Transmission method, terminal, and network-side device

Abstract

The present application belongs to the technical field of communications. Disclosed are a transmission method, a terminal, and a network-side device. The transmission method in the embodiments of the present application comprises: a terminal sending, on the basis of a measurement result of a first signal, a first message to a network-side device, wherein the first message comprises reporting information of a first transmission mode; and the terminal receiving, in the first transmission mode, a second message sent by the network-side device.

Description

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 202311843665.4 and invention name “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 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 send one or more synchronization signal beams. Ensuring that terminals and network-side equipment have a consistent understanding of the downlink signal transmission mode is a challenge that needs to be addressed. Summary of the Invention

[0006] The embodiments of the present application provide a transmission method, a terminal, and a network-side device, which can ensure that the terminal and the network-side device have a consistent understanding of the transmission mode of the downlink signal.

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

[0008] The terminal sends a first message to the network side device based on the measurement result of the first signal; the first message includes reporting information of the first transmission mode;

[0009] The terminal receives a second message sent by the network side device in the first transmission mode.

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

[0011] The network side device receives a first message sent by the terminal, where the first message is sent by the terminal based on a measurement result of the first signal; the first message includes reporting information of the first transmission mode;

[0012] The network-side device sends a second message to the terminal.

[0013] In a third aspect, a transmission device is provided, comprising:

[0014] A sending module, configured to send a first message to a network-side device based on a measurement result of the first signal; the first message including reporting information of the first transmission mode;

[0015] A receiving module is used to receive a second message sent by the network side device in the first transmission mode.

[0016] In a fourth aspect, a transmission device is provided, comprising:

[0017] a receiving module, configured to receive a first message sent by a terminal, where the first message is sent by the terminal based on a measurement result of a first signal; the first message includes reporting information of a first transmission mode;

[0018] A sending module is used to send a second message to the terminal.

[0019] 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.

[0020] In the sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to send a first message to a network side device based on the measurement result of the first signal; the first message includes reporting information of a first transmission mode; and a second message sent by the network side device is received in the first transmission mode.

[0021] 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.

[0022] In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to receive a first message sent by a terminal, the first message is sent by the terminal based on the measurement results of the first signal; the first message includes reporting information of the first transmission mode; and a second message is sent to the terminal.

[0023] 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.

[0024] In the tenth aspect, a wireless communication system is provided, including: 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.

[0025] 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.

[0026] 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 transmission method as described in the first aspect or the second aspect.

[0027] In an embodiment of the present application, the terminal sends a first message to the network side device based on the measurement result of the first signal; the first message includes reporting information of the first transmission mode; so that the network side device can send a signal to the terminal based on the first transmission mode reported by the terminal, and the terminal receives the second message sent by the network side device in the first transmission mode, thereby ensuring that the terminal and the network side device maintain a consistent understanding of the transmission mode of the downlink signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of the present application;

[0029] FIG2 is a flow chart of a transmission method according to an embodiment of the present invention;

[0030] FIG3 is a second flow chart of the transmission method provided in an embodiment of the present application;

[0031] FIG4 is a schematic diagram of a structure of a transmission device according to an embodiment of the present application;

[0032] FIG5 is a second structural diagram of a transmission device provided in an embodiment of the present application;

[0033] FIG6 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0034] FIG7 is a schematic structural diagram of a terminal according to an embodiment of the present application;

[0035] FIG8 is a schematic structural diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] First, the technical terms and application scenarios involved in the embodiments of this application are introduced:

[0043] 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.

[0044] 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.

[0045] 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 (Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) Block, SSB) beams required will continue to increase, and the corresponding broadcast PDCCH and PDSCH resources will also continue to increase.

[0046] 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.

[0047] A cell-free network may contain a large number of TRP nodes, each of which may participate in the transmission of synchronization signals to ensure that terminals within the coverage area can access the cell. Beam-based synchronization signal transmission and system information transmission can ensure that terminals can discover cells, but beam-based system information transmission will lead to an increase in the time and frequency resources occupied by system information, especially when the number of synchronization signal beams in the cell-free network continues to increase. In a cell-free network, in order to achieve collaborative transmission between TRP nodes, the coverage areas of each TRP node need to overlap to a certain extent. This also means that terminals in the overlapping coverage area can receive synchronization signals sent by multiple TRP nodes, thereby using transmit diversity to receive cell-level PDCCH and PDSCH from multiple TRP nodes. Connected terminals can use multiple TRPs to achieve coherent or multi-stream transmission based on channel measurement feedback. However, in the non-connected state, due to the lack of prior channel measurement information, the NR system only introduces a single-beam / single-port transmission mode, that is, the terminal is only associated with one synchronization signal beam corresponding to the TRP or TRP cluster, and other synchronization channel beams are regarded as interference signals, which increases the implementation complexity of the terminal and affects the communication quality and mobility of the terminal.

[0048] 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.

[0049] NR supports two types of random access procedures: 4-step RACH for Msg1 and 2-step RACH for MsgA. Both types of RA procedures support contention-based random access (CBRA) and contention-free random access (CFRA). The 2-step RACH procedure is generally used in areas with good coverage to shorten terminal access time. In areas with poor signal coverage, terminals should use the 4-step RACH procedure to access the cell.

[0050] In 4-step RACH, the terminal first sends Msg1, which contains a preamble, to the network. After sending the preamble, the terminal monitors the PDCCH within the Random Access Response (RAR) window and uses the fallback Downlink Control Information (DCI) format, DCI format 1_0, to receive the PDCCH-scheduled Random Access Response (RAR) scrambled with the Random Access Radio Network Temporary Identifier (RA-RNTI). If the preamble index in the RAR matches the preamble index sent by the terminal, the RAR is considered successfully received. The terminal can then stop monitoring the RAR and send Msg3 according to the uplink UL grant carried in the RAR. Msg3 is transmitted on the uplink shared channel (UL-SCH) and uses hybrid automatic repeat request (HARQ). The PDCCH is scrambled with the temporary cell RNTI (TC-RNTI) indicated by the RAR, and the fallback DCI format (DCI format 0_0) is used to schedule the retransmission of Msg3. Msg3 contains a unique terminal flag. This flag will be used for conflict resolution in step 4. After receiving Msg3, the network side device will schedule Msg4 with the PDCCH scrambled by TC-RNTI. When the terminal successfully decodes the terminal contention resolution identity (UE Contention Resolution Identity) medium access control element (MAC CE) contained in Msg4 and matches the UE Contention Resolution Identity sent by Msg3, the terminal will consider the random access successful and set its own cell RNTI (Cell RNTI, C-RNTI) to TC-RNTI, completing the 4-step random access.

[0051] In cell-edge areas or areas with limited coverage, a terminal's uplink signal coverage is typically worse than its downlink signal coverage. Specifically, the coverage of Msg1 and Msg3 is worse than that of Msg2 and Msg4. Furthermore, the gap in coverage between uplink and downlink channels is even more pronounced in the high-frequency band FR2. To improve uplink signal coverage, repeated uplink signal transmission is being considered.

[0052] In future coverage-limited scenarios, since SSB beams are usually fixed beams, there may be areas of beam overlap between SSB beams. In this case, the signal quality of multiple SSBs detected by the terminal (such as SS-Reference Signal Received Power (RSRP)) may be similar. Selecting one of the SSB beams for random access means giving up other possible SSB beams. If multiple SSBs can be selected to send Msg1, the probability of the base station successfully detecting Msg1 can be increased. In addition, since the SS-RSRP measurement is determined only based on a single measurement result of the SSB during the random access phase, the SS-RSRP measurement result may have measurement deviation. Therefore, selecting multiple SSBs to send Msg1 can also reduce the impact of SSB measurement deviation on SSB selection.

[0053] The transmission method provided in the embodiments of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0054] Referring to FIG. 2 , an embodiment of the present application provides a transmission method. The execution subject of this embodiment is a terminal. The method includes:

[0055] Step 101: The terminal sends a first message to a network device based on a measurement result of a first signal; the first message includes reporting information of a first transmission mode;

[0056] Optionally, the first transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, and multiplexing.

[0057] Specifically, the terminal sends a first message to the network side device based on the measurement result. For example, the first message can be Msg1 or Msg3 or MsgA, and reports the transmission mode to the network side device through the first message, such as single beam transmission or multi-beam diversity transmission.

[0058] In a Cell-free or multi-TRP network, the terminal measures a first signal (synchronization signal or CSI-RS or other signal) to determine whether diversity transmission can be used to transmit a downlink signal;

[0059] For example, for contention-based random access, the first signal may be a synchronization signal;

[0060] For non-contention-based random access, the first signal may be a synchronization signal or a CSI-RS.

[0061] Step 102: The terminal receives a second message sent by the network-side device in the first transmission mode.

[0062] Optionally, the second message may be Msg2, Msg4, or MsgB in random access, or a downlink message after random access.

[0063] The terminal reports a request for the first transmission mode based on the measurement result, and then receives the second message in the first transmission mode.

[0064] In the method of this embodiment, the terminal sends a first message to the network side device based on the measurement result of the first signal; the first message includes reporting information of the first transmission mode; the terminal receives the second message sent by the network side device in the first transmission mode, thereby realizing the solution of using uplink message reporting and requesting transmission mode.

[0065] Optionally, the first message carries a random access opportunity (RO), a RO combination, a preamble, or a preamble combination corresponding to Msg1 in the random access procedure;

[0066] The first message is carried in the uplink data of Msg3 in the random access process;

[0067] The first message is carried in the preamble, preamble combination, RO, RO combination or uplink data MsgAPUSCH corresponding to MsgA in the random access process.

[0068] Optionally, the method further includes:

[0069] The terminal obtains configuration parameters of the first signal;

[0070] Measuring, by the terminal, the first signal based on the configuration parameters of the first signal;

[0071] The configuration parameters of the first signal include at least one of the following:

[0072] Information of the candidate first signal;

[0073] Candidate beam combinations for the first transmission mode.

[0074] Specifically, the network side device configures multiple candidate beams / signals to be measured (such as SSB or CSI-RS) for the terminal, or candidate beam / signal combinations, where the candidate beam combination can be a candidate set of beam combinations supporting multi-beam diversity transmission, or a candidate set of beam combinations participating in multi-beam diversity transmission.

[0075] The terminal can measure the candidate signals or candidate beam combinations to be measured and determine whether to request multi-beam diversity transmission based on the measurement results. If multi-beam diversity transmission is requested, the terminal can send a first message on the resources corresponding to the multi-beam reference signal. After successfully receiving the preamble, the network-side device carries confirmation information of the diversity transmission request in a subsequent downlink message.

[0076] Optionally, the terminal determines the first transmission mode based on the measurement result;

[0077] In a case where it is determined to use the first transmission mode, the terminal sends the first message to the network-side device.

[0078] Exemplarily, the terminal measures the signal quality of the reference signal (for example, Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), (Signal-to-Interference-plus-Noise Ratio, SINR), etc.); and determines whether to apply for multi-beam diversity transmission based on the signal quality measurement results. For example, the network-side device configures two reference signals for the terminal, and the terminal determines whether the beams corresponding to the two reference signals are suitable for transmission diversity. The terminal measures the signal quality of the two reference signals to determine whether it is suitable for transmission diversity, for example, the difference in signal quality between the two reference signals is less than a threshold value. For another example, the network-side device configures multiple reference signals for the terminal, and the terminal determines the transmission mode (single-beam transmission or multi-beam diversity transmission) based on the measurement results of the multiple reference signals and determines the corresponding beam / beam combination (that is, the number / identification of the reference signal). For another example, the network side device configures multiple reference signals for the terminal, and the terminal determines whether there is a beam in the multiple reference signals that can be combined with the default beam (for example, the beam on which the terminal currently monitors PDCCH) for diversity transmission based on the measurement results of the multiple reference signals.

[0079] Possible transmission mode requests include: switching from single-beam transmission to multi-beam diversity transmission, or switching from multi-beam diversity transmission to single-beam transmission, or switching from the previous multi-beam diversity transmission area to the next multi-beam diversity transmission area (updating one or more beams, or updating all beams).

[0080] The triggering conditions for transmission mode switching include, for example:

[0081] Switching from single-beam transmission to multi-beam diversity transmission: The signal quality of multiple reference signals is higher than the first threshold; the signal quality of the reference signal corresponding to a certain transmission diversity beam combination is higher than the signal quality of the reference signal corresponding to the single-beam transmission currently in use / activated;

[0082] Switching from multi-beam diversity transmission to single-beam transmission: The signal quality of a reference signal (not a beam used in multi-beam diversity transmission) is higher than the signal quality of at least one reference signal corresponding to multi-beam diversity transmission.

[0083] Multi-beam diversity transmission area switching: The signal quality of the reference signal corresponding to a certain transmission diversity beam combination is higher than the signal quality of the reference signal corresponding to the multi-beam diversity transmission being used / activated.

[0084] The signal quality comparison method for the reference signals corresponding to the beam combination is as follows: the signal quality of each reference signal in the reference signals corresponding to the beam combination is mathematically processed to represent the signal quality of the reference signals corresponding to the beam combination. For example, the minimum, maximum, average, or weighted sum of the signal qualities of the reference signals corresponding to the beam combination can be used.

[0085] Optionally, the terminal sends the first message to the network-side device based on configuration parameters of the first message; the configuration parameters of the first message include at least one of the following:

[0086] Random access preamble information;

[0087] Random access opportunity RO resource information.

[0088] Specifically, the network side device may configure a preamble corresponding to random access and a random access opportunity RO resource for the terminal to transmit the first message.

[0089] Optionally, the configuration parameters of the first message may further include at least one of the following:

[0090] Transmission mode;

[0091] beam combining for said diversity transmission;

[0092] The number of ports corresponding to the beam combination;

[0093] The port identifier corresponding to the beam combination;

[0094] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0095] precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information;

[0096] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, and multiplexing.

[0097] Specifically, the terminal may also perform multi-beam diversity transmission based on the configuration parameters of the first message.

[0098] Exemplarily, the terminal uses the dedicated preamble code preamble / RO resources corresponding to multi-beam diversity transmission to send the first message. That is, the preamble / RO resources are associated with the SSB of diversity transmission. For example, the system information configures SSB#0 and SSB#1 as the beam combination for diversity transmission, and configures preamble#i~i+L (i and L are positive integers) in the resources corresponding to SSB#0 as the dedicated resource set for diversity transmission. The terminal selects the preamble in the SSB#0 dedicated resource set, such as preamble#i+1, to send the first message, and then selects the preamble in the SSB#1 dedicated resource set to send Msg1, notifying the network side device that it can use diversity transmission based on SSB#0 and SSB#1 for downlink signal transmission. It can be understood that for the terminal with diversity transmission, the SSB associated with the first message is one of the SSBs of multi-beam diversity transmission; the terminal sends multiple first messages, which are respectively associated with multiple SSBs of multi-beam diversity transmission.

[0099] Exemplarily, the system information configures SSB#0 and SSB#1 as a beam combination for diversity transmission, and configures preamble#k~k+M (k and M are positive integers) in the resources of the first message as a dedicated resource set for diversity transmission based on SSB#0 and SSB#1. The terminal selects a preamble in the dedicated resource set, such as preamble#k+1, to send Msg1, notifying the network-side device that it can use diversity transmission based on SSB#0 and SSB#1 for downlink signal transmission. It can be understood that for terminals with diversity transmission, the first message is associated with multiple SSBs of multi-beam diversity transmission.

[0100] Optionally, the first message also includes at least one of the following: the measurement result, and beam combination of transmission diversity.

[0101] Specifically, when sending the first message, the terminal can carry at least one of the measurement results and the beam combination of diversity transmission, and the network side device can transmit the downlink signal based on the information reported by the terminal.

[0102] Optionally, after sending the first message to the network side device, the method further includes:

[0103] The terminal receives a confirmation message sent by the network side device.

[0104] Optionally, the confirmation message is sent through a random access message Msg2, Msg4 or MsgB or a downlink message after a random access procedure.

[0105] Optionally, the confirmation message includes: third indication information, and the third indication information is used to instruct the terminal to report at least one of the measurement results and the beam combination of diversity transmission, or to indicate the transmission mode of the second message.

[0106] Specifically, after receiving the first message, the network side device may send a confirmation message to the terminal. The confirmation message may be used to indicate whether to agree or disagree with the terminal's transmission mode request, such as agreeing or disagreeing with the diversity transmission request.

[0107] The third indication information is used to instruct the terminal to report at least one of the measurement result and the beam combination for diversity transmission. The terminal can carry at least one of the measurement result and the beam combination for diversity transmission in a subsequent uplink message.

[0108] The third indication information may also be used to indicate a transmission mode of the second message, and the terminal may receive the second message based on the transmission mode indicated by the third indication information.

[0109] For example, the RAR of the first message carries 1 bit to instruct the terminal to report the SSB measurement result, or the beam combination information of the multi-beam diversity transmission.

[0110] In the above implementation, the network side device can notify the terminal whether it agrees with the first transmission mode by sending confirmation information. The terminal can receive the second message based on the confirmation information sent by the network side device. The implementation complexity of the terminal is relatively low.

[0111] Optionally, the terminal receives the second message using the first transmission mode based on a predefined rule or a configuration parameter of the first transmission mode.

[0112] Specifically, the predefined rule is, for example, to use the first transmission mode to receive the second message after receiving the confirmation message.

[0113] The configuration parameters of the first transmission mode may be pre-configured, that is, configured before sending the first message, or configured after sending the first message.

[0114] Optionally, the configuration parameters of the first transmission mode include at least one of the following:

[0115] trigger information of the first transmission mode;

[0116] beam combining of the first transmission mode;

[0117] The number of ports corresponding to the beam combination;

[0118] The port identifier corresponding to the beam combination;

[0119] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0120] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0121] Optionally, the network-side device may configure semi-static diversity transmission or dynamically scheduled diversity transmission for the terminal in the Msg2 or Msg4 phase.

[0122] Optionally, the configuration parameters of the first transmission mode are determined by at least one of the following:

[0123] predefined rules, first indication information;

[0124] 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), a medium access control unit MAC CE message and a downlink control information DCI message.

[0125] 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.

[0126] Alternatively, the configuration parameters of the first transmission mode are indicated by an MIB message, for example, the MIB message indicates whether the synchronization signal beam associated with the MIB uses transmission diversity. Optionally, the MIB message may indicate that the downlink signal is transmitted using the transmission diversity mode before entering the connected state to configure other transmission modes.

[0127] Alternatively, the configuration parameters of the first transmission mode 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 scheduled PDSCH associated with the beam combination of the synchronization signal beam use transmission diversity.

[0128] Alternatively, the configuration parameters of the first transmission mode are indicated through high-layer signaling (such as RRC messages and / or MAC CE messages), for example, indicating the beam combination information of the synchronization signal or CSI-RS beam, and receiving PDCCH or PDSCH according to the transmission diversity of the beam combination.

[0129] Alternatively, when dynamically scheduling the PDSCH for transmit diversity, the DCI message carries relevant configuration parameters.

[0130] It is understood that the aforementioned methods for obtaining configuration parameters can be combined to determine a complete set of configuration parameters for the first transmission mode. For example, the SIB message configures several candidate beam combinations for transmit diversity. When dynamically scheduling PDSCH transmit diversity, the DCI information indicates one of the candidate beam combinations to be used for PDSCH transmit diversity.

[0131] Optionally, the trigger information may be used to indicate triggering of the first transmission mode, such as transmit diversity, or enabling / disabling the first transmission mode, or may be used to indicate switching of the transmission mode.

[0132] In the above implementation, the configuration parameters of the transmission diversity can be obtained in a variety of ways, which has great flexibility and low implementation complexity.

[0133] 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.

[0134] 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;

[0135] 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.

[0136] The beam order may be arranged in sequence according to the beam number, for example, beam 1 corresponds to port number 1001, and beam 2 corresponds to 1002. For example, the corresponding transmit diversity port number is determined according to the number of the reference signal corresponding to the transmit diversity beam.

[0137] The inclusion relationship, for example, refers to the inclusion relationship between the upper-level synchronization signal beam and the lower-level synchronization signal beam in the Cell free network. For example, the first-level synchronization signal beam 1, the second-level synchronization signal beams 1-1 and 1-2 perform transmission diversity, the first-level synchronization signal beam 1 is the beam of the macro station node, and the second-level synchronization signal beams 1-1 and 1-2 are the beams of the small station nodes under the coverage of the macro station node.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] Optionally, the configuration parameters of the first message or the first signal may also be determined by at least one of the following:

[0142] predefined rules, first indication information;

[0143] 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, a medium access control element MAC CE message and a downlink control information DCI message.

[0144] Optionally, the terminal receiving, in the first transmission mode, the second message sent by the network side device includes:

[0145] The terminal monitors a physical downlink control channel PDCCH and obtains second indication information;

[0146] The terminal receives the second message based on the second indication information.

[0147] Optionally, the second indication information is used to instruct the terminal to receive the second message according to the first transmission mode; or,

[0148] The second indication information is used to indicate that the second message is received according to the same transmission mode as that of the second indication information.

[0149] Optionally, the second indication information is carried through DCI.

[0150] Optionally, the time-frequency resources and beam used to monitor the PDCCH are determined based on the resources used by the first message.

[0151] Specifically, the terminal monitors the PDCCH and receives the second indication information. Optionally, the time-frequency resources (CORESET) and the monitoring beam (QCL assumption) for monitoring the PDCCH are determined based on the resources used by the first message. For example, if the terminal uses the preamble / RO resources of the 4-step RACH to send the first message, the terminal uses the time-frequency resources (for example, DCI search space) to monitor the DCI. Optionally, the terminal sends the first message on the resources associated with multiple SSBs, and the terminal monitors the DCI on the PDCCH time-frequency resources corresponding to the multiple SSBs respectively. Further, optionally, the terminal monitors the DCI on the PDCCH time-frequency resources corresponding to the multiple SSBs in a diversity transmission mode.

[0152] Optionally, the terminal receives the second message in a diversity transmission mode according to a predefined rule, an indication of a higher-layer signaling, or an explicit indication of the DCI. For example, the terminal sends the first message using a dedicated preamble / RO resource for diversity transmission, and by default receives the second message in a diversity transmission mode; or, a 1-bit field in the DCI instructs the terminal to receive the second message in a diversity transmission mode; or, the terminal receives the second message scheduled by the DCI in the same transmission mode as the DCI; or, a corresponding field in the MAC CE signaling instructs the terminal to receive the second message in a diversity transmission mode after a specific time length, or after a specific time length after the feedback of an ACK message, where the specific time length may be predefined by the protocol or explicitly indicated.

[0153] For example, the second message of the diversity transmission includes signals of multiple synchronization signal (SS) beams, and the RAR / sub packet data unit (sub PDU) in the second message includes a response message to the first message associated with the multiple SS beams. Optionally, the RAR carries a 1-bit instruction to instruct the terminal to report SSB measurement results or beam information for multi-beam diversity transmission.

[0154] When the first message is Msg1, the method further includes:

[0155] The terminal sends a third message to the network side device;

[0156] The terminal monitors the PDCCH and obtains fourth indication information;

[0157] The terminal receives a fourth message based on the fourth indication information;

[0158] The third message includes: at least one of the measurement result and the beam combination of diversity transmission;

[0159] The fourth message is used to indicate a transmission mode of a downlink signal after the random access procedure.

[0160] Optionally, the synchronization signal beam associated with the third message or the first message is one of the beams of diversity transmission, and the third message carries information of other beams of diversity transmission.

[0161] It can be understood that the SS beam associated with the third message (such as Msg3) or the first message (such as Msg1) is one of the beams of multi-beam diversity transmission, and Msg3 only carries information of other beams of multi-beam diversity transmission (for example, SS identification / number, SS signal quality).

[0162] Specifically, after receiving the confirmation message of diversity transmission (e.g., Msg2), the terminal detects the DCI in the diversity transmission mode, or detects the DCI corresponding to the fourth message (e.g., Msg4) in the same transmission mode as the DCI corresponding to Msg2, or receives the DCI corresponding to Msg4 in single-beam transmission by default. Optionally, the DCI corresponding to the Msg4 explicitly indicates the transmission mode of Msg4PDSCH, or receives Msg4PDSCH in the same transmission mode as the DCI. Optionally, Msg4 indicates the transmission mode of the downlink signal after the random access process (multi-beam diversity transmission or single-beam transmission), and the downlink signal includes PDCCH and / or PDSCH.

[0163] Optionally, in the above embodiment, when the synchronization signal beam associated with the third message or the first message is one of the beams of diversity transmission, the third message only carries information of other beams of diversity transmission, which can reduce the signaling overhead of configuring transmission diversity parameters.

[0164] Optionally, before sending the first message to the network side device, the method further includes:

[0165] The terminal determines whether a use condition of two-step random access is met;

[0166] When it is determined that the use condition of the two-step random access is met, a first message is sent to the network side device.

[0167] Specifically, two-step random access is typically used in scenarios with good network coverage. In this scenario, the terminal may detect multiple SSB signals with good quality. Diversity transmission is requested through explicit configuration by the network (e.g., SIB message indication during initial access, RRC message indication in CFRA scenarios) or by the terminal based on SSB measurement results to determine the beam combination for diversity transmission.

[0168] Exemplarily, after the terminal obtains downlink synchronization and system information through the cell search process:

[0169] 1. When the SSB signal quality meets the conditions for two-step random access (for example, the RSRP representing the downlink path loss reference is greater than a predefined threshold), the terminal measures the signal quality of each SSB beam (for example, SS-RSRP, RSRQ, SINR, etc.). For non-contention 2-step RA, the network side equipment configures multiple reference signals to be measured (SSB or CSI-RS); the terminal measures these reference signals.

[0170] 2. The terminal determines the transmission mode (single beam transmission, multi-beam diversity transmission) of the downlink signal after MsgB or random access based on the measurement results of each SSB. For example, the terminal selects two or more SSBs from the SSBs that meet the conditions based on the SSB measurement results, reports them to the network-side device, and requests downlink diversity transmission based on the reported multiple SSBs. The conditions that are met may be: for example, the two SSBs with the best signal quality; for another example, the signal quality of the two SSBs is higher than the first threshold and the difference in the signal quality of the two SSBs is less than the second threshold; for another example, for the SSB beam combination pre-configured by SIB or RRC, the signal quality of the two SSBs in the beam combination is higher than the third threshold or the sum of the signal qualities of the two SSBs in the beam combination is higher than the fourth threshold. The first threshold, the second threshold, the third threshold, and the fourth threshold may be predefined threshold values ​​or threshold values ​​configured by the network. The above is only illustrated by two SSBs. In other embodiments, it may be more than two SSBs, and the embodiments of the present application are not limited to this.

[0171] 3. The terminal sends MsgA, and the measurement results of the SSB or the reference signal to be measured (for example, the measurement results of all SSBs or the reference signal to be measured, or the best several measurement results) are carried in the MsgA physical uplink shared channel (PUSCH), and / or the reporting information of the transmission mode is carried in MsgAPUSCH (such as requesting single-beam transmission or multi-beam diversity transmission). If the terminal requests multi-beam diversity transmission, MsgAPUSCH carries the selection result of the multi-beam (for example, the SSB number). Optionally, the terminal can assume that the SSB or reference signal associated with MsgA is one of the beams of multi-beam diversity transmission, and MsgA PUSCH only needs to indicate the numbers of other beams.

[0172] 4. After the network-side device successfully receives MsgA, it sends MsgB; MsgB PDCCH or PDSCH carries confirmation information of the transmission mode request. It can be understood that the confirmation information can be a request to agree to the terminal's multi-beam diversity transmission; or it can disagree to the request for multi-beam diversity transmission, and the terminal continues to use the default transmission mode / single-beam transmission downlink signal. For example, the terminal sends two preambles to request multi-beam diversity transmission, and the network-side device only detects one preamble and believes that the terminal requests single-beam transmission. Optionally, the network-side device agrees to the multi-beam diversity transmission request, and according to predefined rules or network configuration or terminal request, the transmission combination of the downlink signal includes: both PDCCH and PDSCH use diversity transmission; PDCCH single-beam transmission, PDSCH diversity transmission; PDCCH diversity transmission, PDSCH single-beam transmission.

[0173] Optionally, MsgAPUSCH may also carry information for applying for multiplexing. That is, the application information of MsgAPUSCH includes information for applying for a transmission mode, and the transmission mode may be transmission diversity, multiplexing, or single-stream transmission.

[0174] In summary, the method of the embodiment of the present application provides a method for diversity transmission of downlink signals for the random access process in a distributed / cell-free networking scenario, and implements a scheme for reporting and requesting transmission diversity using uplink messages. This improves the transmission success rate of downlink signals in a non-connected state, provides a solution for rapidly implementing diversity transmission, and reduces interference between multiple TRPs in a non-connected state.

[0175] Referring to FIG3 , an embodiment of the present application provides a transmission method. The embodiment is performed by a network-side device. The method includes:

[0176] Step 201: A network-side device receives a first message sent by a terminal, where the first message is sent by the terminal based on a measurement result of a first signal; the first message includes reporting information of a first transmission mode;

[0177] Step 202: The network-side device sends a second message to the terminal.

[0178] Optionally, the method further includes:

[0179] The network side device sends the configuration parameters of the first signal to the terminal;

[0180] The configuration parameters of the first signal include at least one of the following:

[0181] Information of the candidate first signal;

[0182] Candidate beam combinations for the first transmission mode.

[0183] Optionally, the method further includes:

[0184] The network side device sends the configuration parameters of the first message to the terminal;

[0185] The configuration parameters of the first message include at least one of the following:

[0186] Random access preamble information;

[0187] Random access opportunity RO resource information.

[0188] Optionally, the method further includes:

[0189] The network side device sends the configuration parameters of the first transmission mode to the terminal;

[0190] The configuration parameters of the first transmission mode include at least one of the following:

[0191] trigger information of the first transmission mode;

[0192] beam combining of the first transmission mode;

[0193] The number of ports corresponding to the beam combination;

[0194] The port identifier corresponding to the beam combination;

[0195] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0196] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0197] Optionally, the configuration parameter of the first transmission mode is carried by at least one of the following:

[0198] Master Information Block (MIB) message, System Information Block (SIB) message, Radio Resource Control (RRC), Medium Access Control Unit (MAC) message, Downlink Control Information (DCI) message.

[0199] Optionally, the first message carries the RO, RO combination, preamble or preamble combination corresponding to Msg1 in the random access procedure;

[0200] The first message is carried in the uplink data of Msg3 in the random access process;

[0201] The first message is carried in the preamble, preamble combination, RO, RO combination or uplink data corresponding to MsgA in the random access process.

[0202] Optionally, the first message also includes at least one of the following: the measurement result, and beam combination of transmission diversity.

[0203] Optionally, the method further includes:

[0204] The network side device sends a confirmation message to the terminal, where the confirmation message is used to indicate whether to agree or disagree with the first transmission mode.

[0205] Optionally, the confirmation message is sent through a random access message Msg2, Msg4 or MsgB or a downlink message after a random access procedure.

[0206] Optionally, the confirmation message includes: third indication information, and the third indication information is used to instruct the terminal to report at least one of the measurement results and the beam combination of diversity transmission, or to indicate the transmission mode of the second message.

[0207] Optionally, the method further includes:

[0208] The network side device sends a physical downlink control channel PDCCH to the terminal, where the PDCCH carries second indication information;

[0209] The second indication information is used to instruct the terminal to receive the second message according to the first transmission mode; or,

[0210] The second indication information is used to indicate that the second message is received according to the same transmission mode as that of the second indication information.

[0211] Optionally, the first transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, and multiplexing.

[0212] 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.

[0213] The transmission method provided in the embodiment of the present application can be executed by a transmission device. In the embodiment of the present application, the transmission device provided in the embodiment of the present application is described by taking the transmission method executed by the transmission device as an example.

[0214] FIG4 is a schematic diagram of a transmission device according to an embodiment of the present application. As shown in FIG4 , the transmission device according to the embodiment includes:

[0215] The sending module 110 is configured to send a first message to the network side device based on the measurement result of the first signal; the first message includes reporting information of the first transmission mode;

[0216] The receiving module 120 is configured to receive a second message sent by the network-side device in the first transmission mode.

[0217] Optionally, the sending module 110 is specifically configured to:

[0218] determining the first transmission mode based on the measurement result;

[0219] In a case where it is determined to use the first transmission mode, the first message is sent to the network side device.

[0220] Optionally, the device further comprises:

[0221] A processing module, configured to obtain configuration parameters of the first signal;

[0222] measuring the first signal based on configuration parameters of the first signal;

[0223] The configuration parameters of the first signal include at least one of the following:

[0224] Information of the candidate first signal;

[0225] Candidate beam combinations for the first transmission mode.

[0226] Optionally, the sending module 110 is specifically configured to:

[0227] Send the first message to the network-side device based on the configuration parameters of the first message; the configuration parameters of the first message include at least one of the following:

[0228] Random access preamble information;

[0229] Random access opportunity RO resource information.

[0230] Optionally, the first message carries the RO, RO combination, preamble or preamble combination corresponding to Msg1 in the random access procedure;

[0231] The first message is carried in the uplink data of Msg3 in the random access process;

[0232] The first message is carried in the preamble, preamble combination, RO, RO combination or uplink data corresponding to MsgA in the random access process.

[0233] Optionally, the first message also includes at least one of the following: the measurement result, and beam combination of transmission diversity.

[0234] Optionally, the receiving module 120 is further configured to:

[0235] After sending the first message to the network side device, a confirmation message sent by the network side device is received, where the confirmation message is used to indicate whether to agree or disagree with the first transmission mode.

[0236] Optionally, the confirmation message is sent through a random access message Msg2, Msg4 or MsgB or a downlink message after a random access procedure.

[0237] Optionally, the confirmation message includes: third indication information, and the third indication information is used to instruct the terminal to report at least one of the measurement results and the beam combination of diversity transmission, or to indicate the transmission mode of the second message.

[0238] Optionally, the receiving module 120 is specifically configured to:

[0239] The second message is received using the first transmission mode based on a predefined rule or a configuration parameter of the first transmission mode.

[0240] Optionally, the configuration parameters of the first transmission mode include at least one of the following:

[0241] trigger information of the first transmission mode;

[0242] beam combining of the first transmission mode;

[0243] The number of ports corresponding to the beam combination;

[0244] The port identifier corresponding to the beam combination;

[0245] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0246] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0247] Optionally, the configuration parameters of the first transmission mode are determined by at least one of the following:

[0248] predefined rules, first indication information;

[0249] The first indication information is carried by at least one of the following:

[0250] Master Information Block (MIB) message, System Information Block (SIB) message, Radio Resource Control (RRC), Medium Access Control Unit (MAC) message, Downlink Control Information (DCI) message.

[0251] Optionally, the receiving module 120 is specifically configured to:

[0252] Monitoring a physical downlink control channel (PDCCH) and acquiring second indication information;

[0253] Based on the second indication information, the second message is received.

[0254] Optionally, the second indication information is used to instruct the terminal to receive the second message according to the first transmission mode; or,

[0255] The second indication information is used to indicate that the second message is received according to the same transmission mode as that of the second indication information.

[0256] Optionally, the time-frequency resources and beam used to monitor the PDCCH are determined based on the resources used by the first message.

[0257] Optionally, the first transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, and multiplexing.

[0258] 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.

[0259] FIG5 is a second structural diagram of a transmission device provided in an embodiment of the present application. As shown in FIG5 , the transmission device provided in this embodiment includes:

[0260] The receiving module 210 is configured to receive a first message sent by a terminal, where the first message is sent by the terminal based on a measurement result of a first signal; the first message includes reporting information of a first transmission mode;

[0261] The sending module 220 is configured to send a second message to the terminal.

[0262] Optionally, the sending module 220 is further configured to:

[0263] Sending configuration parameters of the first signal to the terminal;

[0264] The configuration parameters of the first signal include at least one of the following:

[0265] Information of the candidate first signal;

[0266] Candidate beam combinations for the first transmission mode.

[0267] Optionally, the sending module 220 is further configured to:

[0268] Sending configuration parameters of the first message to the terminal;

[0269] The configuration parameters of the first message include at least one of the following:

[0270] Random access preamble information;

[0271] Random access opportunity RO resource information.

[0272] Optionally, the sending module 220 is further configured to:

[0273] Sending configuration parameters of the first transmission mode to the terminal;

[0274] The configuration parameters of the first transmission mode include at least one of the following:

[0275] trigger information of the first transmission mode;

[0276] beam combining of the first transmission mode;

[0277] The number of ports corresponding to the beam combination;

[0278] The port identifier corresponding to the beam combination;

[0279] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0280] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0281] Optionally, the configuration parameter of the first transmission mode is carried by at least one of the following:

[0282] Master Information Block (MIB) message, System Information Block (SIB) message, Radio Resource Control (RRC), Medium Access Control Unit (MAC) message, Downlink Control Information (DCI) message.

[0283] Optionally, the first message carries the RO, RO combination, preamble or preamble combination corresponding to Msg1 in the random access procedure;

[0284] The first message is carried in the uplink data of Msg3 in the random access process;

[0285] The first message is carried in the preamble, preamble combination, RO, RO combination or uplink data corresponding to MsgA in the random access process.

[0286] Optionally, the first message also includes at least one of the following: the measurement result, and beam combination of transmission diversity.

[0287] Optionally, the sending module 220 is further configured to:

[0288] A confirmation message is sent to the terminal, where the confirmation message is used to indicate whether the terminal agrees or disagrees with the first transmission mode.

[0289] Optionally, the confirmation message is sent through a random access message Msg2, Msg4 or MsgB or a downlink message after a random access procedure.

[0290] Optionally, the confirmation message includes: third indication information, and the third indication information is used to instruct the terminal to report at least one of the measurement results and the beam combination of diversity transmission, or to indicate the transmission mode of the second message.

[0291] Optionally, the sending module 220 is further configured to:

[0292] Sending a physical downlink control channel PDCCH to the terminal, where the PDCCH carries second indication information;

[0293] The second indication information is used to instruct the terminal to receive the second message according to the first transmission mode; or,

[0294] The second indication information is used to indicate that the second message is received according to the same transmission mode as that of the second indication information.

[0295] Optionally, the first transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, and multiplexing.

[0296] 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.

[0297] The 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 in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal, or it can be other devices 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 be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0298] The transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 3 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0299] As shown in Figure 6, an embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602. The memory 602 stores a program or instruction that can be run on the processor 601. For example, when the communication device 600 is a terminal, the program or instruction, when executed by the processor 601, implements the various steps of the above-mentioned transmission method embodiment and can achieve the same technical effect. When the communication device 600 is a network-side device, the program or instruction, when executed by the processor 601, implements the various steps of the above-mentioned transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0300] The present application also provides a terminal comprising 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, FIG7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0301] The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of the processor 710.

[0302] Those skilled in the art will appreciate that the terminal 700 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 710 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG7 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.

[0303] It should be understood that in an embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 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 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 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 an operating stick, which will not be repeated here.

[0304] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 701 may transmit the data to the processor 710 for processing. Furthermore, the RF unit 701 may send uplink data to the network-side device. Typically, the RF unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0305] The memory 709 can be used to store software programs or instructions and various data. The memory 709 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 709 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. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0306] Processor 710 may include one or more processing units. Optionally, processor 710 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 710.

[0307] The radio frequency unit 701 is configured to send a first message to the network side device based on the measurement result of the first signal; the first message includes reporting information of the first transmission mode;

[0308] The radio frequency unit 701 is further configured to receive a second message sent by the network side device in the first transmission mode.

[0309] Optionally, the radio frequency unit 701 is specifically configured to:

[0310] determining the first transmission mode based on the measurement result;

[0311] In a case where it is determined to use the first transmission mode, the first message is sent to the network side device.

[0312] Optionally, the device further comprises:

[0313] A processing module, configured to obtain configuration parameters of the first signal;

[0314] measuring the first signal based on configuration parameters of the first signal;

[0315] The configuration parameters of the first signal include at least one of the following:

[0316] Information of the candidate first signal;

[0317] Candidate beam combinations for the first transmission mode.

[0318] Optionally, the radio frequency unit 701 is specifically configured to:

[0319] Send the first message to the network-side device based on the configuration parameters of the first message; the configuration parameters of the first message include at least one of the following:

[0320] Random access preamble information;

[0321] Random access opportunity RO resource information.

[0322] Optionally, the first message carries the RO, RO combination, preamble or preamble combination corresponding to Msg1 in the random access procedure;

[0323] The first message is carried in the uplink data of Msg3 in the random access process;

[0324] The first message is carried in the preamble, preamble combination, RO, RO combination or uplink data corresponding to MsgA in the random access process.

[0325] Optionally, the first message also includes at least one of the following: the measurement result, and beam combination of transmission diversity.

[0326] Optionally, the radio frequency unit 701 is further configured to:

[0327] After sending the first message to the network side device, a confirmation message sent by the network side device is received, where the confirmation message is used to indicate whether to agree or disagree with the first transmission mode.

[0328] Optionally, the confirmation message is sent through a random access message Msg2, Msg4 or MsgB or a downlink message after a random access procedure.

[0329] Optionally, the confirmation message includes: third indication information, and the third indication information is used to instruct the terminal to report at least one of the measurement results and the beam combination of diversity transmission, or to indicate the transmission mode of the second message.

[0330] Optionally, the radio frequency unit 701 is specifically configured to:

[0331] The second message is received using the first transmission mode based on a predefined rule or a configuration parameter of the first transmission mode.

[0332] Optionally, the configuration parameters of the first transmission mode include at least one of the following:

[0333] trigger information of the first transmission mode;

[0334] beam combining of the first transmission mode;

[0335] The number of ports corresponding to the beam combination;

[0336] The port identifier corresponding to the beam combination;

[0337] Generation parameters of a reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0338] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0339] Optionally, the configuration parameters of the first transmission mode are determined by at least one of the following:

[0340] predefined rules, first indication information;

[0341] The first indication information is carried by at least one of the following:

[0342] Master Information Block (MIB) message, System Information Block (SIB) message, Radio Resource Control (RRC), Medium Access Control Unit (MAC) message, Downlink Control Information (DCI) message.

[0343] Optionally, the radio frequency unit 701 is specifically configured to:

[0344] Monitoring a physical downlink control channel (PDCCH) and acquiring second indication information;

[0345] Based on the second indication information, the second message is received.

[0346] Optionally, the second indication information is used to instruct the terminal to receive the second message according to the first transmission mode; or,

[0347] The second indication information is used to indicate that the second message is received according to the same transmission mode as that of the second indication information.

[0348] Optionally, the time-frequency resources and beam used to monitor the PDCCH are determined based on the resources used by the first message.

[0349] Optionally, the first transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, and multiplexing.

[0350] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiment XXX and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0351] 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 FIG3 . 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.

[0352] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 8, the network-side device 800 includes an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84, and a memory 85. Antenna 81 is connected to radio frequency device 82. In the uplink direction, radio frequency device 82 receives information via antenna 81 and sends the received information to baseband device 83 for processing. In the downlink direction, baseband device 83 processes the information to be transmitted and sends it to radio frequency device 82. Radio frequency device 82 processes the received information and then sends it through antenna 81.

[0353] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 83 , which includes a baseband processor.

[0354] The baseband device 83 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 8, one of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call the program in the memory 85 to execute the network device operations shown in the above method embodiment.

[0355] The network side device may further include a network interface 86, which is, for example, a Common Public Radio Interface (CPRI).

[0356] Specifically, the network side device 800 of the embodiment of the present application also includes: instructions or programs stored in the memory 85 and can be run on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute the methods executed by each module shown in Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0357] 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 transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0358] 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.

[0359] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0360] 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.

[0361] 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 transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0362] 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 transmission method described above, and the network-side device can be used to execute the steps of the transmission method described above.

[0363] 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.

[0364] 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.

[0365] 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 transmission method, comprising: The terminal sends a first message to the network-side device based on the measurement result of the first signal; The first message includes the reporting information of the first transmission mode; The terminal receives a second message sent by the network-side device in the first transmission mode.

2. The method according to claim 1, wherein The terminal sends a first message to the network-side device based on the measurement result of the first signal, including: The terminal determines the first transmission mode based on the measurement result; When it is determined to use the first transmission mode, the terminal sends the first message to the network-side device.

3. The method according to claim 1 or 2, wherein, The method further includes: The terminal obtains the configuration parameters of the first signal; The terminal measures the first signal based on the configuration parameters of the first signal; The configuration parameters of the first signal include at least one of the following: Information of the candidate first signal; Candidate beam combinations of the first transmission mode.

4. The method according to claim 2, wherein The terminal sends the first message to the network-side device, including: The terminal sends the first message to the network-side device based on the configuration parameters of the first message; the configuration parameters of the first message include at least one of the following: Preamble information for random access; Random access opportunity RO resource information.

5. The method according to any one of claims 1-4, wherein, The first message is carried in the RO, RO combination, preamble or preamble combination corresponding to Msg1 in the random access process; The first message is carried in the uplink data of Msg3 in the random access process; The first message is carried in the preamble, preamble combination, RO, RO combination or uplink data corresponding to MsgA in the random access process.

6. The method according to any one of claims 1-5, wherein, The first message further includes at least one of the following: the measurement result, the beam combination of transmit diversity.

7. The method according to any one of claims 1-6, wherein, After sending the first message to the network-side device, it further includes: The terminal receives an acknowledgment message sent by the network-side device, and the acknowledgment message is used to indicate agreement or disagreement with the first transmission mode.

8. The method according to claim 7, wherein, The acknowledgment message is sent through the random access message Msg2, Msg4 or MsgB or the downlink message after the random access process.

9. The method according to claim 8, wherein, The acknowledgment message includes: a third indication information, and the third indication information is used to indicate that the terminal reports at least one of the measurement result and the beam combination of diversity transmission, or is used to indicate the transmission mode of the second message.

10. The method according to any one of claims 1-9, wherein, The terminal receives the second message sent by the network-side device in the first transmission mode, including: The terminal receives the second message in the first transmission mode based on a predefined rule or the configuration parameters of the first transmission mode.

11. The method according to claim 10, wherein The configuration parameters of the first transmission mode include at least one of the following: The trigger information of the first transmission mode; The beam combination of the first 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.

12. The method according to claim 10 or 11, wherein The configuration parameters of the first transmission mode 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, Downlink Control Information (DCI) message.

13. The method according to claim 5, wherein, The terminal receives the second message sent by the network side device in the first transmission mode, including: The terminal monitors the Physical Downlink Control Channel (PDCCH) and obtains second indication information; The terminal receives the second message based on the second indication information.

14. The method according to claim 13, wherein, The second indication information is used to instruct the terminal to receive the second message in the first transmission mode; or, The second indication information is used to instruct to receive the second message in the same transmission mode as the second indication information.

15. The method according to claim 13, wherein The time-frequency resources and beams for monitoring the PDCCH are determined based on the resources used for the first message.

16. The method according to any one of claims 1-15, wherein The first transmission mode includes at least one of the following: single beam or single port transmission, multi-beam or multi-port diversity transmission, multiplexing.

17. A transmission method, including: The network side device receives a first message sent by a terminal, where the first message is sent by the terminal based on the measurement result of a first signal; The first message includes the reporting information of the first transmission mode; The network side device sends a second message to the terminal.

18. The method according to claim 17, wherein, The method further includes: The network side device sends the configuration parameters of the first signal to the terminal; The configuration parameters of the first signal include at least one of the following: Information of candidate first signals; Candidate beam combinations of the first transmission mode.

19. The method according to claim 17 or 18, wherein The method further includes: The network side device sends the configuration parameters of the first message to the terminal; The configuration parameters of the first message include at least one of the following: Preamble information for random access; Random Access Opportunity (RO) resource information.

20. The method according to claim 17 or 18, wherein The method further includes: The network side device sends the configuration parameters of the first transmission mode to the terminal; The configuration parameters of the first transmission mode include at least one of the following: Trigger information of the first transmission mode; Beam combinations of the first transmission mode; The number of ports corresponding to the beam combination; Port identifiers corresponding to the beam combination; 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.

21. The method according to claim 20, wherein The configuration parameters of the first transmission mode are 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, Downlink Control Information DCI message.

22. The method according to any one of claims 17-21, wherein the first message is carried in the RO, RO combination, preamble or preamble combination corresponding to Msg1 in the random access procedure; the first message is carried in the uplink data of Msg3 in the random access procedure; the first message is carried in the preamble, preamble combination, RO, RO combination or uplink data corresponding to MsgA in the random access procedure.

23. The method according to any one of claims 17-22, wherein the first message further includes at least one of the following: the measurement result, the beam combination of transmit diversity.

24. The method according to any one of claims 17-23, wherein, The method further includes: the network side device sends an acknowledgment message to the terminal, and the acknowledgment message is used to indicate agreement or disagreement with the first transmission mode.

25. The method according to claim 24, wherein the acknowledgment message is sent through the random access message Msg2, Msg4 or MsgB or a downlink message after the random access procedure.

26. The method according to claim 24, wherein the acknowledgment message includes: third indication information, and the third indication information is used to indicate that the terminal reports at least one of the measurement result and the beam combination of diversity transmission, or is used to indicate the transmission mode of the second message.

27. The method according to any one of claims 17-26, wherein, The method further includes: the network side device sends a Physical Downlink Control Channel PDCCH to the terminal, and the PDCCH carries second indication information; the second indication information is used to indicate that the terminal receives the second message according to the first transmission mode; or, the second indication information is used to indicate receiving the second message according to the same transmission mode as the second indication information.

28. The method according to any one of claims 17-27, wherein the first transmission mode includes at least one of the following: single beam or single port transmission, multi-beam or multi-port diversity transmission, multiplexing.

29. A transmission device, comprising: a sending module, configured to send a first message to a network side device based on a measurement result of a first signal; the first message includes reporting information of a first transmission mode; a receiving module, configured to receive a second message sent by the network side device in the first transmission mode.

30. A transmission device, comprising: a receiving module, configured to receive a first message sent by a terminal, where the first message is sent by the terminal based on a measurement result of a first signal; the first message includes reporting information of a first transmission mode; a sending module, configured to send a second message to the terminal.

31. 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 transmission method according to any one of claims 1 to 16 are implemented.

32. A network-side device, comprising a processor and a memory, where the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the steps of the transmission method according to any one of claims 17 to 27 are implemented.

33. A readable storage medium, where programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the transmission method according to any one of claims 1 to 16 is implemented, or the steps of the transmission method according to any one of claims 17 to 27 are implemented.

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