, it is assumed that a 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 to provide specification support for codebooks through port replacement, as described below.

According to the first method, when each SRS resource has a single port of SRS resource for the UL codebook, indicating to the UE the order in which the SRS resource is mapped to the codebook port, the first codebook (and no other version) is used for PMI The definition is sufficient. For example, a network node (eg, gNB) may indicate SRS resources 1, 2, 3, and 4 for PMI for signal notification. In one case, the network node signals SRS resources 1, 2, 3, and 4 to map to ports 1, 2, 3, and 4 (through SRI list signaling 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 ports 1, 2, 3 and 4 (through the signaling of the SRI list or the 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 of port replacement (1234) indication from SRI signaling. Figure 9 depicts an example scenario 900 of port replacement (1324) indication from SRI signaling.

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

According to the third method, when a single SRS resource with multiple ports is used for the UL codebook, the indication of SRS port replacement is necessary for PMI definition. For example, a network node (eg, gNB) may indicate that SRS resources with ports 1, 2, 3, and 4 are used for signaling PMI. In a design option, the network node signals (UE) the replacement of the SRS port (for example, (1,2,3,4) or (1,3,2,4)), and PMI can be used for the first code book. In another design option, the replacement of the SRS port can be integrated in the PMI definition, and PMI can be used for the second codebook.

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

Codebook subset limit

According to the solution proposed by the present invention, for UL codebook-based transmission with one SRS resource and a given number of SRS ports, TPMI and TPMI-related signaling overhead can be reduced. The various situations are as follows:

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

In the second case ("Case 2"), rank 2 transmissions are 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 the coherent group, there are two ways to select the rank 2 2Tx precoder (assuming the same structure as the 2Tx UL codebook).

In the third case ("Case 3"), even if it is completely coherent, AGI problems may occur. Therefore, the port selection can cover all four ports, instead of being limited to ports in the same coherent group as in Case 2. It is worth noting that when calculating the number of coding states, by discarding is already in case 3 The included precoder can avoid double counting. That is, (6 (total number of combinations in case 3)-2 (total number of combinations in case 2)) x2 (rank 2 number of 2Tx codebook precoders)=8.

In the fourth case ("Case 4"), one spatial layer transmission may come from coherent group 1, and the other spatial layer comes from coherent group 2. Therefore, precoders exceeding 2Tx can be used on each coherent group. According to the design of the 2Tx codebook, there may be 6 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 coherence, in the calculation below, if the Rel-8 4Tx codebook is used, there are 16 entries.

Overall, there are 66 coding states for 4Tx rank 2 transmission. When CSR is not applied, or even if it is applied but not reflected in DL signaling, then TPMI signaling requires ceil(log2(66))=7 bits. The following table summarizes the above five situations. In the table, "CAG" indicates a coherent antenna group, "4CAG" indicates incoherent, "1 CAG" indicates complete coherence, and "2CAG" indicates partial coherence, where ports 1 and 2 form a coherent group, and ports 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, 3 bits can be saved compared to the case where the fixed TPMI size is 7 bits. For a coherent group with AGI problems (for example, case 5 plus case 3), ceil(log2(16+8))=5 bits is required. Advantageously, it can save 2 bits compared to the case where the fixed TPMI size is 7 bits.

For case 5, in the case of using the above-mentioned dual-order codebook of the present invention instead of the Rel-8 4Tx codebook, the base station can select a useful codeword accordingly. As mentioned above, the proposed two-order codebook includes all codewords for ULA and non-ULA antenna configurations. The base station may use a group (for example, ULA codewords) to reduce signaling overhead. In this case, CSR can be a useful tool for coordinating certain conflicting design goals, 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. Considering the benefits provided by CSR, it is advantageous for the base station to have flexibility in deciding which codewords can be used for UL MIMO. Therefore, according to the proposed scheme, the base station can send the codebook subset limitation 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

Figure 11 depicts an example wireless communication environment 1100 according to an embodiment of the invention. The wireless communication environment 1100 relates to a communication device 1110 and a network device 1120 that perform wireless communication with each other. Either of the communication device 1110 and the network device 1120 can perform different functions of the implementation process, scheme, technology, process, and method of wireless communication based on codebooks described in this article. Yes, including the various processes, scenarios, solutions, solutions, and techniques described above, and the process 1200 described below. Therefore, the communication device 1110 is an exemplary embodiment of the UE 110 in the process 100, and the network device 1120 is an exemplary embodiment of the network node 120 in the 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 may be implemented as a smartphone, smart watch, personal digital assistant, digital camera, or computing device such as a tablet computer, laptop computer, or notebook computer. In addition, the communication device 1110 may also be a part of a machine type device, which may be an IoT or NB-IoT device, such as a fixed device, a home device, a wired communication device, or a computing device. For example, the communication device 1110 may 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 may 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 Multiple one or multiple reduced-instruction-set-computing (RISC) processors or complex-instruction-set-computing (CISC) processors.

The communication device 1110 includes at least a part of the components shown in FIG. 11, for example, the processor 1112. The communication device 1110 may also include one or more other components (eg, internal power supply, display device, and/or user interface device) that are not related to the solution proposed by the present invention. For the sake of brevity, the above-mentioned other components of the communication device 1110 are neither shown in FIG. 11 nor described below.

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

The network device 1120 includes at least a part of the components shown in FIG. 11, for example, the processor 1122. The network device 1120 may also include one or more other components (eg, internal power supply, display device, and/or user interface device) that are not related to the solution proposed by the present invention. For the sake of brevity, the above elements of the network device 1120 are neither shown in FIG. 11 nor described below.

In one aspect of the present invention, any one of the processor 1112 and the processor 1122 may be one or more single-core processors, one or more multi-core processors, one or more RISC processors, or one or more CISCs Realized in the form of a processor. That is, even if the singular term "processor" is used herein to refer to the processor 1112 and the processor 1122, in the present invention, any one of the processor 1112 and the processor 1122 may include plural ones in some embodiments The processor, in other embodiments, includes a single processor. On the other hand, any one of the processor 1112 and the processor 1122 may be implemented in the form of hardware (and optionally firmware) with electronic components, including, but not limited to, according to the present Invent 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 configured for a specific purpose Or one or more variable containers. In other words, at least in some embodiments of the invention, the processor 1112 and the processor 1122 are specific target machines that are specifically designed, arranged, and configured to perform codebook-based uplinks according to embodiments of the invention Transfer specific tasks.

In some embodiments, the communication device 1110 further includes a transceiver 1116 coupled to the 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 antenna ports (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, the network device 1120 further includes a transceiver 1126 coupled to the processor 1122 and capable of wirelessly transmitting and receiving data, signals, and information. In some In an embodiment, the network device 1120 further includes a memory 1124 coupled to the processor 1122 and capable of being accessed by the 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 help better understand, according to the background of the mobile communication environment, the following description of the operation, function, and capabilities of each of the communication device 1110 and the network device 1120 is provided. In the mobile communication environment, the communication device 1110 is communicating Implemented in the device or UE or as a communication device or UE, the network device 1120 is implemented in a network node (eg, gNB or TRP) of a communication network (eg, 5G/NR mobile network) or as a network of a communication network Node implementation.

In one aspect of the present invention, the processor 1112 of the communication device 1110 can construct a codebook including a plurality of precoders. In addition, the processor 1112 can use the codebook to process information. In addition, the processor 1112 may send the processed information to the network device 1120 via the transceiver 1116. In some embodiments, when building a codebook, the processor 1112 may select a candidate codebook from a single-order codebook or a dual-order codebook. And, the processor 1112 may perform permutation on the candidate precoder.

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

In some embodiments, when building a codebook, the processor 1112 may perform a plurality of operations. For example, the processor 1112 may select an initial codebook from a plurality of codebooks specified in the 3GPP specifications. In addition, the processor 1112 may 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, compared to the feedback cost of the initial codebook, the feedback cost of the codebook may remain unchanged.

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

In some embodiments, when selecting the replacement matrix, the processor 1112 may dynamically or semi-statically receive signaling from the network device 1120 indicating the selection of the replacement matrix used to construct the codebook.

In some embodiments, when receiving signaling, the processor 1112 may receive RRC signaling or MAC CE as part of the CSR or independent of the CSR.

In some embodiments, when selecting the permutation matrix, the processor 1112 may select the 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 corresponding one or more antenna layout scenarios or one or more codewords.

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

其中，

，r=0,1，l=0,1，以及 其中，c _r,l 表示表示共相位係數，其中，c _0,1=1、c _1,0=-c _1,1和c _1,0

{1,j}，(

,

)

{(0,0),(O ₁/2,0),(O ₁,0),(O ₁．3/2,0)}。 In some embodiments, the codebook may be a rank 2 codebook with the following structure:

among them,

, R =0,1, l =0,1, and c _r,l represents the common phase coefficient, where c _0,1 =1, c _1,0 =- c _1,1 and c _1,0

{1, j }, (

,

)

{(0,0),( O ₁ /2,0),( O ₁ ,0),( O ₁ .3/2,0)}.

,k=1,2,…,16矩陣： 1.八個矩陣

，k=1,…,8，來自

，

，

， 其中c=0,2，

=1,j，或者 2.八個矩陣C ₂ ^(k)，k=9,…,16，來自

，

，其中

=1,j,-1,-j，並且 可由下式給出秩2預編碼器：

n=0,1,2,3，k=1,2,…,16。 In some embodiments, when constructing the codebook, the processor 1112 may construct the codebook according to the above first structure: a plurality of

, k =1,2,...,16 matrix: 1. Eight matrices

, K =1,…,8, from

,

,

, Where c = 0, 2,

=1, j , or 2. Eight matrices C ₂ ^(k) , k =9,...,16, from

,

,among them

=1, j , -1,- j , and the rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16.

,k=1,2,…,16矩陣： In some embodiments, when constructing the codebook, the processor 1112 may construct the codebook according to the above second structure, which may be defined as a plurality of

, k =1,2,...,16 matrix:

，k=1,…,8，來自

，

，

， 其中c=0,2，

=1,j。 1. Eight matrices

, K =1,…,8, from

,

,

, Where c = 0, 2,

=1, j .

，k=9,…,16，來自

，

，其中

=1,j,-1,-j， 並且可由下式給出秩2預編碼器：

n=0,1,2,3,k=1,2,…,16。 2. Eight matrices

, K =9,...,16, from

,

,among them

=1, j , -1,- j , and the rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16.

，k=1,2,…,4矩陣： In some embodiments, when constructing the codebook, the processor 1112 may construct the codebook according to the above third structure, which may be defined as a plurality of

, K =1,2,...,4 matrix:

，k=1,2,…,4，來自

，

，

，其 中

=1,j，並且可由下式給出秩2預編碼器：

n=0,1,…,7，k=1,2,…,4，或

為來自

，

或

，

之八個矩陣之任一矩陣，其中

=1,j,-1,-j。 1. Four matrices

, K =1,2,...,4, from

,

,

,among them

=1, j , and the rank 2 precoder can be given by:

n =0,1,...,7, k =1,2,...,4, or

For

,

or

,

Any of the eight matrices, where

=1, j , -1,- j .

In some embodiments, when building a codebook, the processor 1112 may A replacement matrix is applied to the first codebook, and the codebook is constructed as an antenna port to re-index to expand the first codebook.

In some embodiments, the processor 1112 may receive signaling from the network device 1120 via the transceiver 1116, which indicates the order in which the plurality of SRS resources are mapped to the plurality of antenna ports at the communication device 1110 for uplink transmission . In some embodiments, a codebook may be used to configure each of the one or more antenna ports to be mapped to any SRS resource of the plurality of SRS resources for uplink transmission.

In some embodiments, the processor 1112 may receive signaling from the network device 1120 via the transceiver 1116, the signaling indication and the plurality of SRS resources are mapped to the plurality of antenna ports at the communication device 1110 for uplink transmission Replacement related to order. In some embodiments, a codebook may be used to fixedly map antenna ports to a plurality of SRS resources for uplink transmission.

In some embodiments, the signaling also includes PMI. In some embodiments, the replacement may be part of the PMI definition related to PMI.

In some embodiments, the processor 1112 may receive signaling from the network device 1120 via the transceiver 1116, the signaling indicating the CSR associated with the codebook. In addition, the processor 1112 may select one or more codewords in the codebook based on the CSR. In some embodiments, when sending processed information to the network device 1120, the processor 1112 may use one or more codewords to send the processed information to the network device 1120.

In some embodiments, when receiving the signaling indicating the CSR from the network device 1120, the processor 1112 may receive the CSR with the dot pattern through RRC signaling. In some embodiments, the length of the bitmap is equal to the number of precoders in the codebook.

Illustrative 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 related to the uplink transmission of codebooks in the wireless communication of the present invention. Process 1200 indicates One aspect of the feature realization of the communication device 1110. The process 1200 may include one or more operations, actions, or functions, as shown in one or more of steps 1210, 1220, 1230, and 1240. Although described as discrete steps, the various steps of process 1200 can be divided into additional steps, combined into fewer steps, or deleted as needed. In addition, the steps of the process 1200 may be executed in the order shown in FIG. 12, or in other orders, and one or more steps of the 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 to this, the process 1200 is described below in the context of the communication device 1110 serving as the UE and the network device 1120 serving as the network node of the wireless network (eg, gNB). Process 1200 begins at step 1210.

At step 1210, the process 1200 involves the processor 1112 of the 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 using the codebook to process information. Process 1200 proceeds from step 1220 to step 1230.

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

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

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

At substep 1214, process 1200 involves processor 1112 performing permutation on the candidate precoder.

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

In some embodiments, when building a codebook, the process 1200 involves the processor 1112 performing a plurality of operations. For example, the process 1200 involves the processor 1112 selecting an initial codebook from the 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, compared to the feedback cost of the initial codebook, the feedback cost of the codebook may remain unchanged.

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, the process 1200 involves the processor 1112 applying the replacement matrix to the candidate precoder to expand the candidate precoder.

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

In some embodiments, when 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 instructions that are part of the codebook.

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

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

其中，

，r=0,1，l=0,1，並且其中，c _r,l 表示共相位係數，其中，c _0,1=1、c _1,0=-c _1,1和c _1,0

{1,j}， (

,

)

{(0,0),(O ₁/2,0),(O ₁,0),(O ₁．3/2,0)}。 In some embodiments, the codebook may be a codebook having the following structure:

among them,

, R =0,1, l =0,1, and where c _r,l represents the common phase coefficient, where c _0,1 =1, c _1,0 =- c _1,1 and c _1,0

{1, j }, (

,

)

{(0,0),( O ₁ /2,0),( O ₁ ,0),( O ₁ .3/2,0)}.

,k=1,2,…,16矩陣： 3.八個矩陣

，k=1,…,8，來自

，

，

， 其中c=0,2,

=1,j，或者 4.八個矩陣C ₂ ^(k)，k=9,…,16，來自

，

，其中

=1,j,-1,-j，並且可由下式給出秩2預編碼器：

n=0,1,2,3，k=1,2,…,16。 In some embodiments, when constructing a codebook, the process 1200 involves the processor 1112 constructing a codebook according to the first structure described above: a plurality of

, k =1,2,...,16 matrix: 3. Eight matrices

, K =1,…,8, from

,

,

, Where c =0,2,

=1, j , or 4. Eight matrices C ₂ ^(k) , k = 9,..., 16, from

,

,among them

=1, j , -1,- j , and the rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16.

,k=1,2,…,16矩陣： 3.八個矩陣

，k=1,…,8，

，

，

，其 中c=0,2，

=1,j， 4.八個矩陣

，,k=9,…,16，來自

，

，其中

=1,j,-1,-j，並且可由下式給出秩2預編碼器：

n=0,1,2,3，k=1,2,…,16。 In some embodiments, when constructing a codebook, the process 1200 involves the processor 1112 constructing a codebook according to the above second structure, which may be defined as a plurality of

, k =1,2,...,16 matrix: 3. Eight matrices

, K =1,...,8,

,

,

, Where c =0,2,

=1, j , 4. Eight matrices

,, k =9,...,16, from

,

,among them

=1, j , -1,- j , and the rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16.

，k=1,2,…,4矩陣： In some embodiments, when constructing a codebook, the process 1200 involves the processor 1112 constructing a codebook according to the above third structure, which may be defined as a plurality of

, K =1,2,...,4 matrix:

，k=1,2,…,4，來自

，

，

，其 中

=1,j，並且可由下式給出秩2預編碼器：

n=0,1,…,7，k=1,2,…,4，或

為來自

，

之八個矩陣之任一矩陣，其中

=1,j,-1,-j。 2. Four matrices

, K =1,2,...,4, from

,

,

,among them

=1, j , and the rank 2 precoder can be given by:

n =0,1,...,7, k =1,2,...,4, or

For

,

Any of the eight matrices, where

=1, j , -1,- j .

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

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 antenna ports at the communication device 1110 for uplink The order of transmission. In some embodiments, a codebook may be used to configure each of the one or more antenna ports to be mapped to any SRS resource 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 instruction and the plurality of SRS resources are mapped to the plurality of antenna ports at the communication device 1110 for uplink Replacement related to the order of road transmission. In some embodiments, a codebook may be used to fixedly map antenna ports to a plurality of SRS resources for uplink transmission.

In some embodiments, the signaling also includes PMI. In some embodiments, the replacement may be part of the PMI definition related to PMI.

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

In some embodiments, when receiving signaling indicating the CSR from the network device 1120, the process 1200 involves the processor 1112 receiving 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.

Supplementary explanation

The subject matter described in this disclosure sometimes illustrates different elements included within or connected to different other elements. It is to be understood that these depicted architectures are merely examples, and in fact, many other architectures for implementing the same functions can be implemented. In a conceptual sense, any component arrangement used to achieve the same function is effectively "associated" so that the desired function is achieved. Therefore, any two components in the present invention that are combined to achieve a specific function may be considered to be "associated" with each other, so that the desired function is achieved regardless of the architecture or intermediate components. Likewise, any two elements so associated can also be considered "operably connected" or "operably coupled" to each other to achieve the desired function, and any two elements that can be so associated can also be viewed To "operably couple" to each other to achieve the desired function. Specific examples of operably coupled include, but are not limited to, physically pairable and/or physically interacting elements and/or wirelessly interactable and/or wirelessly interacting elements and/or logically interactive and/or logically interactable Of components.

In addition, with respect to the use of substantially any plural and/or singular terms in the present invention, those of ordinary skill in the art can convert the plural to singular and/or singular to plural to suit the context and/or application . For the sake of clarity, various singular/plural permutations can be explicitly stated in the present invention.

In addition, those with ordinary knowledge in the technical field should understand that, in general, the present invention is especially used in the scope of the accompanying patent application (for example, the subject of the scope of the accompanying patent application) The terminology is usually 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 "comprising" should be interpreted as " Including, but not limited to, etc. Those with ordinary knowledge in the technical field should also understand that if an intention is to cite a certain number of statements of patent application scope, then this intention will be clearly stated in the patent application scope, and in the absence of this statement, this intention does not exist. For example, to aid understanding, the following accompanying patent application scope may include the use of the introductory phrases "at least one" and "one or more" to introduce a patent application scope statement. However, the use of these phrases should not be interpreted as implying that the introduction of the patent scope statement through the indefinite article "one" or "one" will include any specific patent application scope that includes the patent application scope statement introduced here is limited to include only this one statement Embodiments, even when the scope of the patent application includes the introductory phrase "one or more" or "at least one" and indefinite articles such as "one" or "one", for example, "one" and/or "One" should be interpreted to mean "at least one" and "one or more", as is the use of the definite article used to introduce the statement of scope of the patent application. In addition, even if a specific number of stated patent application scope statements are explicitly stated, those with ordinary knowledge in the art will recognize that this statement should be interpreted to mean at least the stated amount, for example, a pure statement without other modifications "Two statements" means at least two statements or two or more statements. In addition, in those cases where a similar convention of "at least one of A, B, and C, etc." is used, generally, from the aspect that a person having ordinary knowledge in the art will understand the convention, this construction is expected, for example, " "A system with 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 Waiting for the system 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 a person having ordinary knowledge in the art will understand the convention, this construction is expected, for example, "have "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 And other systems. Those with ordinary knowledge in the technical field should also understand that it actually represents two or more alternatives. Any conjunctions and/or phrases pronouncing terms (whether in the specification, patent application, or drawings) should be understood to include the possibility of one of the terms, either 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 light of the above, it should be understood that various embodiments of the present invention have been described in the present invention for illustrative purposes, and that various modifications may be made without departing from the scope and spirit of the present invention. Therefore, the various embodiments disclosed in the present invention are not intended to be limiting, in which the true scope and spirit are indicated by the following patent application scope.

100: process

110: user equipment

120: network node

(1), (2), (2A), (2B), (2C), (3), (4), (5): steps

Claims (20)

A codebook-based uplink transmission method includes: a codebook including a plurality of precoders constructed by a processor of a user equipment; the processor uses the codebook to process information; and the processor Sending the processed information to a network node of a wireless network, wherein the construction of the codebook includes: selecting a candidate precoder from a single-level codebook or a dual-level codebook; and Perform a permutation on the precoder; where the construction of the codebook includes: selecting an initial codebook from the plurality of codebooks specified in the third-generation partner project specification; and by having one or more One or more permutations are performed on the initial codebook of the permutation matrix to expand the initial codebook to obtain the codebook. The codebook-based uplink transmission method as described in item 1 of the patent scope, wherein the execution of the permutation on the candidate precoder includes performing a plurality of permutations on the candidate precoder to construct the Codebook, and the plurality of replacements cover at least one of the plurality of mutually unbiased bases and the plurality of codebooks specified in the third-generation partner project specification. The uplink transmission method based on the codebook as described in item 1 of the patent scope, wherein the feedback overhead of one of the codebooks remains unchanged compared to the feedback overhead of one of the initial codebooks. The codebook-based uplink transmission method as described in item 1 of the patent scope, wherein the execution of the permutation on the candidate precoder includes: selecting a permutation matrix from a plurality of permutation matrices; and The selected permutation matrix is applied to the candidate precoder to expand the candidate precoder. As described in item 4 of the patent application scope, the uplink transmission method based on codebook, which In this, the selection of the permutation matrix includes receiving a signaling from the network node dynamically or semi-statically, the signaling indicating the selection of the permutation matrix used to construct the codebook. The codebook-based uplink transmission method as described in item 5 of the patent application scope, wherein the receiving of the signaling includes receiving as a part of the codebook subset limitation or independent of one of the codebook subset limitations Resource control signaling or a medium access control control element. The uplink transmission method based on a codebook as described in item 4 of the patent application range, wherein the selection of the permutation matrix includes selecting the permutation matrix based on an indication as an integral part of the codebook. The codebook-based uplink transmission method as described in item 4 of the patent application scope, wherein each of the plurality of permutation matrices corresponds to a corresponding one or more antenna layout scenarios or one or more codewords . The uplink transmission method based on codebook as described in item 1 of the patent application scope, wherein the candidate precoder includes a rank 2 precoder. The uplink transmission method based on the codebook as described in item 1 of the patent scope, wherein the codebook includes a rank 2 codebook having the following structure:

among them,

, R =0,1, l =0,1, and where c _r,l represents the common phase coefficient, where c _0,1 =1, c _1,0 =- c _1,1 and c _1,0

{1, j }, (

,

)

{(0,0),( O ₁ /2,0),( O ₁ ,0),( O ₁ .3/2,0)}. The uplink transmission method based on the codebook as described in item 1 of the patent application scope, wherein the construction of the codebook includes constructing the codebook according to the following structure: a plurality of

, k =1,2,...,16 matrix: eight matrices

, K =1,…,8, from

,

,

, Where c =0,2,

=1, j , or eight matrices C ₂ ^(k) , k =9,...,16, from

,

,among them,

=1, j , -1,- j , and a rank 2 precoder can be given by:

k =1,2,...,16, n =0,1,2,3. The uplink transmission method based on the codebook as described in item 1 of the patent application scope, wherein the construction of the codebook includes constructing the codebook according to the structure of the codebook defined by one of the following, a plurality of which can be defined as follows

, k =1,2,...,16 matrix: eight matrices

, K =1,…,8, from

,

,

, Where c =0,2,

=1, j . Eight matrices

, K =9,...,16, from

,

,among them,

=1, j , -1,- j , and a rank 2 precoder can be given by:

n =0,1,2,3, k =1,2,...,16. The uplink transmission method based on the codebook as described in item 1 of the patent scope, wherein the construction of the codebook includes constructing the codebook according to the structure of the codebook defined below, which can be defined as a plurality of

, K =1,2,...,4 matrix: four matrices

, K =1,2,...,4, from

,

,

,among them,

=1, j , and a rank 2 precoder can be given by:

n =0,1,...,7, k =1,2,...,4 or

For

,

or

,

Any of the eight matrices, where,

=1, j , -1,- j . The codebook-based uplink transmission method as described in item 1 of the patent application scope, wherein the construction of the codebook includes constructing the codebook as an antenna by applying a plurality of permutation matrices to a first codebook The port is reindexed to expand the first codebook. The codebook-based uplink transmission method as described in item 1 of the patent scope further includes: receiving, by the processor, signaling from the network node, the signaling indicating that a plurality of sounding reference signal resources are mapped to the use A plurality of antenna ports at the equipment to perform an uplink transmission sequence; wherein, the codebook is used to configure one or more of each antenna port to map any sounding reference signal resource to the sounding reference signal resource For this uplink transmission. The codebook-based uplink transmission method as described in item 1 of the patent scope further includes: receiving, by the processor, a signaling from the network node, the signaling instruction and a plurality of sounding reference signal resources are mapped to A plurality of antenna ports at the user equipment to perform a sequence-dependent permutation of an uplink transmission, wherein the codebook is used to permanently map the antenna ports to the plurality of sounding reference signal resources for the uplink Link transmission. The codebook-based uplink transmission method as described in item 16 of the patent scope, wherein the signaling further includes a precoding matrix indicator, and the permutation refers to the precoding matrix indicator The precoding matrix indicates a component of the definition. The uplink transmission method based on codebooks as described in item 1 of the patent application scope further includes: receiving, by the processor, a signaling from the network node, the signaling indicating a codebook related to the codebook Subset restriction; and the processor selects one or more codewords in the codebook based on the codebook subset restriction, wherein the sending of the processed information to the network node includes using the one or more Codewords send the processed information to the network node. The codebook-based uplink transmission method as described in item 18 of the patent scope, wherein the reception instruction of the signaling from the network node includes receiving the bitmap with a dot pattern through a radio resource control signaling The codebook subset limit is the codebook subset limit. The uplink transmission method based on the codebook as described in item 19 of the patent scope, wherein one length of the bitmap is equal to the number of precoders in the codebook.

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