WO2014201644A1

WO2014201644A1 - Interference coordination method and device

Info

Publication number: WO2014201644A1
Application number: PCT/CN2013/077490
Authority: WO
Inventors: 吴海; 吴作敏; 张宁波
Original assignee: 华为技术有限公司
Priority date: 2013-06-19
Filing date: 2013-06-19
Publication date: 2014-12-24
Also published as: CN104995975B; CN104995975A

Abstract

Provided are an interference coordination method and device, which relate to the technical field of communications and effectively reduce more inter-cell and intra-cell interference in the process of data transmission. The method specifically comprises: a first user equipment acquiring a first mapping relation; receiving a sequence number of a demodulation reference signal sent by a first base station; receiving downlink control information sent by the first base station; detecting the downlink control information and obtaining a channel indication value; judging the number of code blocks according to the downlink control information; when the number of the code blocks is one, detecting the downlink control information and obtaining a new data indication value of a second code block; when the new data indication value indicates to use a demodulation reference signal scrambling sequence with a defined length, performing channel estimation using a demodulation reference signal scrambling sequence with a pre-set length according to the channel indication value, the first mapping relation and the sequence number of the demodulation reference signal; and performing demodulation and decoding on transmission data according to a channel estimation value. The present invention is used in information transmission.

Description

Method and device for interference coordination

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for interference coordination. Background technique

The Long Term Evolution (LTE) project is an evolution of the Third Generation Telecommunication (3G) system. It improves and enhances the 3G air access technology, using Orthogonal Frequency Division. Orthogonal Frequency Division Multiplexing (OFDM) and Multi-Piece and Multiple Output (MIMO) are the only standards for the evolution of wireless networks in LTE systems. In the LTE system, when the base station needs to send data to the user, it sends downlink control information (Downlink Control Information, DCI) and data to the user through the PDCCH channel and the PDSCH channel. The DCI carries information necessary for demodulating data in the Physical Downlink Shared Channel (PDSCH), such as modulation and coding methods, resource allocation locations, and the like.

LTE defines a variety of transmission mode common downlink data transmission. First, the base station configures the current UE in which transmission mode by using high layer signaling. When scheduling, the base station can select one of the DCI formats in the transmission mode on the PDCCH channel. In this case, two possible DCIs need to be blindly detected on the PDCCH channel, so that the information of the data on the PDSCH is further demodulated by the detected DCI.

In the prior art, the ME9 is generally based on the DCI format 2C and the TM 10 based on the DCI format 2D corresponding transmission mode. For the PD SCH, each layer can transmit up to 8 layers of data, each layer of data. The transmissions correspond to one antenna port. Demodulation Reference Signal (DMRS) pilots are present in each data resource block for channel estimation and demodulation of data. However, since the DMRS pilots of the cells occupy the same resource location, when channel estimation is performed on the antenna port corresponding to a certain layer of a certain UE, the neighboring cell, the neighboring user of the local cell, or the antenna of other layers of the user may be received. Interference of the port, in the prior art, the method of orthogonally using the antenna port is adopted to avoid interference generated during channel estimation. However, the method for avoiding interference in the prior art is applicable to only two users or two cells in avoiding interference between the neighboring cell and the neighboring user of the local cell, and the interference that can be circumvented is limited. Summary of the invention

Embodiments of the present invention provide a method and apparatus for interference coordination, which effectively reduces interference between more cells and cells in a data transmission process.

In order to achieve the above object, embodiments of the present invention use the following technical solutions:

In a first aspect, a method for interference coordination is provided, including:

The first user equipment acquires a first mapping relationship, where the first mapping relationship is a correspondence between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; the transcoding identifier is used to indicate demodulation The serial number of the reference signal;

Receiving a sequence number of the demodulation reference signal sent by the first base station;

And receiving, by the first base station, the downlink control information, where the downlink control information includes: information of the first code block and information of the second code block;

Detecting the downlink control information, and obtaining the channel indication value;

Determining the number of code blocks according to the downlink control information;

When the number of the code blocks is one, detecting the downlink control information to obtain a new data indication value of the second code block;

When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, using a preset length solution according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal The reference signal scrambling code sequence is used for channel estimation; and the transmission data is demodulated and decoded according to the channel estimation value.

In a first possible implementation manner, in combination with the first aspect, the acquiring, by the first user equipment, the first mapping relationship includes:

Obtaining the first mapping relationship according to the scheduling indication information. In a second possible implementation manner, in combination with the first aspect or the first possible implementation manner, the method further includes:

When the number of the code blocks is two, the currently used antenna port and the transcoding identifier are obtained according to the downlink control information and the first mapping relationship;

Performing channel estimation according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal;

The transmission data is demodulated and decoded according to a channel estimation value.

In a third possible implementation manner, in combination with the first aspect or any one of the foregoing possible implementation manners, the using, according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal, The length of the demodulation reference signal scrambling sequence is used for channel estimation, including:

And when the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is used, acquiring the currently used antenna port and the transcoding identifier according to the channel indication value and the first mapping relationship;

And performing channel estimation according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal by using a preset length demodulation reference signal scrambling code sequence.

In a fourth possible implementation, in combination with the third possible implementation manner, the demodulation reference of the preset length is used according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal. Before performing signal estimation on the signal scrambling sequence, the method further includes: setting a resource location in the currently used antenna port to not transmit transmission data at a resource location that is the same as a resource location in another antenna port of the currently used antenna port; .

In a fifth possible implementation manner, in combination with the third possible implementation manner or the fourth possible implementation manner, the method further includes:

And when the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is not used, acquiring the currently used antenna port and the transcoding identifier according to the downlink control information and the first mapping relationship;

Performing channel estimation according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal; The transmission data is demodulated and decoded according to a channel estimation value.

In a sixth possible implementation, in combination with the first aspect or any of the possible implementations described above,

The first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port, a data stream layer number, and a turn corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is not used. The code identifier and the new data of the second code block indicate an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, a data stream layer number and a transcoding identifier, and two channel blocks, the channel indication The antenna port corresponding to the value, the number of data stream layers, and the transcoding identifier; wherein the first mapping relationship is represented in the form of a mapping table.

In a seventh possible implementation manner, in combination with the sixth possible implementation manner, the new data of the second code block is indicated as an antenna port corresponding to a channel indication value when a demodulation reference signal scrambling code sequence of a limited length is used. Including: Corresponding resource ports with the same resource location or all antenna ports.

In a second aspect, a method for interference coordination is provided, including:

The first base station acquires a first mapping relationship, where the first mapping relationship is a mapping relationship between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; the transcoding identifier is used to indicate a demodulation reference. The serial number of the signal;

Receiving, by the second base station, the first information, where the first information includes: but not limited to: an antenna port, a sequence number of the demodulation reference signal, and a subframe set; and the subframe set user indicates the any second base station The time at which the data was sent;

Obtaining a second mapping relationship according to the first information and the first mapping relationship, where the second mapping relationship is a mapping relationship between a cell identifier, an antenna port, a sequence number of a demodulation reference signal, and a subframe mode;

Sending a sequence number of the demodulation reference signal to the first user equipment;

Sending downlink control information to the first user equipment, so that the first user equipment performs channel estimation on the transmission data according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal, to obtain No interference signal.

In the first possible implementation, in combination with the first aspect, The first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port, a data stream layer number, and a turn corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is not used. The code identifier and the new data of the second code block indicate an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, a data stream layer number and a transcoding identifier, and two channel blocks, the channel indication The antenna port corresponding to the value, the number of data stream layers, and the transcoding identifier; wherein the first mapping relationship is represented in the form of a mapping table.

In a second possible implementation manner, in combination with the first possible implementation manner, the new data of the second code block is indicated as an antenna port corresponding to a channel indication value when a demodulation reference signal scrambling code sequence of a limited length is used. Including: Corresponding resource ports with the same resource location or all antenna ports.

In a third possible implementation, in combination with the second aspect,

The sequence numbers of all demodulation reference signals in the second mapping relationship are the same.

In a third aspect, a first user equipment is provided, including:

a first acquiring unit, configured to acquire a first mapping relationship, where the first mapping relationship is a correspondence between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; Instructing a sequence number of the demodulation reference signal;

a receiving unit, configured to receive a sequence number of the demodulation reference signal sent by the first base station, where the receiving unit is further configured to receive downlink control information that is sent by the first base station, where the downlink control information includes: Information of the first code block and information of the second code block;

The first obtaining unit is further configured to detect the downlink control information, and obtain the channel indication value;

a determining unit, configured to determine, according to the downlink control information, a number of code blocks, where the first processing unit is configured to: when the number of the code blocks is one, detect the downlink control information to obtain a second code block New data indication value;

The first processing unit is further configured to: when the new data indication value indicates that a demodulation reference signal scrambling code sequence of a limited length is used, according to the channel indication value, the first mapping relationship, and the demodulation reference The serial number of the signal, using a preset length demodulation reference letter Noisy code sequence for channel estimation;

The first processing unit is further configured to perform demodulation and decoding on the transmission data according to the channel estimation value.

In a first possible implementation, in combination with the third aspect, the first acquiring unit is specifically configured to:

Obtaining the first mapping relationship according to the scheduling indication information.

In a second possible implementation manner, in combination with the third aspect or the first possible implementation manner, the first user equipment further includes:

a second acquiring unit, configured to acquire, when the number of the code blocks is two, an antenna port and a transcoding identifier that are currently used according to the downlink control information and the first mapping relationship;

The second processing unit is further configured to perform channel estimation according to the antenna port, the transcoding identifier, and a sequence number of the demodulation reference signal;

The second processing unit is further configured to perform demodulation and decoding on the transmission data according to a channel estimation value.

In a third possible implementation, in combination with the third aspect or any of the foregoing possible implementation manners, the first processing unit includes:

And acquiring, by the subunit, the currently used antenna port and the transcoding identifier according to the channel indication value and the first mapping relationship when the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is used. ;

And a processing subunit, configured to perform channel estimation by using a preset length demodulation reference signal scrambling code sequence according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

In a fourth possible implementation, in combination with the third possible implementation manner, the first user equipment further includes:

And a setting unit, configured to not transmit the transmission data on the resource location in the currently used antenna port and the resource location in the other antenna port except the currently used antenna port.

In a fifth possible implementation, in combination with a third possible implementation or The first user equipment further includes:

a third acquiring unit, configured to: when the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is not used, obtain the currently used antenna port and the rotation according to the downlink control information and the first mapping relationship Code identification

a third processing unit, configured to perform channel estimation according to the antenna port, the transcoding identifier, and a sequence number of the demodulation reference signal;

The third processing unit is further configured to perform demodulation and decoding on the transmission data according to a channel estimation value.

In a sixth possible implementation, in combination with the third aspect or any of the possible implementations described above,

In a fourth aspect, a first base station is provided, including:

An acquiring unit, configured to obtain a first mapping relationship, where the first mapping relationship is a mapping relationship between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; the transcoding identifier is used to indicate a solution Adjust the serial number of the reference signal;

a receiving unit, configured to receive first information sent by any second base station, where the first information includes, but is not limited to: an antenna port, a sequence number of the demodulation reference signal, and a subframe set; the subframe set user indicates the a time at which the second base station sends data; the acquiring unit is further configured to: according to the first information and the first mapping relationship, Obtaining a second mapping relationship, where the second mapping relationship is a mapping relationship between a cell identifier, an antenna port, a sequence number of a demodulation reference signal, and a subframe mode;

a sending unit, configured to send the sequence number of the demodulation reference signal to the first user equipment, where the sending unit is further configured to send downlink control information to the first user equipment, so that the first user equipment is configured according to the The first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal perform channel estimation on the transmission data to obtain an interference-free signal.

In a first possible implementation, in combination with the fourth aspect,

In a third possible implementation, in combination with the fourth aspect,

A fifth aspect provides a first user equipment, including: at least one processor, a memory, a communication interface, and a bus, wherein the at least one processor, the memory, and the communication interface are connected by a bus and complete communication with each other, the memory Used to store program code, where:

The processor is configured to call program code in the memory to perform the following operations:

Obtaining a first mapping relationship by using the at least one communication interface, where the first mapping relationship is between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier a mapping relationship; the transcoding identifier is used to indicate a sequence number of the demodulation reference signal; and the sequence number of the demodulation reference signal sent by the first base station is received by the at least one communication interface;

And receiving, by the at least one communication interface, downlink control information that is sent by the first base station, where the downlink control information includes: information of a first code block and information of a second code block;

In a first possible implementation, in combination with the fifth aspect, the processor is specifically configured to:

Obtaining the first mapping relationship by using the at least one communication interface according to the scheduling indication information.

In a second possible implementation manner, in combination with the fifth aspect or the first possible implementation manner, the processor is further configured to:

In a third possible implementation, in combination with the fifth aspect or any of the foregoing possible implementation manners, the processor is specifically configured to:

When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, acquiring the currently used day according to the channel indication value and the first mapping relationship Line port and transcoding identifier;

In a fourth possible implementation, in combination with the third possible implementation, the processor is further configured to:

The transmission data is not transmitted at a resource location in which the resource location in the currently used antenna port is the same as the resource location in the other antenna ports of the currently used antenna port.

In a fifth possible implementation, in combination with the third possible implementation or the fourth possible implementation, the processor is further configured to:

In a sixth possible implementation, in combination with the fifth aspect or any of the foregoing possible implementations,

In a seventh possible implementation manner, in combination with the sixth possible implementation manner, the new data of the second code block is indicated as an antenna port corresponding to a channel indication value when a demodulation reference signal scrambling code sequence of a limited length is used. Including: Corresponding resource ports with the same resource location or all antenna ports. According to a sixth aspect, a first base station is provided, including: at least one processor, a memory, a communication interface, and a bus, wherein the at least one processor, the memory, and the communication interface are connected by a bus and complete communication with each other, where the memory is used by For storing the program code, its towel:

Obtaining, by the at least one communication interface, a first mapping relationship, where the first mapping relationship is a mapping relationship between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; Instructing a sequence number of the demodulation reference signal;

Receiving, by the at least one communication interface, first information sent by any second base station; where the first information includes but is not limited to: an antenna port, a sequence number of a demodulation reference signal, and a subframe set; the subframe set user indication The time at which any of the second base stations transmits data;

And obtaining, according to the first information and the first mapping relationship, a second mapping relationship by using the at least one communication interface, where the second mapping relationship is a cell identifier, an antenna port, a sequence number of the demodulation reference signal, and a subframe. The mapping relationship between modes;

Transmitting, by the at least one communication interface, a sequence number of the demodulation reference signal to a first user equipment;

Transmitting the downlink control information to the first user equipment by using the at least one communication interface, so that the first user equipment is configured according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal. The data is transmitted for channel estimation to obtain an interference-free signal.

In a first possible implementation, in combination with the sixth aspect,

The first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port, a data stream layer number, and a turn corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is not used. The code identifier and the new data of the second code block indicate an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, a data stream layer number and a transcoding identifier, and two channel blocks, the channel indication An antenna port, a data stream layer number, and a transcoding identifier corresponding to the value; wherein the first mapping relationship is mapped The form of the table is expressed.

In a third possible implementation, in combination with the fifth aspect,

A method and apparatus for interference coordination provided by an embodiment of the present invention, by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier, using a preset length demodulation reference signal scrambling code sequence The transmission data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flow chart of a method for interference coordination according to an embodiment of the present invention;

2 is a schematic flow chart of another method for interference coordination according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of still another method for interference coordination according to an embodiment of the present invention; FIG.

FIG. 4 is a schematic flowchart of still another method for interference coordination according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first user equipment according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another first user equipment according to an embodiment of the present invention. Figure

FIG. 7 is a schematic structural diagram of still another first user equipment according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of still another first user equipment according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a first base station according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of a first user equipment according to another embodiment of the present invention;

FIG. 1 is a schematic structural diagram of another first base station according to an embodiment of the present invention; FIG. 12 is a schematic structural diagram of a system for interference coordination according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all 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.

Embodiments of the present invention provide a method for interference coordination, as shown in FIG. 1, including the following steps:

101. The first user equipment acquires a first mapping relationship.

The first mapping relationship is a correspondence between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier. The transcoding identifier is used to indicate a sequence number of the demodulation reference signal.

102. The first user equipment receives a sequence number of the demodulation reference signal sent by the first base station.

103. The first user equipment receives downlink control information sent by the first base station.

The downlink control information includes: information of the first code block and information of the second code block.

104. The first user equipment detects downlink control information, and obtains a channel indication value.

105. The first user equipment determines, according to the downlink control information, the number of the code blocks. 106. When the number of the code blocks is one, the first user equipment detects the downlink control information to obtain a new data indication value of the second code block.

107. When the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is used, the first user equipment uses the preset length demodulation reference according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal. The signal scrambling sequence performs channel estimation.

108. The first user equipment demodulates and decodes the transmission data according to the channel estimation value. The method for interference coordination provided by the embodiment of the present invention uses a preset length demodulation reference signal scrambling code sequence pair transmission by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. The data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. Embodiments of the present invention provide a method for interference coordination, as shown in FIG. 2, including the following steps:

201. The first base station acquires a first mapping relationship.

The first mapping relationship is a mapping relationship between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier. The transcoding identifier is used to indicate a sequence number of the demodulation reference signal.

202. The first base station receives the first information sent by any second base station.

The first information includes but is not limited to: an antenna port, a sequence number of the demodulation reference signal, and a subframe set; and the subframe set user indicates a time when any second base station sends data.

203. The first base station obtains a second mapping relationship according to the first information and the first mapping relationship.

The second mapping relationship is a mapping relationship between the cell identifier, the antenna port, the sequence number of the demodulation reference signal, and the subframe mode.

204. The first base station sends a sequence number of the demodulation reference signal to the first user equipment.

205. The first base station sends the downlink control information to the first user equipment, so that the first user equipment performs channel estimation on the transmission data according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal, to obtain an interference-free signal.

The method for interference coordination provided by the embodiment of the present invention, by redefining the mapping relationship between the channel indication value and the antenna port, the number of data stream layers, and the transcoding identifier, The demodulation reference signal scrambling sequence of the length is used to demodulate and decode the transmission data, which effectively reduces interference between more cells and cells in the data transmission process. Embodiments of the present invention provide a method for interference coordination, which is applicable to a transmission mode of

TM9 or TM 10, when the number of code blocks is one, as shown in Figure 3, the following steps are included:

301. The first base station acquires a first mapping relationship.

Specifically, the first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is not used, the number of data stream layers, and The transcoding identifier and the new data of the second code block indicate an antenna port, a data stream layer number, and a transcoding identifier corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, and the channel in the two code blocks. The antenna port, the number of data stream layers, and the transcoding identifier corresponding to the indication value; wherein, the first mapping relationship is represented in the form of a mapping table.

The new data of the second code block indicates that the antenna port corresponding to the channel indication value when using the demodulation reference signal scrambling sequence of the limited length includes: the corresponding antenna port with the same resource location or all the antenna ports.

The new data of the second code block indicates that the demodulation reference signal scrambling code sequence using the limited length can be represented by the new data indication of the second code block as 1 in the embodiment of the present invention; the new data indication of the second code block The scrambling code sequence for demodulating reference signals that does not use a defined length may be represented by a new data indication of the second code block being zero in an embodiment of the present invention. In the relationship mapping table in this embodiment, the correspondence between the channel indication value, the antenna port, the number of data stream layers, and the transcoding identifier when the new data of the second code block is 0 or 1 may be indicated.

The first mapping relationship is pre-configured by the operator on the first base station according to the actual needs of the user. Since the TM9 and TM 10 transmission modes specify that when the user is scheduled in these two transmission modes, the pilot will use one of the antenna ports 7 to 14 when performing channel estimation. Kind or several. Also, antenna ports 7, 8, 1 1 and 13 use the same resource location. Antenna ports 9, 10, 12, and 14 use the same resource location. Therefore, when the user terminal uses the antenna ports 7, 8, 1 1 and 13, the structure of the relationship mapping table indicated by the first mapping relationship can be as follows:

Of course, when the user terminal uses the antenna ports 9, 10, 12, and 14, the structure of the first mapping relationship table may also be: One code block (code block 0 active, code block 1 is inactive) two code blocks (code block 0 and code block 1 are both active)

The new data indication is 0 New data indication is 1 channel Related information Channel Related information Channel indication Related information Indication indication Value

Value

0 1 layer, antenna port 0 1 layer, antenna port 0 2 layer, antenna port 7, transcoding identifier 0 9, transcoding identifier 0 7-8, transcoding identifier 0

1 1 layer, antenna port 1 1 layer, antenna port 1 2 layer, antenna port 7, transcoding identifier 1 10, transcoding identifier 0 7-8, transcoding identifier 1

2 1 layer, antenna port 2 1 layer, antenna port 2 3 layers, antenna port 8, transcoding identifier 0 12, transcoding identifier 0 7-9, transcoding identifier 0

3 1 layer, antenna port 3 1 layer, antenna port 3 4 layers, antenna port 8, transcoding identifier 1 14, transcoding identifier 0 7- 10, transcoding identifier 0

4 2 layers, antenna port 4 1 layer, antenna port 4 5 layers, antenna port 7-8, transcoding identifier 0 9, transcoding identifier 1 7- 1 1, transcoding identifier 0

5 3 layers, antenna port 5 1 layer, antenna port 5 6 layers, antenna port 7-9, transcoding identifier 0 10, transcoding identifier 1 7- 12, transcoding identifier 0

6 4 layers, antenna port 6 1 layer, antenna port 6 7 layers, antenna port 7- 10, transcoding identifier 0 12, transcoding identifier 1 7- 13, transcoding identifier 0

7 Undefined 7 1 layer, antenna port 7 8 layers, antenna port

14. Transcoding ID 1 7- 14. Transcoding ID 0 The structure of the above two first mapping tables is applicable to the case where there are four user equipments or four cells in the system.

Optionally, the structure of the first relationship mapping table may also be as shown in the following table. At this time, it is used in the case where there are more than four user equipments or more than four cells in the system; One code block (code block 0 active, code block 1 is inactive) two code blocks (code block 0 and code block 1 are both active)

New data indication is 0 New data indication is 1

Channel related information channel related information channel finger related information indication indication value

Value

0 1 layer, antenna port 0 1 layer, antenna port 0 2 layer, antenna port 7, transcoding identifier 0 7, transcoding identifier 1 7-8, transcoding identifier 0

1 1 layer, antenna port 1 1 layer, antenna port 1 2 layer, antenna port 7, transcoding identifier 1 8 , transcoding identifier 1 7-8, transcoding identifier 1

2 1 layer, antenna port 2 1 layer, antenna port 2 3 layers, antenna port 8, transcoding identifier 0 9, transcoding identifier 1 7-9, transcoding identifier 0

3 1 layer, antenna port 3 1 layer, antenna port 3 4 layers, antenna port 8, transcoding identifier 1 10, transcoding identifier 1 7- 10, transcoding identifier 0

4 2 layers, antenna port 4 1 layer, antenna port 4 5 layers, antenna port 7-8, transcoding identifier 0 1 1, transcoding identifier 1 7- 1 1, transcoding identifier 0

5 3 layers, antenna port 5 1 layer, antenna port 5 6 layers, antenna port 7-9, transcoding identifier 0 12, transcoding identifier 1 7- 12, transcoding identifier 0

6 4 layers, antenna port 6 1 layer, antenna port 6 7 layers, antenna port 7-10, transcoding identifier 0 13, transcoding identifier 1 7- 13, transcoding identifier 0

7 Undefined 7 1 layer, antenna port 7 8 layers, antenna port

14. Transcoding ID 1 7- 14. Transcoding ID 0 After obtaining the first mapping relationship, the base station can only obtain the channel according to the obtained channel.

Get your own data stream layer, antenna port and transcoding identifier.

302. The first base station receives the first information sent by any second base station.

The first information includes but is not limited to: an antenna port, a sequence number of the demodulation reference signal, and a subframe set; and the subframe set user indicates a time when any second base station sends data. All demodulation reference signals in the second mapping relationship have the same sequence number

Specifically, the second base station may send the first information by using an X2 interface and an S1 interface. Of course, it is not limited to these two interfaces. In an actual application scenario, an appropriate interface may be selected according to specific requirements to send information.

303. The first base station obtains a second mapping relationship according to the first information and the first mapping relationship. The second mapping relationship is a mapping relationship between the cell identifier, the antenna port, the sequence number of the demodulation reference signal, and the subframe mode.

When there are four user equipments or four cells in the system, the structure of the second mapping table can be as follows:

When there are eight user equipments or four cells in the system, the structure of the second mapping table can be as follows:

Wherein, in the two second mapping relationship tables, the sequence number of the demodulation reference signal in each mapping table is only one, and the base station uses the sequence number of the same demodulation reference signal in the time specified by the subframe mode, according to the respective analysis. The antenna port schedules the user equipment corresponding to the base station. The mapping table only exemplifies that the subframe mode is 10 cycles. Of course, it is not limited thereto, and an appropriate subframe mode can be selected according to actual needs.

In the embodiment of the present invention, only the structure of the second mapping relationship is illustrated, and It is said that the second mapping relationship can only be represented in the form of a mapping table. In an actual application, an appropriate second mapping relationship structure can be selected according to the actual implementation environment.

304. The first user equipment acquires a first mapping relationship.

The first mapping relationship is a correspondence between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; and the transcoding identifier is used to indicate a sequence number of the demodulation reference signal.

Further, the step 304 includes:

The first user equipment acquires the first mapping relationship according to the scheduling indication information.

In a practical application scenario, the table structure of the first mapping relationship may be to obtain only the table structure required by itself, or to acquire all the table structures. In this case, when the first mapping relationship includes all the mapping table structures, that is, the user equipment is configured with all the mapping table structures, the first user equipment may learn which one of the first mapping tables is selected according to the scheduling indication of the first base station. The structure, that is, the scheduling indication information, may indicate that the first user equipment selects the first mapping table structure required by itself.

305. The first base station sends a sequence number of the demodulation reference signal to the first user equipment.

The first base station may configure the sequence number of the demodulation reference signal to the first user equipment by using high layer signaling or physical layer signaling. The high layer signaling is carried in a Radio Resource Control (RRC) protocol. Of course, here is just an example to illustrate that these two types of signaling can be used. In practice, suitable signaling can be selected according to a specific implementation environment.

306. The first user equipment receives a sequence number of the demodulation reference signal sent by the first base station.

307. The first base station sends the downlink control information to the first user equipment, so that the first user equipment performs channel estimation on the transmission data according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal, to obtain an interference-free signal.

308. The first user equipment receives downlink control information sent by the first base station.

Specifically, the information of the first code block may be: a modulation and coding format of the first code block, a new data indication value of the first code block, and a redundancy version of the first code block. The information of the second code block may be: a modulation and coding format of the second code block, a new data indication value of the second code block, and a redundancy version of the second code block.

309. The first user equipment detects downlink control information, and obtains a channel indication value.

310. The first user equipment determines, according to the downlink control information, the number of the code blocks.

311. When the number of the code blocks is one, the first user equipment detects the downlink control information, and obtains a new data indication value of the second code block.

When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, steps 312a to 314a are performed; when the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is not used, steps 312b to 313b are performed;

312a. The first user equipment acquires an currently used antenna port and a transcoding identifier according to the channel indication value and the first mapping relationship.

Optionally, the first user equipment sets the resource location in the currently used antenna port to not transmit the transmission data on the same resource location as the resource location in the other antenna ports of the currently used antenna port.

When the structure of the first mapping relationship obtained by the user equipment is the structure of the first mapping relationship applicable to the case where there are more than four user equipments or more than four cells in the system, step 313a is required. Execute, otherwise step 313a is not performed.

314a. The first user equipment performs channel estimation by using a preset length demodulation reference signal scrambling code sequence according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

Specifically, the preferred preset length in the embodiment of the present invention may be 4. Of course, in practice, a suitable length may be selected according to specific needs.

When there are eight user equipments or cells in the system, all user equipments or cells need to be divided into two groups, four user equipments or cells in each group, and then a demodulation reference signal of length 4 is used (Demodulation) Reference Signal, referred to as DMRS) scrambling code sequence for channel estimation.

312b: The first user equipment acquires the currently used antenna port and the transcoding identifier according to the downlink control information and the first mapping relationship.

313b: The first user equipment performs channel estimation according to the sequence number of the antenna port and the transcoding identifier demodulation reference signal. 3. The first user equipment demodulates and decodes the transmission data according to the channel estimation value. In the embodiment provided by the present invention, the subsequent operations are performed according to the new data indication value. In the present invention, only the new data indication value indicates that the demodulation reference signal scrambling code sequence using the limited length can be indicated by the new data. 1 indicates; the new data indication value indicates that the demodulation reference signal scrambling sequence without using the limited length can be represented by a new data indication value of 0. Of course, in the actual execution environment, the new data indication value may also be swapped, that is, when the new data indication value is 1, the new data indication value in the embodiment of the present invention is used to indicate that the demodulation reference signal interference of the limited length is not used. The operation at the time of the code sequence; when the new data indicates a value of 0, the operation of the new data indication value in the embodiment of the present invention is performed to indicate the use of the demodulation reference signal scrambling sequence of the limited length. During the entire implementation process, the operation corresponding to the specific new data indication value should be defined at the initial execution.

The method for interference coordination provided by the embodiment of the present invention uses a preset length demodulation reference signal scrambling code sequence pair transmission by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. The data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved. Embodiments of the present invention provide a method for interference coordination, which is applicable to a transmission mode of TM9 or TM10. When the number of code blocks is two, as shown in FIG. 4, the following steps are included:

401. The first base station acquires a first mapping relationship.

Specifically, the first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is not used, the number of data stream layers, and The transcoding identifier and the new data of the second code block indicate an antenna port, a data stream layer number, and a transcoding identifier corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, and the channel in the two code blocks. An antenna port, a data stream layer number, and a transcoding identifier corresponding to the indication value; wherein, the first mapping relationship is a mapping table The form is expressed.

402. The first base station receives the first information sent by any second base station.

403. The first base station obtains a second mapping relationship according to the first information and the first mapping relationship.

404. The first user equipment acquires a first mapping relationship.

Specifically, the step 408 includes: the first user equipment acquires the first mapping relationship according to the scheduling indication information.

When the first mapping relationship includes all the mapping table structures, that is, the user equipment is configured with all the mapping table structures, the first user equipment needs to know which first mapping relationship table structure is selected according to the indication of the first base station.

405. The first base station sends a sequence number of the demodulation reference signal to the first user equipment.

406. The first user equipment receives a sequence number of the demodulation reference signal sent by the first base station.

407. The first base station sends the downlink control information to the first user equipment, so that the first user equipment is configured according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal. Channel estimation is performed on the transmitted data to obtain an interference-free signal.

408. The first user equipment receives downlink control information sent by the first base station.

Specifically, the information of the first code block may be: a modulation and coding format of the first code block, a new data indication value of the first code block, and a redundancy version of the first code block.

The information of the second code block may be: a modulation and coding format of the second code block, a new data indication value of the second code block, and a redundancy version of the second code block.

409. The first user equipment detects downlink control information, and obtains a channel indication value.

410. The first user equipment determines, according to the downlink control information, the number of the code blocks.

When the number of the code blocks is two, the first user equipment acquires the currently used antenna port and the transcoding identifier according to the downlink control information and the first mapping relationship.

412. The first user equipment performs channel estimation according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

413. The first user equipment demodulates and decodes the transmission data according to the channel estimation value. The explanation of the related content in the embodiment is the same as that in the above embodiment, and details are not described herein again.

For the case of four or four user equipments or cells in the system, the operational steps in this embodiment are the same.

In the embodiment provided by the present invention, the subsequent operations are performed according to the new data indication value. In the present invention, only the new data indication value indicates that the demodulation reference signal scrambling code sequence using the limited length can be indicated by the new data. 1 indicates; the new data indication value indicates that the demodulation reference signal scrambling sequence without using the limited length can be represented by a new data indication value of 0. Of course, in the actual execution environment, the new data indication value may also be swapped, that is, when the new data indication value is 1, the new data indication value in the embodiment of the present invention is used to indicate that the demodulation reference signal interference of the limited length is not used. The operation at the time of the code sequence; when the new data indicates a value of 0, the operation of the new data indication value in the embodiment of the present invention is performed to indicate the use of the demodulation reference signal scrambling sequence of the limited length. During the entire implementation process, the operation corresponding to the specific new data indication value should be defined at the initial execution. The method for interference coordination provided by the embodiment of the present invention uses a preset length demodulation reference signal scrambling code sequence pair transmission by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. The data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved. An embodiment of the present invention provides a first user equipment 5, as shown in FIG. 5, including: a first obtaining unit 51, a receiving unit 52, a determining unit 53, and a first processing unit 54;

The first obtaining unit 5 1 is configured to acquire the first mapping relationship.

The receiving unit 52 is configured to receive a sequence number of the demodulation reference signal sent by the first base station. The receiving unit 52 is further configured to receive downlink control information sent by the first base station.

The information of the second code block may be: a modulation and coding format of the second code block, and a second code block The new data indicates the value and the redundancy version of the second code block.

The first obtaining unit 51 is further configured to detect downlink control information, and obtain a channel indication value. The determining unit 53 is configured to determine the number of code blocks according to the downlink control information.

The first processing unit 54 is configured to: when the number of code blocks is one, detect downlink control information to obtain a new data indication value of the second code block.

The first processing unit 54 is further configured to use a preset length according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal when the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is used. The reference signal scrambling code sequence is demodulated for channel estimation.

The first processing unit 54 is further configured to perform demodulation and decoding on the transmission data according to the channel estimation value.

The first obtaining unit 51 is specifically configured to acquire the first mapping relationship according to the scheduling indication information.

Further, referring to FIG. 6, the first user equipment further includes: a second acquiring unit 65 and a second processing unit 56, where:

The second obtaining unit 55 is configured to obtain, when the number of the code blocks is two, the currently used antenna port and the transcoding identifier according to the downlink control information and the first mapping relationship.

The second processing unit 56 is further configured to perform channel estimation according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

The second processing unit 56 is further configured to perform demodulation and decoding on the transmission data according to the channel estimation value.

Further, referring to FIG. 7, the first processing unit 54 includes: an obtaining subunit 541 and a processing subunit 542, where:

The obtaining sub-unit 541 is configured to obtain the currently used antenna port and transcoding identifier according to the channel indication value and the first mapping relationship when the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is used.

The processing sub-unit 542 is configured to perform channel estimation by using a preset length demodulation reference signal scrambling code sequence according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

Further, optionally, referring to FIG. 7, the first user equipment further includes: Unit 57, wherein:

The setting unit 57 is configured to not transmit the transmission data on the resource location in the currently used antenna port and the resource location in the other antenna port except the currently used antenna port.

Optionally, referring to FIG. 8, the first user equipment further includes: a third obtaining unit 68 and a third processing unit 59, where:

The third obtaining unit 58 is configured to: when the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is not used, obtain the currently used antenna port and the transcoding identifier according to the downlink control information and the first mapping relationship.

The third processing unit 59 is configured to perform channel estimation according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

The third processing unit 59 is further configured to perform demodulation and decoding on the transmission data according to the channel estimation value.

Specifically, the new data of the second code block indicates that the demodulation reference signal scrambling code sequence using the limited length may be represented by the new data indication of the second code block as 1 in the embodiment of the present invention; The new data indicates that the demodulation reference signal scrambling sequence that does not use the defined length may be represented by the new data indication of the second code block being zero in the embodiment of the present invention. In the relationship mapping table in this embodiment, the correspondence between the channel indication value, the antenna port, the number of data stream layers, and the transcoding identifier when the new data of the second code block is 0 or 1 may be used. Of course, the new data indication value of the second code block is merely exemplified here to indicate that the demodulation reference signal scrambling code sequence using the limited length can be represented by the new data indication value of 1, and the same new data indication value indicates that the limited length is not used. The demodulation reference signal scrambling sequence can be represented by the new data indicating value of 0, which is not specifically limited. The new data indicating value can also be interchanged to perform corresponding operations when applying specific numbers.

The first user equipment provided by the embodiment of the present invention uses a preset length of demodulation reference signal scrambling code sequence pair transmission by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. The data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved. An embodiment of the present invention provides a first base station 6, which is shown in FIG. 9, and includes: an obtaining unit 61, a receiving unit 62, and a sending unit 63, where:

The obtaining unit 61 is configured to acquire a first mapping relationship.

The first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port, a data stream layer number, and a transcoding identifier corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is not used. And the new data of the second code block is indicated as an antenna port, a data stream layer number, and a transcoding identifier corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, and the channel indication value is corresponding to the two code blocks. The antenna port, the number of data stream layers, and the transcoding identifier; wherein the first mapping relationship is represented in the form of a mapping table.

The receiving unit 62 is configured to receive first information sent by any second base station.

The obtaining unit 61 is further configured to obtain a second mapping relationship according to the first information and the first mapping relationship.

The sending unit 63 is configured to send a sequence number of the demodulation reference signal to the first user equipment. The sending unit 63 is further configured to send the downlink control information to the first user equipment, so that the first user equipment performs channel estimation on the transmission data according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal, to obtain an interference-free signal. .

Specifically, the new data of the second code block is indicated to use a demodulation reference signal of a limited length. The scrambling code sequence may be represented by the new data indication of the second code block as 1 in the embodiment of the present invention; the new data of the second code block is indicated as not using the delimited reference signal scrambling code sequence of the limited length in the present invention. The embodiment may be represented by a new data indication of the second code block being zero. In the relationship mapping table in this embodiment, the correspondence between the channel indication value, the antenna port, the number of data stream layers, and the transcoding identifier when the new data of the second code block is 0 or 1 may be indicated. Of course, the new data indication value of the second code block is merely exemplified here to indicate that the demodulation reference signal scrambling code sequence using the limited length can be represented by the new data indication value of 1, and the same new data indication value indicates that the limited length is not used. The demodulation reference signal scrambling sequence can be represented by the new data indicating value of 0, which is not specifically limited. The new data indicating value can also be interchanged to perform corresponding operations when applying specific numbers.

The first base station provided by the embodiment of the present invention uses a preset length demodulation reference signal scrambling code sequence to transmit data by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. Demodulation and decoding are performed, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved. An embodiment of the present invention provides a first user equipment 7, as shown in FIG. 10, comprising: at least one processor 71, a memory 72, a communication interface 73 and a bus 74, at least one processor 71, a memory 72, and The communication interface 73 is connected and completed by the bus 74, wherein:

The bus 74 can be an Industry Standard Architecture (I SA) bus, a P eripheral C omponent Interconnect (P CI ) bus or an extended industry standard architecture ( Extended Industry Standard) Architecture, referred to as EI SA) bus, etc. The bus 74 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 10, but it does not mean that there is only one bus or one type of bus. Its towel:

The memory 72 is for storing executable program code, the program code including computer operating instructions. Memory 72 may contain high speed RAM memory, and may also include non-easy A non-volatile memory, such as at least one disk storage device. The processor 71 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to invent the embodiments of the present invention. .

The communication interface 73 is mainly used to implement communication between the first base station and the first user equipment of this embodiment.

The processor 7 1 is also used to call the program code in the memory 72 to perform the following operations:

The first mapping relationship is obtained through at least one communication interface 73.

The sequence number of the demodulation reference signal transmitted by the first base station is received through at least one communication interface 73.

The downlink control information sent by the first base station is received through the at least one communication interface 73.

Specifically, the information of the first code block may be: a modulation and coding format of the first code block, The new data of the first code block indicates a value and a redundancy version of the first code block.

The downlink control information is detected to obtain a channel indication value.

The number of code blocks is determined according to the downlink control information.

When the number of code blocks is one, the downlink control information is detected to obtain a new data indication value of the second code block.

When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal, the demodulation reference signal scrambling code sequence of the preset length is used. Channel estimation.

The transmission data is demodulated and decoded according to the channel estimation value.

Further, the processor 7 1 is specifically configured to acquire the first mapping relationship by using the at least one communication interface 73 according to the scheduling indication information.

Optionally, the processor 73 is further configured to perform the following operations:

When the number of the code blocks is two, the currently used antenna port and the transcoding identifier are obtained according to the downlink control information and the first mapping relationship.

The channel estimation is performed based on the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

Further, the processor 73 is specifically configured to:

When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, the currently used antenna port and transcoding identifier are obtained according to the channel indication value and the first mapping relationship.

Channel estimation is performed using a preset length demodulation reference signal scrambling code sequence according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

Further, the processor 73 is further configured to set that the resource location in the currently used antenna port does not transmit the transmission data at the same resource location as the resource location in the other antenna ports of the currently used antenna port.

Further, optionally, the processor 73 is further configured to perform the following operations: When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is not used, the currently used antenna port and transcoding identifier are obtained according to the downlink control information and the first mapping relationship.

The first user equipment provided by the embodiment of the present invention uses a preset length of demodulation reference signal scrambling code sequence pair transmission by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. The data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved. An embodiment of the present invention provides a first base station 8, as shown in FIG. 11, including: at least one processor 81, a memory 82, a communication interface 83, and a bus 84, at least one processor 81, a memory 82, and a communication interface 83. Connected via bus 84 and completed communication with each other, where:

The bus 84 can be an Industry Standard Architecture (ISA) bus, and a peripheral component (Peripheral Component). Interconnect), referred to as the PCI) bus or the Extended Industry Standard Architecture (EISA) bus. The bus 84 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 1 shows only one thick line, but does not mean that there is only one bus or one type of bus. Its towel:

Memory 82 is for storing executable program code, the program code including computer operating instructions. Memory 82 may contain high speed RAM memory and may also include non-volatile memory, such as at least one disk storage device.

The processor 81 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to invent the embodiments of the present invention. .

The communication interface 83 is mainly used to implement communication between the first base station and the first user equipment of this embodiment.

The processor 8 1 is also used to call the program code in the memory 82 to perform the following operations:

The first mapping relationship is obtained through at least one communication interface 83.

The new data of the second code block indicates that the antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used includes: the corresponding antenna port or all the antenna ports with the same resource location. The first information transmitted by any of the second base stations is received by the at least one communication interface 83. The first information includes but is not limited to: an antenna port, a sequence number of the demodulation reference signal, and a subframe set; and the subframe set user indicates a time when any second base station sends data.

The second mapping relationship is obtained through the at least one communication interface 73 based on the first information and the first mapping relationship.

Specifically, the sequence numbers of all demodulation reference signals in the second mapping relationship are the same. The sequence number of the demodulation reference signal is transmitted to the first user equipment via at least one communication interface 73.

The downlink control information is sent to the first user equipment by using the at least one communication interface 73, so that the first user equipment performs channel estimation on the transmission data according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal, to obtain an interference-free signal.

The first base station provided by the embodiment of the present invention uses a preset length demodulation reference signal scrambling code sequence to transmit data by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. Demodulation and decoding are performed, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved. An embodiment of the present invention provides a system for interference coordination. Referring to FIG. 12, the method includes: a first base station, a first user equipment b, and a second base station c, where:

The first base station a is the first base station in the embodiment corresponding to FIG. 5; the first user equipment b is any first user equipment in the embodiment corresponding to FIG. 6-9.

Or, the first base station a is the first base station in the embodiment corresponding to FIG. 10; the first user equipment b is the first user equipment in the embodiment corresponding to FIG.

The second base station c is configured to send the first information to the first base station a.

The interference coordination system provided by the embodiment of the present invention uses a preset length demodulation reference signal scrambling sequence pair transmission by redefining a mapping relationship between a channel indication value and an antenna port, a data stream layer number, and a transcoding identifier. The data is demodulated and decoded, which effectively reduces interference between more cells and cells in the data transmission process. In turn, the performance of the system can be improved.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above functional assignments may be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Can be based on reality It is necessary to select some or all of the units to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Claim

A method for interference coordination, characterized in that it comprises:

When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, using a preset length solution according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal Adjusting the reference signal scrambling sequence to perform channel estimation;

2. The method according to claim 1, wherein the acquiring, by the first user equipment, the first mapping relationship comprises:

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

The method according to any one of claims 1 to 3, wherein the method uses a preset length according to the channel indication value, the first mapping relationship, and the sequence number of the demodulation reference signal. Adjusting the reference signal scrambling sequence for channel estimation, including: When the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, acquiring the currently used antenna port and the transcoding identifier according to the channel indication value and the first mapping relationship;

And performing channel estimation by using a preset length of the demodulation reference signal scrambling code sequence according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal.

The method according to claim 4, wherein the demodulating reference signal scrambling sequence sequence of a preset length is used according to the antenna port, the transcoding identifier, and the sequence number of the demodulation reference signal Before performing channel estimation, it also includes:

The method according to claim 4 or 5, wherein the method further comprises:

And when the new data indication value indicates that the demodulation reference signal scrambling sequence of the limited length is not used, acquiring the currently used antenna port and the transcoding identifier according to the downlink control information and the first mapping relationship;

7. The method according to any one of claims 1 to 6, wherein

The first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port, a data stream layer, and a corresponding channel identifier value when the demodulation reference signal scrambling code sequence of the limited length is not used. The code identifier and the new data of the second code block indicate an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, a data stream layer number and a transcoding identifier, and two channel blocks, the channel indication The antenna port corresponding to the value, the number of data stream layers, and the transcoding identifier; wherein the first mapping relationship is represented in the form of a mapping table.

8. The method of claim 7 wherein:

The new data of the second code block is indicated as using a delimited reference signal of a limited length The antenna port corresponding to the channel indication value in the code sequence includes: the corresponding antenna port or all antenna ports with the same resource location.

9. A method of interference coordination, characterized by comprising:

Receiving, by the second base station, the first information, where the first information includes: but not limited to: an antenna port, a sequence number of the demodulation reference signal, and a subframe set; and the subframe set user indicates any one of the second The time at which the base station transmits data;

Sending the downlink control information to the first user equipment, so that the first user equipment performs channel estimation on the transmission data according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal. , get no interference signal.

10. The method of claim 9 wherein:

1 1. The method of claim 10, wherein

The new data of the second code block indicates that the antenna port corresponding to the channel indication value when the demodulation reference signal scrambling sequence of the limited length is used includes: the corresponding antenna port or all the antenna ports with the same resource location.

12. The method of claim 9 wherein: The sequence numbers of all demodulation reference signals in the second mapping relationship are the same.

13. A first user equipment, comprising:

a receiving unit, configured to receive a sequence number of the demodulation reference signal sent by the first base station, where the receiving unit is further configured to receive downlink control information that is sent by the first base station, where the downlink control information includes: The information of the first code block and the information of the second code block; the first acquiring unit is further configured to detect the downlink control information, and obtain the channel indication value;

The first processing unit is further configured to: when the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used, according to the channel indication value, the first mapping relationship, and the demodulation reference The sequence number of the signal, using a preset length of the demodulation reference signal scrambling code sequence for channel estimation;

The first user equipment according to claim 13, wherein the first acquiring unit is specifically configured to:

The first user equipment according to claim 13 or 14, wherein the first user equipment further includes:

a second acquiring unit, configured to acquire, according to the downlink control information and the first mapping relationship, a currently used antenna port and a transcoding identifier when the number of the code blocks is two; And performing channel estimation according to the antenna port, the transcoding identifier, and a sequence number of the demodulation reference signal;

The second processing unit is further configured to: feed the data according to a channel estimation value Line demodulation decoding.

The first user equipment according to any one of claims 13 to 15, wherein the first processing unit comprises:

And acquiring, by the subunit, the currently used antenna port and the transcoding identifier according to the channel indication value and the first mapping relationship, when the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is used. ;

The first user equipment according to claim 16, wherein the first user equipment further includes:

And a setting unit, configured to set, that the resource location in the currently used antenna port is the same as the resource location in the other antenna port of the currently used antenna port, and the transmission data is not transmitted.

The first user equipment according to claim 16 or 17, wherein the first user equipment further includes:

a third acquiring unit, configured to: when the new data indication value indicates that the demodulation reference signal scrambling code sequence of the limited length is not used, acquire the currently used antenna port and the rotation according to the downlink control information and the first mapping relationship Code identification

The first user equipment according to any one of claims 13 to 18, wherein the first mapping relationship comprises: in a code block, new data of the second code block is indicated as not using a solution of a limited length The antenna port corresponding to the channel indication value when adjusting the reference signal scrambling sequence, the data stream layer number, and the transcoding identifier and the new data of the second code block are indicated as channel indication values when the demodulation reference signal scrambling sequence of the limited length is used. The corresponding antenna port, the number of data stream layers, and the transcoding identifier, and the number of antenna ports corresponding to the channel indication value in the two code blocks. According to the number of stream layers and the transcoding identifier; wherein the first mapping relationship is represented in the form of a mapping table.

The first user equipment according to claim 19, wherein the new data of the second code block is indicated by an antenna port corresponding to a channel indication value when a demodulation reference signal scrambling code sequence of a limited length is used. : Corresponding resource ports with the same antenna port or all antenna ports.

A first base station, comprising:

a receiving unit, configured to receive first information sent by any second base station, where the first information includes, but is not limited to: an antenna port of the second base station, a sequence number of the demodulation reference signal of the second base station, and a subframe set; The subframe set user indicates a time when the second base station sends data;

The acquiring unit is further configured to obtain a second mapping relationship according to the first information and the first mapping relationship, where the second mapping relationship is a cell identifier, an antenna port, a sequence number and a sub-demodulation reference signal. Mapping relationship between frame modes;

22. The first base station according to claim 21, wherein

The first mapping relationship includes: in a code block, the new data of the second code block indicates an antenna port, a data stream layer, and a corresponding channel identifier value when the demodulation reference signal scrambling code sequence of the limited length is not used. The code identifier and the new data of the second code block indicate an antenna port corresponding to the channel indication value when the demodulation reference signal scrambling code sequence of the limited length is used, a data stream layer number and a transcoding identifier, and two channel blocks, the channel indication The antenna port corresponding to the value, the number of data stream layers, and the transcoding identifier; wherein the first mapping relationship is in the form of a mapping table. TF.

23. The first base station according to claim 22, wherein

24. The first base station according to claim 21, wherein

25. A first user equipment, comprising: at least one processor, a memory, a communication interface, and a bus, wherein the at least one processor, the memory, and the communication interface are connected by a bus and complete communication with each other, The memory is used to store the program code, and its towel:

The processor is configured to invoke a program code in the memory, to perform the following operations: acquiring, by using the at least one communication interface, a first mapping relationship, where the first mapping relationship is a channel indication value, an antenna port, and a data Corresponding relationship between the number of stream layers and the transcoding identifier; the transcoding identifier is used to indicate the sequence number of the demodulation reference signal;

Receiving, by the at least one communication interface, a sequence number of the demodulation reference signal sent by the first base station;

Receiving the downlink control information sent by the first base station by using the at least one communication interface, where the downlink control information includes: information of the first code block and information of the second code block;

The first user equipment according to claim 25, wherein The processor is specifically used to:

Obtaining the first mapping relationship through the at least one communication interface according to the scheduling indication information.

The first user equipment according to claim 25 or 26, wherein the processor is further configured to:

The first user equipment according to any one of claims 25 to 27, wherein the processor is specifically configured to:

The first user equipment according to claim 28, wherein the processor is further configured to:

The first user equipment according to claim 28 or 29, wherein the processor is further configured to:

The first user equipment according to any one of claims 25 to 30, wherein the first mapping relationship comprises: in a code block, new data of the second code block is indicated as not using a limited length. The antenna port corresponding to the channel indication value when demodulating the reference signal scrambling sequence, the data stream layer number, and the transcoding identifier and the new data of the second code block are indicated as channel indications when the demodulation reference signal scrambling code sequence of the limited length is used. An antenna port, a data stream layer number, and a transcoding identifier corresponding to the value, and an antenna port, a data stream layer number, and a transcoding identifier corresponding to the channel indication value in the two code blocks; wherein the first mapping relationship is in a mapping table Form to represent.

The first user equipment according to claim 31, wherein the new data of the second code block is an antenna port corresponding to a channel indication value when a demodulation reference signal scrambling code sequence of a limited length is used. Including: Corresponding resource ports with the same resource location or all antenna ports.

33. A first base station, comprising: at least one processor, a memory, a communication interface, and a bus, wherein the at least one processor, the memory, and the communication interface are connected by a bus and complete communication with each other, the memory For storing the program code, wherein: the processor is configured to call the program code in the memory to: acquire the first mapping relationship by using the at least one communication interface; wherein, the first mapping relationship is a mapping relationship between a channel indication value, an antenna port, a data stream layer number, and a transcoding identifier; the transcoding identifier is used to indicate a sequence number of the demodulation reference signal;

Receiving, by the at least one communication interface, first information sent by any second base station, where the first information includes but is not limited to: an antenna port, a sequence number of a demodulation reference signal, and a subframe set; Instructing the time at which any of the second base stations transmits data;

Transmitting, by the at least one communication interface, a sequence number of the demodulation reference signal to the first user equipment; Transmitting the downlink control information to the first user equipment by using the at least one communication interface, so that the first user equipment is configured according to the first mapping relationship, the downlink control information, and the sequence number of the demodulation reference signal. The data is transmitted for channel estimation to obtain an interference-free signal.

34. The first base station according to claim 33, wherein

35. The first base station according to claim 34, wherein

36. The first base station according to claim 33, wherein: