Diversity transmission method, terminal, and network side device

Abstract

The present application relates to the technical field of communications, and discloses a diversity transmission method, a terminal, and a network side device. The diversity transmission method in embodiments of the present application comprises: a terminal acquires a configuration parameter of a transmit diversity; and the terminal receives, on the basis of first indication information or a predefined rule and according to the configuration parameter of the transmit diversity, a signal sent by a network side device.

Description

Diversity transmission method, terminal and network side equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number 202311839072.0 and invention name “Diversity Transmission Method, Terminal and Network Side Equipment”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a diversity transmission method, a terminal, and a network-side device. Background Art

[0004] In a cell-free network architecture or a multi-transmit / receive point (TRP) cell scenario, each TRP or TRP cluster will cover the corresponding area according to the network plan. Multiple TRPs will be deployed to provide coverage in hotspot coverage areas and coordinated transmission areas. Therefore, in a cell-free network architecture, there will be areas where the synchronization signal beams of multiple TRPs or TRP clusters overlap.

[0005] In a cell-free network architecture, multiple TRP nodes can be planned as a cell, and each TRP can transmit one or more synchronization signal beams. This significantly increases the number of synchronization signal beams in a cell-free network architecture, easily exceeding the maximum number of synchronization signal beams supported by existing 5G systems. In 5G systems, system information is broadcast using synchronization signal beams. If the 5G system broadcast scheme is still used in a cell-free network architecture, system information will be broadcast separately for each synchronization signal beam, resulting in increased time and frequency resource overhead. Summary of the Invention

[0006] The embodiments of the present application provide a diversity transmission method, a terminal, and a network-side device, which can improve the transmission efficiency of information sent by the network-side device and avoid excessive resource occupation.

[0007] In a first aspect, a diversity transmission method is provided, comprising:

[0008] The terminal obtains the configuration parameters of the transmission diversity;

[0009] The terminal receives a signal sent by a network-side device based on the first indication information or a predefined rule and in accordance with the configuration parameters of the transmission diversity.

[0010] In a second aspect, a diversity transmission method is provided, including:

[0011] The network side device sends the configuration parameters of transmission diversity to the terminal; the configuration parameters of transmission diversity are used by the terminal to receive the signal sent by the network side device based on the first indication information or predefined rules.

[0012] According to a third aspect, a diversity transmission device is provided, comprising:

[0013] An acquisition module, used to obtain configuration parameters of transmission diversity;

[0014] The sending module is used to receive a signal sent by a network side device based on the first indication information or a predefined rule and in accordance with the configuration parameters of the transmission diversity.

[0015] In a fourth aspect, a diversity transmission device is provided, including:

[0016] The sending module is used to send the configuration parameters of transmission diversity to the terminal; the configuration parameters of transmission diversity are used by the terminal to receive the signal sent by the network side device based on the first indication information or predefined rules.

[0017] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0018] In the sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to obtain configuration parameters of transmission diversity; the communication interface is used to receive a signal sent by a network side device according to the configuration parameters of the transmission diversity based on first indication information or predefined rules.

[0019] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0020] In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send configuration parameters of transmission diversity to the terminal; the configuration parameters of transmission diversity are used by the terminal to receive the signal sent by the network side device based on the first indication information or predefined rules.

[0021] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0022] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0023] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0024] In a twelfth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the diversity transmission method as described in the first aspect or the second aspect.

[0025] In an embodiment of the present application, the terminal obtains the configuration parameters of transmission diversity; the terminal receives the signal sent by the network side device according to the configuration parameters of the transmission diversity based on the first indication information or predefined rules, and the network side device can send a signal to the terminal based on the transmission diversity, thereby improving the transmission efficiency of the information sent by the network side device and avoiding the problem of excessive resource occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of the present application;

[0027] FIG2 is a flow chart of a diversity transmission method according to an embodiment of the present application;

[0028] FIG3 is a schematic diagram of multiplexing of synchronization signals transmitted simultaneously by multiple TRPs in a diversity transmission method according to an embodiment of the present application;

[0029] FIG4 is a schematic diagram of TRP beam diversity transmission in the case of a TRP cluster in the diversity transmission method provided in an embodiment of the present application;

[0030] FIG5 is a schematic diagram of MIB-based transmission diversity indication of a diversity transmission method provided in an embodiment of the present application;

[0031] FIG6 is a schematic diagram of a diversity transmission method within a TRP cluster according to an embodiment of the present application;

[0032] FIG7 is a schematic diagram of transmission diversity between a macro base station and a small base station according to a diversity transmission method provided in an embodiment of the present application;

[0033] FIG8 is a schematic diagram of transmission diversity of multiple synchronization signals of multiple small stations in the diversity transmission method provided in an embodiment of the present application;

[0034] FIG9 is a schematic diagram of the transmission diversity principle of multi-terminal multi-synchronous signals provided in an embodiment of the present application;

[0035] FIG10 is a second schematic diagram of intra-TRP cluster transmission diversity of the diversity transmission method provided in an embodiment of the present application;

[0036] FIG11 is a second flow chart of a diversity transmission method according to an embodiment of the present application;

[0037] FIG12 is a schematic diagram of a structure of a diversity transmission device according to an embodiment of the present application;

[0038] FIG13 is a second structural diagram of a diversity transmission device according to an embodiment of the present application;

[0039] FIG14 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0040] FIG15 is a schematic structural diagram of a terminal according to an embodiment of the present application;

[0041] FIG16 is a schematic structural diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0043] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0044] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0045] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0046] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0047] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0048] First, the technical terms and application scenarios involved in the embodiments of this application are introduced:

[0049] Cell-free massive multiple-input / multiple-output (MIMO) systems can be considered a deconstruction of traditional massive MIMO systems. In traditional massive MIMO systems, antennas are concentrated at a single site (base station), and terminals are distributed around the base station in the form of cells. In massive MIMO systems, each base station deploys a large number of antennas. This provides higher array gain and spatial resolution. Multiple terminals can be served simultaneously using the same time and frequency resources, delivering high throughput, high reliability, and high energy efficiency. Cell-free massive MIMO systems eliminate the concept of cells. Instead, a large number of antennas are distributed over a wide area, and terminals are similarly dispersed over this wide area. These antennas are called transmit-receive points (TRPs) or access points (APs). In theory, each terminal can communicate with every AP. Leveraging the fronthaul network and central processing unit (CPU), a large number of geographically dispersed TRPs can collectively serve a smaller number of terminals. The CPU utilizes channel statistics for joint detection. Cell-Free Massive MIMO networks are expected to be applied to next-generation indoor and hotspot coverage scenarios, such as smart factories, train stations, shopping malls, stadiums, subways, hospitals, community centers, or university campuses.

[0050] In actual deployment, the Cell-free network in a hotspot area can be viewed as a super cell containing multiple TRPs, where multiple TRPs use the same cell ID. Based on the synchronization accuracy and connection relationship between these TRPs, multiple TRPs with high synchronization accuracy can achieve collaborative transmission.

[0051] The broadcast-related channels of the cell-free network (synchronization channel, random access channel, broadcast physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH)) can be implemented according to single frequency network (SFN) or distributed networking. As the number of TRPs included in the cell-free network increases and the coverage area expands, the number of synchronization signal block (SS / PBCH Block, SSB) beams required will continue to increase, and the corresponding broadcast PDCCH and PDSCH resources will also continue to increase.

[0052] The LTE system introduces the Space Frequency Block Code (SFBC) diversity transmission technology, which can be used for PDSCH data transmission. However, the LTE SFBC diversity transmission scheme limits the base station's cell reference signal (CRS) to 2 or 4 ports, and is bound to other broadcast signals (such as CRS). In the 5G NR system, a beam-based synchronization signal transmission mechanism is introduced. According to network planning, different SSB beams correspond to different coverage areas. In a centrally deployed network, in theory, the terminal will only receive one SSB beam signal with better signal quality, that is, the SSB beam in the area where the terminal is located. Therefore, the broadcast-related signal transmission of the 5G NR network uses beamforming gain instead of LTE transmission diversity gain.

[0053] A cell-free network may contain a large number of TRP nodes, each of which may participate in the transmission of synchronization signals to ensure that terminals within the coverage area can access the cell. Beam-based transmission of synchronization signals and system information can ensure that terminals can discover cells, but beam-based system information transmission increases the time and frequency resources occupied by system information, especially as the number of synchronization signal beams in a cell-free network increases.

[0054] In addition, in the Cell-free network, in order to achieve collaborative transmission between TRP nodes, the coverage areas of each TRP node need to overlap to a certain extent. This also means that terminals in the overlapping coverage area can receive synchronization signals sent by multiple TRP nodes. Connected terminals can use multiple TRPs to achieve coherent or multi-stream transmission based on channel measurement feedback. However, in the non-connected state, due to the lack of prior channel measurement information, the NR system only introduces a single-beam / single-port transmission mode, that is, the terminal is only associated with one synchronization signal beam corresponding to the TRP or TRP cluster, and other synchronization channel beams are regarded as interference signals, which increases the implementation complexity of the terminal and affects the communication quality and mobility of the terminal.

[0055] Therefore, in order to solve the problem of excessive resource occupation by system information in the Cell-free network and improve the efficiency of system information transmission, the method of the embodiment of the present invention proposes scheduling multiple TRP nodes to send system information in a transmission diversity manner; replacing the method of multiple TRP nodes sending system information separately.

[0056] The diversity transmission method provided in the embodiments of the present application is described in detail below through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0057] Referring to FIG. 2 , an embodiment of the present application provides a diversity transmission method. The embodiment is performed by a terminal. The method includes:

[0058] Step 101: The terminal obtains configuration parameters of transmit diversity;

[0059] Specifically, the configuration parameters of the transmission diversity may be obtained by determining through predefined rules or through information indicated by a network-side device.

[0060] Step 102: The terminal receives a signal sent by the network-side device based on the first indication information or predefined rules and in accordance with the configuration parameters of transmit diversity.

[0061] Specifically, after determining the configuration parameters of transmission diversity, transmission diversity is performed statically, such as after determining the configuration parameters based on predefined rules or after a predefined process is completed, that is, the terminal receives the downlink signal sent by the network side device according to the transmission mode of diversity transmission, or transmission diversity is performed semi-statically, for example, based on the indication of the first indication information, after the first indication information takes effect, the terminal receives the downlink signal according to the transmission mode of transmission diversity, the first indication information is indicated by high-layer signaling such as MAC CE signaling, or transmission diversity is performed dynamically, for example, the first indication information can be dynamically indicated through DCI signaling, such as DCI signaling indicates that the currently scheduled PDSCH uses transmission diversity, and the terminal receives the downlink signal sent by the network side device according to the transmission mode of diversity transmission.

[0062] The method of this embodiment can reduce the time-frequency resource overhead of sending system information in turn according to the synchronization signal beam in a distributed / cell-free networking situation, and can improve the system information reception quality in the synchronization signal beam overlapping area.

[0063] Optionally, the above solution can be applied to the transmission of system information, or other non-connection downlink broadcast or multicast information (such as paging messages), etc., which is not limited in the embodiments of the present application.

[0064] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0065] Beam combining for transmit diversity;

[0066] Transmission mode;

[0067] The number of ports corresponding to the beam combination;

[0068] The port identifier corresponding to the beam combination;

[0069] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0070] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0071] The beam combination of transmit diversity is, for example, a plurality of candidate beam combinations, and each beam combination includes specific beams.

[0072] Optionally, the port identifier may be represented by a port number, for example.

[0073] Optionally, the reference signal sequence may be, for example, a demodulation reference signal (DMRS) sequence.

[0074] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission.

[0075] Among them, multi-beam diversity transmission may have different transmission modes according to different precoding matrices, such as SFBC, Space-Time Block Code (STBC), repeated transmission, etc. It can be understood that different transmission diversity methods correspond to different precoding matrices.

[0076] Optionally, the beam in the beam combination is a synchronization signal beam or a reference signal beam.

[0077] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0078] predefined rules, second indication information;

[0079] The second indication information is indicated by at least one of the following: a master information block (MIB) message, a system information block (SIB) message, a radio resource control (RRC), a medium access control unit (MAC CE) message, and a downlink control information (DCI) message.

[0080] Specifically, the predefined rules include, for example, the layout of the synchronization signal, for example, synchronization signal beam pattern 1 (SS beam pattern 1) corresponds to single beam transmission / single port transmission; synchronization signal beam pattern 2 (SS beam pattern 2) corresponds to diversity transmission.

[0081] Alternatively, the configuration parameters of transmit diversity are indicated by an MIB message, for example, the MIB message indicates whether the synchronization signal beam associated with the MIB uses transmit diversity. Optionally, the MIB message may indicate that the downlink signal is transmitted using transmit diversity mode before entering the connected state to configure other transmission modes.

[0082] Alternatively, the configuration parameters of transmission diversity are indicated through an SIB message, for example, the SIB message indicates the beam combining information of the synchronization signal beam participating in transmission diversity, or the PDCCH and / or scheduled PDSCH associated with the beam combining of the synchronization signal beam use transmission diversity.

[0083] Alternatively, the configuration parameters of transmission diversity are indicated through high-layer signaling (such as RRC messages and / or MAC CE messages), for example, beam combination information indicating the synchronization signal or CSI-RS beam, and PDCCH or PDSCH is received according to the transmission diversity of the beam combination.

[0084] Alternatively, when dynamically scheduling the PDSCH for transmit diversity, the DCI message carries relevant configuration parameters.

[0085] It is understood that the aforementioned methods for obtaining configuration parameters can be combined to determine a complete set of transmit diversity configuration parameters. For example, a SIB message configures several candidate beam combinations for transmit diversity. When dynamically scheduling PDSCH transmit diversity, the DCI information indicates one of the candidate beam combinations to use for PDSCH transmit diversity.

[0086] In the above implementation, the configuration parameters of the transmission diversity can be obtained in a variety of ways, which has great flexibility and low implementation complexity.

[0087] Optionally, the beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination that is quasi-co-located with the synchronization signal beam in the synchronization signal beam set.

[0088] Optionally, the number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmit diversity;

[0089] The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmission diversity, or an inclusion relationship.

[0090] The beam order may be arranged in sequence according to the beam number, for example, beam 1 corresponds to port number 1001, and beam 2 corresponds to 1002. For example, the corresponding transmit diversity port number is determined according to the number of the reference signal corresponding to the transmit diversity beam.

[0091] The inclusion relationship, for example, refers to the inclusion relationship between the upper-level synchronization signal beam and the lower-level synchronization signal beam in the Cell free network. For example, the first-level synchronization signal beam 1, the second-level synchronization signal beams 1-1 and 1-2 perform transmission diversity, the first-level synchronization signal beam 1 is the beam of the macro station node, and the second-level synchronization signal beams 1-1 and 1-2 are the beams of the small station nodes under the coverage of the macro station node.

[0092] Optionally, the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on a port order corresponding to the beam combination or a beam order or inclusion relationship in the beam combination.

[0093] Specifically, different numbers of beams of transmit diversity correspond to different precoding matrices. For example, a beam combination with a beam number of 2 corresponds to one coding matrix, and a beam combination with a beam number of 4 corresponds to one coding matrix.

[0094] Each beam in the beam combination corresponds to a different row and column of the precoding matrix, for example, based on the port order, beam order, and inclusion relationship.

[0095] Optionally, the first indication information includes at least one of the following:

[0096] Transmit diversity trigger information;

[0097] Transmission mode switching indication information.

[0098] Specifically, the first indication information may be used to indicate triggering of transmit diversity, or enabling / disabling transmit diversity, or may be used to indicate switching of a transmission mode.

[0099] Optionally, according to predefined rules, transmission mode 1 (for example, single-beam transmission / single-port transmission) is the default transmission mode for broadcast information, and the network side device explicitly indicates the switching of the transmission mode of a certain downlink physical channel (for example, switching to transmission mode 2 (diversity transmission)) through DCI or MAC CE or RRC message.

[0100] Optionally, the first indication information is indicated by at least one of the following:

[0101] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, Medium Access Control (MAC) CE messages, and Downlink Control Information (DCI) messages. It is understood that the first indication information and the second indication information may be carried in the same message or in different messages, without strict limitation.

[0102] Optionally, when the configuration parameters of the transmit diversity are determined by a predefined rule, the terminal acquiring the configuration parameters of the transmit diversity includes:

[0103] The terminal determines the configuration parameters of the transmission diversity based on the layout of the synchronization signal.

[0104] Optionally, when the configuration parameter of the transmit diversity includes the transmission mode, the terminal determines the configuration parameter of the transmit diversity based on the layout mode of the synchronization signal, including:

[0105] The terminal determines, based on the layout of the synchronization signal, candidate resources of the synchronization signal;

[0106] The terminal searches for the synchronization signal based on the candidate resources to obtain a search result;

[0107] The terminal determines the transmission mode based on the search result;

[0108] The candidate resources include at least one of the following: a time-frequency position or a reference signal sequence; different candidate resources represent different transmission modes.

[0109] Specifically, candidate resources supporting transmit diversity are determined by the layout of synchronization signals. For example, the protocol defines two types of synchronization rasters (sync rasters) corresponding to different candidate synchronization signal frequencies: one type of sync raster is used for candidate synchronization signal frequencies for PDSCH single-beam transmission, and the other type of sync raster is used for candidate synchronization signal frequencies for PDSCH transmit diversity. The terminal searches for synchronization signals at the candidate frequencies of the two types of sync rasters and determines the transmission mode of the synchronization signal beam based on the synchronization signal search results.

[0110] For example, whether to use transmit diversity is determined by time-frequency position or reference signal sequence (such as a preamble sequence set).

[0111] Alternatively, diversity transmission can be performed based on different resources. For example, two TRPs in a Cell-free network send synchronization signals in the same time period, but use different frequency resources or reference signal random sequences. As shown in Figure 3, for example, SSB#0-0 and SSB#1-0 using different frequency resources can be combined as beams for diversity transmission.

[0112] Optionally, the predefined rule may be that the synchronization signals detected in the same time period are used as beam pairing for transmission diversity. For example, two or more synchronization signals of consecutive orthogonal frequency division multiplexing OFDM symbols in a time slot are paired for transmission diversity. Furthermore, the transmission diversity port number corresponding to each synchronization signal beam is determined according to the frequency domain order, time domain order, or code domain order in which the synchronization signals appear. As shown in Figure 3, TRP0 and TRP1 use different frequency resources or code domain resources to send synchronization signals in the same time period, then the synchronization signal beams corresponding to TRP0 and TRP1 on the same time resource form a beam combination for subsequent PDCCH / PDSCH transmission diversity. As shown in Figure 4, in the case of a TRP cluster, the TRP beam performs transmission diversity, where PSS is the primary synchronization signal and SSS is the secondary synchronization signal.

[0113] Optionally, the transmission diversity of PDCCH and / or PDSCH is indicated by an MIB message. Whether the current synchronization signal supports transmission diversity is notified in the MIB message. For example, 1 bit of information of the MIB message indicates whether the synchronization signal beam associated with the MIB uses transmission diversity for transmitting PDCCH and / or PDSCH. The determination rule of the synchronization signal beam combination is further predefined. For example, if 4 synchronization signal beams are included in a time slot, the terminal reads the MIB message in the corresponding synchronization signal to determine whether the 4 synchronization signals in the time period (for example, a time slot) are to be combined for transmission diversity. For example, as shown in Figure 5, the 4 SSBs in a time period are SSB#0, SSB#1, SSB#2, and SSB#3. By reading the MIB messages corresponding to the four SSBs, the SSBs with transmission diversity are enabled to form a beam combination for transmission diversity. For example, if the MIB message corresponding to SSB#0 and SSB#1 is configured with transmission diversity enabled (i.e., transmission diversity is triggered), the terminal that selects SSB#0 or SSB#1 to access the cell will use the transmission diversity of SSB#0 and SSB#1 to receive the downlink signal PDCCH and / or PDSCH in the subsequent process. For another example, in a Cell-free network where the TRP cluster sends a synchronization signal, the network supports transmission diversity within the TRP cluster. The terminal receives the synchronization signal sent by the TRP cluster and reads the corresponding MIB message. The MIB indicates that the synchronization signal enables transmission diversity. As shown in Figure 6, the MIB indicates the frequency or time offset, and the terminal receives the synchronization signal of each TRP in the TRP cluster, and / or receives the configuration parameters of transmission diversity.

[0114] Optionally, the SIB message indicates PDSCH and / or PDCCH transmit diversity. For example, the SIB message carries the pairing relationship between synchronization signals. When subsequently receiving downlink signals, the terminal determines the synchronization signal beam participating in transmit diversity based on the pairing relationship. For example, for a terminal accessing for the first time, if one of the synchronization signal pairs is selected for random access during the random access process, the terminal receives subsequent downlink signals in transmit diversity mode.

[0115] Optionally, high-level signaling indicates PDCCH and / or PDSCH transmission diversity. For example, the network configures the PDCCH resources for the terminal to monitor the paging message through high-level signaling, which are associated with two or more synchronization signal beams, and uses transmission diversity to receive the PDCCH and PDSCH corresponding to the paging message. It can be understood that the coverage area of ​​the two or more synchronization signal beams is the possible movement area of ​​the terminal, and the terminal determines the receiving beam for monitoring the paging message based on the signal strength of the synchronization signal measured most recently. For example, the synchronization signal beam with the largest signal strength among the two or more synchronization signal beams of the above-mentioned transmission diversity is selected as the receiving beam.

[0116] Optionally, the method further includes:

[0117] The terminal monitors the physical downlink control channel PDCCH and obtains the downlink control information DCI message;

[0118] The terminal determines whether a physical downlink shared channel (PDSCH) adopts a diversity transmission mode based on the first indication information included in the DCI message.

[0119] Optionally, the beam corresponding to the PDCCH is a beam in the beam combination of transmission diversity.

[0120] Optionally, the terminal determines, based on the first indication information included in the DCI message, whether a physical downlink shared channel PDSCH adopts a diversity transmission mode, including:

[0121] When the transmission mode corresponding to the PDCCH is diversity transmission, determining that the PDSCH adopts the diversity transmission transmission mode;

[0122] The configuration parameters of the transmission diversity of the PDSCH are the same as the configuration parameters of the transmission diversity of the PDCCH.

[0123] Specifically, PDSCH transmit diversity can be dynamically scheduled via DCI. For example, a one-bit field is introduced in the DCI to indicate the PDSCH transmission mode. For example, a value of 0 indicates single-beam transmission; a value of 1 indicates transmit diversity. If transmit diversity is used, the corresponding beam combination is selected from the candidate beam combinations. For example, the synchronization signal beam monitored by the DCI is defaulted to one of the beams in the beam combination, thereby determining the beam combination that contains the DCI monitoring beam.

[0124] For static or semi-static transmit diversity, the terminal starts receiving PDCCH and / or PDSCH using transmit diversity after determining the beam combination for transmit diversity. For dynamically scheduled transmit diversity, the terminal determines the PDSCH transmission mode according to the dynamic indication of the DCI.

[0125] Optionally, PDSCH uses the same transmission mode as PDCCH by default, and if transmit diversity is used, the parameters related to PDSCH transmit diversity remain consistent with the PDCCH transmit diversity configuration parameters (for example, beam combination, precoding matrix and corresponding resource mapping information, reference signal sequence generation parameters and corresponding time-frequency resource mapping information).

[0126] The PDCCH is quasi co-located (QCL) with a target reference signal (the target reference signal may be a synchronization signal or a channel state information reference signal (CSI-RS)).

[0127] Optionally, the target reference signal can be explicitly configured by the network side device for the terminal (for monitoring the beam of the PDCCH); or, a synchronization signal selected according to the synchronization process or the synchronization signal measurement result (for example, the synchronization signal with the best signal quality). It can be understood that there is an association between the target reference signal and the PDCCH time-frequency resource (for example, the time-frequency relative position between the synchronization signal defined by the NR system and the control resource set (Control Resource Set, CORESET) #0). After the terminal determines the target reference signal, it can determine the PDCCH time-frequency resource.

[0128] Exemplarily, when the configuration parameters of transmit diversity are indicated by DCI, the terminal determines the number of transmit diversity beams, such as two beams, four beams, etc. The transmit diversity beam can be transmit diversity between multiple reference signal (or synchronization signal) beams (for example, reference signal beams sent by multiple TRPs); or it can be the beams of each TRP in the TRP cluster corresponding to the reference signal beam.

[0129] It can be understood that the PDCCH monitoring beam is one of the transmission diversity beams, and the DCI is carried by the PDCCH.

[0130] Optionally, the DCI displays an indication of the beams participating in transmit diversity (e.g., the ID of the synchronization signal). For example, for two-beam transmit diversity, the DCI message indicates synchronization signal 0, indicating that the synchronization signal beam associated with the DCI and the beam of synchronization signal 0 perform transmit diversity. Optionally, the beam / reference signal number may not include the PDCCH monitoring beam. For example, if the synchronization signal beam associated with the DCI is synchronization signal 3, the DCI indicates that synchronization signal 0 and synchronization signal 1 perform transmit diversity.

[0131] Optionally, the terminal determines a precoding matrix for transmit diversity. Different numbers of beams for transmit diversity correspond to different precoding matrices.

[0132] If the PDCCH monitoring beam is one of the transmit diversity beams, the position of the PDCCH monitoring beam in the transmit diversity precoding matrix is ​​determined. It can be understood that different port numbers are associated with rows and columns of the precoding matrix according to the numbering order.

[0133] For example, the synchronization signal beam associated with the DCI is synchronization signal 3, and the DCI indicates that transmission diversity is performed on synchronization signal 0 and the DCI-associated beam. The DCI can explicitly indicate that the synchronization signal beam associated with the DCI corresponds to port 1002; correspondingly, synchronization signal 0 corresponds to port 1001. Alternatively, the terminal determines the corresponding port number based on the magnitude of the two synchronization signal numbers, for example, corresponding to ports 1001, 1002, and so on, in ascending order of magnitude.

[0134] Optionally, the terminal determines the generation parameters and time-frequency resource mapping locations of the DMRS sequences for each beam of diversity transmission. For example, a pseudo-random number seed for the DMRS sequence is generated based on the port number. DMRS resource mapping for different ports / different beams is performed in frequency, time, or code division based on the port number.

[0135] Optionally, the terminal receives the transmission diversity of the system information using a quasi-co-location assumption of the channel monitored by the PDCCH.

[0136] Example 1, as shown in Figure 7, in a cell-free network consisting of a macro cell and small cells, the macro cell sends multiple synchronization signal beams (first-level synchronization signals) to ensure cell coverage, while the small cells send multiple synchronization signals (second-level synchronization signals) to provide good signal quality for terminals within the small cell coverage. When scheduling system information transmission, the macro cell synchronization signal beams and the small cell synchronization signal beams can be used for transmit diversity.

[0137] For example, after the terminal obtains the cell ID through the second-level synchronization signal through the synchronization process, the terminal receives system information through the PDCCH associated with the second-level synchronization signal. The PDCCH indicates whether the terminal uses transmission diversity to receive PDSCH. The beam of the first-level synchronization signal of the macro station node and the beam of the second-level synchronization signal of the small station node are transmitted with diversity. According to the default rules, the beam of the first-level synchronization signal of the macro station is defined as port 1000, and the beam of the second-level synchronization signal of the small station is defined as port 1001. It can be understood that according to the network planning, the network side equipment can determine the correspondence between the beam of the first-level synchronization signal of the macro station and the beam of the second-level synchronization signal of the small station to ensure that the two beams point to the same coverage area (that is, the area where the terminal is located). According to predefined rules, the precoding method of the macro station signal and the small station signal, the generation parameters of the PDSCH DMRS sequence, and the resource mapping information are determined respectively.

[0138] Example 2, as shown in Figures 8 and 9, the synchronization signals of multiple small stations / multiple TRPs are used for transmission diversity. Multiple small stations or TRPs send synchronization signals separately, and the coverage areas of the synchronization signals of multiple TRPs overlap. For example, in the overlapping coverage area of ​​TRP1 and TRP2, terminal 1 chooses to use the synchronization signal of TRP1 as a reference to monitor PDCCH, and terminal 2 chooses to use the synchronization signal of TRP2 as a reference to monitor PDCCH. The network-side equipment uses TRP1 and TRP2 for transmission diversity, and uses the same time-frequency resources to transmit PDSCH (such as system information, broadcast or multicast information) to terminal 1 and terminal 2. According to the network configuration, the TRP1 transmission signal corresponds to the precoding matrix y(0) of the transmission diversity, and the TRP2 transmission signal corresponds to the precoding matrix y(1) of the transmission diversity. Therefore, the information in the DCI obtained by terminal 1 by monitoring PDCCH with the synchronization signal of TRP1 as a reference includes the trigger information of transmission diversity, the number of beams participating in transmission diversity (which can be defaulted to 2, or the number can be explicitly indicated), and the corresponding position of the TRP1 transmission signal in the precoding matrix.

[0139] For example, the precoding matrix is:

[0140] Optionally, if transmission diversity is triggered by DCI after the terminal reads the system information (including the ID and configuration information of each synchronization signal beam), the terminal can determine the synchronization signal beam participating in transmission diversity based on the beam combination information of the synchronization signal carried in the system information; or the DCI explicitly indicates the paired synchronization signal ID or reference signal ID.

[0141] Example 3: In a Cell-free network, transmit diversity is performed between two TRPs within a TRP cluster. As shown in Figure 10, synchronization signal 2 is jointly sent by TRP1 and TRP2, covering the boundary area between them.

[0142] Referring to FIG. 11 , an embodiment of the present application provides a diversity transmission method. The embodiment is performed by a network-side device. The method includes:

[0143] Step 201: A network-side device sends a transmission diversity configuration parameter to a terminal; the transmission diversity configuration parameter is used by the terminal to receive a signal sent by the network-side device based on first indication information or predefined rules.

[0144] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0145] Beam combining for transmit diversity;

[0146] Transmission mode;

[0147] The number of ports corresponding to the beam combination;

[0148] The port identifier corresponding to the beam combination;

[0149] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0150] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0151] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission.

[0152] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0153] predefined rules, second indication information;

[0154] The second indication information is indicated by at least one of the following: a master information block MIB message, a system information block SIB message, a radio resource control RRC, a medium access control element MAC CE message and a downlink control information DCI message.

[0155] Optionally, the first indication information includes at least one of the following:

[0156] Transmit diversity trigger information;

[0157] Transmission mode switching indication information.

[0158] Optionally, the beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination that is quasi-co-located with the synchronization signal beam in the synchronization signal beam set.

[0159] Optionally, the number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmit diversity;

[0160] The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmission diversity, or an inclusion relationship.

[0161] Optionally, the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination or the beam order or inclusion relationship in the beam combination.

[0162] Optionally, the first indication information is indicated by at least one of the following:

[0163] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, Medium Access Control (MAC) CE messages, and Downlink Control Information (DCI) messages.

[0164] The specific implementation process and technical effects of the method in this embodiment are similar to those in the terminal side method embodiment. For details, please refer to the detailed introduction in the terminal side method embodiment, and no further details will be given here.

[0165] The diversity transmission method provided in the embodiment of the present application can be executed by a diversity transmission device. In the embodiment of the present application, the diversity transmission device provided in the embodiment of the present application is described by taking the diversity transmission method performed by the diversity transmission device as an example.

[0166] FIG12 is a schematic diagram of a structure of a diversity transmission device provided in an embodiment of the present application. As shown in FIG12 , the diversity transmission device provided in this embodiment includes:

[0167] An acquisition module 110 is configured to acquire configuration parameters of transmit diversity;

[0168] The sending module 120 is configured to receive a signal sent by a network-side device based on the first indication information or a predefined rule and in accordance with the configuration parameters of the transmission diversity.

[0169] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0170] Beam combining for transmit diversity;

[0171] Transmission mode;

[0172] The number of ports corresponding to the beam combination;

[0173] The port identifier corresponding to the beam combination;

[0174] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0175] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0176] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission.

[0177] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0178] predefined rules, second indication information;

[0179] The second indication information is indicated by at least one of the following: a master information block MIB message, a system information block SIB message, a radio resource control RRC, a medium access control element MAC CE message and a downlink control information DCI message.

[0180] Optionally, the first indication information includes at least one of the following:

[0181] Transmit diversity trigger information;

[0182] Transmission mode switching indication information.

[0183] Optionally, the beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination that is quasi-co-located with the synchronization signal beam in the synchronization signal beam set.

[0184] Optionally, the number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmit diversity;

[0185] The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmission diversity, or an inclusion relationship.

[0186] Optionally, the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination or the beam order or inclusion relationship in the beam combination.

[0187] Optionally, the first indication information is indicated by at least one of the following:

[0188] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, Medium Access Control (MAC) CE messages, and Downlink Control Information (DCI) messages.

[0189] Optionally, in a case where the configuration parameters of the transmit diversity are determined by predefined rules, the acquisition module 110 includes a processing unit configured to determine the configuration parameters of the transmit diversity based on a layout of synchronization signals.

[0190] Optionally, the acquisition module 110 is further configured to:

[0191] Monitor the physical downlink control channel (PDCCH) and obtain downlink control information (DCI) messages;

[0192] The processing module is configured to determine whether a physical downlink shared channel (PDSCH) adopts a diversity transmission mode based on first indication information included in the DCI message.

[0193] Optionally, the beam corresponding to the PDCCH is a beam in a beam combination of transmission diversity.

[0194] Optionally, the processing module is specifically configured to:

[0195] When the transmission mode corresponding to the PDCCH is diversity transmission, determining that the PDSCH adopts the diversity transmission transmission mode;

[0196] The configuration parameters of the transmission diversity of the PDSCH are the same as the configuration parameters of the transmission diversity of the PDCCH.

[0197] Optionally, when the configuration parameter of the transmit diversity includes the transmission mode, the processing unit is specifically configured to:

[0198] The terminal determines, based on the layout of the synchronization signal, candidate resources of the synchronization signal;

[0199] The terminal searches for the synchronization signal based on the candidate resources to obtain a search result;

[0200] The terminal determines the transmission mode based on the search result;

[0201] The candidate resources include at least one of the following: a time-frequency position or a reference signal sequence; different candidate resources represent different transmission modes.

[0202] The device of this embodiment can be used to execute each process in the aforementioned terminal side method embodiment. Its specific implementation process and technical effects are similar to those in the terminal side method embodiment. For details, please refer to the detailed introduction in the terminal side method embodiment, which will not be repeated here.

[0203] FIG13 is a second structural diagram of a diversity transmission device provided in an embodiment of the present application. As shown in FIG13 , the diversity transmission device provided in this embodiment includes:

[0204] The sending module 210 is used to send the configuration parameters of the transmission diversity to the terminal; the configuration parameters of the transmission diversity are used by the terminal to receive the signal sent by the network side device based on the first indication information or predefined rules.

[0205] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0206] Beam combining for transmit diversity;

[0207] Transmission mode;

[0208] The number of ports corresponding to the beam combination;

[0209] The port identifier corresponding to the beam combination;

[0210] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0211] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0212] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission.

[0213] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0214] predefined rules, second indication information;

[0215] The second indication information is indicated by at least one of the following: a master information block MIB message, a system information block SIB message, a radio resource control RRC, a medium access control element MAC CE message and a downlink control information DCI message.

[0216] Optionally, the first indication information includes at least one of the following:

[0217] Transmit diversity trigger information;

[0218] Transmission mode switching indication information.

[0219] Optionally, the beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination that is quasi-co-located with the synchronization signal beam in the synchronization signal beam set.

[0220] Optionally, the number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmit diversity;

[0221] The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmission diversity, or an inclusion relationship.

[0222] Optionally, the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination or the beam order or inclusion relationship in the beam combination.

[0223] Optionally, the first indication information is indicated by at least one of the following:

[0224] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, Medium Access Control (MAC) CE messages, and Downlink Control Information (DCI) messages.

[0225] The device of this embodiment can be used to execute each process in the aforementioned network side device method embodiment. Its specific implementation process and technical effects are similar to those in the network side device method embodiment. For details, please refer to the detailed description in the network side device method embodiment, which will not be repeated here.

[0226] The diversity transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0227] The diversity transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 11 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0228] As shown in Figure 14, an embodiment of the present application further provides a communication device 1400, including a processor 1401 and a memory 1402. The memory 1402 stores a program or instruction that can be executed on the processor 1401. For example, when the communication device 1400 is a terminal, the program or instruction, when executed by the processor 1401, implements the various steps of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. When the communication device 1400 is a network-side device, the program or instruction, when executed by the processor 1401, implements the various steps of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0229] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in any of the method embodiments shown in Figures 2-10. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 15 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0230] The terminal 1500 includes but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509 and at least some of the components of the processor 1510.

[0231] Those skilled in the art will appreciate that the terminal 1500 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1510 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG15 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0232] It should be understood that in an embodiment of the present application, the input unit 1504 may include a graphics processing unit (GPU) 15041 and a microphone 15042, and the graphics processor 15041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1507 includes a touch panel 15071 and at least one of other input devices 15072. The touch panel 15071 is also called a touch screen. The touch panel 15071 may include two parts: a touch detection device and a touch controller. Other input devices 15072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0233] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1501 may transmit the data to the processor 1510 for processing. Furthermore, the radio frequency unit 1501 may send uplink data to the network-side device. Typically, the radio frequency unit 1501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0234] The memory 1509 can be used to store software programs or instructions and various data. The memory 1509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1509 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 1509 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0235] Processor 1510 may include one or more processing units. Optionally, processor 1510 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1510.

[0236] The processor 1510 is configured to obtain configuration parameters of transmit diversity;

[0237] The radio frequency unit 1501 is configured to receive a signal sent by a network-side device according to the configuration parameters of the transmission diversity based on the first indication information or predefined rules.

[0238] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0239] Beam combining for transmit diversity;

[0240] Transmission mode;

[0241] The number of ports corresponding to the beam combination;

[0242] The port identifier corresponding to the beam combination;

[0243] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0244] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0245] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission.

[0246] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0247] predefined rules, second indication information;

[0248] The second indication information is indicated by at least one of the following: a master information block MIB message, a system information block SIB message, a radio resource control RRC, a medium access control element MAC CE message and a downlink control information DCI message.

[0249] Optionally, the first indication information includes at least one of the following:

[0250] Transmit diversity trigger information;

[0251] Transmission mode switching indication information.

[0252] Optionally, the beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination that is quasi-co-located with the synchronization signal beam in the synchronization signal beam set.

[0253] Optionally, the number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmit diversity;

[0254] The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmission diversity, or an inclusion relationship.

[0255] Optionally, the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination or the beam order or inclusion relationship in the beam combination.

[0256] Optionally, the first indication information is indicated by at least one of the following:

[0257] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, Medium Access Control (MAC) CE messages, and Downlink Control Information (DCI) messages.

[0258] Optionally, in a case where the configuration parameters of the transmit diversity are determined by predefined rules, the acquisition module 110 includes a processing unit configured to determine the configuration parameters of the transmit diversity based on a layout of synchronization signals.

[0259] Optionally, the processor 1510 is further configured to:

[0260] Monitor the physical downlink control channel (PDCCH) and obtain downlink control information (DCI) messages;

[0261] Based on the first indication information included in the DCI message, it is determined whether a physical downlink shared channel (PDSCH) adopts a diversity transmission mode.

[0262] Optionally, the beam corresponding to the PDCCH is a beam in a beam combination of transmission diversity.

[0263] Optionally, the processor 1510 is specifically configured to:

[0264] When the transmission mode corresponding to the PDCCH is diversity transmission, determining that the PDSCH adopts the diversity transmission transmission mode;

[0265] The configuration parameters of the transmission diversity of the PDSCH are the same as the configuration parameters of the transmission diversity of the PDCCH.

[0266] Optionally, when the configuration parameter of the transmit diversity includes the transmission mode, the processor 1510 is specifically configured to:

[0267] The terminal determines, based on the layout of the synchronization signal, candidate resources of the synchronization signal;

[0268] The terminal searches for the synchronization signal based on the candidate resources to obtain a search result;

[0269] The terminal determines the transmission mode based on the search result;

[0270] The candidate resources include at least one of the following: a time-frequency position or a reference signal sequence; different candidate resources represent different transmission modes.

[0271] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the terminal side method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0272] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG11 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0273] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 16, network-side device 1600 includes an antenna 161, a radio frequency device 162, a baseband device 163, a processor 164, and a memory 165. Antenna 161 is connected to radio frequency device 162. In the uplink direction, radio frequency device 162 receives information via antenna 161 and sends the received information to baseband device 163 for processing. In the downlink direction, baseband device 163 processes the information to be transmitted and sends it to radio frequency device 162. Radio frequency device 162 processes the received information and then sends it through antenna 161.

[0274] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 163 , which includes a baseband processor.

[0275] The baseband device 163 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 16, one of the chips is, for example, a baseband processor, which is connected to the memory 165 through a bus interface to call the program in the memory 165 and execute the network device operations shown in the above method embodiment.

[0276] The network side device may further include a network interface 166 , which is, for example, a Common Public Radio Interface (CPRI).

[0277] Specifically, the network side device 1600 of the embodiment of the present application also includes: instructions or programs stored in the memory 165 and executable on the processor 164. The processor 164 calls the instructions or programs in the memory 165 to execute the methods of execution of each module shown in FIG13 and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0278] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned diversity transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0279] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0280] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned diversity transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0281] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0282] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0283] An embodiment of the present application further provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the diversity transmission method described above, and the network-side device can be used to execute the steps of the diversity transmission method described above.

[0284] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0285] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0286] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A diversity transmission method, comprising: The terminal obtains configuration parameters of transmission diversity; Based on first indication information or a predefined rule, the terminal receives a signal sent by a network side device according to the configuration parameters of the transmission diversity.

2. The method according to claim 1, wherein The configuration parameters of the transmission diversity include at least one of the following: Beam combination of transmission diversity; Transmission mode; The number of ports corresponding to the beam combination; The port identifier corresponding to the beam combination; Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence; Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

3. The method according to claim 2, wherein The transmission mode includes at least one of the following: single beam or single port transmission, multi-beam or multi-port diversity transmission.

4. The method according to any one of claims 1-3, wherein The configuration parameters of the transmission diversity are determined by at least one of the following: Predefined rule, second indication information; The second indication information is indicated by at least one of the following: master information block MIB message, system information block SIB message, radio resource control RRC, medium access control unit MAC CE message, and downlink control information DCI message.

5. The method according to any one of claims 1-4, wherein The first indication information includes at least one of the following: Trigger information of transmission diversity; Switching indication information of the transmission mode.

6. The method according to claim 2 or 3, wherein The beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination quasi-co-located with a synchronization signal beam in the synchronization signal beam set.

7. The method according to claim 2 or 3, wherein The number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmission diversity; The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmission diversity, or an inclusion relationship.

8. The method according to claim 2 or 3, wherein The resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination, or the beam order in the beam combination, or an inclusion relationship.

9. The method according to claim 5, wherein The first indication information is indicated by at least one of the following: Master information block MIB message, system information block SIB message, radio resource control RRC message, medium access control unit MAC CE message, and downlink control information DCI message.

10. The method according to claim 4, wherein When the configuration parameters of the transmission diversity are determined by a predefined rule, the terminal obtaining the configuration parameters of the transmission diversity includes: The terminal determines the configuration parameters of the transmission diversity based on the layout mode of the synchronization signal.

11. According to the method according to any one of claims 1-10, wherein, The method further includes: The terminal monitors a physical downlink control channel PDCCH and obtains a downlink control information DCI message; The terminal determines whether the physical downlink shared channel (PDSCH) adopts a transmission mode of diversity transmission based on the first indication information included in the DCI message.

12. The method according to claim 11, wherein The beam corresponding to the PDCCH is one beam in the beam combination of transmit diversity.

13. The method according to claim 11, wherein, The terminal determines whether the physical downlink shared channel (PDSCH) adopts a transmission mode of diversity transmission based on the first indication information included in the DCI message, including: When the transmission mode corresponding to the PDCCH is transmit diversity, determining that the PDSCH adopts a transmission mode of diversity transmission; The configuration parameters of the transmit diversity of the PDSCH are the same as those of the transmit diversity of the PDCCH.

14. The method according to claim 10, wherein When the configuration parameters of the transmit diversity include the transmission mode, the terminal determines the configuration parameters of the transmit diversity based on the layout mode of the synchronization signal, including: The terminal determines the candidate resources of the synchronization signal based on the layout mode of the synchronization signal; The terminal searches for the synchronization signal based on the candidate resources to obtain a search result; The terminal determines the transmission mode based on the search result; The candidate resources include at least one of the following: time-frequency position or reference signal sequence; different candidate resources represent different transmission modes.

15. A diversity transmission method, including: The network side device sends configuration parameters of transmit diversity to the terminal; The configuration parameters of the transmit diversity are used for the terminal to receive the signal sent by the network side device based on the first indication information or a predefined rule.

16. The method according to claim 15, wherein The configuration parameters of the transmit diversity include at least one of the following: Beam combination of transmit diversity; Transmission mode; The number of ports corresponding to the beam combination; The port identifier corresponding to the beam combination; The generation parameters of the reference signal sequence corresponding to the beam combination, and the time-frequency resource mapping information of the reference signal sequence; The precoding information corresponding to the beam combination and the resource mapping information corresponding to the precoding information.

17. The method according to claim 16, wherein The transmission mode includes at least one of the following: single beam or single port transmission, multi-beam or multi-port diversity transmission.

18. The method according to any one of claims 15-17, wherein The configuration parameters of the transmit diversity are determined by at least one of the following: Predefined rule, second indication information; The second indication information is indicated by at least one of the following: master information block (MIB) message, system information block (SIB) message, radio resource control (RRC), medium access control unit (MAC) control element (CE) message, and downlink control information (DCI) message.

19. The method according to any one of claims 15-18, wherein The first indication information includes at least one of the following: Trigger information of transmit diversity; Switching indication information of the transmission mode.

20. The method according to claim 16 or 17, wherein The beam combination is a synchronization signal beam combination in a preset synchronization signal beam set, or a reference signal beam combination that is quasi-co-located with the synchronization signal in the synchronization signal beam set.

21. The method according to claim 16 or 17, wherein the number of ports corresponding to the beam combination is equal to the number of beams in the beam combination of the transmit diversity; the port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmit diversity or the inclusion relationship.

22. The method according to claim 16 or 17, wherein the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination, the beam order in the beam combination, or the inclusion relationship.

23. The method according to claim 19, wherein the first indication information is indicated by at least one of the following: master information block (MIB) message, system information block (SIB) message, radio resource control (RRC) message, medium access control element (MAC CE) message, and downlink control information (DCI) message.

24. A diversity transmission device, comprising: an acquisition module, configured to acquire configuration parameters of transmit diversity; a transmission module, configured to receive a signal sent by a network-side device according to the configuration parameters of the transmit diversity based on first indication information or a predefined rule.

25. A diversity transmission device, comprising: a transmission module, configured to send configuration parameters of transmit diversity to a terminal; the configuration parameters of the transmit diversity are used for the terminal to receive a signal sent by a network-side device based on first indication information or a predefined rule.

26. A terminal, comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the diversity transmission method according to any one of claims 1 to 14 are implemented.

27. A network-side device, comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the diversity transmission method according to any one of claims 15 to 23 are implemented.

28. A readable storage medium, where a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the diversity transmission method according to any one of claims 1 to 14 are implemented, or the steps of the diversity transmission method according to any one of claims 15 to 23 are implemented.

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