WO2012106994A1

WO2012106994A1 - Method, device, and system for transmitting coordinated control information and transmitting data

Info

Publication number: WO2012106994A1
Application number: PCT/CN2012/071009
Authority: WO
Inventors: 潘成康; 刘建军; 王启星; 刘光毅
Original assignee: 中国移动通信集团公司
Priority date: 2011-02-12
Filing date: 2012-02-10
Publication date: 2012-08-16
Also published as: CN102638295A

Abstract

A method, device, and system for transmitting coordinated control information and for transmitting data, comprising: determining, prior to transmitting data to a user equipment (UE), the coordinated control information required for processing and transmitting the data; transmitting the coordinated control information to each coordinated cell performing downlink coordinated multipoint transmission of the data. The invention also comprises: each coordinated cell receiving the coordinated control information; processing, on the basis of the coordinated control information, the data requiring downlink coordinated multipoint transmission; and using a physical resource indicated by the coordinated control information for transmitting the processed data to the UE. Employment of the solution provided in embodiments of the present invention allows for distribution among the coordinated cells of a control parameter required to process the data, and allows for transparent downlink multipoint transmission of the data.

Description

Cooperative control information transmission, data transmission method, device and system The present application claims to be submitted to the Chinese Patent Office on February 12, 2011, and the application number is 201110036846.7. The invention titled "cooperative control information transmission, data transmission method, device and system" Priority of the patent application, the entire contents of which is incorporated herein by reference.

Technical field

The present invention relates to a downlink coordinated multi-point (CoMP) transmission technology in the field of wireless communication technologies, and in particular, to a cooperative control information transmission, data transmission method, apparatus and system.

Background technique

Downlink CoMP transmission is one of the future enhancements of Long Term Evolution (LTE), and joint transmission is an important implementation of downlink CoMP transmission. In the joint transmission scheme, multiple coordinated cells (including serving cells) jointly encode data of user equipments (UEs) under the jurisdiction of the serving cell, and then transmit them on the same physical time-frequency resource block. In order to be compatible with the existing or in-progress specifications of the LTE, in the downlink CoMP transmission process, the additional data is not added to notify the UE that the currently transmitted data is in the CoMP transmission state, and the UE will receive the data according to the non-CoMP scheme, that is, from the UE side. It can be seen that the CoMP transmission of multiple coordinated cells is equivalent to single-cell non-CoMP transmission, which is a transparent transmission mode. Transparent transmission eliminates the need for standardization of UEs and does not require improvements to existing UEs. To achieve transparent transmission, the following two conditions are required:

All collaborative cells (including serving cells) share data;

All cooperating cells (including serving cells) perform the same processing on the data.

Before the data is sent to the UE, a series of processing operations are required on the data to be sent. For example, the processing operations that need to be performed are clearly defined in the existing Rel. 8/9/10 specification, including: channel coding, plus Disturbance, modulation, generation of demodulation reference signals DM-RS, precoding and physical resource mapping; corresponding control parameters are required for this series of processing operations, for example, in the Rel. 8/9/10 specification for these processing operations Corresponding control parameters, such as the number of codewords, the modulation coding scheme MCS for each codeword channel modulation and coding, the precoding coefficients for precoding, and the resource allocation scheme for physical resource mapping (including resources) are defined. Allocation type, number and resource location), relevant parameters for scrambling sequence generation, and related parameters for DM-RS sequence generation. In order to achieve transparent transmission, all cooperating cells must be aware of these control parameters in order to perform the same processing operations on the data to be transmitted. However, there is no clear method in the prior art to implement the distribution and interaction of the foregoing control parameters between the cooperative cells, and thus the downlink coordinated multi-point transparent transmission of the data to be transmitted cannot be realized.

Summary of the invention

The embodiments of the present invention provide a cooperative control information transmission, data transmission method, apparatus, and system, which are used to implement distribution of control parameters required for processing data transmitted to a UE between coordinated cells.

An embodiment of the present invention provides a method for transmitting cooperative control information, including:

Determining cooperative control information required for processing and transmitting the data before transmitting the data to the user equipment UE;

The cooperative control information is transmitted to each coordinated cell that performs downlink coordinated multipoint transmission on the data.

The embodiment of the invention further provides a data sending method, including:

Each coordinated cell performing downlink coordinated multipoint transmission receives cooperative control information; and

And processing, according to the cooperation control information, data that needs to perform downlink coordinated multi-point transmission; and transmitting, by using the physical resource indicated by the cooperation control information, the processed data to the user equipment UE.

An embodiment of the present invention further provides a cooperative control information sending apparatus, including:

a determining unit, configured to determine, after sending data to the user equipment UE, cooperative control information required for processing and transmitting the data;

The first sending unit is configured to send the cooperation control information to each coordinated cell that performs downlink coordinated multipoint transmission on the data.

An embodiment of the present invention further provides a data sending apparatus in a coordinated cell, including:

a receiving unit, configured to receive cooperative control information;

a processing unit, configured to process, according to the collaboration control information, data that needs to perform downlink coordinated multipoint transmission; The second sending unit is configured to send the processed data to the user equipment UE by using the physical resource indicated by the cooperation control information.

An embodiment of the present invention further provides a data sending system, including: a cooperative control information sending apparatus, and a data sending apparatus in each coordinated cell that performs downlink coordinated multipoint transmission, where:

The cooperative control information transmitting apparatus is configured to determine, after transmitting data to the user equipment UE, cooperative control information required for processing and transmitting the data; and send the cooperation control information to the collaboration Community

And the data sending apparatus is configured to receive the collaboration control information, and process, according to the collaboration control information, data that needs to perform downlink coordinated multipoint transmission; and use the physical resource indicated by the collaboration control information, The UE transmits the processed data.

In the method provided by the embodiment of the present invention, before transmitting data to the UE, first determining cooperative control information required for processing and transmitting data, and transmitting the determined cooperation control information to downlink cooperation on the data. Each coordinated cell of the point transmission realizes distribution of control parameters required for processing the data between the coordinated cells; and after receiving the cooperation control information, each coordinated cell processes the data according to the coordinated control information. Obtaining the processed data, and transmitting the processed data to the UE by using the physical resource indicated by the cooperation control information, so that all the coordinated cells perform the same processing on the data, and the processed data is sent to the UE, thereby implementing Transparent transmission of multiple points of downlink cooperation of data.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention and the prior art, the following description of the embodiments and the drawings used in the prior art will be briefly described. It is obvious that the drawings in the following description are only Some embodiments of the invention may also be used to obtain other figures from these figures without departing from the art.

1 is a flowchart of a method for transmitting cooperative control information according to an embodiment of the present invention;

2 is a flowchart of a data sending method according to an embodiment of the present invention;

3 is a flowchart of a method for transmitting cooperative control information according to Embodiment 1 of the present invention;

4 is a flowchart of a data sending method according to Embodiment 2 of the present invention; FIG. 5 is a flowchart of a data sending method according to Embodiment 3 of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a device for transmitting cooperative control information according to Embodiment 4 of the present invention; FIG. 7 is a schematic structural diagram of a data transmitting device in a coordinated cell according to Embodiment 5 of the present invention; Schematic diagram of the structure of the data transmission system.

detailed description

The present invention will be further described in detail below with reference to the drawings and embodiments. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to provide a scheme for realizing the processing of the control parameters required for processing the data sent to the UE, and the transparent transmission of the downlink cooperation of the data, the embodiment of the present invention provides a cooperative control. The preferred embodiments of the present invention are described with reference to the accompanying drawings, and the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not intended to limit the present invention. . And in the case of no conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.

An embodiment of the present invention provides a method for transmitting cooperative control information. As shown in FIG. 1, the method includes: Step S101: Before transmitting data to a user equipment UE, determine cooperative control information required for processing and transmitting data.

Step S102: Send the cooperative control information to each coordinated cell that performs downlink coordinated multipoint transmission on the data.

The embodiment of the present invention further provides a data sending method. As shown in FIG. 2, the method includes: Step S201: Each coordinated cell that performs downlink coordinated multipoint transmission receives cooperative control information. Step S202: Process data that needs to perform downlink coordinated multipoint transmission according to the cooperation control information.

Step S203: Send the processed number to the UE by using the physical resource indicated by the cooperation control information. According to.

The method and apparatus and corresponding systems provided by the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

In the non-CoMP transmission mode of LTE, only the serving cell of the UE performs channel coding, scrambling, modulation, generation DM-RS, precoding, and physical resource mapping processing operations on data that needs to be sent to the UE, and related control parameters are also The serving cell is determined. Therefore, in the embodiment of the present invention, a logical control entity CoMP processing apparatus is provided, which is used to determine the foregoing protocol control information and send it to each coordinated cell, and may be integrated into a serving cell for performing the foregoing cooperative control information sending method. That is, each relevant control parameter is determined and sent to other coordinated cells, but this will occupy a large amount of computing resources of the serving cell and reduce the performance of the serving cell. Therefore, the CoMP processing device may also be integrated into one cell in each coordinated cell. , or not integrated in any of the coordinated cells, but independently set up for downlink coordinated multi-point transmission of data for each coordinated cell.

In the following, the cooperative control information sending method is described in detail by taking the CoMP processing device as an example. As shown in FIG. 3, the method includes:

In step S301, in the first embodiment, the control information specifically included in the cooperation control information is taken as an example of the control information required for processing the data. When the data to be processed is the source data, the cooperation control information may include : scrambling indication information, modulation and coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information;

When the data to be processed is the data subjected to the scrambling process on the source data, the cooperative control information of the serving cell that is sent to the UE includes: modulation and coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation. The scheme indication information; the cooperation control information that is sent to each of the coordinated cells except the serving cell may include: modulation scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information.

The scrambling indication information is used to scramble the data, and the modulation and coding scheme indication information is used to The data is encoded and modulated, the DM-RS sequence indication information is used to generate a DM-RS sequence, the precoding indication information is used to precode the data and the DM-RS sequence, and the resource allocation scheme indication information is used to indicate the transmission data and the DM- The physical resource of the RS sequence.

Further, the scrambling indication information specifically includes: q-value information corresponding to the codeword 0 or 1; the modulation and coding scheme indication information includes: modulation coding mode indication information and a transport block-to-codeword mapping identifier;

The modulation scheme indication information includes: modulation mode indication information and a transport block to codeword mapping identifier; the DM-RS sequence indication information includes: a DM-RS sequence scrambling ID;

The precoding indication information includes: a precoding coefficient;

The resource allocation scheme indication information includes: a resource allocation type identifier and a resource frequency domain location information. Moreover, when the resource time domain location information (such as the slot number) required for processing the data is a designated time slot in the fixed radio frame, the foregoing cooperation control information may not include the resource time domain location information, but when the resource When the time domain location information is not a specified time slot in a fixed radio frame, the foregoing cooperative control information further includes resource time domain location information, that is, corresponding, scrambling indication information, DM-RS sequence indication information, and resource allocation scheme. The indication information also includes resource time domain location information.

For the different coordinated cells, in the control information required for processing the data, the scrambling indication information, the modulation and coding scheme indication information, the demodulation reference signal DM-RS sequence indication information, and the resource allocation scheme indication information are all the same. Only the precoding indication information is different for different coordinated cells.

Therefore, the precoding coefficient in the foregoing cooperative control information may be in the following two manners: The first mode includes: a precoding coefficient corresponding to each coordinated cell, and the coordinated cell may obtain the corresponding correspondence from the cooperative control information. Precoding coefficient

The second mode is different for the coordinated control information sent by the different coordinated cells. The difference is that the precoding coefficients are different, that is, the cooperative control information includes only the precoding coefficients corresponding to the coordinated cells that receive the cooperative control information. In the first embodiment, the CoMP processing apparatus receives the parameter information for determining the cooperation control information that is sent by each coordinated cell, and the control information specifically included in the cooperation control information is determined. , are described as follows:

q value information corresponding to codeword 0 or 1: When the transmitted data is transmitted using only one transport block, only one codeword channel (codeword 0 channel) is used to encode and modulate it, when the transmitted data needs to use two When a transport block is transmitted, in addition to the codeword 0 channel, another codeword channel (codeword 1 channel) is used to encode and modulate it, and the q value corresponding to the codeword 0 channel is 0, and the codeword 1 The q value corresponding to the channel is 1.

Therefore, in the first embodiment, the number information of the transport block used for transmitting data may be sent by the serving cell to the CoMP processing apparatus, or the determined q value information may be directly sent to the CoMP processing apparatus after determining the q value information. .

Modulation coding mode or modulation mode: When determining the modulation coding mode or the modulation mode, the channel state information of each coordinated cell needs to be considered, so the required parameter information is sent by each coordinated cell to the CoMP processing device, and the CoMP processing device is based on the The parameter information received by each coordinated cell is determined by using a set determination algorithm.

Transport block to codeword mapping identification: When transmitting data using only one transport block, the transport block is mapped with codeword 0, which characterizes the encoding and modulation of the data of the transport block using the codeword 0 channel, when using two transmissions When the block transmits data, the two transport blocks are respectively mapped with the code words 0 and 1, that is, the data of the transport block mapped with the code word 0 and 1 channel is encoded and modulated, and the transport block can be determined by the serving cell. After the codeword mapping result, the transport block to the codeword mapping identifier representing the mapping result is directly sent to the CoMP processing device; the parameter information required to determine the mapping result may also be sent to the CoMP processing device, and determined by the CoMP processing device.

DM-RS Sequence Scrambling ID: is the sequence scrambling ID associated with the PDSCH channel transmission, which may take a value of 0 or 1. This information can be determined by the serving cell and sent directly to the CoMP processing device.

Resource allocation scheme indication information: resource allocation class included in the resource allocation scheme indication information The type identifier, the resource frequency domain location information, and the resource time domain location information need to refer to the current resource usage of each coordinated cell when determining. Therefore, each coordinated cell needs to send its own resource usage information to the CoMP processing device, by CoMP. The processing device determines according to the set scheduling algorithm.

Precoding coefficient: Since the precoding coefficients used by different cooperating cells are different, each cooperating cell needs to transmit its own parameter information required for determining the precoding coefficient to the CoMP processing device, for example, each coordinated cell is processed to CoMP. The device reports the channel state information required to determine the precoding coefficient, and the channel state information may be that the UE feeds back to the coordinated cell, or may be estimated by the coordinated cell according to the UE uplink sounding pilot signal.

Step S302: After receiving the parameter information for determining the cooperation control information sent by each coordinated cell, the CoMP processing device determines the cooperation control information according to the received parameter information, and the control information specifically included in the cooperation control information and the foregoing steps. The related parameter information received in S301 is described as follows:

The q value information corresponding to the codeword 0 or 1: when receiving the quantity information of the transport block used by the transmission data sent by the serving cell, determining the used codeword channel according to the quantity information of the transport block, and determining the codeword channel The q value corresponding to the 0 channel is 0, and the q value corresponding to the code channel 1 channel is 1;

When the q-value information sent by the serving cell is received, it can be directly obtained.

Modulation coding mode or modulation mode: receiving parameter information required for determining a modulation coding mode or a modulation mode transmitted by each coordinated cell, and determining according to the set determination algorithm.

The transport block to codeword mapping identifier: when receiving the parameter information required by the serving cell to determine the transport block to codeword mapping result, the CoMP processing device determines the mapping result according to the setting algorithm, and further determines the mapping identifier;

When the received transport block to the codeword mapping identifier sent by the serving cell is used, the direct acquisition may be performed.

DM-RS sequence scrambling ID: It can be obtained from the message carrying the DM-RS sequence scrambling ID sent by the receiving serving cell. The resource allocation scheme indication information is determined according to the resource usage information of each coordinated cell by using a set scheduling algorithm.

Precoding coefficient: According to the parameter information required for determining the precoding coefficient reported by each coordinated cell, such as channel state information, the setting algorithm is used for determining.

In the first embodiment, various algorithms in the prior art may be used for the specific algorithm for determining the control information according to the received parameter information, and detailed descriptions are not provided herein.

Step S303: After determining the cooperation control information, the CoMP processing device sends the cooperation control information to each coordinated cell.

Based on the control information specifically included in the foregoing collaboration control information, the embodiment of the present invention provides a message format carrying the collaboration control information, which is specifically as follows:

The first message format is: when the processed data is the source data, the protocol control information sent to each coordinated cell is the same, and the message format carrying the cooperative control information includes:

a modulation coding mode subfield: configured to carry modulation coding mode indication information; and, the modulation coding mode subfield includes: a modulation coding mode subfield corresponding to codeword 0 and a modulation coding mode subfield corresponding to codeword 1, respectively corresponding to a modulation coding scheme used by the codeword 0 channel to encode and modulate data, and a modulation coding scheme used by the codeword 1 channel to encode and modulate data;

Moreover, since the use of the codewords 0 and 1 is related to the q value information, that is, the q values corresponding to the codeword 0 channel and the codeword 1 channel respectively are 0 and 1, the codeword 0 and the codeword 1 can be used. The modulation coding mode subfield characterizes the q value information corresponding to the codeword 0 or 1. For example, when each bit of the modulation coding mode subfield corresponding to the codeword 1 is all 0s, it indicates that the codeword 1 channel is not used, and further It can be characterized that the q value is only 0 corresponding to codeword 0, otherwise, the characterized q value includes 0 and 1 corresponding to codeword 0 and codeword 1, respectively;

a transport block to codeword mapping identifier subfield, configured to carry a transport block to a codeword mapping identifier;

a DM-RS sequence scrambling ID indicator subfield, configured to carry a DM-RS sequence scrambling ID;

a precoding coefficient subfield for carrying precoding coefficients; as described above, the precoding carried by the subfield The code coefficients may include precoding coefficients used by all the cooperative cells, or may only include precoding coefficients used by the coordinated cells that receive the cooperative control information. Preferably, in order to reduce the number of cooperative control information, the latter method is adopted.

a resource allocation type identifier sub-domain, configured to carry a resource allocation type identifier;

The downlink resource allocation sub-domain is configured to carry the resource frequency domain location information, or further carry the resource time domain location information.

When the processed data is data that is scrambled by the source data, the protocol control information sent to the serving cell and other coordinated cells may be different, and the corresponding message format carrying the cooperative control information may also be different:

The second message format, for the message format sent to the serving cell, may be the same as the first message format of the foregoing first message format, except that the scrambling indication information is not required to be carried, so the modulation coding mode subfield in the message is not It is then necessary to characterize the scrambling indication information, that is, it is not necessary to characterize the corresponding codeword

0 or 1 q value information;

The third message format, for the message format sent to other serving cells, specifically includes: a transport block to codeword mapping identifier subfield in the first message, a DM-RS sequence scrambling ID indicating subfield, and a precoding coefficient The sub-domain, the resource allocation type identifier sub-domain, and the downlink resource allocation sub-domain; in addition, the modulation mode sub-domain is further configured to carry the modulation mode indication information.

In the first embodiment, the message carrying the cooperative control information may be sent to each coordinated cell through an interface dedicated to transmitting the coordinated control information.

With the cooperative control information transmitting method provided in the above embodiment 1, the distribution of control parameters required for processing the data between the cooperative cells is realized.

Example 2:

Based on the method for transmitting the cooperative control information provided by the foregoing embodiment 1, the second embodiment provides a data sending method, where the data shared by each coordinated cell is source data, that is, the data to be processed is source data, and the cooperative control information includes : Scrambling indication information, modulation and coding scheme indication information, DM-RS Sequence indication information, precoding indication information, and resource allocation scheme indication information, and the detailed process is shown in FIG. 4, including:

Step S401: The coordinated cell receives the cooperation control information sent by the CoMP processing apparatus.

Step S402: Perform channel coding on the source data according to the modulation and coding scheme indication information in the cooperative control information to obtain the encoded data.

Specifically, first, according to the transport block to codeword mapping identifier, a codeword channel for encoding the source data is determined, and the source data is encoded by using the corresponding codeword channel.

Step S403: Perform scrambling on the encoded data according to the scrambling indication information in the cooperation control information to obtain the scrambled data. The step includes:

First, a scrambling sequence required for scrambling processing is generated. In LTE, the UE channel coded data is scrambled using a scrambling code generated by a 31-bit pseudo-random Gold code. The Gold code sequence is generated by the first M sequence and the second M sequence, where the initial value is a fixed value, which is independent of the serving cell and the UE, and the initial value of (binary) (represented by a decimal number) is determined by the following formula:

=∑: ) · 2 ^m 2 ¹⁴ + ^ 2 ¹³ + \ n _s / 2" · 2 ⁹ + ;

The initial value is related to the serving cell and the UE, where n _mT1 represents the temporary network identification number RNTI of the UE, and the value ranges from [1,65523], =0 or 1, corresponding to the codeword 0 or the codeword 1, indicating wireless. The slot number in the frame, the value range is [1,19], Λ^" indicates the physical identification number PCI of the serving cell, and the value range is [1, 503]. It can be seen that the parameters related to the UE scrambling sequence are determined by the UE. RNTI, PCI of the serving cell, value, and slot number of the transmitted data.

Therefore, in this step, the value may be obtained from the received cooperative control information; for the slot number, when it is used in a fixed manner, it may be saved locally beforehand, and if it is not used in a fixed manner, from the received cooperative control information For the PCI of the serving cell of the UE, in this embodiment, when forming the coordinated cell set, each coordinated cell locally maintains the PCI of each coordinated cell, so when determining the scrambling sequence, the local cell can be directly saved. PCI of the serving cell of the UE; for the RNTI of the UE, in this embodiment, when the source data is shared, that is, when the coordinated cell receives the source data, Receive the RNTI of the UE.

After the scrambling sequence is determined, the encoded data is scrambled using a scrambling sequence to obtain scrambled data.

Step S404: Modulate the scrambled data according to the modulation and coding scheme indication information to obtain modulated data.

When modulating, the scrambled data is modulated using the corresponding codeword channel.

Step S405: Generate a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information.

The DM-RS of the data is also generated by a pseudo-random sequence whose initial value is determined by the following formula:

c _mii = ([n _s / 2j ₊ l) - (2NZ" + l) - 2 ¹⁶ + n _SCID

Where is the sequence scrambling ID associated with the PDSCH transmission, with a value of 0 or 1. It can be seen that the DM-RS sequence related parameters of the UE include the PCI of the serving cell, and the slot number n _{sad of the} transmitted data.

In this step, for ^ _rf , it can be determined by the DM-RS sequence indication information in the cooperation control information; the PCI and n _{s of the} serving cell can be obtained in the same manner as in the above step S403, and will not be described in detail here. .

A DM-RS sequence is generated based on the determined initial value of the random sequence.

This step and the above steps S402-404 have no strict sequence.

Step S406: Precoding the modulated data and the DM-RS sequence according to precoding indication information (ie, precoding coefficients) in the cooperation control information, to obtain precoded data and a precoded DM-RS sequence.

In this step, when the precoding coefficients used by all the coordinated cells are included in the precoding indication information, the coordinated cell needs to obtain the precoding coefficients used by itself from the precoding process for subsequent precoding processing.

After the precoding process in this step is completed, the data processed by the source data is obtained. Step S407, according to the resource allocation scheme indication information in the cooperation control information, including: a resource allocation type identifier, a resource frequency domain location information, and a resource time domain location information, and performing pre-coded data and pre-coded DM-RS sequences. Physical resource mapping.

Step S408: Each coordinated cell sends the pre-coded data and the pre-coded DM-RS sequence to the UE by using the mapped physical resource, that is, the processed data is sent in the physical downlink shared channel PDSCH corresponding to the time slot, in the corresponding The channel transmits the processed DM-RS sequence.

Step S409: The serving cell sends a DCI related to the data in the physical downlink control channel PDCCH corresponding to the time slot, and is used when the UE receives the data.

In the second embodiment of the present invention, the data shared by each coordinated cell is source data. In addition to the serving cell, other coordinated cells may receive source data sent by the serving cell to share data to be processed. Moreover, since the shared data is source data, each coordinated cell, including the serving cell, performs the same processing flow on the source data.

The above data transmission method provided by Embodiment 2 of the present invention realizes transparent transmission of multiple points of downlink cooperation of data.

Example 3:

Based on the cooperative control information sending method provided in the foregoing embodiment 1, the third embodiment provides a data sending method, where the data shared by each coordinated cell is data that is scrambled by the source data, that is, data that needs to be processed. For the data to be scrambled by the source data, the source data may be subjected to encoding and scrambling processing in advance by the serving cell, and the processed data may be sent to other coordinated cells to implement coding between the coordinated cells. The sharing of data after scrambling is processed. Therefore, in the third embodiment, the processing flow of the data between the serving cell and the other coordinated cells is different, and correspondingly, the cooperative control information received by the serving cell and other coordinated cells may be different.

The cooperative control information received by the serving cell, as described in the foregoing Embodiment 1, includes: modulation and coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information; correspondingly, the serving cell The processing flow of the source data is the same as that in the above embodiment 2 The process shown is the same, except that in the above step S403, the q-value information can be determined by the serving cell itself, does not need to be acquired from the cooperative control information, and after the encoded scrambled data is obtained, the data is transmitted to other Each collaborative cell;

The cooperation control information received by the other coordinated cells includes: modulation scheme indication information (considering that the current modulation and coding scheme adopts a unified format for common indication, so the modulation coding scheme indication information may also be used, but the coding scheme indication information does not need to be used) The DM-RS sequence indication information, the precoding indication information, and the resource allocation scheme indication information, and the detailed process of the data processing after the coding and scrambling processing by other coordinated cells is as shown in FIG. 5, and includes:

Step S501: The coordinated cell receives the cooperation control information sent by the CoMP processing apparatus.

Step S502: Modulate the coded data according to the modulation and coding scheme indication information to obtain modulated data.

Specifically, first, according to the transport block to codeword mapping identifier, a codeword channel for modulating the source data is determined, and the scrambled data is modulated by the corresponding codeword channel.

Step S503: Generate a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information.

^ - (k 2j + l) - (2N + l) - 2 ¹⁶ _{+ 3⁄4c/Z)}

The sequence scrambling ID associated with the PDSCH transmission is 0 or 1, indicating the slot number in the radio frame, and the value range is [1, 19], indicating the physical identification number of the serving cell, PCI. The range is [1,503]. It can be seen that the DM-RS sequence related parameters of the UE include the PCI of the serving cell, the slot number n _{s of the} transmitted data, and n _scid .

Therefore, in this step, for ^ _rf , it can be determined by the DM-RS sequence indication information in the cooperative control information; when the slot number is fixedly used, it can be saved locally beforehand, if it is not fixedly used, then Obtained in the received cooperative control information; for the PCI of the serving cell of the UE, In this embodiment, when the coordinated cell set is formed, each coordinated cell maintains the PCI of each coordinated cell locally, so when determining the scrambling sequence, the saved UE's service 'J, the area PCI may be directly obtained locally. For the RNTI of the UE, in this embodiment, when the source data is shared, that is, the coordinated cell receives the source data and simultaneously receives the RNTI of the UE.

This step and the above step S502 have no strict sequence.

Step S504: Precoding the modulated data and the DM-RS sequence according to precoding indication information (ie, precoding coefficients) in the cooperation control information, to obtain precoded data and a precoded DM-RS sequence.

After the precoding process in this step is completed, the data processed by the source data is obtained. Step S505: According to the resource allocation scheme indication information in the cooperation control information, including: a resource allocation type identifier, a resource frequency domain location information, and a resource time domain location information, and performing pre-coded data and the pre-coded DM-RS sequence. Physical resource mapping.

Step S506: Each coordinated cell sends the pre-coded data and the pre-coded DM-RS sequence to the UE by using the mapped physical resource, that is, the processed data is sent in the PDSCH corresponding to the slot n _s , and is sent on the corresponding channel. The processed DM-RS sequence.

Step S507: The serving cell sends a DCI related to the data in the physical downlink control channel PDCCH corresponding to the time slot, and is used when the UE receives the data.

In the third embodiment of the present invention, the data shared by each coordinated cell is data that is scrambled by the source data. Except for the serving cell, other coordinated cells may receive the data scrambled by the source cell after receiving the serving cell. , in order to share the data that needs to be processed.

With the above data transmission method provided by Embodiment 3 of the present invention, transparent transmission of downlink coordinated multi-point data is realized. Example 4:

Based on the same inventive concept, the cooperative control information sending method according to the above embodiment of the present invention, correspondingly, the fourth embodiment of the present invention further provides a cooperative control information transmitting device, that is, the above-mentioned CoMP processing device, and its structure is shown in FIG. 6 . As shown, it specifically includes:

a determining unit 601, configured to determine, after sending data to the UE, cooperative control information required for processing and transmitting the data;

The first sending unit 602 is configured to send the cooperative control information to each coordinated cell that performs downlink coordinated multipoint transmission on the data.

Preferably, the determining unit 601 is specifically configured to: when the data is source data, determine scrambling indication information, modulation and coding scheme indication information, and demodulation reference required for processing and transmitting the data. Signal DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information.

Preferably, the determining unit 601 is specifically configured to: when the data is data that is scrambled by the source data, determine, to be used, the serving cell that is sent to the UE in each coordinated cell, Modulation coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information required for processing and transmitting the data; and determining to transmit to other coordinated cells except the serving cell Modulation scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information required for processing and transmitting the data.

Preferably, the determining unit 601 is specifically configured to determine q value information of the corresponding codeword 0 or 1 included in the scrambling indication information.

Preferably, the determining unit 601 is specifically configured to: the modulation and coding mode indication information and the transport block to codeword mapping identifier included in the modulation and coding scheme indication information, where the modulation scheme indication information includes modulation mode indication information and transmission. a block-to-codeword mapping identifier, the DM-RS sequence indication information includes a DM-RS sequence scrambling ID, the precoding indication information includes precoding coefficients, and the resource The allocation scheme indication information includes a resource allocation type identifier and resource frequency domain location information. Preferably, the determining unit 601 is further configured to: when the resource time domain location information required for processing the data is a specified time slot in a non-fixed radio frame, determine the scrambling indication information, The DM-RS sequence indication information and the resource allocation scheme indication information include resource time domain location information.

Preferably, the first sending unit 602 is specifically configured to: when the data is source data, send a message carrying the cooperation control information to each coordinated cell that performs downlink coordinated multi-point transmission on the data. The modulation coding mode subfield carries the modulation coding mode indication information, and the transport block to the codeword mapping subfield carries the transport block to the codeword mapping identifier, and the DM-RS sequence scrambling ID indicates the subdomain carries the DM-RS sequence. The scrambling ID carries the precoding coefficient through the precoding coefficient subfield, the resource allocation type identifier subdomain carries the resource allocation type identifier, and the downlink resource allocation subdomain carries the resource frequency domain location information, and the cooperative control information is sent to the Each of the coordinated coding mode subfields includes: a modulation coding mode subfield corresponding to codeword 0 and a modulation coding mode subfield corresponding to codeword 1; and a modulation coding mode subfield corresponding to the codeword 1 It is also used to characterize the q value information of the corresponding codeword 0 or 1.

Preferably, the first sending unit 602 is specifically configured to: when the data is data that is scrambled by the source data, is sent to the serving cell of the UE that carries the cooperative control information. In the message, the modulation coding mode sub-domain carries the modulation coding mode indication information, and the transport block to the codeword mapping identifier is carried by the transport block to the codeword mapping identifier sub-domain, and the DM-RS sequence scrambling ID indication sub-domain carries the DM-RS. The sequence scrambling ID, the precoding coefficient subdomain carries the precoding coefficient, the resource allocation type identifier subdomain carries the resource allocation type identifier, and the downlink resource allocation subdomain carries the resource frequency domain location information, and the cooperative control information is sent to The serving cell;

Transmitting, by the modulation mode sub-domain, the modulation mode indication information, by transmitting the block-to-code, in the message carrying the cooperation control information of each coordinated cell that performs downlink coordinated multi-point transmission on the data except the serving cell The word mapping identifier sub-domain carries a transport block-to-codeword mapping identifier, and the DM-RS sequence scrambling ID indicates that the sub-domain carries the DM-RS sequence scrambling ID, and the pre-coding coefficient sub-domain is adopted. The pre-coding coefficient is carried, the resource allocation type identifier sub-domain carries the resource allocation type identifier, and the downlink resource allocation sub-domain carries the resource frequency domain location information, and the cooperative control information is sent to the serving cell of the UE.

Preferably, the first sending unit 602 is further configured to send the resource time domain location information to the coordinated cells by using the downlink resource allocation sub-domain to carry the resource time domain location information.

Preferably, the determining unit 601 is configured to receive parameter information for determining coordinated control information sent by each coordinated cell, and determine the cooperative control information according to the parameter information.

Example 5

Based on the same inventive concept, the data transmitting method according to the foregoing embodiment of the present invention, correspondingly, the fifth embodiment of the present invention further provides a data transmitting apparatus in a coordinated cell, and a schematic structural diagram thereof is shown in FIG.

The receiving unit 701 is configured to receive collaboration control information.

The processing unit 702 is configured to process, according to the collaboration control information, data that needs to perform downlink coordinated multi-point transmission;

The second sending unit 703 is configured to send the processed data to the user equipment UE by using the physical resource indicated by the cooperation control information.

Preferably, the processing unit 702 is specifically configured to: perform channel coding on the source data that needs to perform downlink coordinated multi-point transmission according to the modulation and coding scheme indication information in the cooperation control information, to obtain encoded data; The scrambling indication information in the cooperation control information scrambles the encoded data to obtain scrambled data; and modulates the scrambled data according to the modulation and coding scheme indication information, and obtains modulation And generating a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information; and, according to the precoding indication information in the cooperation control information, the modulated data and the The DM-RS sequence is precoded to obtain precoded data and precoded DM-RS sequences.

Preferably, the processing unit 702 is specifically configured to: according to the locally saved service of the UE The physical identification number PCI of the area, the fixed time domain location information of the resource, the wireless network temporary identification number RNTI of the UE received along with the data, and the q value information of the corresponding codeword 0 or 1 in the cooperation control information , generating a scrambling sequence; or

a physical identification number PCI of the serving cell of the UE that is locally stored, resource time domain location information in the cooperation control information, a radio network temporary identification number RNTI of the UE that is received along with the data, and the collaboration The q value information corresponding to the codeword 0 or 1 in the control information is generated, and the scrambling sequence 歹l is generated;

The encoded data is scrambled using the scrambling sequence to obtain scrambled data.

Preferably, the processing unit 702 is specifically configured to: when the device is not located in the serving cell of the UE, modulate the data after coding and scrambling according to the modulation scheme indication information in the cooperation control information. Obtaining the modulated data; the data after the encoding and scrambling processing is data obtained by performing scrambling processing on source data that needs to perform downlink cooperative multi-point transmission; and according to the demodulation reference signal in the cooperative control information DM-RS sequence indication information generates a DM-RS sequence; and pre-encodes the modulated data and the DM-RS sequence according to pre-coding indication information in the cooperation control information to obtain pre-coded data and pre- The encoded DM-RS sequence.

Preferably, the processing unit 702 is specifically configured to: when the device is located in the serving cell of the UE, according to the modulation and coding scheme indication information in the cooperative control information, the source that needs to perform downlink coordinated multipoint transmission The data is channel-encoded to obtain the encoded data; and the encoded data is scrambled to obtain scrambled data; and the scrambled data is modulated according to the modulation and coding scheme indication information, and the modulated data is obtained. And generating a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information; and according to the precoding indication information in the cooperation control information, the modulated data and The DM-RS sequence is precoded to obtain precoded data and precoded DM-RS sequences.

Preferably, the processing unit 702 is specifically configured to: according to the fixed time domain location information of the fixed use, the locally stored physical identification number PCI of the serving cell of the UE, and the DM-RS sequence in the cooperative control information. Disturbing the ID, generating a DM-RS sequence; or according to the information in the collaborative control information The source time domain location information, the locally stored physical identification number PCI of the serving cell of the UE, and the DM-RS sequence scrambling ID in the cooperative control information, generate a DM-RS sequence.

Preferably, the second sending unit 703 is specifically configured to perform physical resource mapping on the pre-coded data and the pre-coded DM-RS sequence according to the resource allocation scheme indication information in the cooperation control information; The precoded data and the precoded DM-RS sequence are transmitted to the UE using the mapped physical resources.

Example 6:

Based on the same inventive concept, the cooperative control information sending method and the data sending method are provided according to the foregoing embodiments of the present invention. Accordingly, the sixth embodiment of the present invention further provides a data sending system, and a schematic structural diagram thereof is shown in FIG. The method includes: a cooperation control information transmitting apparatus 801 and a data transmitting apparatus 802 of each coordinated cell performing downlink coordinated multipoint transmission, where:

The cooperative control information sending apparatus 801 is configured to determine, after transmitting data to the UE, cooperative control information required for processing and transmitting the data, and send the cooperative control information to each coordinated cell. Data transmitting device 802;

The data sending device 802 is configured to receive the cooperation control information, and process data that needs to perform downlink coordinated multi-point transmission according to the cooperation control information; and use physical resources indicated by the cooperation control information to The UE transmits the processed data.

In summary, the solution provided by the embodiment of the present invention includes: determining, before sending data to the user equipment UE, the cooperation control information required for processing and transmitting the data; and transmitting the cooperation control information to the data. Downlink coordinated multi-point transmission of each coordinated cell. The method further includes: receiving, by each coordinated cell, the cooperative control information; and processing, according to the cooperative control information, data that needs to perform downlink coordinated multipoint transmission; and transmitting the processed data to the UE by using the physical resource indicated by the cooperative control information. With the solution provided by the embodiment of the present invention, the distribution of the control parameters required for processing the data between the coordinated cells is realized, and the transparent transmission of the downlink cooperation of the data is realized. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the present invention. The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A method for transmitting cooperative control information, comprising:

2. The method according to claim 1, wherein when the data is source data, the cooperative control information comprises: scrambling indication information, modulation and coding scheme indication information, and demodulation reference signal DM-RS sequence Indication information, precoding indication information, and resource allocation scheme indication information.

The method according to claim 1, wherein when the data is data that is scrambled by the source data, the method is sent to the serving cell of the UE in each coordinated cell. The cooperation control information includes: modulation coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information; and the cooperation control information that is sent to each of the coordinated cells except the serving cell includes: Modulation scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information.

The method according to claim 2, wherein the scrambling indication information comprises: q-value information corresponding to the codeword 0 or 1.

The method according to claim 3 or 4, wherein the modulation and coding scheme indication information comprises: modulation and coding mode indication information and a transport block to codeword mapping identifier;

The modulation scheme indication information includes: modulation mode indication information and a transport block to codeword mapping identifier;

The DM-RS sequence indication information includes: a DM-RS sequence scrambling ID;

The precoding indication information includes: a precoding coefficient;

The resource allocation scheme indication information includes: a resource allocation type identifier and resource frequency domain location information.

The method according to claim 5, wherein when the resource time domain location information required for processing the data is a designated time slot in a non-fixed radio frame, the scrambling indication information, The DM-RS sequence indication information and the resource allocation scheme indication information further include: resource time domain location information.

The method according to claim 5, wherein the precoding coefficient is a precoding coefficient corresponding to a coordinated cell that receives the cooperative control information; or

The precoding coefficient includes precoding coefficients respectively corresponding to the coordinated cells.

The method according to claim 1, wherein, when the data is source data, the cooperative control information is sent to each coordinated cell that performs downlink coordinated multipoint transmission on the data, specifically:

Transmitting, by the modulation coding mode sub-domain, the modulation coding mode indication information, by using the transmission block to the codeword mapping identifier, in the message carrying the cooperation control information of each coordinated cell that is sent to the coordinated multi-point transmission of the data. The domain carries the transport block to the codeword mapping identifier, and the DM-RS sequence scrambling ID indicates that the subdomain carries the DM-RS sequence scrambling ID, carries the precoding coefficient through the precoding coefficient subfield, and carries the resource through the resource allocation type identifier subdomain. And the allocation type identifier, the downlink resource allocation sub-domain carries the resource frequency domain location information, and the coordinated control information is sent to the coordinated cells, where the modulation and coding mode sub-domain includes: a modulation and coding mode corresponding to the codeword 0 The modulation coding mode subfield corresponding to the subfield and the codeword 1; the modulation coding mode subfield corresponding to the codeword 1 is further used to represent the q value information of the corresponding codeword 0 or 1.

The method according to claim 1, wherein when the data is data that is scrambled by encoding the source data, the cooperative control information is sent to downlink coordinated multipoint transmission of the data. Each of the collaborative communities includes:

Transmitting, by the modulation coding mode sub-domain, the modulation coding mode indication information, and transmitting the transmission block to the codeword through the transmission block to the codeword mapping identifier sub-domain, in the message that is sent to the serving cell of the UE that carries the cooperation control information Mapping identifier, indicating the subdomain carrying the DM-RS through the DM-RS sequence scrambling ID The sequence scrambling ID carries the precoding coefficient through the precoding coefficient subfield, the resource allocation type identifier subdomain carries the resource allocation type identifier, and the downlink resource allocation subdomain carries the resource frequency domain location information, and sends the cooperative control information to The serving cell;

Transmitting, by the modulation mode sub-domain, the modulation mode indication information, by transmitting the block-to-code, in the message carrying the cooperation control information of each coordinated cell that performs downlink coordinated multi-point transmission on the data except the serving cell The word mapping identifier sub-domain carries a transport block-to-codeword mapping identifier, and the DM-RS sequence scrambling ID indicates that the sub-domain carries the DM-RS sequence scrambling ID, and the pre-coding coefficient sub-domain carries the pre-coding coefficient, and the resource allocation type identifier is adopted. The sub-domain carries the resource allocation type identifier, and the downlink resource allocation sub-domain carries the resource frequency domain location information, and the cooperative control information is sent to the serving cell of the UE.

The method according to claim 8 or 9, wherein the downlink resource allocation subfield further carries resource time domain location information.

The method of claim 1, wherein determining the collaboration control information required for processing and transmitting the data comprises:

Receiving parameter information for determining cooperation control information sent by each coordinated cell; determining the cooperation control information according to the parameter information.

12. A data transmission method, comprising:

The method according to claim 12, wherein, according to the collaboration control information, processing data that needs to perform downlink coordinated multipoint transmission, specifically includes:

And performing channel coding on the source data that needs to perform downlink coordinated multi-point transmission according to the modulation and coding scheme indication information in the cooperation control information, to obtain coded data; And scrambling the encoded data according to the scrambling indication information in the cooperation control information to obtain scrambled data;

And modulating the scrambled data according to the modulation and coding scheme indication information to obtain modulated data;

Generating the information according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information

DM-RS sequence;

And precoding the modulated data and the DM-RS sequence according to the precoding indication information in the cooperation control information to obtain precoded data and a precoded DM-RS sequence.

The method according to claim 13, wherein the scrambled data is scrambled according to the scrambling indication information in the cooperation control information, and the scrambled data is obtained, which includes: The physical identification number PCI of the serving cell of the UE, the fixed time domain location information of the UE, the temporary network identification number RNTI of the UE received along with the data, and the corresponding codeword 0 in the cooperation control information Or a q value information of 1 to generate a scrambling sequence; or

The method according to claim 12, wherein, when the coordinated cell is not a serving cell of the UE, processing data that needs to perform downlink coordinated multipoint transmission according to the cooperation control information, Specifically include:

Decoding the data after the scrambling process according to the modulation scheme indication information in the cooperation control information to obtain modulated data; and the data after the coding scrambling processing is a source for downlink coordinated multipoint transmission Data encoded after scrambling processing;

Generating a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information; And precoding the modulated data and the DM-RS sequence according to the precoding indication information in the cooperation control information to obtain precoded data and a precoded DM-RS sequence.

The method according to claim 15, wherein, when the coordinated cell is a serving cell of the UE, processing data that needs to perform downlink coordinated multipoint transmission according to the cooperation control information, specifically Includes:

And performing channel coding on the source data that needs to perform downlink coordinated multi-point transmission according to the modulation and coding scheme indication information in the cooperation control information, to obtain coded data;

Scrambling the encoded data to obtain scrambled data;

Generating a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information;

The method according to claim 13, 15 or 16, wherein the DM-RS sequence is generated according to the demodulation reference signal DM-RS sequence indication information in the cooperation control information, specifically: according to a fixed use Generating time domain location information, a locally stored physical identification number PCI of the serving cell of the UE, and a DM-RS sequence scrambling ID in the cooperative control information to generate a DM-RS sequence; or

And generating a DM-RS sequence according to the resource time domain location information in the cooperation control information, the locally stored physical identification number PCI of the serving cell of the UE, and the DM-RS sequence scrambling ID in the cooperation control information.

The method according to claim 13, 15 or 16, wherein the sending the processed data to the UE by using the physical resource indicated by the cooperative control information comprises:

Decoding the pre-coded data according to the resource allocation scheme indication information in the cooperation control information Pre-coded DM-RS sequence for physical resource mapping;

The precoded data and the precoded DM-RS sequence are transmitted to the UE using the mapped physical resources.

19. A cooperative control information transmitting apparatus, comprising:

The device according to claim 19, wherein the determining unit is specifically configured to: when the data is source data, determine scrambling indication information required for processing and transmitting the data And modulation coding scheme indication information, demodulation reference signal DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information.

The device according to claim 19, wherein the determining unit is specifically configured to: when the data is data that is scrambled by encoding the source data, determine to be sent to the coordinated cells. Modulation coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resource allocation scheme indication information required for processing and transmitting the data of the serving cell of the UE; and determining to send to the serving cell The modulation scheme indication information, the DM-RS sequence indication information, the precoding indication information, and the resource allocation scheme indication information required for processing and transmitting the data of the other coordinated cells outside the serving cell.

The device according to claim 20, wherein the determining unit is specifically configured to determine q value information of the corresponding codeword 0 or 1 included in the scrambling indication information.

The device according to claim 20 or 22, wherein the determining unit is specifically configured to determine modulation coding mode indication information and a transport block to codeword mapping identifier included in the modulation and coding scheme indication information, where The modulation scheme indication information included in the modulation scheme indication information and the transport block to codeword mapping identifier, the DM-RS sequence scrambling ID included in the DM-RS sequence indication information, The precoding indication information includes precoding coefficients, the resource allocation scheme indicating resource allocation type identifiers and resource frequency domain location information included in the information.

The device according to claim 23, wherein the determining unit is further configured to: when the resource time domain location information required for processing the data is a specified time slot in a non-fixed radio frame Determining the resource time domain location information included in the scrambling indication information, the DM-RS sequence indication information, and the resource allocation scheme indication information.

The device according to claim 19, wherein the first sending unit is specifically configured to send, when the data is source data, to each collaboration for performing downlink coordinated multipoint transmission on the data. In the message carrying the cooperative control information of the cell, the modulation coding mode sub-domain carries the modulation and coding mode indication information, and the transport block to the codeword mapping identifier is carried by the transport block to the codeword mapping identifier sub-domain, and is added by the DM-RS sequence. The scrambling ID indicates that the sub-domain carries the DM-RS sequence scrambling ID, and the precoding coefficient sub-domain carries the pre-coding coefficient, the resource allocation type identifier sub-domain carries the resource allocation type identifier, and the downlink resource allocation sub-domain carries the resource frequency domain location information. Transmitting the cooperative control information to the coordinated cells, where the modulation and coding mode subfield includes: a modulation and coding mode subfield corresponding to codeword 0 and a modulation and coding mode subfield corresponding to codeword 1; The modulation coding mode subfield corresponding to codeword 1 is also used to characterize the q value information of the corresponding codeword 0 or 1.

The device according to claim 19, wherein the first sending unit is specifically configured to: when the data is data that is scrambled by encoding the source data, sent to the UE In the message carrying the cooperative control information of the serving cell, the modulation coding mode sub-domain carries the modulation and coding mode indication information, and the transport block to the codeword mapping identifier is carried by the transport block to the codeword mapping identifier sub-domain, and the DM-RS sequence is adopted. The scrambling ID indicates that the sub-domain carries the DM-RS sequence scrambling ID, and the precoding coefficient sub-domain carries the pre-coding coefficient, the resource allocation type identifier sub-domain carries the resource allocation type identifier, and the downlink resource allocation sub-domain carries the resource frequency domain location. Information, the cooperative control information is sent to the serving cell;

Coordinates sent to other than the serving cell for downlink coordinated multi-point transmission of the data In the message carrying the cooperative control information, the modulation mode sub-domain carries the modulation mode indication information, and the transport block to the codeword mapping identifier is carried by the transport block to the codeword mapping identifier sub-domain, and is scrambled by the DM-RS sequence. The ID indication sub-domain carries the DM-RS sequence scrambling ID, and the pre-coding coefficient sub-domain carries the pre-coding coefficient, the resource allocation type identifier sub-domain carries the resource allocation type identifier, and the downlink resource allocation sub-domain carries the resource frequency domain location information, The cooperative control information is sent to a serving cell of the UE.

The device according to claim 25 or 26, wherein the first sending unit is further configured to: use the downlink resource allocation sub-domain to carry resource time domain location information, and use the resource time domain location information And sent to each coordinated cell.

The device according to claim 19, wherein the determining unit is configured to receive parameter information for determining cooperation control information that is sent by each coordinated cell, and determine, according to the parameter information, Collaboration control information.

A data transmitting apparatus in a coordinated cell, comprising:

a receiving unit, configured to receive cooperative control information;

a processing unit, configured to process, according to the collaboration control information, data that needs to perform downlink coordinated multipoint transmission;

The second sending unit is configured to send the processed data to the user equipment UE by using the physical resource indicated by the cooperation control information.

The device according to claim 29, wherein the processing unit is configured to: perform channel on source data that needs to perform downlink coordinated multi-point transmission according to modulation coding scheme indication information in the cooperation control information. Encoding to obtain the encoded data; and scrambling the encoded data according to the scrambling indication information in the cooperative control information to obtain scrambled data; and according to the modulation and coding scheme indication information, Performing modulation on the scrambled data to obtain modulated data; and generating a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperative control information; and according to the precoding indication in the cooperative control information Information, on the modulated data and said The DM-RS sequence is precoded to obtain precoded data and precoded DM-RS sequences.

The device according to claim 30, wherein the processing unit is specifically configured to: according to a locally stored physical identification number of the serving cell of the UE, a fixed time domain location information, and a companion Generating, by the data, the radio network temporary identification number RNTI of the UE and the q value information of the corresponding codeword 0 or 1 in the cooperation control information, to generate a scrambling sequence; or

The device according to claim 29, wherein the processing unit is specifically configured to: according to a modulation scheme indication information in the cooperation control information, when the device is not located in a serving cell of the UE, Modulating the data after the scrambling process to obtain the modulated data; the data after the coding scrambling process is data obtained by encoding and scrambling the source data that needs to perform downlink coordinated multi-point transmission; Demodulating reference signal DM-RS sequence indication information in the cooperation control information to generate a DM-RS sequence; and pre-modulating the modulated data and the DM-RS sequence according to precoding indication information in the cooperation control information Encoding, obtaining pre-encoded data and pre-coded DM-RS sequences.

The device according to claim 32, wherein the processing unit is specifically configured to, according to a modulation and coding scheme indication information in the cooperation control information, when the device is located in a serving cell of the UE, Performing channel coding on source data that needs to perform downlink coordinated multi-point transmission to obtain encoded data; and scrambling the encoded data to obtain scrambled data; and according to the modulation and coding scheme indication information, Performing modulation on the scrambled data to obtain modulated data; and generating a DM-RS sequence according to the demodulation reference signal DM-RS sequence indication information in the cooperative control information; and according to the precoding indication in the cooperative control information Information, precoding the modulated data and the DM-RS sequence to obtain pre-coded data and a pre-coded DM-RS sequence.

The device according to claim 30, 32 or 33, wherein the processing unit is specifically configured to: according to fixed time domain location information of the fixed use, locally stored physical identification number of the serving cell of the UE a DM-RS sequence scrambling ID in the PCI and the cooperative control information, to generate a DM-RS sequence; or a physical identification of the serving cell of the UE locally saved according to resource time domain location information in the cooperation control information The PCI and the DM-RS sequence scrambling ID in the cooperative control information generate a DM-RS sequence.

The device according to claim 30, 32 or 33, wherein the second sending unit is specifically configured to: according to the resource allocation scheme indication information in the cooperation control information, the pre-coded data and The pre-coded DM-RS sequence performs physical resource mapping; and uses the mapped physical resources to send the pre-coded data and the pre-coded DM-RS sequence to the UE.

36. A data transmission system, comprising: a cooperative control information transmitting apparatus and a data transmitting apparatus in each coordinated cell that performs downlink coordinated multipoint transmission, wherein:

The cooperative control information transmitting apparatus is configured to determine, after transmitting data to the user equipment UE, cooperative control information required for processing and transmitting the data; and send the cooperation control information to the collaboration a data transmitting apparatus, configured to receive the cooperation control information; and process, according to the cooperation control information, data that needs to perform downlink coordinated multipoint transmission; and use a physical resource indicated by the cooperation control information, The processed data is transmitted to the UE.