Diversity transmission method, terminal and network-side device

Abstract

The present application belongs to the technical field of communications. Disclosed are a diversity transmission method, a terminal and a network-side device. The diversity transmission method in the embodiments of the present application comprises: a terminal determining a configuration parameter of transmission diversity; and on the basis of the configuration parameter of the transmission diversity, the terminal monitoring control information 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 202311843697.4 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 control 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 determines the configuration parameters of transmit diversity;

[0009] The terminal monitors control information sent by a network-side device based on the configuration parameters of the transmission diversity.

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

[0011] The network side device sends the configuration parameters of the transmission diversity to the terminal; the configuration parameters of the transmission diversity are used to monitor the control information sent by the network side device.

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

[0013] a processing module, configured to determine configuration parameters of transmit diversity;

[0014] The processing module is further configured to monitor control information sent by a network-side device based on 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 the transmission diversity to the terminal; the configuration parameters of the transmission diversity are used to monitor the control information sent by the network side device.

[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 by the terminal to determine the configuration parameters of transmission diversity; and the communication interface is used to monitor the control information sent by the network side device based on the configuration parameters of the transmission diversity.

[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 to monitor control information sent by the network side device.

[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 determines the configuration parameters of transmission diversity; the terminal monitors the control information sent by the network side device based on the configuration parameters of the transmission diversity, and the network side device can send control information to the terminal based on transmission diversity, thereby improving the transmission efficiency of the control 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 MIB-based transmission diversity indication of a diversity transmission method provided in an embodiment of the present application;

[0030] FIG5 is a schematic diagram of a diversity transmission method within a TRP cluster according to an embodiment of the present application;

[0031] FIG6 is a schematic diagram of one of the resource mapping principles of the diversity transmission method provided in an embodiment of the present application;

[0032] FIG7 is a second schematic diagram of the resource mapping principle of the diversity transmission method provided in an embodiment of the present application;

[0033] FIG8 is a third schematic diagram of the resource mapping principle of the diversity transmission method provided in an embodiment of the present application;

[0034] FIG9 is a second flow chart of the diversity transmission method provided in an embodiment of the present application;

[0035] FIG10 is a schematic diagram of a structure of a diversity transmission device according to an embodiment of the present application;

[0036] FIG11 is a second structural diagram of a diversity transmission device according to an embodiment of the present application;

[0037] FIG12 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0038] FIG13 is a schematic structural diagram of a terminal according to an embodiment of the present application;

[0039] FIG14 is a schematic structural diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] First, the technical terms and application scenarios involved in the embodiments of this application are introduced:

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] However, from the perspective of resource utilization efficiency, for the same broadcast / multicast information (PDSCH or PDCCH), the NR base station needs to use different synchronization signal (synchronization signal block SSB) beams in turn to send them in sequence, which reduces resource utilization efficiency. In addition, for different terminal distributions or in different time periods (such as peak hours and idle periods), in certain time periods, there may be some SSB beam coverage areas with a large number of terminals and some SSB beam coverage areas with a small number of terminals, resulting in an unbalanced load of the PDCCH and PDSCH corresponding to different SSB beams. Therefore, in the method of the embodiment of the present application, for adjacent areas with fewer terminals, the network side device can choose to implement transmission diversity in the two SSB beam coverage areas to save the time-frequency resource overhead of the broadcast / multicast signal.

[0052] Furthermore, the 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 synchronization signal transmission and system information transmission can ensure that the terminal discovers the cell, but beam-based system information transmission will lead to an increase in the time and frequency resources occupied by the system information, especially when the number of synchronization signal beams in the cell-free network continues to increase. In the Cell-free network, in order to achieve collaborative transmission between TRP nodes, the coverage areas of each TRP node need to have a certain degree of overlap. This also means that terminals in the overlapping coverage area can receive synchronization signals sent by multiple TRP nodes, thereby using transmission diversity to receive the cell-level PDCCH and PDSCH of multiple TRP nodes.

[0053] Connected terminals can use multiple TRPs to achieve coherent or multi-stream transmission based on channel measurement feedback. However, in the disconnected 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. 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.

[0054] 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.

[0055] 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.

[0056] 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:

[0057] Step 101: The terminal determines the configuration parameters of transmit diversity;

[0058] Specifically, the transmission diversity configuration parameters may be obtained through predefined rules or information indicated by a network-side device. For example, the predefined rules may be the layout of synchronization signals. The terminal determines the transmission diversity configuration parameters based on the layout of synchronization signals or system information or higher-layer signaling sent by the network-side device, such as beam combination information and time-frequency resource information of control information corresponding to the beam combination, such as the time-frequency resource location of the control information.

[0059] Step 102: The terminal monitors the control information sent by the network-side device based on the configuration parameters of the transmission diversity.

[0060] Specifically, the terminal detects control information sent by the network side device based on the configuration parameters of transmit diversity, such as downlink control information DCI, for example, by monitoring the PDCCH to obtain the DCI.

[0061] For example, the terminal determines the time-frequency resource location of the PDCCH control channel according to the configuration parameters of the transmission diversity, and detects the control information according to the transmission mode of the diversity transmission.

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

[0063] Optionally, the method may be applied to monitoring of a PDCCH before the terminal is in a connected state, and monitoring of a paging PDCCH in an idle state.

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

[0065] Transmit diversity trigger information;

[0066] Beam combining for transmit diversity;

[0067] Transmission mode;

[0068] The number of ports corresponding to the beam combination;

[0069] The port identifier corresponding to the beam combination;

[0070] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0071] precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information;

[0072] The time-frequency resource mapping information of the control information corresponding to the beam combination.

[0073] Optionally, the beam in the beam combination is a synchronization signal beam or a reference signal beam.

[0074] The beam combination of transmit diversity is, for example, a plurality of candidate beam combinations, and each beam combination includes specific beams.

[0075] Optionally, the port identifier may be represented by a port number, for example.

[0076] Optionally, the reference signal sequence may be, for example, a demodulation reference signal (DMRS) sequence.

[0077] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission.

[0078] 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.

[0079] Optionally, the time-frequency resource mapping information of the control information is, for example, a control resource set (CORESET)

[0080] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0081] predefined rules, first indication information;

[0082] The first 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) message, and a medium access control element (MAC CE) message.

[0083] 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.

[0084] 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.

[0085] Alternatively, the configuration parameters of transmission diversity are indicated through an SIB message, for example, the SIB message indicates the beam combination information of the synchronization signal beam participating in transmission diversity, or the PDCCH and / or PDSCH corresponding to the beam combination of the synchronization signal beam uses transmission diversity.

[0086] Alternatively, the configuration parameters of transmission diversity are indicated through high-layer signaling (such as RRC messages and / or MAC CE messages), for example, indicating beam combination information of a synchronization signal or CSI-RS beam, enabling or disabling the transmission diversity of the beam combination (for example, transmission diversity of PDCCH and / or PDSCH of a paging message).

[0087] 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 and the corresponding PDCCH time-frequency resources. MAC CE signaling is then used to activate the terminal to use one of the candidate beam combinations to implement PDCCH transmit diversity.

[0088] 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.

[0089] 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;

[0090] 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.

[0091] The beam order or port number order may be an order in which the beam numbers are arranged in sequence. For example, the port numbers are determined according to the SSB number order, where beam 1 corresponds to port number 1001 and beam 2 corresponds to port number 1002. For example, the corresponding transmit diversity port number is determined based on the number of the reference signal corresponding to the transmit diversity beam.

[0092] For example, the inclusion relationship refers to the inclusion relationship between the upper-level synchronization signal beam and the lower-level synchronization signal beam in a cell-free network. For example, primary synchronization signal beam 1 and secondary synchronization signal beams 1-1 and 1-2 perform transmission diversity. Primary synchronization signal beam 1 is the beam of the macro node, and secondary synchronization signal beams 1-1 and 1-2 are the beams of the small cell nodes under the coverage of the macro node. For example, the primary synchronization signal beam corresponds to port number 1001, and the secondary synchronization signal beam corresponds to port number 1002.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] Optionally, according to predefined rules, transmission mode 1 (for example, single-beam transmission / single-port transmission) is the default transmission mode of idle state PDCCH or PDSCH, and the network side device explicitly indicates the switching of the transmission mode of a downlink physical channel (for example, switching to transmission mode 2 (diversity transmission)) through MAC CE or RRC message.

[0097] 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:

[0098] The terminal determines the configuration parameters of the transmission diversity based on the layout of the synchronization signal.

[0099] 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:

[0100] The terminal determines, based on the layout of the synchronization signal, candidate resources of the synchronization signal;

[0101] The terminal searches for the synchronization signal based on the candidate resource set to obtain a search result;

[0102] The terminal determines the transmission mode based on the search result;

[0103] The candidate resources include at least one of the following: a time-frequency position or a reference signal sequence; different candidate resource sets represent different transmission modes.

[0104] 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 PDCCH single-beam transmission, and the other type of sync raster is used for candidate synchronization signal frequencies for PDCCH 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.

[0105] For example, whether to use transmit diversity is determined by time-frequency position or a reference signal sequence (such as a preamble sequence set). The protocol defines two types of synchronization signal preamble sets corresponding to different synchronization signal transmissions: one type of preamble set is used for the synchronization signal of PDCCH single-beam transmission, and the other type of preamble set is used for the synchronization signal of PDCCH transmit diversity.

[0106] 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.

[0107] Optionally, the predefined rule may be that the synchronization signals detected within 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 within 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.

[0108] 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. For example, the determination rule of the synchronization signal beam combination is predefined. For example, if 4 synchronization signal beams are included in a time period, 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 4, the 4 SSBs in a time slot are SSB#0, SSB#1, SSB#2, and SSB#3. By reading the MIB messages corresponding to the four SSBs, the SSBs that enable 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 uses the transmission diversity of SSB#0 and SSB#1 in the subsequent process to receive the downlink signal PDCCH and / or PDSCH. 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 5, 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.

[0109] 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.

[0110] Optionally, high-level signaling indicates PDCCH and / or PDSCH transmission diversity. For example, the network configures the PDCCH resources for the terminal to monitor paging messages through high-level signaling, which are associated with two or more synchronization signal beams, and the corresponding PDCCH and PDSCH use transmission diversity to receive paging messages. 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.

[0111] Optionally, the control information is carried by a physical downlink control channel PDCCH, and the control information is used to schedule a physical downlink shared channel PDSCH, where the PDSCH is a PDSCH for diversity transmission or a PDSCH for single beam transmission.

[0112] Optionally, the transmission mode of the PDSCH is consistent with the transmission mode of the PDCCH.

[0113] Optionally, the control information includes second indication information, and the second indication information is used to indicate beam information for transmitting the PDSCH.

[0114] Optionally, the single beam used for the single-beam transmission is a beam in a beam combination for diversity transmission.

[0115] Optionally, the second indication information is represented by a bitmap, and a length of the bitmap is the same as the number of beams in the beam combination of transmit diversity;

[0116] The bits of the bitmap correspond one-to-one to the ports corresponding to the beams in the beam combination of transmit diversity.

[0117] Specifically, the PDSCH is scheduled by the control information (DCI) for transmit diversity, which can be a PDSCH for transmit diversity or a PDSCH for single-beam transmission. For example, by default, the PDSCH transmission mode remains consistent with the transmission mode of the control information, and the relevant configuration parameters are consistent with the configuration parameters of the control channel. The control information schedules the PDSCH to be transmitted according to a single beam, and optionally, the single beam is one of the beams for transmit diversity. Optionally, the control information includes a field (such as second indication information) for indicating the PDSCH transmission beam.

[0118] For example, the second indication information is indicated in a bitmap manner, wherein the length of the bitmap is the same as the number of beams in the beam combination of transmit diversity, and each bit of the bitmap corresponds one-to-one to the transmit diversity beam in the order of the port numbers. For example, the base station determines that the channel condition of the terminal is suitable for single-beam transmission based on the uplink received signal, and can schedule it as PDSCH single-beam transmission, that is, concentrate the power on one synchronization signal beam. For example, in the random access process, the terminal monitors CORESET#0 and Msg2 messages according to transmit diversity. After the terminal sends Msg3, the base station determines whether the subsequent downlink PDSCH uses transmit diversity based on the signal reception quality of Msg3 on each beam of transmit diversity. For example, if the signal quality of Msg3 of each beam is not much different, it is suitable to use transmit diversity; otherwise, it is suitable to use single-beam transmission.

[0119] Optionally, the terminal determines configuration parameters of transmit diversity, including:

[0120] The terminal determines, based on the beam combination and mapping rule included in the configuration parameters of the transmit diversity, time-frequency resource mapping information of the control information corresponding to the beam combination;

[0121] The mapping rule includes at least one of the following:

[0122] Each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information;

[0123] The beam combination as a whole is mapped to the time-frequency resources corresponding to the control information.

[0124] Specifically, after determining the beam combination for transmit diversity, the correspondence between the PDCCH time-frequency resources and the beam is determined. For example, based on the SIB message, the terminal can determine the mapping relationship between the synchronization signal beam and the PDCCH monitoring occasion, as well as whether each PDCCH time-frequency resource is used for transmit diversity.

[0125] Optionally, each beam is independently mapped according to the time-frequency offset between the synchronization signal beam and the PDCCH time-frequency resources in the configuration parameters. After the mapping result is determined, the PDCCH corresponding to each synchronization signal beam monitors the PDCCH according to the corresponding transmission mode; or the beam combination of transmission diversity is mapped together with the PDCCH time-frequency resources as a whole, and the PDCCH is monitored according to transmission diversity on the corresponding PDCCH time-frequency resources; or, each beam is independently mapped according to the time-frequency offset between the synchronization signal beam and the PDCCH time-frequency resources in the configuration parameters. When the PDCCH time-frequency resources corresponding to each beam in the beam combination overlap, transmission diversity is used to monitor the PDCCH, otherwise the PDCCH is monitored according to the single-beam transmission mode; or, each beam is independently mapped according to the time-frequency offset between the synchronization signal beam and the PDCCH time-frequency resources in the configuration parameters, and each transmission diversity beam combination is mapped according to the time-frequency offset between the synchronization signal beam combination and the PDCCH time-frequency resources in the dedicated configuration parameters, and the PDCCH time-frequency resource mapping relationship corresponding to each transmission mode is determined respectively. Optionally, the configuration parameters of the transmission diversity also include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission. It can be understood that when the network does not configure a dedicated second search space for the transmission diversity mode, it reuses the first search space for single-beam transmission. Furthermore, the priority between different transmission modes (single-beam transmission and transmission) is defined according to protocol pre-definition or network configuration; when the PDCCH time-frequency resources or search spaces of different transmission modes overlap / conflict, or exceed the upper limit of the terminal's control information blind detection number, the terminal will prioritize searching the corresponding search space of the high-priority transmission mode according to the priority of the different transmission modes.

[0126] Optionally, the terminal monitors control information sent by a network-side device based on the configuration parameters of the transmit diversity, including at least one of the following:

[0127] When each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, the terminal monitors the control information sent by the network side device in a second search space in a diversity transmission manner based on the configuration parameters of the transmit diversity;

[0128] When each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, the terminal monitors the control information sent by the network side device in the first search space in a single-beam transmission manner based on the configuration parameters of each beam;

[0129] Each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, and when the time-frequency resources of the control information corresponding to the beam combination overlap, the terminal monitors the control information sent by the network side device in a diversity transmission manner on a second search space based on the configuration parameters of the transmit diversity;

[0130] When each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information, and the time-frequency resources of the control information corresponding to the beam combination do not overlap, the terminal listens to the control information sent by the network side device in the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmission diversity.

[0131] Specifically, as shown in FIG6 , assuming that SSB#0 and SSB#1 perform transmit diversity, each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information. The terminal monitors the control information sent by the network device in the second search space in a diversity transmission manner based on the configuration parameters of the transmit diversity.

[0132] Alternatively, each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information, and the terminal listens to the control information sent by the network side device in the first search space in a single beam transmission manner based on the configuration parameters of the transmission diversity.

[0133] As shown in FIG7 , each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information. When the time-frequency resources of the control information corresponding to each beam overlap, the terminal monitors the control information sent by the network side device in the second search space in a diversity transmission manner based on the configuration parameters of the transmission diversity; or

[0134] Each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information. When the time-frequency resources of the control information corresponding to each beam do not overlap, the terminal listens to the control information sent by the network side device in the first search space in a single-beam transmission manner based on the configuration parameters of the transmission diversity.

[0135] Optionally, when the beam combination is mapped as a whole to the time-frequency resources corresponding to the control information, the terminal monitors the control information sent by the network side device based on the configuration parameters of the transmit diversity, including at least one of the following:

[0136] The terminal monitors the control information sent by the network side device in a second search space in a diversity transmission manner based on the configuration parameters of the transmission diversity;

[0137] The terminal monitors the control information sent by the network side device in the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmission diversity.

[0138] Specifically, as shown in FIG8 , assuming that SSB#0 and SSB#1 perform transmit diversity, when the beam combination as a whole is mapped to the time-frequency resources corresponding to the control information, the terminal monitors the control information sent by the network side device in the second search space in a diversity transmission manner based on the configuration parameters of the transmit diversity; or,

[0139] The terminal monitors the control information sent by the network side device in the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmission diversity.

[0140] It can be understood that the first search space and the second search space are predefined by a protocol, or configured through a system message or a high-layer signaling.

[0141] Optionally, the terminal monitors the PDCCH signal corresponding to the synchronization signal beam combination in a transmission diversity manner, and the configuration parameters of the PDCCH transmission determined according to the system message / high-level signaling / predefined rules 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; 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; the time-frequency resource mapping information of the control information corresponding to the beam combination.

[0142] For example, the terminal determines the port number based on the synchronization signal number in the beam combination, determines the resource mapping position in the precoding matrix based on different port numbers, determines different orthogonal covering codes (OCCs) for the DMRS based on different port numbers, or determines different time-frequency resource mapping positions.

[0143] In the above implementation, different transmission modes and resource mapping schemes are used to monitor the control information sent by the network side device, which has great flexibility.

[0144] Referring to FIG. 9 , an embodiment of the present application provides a diversity transmission method. The embodiment is performed by a network-side device. The method includes:

[0145] Step 201: The network-side device sends the configuration parameters of transmit diversity to the terminal; the configuration parameters of transmit diversity are used to monitor the control information sent by the network-side device.

[0146] It can be understood that the terminal receives the configuration parameters of the transmission diversity sent by the network-side device and can monitor the control information sent by the network-side device based on the configuration parameters of the transmission diversity.

[0147] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0148] Transmit diversity trigger information;

[0149] Beam combining for transmit diversity;

[0150] Transmission mode;

[0151] The number of ports corresponding to the beam combination;

[0152] The port identifier corresponding to the beam combination;

[0153] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0154] precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information;

[0155] The time-frequency resource mapping information of the control information corresponding to the beam combination.

[0156] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0157] predefined rules, first indication information;

[0158] The first indication information is carried by at least one of the following:

[0159] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, and Medium Access Control (MAC) control element (CE) messages.

[0160] Optionally, the configuration parameters of the transmission diversity further include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission.

[0161] Optionally, the control information is carried by a physical downlink control channel PDCCH, and the control information is used to schedule a physical downlink shared channel PDSCH, where the PDSCH is a PDSCH for diversity transmission or a PDSCH for single beam transmission.

[0162] Optionally, the transmission mode of the PDSCH is consistent with the transmission mode of the PDCCH.

[0163] Optionally, the control information includes second indication information, and the second indication information is used to indicate beam information for transmitting the PDSCH.

[0164] Optionally, the single beam used for the single-beam transmission is a beam in a beam combination for diversity transmission.

[0165] Optionally, the second indication information is represented by a bitmap, and a length of the bitmap is the same as the number of beams in the beam combination of transmit diversity;

[0166] The bits of the bitmap correspond one-to-one to the ports corresponding to the beams in the beam combination of transmit diversity.

[0167] 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.

[0168] 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.

[0169] FIG10 is a schematic diagram of a structure of a diversity transmission device provided in an embodiment of the present application. As shown in FIG10 , the diversity transmission device provided in this embodiment includes:

[0170] The processing module 110 is configured to determine configuration parameters of transmit diversity;

[0171] The processing module 110 is further configured to monitor control information sent by a network-side device based on the configuration parameters of the transmission diversity.

[0172] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0173] Transmit diversity trigger information;

[0174] Beam combining for transmit diversity;

[0175] Transmission mode;

[0176] The number of ports corresponding to the beam combination;

[0177] The port identifier corresponding to the beam combination;

[0178] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0179] precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information;

[0180] The time-frequency resource mapping information of the control information corresponding to the beam combination.

[0181] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0182] predefined rules, first indication information;

[0183] The first indication information is carried by at least one of the following:

[0184] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, and Medium Access Control (MAC) control element (CE) messages.

[0185] Optionally, the processing module 110 is specifically configured to:

[0186] Determining time-frequency resource mapping information of a control channel corresponding to the beam combination based on the beam combination and the mapping rule included in the configuration parameters of the transmit diversity;

[0187] The mapping rule includes at least one of the following:

[0188] Each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control channel;

[0189] The beam combination as a whole is mapped to the time-frequency resources corresponding to the control channel.

[0190] Optionally, the configuration parameters of the transmission diversity further include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission.

[0191] Optionally, the processing module 110 is specifically configured to perform at least one of the following:

[0192] When each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, monitoring the control information sent by the network side device in a second search space in a diversity transmission manner based on the configuration parameters of the transmission diversity;

[0193] When each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, monitoring the control information sent by the network-side device in the first search space in a single-beam transmission manner based on the configuration parameters of each beam;

[0194] Mapping each beam in the beam combination according to the offset information of the time-frequency resource corresponding to the control information, and when the time-frequency resources of the control information corresponding to the beam combination overlap, monitoring the control information sent by the network side device in a diversity transmission manner on a second search space based on the configuration parameters of the transmission diversity;

[0195] When each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information, and the time-frequency resources of the control information corresponding to the beam combination do not overlap, the control information sent by the network side device is listened to in the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmission diversity.

[0196] Optionally, when the beam combination as a whole is mapped to the time-frequency resources corresponding to the control information, the processing module 110 is specifically configured to perform at least one of the following:

[0197] Based on the configuration parameters of the transmission diversity, monitoring the control information sent by the network side device in the second search space in a diversity transmission manner;

[0198] Based on the configuration parameters of the transmission diversity, the control information sent by the network side device is monitored in the first search space in a single-beam or single-port transmission manner.

[0199] Optionally, the control information is carried by a physical downlink control channel PDCCH, and the control information is used to schedule a physical downlink shared channel PDSCH, and the PDSCH is a PDSCH for multi-beam diversity transmission, or a PDSCH for single-beam transmission.

[0200] Optionally, the transmission mode of the PDSCH is consistent with the transmission mode of the PDCCH.

[0201] Optionally, the control information includes second indication information, and the second indication information is used to indicate beam information for transmitting the PDSCH.

[0202] Optionally, the single beam used for the single-beam transmission is a beam in a beam combination for diversity transmission.

[0203] Optionally, the second indication information is represented by a bitmap, and a length of the bitmap is the same as the number of beams in the beam combination of transmit diversity;

[0204] The bits of the bitmap correspond one-to-one to the ports corresponding to the beams in the beam combination of transmit diversity.

[0205] 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.

[0206] FIG11 is a second structural diagram of a diversity transmission device provided in an embodiment of the present application. As shown in FIG11 , the diversity transmission device provided in this embodiment includes:

[0207] The sending module 210 is configured to send the configuration parameters of the transmission diversity to the terminal; the configuration parameters of the transmission diversity are used to monitor the control information sent by the network side device.

[0208] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0209] Transmit diversity trigger information;

[0210] Beam combining for transmit diversity;

[0211] Transmission mode;

[0212] The number of ports corresponding to the beam combination;

[0213] The port identifier corresponding to the beam combination;

[0214] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0215] precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information;

[0216] The time-frequency resource mapping information of the control information corresponding to the beam combination.

[0217] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0218] predefined rules, first indication information;

[0219] The first indication information is carried by at least one of the following:

[0220] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, and Medium Access Control (MAC) control element (CE) messages.

[0221] Optionally, the configuration parameters of the transmission diversity further include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission.

[0222] Optionally, the control information is carried by a physical downlink control channel PDCCH, and the control information is used to schedule a physical downlink shared channel PDSCH, where the PDSCH is a PDSCH for diversity transmission or a PDSCH for single beam transmission.

[0223] Optionally, the transmission mode of the PDSCH is consistent with the transmission mode of the PDCCH.

[0224] Optionally, the control information includes second indication information, and the second indication information is used to indicate beam information for transmitting the PDSCH.

[0225] Optionally, the single beam used for the single-beam transmission is a beam in a beam combination for diversity transmission.

[0226] Optionally, the second indication information is represented by a bitmap, and a length of the bitmap is the same as the number of beams in the beam combination of transmit diversity;

[0227] The bits of the bitmap correspond one-to-one to the ports corresponding to the beams in the beam combination of transmit diversity.

[0228] 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.

[0229] 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.

[0230] 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 9 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0231] As shown in Figure 12, an embodiment of the present application further provides a communication device 1200, including a processor 1201 and a memory 1202. The memory 1202 stores a program or instruction that can be run on the processor 1201. For example, when the communication device 1200 is a terminal, the program or instruction, when executed by the processor 1201, implements the various steps of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. When the communication device 1200 is a network-side device, the program or instruction, when executed by the processor m01, 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.

[0232] 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 of the method embodiment shown in FIG2 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG13 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0233] The terminal 1300 includes but is not limited to: a radio frequency unit 1301, a network module 1302, an audio output unit 1303, an input unit 1304, a sensor 1305, a display unit 1306, a user input unit 1307, an interface unit 1308, a memory 1309 and at least some of the components of the processor 1310.

[0234] Those skilled in the art will appreciate that the terminal 1300 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1310 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG13 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.

[0235] It should be understood that in an embodiment of the present application, the input unit 1304 may include a graphics processing unit (GPU) 13041 and a microphone 13042, and the graphics processor 13041 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 1306 may include a display panel 13061, and the display panel 13061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1307 includes a touch panel 13071 and at least one of the other input devices 13072. The touch panel 13071 is also called a touch screen. The touch panel 13071 may include two parts: a touch detection device and a touch controller. Other input devices 13072 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.

[0236] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1301 may transmit the data to the processor 1310 for processing. Furthermore, the RF unit 1301 may send uplink data to the network-side device. Typically, the RF unit 1301 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0237] The memory 1309 can be used to store software programs or instructions and various data. The memory 1309 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 1309 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 1309 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0238] Processor 1310 may include one or more processing units. Optionally, processor 1310 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 1310.

[0239] The processor 1310 is configured to determine configuration parameters of transmit diversity;

[0240] The radio frequency unit 1301 is configured to monitor control information sent by a network-side device based on the configuration parameters of the transmit diversity.

[0241] Optionally, the transmission diversity configuration parameter includes at least one of the following:

[0242] Transmit diversity trigger information;

[0243] Beam combining for transmit diversity;

[0244] Transmission mode;

[0245] The number of ports corresponding to the beam combination;

[0246] The port identifier corresponding to the beam combination;

[0247] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0248] precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information;

[0249] The time-frequency resource mapping information of the control information corresponding to the beam combination.

[0250] Optionally, the transmission diversity configuration parameter is determined by at least one of the following:

[0251] predefined rules, first indication information;

[0252] The first indication information is carried by at least one of the following:

[0253] Master Information Block (MIB) messages, System Information Block (SIB) messages, Radio Resource Control (RRC) messages, and Medium Access Control (MAC) control element (CE) messages.

[0254] Optionally, the processing module 110 is specifically configured to:

[0255] Determining time-frequency resource mapping information of a control channel corresponding to the beam combination based on the beam combination and the mapping rule included in the configuration parameters of the transmit diversity;

[0256] The mapping rule includes at least one of the following:

[0257] Each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control channel;

[0258] The beam combination as a whole is mapped to the time-frequency resources corresponding to the control channel.

[0259] Optionally, the configuration parameters of the transmission diversity further include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission.

[0260] Optionally, the processor 1310 is specifically configured to perform at least one of the following:

[0261] When each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, monitoring the control information sent by the network side device in a second search space in a diversity transmission manner based on the configuration parameters of the transmission diversity;

[0262] When each beam in the beam combination is mapped according to the offset information of the time-frequency resource corresponding to the control information, monitoring the control information sent by the network-side device in the first search space in a single-beam transmission manner based on the configuration parameters of each beam;

[0263] Mapping each beam in the beam combination according to the offset information of the time-frequency resource corresponding to the control information, and when the time-frequency resources of the control information corresponding to the beam combination overlap, monitoring the control information sent by the network side device in a diversity transmission manner on a second search space based on the configuration parameters of the transmission diversity;

[0264] When each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information, and the time-frequency resources of the control information corresponding to the beam combination do not overlap, the control information sent by the network side device is listened to in the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmission diversity.

[0265] Optionally, when the beam combination as a whole is mapped to the time-frequency resources corresponding to the control information, the processor 1310 is specifically configured to perform at least one of the following:

[0266] Based on the configuration parameters of the transmission diversity, monitoring the control information sent by the network side device in the second search space in a diversity transmission manner;

[0267] Based on the configuration parameters of the transmission diversity, the control information sent by the network side device is monitored in the first search space in a single-beam or single-port transmission manner.

[0268] Optionally, the control information is carried by a physical downlink control channel PDCCH, and the control information is used to schedule a physical downlink shared channel PDSCH, and the PDSCH is a PDSCH for multi-beam diversity transmission, or a PDSCH for single-beam transmission.

[0269] Optionally, the transmission mode of the PDSCH is consistent with the transmission mode of the PDCCH.

[0270] Optionally, the control information includes second indication information, and the second indication information is used to indicate beam information for transmitting the PDSCH.

[0271] Optionally, the single beam used for the single-beam transmission is a beam in a beam combination for diversity transmission.

[0272] Optionally, the second indication information is represented by a bitmap, and a length of the bitmap is the same as the number of beams in the beam combination of transmit diversity;

[0273] The bits of the bitmap correspond one-to-one to the ports corresponding to the beams in the beam combination of transmit diversity.

[0274] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment shown in Figures 2 to 8, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0275] 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 FIG9 . 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.

[0276] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 14, network-side device 1400 includes an antenna 141, a radio frequency device 142, a baseband device 143, a processor 144, and a memory 145. Antenna 141 is connected to radio frequency device 142. In the uplink direction, radio frequency device 142 receives information via antenna 141 and sends the received information to baseband device 143 for processing. In the downlink direction, baseband device 143 processes the information to be transmitted and sends it to radio frequency device 142. Radio frequency device 142 processes the received information and then sends it through antenna 141.

[0277] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 143 , which includes a baseband processor.

[0278] The baseband device 143 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 14, one of the chips is, for example, a baseband processor, which is connected to the memory 145 through a bus interface to call the program in the memory 145 to execute the network device operations shown in the above method embodiment.

[0279] The network side device may further include a network interface 146 , which is, for example, a Common Public Radio Interface (CPRI).

[0280] Specifically, the network side device 1400 of the embodiment of the present application also includes: instructions or programs stored in the memory 145 and executable on the processor 144. The processor 144 calls the instructions or programs in the memory 145 to execute the methods executed by the modules shown in FIG11 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] 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 determines configuration parameters of transmission diversity; The terminal listens for control information sent by a network-side device based on 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: Trigger information of transmission diversity; 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 the 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; Time-frequency resource mapping information of the control information corresponding to the beam combination.

3. The method according to claim 1 or 2, wherein The configuration parameters of the transmission diversity are determined by at least one of the following: Predefined rules, first indication information; The first indication information is carried by at least one of the following: Master Information Block (MIB) message, System Information Block (SIB) message, Radio Resource Control (RRC), Medium Access Control Element (MAC CE) message.

4. The method according to any one of claims 1 to 3, wherein The terminal determines the configuration parameters of transmission diversity, including: The terminal determines time-frequency resource mapping information of the control channel corresponding to the beam combination based on the beam combination included in the configuration parameters of the transmission diversity and mapping rules; The mapping rules include at least one of the following: Each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control channel; The beam combination as a whole is mapped with the time-frequency resources corresponding to the control channel.

5. The method according to any one of claims 1-4, wherein, The configuration parameters of the transmission diversity further include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission.

6. The method according to claim 4 or 5, wherein The terminal listens for control information sent by a network-side device based on the configuration parameters of the transmission diversity, including at least one of the following: In the case where each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information, the terminal listens for the control information sent by the network-side device in the second search space in a diversity transmission manner based on the configuration parameters of the transmission diversity; In the case where each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information, the terminal listens for the control information sent by the network-side device in the first search space in a single-beam transmission manner based on the configuration parameters of each beam; In the case where each beam in the beam combination is mapped according to the offset information of the time-frequency resources corresponding to the control information and the time-frequency resources of the control information corresponding to the beam combination overlap, the terminal listens for the control information sent by the network-side device in the second search space in a diversity transmission manner based on the configuration parameters of the transmission diversity; In the beam combination, each beam is mapped according to the offset information of the time-frequency resource corresponding to the control information, and when the time-frequency resources of the control information corresponding to the beam combination do not overlap, the terminal listens for the control information sent by the network-side device on the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmit diversity.

7. The method according to claim 4 or 5, wherein When the beam combination is mapped as a whole to the time-frequency resource corresponding to the control information, the terminal listens for the control information sent by the network-side device based on the configuration parameters of the transmit diversity, including at least one of the following: The terminal listens for the control information sent by the network-side device on the second search space in a diversity transmission manner based on the configuration parameters of the transmit diversity; The terminal listens for the control information sent by the network-side device on the first search space in a single-beam or single-port transmission manner based on the configuration parameters of the transmit diversity.

8. The method according to any one of claims 1-7, wherein, The control information is carried by the physical downlink control channel PDCCH, and the control information is used to schedule the physical downlink shared channel PDSCH, where the PDSCH is a PDSCH for multi-beam diversity transmission or a PDSCH for single-beam transmission.

9. The method according to claim 8, wherein, The transmission mode of the PDSCH is the same as the transmission mode of the PDCCH.

10. The method according to claim 8, wherein The control information includes a second indication information, and the second indication information is used to indicate the beam information for transmitting the PDSCH.

11. The method according to claim 8, wherein, The single beam used for the single-beam transmission is one beam in the beam combination for diversity transmission.

12. The method according to claim 10, wherein The second indication information is represented by a bitmap, and the length of the bitmap is the same as the number of beams in the beam combination for transmit diversity; The bits of the bitmap correspond one by one to the ports corresponding to the beams in the beam combination for transmit diversity.

13. A diversity transmission method, including: A network-side device sends configuration parameters of transmit diversity to a terminal; The configuration parameters of the transmit diversity are used to listen for the control information sent by the network-side device.

14. The method according to claim 13, wherein, The configuration parameters of the transmit diversity include at least one of the following: Trigger information of transmit diversity; Beam combination of transmit diversity; Transmission mode; The number of ports corresponding to the beam combination; Port identifier corresponding to the beam combination; Generation parameters of the 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; Time-frequency resource mapping information of the control information corresponding to the beam combination.

15. The method according to claim 13 or 14, wherein, The configuration parameters of the transmit diversity are determined by at least one of the following: Predefined rules, first indication information; The first indication information is carried 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.

16. The method according to any one of claims 13-15, wherein, The configuration parameters of the transmit diversity further include: a first search space for control information of single-beam or single-port transmission, and a second search space for control information of multi-beam or multi-port diversity transmission.

17. The method according to any one of claims 13 - 16, wherein, The control information is carried by a physical downlink control channel (PDCCH), and the control information is used to schedule a physical downlink shared channel (PDSCH), where the PDSCH is a PDSCH for diversity transmission or a PDSCH for single-beam transmission.

18. The method according to claim 17, wherein The transmission mode of the PDSCH is the same as that of the PDCCH.

19. The method according to claim 17, wherein, The control information includes a second indication information, and the second indication information is used to indicate the beam information for transmitting the PDSCH.

20. The method according to claim 17, wherein The single beam used for the single-beam transmission is one beam in the beam combination for diversity transmission.

21. The method according to claim 19, wherein, The second indication information is represented by a bitmap, and the length of the bitmap is the same as the number of beams in the beam combination of the transmit diversity. The bits of the bitmap correspond one by one to the ports corresponding to the beams in the beam combination of the transmit diversity.

22. A diversity transmission device, comprising: a processing module, configured to determine configuration parameters of transmit diversity; The processing module is further configured to monitor control information sent by a network-side device based on the configuration parameters of the transmit diversity.

23. A diversity transmission device, comprising: a sending module, configured to send configuration parameters of transmit diversity to a terminal; The configuration parameters of the transmit diversity are used to monitor control information sent by a network-side device.

24. 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 12 are implemented.

25. 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 13 to 21 are implemented.

26. 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 diversity transmission method according to any one of claims 1 to 12 is implemented, or the steps of the diversity transmission method according to any one of claims 13 to 21 are implemented.

Images