WO2012022198A1

WO2012022198A1 - Method and system for transmitting uplink control information based on physical uplink shared channel transmissions

Info

Publication number: WO2012022198A1
Application number: PCT/CN2011/076318
Authority: WO
Inventors: 徐俊; 陈艺戬; 李儒岳; 张峻峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-08-16
Filing date: 2011-06-24
Publication date: 2012-02-23
Also published as: CN101924606B; CN101924606A

Abstract

A method and corresponding system for transmitting uplink control information based on Physical Uplink Shared CHannel (PUSCH) transmissions, which adopt spatial multiplexing, are disclosed. Two transport blocks configured by a user device both have uplink data to be transmitted, and two codeword streams are acquired after performing channel coding to the uplink data. The transmission method includes the following steps: a joint coding is performed by the user device to pre-coding matrix information in a first codebook and rank indicator information which are to be transmitted, and a joint coding index is acquired; modulation symbols acquired by processing the joint coding index are mapped, in a repeated manner by the user device, onto all the transport layers corresponding to the two codeword streams for transmitting.

Description

Method and system for transmitting uplink control information based on PUSCH transmission

Technical field

The present invention relates to the field of wireless communications, and in particular, to a method and system for transmitting uplink control information based on Physical Uplink Shared Channel (PUSCH) transmission. Background technique

In the Long Term Evolution (LTE) system, uplink control information that needs to be transmitted on the uplink has ACK/NACK: Acknowledgement/Negative Acknowledgement, and reflects downlink physical channel status information (CSI: Channel State Information). Three forms: CQI: Channels quality indication, Pre-coding Matrix Indicator (PMI) and Rank Indicator (RI: Rank Indicator).

In the LTE system, ACK/NACK information is on the physical uplink control channel (PUCCH: Physical

User Equipment ) When uplink data needs to be sent, it is transmitted on the PUSCH. The feedback of the CQI/PMI and the RI may be periodic feedback or non-periodic feedback. For CQI/PMI and RI of periodic feedback, if the UE does not need to send uplink data, the cyclic feedback CQI The /PML RI is transmitted on the PUCCH in the format 2/2a/2b (PUCCH format2/2a/2b). If the UE needs to transmit uplink data, the CQI/PMI and RI are transmitted on the PUSCH; for the non-periodic feedback CQI/ For PMI and RI, it is only transmitted on the PUSCH.

FIG. 1 is a schematic diagram showing an uplink control information and an uplink data multiplexing manner in an LTE system, and FIG. 2 shows a channel coding, multiplexing, and interleaving process of uplink control information and uplink data in an LTE system. The PUSCH is transmitted in the form of a single antenna, so the PUSCH only corresponds to one transport block. The uplink data is transmitted in the form of a transport block (TB: Transport Block), and the TB is subjected to cyclic redundancy check addition (CRC attachment), code block segmentation (Code block segmentation), and sub-block CRC attachment (Code block CRC attachment), and coding operation ( Coding ), rate matching, After code block concatenation and CQI/PMI, the uplink data and control information are multiplexed. Finally, the coded ACK/NACK information, RI information and data are multiplexed by channel interleaving to form a The codeword stream is then subjected to scrambling, modulation, and codeword stream to layer mapping to map the data and control information to each transport layer for transmission, and may also perform precoding (optional) and resource mapping to generate SC. -FDMA symbol processing.

The LTE-A (Long Term Evolution Advanced), which is an evolution standard of LTE, supports a larger transmission rate of the uplink, so the transmission of the PUSCH supports the form of spatial multiplexing. For the PUSCH transmitted in the spatial multiplexing form, the related art gives the mapping relationship of the codeword stream to the layer, which is the same as the mapping of the codeword stream to the layer in the downlink transmission of the LTE system, and the specific mapping relationship is shown in Table 1. Shown as follows:

Table 1 Mapping of PUSCH 空 Space Division Multiplexed Codewords to Layers in LTE-A System

In Table 1, , is the index of each layer of coded modulation symbols; represents the amount of data transmitted by each layer, s ⁽ ; i , M _sb respectively represent the number of coded modulation symbols on each codeword stream; respectively represent a codeword stream (°) _(/ ·) , . . . Χ ^ (0 represents the data transmitted on each layer. The Long Term Evolution Advanced (LTE-A) system, as an evolutionary standard for LTE, supports larger system bandwidths (up to 100 MHz) and is backward compatible with existing LTE standards. In order to improve the coverage and throughput of the cell edge, LTE-A supports up to 8 antennas and RI = 8 on the basis of the existing LTE system, and proposes some feedback enhancement techniques, mainly to enhance the codebook. Feedback accuracy, this technology can improve the spectrum utilization of the evolved International Mobile Telecommunications-Advance (IMT-Advance) system and alleviate the shortage of spectrum resources.

This technique can be described as:

1) The precoding/feedback structure of a subband consists of two matrices.

2) Each of the two matrices belongs to a separate codebook. The codebook is made up of base stations and

The UE knows in advance at the same time. Codebooks can vary at different times and on different subbands.

3) A matrix represents the properties of a wideband or long-term channel. Another matrix represents the properties of the determined frequency band or short-term channel.

4) The matrix codebook used is represented in the form of a finite number of matrix sets, and each matrix is known to the UE and the base station.

It can be seen from this that the feedback aspect of channel information proposes a structure based on double codebook, which can be further described as:

For one subband or multiple joint subbands that need to feed back channel information, the UE feeds back at least two pieces of PMI information to the terminal, namely PMI1 and PMI2, where PMI1 corresponds to a codebook (referred to as the first codebook in the text) in C1. The codeword (ie, the precoding matrix) W1, PMI2 corresponds to the codeword W2 in another codebook (referred to as the second codebook) C2. The base station has the same information of C1 and C2. After receiving PMI1 and PMI2, the corresponding code words W1 and W2 are found from the corresponding codebooks C1 and C2, and channel information is obtained according to the agreed function rule F (Wl, W2). , for example: Here, F ( W1 , W2 ) = W1 * W2 or W2 * W1.

Wherein, W1—determines the wideband channel state information, and W1 or W1 combined with the fixed value W2 can completely represent the current spatial channel state information; W2 can represent the channel state information of the subband, and can also represent the broadband channel state information, but W2 It cannot itself represent the current spatial channel state information independently, and it depends on W1. A more specific example is given below to illustrate the concepts of W1, W2 and so on.

Assume that the number of transmit antenna ports in the current downlink is 4.

For rank=l, 2, use the double codebook structure; for rank=3, 4, keep the single codebook using Release 8. For rank = 1, 2, one precoding matrix W is in the form of a product of two matrices W1 and W2 for one subband. Here, Wl e C1 and W2 e C2.

C _2j7 } is a 3-bit codebook, W2 is a 4x4 diagonal square matrix, also a matrix, and W2 is selected from C2.

k=4,5: C _2k = diag{\, 1, , a} a = \jk=6,7: C _2k =diag{ e ^ie Xe ^ie ) θ = -,—

' 8 8

Cl is the codebook of the transmit antenna rank=l or 2 in Release.8, and W1 is an NtxR matrix, selected from Cl.

For R=3, 4, for a precoding W is selected from the code base of the 4 transmit antenna rank=R of Release 8.

It can be found that in LTE-A, in the transmission mode supporting SU-MIMO/MU-MIMO, the channel information to be transmitted in the broadband/multi-subband channel information that needs feedback is RI, PMI1, PMI2 and CQI.

However, in the LTE-A system in which the PUSCH transmission uses the spatial multiplexing form, how uplink control information such as RI, W1, and W2 is transmitted on the transport layer of the PUSCH, and which codeword stream is selected for transmission, is also known in the prior art. No feasible solutions were proposed.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for transmitting uplink control information based on PUSCH transmission when the PUSCH transmission uses the spatial multiplexing form.

In order to solve the above technical problem, the present invention provides a method for transmitting uplink control information based on physical uplink shared channel (PUSCH) transmission. The PUSCH transmission uses spatial multiplexing, and both transport blocks configured by the user equipment have uplinks. Data transmission, channel coding of uplink data After obtaining two codeword streams, the sending method includes:

The user equipment jointly encodes the rank indication information to be sent and the information of the precoding matrix in the first codebook to obtain a joint coding index;

The user equipment transmits the modulation symbols obtained by the joint coding index processing to all transport layers corresponding to the two codeword streams in a repeated manner.

Preferably, the method further includes:

The modulation symbols obtained by processing the joint coding index constitute r repeated control information modulation symbol sequences of the joint coding index;

The user equipment maps the modulation symbols to all the transport layers corresponding to the two codeword streams in a repeated manner, by mapping the codewords to the layers, and sequentially modulating the r control information into the same position in the symbol sequence. The r modulation symbols are respectively mapped to the same resource locations of the r transport layers, r is the total number of layers of the transport layer corresponding to the two codeword streams, and r is a positive integer greater than or equal to 2.

Preferably,

The r repeated control information modulation symbol sequences of the joint coding index are obtained by the user equipment by the following processing:

Performing channel coding on the joint coding index, performing bit repetition, or performing bit coding and then performing channel coding to obtain r repeated control information codeword streams;

And multiplexing and controlling the rl pieces of the control information codeword stream and the codeword stream of the first transport block, and then performing scrambling and modulation to obtain a modulation symbol sequence including rl of the control information modulation symbol sequences; And multiplexing and interleaving the r2 pieces of the control information codeword stream and the codeword stream of the second transport block, and then performing scrambling and modulation to obtain another modulation symbol sequence including r2 pieces of the control information modulation symbol sequence ;

Where rl is the number of transmission layers corresponding to the codeword stream of the first transport block, r2 is the number of transport layers corresponding to the codeword stream of the second transport block, rl, r2 are positive integers greater than or equal to 1, r=rl +r2.

Preferably,

The uplink control information to be sent further includes a precoding matrix index in the second codebook; the user equipment uses the precoding matrix index and the channel quality indicator information in the second codebook After the source bits are cascaded, channel coding is performed, and the obtained control information codeword stream is multiplexed and interleaved with the selected codeword stream of a transport block, and then scrambled and modulated, and the obtained modulation symbol sequence is streamed to the layer through the codeword. The mapping is mapped to all transport layers corresponding to the selected codeword stream of the transport block.

Preferably,

The codeword stream of the selected one of the transport blocks is a codeword stream of one transport block having the largest transport block size, or a codeword stream of one transport block with the highest level of the modulation modulation format set.

Preferably,

The channel coding of the joint coding index is performed by linear block code coding.

Correspondingly, the present invention provides a transmission system for uplink control information based on Physical Uplink Shared Channel (PUSCH) transmission. The PUSCH transmission on the user equipment side is spatially multiplexed, and the uplink data forms two codeword streams. In the following application, the sending system includes:

a joint coding apparatus, configured to: jointly encode the rank indication information to be transmitted and the information of the precoding matrix in the first codebook to obtain a joint coding index;

a mapping pre-processing device, configured to: process the joint coding index, and the obtained modulation symbols form r repeated control information modulation symbol sequences of the joint coding index;

a mapping device, configured to: map the r control information modulation symbol sequences to the same resource locations of the r transmission layers corresponding to the two codeword streams by using a codeword to layer mapping; wherein, r The total number of layers of the transport layer corresponding to the two codeword streams, r is a positive integer greater than or equal to 2. Preferably, the pre-mapping processing device comprises:

The first sub-device is configured to: perform channel coding on the joint coding index, perform bit repetition, or perform channel coding after performing bit repetition to obtain r repeated control information codeword streams; and the second sub-device is set to: And multiplexing and interleaving the 154 pieces of the control information codeword stream with the codeword stream of the first transport block, and then performing scrambling and modulation to obtain a first modulation symbol sequence including rl of the control information modulation symbol sequence ; as well as

a third sub-device, configured to: multiplex and interleave r2 pieces of the control information codeword stream and the codeword stream of the second transport block, and then perform scrambling and modulation, to obtain r2 pieces of the control information modulation a second sequence of modulation symbols of the sequence of symbols; Where rl is the number of transmission layers corresponding to the codeword stream of the first transport block, r2 is the number of transport layers corresponding to the codeword stream of the second transport block, rl, r2 are positive integers greater than or equal to 1, r=rl +r2.

Preferably,

The transmitting system further includes a cascading and encoding device, and the cascading and encoding device is configured to: align the precoding matrix index in the second codebook to be transmitted with the channel quality indication information source bit, and perform channel coding to obtain a Control information code word stream;

The pre-mapping processing device is further configured to: multiplex and interleave the control information codeword stream output by the cascading and encoding device and the codeword stream of the selected one transport block, and then perform scrambling and modulation to obtain a third modulation. Symbol sequence

The mapping device is further configured to: map the third modulation symbol sequence to all transport layers corresponding to the selected codeword stream of the transport block by using a codeword stream to layer mapping.

In order to solve the above technical problem, the present invention further provides a method for transmitting uplink control information based on physical uplink shared channel (PUSCH) transmission, where the PUSCH transmission is in spatial multiplexing form, and two transmission blocks configured by the user equipment are provided. The uplink data transmission is performed by performing channel coding on the uplink data to obtain two codeword streams, where the sending method includes:

The user equipment separately performs channel coding on the precoding matrix index in the first codebook to be sent, or performs channel coding together with other uplink control information to be sent, to obtain a control information codeword stream;

The user equipment multiplexes and interleaves the control information codeword stream with the codeword stream of the selected one transport block, and then performs scrambling and modulation, and the obtained modulation symbol sequence is mapped to the layer through the codeword to the layer mapping. The codeword stream of the transport block is sent on all transport layers corresponding to it.

Preferably,

The user equipment performs channel coding by concatenating the precoding matrix index in the first codebook to be transmitted and the channel quality indication information source bit; or

The user equipment performs channel coding by concatenating the precoding matrix index in the first codebook to be transmitted with the precoding matrix index in the second codebook; or

The user equipment is a channel of the precoding matrix index in the first codebook to be transmitted, the precoding matrix index in the second codebook, and the channel quality indication information source bits are mutually concatenated code.

Preferably,

The precoding matrix index in the first codebook to be sent by the user equipment is separately channel coded, and the obtained control information codeword stream is cascaded with the control information codeword stream obtained by channel coding the channel quality indication information source bit, and then Multiplexing and interleaving with the codeword stream of the selected one of the transport blocks; or

The precoding matrix index in the first codebook to be sent by the user equipment is separately channel-coded, and the precoding matrix index and the channel quality indication information source bit in the second codebook to be transmitted are cascaded and channel coded together, and the channel coding is obtained. After the two control information codeword streams are cascaded, they are multiplexed and interleaved with the codeword stream of the selected one of the transport blocks.

Preferably,

The user equipment performs channel coding by concatenating the precoding matrix index in the first codebook to be transmitted with other uplink control information to be transmitted, using linear block code coding or tail biting convolutional code coding.

Correspondingly, the present invention further provides a transmission system for uplink control information based on physical uplink shared channel (PUSCH) transmission, in which PUSCH transmission on the user equipment side is spatially multiplexed, and uplink data forms two codeword streams. In the scenario, the sending system includes:

The channel coding apparatus is configured to: separately perform channel coding on the precoding matrix index in the first codebook to be transmitted, or perform channel coding together with other uplink control information to be sent, to obtain a control information codeword stream. ; as well as

a post-coding processing device, configured to: multiplex and interleave the control information codeword stream with a codeword stream of a selected one of the transport blocks, and then perform scrambling and modulation, and the obtained modulation symbol sequence flows through the codeword to The layer mapping is mapped to all transport layers corresponding to the selected codeword stream of the transport block.

Preferably,

The channel coding apparatus is configured to: perform channel coding by concatenating a precoding matrix index in a first codebook to be transmitted with a channel quality indication information source bit; or

The channel coding apparatus is configured to: perform channel coding by cascading a precoding matrix index in a first codebook to be transmitted and a precoding matrix index in a second codebook; or The channel coding apparatus is configured to perform channel coding by concatenating the precoding matrix index in the first codebook to be transmitted, the precoding matrix index in the second codebook, and the channel quality indication information source bits.

Preferably,

The channel coding apparatus is configured to: separately perform channel coding on a precoding matrix index in a first codebook to be transmitted, to obtain a first control information codeword stream; perform channel coding on a source quality indication information source bit to be transmitted, or And precoding the precoding matrix index and the channel quality indication information source bit in the second codebook to be transmitted, and performing channel coding to obtain a second control information codeword stream; the post-coding processing device is further configured to: After the first control information codeword stream and the second control information codeword stream are concatenated, the codeword stream of the selected one transport block is multiplexed and interleaved.

The embodiment of the present invention proposes a system for spatial multiplexing of PUSCH transmission. For example, in the LTE-A system, how is the index jointly encoded by RI and W1 transmitted on the transport layer of the PUSCH, and which codeword stream is selected to transmit CQI and W2. The scheme of indexing and other information effectively solves the problem of how to transmit uplink control information such as RI, Wl, W2, CQI in the spatial multiplexing form, and can obtain reliable performance. BRIEF abstract

1 is a schematic diagram of uplink control information and uplink data multiplexing in an LTE system;

2 is a schematic diagram of processing performed when uplink control information and uplink data are transmitted in an LTE system; FIG. 3 is a schematic diagram of uplink control information transmission processing according to Embodiment 1 of the present invention;

4 is a schematic diagram of uplink control information transmission processing according to Embodiment 2 of the present invention;

FIG. 5 is a schematic diagram of uplink control information transmission processing according to Embodiment 3 of the present invention; FIG.

FIG. 6 is a schematic diagram of mapping uplink control information to a transport layer according to Embodiment 1 of the present invention. Preferred embodiment of the invention

Specific embodiments of the present invention will be described in detail below with reference to the drawings and embodiments. The invention can For use in the LTE-A system, it can also be used in other PUSCH transmissions in the form of spatial multiplexing.

In the following method for transmitting uplink control information based on PUSCH transmission, the user equipment configures two transport blocks, each of which has uplink data transmission, and performs channel coding on the uplink data to obtain two codeword streams. It is assumed that the total number of layers of the transport layer corresponding to the two codeword streams is r, wherein the number of transport layers corresponding to the first codeword stream is rl, and the number of transport layers corresponding to the second codeword stream is r2, rl and r2 To be a positive integer greater than or equal to 1, r is a positive number greater than or equal to 2, r = rl + r2.

Embodiment 1

In this embodiment, the rank indication information (RI) and the precoding matrix W1 of the first codebook are jointly encoded (the joint coding belongs to the source coding).

Referring to FIG. 4 at the same time, the process of the method in this embodiment includes:

Step 1: The UE jointly encodes the rank indication information to be sent and the information of the precoding matrix in the first codebook to obtain a joint coding index.

The joint coding of RI and W1 is a unified coding of RI and W1. Each joint coding index uniquely indicates a precoding matrix in a first codebook, and different index intervals uniquely represent different values of RI, allowing a small number of coding indexes to be represented. default. The joint coding index of RI and W1 requires n bits to represent, and n is a positive integer greater than or equal to 1.

Table 2 below is an example of a joint encoding of RI and W1: Table 2 Examples of joint encoding of RI and W1

Among them, Mati represents the i-th 8*8 complex matrix, and 1 ₈ * ₈ represents the 8*8 unit matrix.

Step 2: The UE performs channel coding on the joint coding index, and then performs bit repetition to obtain r repeated control information codeword streams.

The channel coding for the joint coding index can be encoded by linear block code, and good performance can be achieved.

Step 3: multiplexing and interleaving the rl pieces of the control information codeword stream with the codeword stream of the first transport block, and then performing scrambling and modulation to obtain a first modulation symbol sequence; r2 pieces of the control information The codeword stream is multiplexed and interleaved with the codeword stream of the second transport block, and then scrambled and modulated to obtain a second modulation symbol sequence;

Obviously, the first modulation symbol sequence includes the control information modulation symbol sequence of the rl repeated joint coding index, and the second modulation symbol sequence includes the r2 repeated joint coding index control information modulation symbol sequences. Therefore, the modulation symbols of the joint coding index processed in this step constitute a control information modulation symbol sequence of r repeated (or the same) joint coding index, and each control information modulation symbol sequence contains complete information of the joint coding index.

Step 4: Perform codeword-to-layer mapping on the first modulation symbol sequence and the second modulation symbol sequence, and map the modulation symbols obtained by the joint coding index processing to all transmissions corresponding to the two codeword streams in a repeated manner. Layer (r) is sent.

Mapping the modulation symbols onto all transport layers corresponding to two codeword streams, by mapping the codeword streams to the layers, and mapping r control information modulation symbol sequences to r transmissions corresponding to the two codeword streams respectively The layers are transmitted at the same resource location such that each transport layer maps a sequence of control information modulation symbols on the same resource location. In an example, the mapping may be to sequentially map the r repeated modulation control information into the same position r modulation symbols in the symbol sequence, respectively, to r transmissions The same resource location on the layer, as shown in Figure 6.

Processing as described above can improve the reliability of important information RI and W1 transmissions and facilitate reception demodulation because the source bits of RI and W1 information are small and consume less resources.

If the uplink control information to be transmitted includes the information of the precoding matrix W2 in the second codebook C2, refer to FIG. 3, and the sending process is as follows:

Channel indexing is performed by cascading the W2 index and the CQI information source bit, and the obtained codeword is multiplexed and interleaved with the codeword stream of the selected one of the transport blocks, and then subjected to scrambling and modulation, and the obtained modulation symbol sequence is passed through the code. The word-to-layer mapping is mapped to all transport layers (rl or r2 transport layers) corresponding to the selected codeword stream of the transport block.

In one example, the codeword stream of the selected one of the transport blocks may be a codeword stream of one transport block having the largest transport block size (TBS), or a code of one transport block having the highest level of the coded modulation format set (MCS). Word stream. If the selected codeword stream of the transport block corresponds to a plurality of transport layers, modulation symbols including W2 and CQI information may be distributed to the plurality of transport layers for transmission.

Correspondingly, the embodiment further provides a transmission system for uplink control information based on physical uplink shared channel (PUSCH) transmission, where PUSCH transmission on the user equipment side is spatially multiplexed, and uplink data forms two codeword streams. Application in the scenario, the sending system includes:

a joint coding apparatus, configured to jointly encode the rank indication information to be transmitted and the information of the precoding matrix in the first codebook to obtain a joint coding index;

a mapping pre-processing device, configured to process the joint coding index, and the obtained modulation symbols form r repeated control information modulation symbol sequences of the joint coding index;

a mapping device, configured to map the r control information modulation symbol sequences to the same resource locations of the r transmission layers corresponding to the two codeword streams by using a codeword to layer mapping;

Where r is the total number of layers of the transport layer corresponding to the two codeword streams, and r is a positive integer greater than or equal to 2. Further, the pre-mapping processing device further includes:

a first sub-device, configured to perform channel coding on the joint coding index, and perform bit repetition to obtain r repeated control information codeword streams; a second sub-device, configured to multiplex and interleave rl of the control information codeword stream with the codeword stream of the first transport block, and then perform scrambling and modulation to obtain rl of the control information modulation symbols. a sequence of first modulation symbols of the sequence;

a third sub-device, configured to multiplex and interleave r2 pieces of the control information codeword stream and the codeword stream of the second transport block, and then perform scrambling and modulation to obtain r2 pieces of the control information modulation symbol a second sequence of modulation symbols of the sequence;

further,

The transmitting system further includes a cascading and encoding device, configured to concatenate the precoding matrix index in the second codebook to be transmitted and the channel quality indication information source bit, and perform channel coding to obtain a control information codeword stream;

The pre-mapping processing device is further configured to multiplex and interleave the control information codeword stream output by the cascading and encoding device and the codeword stream of the selected one transport block, and then perform scrambling and modulation to obtain a third modulation symbol. Sequence

The mapping device is further configured to transmit the third modulation symbol sequence to all transport layers corresponding to the selected codeword stream of the transport block by mapping the codeword stream to the layer.

Embodiment 2

This embodiment is basically the same as the first embodiment except that the position of the bit repetition is different. The bit repetition of the first embodiment occurs after the channel coding, and the bit repetition of the embodiment occurs before the channel coding, which is the information source. The bits are bit-repeated.

Referring to FIG. 4, the current total number of uplink layers is r, and the source bits of the joint coding index of RI and W1 are first bit-repeated to obtain r repeated joint coding indexes, and then r repeated joint coding indexes respectively The channel coding is performed to obtain r repeated control information codeword streams. For subsequent processing, see step 3 and step 4 of the first embodiment. When W2 is included in the PMI information, the processing at the time of W2 transmission is also the same as in the first embodiment.

The transmission system of this embodiment is basically the same as the transmission system of the first embodiment, except that the first sub-device in the pre-mapping processing device performs bit repetition on the joint coding index before performing channelization. Encoding gives r repeated control information codeword streams.

Embodiment 3

This embodiment does not jointly encode the rank indication information and the information of the precoding matrix W1 of the first codebook C1.

Referring to FIG. 5 simultaneously, the process of the method in this embodiment includes:

Step 1: The index of the precoding matrix W1 in the n1 first codebooks to be transmitted, the index of the precoding matrix W2 in the n2 second codebooks, and the n3 CQI information source bits are concatenated, and then channel coding is performed. A control information codeword stream, wherein nl is a positive integer greater than or equal to 1, and η2 and η3 are integers greater than or equal to zero.

When η2=0, the index of W1 to be transmitted is only concatenated with the CQI information source bit; when η3=0, the index of W1 to be transmitted is only cascaded with the index of W2. The index of W1, the index of W2, and CQI information can all be sent.

The cascading order between the W1, W2, and CQI information can be any way.

Step 2: multiplexing and interleaving the control information codeword stream with the codeword stream of the selected one of the transport blocks, and then scrambling and modulating, the obtained modulation symbol sequence is mapped to the layer by the codeword stream, and mapped to The selected code block of the transport block is sent on all transport layers corresponding to the transport stream.

When selecting the codeword stream of the transport block, the codeword stream of one transport block with a larger transport block size (TBS) may be selected, or the codeword stream of one transport block with the highest coding modulation format set (MCS) level may be selected. The invention is not limited.

Correspondingly, the embodiment provides a transmission system for uplink control information based on physical uplink shared channel (PUSCH) transmission, where PUSCH transmission on the user equipment side is spatially multiplexed, and uplink data forms two codeword streams. In the scenario, the sending system includes:

a channel coding apparatus, configured to perform channel coding by concatenating a precoding matrix index in a first codebook to be transmitted with other uplink control information to be transmitted, to obtain a control information codeword stream; The control information codeword stream is multiplexed and interleaved with the codeword stream of the selected one transport block, and then scrambled and modulated, and the obtained modulation symbol sequence is mapped to the selected layer by the codeword stream to the selected one. The transport word block is transmitted on all transport layers corresponding to the codeword stream.

further, The channel coding apparatus performs channel coding by concatenating a precoding matrix index in a first codebook to be transmitted with a channel quality indication information source bit; or

The channel coding apparatus performs channel coding by concatenating a precoding matrix index in a first codebook to be transmitted with a precoding matrix index in a second codebook; or

The channel coding apparatus performs channel coding by cascading the precoding matrix index in the first codebook to be transmitted, the precoding matrix index in the second codebook, and the channel quality indication information source bits.

Embodiment 4

This embodiment does not jointly encode the rank indication information (RI) and the index of the precoding matrix W1 of the first codebook.

The flow of the sending method of this embodiment includes

Step 1: categorize the index of the precoding matrix W2 and the CQI information source bit in the second codebook to be transmitted, and then perform channel coding on the concatenated source control information bits to obtain a first control information codeword stream. The index of the precoding matrix W1 in the first codebook sent is channel coded to obtain a second control information codeword stream;

There may be one or more Wl, W2, and CQI messages to be sent.

Step 2, the first control information codeword stream and the second control information codeword stream are cascaded, and the cascaded control information codeword stream is multiplexed and interleaved with the selected one of the transport block codeword streams, and then performed. The scrambling and modulation are performed, and the obtained modulation symbol sequence is transmitted through the mapping of the codeword stream to the layer, and is mapped to all the transport layers corresponding to the selected codeword stream of the transport block.

In another embodiment, the W2 is not required to be sent. In this case, the second control information codeword stream obtained by separately encoding the W1 may be cascaded with the first control information codeword stream obtained by encoding the CQI information source bit, and then The cascaded control information codeword stream is multiplexed and interleaved with the selected codeword stream of one transport block, and the subsequent processing is the same as in the fourth embodiment.

Correspondingly, the system for transmitting the uplink control information based on the physical uplink shared channel (PUSCH) transmission provided by the embodiment is in the form of spatial multiplexing of the PUSCH transmission on the user equipment side, and the uplink data is formed in the scenario of two codeword streams. Application, the sending system includes:

a channel coding apparatus, configured to separately perform precoding matrix index in the first codebook to be sent Channel coding, obtaining a first control information codeword stream; channel coding the source quality indication information source bit to be transmitted, or cascading the precoding matrix index and the channel quality indication information source bit in the second codebook to be transmitted together Performing channel coding to obtain a second control information codeword stream;

a post-coding processing device, configured to cascade the first control information codeword stream and the second control information codeword stream, and then multiplex and interleave with the codeword stream of the selected one transport block, and then perform The scrambling and modulation are performed, and the obtained modulation symbol sequence is transmitted through the mapping of the codeword stream to the layer, and is mapped to all the transport layers corresponding to the selected codeword stream of the transport block.

In the above embodiments, the coding of the concatenated information may be linear block code coding, tail biting convolutional code coding or the like.

The embodiments of the present invention can ensure normal transmission of uplink control information. The size of the overhead is different in each example, which is the result of the same offset value configuration. As the offset values of the example configurations are different, the overhead will vary.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The embodiment of the present invention proposes a system for spatial multiplexing of PUSCH transmission. For example, in the LTE-A system, how is the index jointly encoded by RI and W1 transmitted on the transport layer of the PUSCH, and which codeword stream is selected to transmit CQI and W2. The scheme of indexing and other information effectively solves the problem of how to transmit uplink control information such as RI, Wl, W2, CQI in the spatial multiplexing form, and can obtain reliable performance.

Claims

Claim

A method for transmitting uplink control information based on physical uplink shared channel (PUSCH) transmission, wherein the PUSCH transmission uses spatial multiplexing, and two transmission blocks configured by the user equipment have uplink data transmission, and perform channel for uplink data. After the encoding, two codeword streams are obtained, where the sending method includes: the user equipment jointly encodes the rank indication information to be sent and the information of the precoding matrix in the first codebook to obtain a joint coding index;

2. The transmitting method according to claim 1, wherein the method further comprises:

The transmission method according to claim 2, wherein the r-modulated control information modulation symbol sequence of the joint coding index is obtained by the user equipment by the following processing:

4. The transmitting method according to claim 1, wherein The uplink control information to be sent further includes a precoding matrix index in the second codebook; the user equipment aligns the precoding matrix index in the second codebook with the channel quality indication information source bit to perform channel Encoding, the obtained control information codeword stream is multiplexed and interleaved with the selected codeword stream of a transport block, and then scrambled and modulated, and the obtained modulation symbol sequence is mapped to the layer by the codeword stream to the selected layer. The transport word block is transmitted on all transport layers corresponding to the codeword stream.

5. The transmitting method according to claim 4, wherein

The transmission method according to claim 3 or 4, wherein the coding of the joint coding index is performed by linear block code coding.

7. A method for transmitting uplink control information based on physical uplink shared channel (PUSCH) transmission, wherein the PUSCH transmission uses spatial multiplexing, and two transmission blocks configured by the user equipment have uplink data transmission, and perform channel for uplink data. After the encoding, the two codeword streams are obtained. The sending method includes: the user equipment separately performs channel coding on the precoding matrix index in the first codebook to be sent, or performs channelization together with other uplink control information to be sent. Encoding to obtain a control information codeword stream;

8. The transmitting method according to claim 7, wherein

The user equipment performs channel coding by cascading the precoding matrix index in the first codebook to be transmitted, the precoding matrix index in the second codebook, and the channel quality indication information source bits.

9. The transmitting method according to claim 7, wherein The precoding matrix index in the first codebook to be sent by the user equipment is separately channel coded, and the obtained control information codeword stream is cascaded with the control information codeword stream obtained by channel coding the channel quality indication information source bit, and then Multiplexing and interleaving with the codeword stream of the selected one of the transport blocks; or

10. The transmitting method according to claim 7 or 8, wherein

11. A system for transmitting uplink control information based on physical uplink shared channel (PUSCH), where the PUSCH transmission on the user equipment side is in a spatial multiplexing manner, and the uplink data is used in a scenario of forming two codeword streams, The sending system includes:

a mapping device, configured to: map the r control information modulation symbol sequences to the same resource locations of the r transmission layers corresponding to the two codeword streams by using a codeword to layer mapping; wherein, r The total number of layers of the transport layer corresponding to the two codeword streams, r is a positive integer greater than or equal to 2.

The transmitting system according to claim 11, wherein the pre-mapping processing device comprises: a first sub-device, configured to: perform channel coding on the joint coding index, perform bit repetition, or perform bit repetition before performing Channel coding, obtaining r repeated control information codeword streams; the second sub-device is configured to: multiplex and interleave rl of the control information codeword streams with the codeword stream of the first transport block, and then perform Scrambling and modulating, resulting in a first modulation symbol sequence comprising rl of said control information modulation symbol sequences; a third sub-device, configured to: multiplex and interleave r2 pieces of the control information codeword stream and the codeword stream of the second transport block, and then perform scrambling and modulation, to obtain r2 pieces of the control information modulation a second sequence of modulation symbols of the sequence of symbols;

13. The transmission system according to claim 11 or 12, wherein

The system further includes a cascading and encoding device, and the cascading and encoding device is configured to: align the precoding matrix index in the second codebook to be transmitted with the channel quality indication information source bit, and perform channel coding to obtain a control information code word stream;

A transmitting system for transmitting uplink control information based on a physical uplink shared channel (PUSCH), where the PUSCH transmission on the user equipment side is in a spatial multiplexing manner, and the uplink data is formed in a scenario of forming two codeword streams, The sending system includes:

15. The transmitting system according to claim 14, wherein

16. The transmitting method according to claim 14, wherein