CN107294574B

CN107294574B - Method and device for multi-transmission point data transmission

Info

Publication number: CN107294574B
Application number: CN201610480628.5A
Authority: CN
Inventors: 邓娜; 任海豹; 李元杰; 王婷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-04-08
Filing date: 2016-06-27
Publication date: 2022-04-22
Anticipated expiration: 2036-06-27
Also published as: CN107294574A

Abstract

The embodiment of the invention provides a method and a device for transmitting data of multiple transmission points, wherein the method comprises the following steps: the method comprises the steps that network side equipment generates control information containing at least 2 transmission point indication messages, wherein the at least 2 transmission point indication messages respectively indicate at least 2 transmission points for transmitting data to a terminal, the at least 2 transmission points are non-quasi co-location transmission points, and the at least 2 transmission points are in one-to-one correspondence with the at least 2 transmission point indication messages; and the network side equipment sends the control information to the terminal. Therefore, under a distributed MIMO scene, the terminal can obtain the transmission point indication messages corresponding to a plurality of non-quasi co-located transmission points, and can indicate a plurality of non-quasi co-located transmission points for transmitting data to the terminal, so that the terminal can receive the data transmitted by the non-quasi co-located transmission points.

Description

Method and device for multi-transmission point data transmission

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a method and an apparatus for transmitting data of multiple transmission points.

Background

A Multiple Input Multiple Output (MIMO) technology, also called multi-antenna transmission, can improve system reliability, spatial multiplexing system capacity, and cell coverage by beamforming, is considered as one of the key technologies for achieving high-rate and high-quality data transmission in future mobile communications, and has a wide application prospect in fourth-Generation (4G) or even fifth-Generation (5G) mobile communication systems. Specifically, in Long Term Evolution (LTE) Release 10(Release 10), a new transmission mode (transmission mode 9) is introduced to support Demodulation Reference Signal (DM-RS) of 8 ports and MIMO transmission, specifically, in order to support 8-antenna transmission, a base station needs to indicate a number of transmission layers corresponding to a Physical Downlink Shared Channel (PDSCH) and an antenna port number corresponding to the DM-RS in Control Information carried by a Physical Downlink Control Channel (PDCCH), and specifically, may indicate in Downlink Control Information (DCI) format (format) 2C/2D. The transmitting end applies a precoding technology as one of the key technologies of MIMO, and can minimize the correlation when signals on different transmitting antennas reach a user, minimize the interference when signals on different transmitting antennas reach receiving antennas, and maximize the array gain among multiple antennas.

In the prior art, in order to solve the inter-cell interference problem and improve the throughput of edge users, a Coordinated Multiple Points Transmission/Reception (CoMP) technology is proposed, and in order to support the CoMP technology, a Quasi-Co-located (QCL) antenna port is introduced, where signals transmitted from the QCL antenna port undergo the same large-scale fading. Further, a physical downlink shared channel Resource unit Mapping and Quasi-Co-Location Indicator (PQI for short) is introduced to indicate to the terminal which base station the PDSCH information is sent from and which set of antenna ports the corresponding channel large-scale fading characteristics are consistent with, and the terminal can know which set of Radio channel parameters corresponding to the DM-RS needs to be used for demodulating the PDSCH by combining the PQI and PDSCH Mapping message elements configured by Radio Resource Control (RRC for short).

However, based on the conventional centralized MIMO, in the prior art, DCI format2D only configures one set of QCL parameters, that is, a terminal can only receive PDSCH information from one base station, after the distributed MIMO is introduced, that is, multiple transmitting antennas are distributed in different geographical locations, the terminal may receive multiple PDSCH information from multiple non-QCL base stations at the same time, and if the prior art is continuously adopted, the terminal cannot respectively indicate the PDSCH information from the non-QCL base stations, and cannot know the non-QCL base stations transmitting data.

Disclosure of Invention

The embodiment of the invention provides a method and a device for multi-site data transmission, which are used for solving the problem that a plurality of non-QCL base stations for transmitting data with a terminal cannot be indicated to the terminal in the prior art.

A first aspect of an embodiment of the present invention provides a method for multi-site data transmission, including:

the method comprises the steps that network side equipment generates control information containing at least 2 site indication messages, wherein the at least 2 site indication messages respectively indicate at least 2 sites for transmitting data to a terminal, the at least 2 sites are non-quasi co-location sites, and the at least 2 sites are in one-to-one correspondence with the at least 2 site indication messages;

and the network side equipment sends the control information to the terminal.

Optionally, the station indication message may be an index number of a set of quasi co-location parameter configurations, and the terminal may determine the configuration parameters of the non-quasi co-location stations according to the index number.

The station indication message may be PQI, and the control information may be DCI, which is not limited herein.

In this embodiment, the network side device generates control information including at least 2 station indication messages, and sends the control information to the terminal, so that after the terminal receives the control information, the terminal can obtain at least 2 non-co-located stations transmitting data with the terminal according to the at least 2 station indication messages in the control information, thereby implementing that, in a distributed MIMO scenario, the terminal can obtain station indication messages corresponding to a plurality of non-co-located stations, and also implementing that a plurality of non-co-located stations transmitting data can be indicated to the terminal, so that the terminal can receive data transmitted by the non-co-located stations.

Optionally, before the network side device sends the control information to the terminal, the method further includes:

and the network side equipment sends configuration information to the terminal, wherein the configuration information is used for indicating the number of at least 2 sites.

Optionally, the control information further includes: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 stations.

Or, the control information further includes: at least 2 transmission parameter indication information items, where the at least 2 transmission parameter indication information items are in one-to-one correspondence with the at least 2 stations, and the transmission parameter indication information is used to indicate the number of transmission layers used by the corresponding stations.

Further, the control information further includes: port number set indication information indicating a set of port numbers available for allocation to the at least 2 stations.

The set of port numbers may include: the method comprises the steps of allocating a port number set according to a preset port number sequence, or allocating the port number set according to a frequency division mode, or allocating the port number set according to a code division mode, and the like.

Optionally, the at least 2 stations transmit data to the terminal on the same time-frequency resource block. Further, the port numbers used by the at least 2 stations are different.

Correspondingly, the control information may further include: a Resource Block Assignment (Resource Block Assignment) field indication, configured to indicate a time-frequency Resource Block for the at least 2 stations to transmit data.

In another embodiment, the control information further includes: and the codeword-to-site mapping mode indication information is used for indicating a mapping mode between at least 2 codewords and the at least 2 sites.

The mapping manner between the at least 2 code words and the at least 2 station indication messages includes any one of the following or any combination thereof: each code word corresponds to one station, or each code word corresponds to a plurality of stations, or a plurality of code words correspond to one station. Wherein, the number of the code words is the same as the number of at least 2 sites, and each code word can correspond to one site; when the number of the code words is less than the number of at least 2 sites, each code word may correspond to a plurality of the sites; when the number of the code words is greater than the number of at least 2 stations, a plurality of code words may correspond to one station, which is not limited herein.

Optionally, the control information includes: at least 2 codeword indication information, each of the codeword indication information corresponding to a codeword, the codeword indication information comprising: the code word transmission indication information and/or the code word resource block indication information;

wherein the codeword transmission indication information is used to indicate one or more of the following transmission related information: the number of transmission layers used for transmitting the corresponding code words, the port number used for transmitting the corresponding code words, scrambling identifiers, data resource element mapping information, quasi co-location indication information and transmission point indication information;

the codeword resource block indication information is used for indicating a time-frequency resource block for transmitting a corresponding codeword.

Wherein, the scrambling identifier is used for indicating the scrambling information of the data;

the data resource element mapping information is used for indicating the information of the data resource element mapping;

quasi co-location indication information for indicating a large-scale characteristic of an antenna port of a transmission point transmitting a corresponding codeword;

and transmission point indication information for indicating a station transmitting the corresponding codeword.

Optionally, the sending, by the network side device, the control information to the terminal includes:

the network side equipment determines a control channel format according to the format and/or the transmission mode of the control information;

and the network side equipment sends the control information to the terminal according to the control channel format.

A second aspect of the embodiments of the present invention provides a method for multi-site data transmission, including:

the network side equipment generates control information containing transmission parameter indication information, wherein the transmission parameter indication information is used for indicating a group of transmission layer numbers and port numbers used by at least 2 stations; alternatively, the first and second electrodes may be,

the network side equipment generates control information containing at least 2 items of transmission parameter indication information, wherein the at least 2 items of transmission parameter indication information correspond to at least 2 sites one by one, and the transmission parameter indication information is used for indicating the number of transmission layers used by the corresponding sites. Optionally, the control information further includes: port number set indication information indicating a set of port numbers available for allocation to the at least 2 stations.

Wherein the at least 2 sites are non-quasi co-sited sites.

And the network side equipment sends the control information to the terminal.

In the embodiment, the transmission layer number and the port number of the plurality of non-quasi-co-located stations can be indicated to the terminal.

In other implementation manners in this embodiment, reference may be made to the method for multi-site data transmission in the first aspect, which is not described herein again.

A third aspect of the embodiments of the present invention provides a method for multi-site data transmission, including:

a terminal receives control information sent by network side equipment, wherein the control information comprises at least 2 site indication messages;

the terminal determines at least 2 stations for transmitting data according to the at least 2 station indication messages, wherein the at least 2 stations are non-quasi co-located stations, and the at least 2 stations are in one-to-one correspondence with the at least 2 station indication messages.

Optionally, before the terminal receives the control information sent by the network side device, the method further includes:

and the terminal acquires the bit number of the control information according to the number of the at least 2 preset sites.

the terminal receives configuration information sent by the network side equipment, wherein the configuration information is used for indicating the number of the at least 2 sites;

and the terminal acquires the bit number of the control information according to the number of the at least 2 sites.

Optionally, the receiving, by the terminal, control information sent by the network side device includes:

and the terminal receives the control information sent by the network side equipment according to the bit number of the control information.

Optionally, the control information further includes: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 stations;

the method further comprises the following steps:

and the terminal determines the number of transmission layers and the port number used by the at least 2 sites according to the transmission parameter indication information and the mapping relation between the preset transmission parameter indication information and the number of transmission layers and the port number of the at least 2 sites.

Optionally, the control information further includes: at least 2 pieces of transmission parameter indication information, wherein the at least 2 pieces of transmission parameter indication information correspond to the at least 2 stations one to one.

Optionally, the method further comprises:

and the terminal determines the number of transmission layers used by the at least 2 stations according to the at least 2 pieces of transmission parameter indication information and the mapping relation between the preset transmission parameter indication information and the number of transmission layers.

Further, the control information further includes: port number set indication information.

Optionally, the method further comprises:

the terminal acquires available port number sets allocated to all the sites in the at least 2 sites according to the port indication information and the mapping relation between the preset port indication information and the port number sets;

and the terminal determines the port numbers used by the at least 2 sites according to the available port number sets allocated to the sites in the at least 2 sites and the number of transmission layers used by the at least 2 sites.

The set of port numbers includes: the method comprises the following steps of allocating a port number set according to a preset port number sequence, or allocating the port number set according to a frequency division mode, or allocating the port number set according to a code division mode.

Optionally, after the terminal determines at least 2 stations for transmitting data according to the at least 2 station indication messages, the method further includes:

and the terminal receives the data transmitted to the terminal by the at least 2 stations on the same time-frequency resource block.

Correspondingly, the control information may further include: a Resource Block Assignment (Resource Block Assignment) field indication, configured to indicate a time-frequency Resource Block for the at least 2 stations to transmit data. The terminal can obtain the time-frequency resource blocks of the data transmission of the at least 2 stations according to the resource block allocation domain indication.

In this case, the port number used by each station is different.

and the terminal acquires a data transmission mode between the terminal and the at least 2 stations.

Optionally, the receiving, by the terminal, the control information sent by the network side device includes:

and the terminal receives the control information according to the data transmission mode.

Wherein the control information further includes: and the codeword-to-site mapping mode indication information is used for indicating a mapping mode between at least 2 codewords and the at least 2 sites.

Optionally, the method further comprises:

and the terminal acquires the mapping relation between the at least 2 code words and the at least 2 stations according to the mapping mode between the at least 2 code words and the at least 2 station indication messages.

Optionally, the terminal obtains the transmission layer numbers corresponding to the at least 2 codewords respectively according to the mapping relationship between the at least 2 codewords and the at least 2 sites and the transmission layer numbers used by the at least 2 sites.

Wherein, a mapping manner between the at least 2 code words and the at least 2 station indication messages includes any one of the following or any combination thereof: each code word corresponds to one station, or each code word corresponds to a plurality of stations, or a plurality of code words correspond to one station.

Further, when the total number of transmission layers of the at least 2 stations is 2 layers or 4 layers and the data transmission mode is a transmission mode related to transmit diversity, the method further includes:

and the terminal acquires the mapping relation between the preset single code words and the transmission layer number used by the at least 2 sites according to the mapping relation between the preset single code words and the transmission layer number.

Optionally, the codeword indication information includes the codeword transmission indication information, and the method further includes:

and the terminal determines the transmission related information of the at least 2 code words according to the code word transmission indication information in each code word and the preset mapping relation between the code word transmission indication information and the transmission related information.

Optionally, the codeword indication information includes codeword resource block indication information, and the method further includes:

and the terminal determines to transmit the time-frequency resource block corresponding to the code word according to the code word resource block indication information and the mapping relation between the preset code word resource block indication information and the time-frequency resource block.

the terminal determines a control channel format according to the format and/or the transmission mode of the control information;

and the terminal receives the control information sent by the network side equipment according to the control channel format.

A fourth aspect of the present invention provides a method for multi-site data transmission, which corresponds to the second aspect, and includes:

the terminal receives control information sent by the network side equipment, wherein the control information comprises: transmission parameter indication information for indicating a set of number of transmission layers and port numbers used by at least 2 stations; alternatively, the control information includes: control information of at least 2 transmission parameter indication information items and port number set indication information items, wherein the at least 2 transmission parameter indication information items correspond to at least 2 stations one to one, and the transmission parameter indication information is used for indicating the number of transmission layers used by the corresponding stations; the port number set indication information is used to indicate a set of available port numbers allocated to the at least 2 stations. Wherein the at least 2 sites are non-quasi co-sited sites.

And the terminal determines the number of transmission layers and the port number used by the at least 2 sites according to the control information.

For other implementation manners, reference may be made to the third aspect, which is not described herein again.

A fifth aspect of the present invention provides a device for multi-site data transmission, including:

a processor, configured to generate control information including at least 2 station indication messages, where the at least 2 station indication messages respectively indicate at least 2 stations that transmit data to a terminal, the at least 2 stations are non-quasi co-located stations, and the at least 2 stations are in one-to-one correspondence with the at least 2 station indication messages;

a transmitter for transmitting the control information to the terminal.

Optionally, the transmitter is further configured to send configuration information to the terminal before sending the control information to the terminal, where the configuration information is used to indicate the number of at least 2 stations.

In one embodiment, the control information further includes: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 stations.

In another embodiment, the control information further includes: at least 2 transmission parameter indication information items, where the at least 2 transmission parameter indication information items are in one-to-one correspondence with the at least 2 stations, and the transmission parameter indication information is used to indicate the number of transmission layers used by the corresponding stations.

Optionally, the control information further includes: port number set indication information indicating a set of port numbers available for allocation to the at least 2 stations.

The set of port numbers includes: the port number set allocated according to the preset port number sequence, or the port number set allocated according to the frequency division manner, or the port number set allocated according to the code division manner, but not limited thereto.

Optionally, the at least 2 stations transmit data to the terminal on the same time-frequency resource block.

Optionally, the port numbers used by the at least 2 stations are different.

Optionally, the control information further includes: and the codeword-to-site mapping mode indication information is used for indicating a mapping mode between at least 2 codewords and the at least 2 sites.

The mapping manner between the at least 2 codewords and the at least 2 stations includes any one of the following or any combination thereof: each code word corresponds to one station, or each code word corresponds to a plurality of stations, or a plurality of code words correspond to one station.

Optionally, the processor is further configured to determine a control channel format according to a format and/or a transmission mode of the control information;

the transmitter is specifically configured to transmit the control information to the terminal according to the control channel format.

A sixth aspect of the present invention provides a device for multi-site data transmission, including:

the receiver is used for receiving control information sent by network side equipment, wherein the control information comprises at least 2 site indication messages;

a processor, configured to determine at least 2 stations for transmitting data according to the at least 2 station indication messages, where the at least 2 stations are non-quasi co-located stations, and the at least 2 stations are in one-to-one correspondence with the at least 2 station indication messages.

Optionally, the processor is further configured to, before the receiver receives the control information sent by the network side device, obtain the bit number of the control information according to the preset number of the at least 2 stations.

Optionally, the receiver is further configured to receive configuration information sent by a network-side device before receiving control information sent by the network-side device, where the configuration information is used to indicate the number of the at least 2 stations; correspondingly, the processor is configured to obtain the bit number of the control information according to the number of the at least 2 stations.

Further, the receiver receives control information sent by a network side device, specifically, receives the control information sent by the network side device according to the bit number of the control information.

In one embodiment, the control information further includes: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 stations; accordingly, the number of the first and second electrodes,

the processor is further configured to determine, according to the transmission parameter indication information and a mapping relationship between preset transmission parameter indication information and the number of transmission layers and the port number of the at least 2 stations, the number of transmission layers and the port number used by the at least 2 stations.

In another embodiment, the control information further includes: at least 2 pieces of transmission parameter indication information, wherein the at least 2 pieces of transmission parameter indication information correspond to the at least 2 stations one to one; accordingly, the number of the first and second electrodes,

the processor is further configured to determine the number of transmission layers used by the at least 2 stations according to the at least 2 pieces of transmission parameter indication information and a mapping relationship between preset transmission parameter indication information and the number of transmission layers.

Optionally, the control information further includes: port number set indication information; accordingly, the number of the first and second electrodes,

the processor is further configured to obtain, according to the port indication information and a mapping relationship between preset port indication information and a port number set, a port number set available for each of the at least 2 sites; and determining the port numbers used by the at least 2 stations according to the available port number set allocated to each of the at least 2 stations and the number of transmission layers used by the at least 2 stations.

Wherein the set of port numbers comprises: the method comprises the following steps of allocating a port number set according to a preset port number sequence, or allocating the port number set according to a frequency division mode, or allocating the port number set according to a code division mode.

And the receiver is further configured to receive data transmitted to the terminal by the at least 2 stations on the same time-frequency resource block.

Optionally, the processor is further configured to acquire a data transmission mode with the at least 2 stations. Correspondingly, the receiver receives control information sent by the network side device, specifically: and receiving the control information according to the data transmission mode.

Further, when the total number of transmission layers of the at least 2 stations is 2 or 4 and the data transmission mode is a transmission mode related to transmit diversity, the processor is further configured to obtain mapping relationships between the preset single code words and the number of transmission layers used by the at least 2 stations, respectively, according to a mapping relationship between the preset single code words and the number of transmission layers.

Further, the control information further includes: codeword to site mapping mode indication information, configured to indicate a mapping mode between at least 2 codewords and the at least 2 sites; accordingly, the number of the first and second electrodes,

the processor is further configured to obtain a mapping relationship between the at least 2 codewords and the at least 2 sites according to a mapping manner between the at least 2 codewords and the at least 2 sites.

The processor is further configured to obtain the number of transmission layers corresponding to the at least 2 codewords according to the mapping relationship between the at least 2 codewords and the at least 2 sites and the number of transmission layers used by the at least 2 sites.

Optionally, the codeword indication information includes the codeword transmission indication information;

the processor is further configured to determine the transmission related information of the at least 2 codewords according to codeword transmission indication information in each codeword and a preset mapping relationship between the codeword transmission indication information and the transmission related information.

Optionally, the codeword indication information includes codeword resource block indication information;

and the processor is further configured to determine, according to the codeword resource block indication information and a mapping relationship between preset codeword resource block indication information and a time-frequency resource block, a time-frequency resource block for transmitting the corresponding codeword.

the receiver is specifically configured to receive, according to the control channel format, control information sent by a network side device.

In a seventh aspect, an embodiment of the present invention provides a device for multi-site data transmission, where the device for multi-site data transmission includes a functional module configured to implement the method in the first aspect.

In an eighth aspect, an embodiment of the present invention further provides a device for multi-site data transmission, where the device for multi-site data transmission includes a functional module configured to implement the method in the second aspect.

In a ninth aspect, an embodiment of the present invention further provides a device for multi-site data transmission, where the device for multi-site data transmission includes a functional module for implementing the method in the third aspect.

In a tenth aspect, an embodiment of the present invention further provides an apparatus for multi-site data transmission, where the apparatus for multi-site data transmission includes functional modules for implementing the method in the fourth aspect.

In an eleventh aspect, embodiments of the present invention also provide a computer storage medium having program code stored thereon, where the program code includes instructions for implementing any possible implementation manner of the method of the first, second, third or fourth aspect.

In the method and apparatus for multi-site data transmission provided in the embodiments of the present invention, a network side device generates control information including at least 2 site indication messages, and sends the control information to a terminal, so that after receiving the control information, the terminal can obtain at least 2 non-co-located sites transmitting data with the terminal according to the at least 2 site indication messages in the control information, thereby implementing that, in a distributed MIMO scenario, the terminal can obtain site indication messages corresponding to a plurality of non-co-located sites, implementing that a plurality of non-co-located sites transmitting data can be indicated to the terminal, so that the terminal can receive data transmitted by the non-co-located sites.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1-fig. 3 are schematic diagrams illustrating application scenarios of a method for transmitting multi-transmission point data according to the present invention;

fig. 4 is a flowchart illustrating a first method for transmitting data of multiple transmission points according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first apparatus for multi-transmission point data transmission according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second apparatus for multi-transmission point data transmission according to the present invention.

Detailed Description

The embodiment of the invention is based on the CoMP technology and combines the MIMO technology, so that the terminal can receive data transmitted by a plurality of non-QCL base stations in a distributed MIMO scene. The embodiment of the present invention is applicable to both homogeneous networks and heterogeneous networks, and is not limited herein.

In a distributed MIMO scenario, that is, multiple stations are distributed at different geographic locations, wherein a multi-point diversity cooperative transmission mode may be adopted, that is, antennas distributed at two or more stations (also referred to as transmission points) transmit signals in a space-frequency block coding (SFBC) mode, specifically, taking two stations as an example, 2 antennas may be used for each station, the two stations perform precoding respectively to generate 1 data stream, and the 2 data streams of the two stations are combined to perform SFBC with 2 antennas; or, 2 antennas are provided for each site, and 4 antennas of two sites together perform SFBC and Frequency Switching Transmit Diversity (FSTD) with 4 antenna ports; there may also be a multi-point multi-stream cooperative transmission mode, in which two or more stations perform precoding independently and transmit different data streams and different code blocks to the same terminal. Of course, these two transmission methods are not limited.

The Station in the embodiment of the present invention may be a Base Transceiver Station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), may be a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), may be an evolved Node B (eNB or eNodeB) in Long Term Evolution (Long Term Evolution, LTE), or may be a relay Station or Access point, or a Base Station in a future 5G network, and the like, which is not limited herein.

Further, the station in the embodiment of the present invention may be referred to as a "cooperative transmission point", and refers to a transmission point for cooperative transmission, where one cooperative transmission point is one transmission point in a cooperative set, for example, may be a base station or a cell. Further, a cooperative transmission point may be a serving base station or a cooperative base station. A cooperative transmission point may also be a Remote Radio Unit (RRU) in the distributed base station. The signals transmitted from any two transmission points of the multiple coordinated transmission points may experience different large-scale fading characteristics (i.e., non-co-location), and may belong to the same cell or belong to different cells, without limitation. The large scale characteristics include one or more of delay spread, doppler shift, average channel gain, and average delay.

The terminal in the embodiment of the present invention may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.

Fig. 1-fig. 3 are schematic diagrams of application scenarios of a method for transmitting multi-transmission point data according to the present invention, as shown in fig. 1, two cells are taken as an example, that is, two cells are formed by two sites distributed at different geographic locations: cell1 and cell2, each having 2 antennas per site, 2 antennas of cell1 are denoted as cell1-1 and cell1-2, and 2 antennas of cell2 are denoted as cell2-1 and cell2-2, and these 4 antennas all transmit signals to terminal (UE) 01. The specific transmission method is not particularly limited herein.

One of the two sites may be a service site, the other may be a collaboration site, or both may be service sites. The serving site refers to a site to which the serving cell belongs, and the cooperating site refers to a site to which the cooperating cell belongs. And are not intended to be limiting herein.

As shown in fig. 2, the communication network system includes a first station, a second station, and a terminal.

The first site is a serving network side device (which may be a serving site) of the terminal, where the serving network side device is the network side device that provides services such as RRC connection, non-access stratum (NAS) mobility management, security input, and the like for the terminal through a radio air interface protocol. The first station and the terminal can communicate through an air interface protocol. The number of the second sites may be one or more, and the second sites are network-side devices satisfying different QCLs from the first sites, and in general, the second sites are located in different geographical locations from the first sites. Generally, the second station is a neighboring network side device of the first station. The second station may also perform data transmission via an air interface protocol. The second station is configured to assist the first station to perform data transmission, for example, multiflow or diversity transmission, to the terminal together, so the second station may also be referred to as a cooperative network side device. Communication between the first and second stations may also occur, such as the communication of control messages and/or instructional information.

In practical applications, the first site may also be a cooperative network side device, and the second site is a serving network side device.

On the other hand, the first station and the second station may be different transmission points of the same device, such as two relatively distant Radio Units (RU) or Radio Heads (RH), or two completely independent network-side devices, such as two base stations.

In the embodiment of the invention, the first station and the second station simultaneously send data to the terminal, wherein the data comprise two meanings. And in the first layer meaning, the first station and the second station send data to the terminal on the same time domain resource. And in the second layer meaning, the first station and the second station send data to the terminal on different time domain resources.

It should be noted that, in CoMP transmission, it is assumed that wireless channels through which signals of multiple antenna ports received by a terminal pass have the same large-scale characteristic, that is, the multiple antenna ports belong to the same QCL set. In this way, for two network-side devices with different wireless channels from the terminal, if data is simultaneously transmitted to the terminal-side device, antennas in the two network-side devices need to be jointly virtualized to form an antenna port satisfying QCL constraints, and the demodulation reference signal and the data are transmitted at the antenna port. A joint virtualization method is an SFN technique, in which a first antenna port in an antenna set of a first site and a second antenna port in an antenna set of a second site are combined into one antenna port, and data transmitted from the antenna port is used for transmitting the same modulation symbol in the same time-frequency resource for the first antenna and the second antenna.

In the case of the meaning of the first layer, in the solution of this embodiment, the antenna ports in the first antenna port set used by the first station are different from the antenna ports in the second antenna port set used by the second station. In other words, the first set of antenna ports belongs to one set of QCLs and the second set of antenna ports belongs to another set of QCLs, both sets of QCLs being non-QCLs. In this embodiment, data may be transmitted to the terminal through two non-QCL antenna ports on the same time domain symbol.

In the case of the second layer meaning, although the first station and the second station may transmit data on different time domain symbols, in this embodiment, antenna port allocation is performed in advance, and antenna ports in a first antenna port set used by the first station and antenna ports in a second antenna port set used by the second station are not identical.

As shown in fig. 3, unlike the scenario shown in fig. 2, the first station and the second station access the centralized scheduler simultaneously. The first station and the second station may not communicate directly, and the control message and/or the indication message are issued to the first station and the second station by the centralized scheduler.

In actual deployment, the centralized scheduler may be a single physical device, or may be a functional module integrated on the first site, or a functional module integrated on another device, which is not limited in the embodiment of the present invention.

It should be understood that the communication systems shown in fig. 2 and 3 show only one terminal (isolated terminal) and two stations, but the present invention is not limited thereto. The communication system may further include neighboring stations and terminals, which transmit services on the same time-frequency resource, besides the two stations, and each network-side device may further include other numbers of terminals within the coverage area. Further optionally, the communication system in which the station and the terminal are located in fig. 2 and 3 may further include other network entities such as a network controller and/or a mobility management entity, which is not limited in the embodiment of the present invention.

Fig. 4 is a flowchart illustrating a first embodiment of a method for transmitting multi-transmission point data according to the present invention, as shown in fig. 4, the method includes:

s101, a network side device generates control information containing at least 2 site indication messages, wherein the at least 2 site indication messages respectively indicate at least 2 sites for transmitting data to a terminal, and the at least 2 sites are non-quasi-co-located sites.

The at least 2 stations are in one-to-one correspondence with the at least 2 station indication messages, that is, how many non-co-located stations transmit data to the terminal, and how many station indication messages are configured by the network side device. The station indication message may be an index number of a set of quasi co-location parameter configurations, and the terminal may determine the configuration parameters of the non-quasi co-location stations according to the index number.

It should be noted that the network-side device may be one of the at least 2 sites, and specifically, may be a service site in the at least 2 sites, but is not limited thereto.

The station indication message may be PQI, and for example, two non-co-located stations, assuming that one is a serving station and the other is a cooperating station, the PQI may be used separately₀And PQI₁And indicating to generate control information, wherein the control information comprises the at least 2 station indication messages.

And S102, the network side equipment sends the control information to the terminal.

For example, in the specific implementation process, the control information may be DCI, specifically may be DCI of format2D or 2C, taking DCI format2D as an example, wherein 1 or more bits may specifically form 1 station indication message, taking 2 bits as an example, and the value of the 2 bits represents index numbers configured by different quasi-co-location parameters, that is, the value of the PQI domain, as shown in table 1:

TABLE 1

Value of PQI field	Description of the invention
		'00'	High-level configured parameter set 1
'01'	Higher layer configured parameter set 2
		'10'	Higher layer configured parameter set 3
'11'	Higher layer configured parameter set 4

Specifically, in the control information, the station indication messages corresponding to each station may be arranged according to a preset sequence, and assuming that there are two stations, each station is represented by a PQI₀And PQI₁Indicating, e.g. PQI₀Is 00, PQI₁At 01, then 2 station indication messages in the control information are denoted as "0001".

Of course, without limiting the above examples, each station indication message may occupy one or more bits, and the at least 2 station indication messages may be arranged in a certain order.

And S103, the terminal receives the control information sent by the network side equipment.

And S104, the terminal determines at least 2 sites for transmitting data according to the at least 2 site indication messages.

For example, there is a station indication message PQI corresponding to 2 stations₀And PQI₁Each of which takes 2 bits, the terminal can read the PQI first in sequence ₀2 bits of (e.g. "00"), and then reads PQI₁For example, but not limited to, "01".

The terminal can acquire the related information of at least 2 non-co-sited stations transmitting data with the terminal according to at least 2 station indication messages in the control information, and then the terminal can receive the data transmitted by the at least 2 stations.

In this embodiment, the network side device generates control information including at least 2 station indication messages, and sends the control information to the terminal, so that after the terminal receives the control information, the terminal can obtain at least 2 non-co-located stations transmitting data with the terminal according to the at least 2 station indication messages in the control information, thereby implementing that, in a distributed MIMO scenario, the terminal can obtain station indication messages corresponding to a plurality of non-co-located stations, implementing that a plurality of non-co-located stations transmitting data can be indicated to the terminal, so that the terminal can receive data transmitted by the non-co-located stations.

It should be noted that, when the terminal receives the control information, a blind check method may be adopted, and before the terminal receives the control information sent by the network side device, the terminal needs to know the size of the control information, so that the terminal receives the control information, that is, the terminal needs to perform the blind check according to the size of the control information. Specifically, the terminal may obtain the size of the control information according to the number of the at least 2 stations.

Optionally, in an embodiment, the network side device may pre-configure the number of stations for transmitting data to the terminal, and the terminal may also know the number of station indication messages in the control information in advance, and also know the size of the control information, that is, the terminal obtains the bit number of the control information according to the number of the at least 2 preset stations.

Optionally, in another mode, the network side device dynamically indicates, through a high-level signaling, the number of stations for transmitting data by the terminal, that is, indicates the number of station indication messages in the control information, and the terminal dynamically calculates the size of the control information, that is, the terminal receives configuration information sent by the network side device, where the configuration information is used to indicate the number of the at least 2 stations, and then the terminal obtains the bit number of the control information according to the number of the at least 2 stations. In this dynamic indication manner, the network side device may determine the number of stations transmitting data to the terminal in consideration of the receiving capability of the terminal, which is more flexible.

Correspondingly, the terminal receives the control information sent by the station according to the bit number of the control information.

Optionally, before the terminal receives the control information sent by the network side device, the terminal may further obtain the data transmission modes of the at least 2 stations. The data transmission method may be a multi-point diversity cooperative transmission method, a multi-point multi-stream cooperative transmission method, and the like, which is not limited herein.

After the terminal knows the data transmission mode, the terminal can also know the information such as the size of the control information, and the terminal can then blindly detect the control information.

On the basis of the above embodiment, it is further necessary to indicate the number of transmission layers and the port number used by the above at least 2 stations to the terminal. It should be noted that, in the multi-antenna system of LTE, in order to distinguish different channels, different logical ports are defined, and the logical ports are mainly classified into three types:

1) a Cell-specific Reference Signal (CRS) is the most basic downlink Reference Signal in LTE. In a cell, there may be 1, 2 or 4 cell-specific reference signals, which are defined as 1, 2 or 4 antenna ports, and in the LTE specification, they refer to antenna ports with port numbers 0 to 3.

2) User-level reference signals, such as DM-RS, are dedicated to channel estimation of PDSCH for terminals in transmission modes 7-10. In the LTE specification, a terminal can be configured with up to 8 different PDSCH DM-RSs at antenna ports with port numbers of 7-14.

3) A CSI Reference Signal (CSI-RS) is used by the terminal to acquire CSI in the transmission modes 9 and 10. In the LTE specification, the antenna ports corresponding to the CSI-RS refer to the antenna ports with the port numbers of 15-22.

The port numbers mentioned in the embodiments of the present invention generally refer to port numbers 7-14, but are not limited thereto.

Optionally, the control information may further include: and transmission parameter indication information, where the transmission parameter indication information is used to indicate a set of number of transmission layers and port number used by the at least 2 stations.

Specifically, one or more bits may be used as the transmission parameter indication information in the control information, and the bit value of the transmission parameter indication information indicates a set of number of transmission layers and port number used by the at least 2 stations. Each group of transmission layer numbers and port numbers corresponding to the at least 2 stations may have an index number, and then the binary bit value of the index number may be used as the transmission parameter indication information.

Taking two sites as an example, for example, "0" identifies that the number of transmission layers used by the first site is 1layer and the port number is 7(1 layer, port 7), and the number of transmission layers used by the second site is 1layer and the port number is 8(1 layer, ports 8).

For example, the transmission parameter indication information may have 16 values shown in table 2, and respectively identify the number of transmission layers and the port number used by at least 2 stations in 16 groups.

TABLE 2

The allocation shown in table 2 is based on the size of the port number and the index size of the station indication message PQI (PQI)₀And PQI₁) The available ports may be divided into multiple groups (specifically, the available ports may be divided into 2 groups according to the number of the at least 2 sites, that is, the total 2 sites are divided into 2 groups), and specifically, the available ports may be divided into groups in a Code division manner, that is, the port numbers in each group are distinguished by Orthogonal Code (OCC). Taking the division into 2 groups as an example, assuming that one group of port numbers is 7, 8, 11, and 13 in the same frequency domain, and the other group of port numbers is 9, 10, 12, and 14 in the same frequency domain, the two groups of port numbers are respectively allocated to 2 stations for use, and then specifically allocated according to the number of transmission layers corresponding to each station, for example, the first station uses 3-layer transmission layers, and the port numbers 7, 8, and 11 can be sequentially selected from the port numbers 7, 8, 11, and 13; the second station uses the layer 2 transport layer and may select port numbers 9 and 10 from port numbers 9, 10, 12, and 14.

In addition, the port numbers may also be divided by a frequency division manner, the port numbers are divided into multiple groups according to different frequency domain resources, each group corresponds to one station, and then the port numbers are sequentially allocated according to the number of transmission layers of the station, for example, the port numbers 7, 8, 11, and 13 are allocated to a first station, and the port numbers 9, 10, 12, and 14 are allocated to a second station, which may specifically refer to the example in table 3, or a group of transmission layers and port numbers of at least 2 stations may be allocated according to the value of each transmission parameter indication information, but is not limited thereto:

TABLE 3

Accordingly, the terminal side may pre-configure a mapping relationship between the transmission parameter indication information and the number of transmission layers and the port number of the at least 2 stations, for example, a mapping table similar to table 3 may be preset, and the terminal determines the number of transmission layers and the port number used by the at least 2 stations according to the transmission parameter indication information and the mapping relationship between the preset transmission parameter indication information and the number of transmission layers and the port number of the at least 2 stations. For example, if the transmission parameter indication information in the control information received by the terminal is 15, the terminal may learn, according to the mapping relationship between the preset transmission parameter indication information and the number of transmission layers and the port numbers of the at least 2 stations, that the first station corresponding to "15" uses the port of the 4-layer transmission layer and the port numbers 7 to 10, and that the second station corresponding to "15" uses the port of the 4-layer transmission layer and the port numbers 11 to 14.

In an optional embodiment, according to an indication requirement, the control information may also include only the transmission parameter indication information.

Optionally, in another implementation manner, the control information further includes: at least 2 transmission parameter indication information items, where the at least 2 transmission parameter indication information items are in one-to-one correspondence with the at least 2 stations, and the at least 2 transmission parameter indication information items are respectively used for indicating the number of transmission layers used by the at least 2 stations.

That is, in this embodiment, a plurality of transmission parameter indication information may be used, where each transmission parameter indication information indicates the number of transmission layers of 1 station, and when a plurality of stations are indicated, the transmission parameter indication information may be arranged according to a certain sequence, so that the terminal may identify the transmission parameter indication information corresponding to each station according to a preset sequence, and further identify the number of transmission layers corresponding to each station.

As shown in table 4:

TABLE 4

Transmission parameter indication information	Number of transmission layers
		00	1layers
01	2layers
		10	3layers
11	4layers

Specifically, the station indication message may include one or more bits as transmission parameter indication information, where the transmission parameter indication information has different values and indicates different numbers of transmission layers. Referring to table 4, for example: "00" indicates 1layer, and "01" indicates 2 layers, and specifically, assuming that the number of transmission layers of the serving station is 1layer identified by "00" and the number of transmission layers of the cooperative station is 2 layers identified by "01", the number of transmission layers respectively corresponding to the two stations may be indicated by the transmission parameter indication information of "0001" in the control information.

In a specific implementation process, the number of transmission layers and the port number may also be corresponded in this way, for example, "00" indicates "layer 1 transmission layer, port number 7," and "01" indicates "layer 2 transmission layer, port number 8, 9," and then the transmission parameter indication information of "0001" may indicate that the two stations respectively correspond to "layer 1 transmission layer, port number 7," and "layer 2 transmission layer, port number 8, 9. Of course, the present invention is not limited thereto.

In this embodiment, the control information may further add a special bit to indicate the port number used by the at least 2 stations, and specifically, there may also be multiple indication manners, for example, add port number indication information, where different port number indication information corresponds to different port numbers.

Preferably, in order to save resources, the control information includes: the port number set indication information occupies 1 or more bits, and different values identify different port number sets.

Optionally, the set of port numbers may include: the set of port numbers includes: the port number set allocated according to the preset port number sequence, or the port number set allocated according to the frequency division manner, or the port number set allocated according to the code division manner, but is not limited to these allocation manners. Wherein, the port numbers are distributed according to the preset port number sequence, namely according to the size sequence of the port numbers; allocating port numbers according to a frequency division mode, namely dividing the port numbers into a plurality of groups according to different frequency domain resources, wherein each group corresponds to one station, and then allocating the port numbers according to the transmission layer number of the station in sequence; the port numbers are allocated according to a code division manner, and are mainly allocated in a code division manner to port numbers on the same frequency domain resource, that is, the port numbers on the same frequency domain resource are allocated to different stations, that is, DMRS parameter signals corresponding to ports used by the stations ensure orthogonality between reference signals in a code division manner (specifically, an OCC manner may be used).

For example, assuming that the port number set indication information is 1 bit, two port number sets are respectively indicated by "0" and "1", for example, the port number set indication information is "0" to indicate that "port numbers are allocated according to a preset port number sequence", taking port numbers 7-14 as an example, the number of transmission layers of the first station is two, port numbers 7 and 8 are correspondingly allocated, the number of transmission layers of the second station is 3, and port numbers 9, 10 and 11 are correspondingly allocated.

For example, the port number set indication information is "1" to indicate "port number is allocated in a frequency division manner", that is, the port numbers are divided into a plurality of groups according to different frequency domain resources, and when the at least 2 stations are assumed to be 2 stations, the port numbers are divided into 2 groups according to different frequency domain resources, for example, one group is 7/8/11/13, the other group is 9/10/12/14, each group is allocated to one station, and then corresponding ports are sequentially allocated according to the number of transmission layers of each station, for example, the port number 7/8/11/13 corresponds to the first station, and the number of transmission layers of the first station is 2, then the port numbers 7 and 8 are correspondingly allocated; the second station corresponds to port number 9/10/12/14 and the number of transport layers for the second station is 3, then port numbers 9, 10, 12 are assigned.

Of course, the port number set indication information may also be "1" indicating "port numbers are allocated in a code division manner", assuming that the port number 7/8/11/13 is in the same frequency domain resource and the port number 9/10/12/14 is in the same frequency domain resource, the port number 7/8/11/13 is allocated to a different station, and the port number 9/10/12/14 is also allocated to a different station, taking two stations as an example, the port numbers 7, 9, 13, and 14 may be allocated to a first station, and the port numbers 8, 10, 11, and 12 may be allocated to a second station, for example, the first station is a 2-layer transport layer, and the port numbers 7 and 13 may be allocated to the first station; the second station is also a layer 2 transport layer, and port numbers 8 and 11 may be assigned to the second station, but not limited thereto.

Correspondingly, the terminal determines the number of transmission layers used by the at least 2 stations according to the at least 2 pieces of transmission parameter indication information and the mapping relationship between the preset parameter transmission indication information and the number of transmission layers, that is, the terminal is preset with the mapping relationship between the preset parameter transmission indication information and the number of transmission layers, and the terminal searches for matching in the mapping relationship between the preset parameter transmission indication information and the number of transmission layers according to the at least 2 pieces of transmission parameter indication information in the control information, so as to determine the number of transmission layers used by each station.

Similarly, the terminal may obtain, according to the port number indication information and the mapping relationship between the preset port indication information and the port number set, an available port number set allocated to each of the at least 2 sites.

And the terminal may determine the port numbers used by the at least 2 stations according to the port number assigned to the set of port numbers available to each of the at least 2 stations and the number of transmission layers used by the at least 2 stations. That is, after the terminal learns the available port number set of each station, the port number of the station can be correspondingly obtained according to the learned number of transmission layers used by the station, for example, if the terminal knows that the port numbers are sequentially allocated, and the number of transmission layers of the first station is 2, it can be determined that the port numbers of the first station are 7 and 8; the number of transmission layers of the second station is 3 layers, it can be determined that the port numbers of the second station are 9, 10, 11.

In an optional embodiment, according to an indication requirement, the control information may only include the at least 2 transmission parameter indication information. Alternatively, only the following are included: the above-mentioned at least 2 items of transmission parameter indication information and port number set indication information. And are not intended to be limiting herein.

Further, the control information may further include: and the codeword to site mapping mode indication information is used for indicating the mapping mode of the at least 2 codewords and the at least 2 sites.

In the embodiment of the present invention, in the multi-site cooperative data transmission, the total number of transmission layers is generally greater than 1layer, and thus generally corresponds to 1 or more code words, and the mapping relationship between a code word and the at least 2 sites may be any one or any combination of the following: each codeword corresponds to one station, or each codeword corresponds to multiple stations, or multiple codewords correspond to one station, which is not limited herein.

In a specific implementation process, when the number of the at least 2 sites is the same as the number of the code words, each code word may generally correspond to one site, for example, there are two code words CW₀And CW₁There are also two sites: first and second stations, then CW₀Corresponding to the first station, CW₁And a second siteAnd (7) corresponding. When the number of the at least 2 stations is greater than the number of the code words, each code word may correspond to multiple stations, and the corresponding manner is not limited herein, for example, a polling manner may be adopted, and it is assumed that there are two code words CW₀And CW₁With three stations, then CW₀CW corresponding to the first station₁Corresponding to the second station, and further CW₀Also corresponding to a third site, CW₀(coded 0) corresponds to 2 sites, CW₁Corresponding to a site. When the number of at least 2 sites is smaller than the number of code words, a plurality of code words may correspond to 1 site, which is not limited herein. Specifically, one correspondence may refer to table 5, but is not limited to table 5:

TABLE 5

Correspondingly, the terminal may obtain the mapping relationship between the at least 2 codewords and the at least 2 sites according to the mapping manner between the at least 2 codewords and the at least 2 sites.

And then the terminal can obtain the transmission layer numbers respectively corresponding to the at least 2 code words according to the mapping relation between the at least 2 code words and the at least 2 sites and the transmission layer numbers used by the at least 2 sites.

Optionally, when the total number of transmission layers of the at least 2 stations is 2 or 4 and the data transmission mode is a transmit diversity related transmission mode, a single codeword mode may be adopted, that is, only one codeword corresponds to the total number of transmission layers of 2 or 4, respectively, in this case, the mapping relationship between the single codeword and the number of layers may be directly preset in the terminal, and no indication is required by the network side device, that is, the terminal may obtain the mapping relationship between the preset single codeword and the number of transmission layers used by the at least 2 stations, according to the mapping relationship between the preset single codeword and the number of transmission layers.

It should be noted that the transmission diversity related transmission scheme may include: the coordinated multipoint diversity transmission scheme may be another new transmission scheme, as long as the transmission scheme is similar to the transmit diversity, and is not limited herein.

When the total number of transmission layers of the at least 2 stations is 2 layers or 4 layers and the data transmission method is a transmit diversity related transmission method, for a method including one piece of transmission parameter indication information, the transmission parameter indication information only needs to indicate the number of transmission layers 2 layers or 4 layers, and a small number of bits may be used, taking table 6 as an example, but not limited thereto:

TABLE 6

For the mode containing at least 2 pieces of transmission parameter indication information, the situation of only needing to indicate the transmission layer number of a single station, namely 1layer or 2 layers. Taking table 7 as an example, but not limited thereto:

TABLE 7

Transmission parameter indication information	Number of transmission layers
		'0'	1layer
'1'	2layers

Optionally, on the basis of the foregoing embodiment, the terminal may receive data transmitted to the terminal by the at least 2 stations. In this case, the port numbers used by the stations are different, and may be that the port numbers of the stations are staggered, and the specific allocation is not limited herein.

Optionally, the control information may further include: a Resource Block Assignment (Resource Block Assignment) field indication, configured to indicate a time-frequency Resource Block for the at least 2 stations to transmit data. The terminal can obtain the time-frequency resource blocks of the data transmission of the at least 2 stations according to the resource block allocation domain indication.

In the embodiment of the invention, at least 2 non-co-location sites for transmitting data are indicated to the terminal, and information such as ports, transmission layer numbers, code words and the like can be further indicated, so that the terminal can further know the port numbers, the transmission layer numbers, the code words and the like corresponding to the sites, and the data can be transmitted to the terminal by multi-site cooperation under a distributed MIMO scene better.

Optionally, the control information may include: at least 2 code word indication information, each corresponding to a code word. Wherein each codeword indication information includes: the codeword transmits indication information, and/or resource block indication information.

In this embodiment, the domain of the codeword is equivalently expanded, and the codeword indication information is used to further indicate the relevant information to the terminal.

Wherein the codeword transmission indication information is used to indicate one or more of the following transmission related information: the number of transmission layers used for transmitting the corresponding codeword, the port number used for transmitting the corresponding codeword, a scrambling identity (scrambling identity), data resource element mapping information, quasi-co-location indication information, and transmission point indication information.

The scrambling identity is used to indicate scrambling information of the data. The scrambling identity may be carried, for example, using higher layer signaling. Optionally, the scrambling identity may be a cell identity, or may be a virtual identity, which is not limited herein, where the virtual identity may refer to a common identity after negotiation of multiple cells, which is not limited herein.

The data resource element mapping information is information indicating a data resource element mapping. Examples may include: mapping resource element information of reference signals such as CRS and channel state information-reference signal (CSI-RS), demodulation reference signal (DMRS). The terminal can determine the resource elements which can be mapped by the data resource mapping identifier. For example, the data resource mapping identification includes: the terminal may know resource elements of the CRS sent by the network side device according to the cell Identifier (ID) or the CRS offset (CRS offset) of the cooperative base station, so as to avoid the terminal decoding a Physical Downlink Shared Channel (PDSCH) on the Resource Elements (RE).

And the quasi co-location indication information is used for indicating the large-scale characteristic of the antenna port of the station transmitting the corresponding code word. Namely, the antenna port large-scale characteristic of the station transmitting the codeword transmission indication information corresponding to the codeword is indicated. The large-scale characteristics may include one or more of delay spread, doppler shift, average channel gain, and average delay. Specifically, the quasi-co-location indication information may indicate a large-scale characteristic relationship with a CRS antenna port or a large-scale characteristic relationship with a CSI-RS antenna port, or other indication manners.

And transmission point indication information for indicating a station transmitting the corresponding codeword. I.e. indicating the station transmitting the codeword corresponding to the codeword transmission indication information.

It should be noted that, the network side device indicates, according to needs, one or a combination of two of the codeword transmission indication information and the resource block indication information, where the codeword transmission indication information also indicates one or a combination of any multiple of the foregoing information, for example:

the codeword transmission indication information indicates only any one of: the number of transmission layers used for transmitting the corresponding code words, the port number used for transmitting the corresponding code words, scrambling identifiers, data resource element mapping information, quasi co-location indication information and transmission point indication information; or, the codeword transmission indication information indicates: the number of transmission layers used for transmitting the corresponding code word and the port number used for transmitting the corresponding code word; or, the codeword transmission indication information indicates: the number of transmission layers and scrambling identifiers used for transmitting the corresponding code words; or, the codeword transmission indication information indicates: the number of transmission layers used for transmitting the corresponding code word, a data resource mapping identifier and the like. Of course, the above cases are not limited to the above cases, and any combination may be used.

It should be noted that, when the codeword transmission indication information indicates: when transmitting a part of the information, i.e., the number of transmission layers used for transmitting the corresponding codeword, the port number used for transmitting the corresponding codeword, the scrambling identifier, the data resource element mapping information, the quasi-co-located indication information, and the transmission point indication information, other information than the part indicated by the codeword transmission indication information in the information may be indicated by another identification information or proprietary information, and the like, which is not limited herein.

Specifically, the indication information of codeword transmission indicates only to indicate the number of transmission layers used for transmitting the corresponding codeword, in this case, the terminal side may preset a mapping relationship between the number of transmission layers and a port number, and then after determining the number of transmission layers according to the indication information of codeword transmission, the terminal may know the port number used for transmitting the corresponding codeword according to the mapping relationship between the number of transmission layers and the port number, and similarly, may preset a mapping relationship between the number of transmission layers and a scrambling identifier, a mapping identifier of a data resource, and the like, which is not described herein repeatedly. Alternatively, the first and second electrodes may be,

the codeword transmission indication information indicates that only the port number used for transmitting the corresponding codeword is indicated, in this case, the terminal side may also preset a mapping relationship between the port number and the number of transmission layers, and then the terminal may obtain the number of layers used for transmitting the corresponding codeword after determining the port number. Alternatively, the first and second electrodes may be,

the codeword transmission indication information indicates the number of transmission layers used for transmitting the corresponding codeword and the port number used for transmitting the corresponding codeword, and a joint indication and separate indication method may be adopted, where:

the joint indication means that one identifier (for example, one bit) indicates the number of transmission layers used for transmitting the corresponding codeword and the port number used for transmitting the corresponding codeword at the same time in the codeword transmission indication information, and in this case, the terminal side can obtain the number of transmission layers used for transmitting the corresponding codeword and the port number used for transmitting the corresponding codeword according to the mapping relationship between the one identifier and the number of transmission layers and the port number;

the respective indication means that two identifiers (for example, two bits) respectively indicate the number of transmission layers used for transmitting the corresponding codeword and the port number used for transmitting the corresponding codeword in the codeword transmission indication information, in this case, the terminal may determine the number of transmission layers used for transmitting the corresponding codeword according to the identifier corresponding to the number of transmission layers, determine the port number used for transmitting the corresponding codeword according to the identifier corresponding to the port number, and obtain other information according to a mapping relationship between a preset number of transmission layers and other information, or indicate the information by an individual identifier, which is not limited herein. Alternatively, the first and second electrodes may be,

the codeword transmission indication information indicates transmission point indication information, the transmission point indication information may indicate separately (e.g., occupy one bit), and other information indicated together, for example, the number of transmission layers used for transmitting the corresponding codeword, the port number used for transmitting the corresponding codeword, and the scrambling identifier may jointly use a joint indication (e.g., occupy one bit), or may indicate separately (e.g., occupy bits, respectively), which is not limited herein. Alternatively, the first and second electrodes may be,

the codeword transmission indication information indicates transmission point indication information, and the terminal further learns the number of transmission layers and the port number according to the mapping relationship between the station and the number of transmission layers and the port number. Or, the terminal further learns the number of transmission layers used for transmitting the corresponding codeword according to a mapping relationship between the station and the number of transmission layers, and further determines the port number used for transmitting the corresponding codeword according to a preset rule, where the preset rule may be an increment rule, for example, when the number of transmission layers is layer 1, the port number is 7, and when the number of transmission layers is layer 2, the port number is 8, which is not limited herein, and may be other rules, such as adding or subtracting a preset number.

When the codeword transmission indication information indicates the data resource element mapping information and the quasi-co-located indication information, a method of joint indication and separate indication may also be used, which is not limited herein. When the joint indication is used to indicate the data resource element Mapping information and the Quasi-Co-Location indication information, a joint identifier may be used to indicate, for example, a PDSCH resource element Mapping and Quasi-Co-Location Indicator (PDSCH-RE-Mapping and Quasi-Co-Location Indicator) in an existing protocol.

For example, assuming that the control information is DCI, configuring one codeword transmission indication information for each codeword in one DCI, where the transmission indication information indicates one or more pieces of transmission-related information, assuming that the information is transmitted in a "DCI format 2D" format, where there are transport blocks 1 and transport blocks 2, each transport block maps one codeword, assuming that transport block 1 maps to codeword 0 and transport block 2 maps to codeword 1, for transport block 1: "the port number and the scrambling identifier used for transmitting the corresponding codeword and the number of transmission layers used for transmitting the corresponding codeword" occupy 3 bits, "the data resource element mapping information and the quasi-co-location indication information" occupy 2 bits; for the transport block 2, the number of port numbers, scrambling identifiers, and transport layers used for transmitting the corresponding codeword "occupies 3 bits, and the data resource element mapping information and quasi-co-location indication information" occupies 2 bits, but not limited thereto. It should be noted that the code word can be understood as an encoded transport block.

Specifically, the terminal side may pre-configure a mapping relationship between the codeword transmission indication information and the transmission related information, and/or a mapping relationship between the codeword resource block indication information and the time-frequency resource block.

And when the codeword indication information includes codeword transmission indication information, the terminal determines the transmission related information of the at least 2 codewords according to the codeword transmission indication information and a preset mapping relationship between the codeword transmission indication information and the transmission related information, where the transmission related information is information indicated by the codeword transmission indication information: the number of transmission layers used for transmitting the corresponding codeword, the port number used for transmitting the corresponding codeword, the scrambling identity, the data resource element mapping information, the quasi-co-location indication information, and the transmission point indication information.

Taking table 8 as an example, it is assumed that the control information includes 2 codeword indication information, which respectively corresponds to two codewords, and is marked as "codeword 0" and "codeword 1",

TABLE 8

In the example of table 8, the codeword transmission indication information has 8 different values, which may indicate 8 different cases, and specifically, 3 bits may be occupied in the control information, for example, "000" indicates that Value is 0, "001" indicates that Value is 1, but this is not a limitation, and more bits may be extended to indicate more cases, or fewer bits may be used when there are fewer cases. Taking "codeword indication information 1" as an example, 4 cases 0-3 of codeword transmission indication information indicate the number of transmission layers, port number and scrambling identity (n)_SCID) (ii) a 4-6 these 3 cases indicate the number of transport layers and port numbers. It is assumed that the codeword transmission indication information received by the terminal is '000'. According to the corresponding relationship shown in Table 8, 1layer, port 7, n can be obtained_SCID0, that is, the number of transmission layers used for transmitting the codeword 1 is 1layer, the port number used for transmitting the codeword 2 is 7, and the scrambling identifier n_SCID＝0。

It should be noted that, at least 2 codewords corresponding to the at least 2 codeword indication information may be from one station, or may be from multiple different stations, and the same codeword may also be from multiple different stations, for example, different stations transmit different layers of the same codeword respectively.

Further, the resource block indication information is used for indicating the resource block for transmitting the corresponding code word. I.e. resource blocks indicating transmission of the codeword corresponding to the codeword transmission indication information.

Optionally, since the resource may be sent in a sub-band, different code words may indicate resource blocks of corresponding code words by different resource indication information, where multiple code words may share information such as the number of layers, ports, and the like.

In addition, the resource blocks corresponding to the multiple codewords may be the same, and optionally, the resource block indication information may be indicated by the multiple codewords together, that is, the multiple codewords share one resource block indication information.

Further, the sending, by the network side device, the control information to the terminal may be: and the network side equipment determines a control channel format according to the format and/or the transmission mode of the control information, and then the network side equipment sends the control information according to the control channel format.

Optionally, the network side device may determine the control channel format according to a mapping relationship between the "format and/or transmission mode of the control information" and the control channel format.

The bit number of information that different formats of control information may carry may be different, the content of information that is carried may also be different, or the bit number used for the same information field may also be different. The different transmission modes may correspond to different transmission modes, for example, may correspond to single antenna transmission, transmit diversity transmission, multi-user MIMO transmission, closed-loop spatial multiplexing transmission, and the like.

It should be noted that the network side device determines the format of the control channel according to the format and/or the transmission mode of the control information, and mainly determines the aggregation level of the control channel according to the format and/or the transmission mode of the control information, where the aggregation level of the control channel may refer to a resource (e.g., Resource Element (RE)) used for transmitting information, and the higher the aggregation level, the more occupied REs. With the expansion of the control information, the information carried by the control information is more and more, when the bit number of the information carried by the control information exceeds a certain threshold value, the control information is more suitable for the control channel with the high aggregation level, and the control channel with the high aggregation level is adopted to send larger control information, so that the blind detection times of the terminal can be reduced.

Specifically, the format of the control information may adopt a form of an existing format plus a newly added format according to the embodiment of the present invention, and the newly added format may be a format including various situations of the aforementioned control information, for example, a format including "codeword indication information and/or codeword resource block indication information" is denoted as "DCI format 2E", which is not limited herein. Specifically, when the terminal decodes the new format, the terminal may obtain the corresponding indication information according to the corresponding bit in the codeword domain, and further obtain the content indicated by the indication information.

The Transmission Mode (TM) may be a current Transmission mode indicated to the network side device by the higher layer signaling. The transmission mode may refer to an existing transmission mode, or may be a transmission mode added in the embodiment of the present invention, for example, denoted as "TM 11". For example, for a newly added transmission mode of multi-point and multi-stream transmission, the network side device may perform multi-point and multi-stream transmission on the terminal in the newly added transmission mode.

The network side device may specifically use the PDCCH as a control channel for sending the control information to the terminal, but needs to determine the format of the PDCCH according to the format of the control information and/or the current transmission mode.

As shown in the table 9 below, the following examples,

TABLE 9

In table 9, it is assumed that there are 5 formats of control information, which are denoted as DCI format 2A-DCI format2E, and when the format of the control information is any of DCI format 2A-DCI format2D, any of PDCCH formats 0 to 3 may be used, and when the format of the control information is DCI format2E, PDCCH format 0 or 1 cannot be used. As shown in table 9, the resources of one PDCCH include: control Channel Element (CCE), number of resource element groups, and PDCCH bit number (i.e. the number of bits that can be carried by one PDCCH), it can be seen that, in PDCCH format 0 or 1, the resource of one PDCCH is less than the resource of the PDCCH in PDCCH formats 2 and 3, the number of information bits carried by DCI format2E is larger, and the maximum number of bits that can carry information of one PDCCH in PDCCH format 0 or 1 is smaller than the number of information bits carried by DCI format2E, or the code rate after carrying information carried by DCI format2E is larger than a certain threshold.

Assuming that there are 11 transmission modes, which may be denoted as TM1-TM11, any one of PDCCH formats 0-3 may be employed when the transmission mode is TM1-TM10, and PDCCH format 0 or 1 is not employed when the transmission mode is TM 11. As shown in table 9, the resources of one PDCCH include: control Channel Element (CCE), number of resource element groups, and PDCCH bit number (i.e., the number of bits that can be carried by one PDCCH), it can be seen that, in PDCCH format 0 or 1, the resource of one PDCCH is less than the resource of the PDCCH in PDCCH formats 2 and 3, the information bit number of control information that needs to be sent to the terminal is larger in TM11, and the maximum number of bits of information that can be carried by one PDCCH in PDCCH format 0 or 1 is smaller than the information bit number of control information that the terminal needs, or the code rate after carrying information of control information that the terminal needs is larger than a certain threshold.

In a specific implementation, the control channel format may be determined according to any one of the format and the transmission mode of the control information, or may be determined by combining the format and the transmission mode of the control information.

For example, the transmission mode is TM10, but the format of the control information is DCI format2E, then only PDCCH format2 or 3 is used, which is not limited herein.

Further, the receiving, by the terminal, the control information sent by the network side device may also include: and the terminal determines the control channel format according to the format and/or the transmission mode of the control information, and then receives the control information sent by the network side equipment according to the control channel format. Compared with the terminal blind detection control information, the terminal determines the control channel format in the same way as the network side equipment, so that the efficiency of receiving the control information by the terminal can be improved.

Specifically, the terminal determines the control channel format according to the format and/or transmission mode of the control information, and may determine the control channel format according to a mapping relationship between the "format and/or transmission mode of the control information" and the control channel format.

Or, the terminal receives the control channel format information notified by the network side device, and further receives the corresponding control information according to the received control channel format information.

Fig. 5 is a schematic structural diagram of a first embodiment of an apparatus for multi-site data transmission provided in the present invention, as shown in fig. 5, the apparatus may be the above network side device, and the apparatus may include: a processor 501, a transmitter 502, a receiver 503, a memory 504, an antenna 505.

The memory 504, the transmitter 502 and the receiver 503 may be connected to the processor 501 via a bus. Of course, in practical applications, the memory 504, the transmitter 502, the receiver 503 and the processor 501 may be not in a bus structure, but may be in other structures, such as a star structure, and the present application is not limited in particular.

Optionally, the processor 501 may be a general-purpose central processing unit or an Application Specific Integrated Circuit (ASIC), may be one or more Integrated circuits for controlling program execution, may be a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), and may be a baseband processor.

Optionally, processor 501 may include at least one processing core.

Optionally, the Memory 504 may include one or more of a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. Memory 504 is used to store data and/or instructions needed by processor 501 during operation. The number of the memories 504 may be one or more.

Optionally, the apparatus may further include a communication interface 506, also connected to other devices through the bus, for supporting the network device to communicate with other network devices in the communication system, such as a core network node.

The apparatus may be used to perform any of the method embodiments described above. Specifically, the method comprises the following steps:

a processor 501, configured to generate control information including at least 2 station indication messages, where the at least 2 station indication messages respectively indicate at least 2 stations that transmit data to a terminal, the at least 2 stations are non-quasi co-located stations, and the at least 2 stations are in one-to-one correspondence with the at least 2 station indication messages.

A transmitter 502, configured to transmit the control information to the terminal.

Further, the transmitter 502 is further configured to send configuration information to the terminal before sending the control information to the terminal, where the configuration information is used to indicate the number of at least 2 stations.

Optionally, the port numbers used by the at least 2 stations are different.

Optionally, the control information further includes: a mapping manner indication between at least 2 codewords and the at least 2 sites.

In addition, the processor 501 may determine a control channel format according to a format and/or a transmission mode of the control information; and a transmitter 502 for transmitting the control information to the terminal according to the control channel format.

Fig. 6 is a schematic structural diagram of a second apparatus for multi-site data transmission according to the present invention, and as shown in fig. 6, the apparatus may be the terminal, and the apparatus may include: processor 601, transmitter 602, receiver 603, memory 604, antenna 605.

The memory 604, the transmitter 602 and the receiver 603 and the processor 601 may be connected by a bus. Of course, in practical applications, the memory 604, the transmitter 602, the receiver 603 and the processor 601 may not be in a bus structure, but may be in other structures, such as a star structure, and the present application is not limited in particular. The functions and other information of these devices can refer to the embodiment in fig. 5, and are not described in detail here.

The receiver 603 is configured to receive control information sent by a network side device, where the control information includes at least 2 station indication messages.

A processor 601, configured to determine at least 2 stations for transmitting data according to the at least 2 station indication messages, where the at least 2 stations are non-co-located stations, and the at least 2 stations are in one-to-one correspondence with the at least 2 station indication messages.

The processor 601 is further configured to, before the receiver 603 receives the control information sent by the network side device, obtain the bit number of the control information according to the preset number of the at least 2 stations.

The receiver 603 is further configured to receive configuration information sent by a network side device before receiving control information sent by the network side device, where the configuration information is used to indicate the number of the at least 2 stations; correspondingly, the processor 601 is configured to obtain the bit number of the control information according to the number of the at least 2 stations.

Optionally, the receiver 603 receives control information sent by a network side device, specifically, receives the control information sent by the network side device according to the bit number of the control information.

the processor 601 is further configured to determine, according to the transmission parameter indication information and a mapping relationship between preset transmission parameter indication information and the number of transmission layers and port numbers of the at least 2 stations, the number of transmission layers and port numbers used by the at least 2 stations.

the processor 601 is further configured to determine the number of transmission layers used by the at least 2 stations according to the at least 2 pieces of transmission parameter indication information and a mapping relationship between preset transmission parameter indication information and the number of transmission layers.

the processor 601 is further configured to obtain, according to the port indication information and a mapping relationship between preset port indication information and a port number set, an available port number set allocated to each of the at least 2 sites; and determining the port numbers used by the at least 2 stations according to the available port number set allocated to each of the at least 2 stations and the number of transmission layers used by the at least 2 stations.

Further, the receiver 603 is further configured to receive data transmitted by the at least 2 stations to the terminal on the same time-frequency resource block.

Optionally, the processor 601 is further configured to obtain a data transmission mode with the at least 2 stations. Correspondingly, the receiver 603 receives control information sent by the network side device, specifically: and receiving the control information according to the data transmission mode.

Further, when the total number of transmission layers of the at least 2 stations is 2 or 4 and the data transmission mode is a transmission mode related to transmit diversity, the processor 601 is further configured to obtain mapping relationships between the preset single code words and the number of transmission layers used by the at least 2 stations, respectively, according to a mapping relationship between the preset single code words and the number of transmission layers.

Further, the control information further includes: a mapping manner between at least 2 codewords and the at least 2 stations; accordingly, the number of the first and second electrodes,

the processor 601 is further configured to obtain a mapping relationship between the at least 2 codewords and the at least 2 stations according to a mapping manner between the at least 2 codewords and the at least 2 stations.

The processor 601 is further configured to obtain the number of transmission layers corresponding to the at least 2 codewords according to the mapping relationship between the at least 2 codewords and the at least 2 stations and the number of transmission layers used by the at least 2 stations.

In one mode, the codeword indication information includes the codeword transmission indication information; the processor 601 is further configured to determine the transmission related information of the at least 2 codewords according to codeword transmission indication information in each codeword and a preset mapping relationship between the codeword transmission indication information and the transmission related information.

In another mode, the codeword indication information includes codeword resource block indication information; the processor 601 is further configured to determine, according to the codeword resource block indication information and a mapping relationship between preset codeword resource block indication information and a time-frequency resource block, a time-frequency resource block for transmitting the corresponding codeword.

Optionally, the processor 601 is further configured to determine a control channel format according to a format and/or a transmission mode of the control information; the receiver 603 is specifically configured to receive, according to the control channel format, control information sent by the network side device.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of multi-transmission point data transmission, comprising:

the method comprises the steps that network side equipment generates control information containing at least 2 transmission point indication messages, wherein the at least 2 transmission point indication messages respectively indicate at least 2 transmission points for transmitting data to a terminal, the at least 2 transmission points are non-quasi co-location transmission points, and the at least 2 transmission points are in one-to-one correspondence with the at least 2 transmission point indication messages;

and the network side equipment sends the control information to the terminal.

2. The method of claim 1, wherein the control information further comprises: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 transmission points.

3. The method of claim 1, wherein the control information further comprises: at least 2 transmission parameter indication information items, where the at least 2 transmission parameter indication information items are in one-to-one correspondence with the at least 2 transmission points, and the transmission parameter indication information is used to indicate the number of transmission layers used by the corresponding transmission points.

4. The method of claim 3, wherein the control information further comprises: port number set indication information indicating a set of port numbers available for allocation to the at least 2 transmission points.

5. The method of claim 4, wherein the set of port numbers comprises: the method comprises the following steps of allocating a port number set according to a preset port number sequence, or allocating the port number set according to a frequency division mode, or allocating the port number set according to a code division mode.

6. The method according to claim 2 or 4 or 5, wherein the at least 2 transmission points transmit data to the terminal on the same time-frequency resource block.

7. The method according to any of claims 1-5, wherein the control information further comprises: and code word and transmission point mapping mode indication information, configured to indicate a mapping mode between at least 2 code words and the at least 2 transmission points.

8. The method of claim 7, wherein the mapping between the at least 2 codewords and the at least 2 transmission points comprises any one or any combination of the following: each codeword corresponds to one transmission point, or each codeword corresponds to a plurality of transmission points, or a plurality of codewords correspond to one transmission point.

9. The method of claim 1, wherein the control information comprises: at least 2 codeword indication information, each of the codeword indication information corresponding to a codeword, the codeword indication information comprising: the code word transmission indication information and/or the code word resource block indication information;

10. The method according to any one of claims 1-5 and 8-9, wherein the sending, by the network-side device, the control information to the terminal comprises:

11. A method of multi-transmission point data transmission, comprising:

a terminal receives control information sent by network side equipment, wherein the control information comprises at least 2 transmission point indication messages;

the terminal determines at least 2 transmission points for transmitting data according to the at least 2 transmission point indication messages, wherein the at least 2 transmission points are non-quasi co-located transmission points, and the at least 2 transmission points are in one-to-one correspondence with the at least 2 transmission point indication messages.

12. The method of claim 11, wherein the control information further comprises: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 transmission points;

the method further comprises the following steps:

and the terminal determines the number of transmission layers and the port number used by the at least 2 transmission points according to the transmission parameter indication information and the mapping relation between the preset transmission parameter indication information and the number of transmission layers and the port number of the at least 2 transmission points.

13. The method of claim 11, wherein the control information further comprises: at least 2 pieces of transmission parameter indication information, wherein the at least 2 pieces of transmission parameter indication information correspond to the at least 2 transmission points one to one;

the method further comprises the following steps:

and the terminal determines the number of transmission layers used by the at least 2 transmission points according to the at least 2 pieces of transmission parameter indication information and the mapping relation between the preset transmission parameter indication information and the number of transmission layers.

14. The method of claim 13, wherein the control information further comprises: port number set indication information;

the method further comprises the following steps:

the terminal acquires a port number set which is available for each transmission point in the at least 2 transmission points according to the port indication information and the mapping relation between the preset port indication information and the port number set;

and the terminal determines the port numbers used by the at least 2 transmission points according to the available port number set allocated to each of the at least 2 transmission points and the number of transmission layers used by the at least 2 transmission points.

15. The method of claim 14, wherein the set of port numbers comprises: and allocating the port numbers according to a preset port number sequence, or allocating the port numbers according to a frequency division mode, or allocating the port numbers according to a code division mode.

16. The method according to claim 12, 14 or 15, wherein after the terminal determines at least 2 transmission points for transmitting data according to the at least 2 transmission point indication messages, the method further comprises:

and the terminal receives the data transmitted to the terminal by the at least 2 transmission points on the same time-frequency resource block.

17. The method of claim 11, wherein the control information further comprises: codeword to transmission point mapping mode indication information for indicating a mapping mode between at least 2 codewords and the at least 2 transmission points;

the method further comprises the following steps:

and the terminal acquires the mapping relation between the at least 2 code words and the at least 2 transmission points according to the mapping mode between the at least 2 code words and the at least 2 transmission points.

18. The method of claim 17, further comprising:

and the terminal acquires the transmission layer numbers respectively corresponding to the at least 2 code words according to the mapping relation between the at least 2 code words and the at least 2 transmission points and the transmission layer numbers used by the at least 2 transmission points.

19. The method according to claim 17 or 18, wherein the mapping manner between the at least 2 codewords and the at least 2 transmission point indication messages comprises any one or any combination of the following: each codeword corresponds to one transmission point, or each codeword corresponds to a plurality of transmission points, or a plurality of codewords correspond to one transmission point.

20. The method of claim 11, wherein when the total number of transmission layers of the at least 2 transmission points is 2 layers or 4 layers, and the data transmission mode is a transmission mode related to transmit diversity, the method further comprises:

and the terminal acquires the mapping relation between the preset single code word and the transmission layer number used by the at least 2 transmission points according to the mapping relation between the preset single code word and the transmission layer number.

21. The method of claim 11, wherein the control information comprises: at least 2 codeword indication information, each of the codeword indication information corresponding to a codeword, the codeword indication information comprising: the code word transmission indication information and/or the code word resource block indication information;

wherein the codeword transmission indication information is used to indicate any one or any combination of the following transmission related information: the number of transmission layers used for transmitting the corresponding code words, the port number used for transmitting the corresponding code words, scrambling identifiers, data resource element mapping information, quasi co-location indication information and transmission point indication information;

22. The method of claim 21, wherein the codeword indication information comprises the codeword transmission indication information, and wherein the method further comprises:

23. The method of claim 21, wherein the codeword indication information comprises codeword resource block indication information, the method further comprising:

24. The method according to any one of claims 11 to 15, 17 to 18, and 20 to 23, wherein the receiving, by the terminal, the control information sent by the network-side device includes:

25. An apparatus for multi-transmission point data transmission, comprising:

a processor, configured to generate control information including at least 2 transmission point indication messages, where the at least 2 transmission point indication messages respectively indicate at least 2 transmission points that transmit data to a terminal, the at least 2 transmission points are non-quasi-co-located transmission points, and the at least 2 transmission points correspond to the at least 2 transmission point indication messages one to one;

a transmitter for transmitting the control information to the terminal.

26. The apparatus of claim 25, wherein the control information further comprises: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 transmission points.

27. The apparatus of claim 25, wherein the control information further comprises: at least 2 transmission parameter indication information items, where the at least 2 transmission parameter indication information items are in one-to-one correspondence with the at least 2 transmission points, and the transmission parameter indication information is used to indicate the number of transmission layers used by the corresponding transmission points.

28. The apparatus of claim 27, wherein the control information further comprises: port number set indication information indicating a set of port numbers available for allocation to the at least 2 transmission points.

29. The apparatus of claim 28, wherein the set of port numbers comprises: the method comprises the following steps of allocating a port number set according to a preset port number sequence, or allocating the port number set according to a frequency division mode, or allocating the port number set according to a code division mode.

30. The apparatus of claim 26 or 28 or 29, wherein the at least 2 transmission points transmit data to the terminal on the same time-frequency resource block.

31. The apparatus according to any of claims 25-29, wherein the control information further comprises: and code word and transmission point mapping mode indication information, configured to indicate a mapping mode between at least 2 code words and the at least 2 transmission points.

32. The apparatus of claim 25, wherein the control information comprises: at least 2 codeword indication information, each of the codeword indication information corresponding to a codeword, the codeword indication information comprising: the code word transmission indication information and/or the code word resource block indication information;

33. The apparatus of any of claims 25-29, 32, wherein the processor is further configured to determine a control channel format according to a format and/or a transmission mode of the control information;

34. An apparatus for multi-transmission point data transmission, comprising:

the receiver is used for receiving control information sent by network side equipment, wherein the control information comprises at least 2 transmission point indication messages;

a processor, configured to determine at least 2 transmission points for transmitting data according to the at least 2 transmission point indication messages, where the at least 2 transmission points are non-quasi co-located transmission points, and the at least 2 transmission points are in one-to-one correspondence with the at least 2 transmission point indication messages.

35. The apparatus of claim 34, wherein the control information further comprises: transmission parameter indication information, where the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least 2 transmission points; accordingly, the number of the first and second electrodes,

the processor is further configured to determine, according to the transmission parameter indication information and a mapping relationship between preset transmission parameter indication information and the number of transmission layers and port numbers of the at least 2 transmission points, the number of transmission layers and port numbers used by the at least 2 transmission points.

36. The apparatus of claim 34, wherein the control information further comprises: at least 2 pieces of transmission parameter indication information, wherein the at least 2 pieces of transmission parameter indication information correspond to the at least 2 transmission points one to one; accordingly, the number of the first and second electrodes,

the processor is further configured to determine the number of transmission layers used by the at least 2 transmission points according to the at least 2 pieces of transmission parameter indication information and a mapping relationship between preset transmission parameter indication information and the number of transmission layers.

37. The apparatus of claim 36, wherein the control information further comprises: port number set indication information; accordingly, the number of the first and second electrodes,

the processor is further configured to obtain, according to the port indication information and a mapping relationship between preset port indication information and a port number set, a port number set available for each of the at least 2 transmission points; and determining the port numbers used by the at least 2 transmission points according to the available port number set allocated to each of the at least 2 transmission points and the number of transmission layers used by the at least 2 transmission points.

38. The apparatus of claim 34, wherein the control information further comprises: codeword to transmission point mapping mode indication information for indicating a mapping mode between at least 2 codewords and the at least 2 transmission points; accordingly, the number of the first and second electrodes,

the processor is further configured to obtain a mapping relationship between the at least 2 codewords and the at least 2 transmission points according to a mapping manner between the at least 2 codewords and the at least 2 transmission points.

39. The apparatus of claim 34, wherein the control information comprises: at least 2 codeword indication information, each of the codeword indication information corresponding to a codeword, the codeword indication information comprising: the code word transmission indication information and/or the code word resource block indication information;

40. The apparatus of claim 39, wherein the codeword indication information comprises the codeword transmission indication information;

41. The apparatus of claim 39, wherein the codeword indication information comprises codeword resource block indication information;

42. The apparatus of any of claims 34-41, wherein the processor is further configured to determine a control channel format according to a format and/or a transmission mode of the control information;