WO2012106993A1

WO2012106993A1 - Method, device, and system for sharing and transmitting data

Info

Publication number: WO2012106993A1
Application number: PCT/CN2012/071008
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: CN102638851B; CN102638851A

Abstract

A method, device, and system for sharing and transmitting data, comprising: a serving cell confirming within a UE governed thereby the data requiring downlink coordinated multipoint transmission; and transmitting the confirmed data to coordinated cells of the serving cell; also comprising: the coordinated cells that are performing the downlink coordinated multipoint transmission with the serving cell where the UE belongs receiving the data transmitted by the serving cell; processing the received data; and transmitting the processed data to the UE. Employment of the solution provided in embodiments of the present invention allows for the sharing among the coordinated cells of the data transmitted to the UE, and allows for transparent downlink coordinated multipoint transmission of the data.

Description

The present invention claims to be submitted to the Chinese Patent Office on February 12, 2011, and the application number is 201110036957.8. The invention is entitled "A Data Sharing and Transmission Method, Apparatus and System" Chinese Patent Application Priority is hereby incorporated by reference in its entirety.

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 data sharing and 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 the data of the user equipment UEs under the jurisdiction of the serving cell, and then transmit them together 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 signaling is not added to notify the UE that the currently transmitted data is in the CoMP transmission state, and the UE completely receives the data according to the non-CoMP scheme, that is, from the UE-side perspective. 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 user equipment (UE) 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, the data to be sent is subjected to a series of processing operations. To ensure transparent transmission, the UE can parse the same data after transmitting the data to be processed by the UE. Each of the cooperating cells needs to share the same data. However, there is no clear method in the prior art to realize the sharing of data between the cooperative cells, and thus the transparent transmission of data to the downlink cooperation cannot be realized.

Summary of the invention

The embodiments of the present invention provide a data sharing and sending method, device, and system, which are used to implement sharing of data sent to a UE between coordinated cells. The embodiment of the invention provides a data sharing method, including:

The serving cell determines data that it needs to perform downlink coordinated multipoint transmission for the user equipment UE;

The determined data is transmitted to each coordinated cell of the serving cell.

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

Each coordinated cell that performs downlink coordinated multipoint transmission with the serving cell to which the user equipment UE belongs receives the data sent by the serving cell;

Processing the data; and

The processed data is transmitted to the UE.

The embodiment of the invention further provides a data sharing device in a serving cell, including:

a determining unit, configured to determine, by the serving cell, a user equipment UE that needs to perform downlink coordinated multi-point transmission data;

And a first sending unit, configured to transmit the determined data to each coordinated cell of the serving cell. An embodiment of the present invention further provides a data sending apparatus in a coordinated cell, including:

a receiving unit, configured to receive data sent by a serving cell to which the user equipment UE belongs;

a second processing unit, configured to process the data;

And a second sending unit, configured to send the processed data to the UE.

The embodiment of the present invention further provides a data sending system, including: a data sharing device in a serving cell, and a data sending device in each coordinated cell that performs downlink coordinated multi-point transmission with the serving cell, where:

The data sharing device is configured to determine data that is required by the UE to perform downlink coordinated multipoint transmission; and transmit the determined data to the data sending device in each coordinated cell; the data sending device And for receiving data sent by the data sharing device; processing the data; and transmitting the processed data to the UE.

In the method provided by the embodiment of the present invention, the serving cell determines data that is required by the UE to perform downlink coordinated multipoint transmission, and transmits the determined data to each coordinated cell of the serving cell, thereby implementing data sent to the UE. Sharing between the cooperative cells; and, with the serving cell After receiving the data sent by the serving cell, each coordinated cell that performs coordinated multi-point transmission processes the data and sends the processed data to the UE, so that all coordinated cells perform the same processing on the same 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.

FIG. 1 is a flowchart of a data sharing method 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 data sharing and sending method according to Embodiment 1 of the present invention;

4 is a flowchart of a data sharing and sending method according to Embodiment 2 of the present invention;

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

FIG. 6 is a schematic structural diagram of a data sharing apparatus in a serving cell according to Embodiment 4 of the present invention; FIG. 7 is a schematic structural diagram of a data sending apparatus in a coordinated cell according to Embodiment 5 of the present invention; A schematic diagram of the structure of the data transmission system provided.

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.

The present invention provides a data sharing and sending method, device and system, in order to provide a solution for realizing the sharing of data sent to the UE between the coordinated cells and the transparent transmission of the downlink cooperation of the data. The preferred embodiments of the present invention are described with reference to the accompanying drawings, and the preferred embodiments described herein are intended to illustrate and explain the invention. And in the case of no conflict, the features in the embodiments and embodiments in the present application can be Mutual combination.

An embodiment of the present invention provides a data sharing method, as shown in FIG. 1 , including:

Step S101: The serving cell determines data that is required by the UE to perform downlink coordinated multipoint transmission.

Step S102: Transmit the determined data to each coordinated cell of the serving cell.

An embodiment of the present invention further provides a data sending method, as shown in FIG. 2, including:

Step S201: Each coordinated cell that performs downlink coordinated multi-point transmission with the serving cell to which the UE belongs receives data sent by the serving cell.

Step S202: Process the received data.

Step S203: Send the processed data to the UE.

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

The first embodiment provides a data sharing and sending method, where the shared data is source data, that is, the data that the serving cell transmits to each coordinated cell is source data, as shown in FIG. 3, which specifically includes the following steps:

Step S301: The serving cell determines source data of the UE that needs to perform downlink coordinated multipoint transmission.

Step S302: Transmit the determined source data to each coordinated cell of the serving cell.

In this step, when the source data is transmitted, the radio network temporary identification number RNTI of the UE may be transmitted to each coordinated cell, and used by each coordinated cell to perform scrambling processing on the data.

Specifically, in this step, the source data between the cell base stations and the RNTL of the UE may be used.

After the source data of the serving cell transmission is received by each coordinated cell, the sharing of source data that needs to perform downlink coordinated multipoint transmission is realized. However, before the data is sent to the UE, the serving cell and other coordinated cells need to perform a series of processing operations on the data. For example, the processing operations that need to be explicitly defined in the existing Rel. 8/9/10 specification include: Channel coding, scrambling, modulation, generation demodulation reference Signal DM-RS, precoding and physical resource mapping are described in detail below.

Step S303: Perform channel coding on the source data to obtain encoded data.

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

Step S304: Perform scrambling on the encoded data to obtain scrambled data. The steps include:

First, a scrambling sequence required for the scrambling process is generated. In LTE, the UE channel coded data is scrambled by 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, 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 :

Xi it =∑ ³ :. ( 2 ^m = - 2 ¹⁴ + q - 2 ¹³ + \ n _s / 2" · 2 ⁹ + Ν^';

The initial value is related to the serving cell and the UE, where 3⁄4^ represents the radio network temporary identification number RNTI of the UE, and the value range is [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 of the serving cell PCI, and the value range is [1, 503]. It can be seen that the parameters related to the UE scrambling sequence include the RNTI of the UE, The PCI of the serving cell, and the slot number n _{s of the} transmitted data.

In this step, the relevant parameters for generating the scrambling sequence may be determined before performing the scrambling sequence calculation, for example, the value may be obtained from the received cooperative control information (reception of the cooperative control information is described in detail later); The slot number can be saved locally before it is used in a fixed manner. If it is not used in a fixed manner, it is obtained from the received cooperative control information. For the PCI of the serving cell of the UE, the cooperative cell set is proposed in this embodiment. When the coordinated cell maintains the PCI of each coordinated cell locally, when the scrambling sequence is determined, the PCI of the reserved UE's serving cell may be directly obtained from the local; for the RNTI of the UE, the accompanying source in the above step S302 The data is received together.

After the scrambling sequence is determined, the encoded data is scrambled using a scrambling sequence to obtain scrambled data. Step S305, modulating the scrambled data to obtain modulated data.

When modulating, the scrambled data is modulated according to the determined modulation coding scheme using the corresponding codeword channel.

Step S306, generating a DM-RS sequence.

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

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

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, the slot number of the transmitted data, and ^ _rf .

In this step, for ^ _rf , it can be determined by the DM-RS sequence indication information in the cooperation control information; 卩01 for the serving cell and can be acquired in the same manner as in the above step S304, and will not be described in detail herein.

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

This step and the above steps S303-305 are not strictly sequential.

Step S307: Perform precoding on the modulated data and the DM-RS sequence according to the determined precoding coefficients to obtain precoded data and the precoded DM-RS sequence.

In this step, the precoding coefficient can also be obtained from the received cooperative control information.

After the precoding process in this step is completed, the data processed by the source data is obtained. Step S308: Perform physical resource mapping on the pre-coded data and the pre-coded DM-RS sequence according to the determined resource allocation scheme, including: a resource allocation type identifier, a resource frequency domain location information, and a resource time domain location information.

Step S309: 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 slot n _s . The corresponding channel transmits the processed DM-RS sequence.

Step S310: 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 first embodiment, the source data is sent by the serving cell to other coordinated cells, and the number of sources is realized. According to the sharing, the cooperative cells perform the same processing flow for the shared source data, obtain the processed data, and send the processed data to the UE, thereby realizing transparent transmission of data downlink cooperation.

Example 2:

The second embodiment provides a data sharing and sending method, where the shared data is data that is scrambled by encoding the source data, that is, the data transmitted by the serving cell to each coordinated cell is scrambled by the source data. The data, as shown in FIG. 4, specifically includes the following steps:

Step S401: The serving cell determines source data of the UE that needs to perform downlink coordinated multipoint transmission.

Step S402: Perform channel coding on the source data to obtain encoded data.

Step S403: Perform scrambling on the encoded data to obtain scrambled data. The step includes:

First, a scrambling sequence required for scrambling processing is generated. In LTE, the data of the UE channel coding is adopted.

The scrambling code generated by the 31-bit length pseudo-random Gold code is scrambled. The Gold code sequence is generated by the first M sequence; ^ and the second M sequence; c ₂ , where the initial value of ^ is a fixed value, 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:

x _{2 t} =∑: x ₂ (m) ' 2 ^m = n 2 ¹⁴ ₊ q . 2 ¹³ ₊ n _s / 2" · 2 ⁹ + ;

The initial value is related to the serving cell and the UE, where 3⁄4^ represents the radio network temporary identification number RNTI of the UE, and the value range is [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 of the serving cell PCI, and the value range is [1, 503]. It can be seen that the parameters related to the UE scrambling sequence include the RNTI of the UE. , the PCI of the serving cell, and the slot number n _{s of the} transmitted data.

In this step, the relevant parameters for generating the scrambling sequence can be determined before the scrambling sequence is calculated, for example, the value can be received from the cooperative control information (the reception of the cooperative control information is followed by For detailed description, the acquisition is performed; when the slot number is fixed, it can be saved locally, if it is not used, it is obtained from the received cooperative control information; For the PCI of the serving cell of the UE, this implementation In the example, 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 PCI of the saved UE's serving cell can be directly obtained locally.

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

Step S404: The obtained data scrambled by the source data is transmitted to each coordinated cell of the serving cell.

Specifically, in this step, the encoded and scrambled data can be transmitted by using the X2 interface between the cell base stations. After each coordinated cell receives the data transmitted by the serving cell, the sharing of data requiring downlink coordinated multipoint transmission is realized. However, before the data is sent to the UE, a series of processing operations are required on the data. For example, the processing operations that need to be performed are clearly defined in the existing Rel. 8/9/10 specification, including: channel coding, scrambling, modulation And generating a demodulation reference signal DM-RS, precoding, and physical resource mapping, and processing operations required for encoding the scrambled data, as described below.

Step S405: Modulate the scrambled data to obtain modulated data.

Step S406: Generate a DM-RS sequence.

c _mU -

- 2 ^u ₊ n _SCID

In this step, for ^ _rf , it can be determined by the DM-RS sequence indication information in the cooperation control information; 卩01 for the serving cell and can be acquired in the same manner as in the above step S304, and will not be described in detail herein. A DM-RS sequence is generated based on the determined initial value of the random sequence.

This step and the above step S405 are not strictly sequential.

Step S407: Perform precoding on the modulated data and the DM-RS sequence according to the determined precoding coefficients 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 S408: Perform physical resource mapping on the pre-coded data and the pre-coded DM-RS sequence according to the determined resource allocation scheme, including: a resource allocation type identifier, a resource frequency domain location information, and a resource time domain location information.

Step S409: 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 slot n _s . The corresponding channel transmits the processed DM-RS sequence.

Step S410: 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, the data that is scrambled by the source data is transmitted by the serving cell to each of the coordinated cells, and the data is shared, and the coordinated processing process is performed by the coordinated cells for the shared data. After the data, the processed data is sent to the UE, and the transparent transmission of the downlink cooperation of the data is realized.

In the first embodiment, the source data is shared between the cooperative cells, and the data amount of the source data is smaller than that of the data scrambled by the source data in the second embodiment. Therefore, compared with the first embodiment, In the embodiment 2 solution, the interface bandwidth requirement for transmitting data is lower, and the transmission efficiency is higher, and the embodiment 1 solution is more flexible from the perspective of HARQ; however, since the embodiment 1 solution requires other than the serving cell The cooperating cell needs to encode and scramble the source data. Therefore, compared with the solution of the embodiment 2, part of the computing resources of other cooperating cells are occupied, that is, the solution of the embodiment 2 is compared with the solution of the embodiment 1 and the other cooperating cells. Computing resources are less demanding and the processing of shared data is more efficient.

The foregoing Embodiment 1 and Embodiment 2 solutions have advantages and disadvantages, and can be selected according to specific application scenarios. Example 3:

For the control information required for processing the data before transmitting the data to the UE in Embodiment 1 and Embodiment 2, for example, performing channel coding, scrambling, modulating, generating a demodulation reference signal DM-RS, precoding The control information required for mapping with the physical resource may be sent to each coordinated cell before the data is sent to the UE. The third embodiment provides a method for transmitting the cooperative control information, and the foregoing control information is sent to each coordinated cell, including :

Determining the cooperative control information required to process and transmit the data before transmitting the data to the UE;

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

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. The base station is not integrated in any of the coordinated cells, but is independently set 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. 5, the method includes:

In step S501, in the third embodiment, for the control information specifically included in the cooperation control information, according to 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;

The coordinated control information that is sent to the serving cell to which the UE belongs includes: modulation and coding scheme indication information, DM-RS sequence indication information, precoding indication information, and resources, when the data to be processed is the data that is scrambled and processed by the source data. Allocation plan indication information; sent to other than the service cell The cooperation control information of each coordinated cell includes: 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, the modulation and coding scheme indication information is used to encode and modulate the data, and the DM-RS sequence indication information is used to generate a DM-RS sequence, and the precoding indication information is used for the data. Precoding with the DM-RS sequence, the resource allocation scheme indication information is used to indicate the physical resources of the transmission data and the DM-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 and coding mode indication information and a transmission fast-to-codeword mapping identifier;

The modulation scheme indication information includes: a modulation mode indication information and a transmission fast arrival 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: the coordinated control information sent by different coordinated cells is different, and the difference is only that the precoding coefficients are different, that is, the cooperative control information includes only the coordinated cell pair that receives the cooperative control information. The precoding coefficient should be.

In the third 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 used in the third embodiment. , 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 third embodiment, the number of transport blocks used by the serving cell may be sent to the CoMP processing device by the serving cell, or the determined q-value information may be directly sent to the CoMP processing device 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: since the resource allocation scheme indication information includes resource allocation type identifier, resource frequency domain location information, and resource time domain location information, each collaboration needs to be referred to when determining The current resource usage of the cell, therefore, each coordinated cell needs to transmit its own resource usage information to the CoMP processing device, and the CoMP processing device determines the data according to the set scheduling algorithm.

Precoding coefficient: Since the precoding coefficients used by different coordinated cells are different, each coordinated 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 S502: 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 word 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, For example, channel state information is determined using a setting algorithm.

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

Step S503: 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 are 0 and 1, respectively, 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 coefficients carried by the subfield may include precoding coefficients used by all the coordinated cells, or may only include cooperation for receiving the cooperative control information. The precoding coefficient used by the cell, preferably, in order to reduce the amount of cooperative control information, the latter method is employed.

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 and processed 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 further necessary to characterize the scrambling indication information, that is, it is not necessary to characterize the q value information of the corresponding codeword 0 or 1.

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 third 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 3, the distribution of the control parameters required for processing the data between the cooperative cells is realized.

Example 4:

Based on the same inventive concept, according to the data sharing method provided by the foregoing embodiment of the present invention, the fourth embodiment of the present invention further provides a data sharing device in a serving cell, and a schematic structural diagram thereof is shown in FIG.

a determining unit 601, configured to determine, by the serving cell, that the user equipment UE needs to perform downlink coordinated multi-point transmission data;

The first sending unit 602 is configured to transmit the determined data to each cooperation cell of the serving cell.

Preferably, the first sending unit 602 is further configured to transmit the radio network temporary identification number RNTI of the UE to each coordinated cell.

Preferably, the method further includes:

The first processing unit 603 is configured to determine that the serving cell has jurisdiction over the UE and needs to perform downlink cooperation. After the data is transmitted, the data is channel-encoded to obtain the encoded data; the encoded data is scrambled to obtain scrambled data;

The first sending unit is specifically configured to transmit the scrambled data to each coordinated cell of the serving cell.

Example 5

Based on the same inventive concept, the data transmission method according to the foregoing embodiment of the present invention, correspondingly, the embodiment 5 of the present invention further provides a data transmission device in a coordinated cell, and the schematic structural diagram thereof is as shown in FIG.

The receiving unit 701 is configured to receive data sent by the serving cell to which the user equipment UE belongs, and the second processing unit 702 is configured to process the data.

The second sending unit 703 is configured to send the processed data to the UE.

Preferably, the second processing unit 702 is specifically configured to perform channel coding on the data to obtain encoded data; perform scrambling on the encoded data to obtain scrambled data; and perform scrambling on the data. The latter data is modulated to obtain modulated data; and a demodulation reference signal DM-RS sequence is generated; and the modulated data and the DM-RS sequence are precoded to obtain precoded data and precoded DM-RS sequence.

Preferably, the receiving unit 701 is further configured to receive a radio network temporary identification number RNTI of the UE that is sent by the serving cell;

The second processing unit 702 is specifically configured to generate a scrambling sequence according to the physical identification number PCI of the serving cell, the resource time domain location information, the RNTI of the UE, and the q value information of the corresponding codeword 0 or 1. And scrambling the encoded data using the scrambling sequence to obtain scrambled data.

Preferably, the second processing unit 702 is specifically configured to: modulate the data to obtain modulated data; and generate a DM-RS sequence; and pre-process the modulated data and the DM-RS sequence Encoding, obtaining pre-encoded data and pre-coded DM-RS sequences.

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; and send the pre-coded data to the UE by using the mapped physical resource. Precoded DM-RS sequence. Example 6

Based on the same inventive concept, the data sharing and sending method according to the foregoing embodiment of the present invention, correspondingly, the sixth embodiment of the present invention further provides a data sending system, and a schematic structural diagram thereof is shown in FIG. 8 , which specifically includes: a serving cell The data sharing device 801 and the data transmitting device 802 in each coordinated cell performing downlink coordinated multipoint transmission with the serving cell, where:

The data sharing device 801 is configured to determine data that is required by the UE to perform downlink coordinated multipoint transmission; and transmit the determined data to the data transmitting device 802 of each coordinated cell; the data sending device 802 And for receiving data sent by the data sharing device 801; processing the data; and transmitting the processed data to the UE.

In summary, the solution provided by the embodiment of the present invention includes: the serving cell determines data that is required by the UE to perform downlink coordinated multi-point transmission; and transmits the determined data to each coordinated cell of the serving cell. The method further includes: each coordinated cell that performs downlink coordinated multi-point transmission with the serving cell to which the UE belongs receives the data sent by the serving cell; processes the received data; and sends the processed data to the UE. With the solution provided by the embodiment of the present invention, the data sent to the UE is shared among the cooperative cells, and the transparent transmission of the downlink cooperation of the data is realized. The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A data sharing method, comprising:

The serving cell determines data that it needs to perform downlink coordinated multi-point transmission for the user equipment UE;

The method according to claim 1, wherein when the determined data is transmitted to each coordinated cell of the serving cell, the method further includes:

Transmitting, by the UE, a radio network temporary identification number RNTI to each coordinated cell.

The method according to claim 1, wherein after the serving cell determines the data of the UE that needs to perform downlink coordinated multipoint transmission, the method further includes:

The serving cell performs channel coding on the data to obtain encoded data.

Scrambling the encoded data to obtain scrambled data;

Transmitting the determined data to each coordinated cell of the serving cell, specifically:

The scrambled data is transmitted to each coordinated cell of the serving cell.

4. A data transmission method, comprising:

Processing the data; and

The processed data is transmitted to the UE.

The method according to claim 4, wherein the processing the data comprises:

Channel coding the data to obtain encoded data;

Scrambling the encoded data to obtain scrambled data;

Modulating the scrambled data to obtain modulated data;

Generating a demodulation reference signal DM-RS sequence; The modulated data and the DM-RS sequence are precoded to obtain precoded data and a precoded DM-RS sequence.

The method according to claim 5, wherein when the coordinated cell receives the data sent by the serving cell, the method further includes:

Receiving a radio network temporary identification number RNTI of the UE sent by the serving cell;

The scrambled data is scrambled to obtain scrambled data, including:

Generating a scrambling sequence according to the physical identification number PCI of the serving cell, the resource time domain location information, the RNTI of the UE, and the q value information of the corresponding codeword 0 or 1;

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

The method according to claim 4, wherein the processing the data comprises:

Modulating the data to obtain modulated data;

Generating a DM-RS sequence;

The modulated data and the DM-RS sequence are precoded to obtain precoded data and a precoded DM-RS sequence.

The method according to any one of claims 4-7, wherein the sending the processed data to the UE comprises:

Physical resource mapping is performed on the pre-coded data and the pre-coded DM-RS sequence; the pre-coded data and the pre-coded DM-RS sequence are transmitted to the UE using the mapped physical resources.

A data sharing device in a serving cell, comprising:

And a first sending unit, configured to transmit the determined data to each coordinated cell of the serving cell.

The device according to claim 9, wherein the first sending unit is further configured to: Transmitting, by the UE, a radio network temporary identification number RNTI to each coordinated cell.

The device according to claim 9, further comprising:

a first processing unit, configured to determine, after the serving cell, the data of the UE that needs to perform downlink coordinated multi-point transmission, perform channel coding on the data to obtain coded data;

Scrambling the encoded data to obtain scrambled data;

12. A data transmitting apparatus in a coordinated cell, comprising:

a receiving unit, configured to receive data sent by a serving cell to which the user equipment UE belongs; and a second processing unit, configured to process the data;

And a second sending unit, configured to send the processed data to the UE.

The apparatus according to claim 12, wherein the second processing unit is specifically configured to perform channel coding on the data to obtain encoded data; and perform scrambling on the encoded data to obtain Scrambled data; and modulating the scrambled data to obtain modulated data; and generating a demodulation reference signal DM-RS sequence; and precoding the modulated data and the DM-RS sequence, The precoded data and the precoded DM-RS sequence are obtained.

The apparatus according to claim 13, wherein the receiving unit is further configured to receive a radio network temporary identification number RNTI of the UE sent by the serving cell;

The second processing unit is configured to generate a scrambling sequence according to the physical identification number PCI of the serving cell, the resource time domain location information, the RNTI of the UE, and the q value information of the corresponding codeword 0 or 1. And scrambling the encoded data using the scrambling sequence to obtain scrambled data.

The apparatus according to claim 12, wherein the second processing unit is specifically configured to modulate the data to obtain modulated data; and generate a DM-RS sequence; The data and the DM-RS sequence are precoded to obtain precoded data and precoded DM-RS sequences.

The apparatus according to any one of claims 12-15, wherein the second sending unit is specifically configured to perform physical resource mapping on the pre-coded data and the pre-coded DM-RS sequence; The precoded data and the precoded DM-RS sequence are transmitted to the UE using the mapped physical resources.

A data transmission system, comprising: a data sharing device in a serving cell; and a data transmitting device in each coordinated cell that performs downlink coordinated multipoint transmission with the serving cell, wherein:

The data sharing device is configured to determine data that is required by the user equipment UE to perform downlink coordinated multipoint transmission; and transmit the determined data to the data sending device in each coordinated cell; a transmitting device, configured to receive data sent by the data sharing device; process the data; and send the processed data to the UE.