Method and apparatus for multi-transmission point data transmission

Abstract

Embodiments of the present application provide a method and device for multi-transmission point data transmission, the method comprising: generating, by a network side device, control information containing at least two transmission point indication messages, the at least two transmission point indication messages respectively indicating at least two transmission points for transmitting data to a terminal, the at least two transmission points being non-quasi co-located transmission points, and the at least two transmission points corresponding to the at least two transmission point indication messages one by one; and sending, by the network side device, the control information to the terminal. Thus, in a distributed MIMO scenario, the terminal can obtain transmission point indication messages corresponding to multiple non-quasi co-located transmission points, and the terminal can be indicated multiple non-quasi co-located transmission points for transmitting data, so that the terminal can receive data transmitted by the multiple non-quasi co-located transmission points.

Description

[0001] This application is a divisional application of the original application with the application number 201610480628.5 and the original filing date of June 27, 2016, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to wireless communication technology, and in particular to a method and apparatus for multi-transmission point data transmission. BACKGROUND

[0003] Multiple Input Multiple Output (MIMO) technology, also known as multi-antenna transmission, can improve system reliability through spatial diversity, system capacity through spatial multiplexing, and cell coverage through beamforming, and is considered one of the key technologies to achieve high-speed and high-quality data transmission in future mobile communications. It will have a broad application prospect in the 4th Generation (4G) and even the 5th Generation (5G) mobile communication system. Specifically, in Long Term Evolution (LTE) Release 10, a new transmission mode (transmission mode 9) is introduced to support 8-port Demodulation Reference Signal (DM-RS) and MIMO transmission. Specifically, to support 8-antenna transmission, the base station needs to indicate the number of transmission layers corresponding to the Physical Downlink Sharing Channel (PDSCH) and the antenna port number corresponding to the DM-RS in the control information carried by the Physical Downlink Control Channel (PDCCH). Specifically, it can be indicated in the Downlink Control Information (DCI) format 2C / 2D. Among them, the pre-coding technology applied by the sending end as one of the key technologies of MIMO can minimize the correlation of signals from different transmitting antennas reaching the user, minimize the interference of signals from different transmitting antennas to the receiving antenna, and maximize the array gain between multiple antennas.

[0004] In the prior art, in order to solve the inter-cell interference problem and improve the throughput of edge users, the Coordinated Multiple Points Transmission / Reception (CoMP for short) technology is proposed, and in order to support the CoMP technology, the antenna port quasi co-location (QCL for short) is introduced, wherein the signals emitted from the QCL antenna port will undergo the same large-scale fading. Further, the physical downlink shared channel resource element mapping and quasi co-location indicator (PQI for short) is introduced to indicate to the terminal which base station the PDSCH information is emitted from and which group of antenna ports the corresponding channel large-scale fading characteristics is consistent with. The terminal can obtain which group of DM-RS corresponding wireless channel parameters need to be used for demodulating the PDSCH by combining the PQI and the PDSCH mapping message element configured by the Radio Resource Control (RRC for short).

[0005] However, based on the traditional centralized MIMO, the DCI format 2D in the prior art only configures one group of QCL parameters, that is, the terminal can only receive the PDSCH information from one base station, and when the distributed MIMO is introduced, that is, multiple transmission antennas are distributed in different geographical positions, the terminal will possibly receive multiple PDSCH information from multiple non-QCL base stations at the same time. If the prior art is continued to be used, the PDSCH information from these non-QCL base stations cannot be indicated respectively, and the terminal cannot obtain the non-QCL base station transmitting the data. SUMMARY

[0006] Embodiments of the present application provide a multi-site data transmission method and device, which are used to solve the problem that the terminal cannot be indicated the multiple non-QCL base stations transmitting data to the terminal in the prior art.

[0007] The first aspect of the embodiments of the present application provides a multi-site data transmission method, comprising:

[0008] The network side device generates control information containing at least two site indication messages, wherein the at least two site indication messages respectively indicate at least two sites transmitting data to the terminal, the at least two sites are non-QCL sites, and the at least two sites correspond to the at least two site indication messages one by one.

[0009] The network side device sends the control information to the terminal.

[0010] Optionally, the site indication message can be an index number of a set of quasi co-location parameter configurations, and the terminal can determine the configuration parameters of the non-quasi co-located sites according to the index number.

[0011] Optionally, the site indication message can be a PQI, and the control information can be a DCI, without limitation.

[0012] In the embodiment, the network side device generates control information containing at least two site indication messages, and sends the control information to the terminal, so that the terminal can learn at least two non-quasi co-located sites for transmitting data to the terminal according to the at least two site indication messages in the control information, thereby realizing that the terminal can obtain the site indication messages corresponding to multiple non-quasi co-located sites in a distributed MIMO scenario, and realizing that multiple non-quasi co-located sites for transmitting data can be indicated to the terminal, so that the terminal can receive the data transmitted by the non-quasi co-located sites.

[0013] Optionally, before the network side device sends the control information to the terminal, the network side device further includes:

[0014] The network side device sends configuration information to the terminal, and the configuration information is used to indicate the number of at least two sites.

[0015] Optionally, the control information further includes transmission parameter indication information, and the transmission parameter indication information is used to indicate a set of transmission layer numbers and port numbers used by the at least two sites.

[0016] Alternatively, the control information further includes at least two transmission parameter indication information, and the at least two transmission parameter indication information corresponds to the at least two sites one by one, and the transmission parameter indication information is used to indicate the transmission layer number used by the corresponding site.

[0017] Further, the control information further includes port number set indication information, and the port number set indication information is used to indicate a set of port numbers allocated to the at least two sites.

[0018] The port number set can include a set of port numbers allocated according to a preset port number order, or a set of port numbers allocated according to a frequency division manner, or a set of port numbers allocated according to a code division manner, etc.

[0019] Optionally, the at least two sites transmit data to the terminal on the same time-frequency resource block. Further, the port numbers used by the at least two sites are different.

[0020] Correspondingly, the control information can further comprise a resource block assignment field indication, used for indicating time-frequency resource blocks for data transmission of the at least two sites.

[0021] In another embodiment, the control information further comprises codeword-to-site mapping indication information, used for indicating a mapping manner between the at least two codewords and the at least two sites.

[0022] The mapping manner between the at least two codewords and the at least two site indication messages comprises any one or any combination of the following: each codeword corresponds to one site, or each codeword corresponds to multiple sites, or multiple codewords correspond to one site. When the number of codewords is the same as the number of the at least two sites, each codeword can correspond to one site; when the number of codewords is less than the number of the at least two sites, each codeword can correspond to multiple sites; and when the number of codewords is greater than the number of the at least two sites, multiple codewords can correspond to one site, without limitation.

[0023] Optionally, the control information comprises at least two codeword indication information, each of the codeword indication information corresponding to one codeword, and the codeword indication information comprising codeword transmission indication information and / or codeword resource block indication information.

[0024] The codeword transmission indication information is used for indicating one or more of the following transmission-related information: the number of transmission layers used by the corresponding codeword, the port number used by the corresponding codeword, scrambling identification, data resource element mapping information, quasi-co-location indication information, and transmission point indication information.

[0025] The codeword resource block indication information is used for indicating time-frequency resource blocks of the corresponding codeword.

[0026] The scrambling identification is used for indicating scrambling information of data.

[0027] The data resource element mapping information is used for indicating data resource element mapping information.

[0028] The quasi-co-location indication information is used for indicating large-scale characteristics of antenna ports of a transmission point corresponding to the codeword.

[0029] The transmission point indication information is used for indicating a site corresponding to the codeword.

[0030] Optionally, the network-side device sends the control information to the terminal, comprising:

[0031] The network-side device determines a control channel format according to the format and / or transmission mode of the control information.

[0032] The network-side device sends the control information to the terminal according to the control channel format.

[0033] The second aspect of the embodiment of the present application provides a method for multi-site data transmission, comprising:

[0034] The network-side device generates control information containing transmission parameter indication information, which is used to indicate a set of transmission layer numbers used by at least two sites and port numbers; or

[0035] The network-side device generates control information containing at least two items of transmission parameter indication information, which corresponds to at least two sites one by one, and the transmission parameter indication information is used to indicate the transmission layer number used by the corresponding site. Optionally, the control information further comprises port number set indication information, which is used to indicate a set of port numbers available for the at least two sites.

[0036] The at least two sites are non-quasi co-sited sites.

[0037] The network-side device sends the control information to the terminal.

[0038] In the embodiment, the transmission layer number and the port number of the multiple non-quasi co-sited sites can be indicated to the terminal.

[0039] Other implementation manners in the embodiment can refer to the method for multi-site data transmission of the first aspect, which will not be described here.

[0040] The third aspect of the embodiment of the present application provides a method for multi-site data transmission, comprising:

[0041] The terminal receives the control information sent by the network-side device, and the control information comprises at least two site indication messages.

[0042] The terminal determines at least two sites for transmitting data according to the at least two site indication messages, wherein the at least two sites are non-quasi co-sited sites, and the at least two sites correspond to the at least two site indication messages one by one.

[0043] Optionally, the site indication message can be an index number of a set of quasi co-sited parameter configurations, and the terminal can determine the configuration parameters of the non-quasi co-sited sites according to the index number.

[0044] Optionally, before the terminal receives the control information sent by the network-side device, the method further comprises:

[0045] The terminal obtains the bit number of the control information according to the preset number of the at least two sites.

[0046] Optionally, before the terminal receives the control information sent by the network side device, the method further comprises:

[0047] The terminal receives configuration information sent by the network side device, wherein the configuration information is used to indicate the number of the at least two sites.

[0048] The terminal acquires the bit number of the control information according to the number of the at least two sites.

[0049] Optionally, the terminal receives the control information sent by the network side device, comprising:

[0050] The terminal receives the control information sent by the network side device according to the bit number of the control information.

[0051] Optionally, the control information further comprises transmission parameter indication information, wherein the transmission parameter indication information is used to indicate a group of transmission layer numbers and port numbers used by the at least two sites.

[0052] The method further comprises:

[0053] The terminal determines the transmission layer numbers and port numbers used by the at least two sites according to the transmission parameter indication information and a preset mapping relationship between transmission parameter indication information and transmission layer numbers and port numbers of the at least two sites.

[0054] Optionally, the control information further comprises at least two transmission parameter indication information, wherein the at least two transmission parameter indication information correspond to the at least two sites one by one.

[0055] Optionally, the method further comprises:

[0056] The terminal determines the transmission layer numbers used by the at least two sites according to the at least two transmission parameter indication information and a preset mapping relationship between transmission parameter indication information and transmission layer numbers.

[0057] Further, the control information further comprises port number set indication information.

[0058] Optionally, the method further comprises:

[0059] The terminal acquires a port number set available for each of the at least two sites according to the port indication information and a preset mapping relationship between port indication information and port number sets.

[0060] The terminal determines the port numbers used by the at least two sites according to the port number set available for each of the at least two sites and the transmission layer numbers used by the at least two sites.

[0061] The port number set comprises: a port number set allocated in a preset port number order, or a port number set allocated in a frequency division manner, or a port number set allocated in a code division manner.

[0062] Optionally, after the terminal determines the at least two stations according to the at least two station indication messages, the terminal further comprises:

[0063] The terminal receives data transmitted by the at least two stations to the terminal on the same time-frequency resource block.

[0064] Correspondingly, the control information can further comprise a resource block assignment (Resource Block Assignment) field indication, which is used to indicate the time-frequency resource block in which the at least two stations transmit data. The terminal can obtain the time-frequency resource block in which the at least two stations transmit data according to the resource block assignment field indication.

[0065] In this case, the port numbers used by each station are different.

[0066] Optionally, before the terminal receives the control information sent by the network side device, the terminal further comprises:

[0067] The terminal obtains a data transmission mode between the at least two stations.

[0068] Optionally, the terminal receiving the control information sent by the network side device comprises:

[0069] The terminal receives the control information according to the data transmission mode.

[0070] The control information further comprises codeword-to-station mapping mode indication information, which is used to indicate a mapping mode between the at least two codewords and the at least two stations.

[0071] Optionally, the method further comprises:

[0072] The terminal obtains a mapping relationship between the at least two codewords and the at least two stations according to the mapping mode between the at least two codewords and the at least two station indication messages.

[0073] Optionally, the terminal obtains a number of transmission layers corresponding to each of the at least two codewords according to the mapping relationship between the at least two codewords and the at least two stations and the number of transmission layers used by the at least two stations.

[0074] The mapping mode between the at least two codewords and the at least two station indication messages comprises 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.

[0075] Further, when the total number of transmission layers of the at least two sites is 2 layers or 4 layers and the data transmission mode is a transmission mode related to transmit diversity, the method further comprises:

[0076] The terminal obtains mapping relationships between the preset single code word and the number of transmission layers used by the at least two sites according to a preset mapping relationship between the single code word and the number of transmission layers.

[0077] Optionally, the control information comprises at least two code word indication information, each code word indication information corresponding to one code word, and the code word indication information comprises code word transmission indication information and / or code word resource block indication information.

[0078] The code word 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 word, the port number used for transmitting the corresponding code word, scrambling identification, data resource element mapping information, quasi co-site indication information and transmission point indication information.

[0079] The code word resource block indication information is used to indicate the time-frequency resource block for transmitting the corresponding code word.

[0080] Optionally, the code word indication information comprises the code word transmission indication information, and the method further comprises:

[0081] The terminal determines the transmission related information of the at least two code words according to the code word transmission indication information in each code word and a preset mapping relationship between the code word transmission indication information and the transmission related information.

[0082] Optionally, the code word indication information comprises code word resource block indication information, and the method further comprises:

[0083] The terminal determines the time-frequency resource block for transmitting the corresponding code word according to the code word resource block indication information and a preset mapping relationship between the code word resource block indication information and the time-frequency resource block.

[0084] Optionally, the terminal receives control information sent by the network side device, and the control information comprises:

[0085] The terminal determines the control channel format according to the format and / or transmission mode of the control information.

[0086] The terminal receives control information sent by the network side device according to the control channel format.

[0087] The fourth aspect of the embodiment of the application provides a multi-site data transmission method, which corresponds to the second aspect and comprises:

[0088] The terminal receives control information sent by the network side device, the control information comprising: transmission parameter indication information, the transmission parameter indication information being used to indicate a set of transmission layer numbers and port numbers used by at least two sites; or the control information comprising: control information of at least two items of transmission parameter indication information, port number set indication information, wherein the at least two items of transmission parameter indication information correspond to at least two sites one by one, the transmission parameter indication information being used to indicate a transmission layer number used by a corresponding site; and the port number set indication information being used to indicate a set of port numbers available for the at least two sites. The at least two sites are non-quasi co-located sites.

[0089] The terminal determines the transmission layer numbers and port numbers used by the at least two sites according to the control information.

[0090] Other implementation manners can be referred to the third aspect, and will not be described here.

[0091] The fifth aspect of the embodiment of the application provides a device for multi-site data transmission, comprising:

[0092] A processor is configured to generate control information comprising at least two site indication messages, the at least two site indication messages respectively indicating at least two sites transmitting data to a terminal, the at least two sites being non-quasi co-located sites, and the at least two sites corresponding to the at least two site indication messages one by one.

[0093] A transmitter is configured to send the control information to the terminal.

[0094] Optionally, the transmitter is further configured to send configuration information to the terminal before sending the control information to the terminal, the configuration information being used to indicate a number of the at least two sites.

[0095] In an implementation manner, the control information further comprises: transmission parameter indication information, the transmission parameter indication information being used to indicate a set of transmission layer numbers and port numbers used by the at least two sites.

[0096] In another implementation manner, the control information further comprises: at least two items of transmission parameter indication information, the at least two items of transmission parameter indication information corresponding to the at least two sites one by one, the transmission parameter indication information being used to indicate a transmission layer number used by a corresponding site.

[0097] Optionally, the control information further comprises: port number set indication information, the port number set indication information being used to indicate a set of port numbers available for the at least two sites.

[0098] The port number set includes: a port number set allocated in a preset port number order, or a port number set allocated in a frequency division manner, or a port number set allocated in a code division manner, but is not limited thereto.

[0099] Optionally, the at least two sites transmit data to the terminal on the same time-frequency resource block.

[0100] Optionally, the port numbers used by the at least two sites are different.

[0101] Optionally, the control information further includes: code word and site mapping manner indication information, used to indicate a mapping manner between at least two code words and the at least two sites.

[0102] The mapping manner between the at least two code words and the at least two sites includes any one or any combination of the following: each code word corresponds to one site, or each code word corresponds to multiple sites, or multiple code words correspond to one site.

[0103] Optionally, the control information includes: at least two code word indication information, each code word indication information corresponding to one code word, the code word indication information including: code word transmission indication information, and / or code word resource block indication information.

[0104] The code word transmission indication information is used to indicate one or more of the following transmission related information: a number of transmission layers used by a transmission corresponding code word, a port number used by the transmission corresponding code word, a scrambling identifier, data resource element mapping information, quasi co-location indication information, and transmission point indication information.

[0105] The code word resource block indication information is used to indicate a time-frequency resource block of a transmission corresponding code word.

[0106] 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.

[0107] The transmitter is specifically configured to transmit the control information to the terminal according to the control channel format.

[0108] The sixth aspect of the embodiment of the present application provides a multi-site data transmission device, including:

[0109] The receiver is configured to receive control information transmitted by a network side device, the control information including at least two site indication messages.

[0110] The processor is configured to determine at least two sites transmitting data according to the at least two site indication messages, wherein the at least two sites are non-quasi co-location sites, and the at least two sites correspond to the at least two site indication messages one by one.

[0111] Optionally, the processor is further configured to obtain the bit number of the control information according to the preset number of the at least two stations before the receiver receives the control information sent by the network-side device.

[0112] Optionally, the receiver is further configured to receive configuration information sent by the network-side device before receiving the control information sent by the network-side device, the configuration information being used to indicate the number of the at least two stations; and the processor is correspondingly configured to obtain the bit number of the control information according to the number of the at least two stations.

[0113] Further, the receiver receives the control information sent by the network-side device, specifically, receives the control information sent by the network-side device according to the bit number of the control information.

[0114] In an implementation form, the control information further comprises transmission parameter indication information, the transmission parameter indication information being used to indicate a set of transmission layer numbers and port numbers used by the at least two stations; and the processor is correspondingly configured to determine the transmission layer numbers and the port numbers used by the at least two stations according to the transmission parameter indication information and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers and the port numbers of the at least two stations.

[0115] The processor is further configured to determine the transmission layer numbers used by the at least two stations according to the at least two transmission parameter indication information and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers.

[0116] In another implementation form, the control information further comprises at least two transmission parameter indication information, the at least two transmission parameter indication information corresponding to the at least two stations one by one; and the processor is correspondingly configured to determine the transmission layer numbers used by the at least two stations according to the at least two transmission parameter indication information and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers.

[0117] The processor is further configured to determine the transmission layer numbers used by the at least two stations according to the at least two transmission parameter indication information and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers.

[0118] Optionally, the control information further comprises port number set indication information; and the processor is correspondingly configured to obtain the port number set available for each of the at least two stations according to the port indication information and a preset mapping relationship between the port indication information and the port number set.

[0119] The processor is further configured to obtain the port number set available for each of the at least two stations according to the port indication information and a preset mapping relationship between the port indication information and the port number set, and determine the port numbers used by the at least two stations according to the port number set available for each of the at least two stations and the transmission layer numbers used by the at least two stations.

[0120] The port number set comprises a port number set allocated according to a preset port number order, or a port number set allocated according to a frequency division manner, or a port number set allocated according to a code division manner.

[0121] The receiver is further configured to receive data transmitted by the at least two sites to the terminal on the same time-frequency resource block.

[0122] Optionally, the processor is further configured to acquire a data transmission mode between the at least two sites. Correspondingly, the receiver receives control information sent by the network-side device, and specifically, receives the control information according to the data transmission mode.

[0123] Further, when the total number of transmission layers of the at least two sites is 2 or 4, and the data transmission mode is a transmission mode related to transmit diversity, the processor is further configured to acquire a mapping relationship between preset single code words and the number of transmission layers used by the at least two sites, according to a mapping relationship between the preset single code words and the number of transmission layers.

[0124] Further, the control information further includes code word and site mapping mode indication information, used to indicate a mapping mode between at least two code words and the at least two sites; correspondingly,

[0125] The processor is further configured to acquire a mapping relationship between the at least two code words and the at least two sites, according to the mapping mode between the at least two code words and the at least two sites.

[0126] The processor is further configured to acquire the number of transmission layers corresponding to each of the at least two code words, according to the mapping relationship between the at least two code words and the at least two sites, and the number of transmission layers used by the at least two sites.

[0127] Optionally, the control information includes at least two code word indication information, each code word indication information corresponding to one code word, and the code word indication information includes code word transmission indication information and / or code word resource block indication information.

[0128] The code word transmission indication information is used to indicate one or more of the following transmission related information: the number of transmission layers used by a transmission corresponding code word, the port number used by a transmission corresponding code word, a scrambling identifier, data resource element mapping information, quasi co-site indication information, and transmission point indication information.

[0129] The code word resource block indication information is used to indicate a time-frequency resource block of a transmission corresponding code word.

[0130] Optionally, the code word indication information includes the code word transmission indication information.

[0131] The processor is further configured to determine the transmission related information of the at least two codewords according to codeword transmission indication information in each of the codewords and a preset mapping relationship between the codeword transmission indication information and the transmission related information.

[0132] Optionally, the codeword indication information comprises codeword resource block indication information.

[0133] The processor is further configured to determine time-frequency resource blocks corresponding to the codewords according to the codeword resource block indication information and a preset mapping relationship between the codeword resource block indication information and the time-frequency resource blocks.

[0134] Optionally, the processor is further configured to determine a control channel format according to the format and / or transmission mode of the control information.

[0135] The receiver is specifically configured to receive control information sent by a network side device according to the control channel format.

[0136] In a seventh aspect, an embodiment of the present application provides a multi-site data transmission apparatus, which comprises function modules for implementing the method in the first aspect.

[0137] In an eighth aspect, an embodiment of the present application further provides a multi-site data transmission apparatus, which comprises function modules for implementing the method in the second aspect.

[0138] In a ninth aspect, an embodiment of the present application further provides a multi-site data transmission apparatus, which comprises function modules for implementing the method in the third aspect.

[0139] In a tenth aspect, an embodiment of the present application further provides a multi-site data transmission apparatus, which comprises function modules for implementing the method in the fourth aspect.

[0140] In an eleventh aspect, an embodiment of the present application further provides a computer storage medium, which stores program codes, and the program codes comprise instructions for implementing any possible implementation manner of the method in the first aspect, the second aspect, the third aspect or the fourth aspect.

[0141] The method and device for multi-site data transmission provided by the embodiment of the present application, wherein the network side device generates control information containing at least two site indication messages, and sends the control information to the terminal, so that the terminal can learn at least two non-quasi co-sited sites for transmitting data to the terminal according to the at least two site indication messages in the control information, thereby realizing that the terminal can obtain the site indication messages corresponding to multiple non-quasi co-sited sites in the distributed MIMO scene, and realizing that the multiple non-quasi co-sited sites for transmitting data can be indicated to the terminal, so that the terminal can receive the data transmitted by the multiple non-quasi co-sited sites. BRIEF DESCRIPTION OF DRAWINGS

[0142] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0143] Figures 1-3 The application scenario diagram of the method for multi-transmission point data transmission provided by the present application is shown.

[0144] Figure 4 The flowchart of the first embodiment of the method for multi-transmission point data transmission provided by the present application is shown.

[0145] Figure 5 The structure diagram of the first embodiment of the device for multi-transmission point data transmission provided by the present application is shown.

[0146] Figure 6 The structure diagram of the second embodiment of the device for multi-transmission point data transmission provided by the present application is shown. DETAILED DESCRIPTION

[0147] The embodiment of the present application is based on CoMP technology, combined with MIMO technology, to realize that the terminal can receive data transmitted from multiple non-QCL base stations in the distributed MIMO scene. The embodiment of the present application is applicable to both homogeneous networks and heterogeneous networks, which is not limited here.

[0148] In the distributed MIMO scenario, multiple stations are distributed in different geographical locations, and a multi-point diversity cooperative transmission mode can be used, that is, the antennas distributed in two or more stations (also referred to as transmission points) transmit signals in a spatial-frequency block coding (SFBC) mode. Specifically, taking two stations as an example, there can be 2 antennas in each station, and the two stations generate one data stream by pre-coding respectively, and then the two data streams of the two stations are jointly subjected to SFBC of 2 antennas; or, there can be 2 antennas in each station, and the 4 antennas of the two stations are subjected to SFBC of 4 antenna ports and frequency switch transmit diversity (FSTD) together. There can also be a multi-point multi-stream cooperative transmission mode, that is, two or more stations independently pre-code and transmit different data streams and different code blocks to the same terminal. Of course, the transmission modes are not limited to the two modes.

[0149] The station in the embodiment of the application can be a base station (BTS) in a global system of mobile communication (GSM) or a code division multiple access (CDMA), can be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA), can be an evolved base station (eNB or eNodeB) in a long term evolution (LTE), or can be a relay station or an access point, or can be a base station in a future 5G network, and the like, and is not limited herein.

[0150] Further, the station in the embodiment of the application can be referred to as a "cooperative transmission point", which is a transmission point for cooperative transmission. One cooperative transmission point is a transmission point in a cooperative set, and can be a base station or a cell. Further, one cooperative transmission point can be a serving base station or a cooperative base station. One cooperative transmission point can also be a remote radio unit (RRU) in a distributed base station. The signals transmitted from any two transmission points in the multiple cooperative transmission points can pass through different large-scale fading characteristics (i.e., not quasi co-located), and can belong to the same cell or different cells, and are not limited. The large-scale characteristics include one or more of delay spread, Doppler spread, Doppler frequency shift, average channel gain, and average delay.

[0151] The terminal in this embodiment of the invention can be a wireless terminal or a wired terminal. A wireless terminal can be a device that provides voice and / or other service data connectivity to a user, such as a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device. These exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminals can also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, remote terminals, access terminals, user terminals, user agents, user devices, or user equipment, without any specific definition here.

[0152] Figures 1-3 This is a schematic diagram illustrating an application scenario of the multi-transmission point data transmission method provided by the present invention, such as... Figure 1 As shown, taking two cells as an example, namely two cells formed by two sites distributed in different geographical locations: cell1 and cell2, each site has two antennas. The two antennas of cell1 are denoted as cell1-1 and cell1-2, and the two antennas of cell2 are denoted as cell2-1 and cell2-2. All four antennas transmit signals to the terminal (UE) 01. The specific transmission method is not specifically limited here.

[0153] The two stations can be a service station and a cooperation station, or both can be service stations. The service station refers to a station to which a service cell belongs, and the cooperation station refers to a station to which a cooperation cell belongs. This is not limited.

[0154] As shown in Figure 2 The communication network system includes a first station, a second station, and a terminal.

[0155] The first station is a service network side device (may be a service station) of the terminal. The service network side device refers to a network side device that provides services such as RRC connection, non-access layer (English: non-access stratum, NAS) mobility management, and security input for the terminal through a wireless air interface protocol. The first station and the terminal can communicate through the air interface protocol. The number of second stations can be one or more, and they are network side devices that satisfy different QCLs with the first station. Generally, the second station is located in a different geographical location from the first station. Usually, the second station is a neighboring network side device of the first station. The second station can also transmit data through the air interface protocol. The second station is used to assist the first station to jointly transmit data to the terminal, such as multi-stream transmission or diversity transmission, so the second station can also be called a cooperation network side device. The first station and the second station can also communicate, such as transmitting control messages and / or indication information.

[0156] In actual use, the first station can also be a cooperation network side device, and the second station is a service network side device.

[0157] On the other hand, the first station and the second station can be different transmission points of the same device, such as two radio units (English: Radio Unit, RU) or radio heads (English: Radio Head, RH) that are far apart, or two completely independent network side devices, such as two base stations.

[0158] In an embodiment of the present application, the first station and the second station simultaneously transmit data to the terminal, which includes two meanings. The first layer meaning is that the first station and the second station transmit data to the terminal on the same time domain resource. The second layer meaning is that the first station and the second station transmit data to the terminal on different time domain resources.

[0159] It should be noted that in CoMP transmission, it is assumed that the wireless channels traversed by the multiple antenna port signals received by the terminal have the same large-scale characteristics, meaning that these multiple antenna ports belong to the same QCL set. Therefore, for two network-side devices with different wireless channels from the terminal, if they simultaneously transmit data to the terminal-side device, the antennas in the two network-side devices need to be jointly virtualized to form an antenna port that satisfies the QCL constraints. Demodulation reference signals and data are then transmitted on this antenna port. One method of joint virtualization is SFN technology, where the first antenna port in the antenna set of the first site and the second antenna port in the antenna set of the second site are combined into a single antenna port. Data transmitted from this antenna port consists of the first and second antennas transmitting the same modulation symbols in the same time-frequency resources.

[0160] In the context of the first meaning, the antenna ports in the first antenna port set used by the first station in this embodiment are different from those in the second antenna port set used by the second station. In other words, the first antenna port set belongs to one QCL set, and the second antenna port set belongs to another QCL set; these two QCL sets are non-QCL. In this embodiment, data can be transmitted to the terminal on the same time-domain symbol through two non-QCL antenna ports.

[0161] In the second sense, although the first station and the second station will transmit data on different time domain symbols, antenna ports are pre-assigned in this embodiment, and the first antenna port set used by the first station is not exactly the same as the antenna ports in the second antenna port set used by the second station.

[0162] like Figure 3 As shown, with Figure 2 The scenario shown differs in that both the first and second stations are connected to the centralized scheduler simultaneously. The first and second stations do not need to communicate directly; instead, the control messages and / or indication information are all issued by the centralized scheduler to both stations.

[0163] In actual deployment, the centralized scheduler can be a standalone physical device, a functional module integrated on the first site, or a functional module integrated on other devices; this is not limited in the embodiments of the present invention.

[0164] It should be understood that Figure 2 and Figure 3 The communication system shown depicts only one terminal (isolated terminal) and two sites, but the invention is not limited to this. The communication system may also include neighboring sites and terminals transmitting services on the same time-frequency resources, in addition to these two sites. Furthermore, the coverage area of ​​each network-side device may include other numbers of terminals. Further optional, Figure 2 and Figure 3 The communication system in which the sites and the terminal are located can further include other network entities such as a network controller and / or a mobility management entity, and embodiments of the present application are not limited in this respect.

[0165] Figure 4 A flowchart of an embodiment of a method of multi-transmission point data transmission provided by the present application is shown in FIG. 1, which includes the following steps: Figure 4

[0166] In S101, a network-side device generates control information containing at least two site indication messages, which respectively indicate at least two sites for transmitting data to a terminal, and the at least two sites are non-quasi co-sited sites.

[0167] In the above, the at least two sites correspond to the at least two site indication messages one-to-one, that is, the network-side device configures as many site indication messages as the number of non-quasi co-sited sites for transmitting data to the terminal. The site indication message can be an index number of a set of quasi co-sited parameter configurations, and the terminal can determine the configuration parameters of the non-quasi co-sited sites according to the index number.

[0168] It should be noted that the network-side device can be one of the at least two sites, specifically, a serving site of the at least two sites, but embodiments of the present application are not limited in this respect.

[0169] The site indication message can be a PQI. Taking two non-quasi co-sited sites as an example, assuming that one is a serving site and the other is a cooperating site, they can be indicated by PQI0 and PQI1 respectively, and then the control information containing the at least two site indication messages is generated.

[0170] In S102, the network-side device sends the control information to the terminal.

[0171] For example, in a specific implementation process, the control information can be a DCI, specifically a DCI of format 2D or 2C. Taking a DCI of format 2D as an example, one or more bits can constitute a site indication message, and taking two bits as an example, the values of the two bits represent the index numbers of different quasi co-sited parameter configurations, that is, the values of the PQI field, for example, as shown in Table 1:

[0172] Table 1

[0173] The value of the PQI field describe '00' High-level configuration parameter group 1 '01' High-level configuration parameter group 2 '10' High-level configuration parameter group 3 '11' High-level configuration parameter group 4

[0174] ​Specifically, in the control information, each station corresponding station indication message can be arranged in a preset order. Assuming that there are two stations, indicated by PQI0 and PQI1 respectively, for example, PQI0 is 00 and PQI1 is 01, then the two station indication messages in the control information are recorded as "0001".

[0175] Of course, the above examples are not limited, each station indication message can occupy one or more bits, and the above at least two station indication messages can be arranged in a certain order.

[0176] S103, the terminal receives the control information sent by the network side device.

[0177] S104, the terminal determines at least two stations for transmitting data according to the at least two station indication messages.

[0178] For example, there are two station indication messages PQI0 and PQI1 corresponding to two stations, each occupying two bits, so the terminal can read the two bits of PQI0 first, for example, "00", and then read the two bits of PQI1, for example, "01", but this is not limited.

[0179] The terminal can obtain the information of at least two non-quasi co-located stations for transmitting data of the terminal according to the at least two station indication messages in the control information, and then the terminal can receive the data transmitted by the at least two stations.

[0180] In this embodiment, the network side device generates control information containing at least two station indication messages, and sends the control information to the terminal, so that after the terminal receives the control information, it can obtain at least two non-quasi co-located stations for transmitting data of the terminal according to the at least two station indication messages in the control information, so as to realize that in a distributed MIMO scenario, the terminal can obtain the station indication messages corresponding to multiple non-quasi co-located stations, and realize that multiple non-quasi co-located stations for transmitting data can be indicated to the terminal, so that the terminal can receive the data transmitted by the non-quasi co-located stations.

[0181] It should be noted that the terminal may adopt a blind detection method when receiving the above control information, so before the terminal receives the control information sent by the network side device, the terminal also needs to know the size of the control information, so as to facilitate the terminal to receive the control information, that is, the terminal needs to perform blind detection according to the size of the control information. Specifically, the terminal can obtain the size of the control information according to the number of the at least two stations.

[0182] Optionally, in one way, the network side device pre-configures the number of sites for the terminal to transmit data, and the terminal also pre-knows the number of site indication messages in the control information, and also knows the size of the control information, i.e., the terminal acquires the bit number of the control information according to the pre-set number of the at least two sites.

[0183] Optionally, in another way, the network side device dynamically indicates the number of sites for the terminal to transmit data through high layer signaling, i.e., indicates the number of site indication messages in the control information, and the terminal dynamically calculates the size of the control information, i.e., the terminal receives the configuration information sent by the network side device, the configuration information is used to indicate the number of the at least two sites, and then the terminal acquires the bit number of the control information according to the number of the at least two sites. In this dynamic indication way, the network side device considers the receiving capability of the terminal to determine the number of sites for the terminal to transmit data, which is more flexible.

[0184] Correspondingly, the terminal receives the control information sent by the at least two sites according to the bit number of the control information.

[0185] Optionally, before the terminal receives the control information sent by the network side device, the terminal can also acquire the data transmission mode of the at least two sites. The data transmission mode can be a multi-point diversity cooperation transmission mode, a multi-point multi-flow cooperation transmission mode, etc., which is not limited here.

[0186] After the terminal knows the data transmission mode, the terminal can also know the size of the control information and other information, and then the terminal can blindly detect the control information.

[0187] On the basis of the above embodiments, the terminal also needs to be indicated the number of transmission layers and port numbers used by the at least two sites. It should be noted that in the multi-antenna system of LTE, different logical ports are defined to distinguish different channels, mainly divided into three categories:

[0188] 1) Cell-specific Reference Signal (CRS) is the most basic downlink reference signal in LTE. In a cell, there can 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 specifically refer to antenna ports with port numbers 0-3.

[0189] 2) User-specific reference signal, such as DM-RS, is specifically used for channel estimation of PDSCH in transmission modes 7-10. In the LTE specification, the terminal can configure up to 8 different PDSCH DM-RS on antenna ports with port numbers 7-14.

[0190] 3) CSI reference signal (Channel State Information Reference Signal, CSI-RS) is used by the terminal to acquire CSI in the case of transmission modes 9 and 10. In the LTE specification, the antenna ports corresponding to the CSI-RS are specifically the antenna ports with port numbers 15-22.

[0191] The port numbers mentioned in the embodiments of the present application generally refer to port numbers 7-14, but are not limited thereto.

[0192] Optionally, the control information can further include transmission parameter indication information, which is used to indicate a set of transmission layer numbers and port numbers used by the at least two sites.

[0193] Specifically, one or more bits in the control information can be used as the transmission parameter indication information, and the bit value of the transmission parameter indication information indicates a set of transmission layer numbers and port numbers used by the at least two sites. Each set of transmission layer numbers and port numbers corresponding to the at least two sites can have an index number, and the binary value of the index number can be used as the transmission parameter indication information.

[0194] Taking two sites as an example, for example, "0" indicates that the transmission layer number used by the first site is 1 layer, and the port number is 7 (1 layer, port 7), and the transmission layer number used by the second site is 1 layer, and the port number is 8 (1 layer, port 8).

[0195] For example, the transmission parameter indication information can have 16 values as shown in Table 2, which respectively identify 16 sets of transmission layer numbers and port numbers used by the at least two sites.

[0196] Table 2

[0197]

[0198] The allocation manner shown in Table 2 is sequentially allocated according to the size of the port number, and the size of the index of the site indication message PQI (PQI0 and PQI1), which is not limited, and the available ports can be divided into multiple groups (which can be divided into groups according to the number of the above-mentioned at least two sites, that is, 2 groups for a total of 2 sites), and the grouping can be performed in a code division manner, that is, each port number in each group is distinguished by an orthogonal cover code (OCC). Taking 2 groups as an example, assuming that the port numbers 7, 8, 11, and 13 are in the same frequency domain, and the port numbers 9, 10, and 14 are in the same frequency domain, the two groups of port numbers are allocated to the two sites respectively, and then allocated according to the number of transmission layers corresponding to each site, for example, the first site uses 3 layers of transmission layers, and the port numbers 7, 8, and 11 can be selected in sequence from the port numbers 7, 8, 11, and 13; the second site uses 2 layers of transmission layers, and the port numbers 9 and 10 can be selected from the port numbers 9, 10, 12, and 14.

[0199] In addition, the port numbers can also be divided in a frequency division manner, that is, the port numbers are divided into multiple groups according to different frequency domain resources, each group corresponds to a site, and then the port numbers are allocated in sequence according to the number of transmission layers of the site, for example, the port numbers 7, 8, 11, and 13 are allocated to the first site, and the port numbers 9, 10, 12, and 14 are allocated to the second site, which can be referred to the example of Table 3, and the number of transmission layers and the port numbers of a group of at least two sites corresponding to each transmission parameter indication information can be allocated, but not limited to:

[0200] Table 3

[0201]

[0202] Correspondingly, the terminal side can be pre-configured with the mapping relationship between the transmission parameter indication information and the number of transmission layers and the port numbers of the above-mentioned at least two sites, for example, a mapping table similar to Table 3 can be pre-set, and then the terminal determines the number of transmission layers and the port numbers used by the above-mentioned at least two sites according to the above-mentioned transmission parameter indication information and the mapping relationship between the preset transmission parameter indication information and the number of transmission layers and the port numbers of the above-mentioned at least two sites. For example, the terminal receives control information in which the transmission parameter indication information is 15, and the terminal can know that the first site corresponding to "15" uses 4 layers of transmission layers and the ports of the port numbers 7-10, and the second site corresponding to "15" uses 4 layers of transmission layers and the ports of the port numbers 11-14 according to the mapping relationship between the preset transmission parameter indication information and the number of transmission layers and the port numbers of the above-mentioned at least two sites.

[0203] Optionally, in an embodiment, the above-mentioned control information can only include the above-mentioned transmission parameter indication information according to the indication requirement.

[0204] Optionally, in another implementation, the control information further comprises at least two pieces of transmission parameter indication information, the at least two pieces of transmission parameter indication information correspond to the at least two sites respectively, and the at least two pieces of transmission parameter indication information are used to indicate the number of transmission layers used by the at least two sites respectively.

[0205] That is, in this embodiment, a plurality of transmission parameter indication information can be used to indicate the number of transmission layers of one site, and when a plurality of sites are indicated, the transmission parameter indication information can be arranged in a certain order, so that the terminal can identify the transmission parameter indication information corresponding to each site according to the preset order, and further identify the number of transmission layers corresponding to each site.

[0206] As shown in Table 4:

[0207] Table 4

[0208] Transmission parameter indication information Transport Layer 00 1layers 01 2 layers 10 3layers 11 4 layers

[0209] Specifically, the site indication message can use one or more bits as transmission parameter indication information, and different values of the transmission parameter indication information indicate different numbers of transmission layers. Referring to Table 4, for example, “00” indicates 1 layer, and “01” indicates 2 layers. Specifically, assuming that the transmission layer number of the serving site identified by “00” is 1 layer, and the transmission layer number of the cooperating site identified by “01” is 2 layers, the transmission parameter indication information “0001” can be used to indicate the transmission layer numbers corresponding to the two sites respectively in the control information.

[0210] In a specific implementation process, this method can also be used to correspond to the number of transmission layers and the port number, for example, “00” indicates “1 layer transmission layer, port number 7”, and “01” indicates “2 layer transmission layer, port number 8, 9”. Then the transmission parameter indication information “0001” can be used to indicate that the two sites correspond to “1 layer transmission layer, port number 7” and “2 layer transmission layer, port number 8, 9” respectively. Of course, this is not limiting.

[0211] In this implementation, the control information can also increase a special bit to indicate the port number used by the at least two sites. Specifically, there can be various indication methods, for example, increasing port number indication information, and different port number indication information corresponds to different port numbers.

[0212] More preferably, in order to save resources, the control information comprises port number set indication information, which occupies one or more bits, and different values indicate different port number sets.

[0213] Optionally, the port number set can include: the port number set includes a port number set allocated in a preset port number order, or a port number set allocated in a frequency division manner, or a port number set allocated in a code division manner, but not limited to these allocation manners. The port number allocated in the preset port number order is allocated in the order of the size of the port number; the port number allocated in the frequency division manner is first divided into multiple groups according to different frequency domain resources, each group corresponding to a station, and then the port number is allocated in order according to the transmission layer number of the station; the port number allocated in the code division manner is mainly allocated in the code division manner on the same frequency domain resource, that is, the port number on the same frequency domain resource is allocated to different stations, that is, the DMRS parameter signal corresponding to the port used by each station is ensured to be orthogonal between reference signals in a code division manner (specifically, an OCC manner can be used).

[0214] For example, assuming that the port number set indication information is 1 bit, "0" and "1" respectively indicate two port number sets, for example, the port number set indication information "0" indicates "the port number is allocated in the preset port number order", and the port numbers 7-14 are taken as an example, the transmission layer number of the first station is two layers, and the corresponding allocated port numbers are 7 and 8, and the transmission layer number of the second station is 3 layers, and the corresponding allocated port numbers are 9, 10 and 11.

[0215] For example, the port number set indication information "1" indicates "the port number is allocated in the frequency division manner", that is, the port number is divided into multiple groups according to different frequency domain resources, assuming that the above at least two stations are two stations, the port number is divided into two groups according to different frequency domain resources, for example, one group is 7 / 8 / 11 / 13, and the other group is 9 / 10 / 12 / 14, each group is allocated to a station, and then the corresponding port is allocated in order according to the transmission layer number of each station, for example, the first station corresponds to the port number 7 / 8 / 11 / 13, and the transmission layer number of the first station is two layers, so the corresponding allocated port numbers are 7 and 8; the second station corresponds to the port number 9 / 10 / 12 / 14, and the transmission layer number of the second station is 3 layers, so the corresponding allocated port numbers are 9, 10 and 12.

[0216] Of course, the port number set indication information can also be "1" to indicate "allocate port numbers in code division mode". Assuming that port numbers 7 / 8 / 11 / 13 are in the same frequency domain resource and port numbers 9 / 10 / 12 / 14 are in the same frequency domain resource, then the port numbers 7 / 8 / 11 / 13 are allocated to different stations, and the port numbers 9 / 10 / 12 / 14 are also allocated to different stations. Taking two stations as an example, the port numbers 7, 9, 13, and 14 can be allocated to the first station, and the port numbers 8, 10, 11, and 12 can be allocated to the second station. For example, the first station is a 2-layer transmission layer, and the port numbers 7 and 13 can be allocated to the first station. The second station is also a 2-layer transmission layer, and the port numbers 8 and 11 can be allocated to the second station, but this is not limited thereto.

[0217] Correspondingly, the terminal determines the transmission layer number used by the at least two stations according to the at least two transmission parameter indication information and the mapping relationship between the preset parameter transmission indication information and the transmission layer number. That is, the terminal has a preset mapping relationship between the preset parameter transmission indication information and the transmission layer number, and the terminal receives the at least two transmission parameter indication information in the control information, and finds a match in the mapping relationship between the preset parameter transmission indication information and the transmission layer number, so as to determine the transmission layer number used by each station.

[0218] Similarly, the terminal can obtain the port number set available to each station in the at least two stations according to the port number indication information and the mapping relationship between the preset port indication information and the port number set.

[0219] Further, the terminal can determine the port number used by the at least two stations according to the port number set available to each station in the at least two stations and the transmission layer number used by the at least two stations. That is, after the terminal knows the port number set available to each station, the terminal can also determine the port number of the station according to the transmission layer number used by the station. For example, the terminal knows that the port numbers are allocated in sequence, the transmission layer number of the first station is 2 layers, and then the port numbers of the first station are 7 and 8. The transmission layer number of the second station is 3 layers, and then the port numbers of the second station are 9, 10, and 11.

[0220] Optionally, in an embodiment, the control information can only include the at least two transmission parameter indication information according to the indication requirement. Alternatively, the control information can only include the at least two transmission parameter indication information and the port number set indication information. This is not limited herein.

[0221] Further, the control information can also include codeword and station mapping mode indication information for indicating the mapping mode of the at least two codewords and the at least two stations.

[0222] In the embodiment of the present application, the multi-site cooperative transmission data, the total transmission layers are generally greater than 1 layer, thus generally corresponding to one or more code words, the mapping relationship between the code word and the above-mentioned at least two sites can be any one or any combination of the following: each code word corresponds to a site, or each code word corresponds to multiple sites, or multiple code words correspond to a site, which is not limited here.

[0223] In the specific implementation process, when the number of the above-mentioned at least two sites is the same as the number of code words, each code word generally corresponds to a site, for example, there are two code words CW0 and CW1, and there are also two sites: the first site and the second site, then CW0 and the first site correspond, and CW1 and the second site correspond. When the number of the above-mentioned at least two sites is greater than the number of code words, each code word can correspond to multiple sites, and the specific corresponding mode is not limited here, for example, a polling mode can be used, assuming that there are two code words CW0 and CW1, and there are three sites, then CW0 and the first site correspond, CW1 and the second site correspond, and further CW0 also corresponds to the third site, that is, CW0 (Codeword 0) corresponds to 2 sites, and CW1 corresponds to one site. When the number of the at least two sites is less than the number of code words, multiple code words can correspond to one site, which is not limited here. A specific corresponding mode can refer to Table 5, but is not limited to Table 5:

[0224] Table 5

[0225]

[0226] Correspondingly, the terminal can obtain the mapping relationship between the at least two code words and the at least two sites according to the mapping mode between the at least two code words and the at least two sites.

[0227] Further, the terminal can obtain the transmission layer number corresponding to each of the at least two code words according to the mapping relationship between the at least two code words and the at least two sites and the transmission layer number used by the at least two sites.

[0228] Optionally, when the total transmission layer number of the above-mentioned at least two sites is 2 layers or 4 layers, and the above-mentioned data transmission mode is a transmission mode related to transmit diversity, a single code word mode can be used, that is, there is only one code word, which corresponds to the total transmission layer number of 2 layers or 4 layers. In this case, the mapping relationship between the preset single code word and the transmission layer number can be directly preset in the terminal, and there is no need for the network side device to indicate again, that is, the terminal can obtain the mapping relationship between the preset single code word and the transmission layer number used by the at least two sites according to the preset mapping relationship between the single code word and the transmission layer number.

[0229] It should be noted that the transmission mode related to the transmit diversity can include a multi-point diversity cooperative transmission mode, or other new transmission modes, as long as the transmission mode is similar to the transmit diversity, and the present application is not limited in this regard.

[0230] In the case where the total number of transmission layers of the at least two stations is 2 or 4, and the data transmission mode is the transmission mode related to the transmit diversity, for the mode including one transmission parameter indication information, the transmission parameter indication information only needs to indicate the case of the number of transmission layers being 2 or 4, and a smaller number of bits can be used, for example, but not limited to, Table 6:

[0231] Table 6

[0232]

[0233] For the mode including at least two transmission parameter indication information, only the case of the number of transmission layers of a single station being 1 or 2 needs to be indicated. For example, but not limited to, Table 7:

[0234] Table 7

[0235] Transmission parameter indication information Transport Layer '0' 1layer '1' 2 layers

[0236] Optionally, on the basis of the above embodiment, the terminal can receive data transmitted by the at least two stations to the terminal. The at least two stations can transmit data to the terminal on the same time-frequency resource block, in which case the port numbers used by each station are different, and the port numbers of each station can be staggered, and the specific allocation is not limited herein.

[0237] Optionally, the control information can further include resource block assignment (Resource Block Assignment) field indication, which is used to indicate the time-frequency resource block in which the at least two stations transmit data. The terminal can obtain the time-frequency resource block in which the at least two stations transmit data according to the resource block assignment field indication.

[0238] In the embodiment of the present application, the at least two non-quasi co-located stations that transmit data to the terminal are further indicated, and the port, the number of transmission layers, the codeword, and the like are also indicated, so that the terminal can further obtain the port number, the number of transmission layers, the codeword, and the like corresponding to each station, thereby better realizing the multi-station cooperative transmission of data to the terminal in the distributed MIMO scenario.

[0239] Optionally, the control information can include at least two codeword indication information, each codeword indication information corresponding to one codeword. Each codeword indication information includes codeword transmission indication information, and / or resource block indication information.

[0240] In this embodiment, the domain of the code word is extended, and the terminal is further indicated with the code word indication information.

[0241] The code word transmission indication information is used to indicate one or more of the following transmission related information: the number of transmission layers used for the transmission of the code word, the port number used for the transmission of the code word, the scrambling identity, the data resource element mapping information, the quasi co-location indication information, and the transmission point indication information.

[0242] The scrambling identity is used to indicate the scrambling information of the data. For example, the scrambling identity can be carried by high layer signaling. Alternatively, the scrambling identity can be a cell identity or a virtual identity, which is not limited herein. The virtual identity can refer to a common identity negotiated by multiple cells, which is not limited herein.

[0243] The data resource element mapping information is used to indicate the information of the data resource element mapping. For example, it can include the mapping resource element information of the reference signals such as CRS, channel state information-reference signal (CSI-RS), and demodulation reference signal (DMRS). The terminal can determine the resource elements to which the data can be mapped through the data resource mapping indication. For example, the data resource mapping indication includes the cell identity (ID) of the cooperating base station or the CRS offset. The terminal can know the resource elements of the CRS transmitted by the network side device according to the cell identity of the cooperating base station or the CRS offset, so as to avoid the terminal decoding the physical downlink shared channel (PDSCH) on the resource elements (REs).

[0244] The quasi co-location indication information is used to indicate the large-scale characteristics of the antenna port of the site transmitting the code word. That is, it indicates the large-scale characteristics of the antenna port of the site transmitting the code word corresponding to the code word transmission indication information. The large-scale characteristics can include one or more of the delay spread, the Doppler spread, the Doppler frequency shift, the average channel gain, and the average delay. Specifically, the quasi co-location indication information can indicate the relationship of the large-scale characteristics of the CRS antenna port or the relationship of the large-scale characteristics of the CSI-RS antenna port, or other indication manners.

[0245] The transmission point indication information is used to indicate the site transmitting the code word. That is, it indicates the site transmitting the code word corresponding to the code word transmission indication information.

[0246] It should be noted that the network side device indicates one or both of the code word transmission indication information and the resource block indication information according to needs, wherein the code word transmission indication information also indicates a combination of one or any number of the above-mentioned information, for example:

[0247] The code word transmission indication information only indicates any of the following: the number of transmission layers used for transmitting the corresponding code word, the port number used for transmitting the corresponding code word, the scrambling identifier, the data resource element mapping information, the quasi co-location indication information, and the transmission point indication information; or the code word 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 code word transmission indication information indicates the number of transmission layers used for transmitting the corresponding code word and the scrambling identifier; or the code word transmission indication information indicates the number of transmission layers used for transmitting the corresponding code word and the data resource mapping identifier, etc. Of course, it is not limited to the above-mentioned cases, and any combination can be made.

[0248] It should be noted that when the code word transmission indication information indicates part of the information of the number of transmission layers used for transmitting the corresponding code word, the port number used for transmitting the corresponding code word, the scrambling identifier, the data resource element mapping information, the quasi co-location indication information, and the transmission point indication information, other information in these information except the part indicated by the code word transmission indication information can be indicated by other identification information or special information, etc., which is not limited herein.

[0249] Specifically, the code word transmission indication information only indicates the number of transmission layers used for transmitting the corresponding code word, in which case the terminal side can preset the mapping relationship between the number of transmission layers and the port number, and then the terminal can obtain the port number used for transmitting the corresponding code word according to the mapping relationship between the number of transmission layers and the port number after determining the number of transmission layers indicated by the code word transmission indication information. Similarly, the mapping relationship between the number of transmission layers and the scrambling identifier, the data resource mapping identifier, etc. can be preset, which is not described herein. Or,

[0250] The code word transmission indication information only indicates the port number used for transmitting the corresponding code word, in which case the terminal side can also preset the mapping relationship between the port number and the number of transmission layers, and then the terminal can also obtain the number of layers used for transmitting the corresponding code word after determining the port number. Or,

[0251] The code word 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, which can use the methods of joint indication and separate indication, wherein:

[0252] Joint indication refers to indicating the number of transmission layers used by the corresponding codeword for transmission and the port number used by the corresponding codeword for transmission by one identifier (for example, one bit) in the codeword transmission indication information, in which case the terminal side can obtain the number of transmission layers used by the corresponding codeword for transmission and the port number used by the corresponding codeword for transmission according to the one identifier and the mapping relationship between the number of transmission layers and the port number.

[0253] Separate indication refers to indicating the number of transmission layers used by the corresponding codeword for transmission and the port number used by the corresponding codeword for transmission by two identifiers (for example, two bits) in the codeword transmission indication information, in which case the terminal can determine the number of transmission layers used by the corresponding codeword for transmission according to the identifier corresponding to the number of transmission layers, determine the port number used by the corresponding codeword for transmission according to the identifier corresponding to the port number, and obtain other information according to the mapping relationship between the preset number of transmission layers and the other information, or indicate by a separate identifier, which is not limited herein. Alternatively,

[0254] The codeword transmission indication information indicates the transmission point indication information, and other information indicated together, for example, the number of transmission layers used by the corresponding codeword for transmission, the port number used by the corresponding codeword for transmission, and the scrambling identifier, can be jointly indicated (for example, occupying one bit) or separately indicated (for example, occupying bits), which is not limited herein. Alternatively,

[0255] The codeword transmission indication information indicates the transmission point indication information, and the terminal further obtains the number of transmission layers and the port number according to the mapping relationship between the site and the number of transmission layers and the port number. Alternatively, the terminal further obtains the number of transmission layers used by the corresponding codeword for transmission according to the mapping relationship between the site and the number of transmission layers, and further determines the port number used by the corresponding codeword for transmission according to a preset rule, in which the preset rule can be an incremental rule, for example, when the number of transmission layers is the first layer, the port number is 7, when the number of transmission layers is the second layer, the port number is 8, which is not limited herein, or other rules, for example, adding or subtracting a preset number.

[0256] When the codeword transmission indication information indicates the data resource element mapping information and the quasi-co-location indication information, the joint indication and the separate indication can 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, the joint identifier can be used for indication, for example, the PDSCH resource element mapping and quasi-co-location indication identifier (PDSCH-RE-Mapping and Quasi-Co-Location Indicator) in the existing protocol.

[0257] For example, assuming that the control information is DCI, one codeword transmission indication information is configured for each codeword in one DCI, the transmission indication information indicates one or more of the transmission related information, assuming that the information is transmitted in the format of "DCI format 2D", in which there are transport block 1 and transport block 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 used by the corresponding codeword, the scrambling identity, and the number of transmission layers used by the corresponding codeword" occupies 3 bits, "data resource element mapping information and quasi co-location indication information" occupies 2 bits; for transport block 2, "the port number used by the corresponding codeword, the scrambling identity, and the number of transmission layers used by the corresponding codeword" occupies 3 bits, "data resource element mapping information and quasi co-location indication information" occupies 2 bits, but not limited thereto. It should be noted that the codeword can be understood as the encoded transport block.

[0258] Specifically, the terminal side can be pre-configured with the mapping relationship between the codeword transmission indication information and the transmission related information, and / or the mapping relationship between the codeword resource block indication information and the time-frequency resource block.

[0259] Further, when the codeword indication information includes the codeword transmission indication information, the terminal determines the transmission related information of the at least two codewords according to the codeword transmission indication information and the preset mapping relationship between the codeword transmission indication information and the transmission related information, wherein the transmission related information is the information indicated by the above-mentioned codeword transmission indication information: the number of transmission layers used by the corresponding codeword, the port number used by the corresponding codeword, the scrambling identity, the data resource element mapping information, the quasi co-location indication information, and the transmission point indication information.

[0260] For example, assuming that the control information includes two codeword indication information, corresponding to two codewords, denoted as "codeword 0" and "codeword 1", respectively, in Table 8,

[0261] Table 8

[0262]

[0263]

[0264] In the example of Table 8, the codeword transmission indication information has 8 different values to indicate 8 different situations, which can specifically occupy 3 bit positions in the control information, for example, "000" represents the case of Value = 0, "001" represents the case of Value = 1, but not limited thereto, more bits can be used to indicate more situations, or fewer bits can be used when the situation is less. For example, "codeword indication information 1", the 0-3 of the codeword transmission indication information indicates the number of transmission layers, the port number, and the scrambling identity (n SCID); 4-6. The three cases indicate the number of transmission layers and the port number. Assuming that the terminal receives the code word transmission indication information "000". According to the corresponding relationship shown in Table 8, it can be obtained that 1 layer, port 7, n SCID = 0, that is, the number of transmission layers used by the transmission code word 1 is 1 layer, the port number used by the transmission code word 2 is 7, and the scrambling identifier n SCID = 0.

[0265] It should be noted that the at least two code word indication information corresponds to at least two code words, which can come from one station or multiple different stations, and the same code word can also come from multiple different stations, such as different stations transmitting different layers of the same code word.

[0266] Further, the resource block indication information is used to indicate the resource block of the code word. That is, it indicates the resource block of the code word corresponding to the code word transmission indication information.

[0267] Optionally, since the resources can be sent in different frequency bands, different code words can be indicated by different resource indication information to indicate the resource block of the corresponding code word, and multiple code words can share the number of layers, port, and the like.

[0268] In addition, the resource blocks corresponding to multiple code words can be the same, and optionally, the resource block indication information can indicate multiple code words together, that is, multiple code words share one resource block indication information.

[0269] Further, the network side device sends the control information to the terminal, which can be: the network side device determines the control channel format according to the format and / or transmission mode of the control information, and then the network side device sends the control information according to the control channel format.

[0270] Optionally, the network side device can determine the control channel format according to the mapping relationship between the "format and / or transmission mode of the control information" and the control channel format.

[0271] Among them, the format of different control information can carry different number of information bits, the specific information content carried can also be different, or the number of bits used for the same information field can also be different. Different transmission modes can correspond to different transmission modes, for example, it can correspond to single antenna transmission, transmit diversity transmission, multi-user MIMO transmission, closed-loop spatial multiplexing transmission, and the like.

[0272] It should be noted that the network side device determines the control channel format according to the format and / or transmission mode of the control information, mainly determines the aggregation level of the control channel according to the format and / or transmission mode of the control information, wherein the aggregation level of the control channel can refer to the resource (for example, resource element (RE)) used for transmitting information, and the higher the aggregation level is, the more REs are occupied. With the expansion of the control information, the information carried by the control information is also more and more, when the number of information bits carried by the control information exceeds a certain threshold value, it is more suitable for the control channel with high aggregation level, and the control channel with high aggregation level is used to transmit larger control information, which can reduce the blind detection times of the terminal.

[0273] Specifically, the format of the control information can adopt the form of the existing format plus the newly added format of the embodiment of the application, and the newly added format can be a format containing various cases of the foregoing control information, for example, a format including "codeword indication information and / or codeword resource block indication information", which is denoted as "DCI format 2E", which is not limited herein. Specifically, when decoding the newly added format, the terminal can obtain the corresponding indication information according to the corresponding bit in the codeword domain, and then obtain the content indicated by the indication information.

[0274] The transmission mode (TM) can be the current transmission mode indicated by the network side device through high layer signaling. The above-mentioned transmission mode can refer to the existing transmission mode, or the newly added transmission mode of the embodiment of the application, for example, denoted as "TM11". Among them, the newly added transmission mode can be a transmission mode different from the existing transmission mode, and the specific form is not limited, for example, the newly added transmission mode for multi-point multi-flow transmission, and the network side device can perform multi-point multi-flow transmission to the terminal in this newly added transmission mode.

[0275] The network side device sends the control information to the terminal, which can specifically use PDCCH as the control channel, but needs to determine the format of the PDCCH according to the format of the control information and / or the current transmission mode.

[0276] As shown in Table 9,

[0277] Table 9

[0278]

[0279] In Table 9, it is assumed that there are five formats of control information, denoted as DCI format 2A-DCI format 2E, when the format of control information is any one of DCI format 2A-DCI format 2D, any one of PDCCH formats 0-3 can be used, and when the format of control information is DCI format 2E, PDCCH format 0 or 1 cannot be used. As shown in Table 9, the resource of one PDCCH includes a control channel element (CCE), a number of resource element groups, and a number of PDCCH bits (i.e., the number of bits that one PDCCH can carry), and it can be seen that the resource of one PDCCH under PDCCH format 0 or 1 is less than the resource of one PDCCH under PDCCH formats 2 and 3, the number of information bits carried by DCI format 2E is greater, and the maximum number of information bits that one PDCCH under PDCCH format 0 or 1 can carry is less than the number of information bits carried by DCI format 2E or the code rate after carrying the information carried by DCI format 2E is greater than a certain threshold.

[0280] It is assumed that there are 11 transmission modes, denoted as TM1-TM11, when the transmission mode is TM1-TM10, any one of PDCCH formats 0-3 can be used, and when the transmission mode is TM11, PDCCH format 0 or 1 cannot be used. As shown in Table 9, the resource of one PDCCH includes a control channel element (CCE), a number of resource element groups, and a number of PDCCH bits (i.e., the number of bits that one PDCCH can carry), and it can be seen that the resource of one PDCCH under PDCCH format 0 or 1 is less than the resource of one PDCCH under PDCCH formats 2 and 3, the number of information bits of control information that needs to be sent to the terminal under TM11 is greater, and the maximum number of information bits that one PDCCH under PDCCH format 0 or 1 can carry is less than the number of information bits of control information required by the terminal or the code rate after carrying the control information required by the terminal is greater than a certain threshold.

[0281] In a specific implementation, the control channel format can be determined according to any one of the format of control information and the transmission mode, or the control channel format can be determined in combination with the format of control information and the transmission mode.

[0282] For example, the transmission mode is TM10, but the format of control information is DCI format 2E, only PDCCH formats 2 or 3 can be used, which is not limited herein.

[0283] Further, the terminal receives the control information sent by the network side device, and the receiving can further include: the terminal determines a control channel format according to a format and / or transmission mode of the control information, and then the terminal receives the control information sent by the network side device according to the control channel format. Compared with blind detection of the control information by the terminal, the terminal determines the control channel format in the same way as the network side device, so that the efficiency of receiving the control information by the terminal can be improved.

[0284] Specifically, the terminal determines the control channel format according to the format and / or transmission mode of the control information, which can be that the terminal determines 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.

[0285] Alternatively, the terminal receives control channel format information notified by the network side device, and then receives corresponding control information according to the received control channel format information.

[0286] Figure 5 A structural schematic diagram of an embodiment of the apparatus for multi-site data transmission provided by the application is shown in FIG. 1, which can be the network side device described above, and the apparatus can include: a processor 501, a transmitter 502, a receiver 503, a memory 504, and an antenna 505. Figure 5

[0287] The memory 504, the transmitter 502, the receiver 503, and the processor 501 can be connected through a bus. Of course, in actual application, the memory 504, the transmitter 502, the receiver 503, and the processor 501 can not be in a bus structure, but can be in other structures, for example, a star structure, which is not limited in the application.

[0288] Optionally, the processor 501 can be a general central processing unit or an application specific integrated circuit (ASIC), can be one or more integrated circuits for controlling program execution, can be a hardware circuit developed by using a field programmable gate array (FPGA), and can be a baseband processor.

[0289] Optionally, the processor 501 can include at least one processing core.

[0290] ​Optionally, the memory 504 can include one or more of a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk memory. The memory 504 is used to store data and / or instructions required by the processor 501 when running. The number of memories 504 can be one or more.

[0291] Optionally, the apparatus can further include a communication interface 506, also connected with 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.

[0292] The apparatus can be used to execute any of the foregoing method embodiments. Specifically:

[0293] The processor 501 is configured to generate control information including at least two site indication messages, the at least two site indication messages respectively indicating at least two sites transmitting data to a terminal, the at least two sites being non-quasi co-sited sites, and the at least two sites corresponding one-to-one to the at least two site indication messages.

[0294] The transmitter 502 is configured to transmit the control information to the terminal.

[0295] Further, the transmitter 502 is further configured to transmit configuration information to the terminal before transmitting the control information to the terminal, the configuration information being used to indicate a number of the at least two sites.

[0296] In an implementation, the control information further includes transmission parameter indication information, the transmission parameter indication information being used to indicate a set of transmission layers and port numbers used by the at least two sites.

[0297] In another implementation, the control information further includes at least two items of transmission parameter indication information, the at least two items of transmission parameter indication information corresponding one-to-one to the at least two sites, and the transmission parameter indication information being used to indicate a transmission layer used by the corresponding site.

[0298] Optionally, the control information further includes port number set indication information, the port number set indication information being used to indicate a set of port numbers allocated to the at least two sites.

[0299] The set of port numbers includes a set of port numbers allocated in a preset port number order, or a set of port numbers allocated in a frequency division manner, or a set of port numbers allocated in a code division manner, but is not limited thereto.

[0300] Optionally, the at least two sites transmit data to the terminal on the same time-frequency resource block.

[0301] Optionally, the port numbers used by the at least two sites are different.

[0302] Optionally, the control information further comprises an indication of a mapping manner between the at least two codewords and the at least two sites.

[0303] The mapping manner between the at least two codewords and the at least two sites comprises any one or any combination of the following: each codeword corresponds to one site, or each codeword corresponds to multiple sites, or multiple codewords correspond to one site.

[0304] Optionally, the control information comprises at least two codeword indication information, each codeword indication information corresponding to one codeword, the codeword indication information comprising codeword transmission indication information and / or codeword resource block indication information.

[0305] The codeword transmission indication information is used to indicate one or more of the following transmission related information: the number of transmission layers used by the transmission corresponding codeword, the port number used by the transmission corresponding codeword, scrambling identification, data resource element mapping information, quasi co-site indication information and transmission point indication information.

[0306] The codeword resource block indication information is used to indicate the time-frequency resource block of the transmission corresponding codeword.

[0307] In addition, the processor 501 can determine a control channel format according to the format and / or transmission mode of the control information, and the transmitter 502 transmits the control information to the terminal according to the control channel format.

[0308] Figure 6 A structure diagram of a second embodiment of a multi-site data transmission device provided by the application is shown in Figure 6 The device can be the terminal described above, and the device can comprise a processor 601, a transmitter 602, a receiver 603, a memory 604 and an antenna 605.

[0309] The memory 604, the transmitter 602, the receiver 603 and the processor 601 can be connected through a bus. Of course, in actual application, the memory 604, the transmitter 602, the receiver 603 and the processor 601 can not be in a bus structure, but can be in other structures, such as a star structure, which is not specifically limited by the application. The functions and other information of these devices can be referred to the embodiments, which will not be described here. Figure 5

[0310] ​The receiver 603 is configured to receive control information sent by the network-side device, the control information comprising at least two site indication messages.

[0311] The processor 601 is configured to determine at least two sites for transmitting data according to the at least two site indication messages, wherein the at least two sites are non-quasi co-located sites, and the at least two sites correspond to the at least two site indication messages one by one.

[0312] The processor 601 is further configured to obtain the bit number of the control information according to a preset number of the at least two sites before the receiver 603 receives the control information sent by the network-side device.

[0313] The receiver 603 is further configured to receive configuration information sent by the network-side device before receiving the control information sent by the network-side device, the configuration information being used to indicate the number of the at least two sites; and the processor 601 is configured to obtain the bit number of the control information according to the number of the at least two sites.

[0314] Optionally, the receiver 603 receives the control information sent by the network-side device, specifically, receives the control information sent by the network-side device according to the bit number of the control information.

[0315] In an embodiment, the control information further comprises transmission parameter indication information, the transmission parameter indication information being used to indicate a set of transmission layer numbers and port numbers used by the at least two sites; and the processor 601 is configured to determine the transmission layer numbers and the port numbers used by the at least two sites according to the transmission parameter indication information and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers and the port numbers of the at least two sites.

[0316] The processor 601 is further configured to determine the transmission layer numbers used by the at least two sites according to the at least two transmission parameter indication messages and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers.

[0317] In another embodiment, the control information further comprises at least two transmission parameter indication messages, the at least two transmission parameter indication messages corresponding to the at least two sites one by one; and the processor 601 is configured to determine the transmission layer numbers used by the at least two sites according to the at least two transmission parameter indication messages and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers.

[0318] The processor 601 is further configured to determine the transmission layer numbers used by the at least two sites according to the at least two transmission parameter indication messages and a preset mapping relationship between the transmission parameter indication information and the transmission layer numbers.

[0319] Optionally, the control information further comprises port number set indication information; and the processor 601 is configured to determine the port numbers used by the at least two sites according to the port number set indication information.

[0320] The processor 601 is further configured to acquire a set of port numbers available to each of the at least two sites according to the port indication information and a preset mapping relationship between the port indication information and the set of port numbers, and determine the port numbers used by the at least two sites according to the set of port numbers available to each of the at least two sites and the number of transmission layers used by the at least two sites.

[0321] The set of port numbers includes a set of port numbers allocated according to a preset port number sequence, or a set of port numbers allocated according to a frequency division manner, or a set of port numbers allocated according to a code division manner.

[0322] Further, the receiver 603 is further configured to receive data transmitted by the at least two sites to the terminal on the same time-frequency resource block.

[0323] Optionally, the processor 601 is further configured to acquire a data transmission manner between the at least two sites. Correspondingly, the receiver 603 receives control information sent by a network side device, specifically, receives the control information according to the data transmission manner.

[0324] Further, when the total number of transmission layers of the at least two sites is 2 or 4 and the data transmission manner is a transmission manner related to transmit diversity, the processor 601 is further configured to acquire a mapping relationship between a preset single code word and the number of transmission layers used by the at least two sites according to a preset mapping relationship between the single code word and the number of transmission layers.

[0325] Further, the control information further includes a mapping manner between at least two code words and the at least two sites. Correspondingly,

[0326] The processor 601 is further configured to acquire a mapping relationship between the at least two code words and the at least two sites according to the mapping manner between the at least two code words and the at least two sites.

[0327] The processor 601 is further configured to acquire the number of transmission layers corresponding to each of the at least two code words according to the mapping relationship between the at least two code words and the at least two sites and the number of transmission layers used by the at least two sites.

[0328] Optionally, the control information includes at least two code word indication information, each code word indication information corresponding to one code word, and the code word indication information includes code word transmission indication information and / or code word resource block indication information.

[0329] The code word transmission indication information is used for indicating one or more of the following transmission related information: a number of transmission layers used for transmitting the code word, a port number used for transmitting the code word, a scrambling identifier, data resource element mapping information, quasi co-location indication information, and transmission point indication information.

[0330] The code word resource block indication information is used for indicating time-frequency resource blocks used for transmitting the code word.

[0331] In one mode, the code word indication information includes the code word transmission indication information; and the processor 601 is further configured to determine the transmission related information of the at least two code words according to the code word transmission indication information in each code word and a preset mapping relationship between the code word transmission indication information and the transmission related information.

[0332] In another mode, the code word indication information includes code word resource block indication information; and the processor 601 is further configured to determine time-frequency resource blocks used for transmitting the code word according to the code word resource block indication information and a preset mapping relationship between the code word resource block indication information and the time-frequency resource blocks.

[0333] Optionally, the processor 601 is further configured to determine a control channel format according to the format and / or transmission mode of the control information; and the receiver 603 is specifically configured to receive the control information sent by the network side device according to the control channel format.

[0334] In the several embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0335] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0336] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of hardware plus software function unit.

[0337] The integrated unit realized in the form of software function unit can be stored in a computer readable storage medium. The software function unit stored in a storage medium includes a plurality of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0338] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of each embodiment of the present application.

Claims

1. A method for data transmission at multiple transmission points, characterized in that, include: The network-side device generates control information, which includes at least two transmission point indication information and transmission parameter indication information. The at least two transmission point indication information are used to indicate at least two transmission points for transmitting data to the terminal. These at least two transmission points are non-quasi-co-located transmission points, and each of the at least two transmission points corresponds one-to-one with the at least two transmission point indication information. The transmission parameter indication information indicates a set of transmission layers and port numbers used by the at least two transmission points. The port numbers are grouped using code division or frequency division, with each group of port numbers corresponding to one transmission point. The network-side device sends the control information to the terminal.

2. The method according to claim 1, characterized in that, The port numbers are grouped using code division, including: Each port number within each group of port numbers is distinguished by an orthogonal mask (OCC).

3. The method according to claim 1, characterized in that, The port numbers are grouped using frequency division, including: The port numbers are divided into multiple groups based on different frequency domain resources.

4. The method according to claim 1, characterized in that, The at least two transmission points transmit data to the terminal on the same time-frequency resource block.

5. The method according to claim 1, characterized in that, The control information also includes: codeword and transmission point mapping method indication information, used to indicate the mapping method between at least two codewords and the at least two transmission points.

6. The method according to claim 5, characterized in that, The mapping method between the at least two codewords and the at least two transmission points includes any one of the following or any combination thereof: each codeword corresponds to one transmission point, or each codeword corresponds to multiple transmission points, or multiple codewords correspond to one transmission point.

7. The method according to claim 1, characterized in that, The control information includes: at least two codeword indication information, each codeword indication information corresponding to one codeword, and the codeword indication information includes: codeword transmission indication information, and / or, codeword resource block indication information; The codeword transmission indication information is used to indicate one or more of the following transmission-related information: the number of transmission layers used to transmit the corresponding codeword, the port number used to transmit the corresponding codeword, the scrambling identifier, the data resource element mapping information, the quasi-co-address indication information, and the transmission point indication information. The codeword resource block indication information is used to indicate the time-frequency resource block for transmitting the corresponding codeword.

8. The method according to any one of claims 1-7, characterized in that, The network-side device sends the control information to the terminal, including: The network-side device determines the control channel format based on the format and / or transmission mode of the control information; The network-side device sends the control information to the terminal according to the control channel format.

9. A method for data transmission at multiple transmission points, characterized in that, include: The terminal receives control information sent by the network-side device, the control information including at least two transmission point indication information and transmission parameter indication information; The terminal determines at least two transmission points for transmitting data and a set of transmission layers and port numbers used by the at least two transmission points according to the control information; wherein, the at least two transmission point indication information is used to indicate at least two transmission points for transmitting data to the terminal, the at least two transmission points are non-quasi-co-located transmission points, the at least two transmission points correspond one-to-one with the at least two transmission point indication information, the transmission parameter indication information is used to indicate a set of transmission layers and port numbers used by the at least two transmission points, the port numbers are grouped by code division or frequency division, and each group of port numbers corresponds to one transmission point.

10. The method according to claim 9, characterized in that, The port numbers are grouped using code division, including: Each port number within each group of port numbers is distinguished by an orthogonal mask (OCC).

11. The method according to claim 9, characterized in that, The port numbers are grouped using frequency division, including: The port numbers are divided into multiple groups based on different frequency domain resources.

12. The method according to claim 9, characterized in that, The terminal receives data sent by the at least two transmission points on the same time-frequency resource block.

13. The method according to claim 9, characterized in that, The control information also includes: codeword and transmission point mapping method indication information, used to indicate the mapping method between at least two codewords and the at least two transmission points.

14. The method according to claim 13, characterized in that, The mapping method between the at least two codewords and the at least two transmission points includes any one of the following or any combination thereof: each codeword corresponds to one transmission point, or each codeword corresponds to multiple transmission points, or multiple codewords correspond to one transmission point.

15. The method according to claim 9, characterized in that, The control information includes: at least two codeword indication information, each codeword indication information corresponding to one codeword, and the codeword indication information includes: codeword transmission indication information, and / or, codeword resource block indication information; The codeword transmission indication information is used to indicate one or more of the following transmission-related information: the number of transmission layers used to transmit the corresponding codeword, the port number used to transmit the corresponding codeword, the scrambling identifier, the data resource element mapping information, the quasi-co-address indication information, and the transmission point indication information. The codeword resource block indication information is used to indicate the time-frequency resource block for transmitting the corresponding codeword.

16. The method according to claim 15, characterized in that, The codeword indication information includes the codeword transmission indication information, and the method further includes: The terminal determines the transmission-related information of the at least two codewords based on the codeword transmission indication information in each codeword and the preset mapping relationship between the codeword transmission indication information and the transmission-related information.

17. The method according to claim 15, characterized in that, The codeword indication information includes codeword resource block indication information, and the method further includes: The terminal determines the time-frequency resource block corresponding to the codeword to be transmitted based on the codeword resource block indication information and the preset mapping relationship between the codeword resource block indication information and the time-frequency resource block.

18. The method according to any one of claims 9-17, characterized in that, The terminal receives control information sent by the network-side device, including: The terminal determines the control channel format based on the format and / or transmission mode of the control information; The terminal receives control information sent by the network-side device according to the control channel format.

19. A device for multi-point data transmission, characterized in that, include: A processor is configured to generate control information, the control information including at least two transmission point indication information and transmission parameter indication information; wherein, the at least two transmission point indication information are respectively used to indicate at least two transmission points for transmitting data to the terminal, the at least two transmission points are non-quasi-co-located transmission points, and the at least two transmission points correspond one-to-one with the at least two transmission point indication information; the transmission parameter indication information is used to indicate a set of transmission layers and port numbers used by the at least two transmission points, the port numbers are grouped by code division or frequency division, and each group of port numbers corresponds to one transmission point; A transmitter is used to send the control information to the terminal.

20. The apparatus according to claim 19, characterized in that, The port numbers are grouped using code division, including: Each port number within each group of port numbers is distinguished by an orthogonal mask (OCC).

21. The apparatus according to claim 19, characterized in that, The port numbers are grouped using frequency division, including: The port numbers are divided into multiple groups based on different frequency domain resources.

22. The apparatus according to claim 19, characterized in that, The at least two transmission points transmit data to the terminal on the same time-frequency resource block.

23. The apparatus according to claim 19, characterized in that, The control information also includes: codeword and transmission point mapping method indication information, used to indicate the mapping method between at least two codewords and the at least two transmission points.

24. The apparatus according to claim 23, characterized in that, The mapping method between the at least two codewords and the at least two transmission points includes any one of the following or any combination thereof: each codeword corresponds to one transmission point, or each codeword corresponds to multiple transmission points, or multiple codewords correspond to one transmission point.

25. The apparatus according to claim 19, characterized in that, The control information includes: at least two codeword indication information, each codeword indication information corresponding to one codeword, and the codeword indication information includes: codeword transmission indication information, and / or, codeword resource block indication information; The codeword transmission indication information is used to indicate one or more of the following transmission-related information: the number of transmission layers used to transmit the corresponding codeword, the port number used to transmit the corresponding codeword, the scrambling identifier, the data resource element mapping information, the quasi-co-address indication information, and the transmission point indication information. The codeword resource block indication information is used to indicate the time-frequency resource block for transmitting the corresponding codeword.

26. The apparatus according to any one of claims 19-25, characterized in that, The processor is further configured to determine the control channel format based on the format and / or transmission mode of the control information; The transmitter is specifically used to send the control information to the terminal according to the control channel format.

27. A device for multi-point data transmission, characterized in that, include: A receiver is used to receive control information sent by network-side devices, the control information including at least two transmission point indication information and transmission parameter indication information; The processor is configured to determine, based on the control information, at least two transmission points for transmitting data and a set of transmission layers and port numbers used by the at least two transmission points; wherein, the at least two transmission point indication information is used to indicate at least two transmission points for transmitting data to the terminal, the at least two transmission points are non-quasi-co-located transmission points, the at least two transmission points correspond one-to-one with the at least two transmission point indication information, the transmission parameter indication information is used to indicate a set of transmission layers and port numbers used by the at least two transmission points, the port numbers are grouped by code division or frequency division, and each group of port numbers corresponds to one transmission point.

28. The apparatus according to claim 27, characterized in that, The port numbers are grouped using code division, including: Each port number within each group of port numbers is distinguished by an orthogonal mask (OCC).

29. The apparatus according to claim 27, characterized in that, The port numbers are grouped using frequency division, including: The port numbers are divided into multiple groups based on different frequency domain resources.

30. The apparatus according to claim 27, characterized in that, The receiver is also used to receive data sent by the at least two transmission points on the same time-frequency resource block.

31. The apparatus according to claim 27, characterized in that, The control information also includes: codeword and transmission point mapping method indication information, used to indicate the mapping method between at least two codewords and the at least two transmission points.

32. The apparatus according to claim 31, characterized in that, The mapping method between the at least two codewords and the at least two transmission points includes any one of the following or any combination thereof: each codeword corresponds to one transmission point, or each codeword corresponds to multiple transmission points, or multiple codewords correspond to one transmission point.

33. The apparatus according to claim 27, characterized in that, The control information includes: at least two codeword indication information, each codeword indication information corresponding to one codeword, and the codeword indication information includes: codeword transmission indication information, and / or, codeword resource block indication information; The codeword transmission indication information is used to indicate one or more of the following transmission-related information: the number of transmission layers used to transmit the corresponding codeword, the port number used to transmit the corresponding codeword, the scrambling identifier, the data resource element mapping information, the quasi-co-address indication information, and the transmission point indication information. The codeword resource block indication information is used to indicate the time-frequency resource block for transmitting the corresponding codeword.

34. The apparatus according to claim 33, characterized in that, 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 two codewords based on the codeword transmission indication information in each codeword and a preset mapping relationship between the codeword transmission indication information and the transmission-related information.

35. The apparatus according to claim 33, characterized in that, The codeword indication information includes codeword resource block indication information; The processor is further configured to determine the time-frequency resource block corresponding to the codeword for transmission based on the codeword resource block indication information and the preset mapping relationship between the codeword resource block indication information and the time-frequency resource block.

36. The apparatus according to any one of claims 27-35, characterized in that, The processor is further configured to determine the control channel format based on the format and / or transmission mode of the control information; The receiver is specifically used to receive control information sent by the network-side device according to the control channel format.

37. A computer-readable storage medium, characterized in that, Includes computer execution instructions, which, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-8, or any one of claims 9-18.

38. A communication device, characterized in that, include: processor; The processor is connected to a memory for storing computer execution instructions. The processor executes the computer execution instructions stored in the memory to enable the communication device to implement the method as described in any one of claims 1-8, or any one of claims 9-18.

39. A chip system, characterized in that, include: Memory, used to store computer programs; A processor for calling and running the computer program from the memory, causing a device having the chip system installed to perform the method as described in any one of claims 1-8, or any one of claims 9-18.

40. A computer program product comprising a computer program that, when run on a computer, causes the computer to perform the method as described in any one of claims 1-8, or any one of claims 9-18.

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