Transmission method, terminal and network side equipment

Abstract

The invention discloses a transmission method, a terminal and network side equipment, and belongs to the technical field of communication, and the transmission method comprises the steps that the terminal sends a first message to the network side equipment based on a measurement result of a first signal; the first message comprises report information of a first transmission mode; and the terminal receives a second message sent by the network side device in the first transmission mode.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a transmission method, a terminal, and a network-side device. Background Art

[0002] In a cell-free network architecture or a scenario of multiple transmit / receive points (TRPs), each TRP or TRP cluster will cover the corresponding area according to network planning; and multiple TRPs will be deployed in hot-spot coverage areas and cooperative transmission areas to provide coverage. Therefore, in a cell-free network architecture, there are areas where the synchronization signal beam coverage overlaps between multiple TRPs or TRP clusters.

[0003] 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. How to enable the terminal and the network-side device to have a consistent understanding of the transmission mode of the downlink signal is a problem that needs to be solved. Summary of the Invention

[0004] Embodiments of this 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.

[0005] In a first aspect, a transmission method is provided, including:

[0006] Based on the measurement result of a first signal, a terminal sends a first message to a network-side device; the first message includes reporting information on a first transmission mode;

[0007] The terminal receives a second message sent by the network-side device in the first transmission mode.

[0008] In a second aspect, a transmission method is provided, including:

[0009] A 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 reporting information on a first transmission mode;

[0010] The network-side device sends a second message to the terminal.

[0011] In a third aspect, a transmission device is provided, including:

[0012] A sending module, configured to send a first message to a network-side device based on the measurement result of a first signal; the first message includes reporting information on a first transmission mode;

[0013] A receiving module, configured to receive a second message sent by the network side device in the first transmission mode.

[0014] In a fourth aspect, a transmission device is provided, including:

[0015] 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;

[0016] A sending module, configured to send a second message to the terminal.

[0017] In a fifth aspect, a terminal is provided, which includes 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 method described in the first aspect are implemented.

[0018] In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is 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; and receive a second message sent by the network side device in the first transmission mode.

[0019] In an eighth aspect, a network side device is provided, which includes 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 method described in the second aspect are implemented.

[0020] In a ninth aspect, a network side device is provided, including a processor and a communication interface, where the communication interface 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; and send a second message to the terminal.

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

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

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

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

[0025] 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. This enables the network-side device to send a signal to the terminal based on the first transmission mode reported by the terminal. 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 have a consistent understanding of the transmission mode of the downlink signal. Description of the Drawings

[0026] Figure 1 is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the present application;

[0027] Figure 2 is one of the flow diagrams of the transmission method provided by an embodiment of the present application;

[0028] Figure 3 is another flow diagram of the transmission method provided by an embodiment of the present application;

[0029] Figure 4 is one of the structural diagrams of the transmission device provided by an embodiment of the present application;

[0030] Figure 5 is another structural diagram of the transmission device provided by an embodiment of the present application;

[0031] Figure 6 is the structural diagram of the communication device provided by an embodiment of the present application;

[0032] Figure 7 is the structural diagram of the terminal provided by an embodiment of the present application;

[0033] Figure 8 is the structural diagram of the network-side device provided by an embodiment of the present application. Detailed Embodiments

[0034] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0035] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances 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 usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0036] The term "indicate" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the recipient of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the recipient determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0037] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and 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 this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for illustrative purposes, and the NR term is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6G) communication system. th Generation, 6G) communication system.

[0038] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a 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, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc., which are terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can 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 may 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, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0039] The core network device may include, but is not limited to, at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0040] First, the technical terms and application scenarios involved in the embodiments of this application are introduced:

[0041] The Cell free Massive Multiple-input / multiple-output (MIMO) system can be regarded as a deconstruction of the traditional Massive MIMO system. In the traditional Massive MIMO system, antennas are concentrated and distributed at a single site (base station), and terminals are distributed around the base station in the form of cells. In a Massive MIMO system, a relatively large number of antennas are deployed at each base station. Therefore, a relatively high array gain and spatial resolution are provided. Multiple terminals can be served simultaneously on the same time-frequency resources, providing high throughput, high reliability, and high energy efficiency. The Cell free Massive MIMO system breaks the concept of cells, with a large number of antennas scattered over a wide area, and terminals are also scattered 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. With the help of the fronthaul network and the Central Processing Unit (CPU), a large number of geographically dispersed TRPs can jointly serve a smaller number of terminals, and the CPU uses channel statistical information for joint detection. The Cell Free Massive MIMO network is expected to be applied to next-generation indoor and hotspot coverage scenarios, such as smart factories, railway stations, shopping malls, stadiums, subways, hospitals, community centers, or university campuses, etc.

[0042] In actual deployment, the Cell free network in a hotspot area can be regarded as a super cell containing multiple TRPs, where multiple TRPs use the same cell ID. According to the synchronization accuracy and connection relationship between these TRPs, multiple TRPs with high synchronization accuracy can achieve cooperative transmission.

[0043] Channels related to broadcast in a cell-free network (such as synchronization channel, random access channel, broadcast Physical Downlink Control Channel (PDCCH), and Physical Downlink Shared Channel (PDSCH), etc.) can be implemented according to a Single Frequency Network (SFN) or distributed networking. When the number of Transmission and Reception Points (TRPs) in the cell-free network increases and the coverage range expands, the number of required Synchronization Signal Blocks (Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) Block, SSB) beams will continuously increase, and the corresponding resources occupied by broadcast PDCCH and PDSCH will also continuously increase.

[0044] The Space Frequency Block Code (SFBC) diversity transmission technology was introduced in the LTE system and can be used for PDSCH data transmission. However, the SFBC diversity transmission scheme in LTE restricts the number of ports of the Cell Reference Signal (CRS) of the base station to be 2 or 4 and is bound to other broadcast signals (such as CRS). In the 5G NR system, a beam-based synchronization signal transmission mechanism was introduced. According to network planning, different SSB beams correspond to different coverage areas. In a centrally deployed network, theoretically, the terminal will only receive an SSB beam signal with better signal quality, that is, the SSB beam in the area where the terminal is located. Therefore, beamforming gain is used to replace the LTE transmission diversity gain for the signal transmission related to broadcast in the 5G NR network.

[0045] A cell-free network may contain a large number of TRP nodes, and each node 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 the cell. However, beam-based system information transmission will lead to an increase in the time-frequency resources occupied by system information, especially when the number of synchronization signal beams in the cell-free network is increasing. In a cell-free network, in order to achieve cooperative 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 coverage overlap area can receive synchronization signals sent by multiple TRP nodes, and thus use transmit diversity to receive cell-level PDCCH and PDSCH from multiple TRP nodes. Connected terminals can use multi-TRP 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 a TRP or a TRP cluster corresponding to a synchronization signal beam, 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.

[0046] Therefore, in order to solve the problem of excessive resource occupation by system information in the cell-free network and improve the system information transmission efficiency, the method of the embodiment of the present invention proposes to schedule multiple TRP nodes to transmit system information in a transmit diversity manner; instead of the manner of multiple TRP nodes transmitting system information separately.

[0047] NR supports two types of random access procedures: the 4-step RA type (4-step RACH) of Msg1 and the 2-step RA type (2-step RACH) of 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 applied to areas with good coverage to shorten the terminal access time. For areas with poor signal coverage, the terminal should use the 4-step RACH procedure to access the cell.

[0048] In the 4-step RACH, the terminal first sends Msg1 to the network, which contains a preamble. After the terminal sends the preamble, it will listen for the PDCCH within the Random Access Response (RAR) time window (RAR window), using the fallback downlink control information (DCI) format, namely DCI format 1_0, to receive the random access response RAR scheduled by the PDCCH scrambled with the Random Access Radio Network Temporary Identifier (RA-RNTI). If the preamble index in the RAR is the same as the preamble index sent by the terminal, it is considered that the RAR has been successfully received. At this time, the terminal can stop listening for the RAR and send Msg3 according to the indication of 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 for scheduling the retransmission of Msg3 is scrambled with the Temporary Cell RNTI (TC-RNTI) indicated by the RAR, and the fallback DCI format, namely DCI format 0_0, is used. Msg3 contains the unique identifier of the terminal. This identifier will be used for contention resolution in step four. After the network-side device receives Msg3, it will schedule Msg4 with the PDCCH scrambled with TC-RNTI. When the terminal successfully decodes the Medium Access Control Control Element (MAC CE) of the UE Contention Resolution Identity contained in Msg4 and it matches the UE Contention Resolution Identity sent in Msg3, the terminal will consider the random access successful and set its own Cell RNTI (C-RNTI) to TC-RNTI, thus completing the 4-step random access.

[0049] In the cell edge area or in the area with limited coverage, the uplink signal coverage performance of the terminal is usually inferior to that of the downlink signal, that is, the coverage performance of Msg1 and Msg3 is inferior to that of Msg2 and Msg4. Moreover, the coverage performance gap between the uplink and downlink channels in the high-frequency band FR2 is more obvious. To improve the coverage performance of the uplink signal, a method of repeatedly transmitting the uplink signal is considered.

[0050] In future scenarios with limited coverage, since the SSB beam is usually a fixed beam, there may be an area where the SSB beams overlap. In this case, the signal quality of multiple SSBs detected by the terminal (such as the SS-Reference Signal Received Power (RSRP)) may be similar. Selecting one SSB beam 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 in the random access phase, the measurement of SS-RSRP is determined only based on the single measurement result of the SSB, there may be a measurement deviation in the SS-RSRP measurement result. Therefore, selecting multiple SSBs to send Msg1 can also reduce the impact of the SSB measurement deviation on the SSB selection.

[0051] The transmission method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

[0052] Please refer to Figure 2 , the embodiments of the present application provide a transmission method. The execution subject of this embodiment is a terminal, and the method includes:

[0053] Step 101, 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;

[0054] 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, multiplexing.

[0055] 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 the transmission mode is reported to the network-side device through the first message, such as single-beam transmission or multi-beam diversity transmission.

[0056] In a Cell free or multi-TRP network, the terminal measures the first signal (synchronization signal or CSI-RS or other signals) to determine whether diversity transmission can be used to transmit the downlink signal;

[0057] For example, for contention-based random access, the first signal may be a synchronization signal;

[0058] For non-contention-based random access, the first signal may be a synchronization signal or CSI-RS.

[0059] Step 102, the terminal receives a second message sent by the network device in the first transmission mode.

[0060] Optionally, the second message may be Msg2 or Msg4 or MsgB in random access, or a downlink message after random access.

[0061] After the terminal reports a request for the first transmission mode based on the measurement result, it receives the second message in the first transmission mode.

[0062] In the method of this embodiment, the terminal sends a first message to the network 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 device in the first transmission mode, that is, a solution for reporting and requesting a transmission mode using an uplink message is implemented.

[0063] Optionally, the first message is carried in a random access occasion (RachOccasion, RO), RO combination, preamble, or preamble combination corresponding to Msg1 in the random access process;

[0064] The first message is carried in the uplink data of Msg3 in the random access process;

[0065] The first message is carried in the preamble, preamble combination, RO, RO combination, or uplink data MsgA PUSCH corresponding to MsgA in the random access process.

[0066] Optionally, the method further includes:

[0067] The terminal obtains configuration parameters of the first signal;

[0068] The terminal measures the first signal based on the configuration parameters of the first signal;

[0069] The configuration parameters of the first signal include at least one of the following:

[0070] Information of candidate first signals;

[0071] Candidate beam combinations of the first transmission mode.

[0072] Specifically, the network-side device configures multiple candidate beams / signals (such as SSB or CSI-RS) to be measured for the terminal, or candidate beam / signature combinations, where the candidate beam combinations 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.

[0073] The terminal can measure based on the candidate signals to be measured, or the candidate beam combinations, and determine whether to request multi-beam diversity transmission according to the measurement results; if it applies for multi-beam diversity transmission, it 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 the confirmation information of the diversity transmission request in the subsequent downlink message.

[0074] Optionally, the terminal determines the first transmission mode based on the measurement results;

[0075] In the case of determining to use the first transmission mode, the terminal sends the first message to the network-side device.

[0076] 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.); determines whether to apply for multi-beam diversity transmission according to the measurement results of the signal quality. 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 and determines whether it is suitable for transmission diversity. For example, the signal quality gap between the two reference signals is less than the threshold. Another example is that 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) according to the measurement results of the multiple reference signals and determines the corresponding beam / beam combination (i.e., the number / identifier of the reference signal). Another example is that the network-side device configures multiple reference signals for the terminal, and the terminal determines whether there is a beam among the multiple reference signals that can be combined with the default beam (for example, the beam on which the terminal currently monitors the PDCCH) for diversity transmission according to the measurement results of the multiple reference signals.

[0077] Possible cases of transmission mode requests include: switching from single-beam transmission to multi-beam diversity transmission, or 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 of the beams, or updating all the beams).

[0078] Trigger conditions for transmission mode switching include, for example:

[0079] Switching from single-beam transmission to multi-beam diversity transmission: the signal quality of multiple reference signals is higher than a first threshold; the signal quality of the reference signal corresponding to the beam combination of a certain transmission diversity is higher than the signal quality of the reference signal corresponding to the single-beam transmission being used / activated;

[0080] Switching from multi-beam diversity transmission to single-beam transmission: the signal quality of a certain reference signal (not the beam of the multi-beam diversity transmission) is higher than the signal quality of at least one reference signal corresponding to the multi-beam diversity transmission;

[0081] Multi-beam diversity transmission area switching: the signal quality of the reference signal corresponding to the beam combination of a certain transmission diversity is higher than the signal quality of the reference signal corresponding to the multi-beam diversity transmission being used / activated.

[0082] Among them, the signal quality comparison method of the reference signal corresponding to the beam combination: the result of mathematical processing of the signal quality of each reference signal in the reference signal corresponding to the beam combination represents the signal quality of the reference signal corresponding to the beam combination. For example, the minimum / maximum / average / weighted sum of the signal quality in the signal quality of the reference signal corresponding to the beam combination.

[0083] Optionally, 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:

[0084] Preamble information for random access;

[0085] Random access opportunity RO resource information.

[0086] Specifically, the network-side device can configure a preamble for the terminal corresponding to random access, and a random access opportunity RO resource for transmitting the first message.

[0087] Optionally, the configuration parameters of the first message can also include at least one of the following:

[0088] Transmission mode;

[0089] The beam combination of the diversity transmission;

[0090] The number of ports corresponding to the beam combination;

[0091] The port identifier corresponding to the beam combination;

[0092] 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;

[0093] The precoding information corresponding to the beam combination and the resource mapping information corresponding to the precoding information;

[0094] Optionally, the transmission mode includes at least one of the following: single-beam or single-port transmission, multi-beam or multi-port diversity transmission, multiplexing.

[0095] Specifically, the terminal can also perform multi-beam diversity transmission based on the configuration parameters of the above first message.

[0096] Exemplarily, the terminal uses the dedicated preamble / RO resource corresponding to the multi-beam diversity transmission to send the first message. That is: the preamble / RO resource is associated with the SSB of the diversity transmission. For example, the system information configures SSB#0 and SSB#1 as the beam combination of the diversity transmission, and configures preamble#i to i+L (i and L are positive integers) in the resources corresponding to SSB#0 as the dedicated resource set for the diversity transmission. The terminal selects preamble in the dedicated resource set of SSB#0, for example, preamble#i+1, to send the first message, and then selects preamble in the dedicated resource set of SSB#1 to send Msg1, notifying the network-side device that it can use the diversity transmission based on SSB#0 and SSB#1 for downlink signal transmission. It can be understood that for the terminal of the diversity transmission, the SSB associated with the first message is one of the SSBs of the multi-beam diversity transmission; the terminal sends multiple first messages, each associated with multiple SSBs of the multi-beam diversity transmission.

[0097] Exemplarily, the system information configures SSB#0 and SSB#1 as the beam combination of the diversity transmission, and configures preamble#k to k+M (k and M are positive integers) in the resources of the first message as the dedicated resource set for the diversity transmission based on SSB#0 and SSB#1. The terminal selects preamble in the dedicated resource set, for example, preamble#k+1, to send Msg1, notifying the network-side device that it can use the diversity transmission based on SSB#0 and SSB#1 for downlink signal transmission. It can be understood that for the terminal of the diversity transmission, the first message is associated with multiple SSBs of the multi-beam diversity transmission.

[0098] Optionally, the first message further includes at least one of the following: the measurement result, the beam combination of the transmit diversity.

[0099] Specifically, when the terminal sends the first message, it may carry at least one of the measurement result and the beam combination for diversity transmission. The network-side device may perform downlink signal transmission based on the information reported by the terminal.

[0100] Optionally, after sending the first message to the network-side device, it further includes:

[0101] The terminal receives the acknowledgment message sent by the network-side device.

[0102] Optionally, the acknowledgment message is sent through the random access message Msg2, Msg4, or MsgB, or a downlink message after the random access procedure.

[0103] Optionally, the acknowledgment message includes: a third indication information, which is used to indicate that the terminal reports at least one of the measurement result and the beam combination for diversity transmission, or is used to indicate the transmission mode of the second message.

[0104] Specifically, after receiving the first message, the network-side device may send an acknowledgment message to the terminal. The acknowledgment message may be used to indicate agreement or disagreement with the terminal's request for the transmission mode, such as agreeing or disagreeing with the diversity transmission request.

[0105] The third indication information is used to indicate that the terminal reports at least one of the measurement result and the beam combination for diversity transmission. The terminal may carry at least one of the measurement result and the beam combination for diversity transmission in a subsequent uplink message.

[0106] The third indication information may also be used to indicate the transmission mode of the second message. The terminal may receive the second message based on the transmission mode indicated by the third indication information.

[0107] For example, 1 bit is carried in the RAR of the first message to indicate that the terminal reports the SSB measurement result or the beam combination information for multi-beam diversity transmission.

[0108] In the above embodiments, the network-side device may notify the terminal whether it agrees with the first transmission mode by sending an acknowledgment message. The terminal may receive the second message based on the acknowledgment message sent by the network-side device, and the implementation complexity of the terminal is relatively low.

[0109] Optionally, the terminal uses the first transmission mode to receive the second message based on a predefined rule or the configuration parameters of the first transmission mode.

[0110] Specifically, the predefined rule is, for example, to use the first transmission mode to receive the second message after receiving the acknowledgment message.

[0111] The configuration parameters of the first transmission mode can be pre-configured, i.e., configured before sending the first message, or configured after sending the first message.

[0112] Optionally, the configuration parameters of the first transmission mode include at least one of the following:

[0113] The triggering information of the first transmission mode;

[0114] The beam combination of the first transmission mode;

[0115] The number of ports corresponding to the beam combination;

[0116] The port identifier corresponding to the beam combination;

[0117] 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;

[0118] The precoding information corresponding to the beam combination and the resource mapping information corresponding to the precoding information.

[0119] Optionally, the network-side device can configure semi-static diversity transmission or dynamically scheduled diversity transmission for the terminal in the Msg2 or Msg4 phase.

[0120] Optionally, the configuration parameters of the first transmission mode are determined by at least one of the following:

[0121] Predefined rules, first indication information;

[0122] The first indication information is indicated by at least one of the following: Master Information Block (MIB) message, System Information Block (SIB) message, Radio Resource Control (RRC), Medium Access Control Unit MAC CE message, and Downlink Control Information DCI message.

[0123] Specifically, the predefined rules include, for example: the layout mode of the synchronization signal, for example: Synchronization Signal Beam Layout 1 (SS beam pattern 1) corresponds to single-beam transmission / single-port transmission; Synchronization Signal Beam Layout 2 (SS beam pattern 2) corresponds to diversity transmission.

[0124] Or, the configuration parameters of the first transmission mode are indicated by the MIB message. For example, the MIB message indicates whether the synchronization signal beam associated with the MIB uses transmission diversity. Optionally, the MIB message can indicate that before configuring other transmission modes in the connected state, the downlink signal is transmitted using the transmission diversity mode.

[0125] Alternatively, the configuration parameters of the first transmission mode are indicated by SIB messages. For example, the SIB message indicates the beam combination information of the synchronization signal beams participating in transmit diversity, or the PDCCH and / or scheduled PDSCH associated with the beam combination of the synchronization signal beams use transmit diversity.

[0126] Alternatively, the configuration parameters of the first transmission mode are indicated by higher layer signaling (such as RRC messages and / or MAC CE messages). For example, the beam combination information of the synchronization signal or CSI-RS beams is indicated, and the PDCCH or PDSCH is received according to the transmit diversity of the beam combination.

[0127] Alternatively, when dynamically scheduling the PDSCH with transmit diversity, the relevant configuration parameters are carried in the DCI message.

[0128] It can be understood that the above several ways of obtaining the configuration parameters can be combined with each other to determine a complete set of configuration parameters of the first transmission mode. For example, the SIB message configures several candidate beam combinations for transmit diversity. When dynamically scheduling the PDSCH transmit diversity, the DCI information indicates one of the candidate beam combinations for PDSCH transmit diversity.

[0129] Optionally, the triggering information can be used to indicate the triggering of the first transmission mode, such as transmit diversity, or to enable / disable the first transmission mode, or can be used to indicate the switching of the transmission mode.

[0130] In the above embodiments, the configuration parameters of transmit diversity can be obtained in multiple ways, with greater flexibility and lower implementation complexity.

[0131] Optionally, the beam combination is a beam combination of synchronization signal beams in a preset synchronization signal beam set, or a reference signal beam combination quasi-co-located with the synchronization signal beams in the synchronization signal beam set.

[0132] 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;

[0133] The port identifier corresponding to the beam combination is determined based on the beam order of the beam combination of the transmit diversity, or the inclusion relationship.

[0134] Among them, the beam order can be the order arranged in sequence according to the beam numbers. For example, beam 1 corresponds to port number 1001, and beam 2 corresponds to 1002. For example, the port number corresponding to the transmit diversity is determined according to the number size of the reference signal corresponding to the beam of the transmit diversity.

[0135] The inclusion relationship refers to, for example, the inclusion relationship between the upper-level synchronization signal beam and the lower-level synchronization signal beam in a Cell free network. For example, the first-level synchronization signal beam 1, the second-level synchronization signal beams 1-1 and 1-2 perform transmit 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 covered by the macro station node.

[0136] Optionally, the resource mapping information corresponding to the precoding information is obtained by mapping the time-frequency resources corresponding to the precoding information in sequence based on the port order corresponding to the beam combination, or the beam order in the beam combination, or the inclusion relationship.

[0137] Specifically, different numbers of beams for transmit diversity correspond to different precoding matrices. For example, a beam combination with 2 beams corresponds to one coding matrix, and a beam combination with 4 beams corresponds to one coding matrix.

[0138] Each beam in the beam combination corresponds to different rows and columns of the precoding matrix. For example, it corresponds to different rows and columns of the precoding matrix based on the port order, beam order, and inclusion relationship.

[0139] Optionally, the configuration parameters of the first message or the first signal can also be determined by at least one of the following:

[0140] Predefined rules, first indication information;

[0141] The first indication information is indicated by at least one of the following: Master Information Block MIB message, System Information Block SIB message, Radio Resource Control RRC, Medium Access Control Unit MAC CE message, and Downlink Control Information DCI message.

[0142] Optionally, the terminal receives the second message sent by the network side device in the first transmission mode, including:

[0143] The terminal monitors the Physical Downlink Control Channel PDCCH and obtains second indication information;

[0144] The terminal receives the second message based on the second indication information.

[0145] Optionally, the second indication information is used to instruct the terminal to receive the second message in the first transmission mode; or,

[0146] The second indication information is used to instruct to receive the second message in the same transmission mode as the second indication information.

[0147] Optionally, the second indication information is carried by DCI.

[0148] Optionally, the time-frequency resources and beam for monitoring the PDCCH are determined based on the resources used in the first message.

[0149] Specifically, the terminal monitors the PDCCH and receives second indication information. Optionally, the time-frequency resources (CORESET) for monitoring the PDCCH and the monitoring beam (QCL assumption) are determined based on the resources used in the first message. For example, if the terminal uses the preamble / RO resources of 4-step RACH to send the first message, the terminal uses time-frequency resources (e.g., DCI search space) to monitor DCI. Optionally, the terminal sends the first message on the resources associated with multiple SSBs, and the terminal monitors DCI on the PDCCH time-frequency resources corresponding to multiple SSBs respectively. Further optionally, the terminal monitors DCI on the PDCCH time-frequency resources corresponding to multiple SSBs in a diversity transmission mode.

[0150] Optionally, the terminal receives the second message in a diversity transmission mode according to a predefined rule or an indication of higher layer signaling or an explicit indication of DCI. For example, if the terminal uses dedicated preamble / RO resources for diversity transmission to send the first message, by default, the second message is received in a diversity transmission mode; or, a 1-bit field in the DCI indicates that the terminal receives the second message in a diversity transmission mode; or, the second message scheduled by the DCI is received in the same transmission mode as the DCI; or, a corresponding field in the MAC CE signaling indicates that the terminal receives the second message in a diversity transmission mode after a specific time length, or after a specific time length after the feedback ACK message, and the specific time length can be predefined by the protocol or explicitly indicated.

[0151] For example, the second message in diversity transmission contains signals of multiple synchronization signal SS beams, and the RAR / sub packet data unit (sub PDU) in the second message contains a response message to the first message associated with the above multiple SS beams. Optionally, a 1-bit is carried in the RAR to indicate that the terminal reports the SSB measurement result or the beam information of multi-beam diversity transmission.

[0152] When the first message is Msg1, the method further includes:

[0153] The terminal sends a third message to the network device;

[0154] The terminal monitors the PDCCH and obtains fourth indication information;

[0155] The terminal receives a fourth message based on the fourth indication information;

[0156] The third message includes at least one of the measurement result and the beam combination for diversity transmission;

[0157] The fourth message is used to indicate the transmission mode of the downlink signal after the random access procedure.

[0158] Optionally, the synchronization signal beam associated with the third message or the first message is one of the beams for diversity transmission, and the information of the other beams for diversity transmission is carried in the third message.

[0159] 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 for multi-beam diversity transmission, and only the information of the other beams for multi-beam diversity transmission (for example, SS identifier / number, SS signal quality) is carried in Msg3

[0160] Specifically, after the terminal receives the confirmation message for diversity transmission in the middle (such as Msg2), it detects the DCI in the diversity transmission mode, or detects the DCI corresponding to the fourth message (such as Msg4) in the same transmission mode as the DCI corresponding to Msg2, or defaults to receive the DCI corresponding to Msg4 in the single-beam transmission mode. Optionally, the DCI corresponding to the Msg4 explicitly indicates the transmission mode of the Msg4 PDSCH, or receives the Msg4 PDSCH in the same transmission mode as the DCI. Optionally, Msg4 indicates the transmission mode of the downlink signal (multi-beam diversity transmission or single-beam transmission) after the random access procedure, and the downlink signal includes PDCCH and / or PDSCH.

[0161] Optionally, in the above embodiments, when the synchronization signal beam associated with the third message or the first message is one of the beams for diversity transmission, only the information of the other beams for diversity transmission is carried in the third message, which can reduce the signaling overhead of configuring the transmission diversity parameters.

[0162] Optionally, before sending the first message to the network side device, it further includes:

[0163] The terminal determines whether the usage conditions for two-step random access are met;

[0164] When it is determined that the usage conditions for the two-step random access are met, the first message is sent to the network side device.

[0165] Specifically, two-step random access is usually used in scenarios with good network coverage quality. In this scenario, the terminal may detect that the signal quality of multiple SSB signals is good. The beam combination for diversity transmission is determined and a request for diversity transmission is made through explicit configuration by the network side device (for example, indicated by the SIB message during initial access, indicated by the RRC message in the CFRA scenario) or by the terminal based on the SSB measurement results.

[0166] Exemplarily, after the terminal obtains downlink synchronization and system information through the cell search process:

[0167] 1. When the SSB signal quality meets the usage 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-competitive 2-step RA, the network-side device configures multiple reference signals to be measured (SSB or CSI-RS); the terminal measures the reference signals.

[0168] 2. The terminal determines the transmission mode (single-beam transmission, multi-beam diversity transmission) of MsgB or the downlink signal after random access according to the measurement results of each SSB. For example, the terminal selects two or more SSBs from the SSBs that meet the conditions according to 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 can be: for example, the two SSBs with the best signal quality; or, the signal quality of the two SSBs is higher than the first threshold and the signal quality difference between the two SSBs is less than the second threshold; or, for the SSB beam combination pre-configured in the 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 quality 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 can be predefined threshold values or network-configured threshold values. The above only takes two SSBs as an example, and in other embodiments, it can also be more than two SSBs, and the embodiments of the present application do not limit this.

[0169] 3. The terminal sends MsgA, and carries the measurement results of the SSB or the reference signal to be measured (for example, the measurement results of all SSBs or the reference signals to be measured, or several of the best measurement results) in the Physical Uplink Shared Channel (PUSCH) of MsgA, and / or carries the reporting information of the transmission mode (such as requesting single-beam transmission or multi-beam diversity transmission) in the MsgA PUSCH. If the terminal requests multi-beam diversity transmission, the MsgA PUSCH carries the selection result of the multi-beams (for example, the SSB number). Optionally, the terminal can default that the SSB or reference signal associated with MsgA is one of the beams for multi-beam diversity transmission, and the MsgA PUSCH only needs to indicate the numbers of the other beams.

[0170] 4. After the network-side device successfully receives MsgA, it sends MsgB; the confirmation information of the transmission mode request is carried in the MsgB PDCCH or PDSCH. It can be understood that the confirmation information can be a request to agree to the multi-beam diversity transmission of the terminal; it can also be a request that does not agree to the multi-beam diversity transmission, and the terminal continues to use the default transmission mode / single-beam transmission of the 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, if the network-side device agrees to the multi-beam diversity transmission request, according to the predefined rules or network configuration or terminal request, the transmission combinations of the downlink signal include: both the PDCCH and PDSCH use diversity transmission; the PDCCH is transmitted in a single beam, and the PDSCH is transmitted in diversity; the PDCCH is transmitted in diversity, and the PDSCH is transmitted in a single beam.

[0171] Optionally, the MsgA PUSCH can also carry information for applying for multiplexing. That is, the application information of the MsgA PUSCH includes information for applying for a transmission mode, and the transmission mode can be transmission diversity, multiplexing, or single-stream transmission.

[0172] In summary, the method of the embodiment of the present application provides a method for diversity transmission of the downlink signal in the random access process in the case of distributed / cell free networking, and realizes a scheme for reporting and requesting transmission diversity using the uplink message. It improves the transmission success rate of the downlink signal in the non-connected state, provides a scheme for quickly realizing diversity transmission, and reduces the interference between multiple TRPs in the non-connected state.

[0173] Please refer to Figure 3 , the embodiment of the present application provides a transmission method. The execution subject of this embodiment is a network-side device, and the method includes:

[0174] Step 201, the network-side device receives a first message sent by the terminal, and the first message is sent by the terminal based on the measurement result of the first signal; the first message includes the reporting information of the first transmission mode;

[0175] Step 202, the network-side device sends a second message to the terminal.

[0176] Optionally, the method further includes:

[0177] The network-side device sends the configuration parameters of the first signal to the terminal;

[0178] The configuration parameters of the first signal include at least one of the following:

[0179] Information of the candidate first signal;

[0180] Candidate beam combinations of the first transmission mode.

[0181] Optionally, the method further includes:

[0182] The network side device sends configuration parameters of the first message to the terminal;

[0183] The configuration parameters of the first message include at least one of the following:

[0184] Preamble information for random access;

[0185] Random access opportunity (RO) resource information.

[0186] Optionally, the method further includes:

[0187] The network side device sends configuration parameters of the first transmission mode to the terminal;

[0188] The configuration parameters of the first transmission mode include at least one of the following:

[0189] Trigger information of the first transmission mode;

[0190] Beam combination of the first transmission mode;

[0191] The number of ports corresponding to the beam combination;

[0192] Port identifier corresponding to the beam combination;

[0193] Generation parameters of the reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence;

[0194] Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

[0195] Optionally, the configuration parameters of the first transmission mode are carried by at least one of the following:

[0196] Master information block (MIB) message, system information block (SIB) message, radio resource control (RRC), media access control element (MACCE) message, downlink control information (DCI) message.

[0197] Optionally, the first message is carried in the RO, RO combination, preamble, or preamble combination corresponding to Msg1 in the random access procedure;

[0198] The first message is carried in the uplink data of Msg3 in the random access procedure;

[0199] The first message is carried in the preamble, preamble combination, RO, RO combination, or uplink data corresponding to MsgA in the random access procedure.

[0200] Optionally, the first message further includes at least one of the following: the measurement result, and the beam combination of transmit diversity.

[0201] Optionally, the method further includes:

[0202] The network-side device sends an acknowledgment message to the terminal, where the acknowledgment message is used to indicate agreement or disagreement with the first transmission mode.

[0203] Optionally, the acknowledgment message is sent by using a random access message Msg2, Msg4, or MsgB, or a downlink message after the random access procedure.

[0204] Optionally, the acknowledgment message includes: third indication information, where 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.

[0205] Optionally, the method further includes:

[0206] The network-side device sends a physical downlink control channel PDCCH to the terminal, where the PDCCH carries second indication information;

[0207] The second indication information is used to indicate that the terminal receives the second message according to the first transmission mode; or,

[0208] The second indication information is used to indicate receiving the second message according to the same transmission mode as the second indication information.

[0209] 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.

[0210] The method in this embodiment has a specific implementation process and technical effects similar to those in the method embodiment on the terminal side. For specific details, reference may be made to the detailed introduction in the method embodiment on the terminal side, which will not be elaborated here.

[0211] For the transmission method provided in the embodiment of the present application, the execution subject may be a transmission device. In the embodiment of the present application, taking the transmission device as the execution subject of the transmission method as an example, the transmission device provided in the embodiment of the present application is described.

[0212] Figure 4 is one of the schematic structural diagrams of the transmission device provided in the embodiment of the present application. As Figure 4 shown, the transmission device provided in this embodiment includes:

[0213] A sending module 110, 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;

[0214] A receiving module 120, configured to receive a second message sent by the network side device in the first transmission mode.

[0215] Optionally, the sending module 110 is specifically configured to:

[0216] Determine the first transmission mode based on the measurement result;

[0217] When it is determined to use the first transmission mode, send the first message to the network side device.

[0218] Optionally, the apparatus further includes:

[0219] A processing module, configured to obtain configuration parameters of a first signal;

[0220] Measure the first signal based on the configuration parameters of the first signal;

[0221] The configuration parameters of the first signal include at least one of the following:

[0222] Information of a candidate first signal;

[0223] Candidate beam combinations of the first transmission mode.

[0224] Optionally, the sending module 110 is specifically configured to:

[0225] 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:

[0226] Preamble information for random access;

[0227] Random access opportunity RO resource information.

[0228] Optionally, the first message is carried in an RO, an RO combination, a preamble, or a preamble combination corresponding to Msg1 in the random access procedure;

[0229] The first message is carried in the uplink data of Msg3 in the random access procedure;

[0230] The first message is carried in a preamble, a preamble combination, an RO, an RO combination, or uplink data corresponding to MsgA in the random access procedure.

[0231] Optionally, the first message further includes at least one of the following: the measurement result, a beam combination for transmit diversity.

[0232] Optionally, the receiving module 120 is further configured to:

[0233] After sending a first message to a network-side device, receive an acknowledgment message sent by the network-side device, where the acknowledgment message is used to indicate agreement or disagreement with the first transmission mode.

[0234] Optionally, the acknowledgment message is sent through a random access message Msg2, Msg4, or MsgB, or a downlink message after a random access procedure.

[0235] Optionally, the acknowledgment message includes: third indication information, where the third indication information is used to indicate that the terminal reports at least one of the measurement result and the beam combination for diversity transmission, or is used to indicate the transmission mode of the second message.

[0236] Optionally, the receiving module 120 is specifically configured to:

[0237] Receive the second message using the first transmission mode based on a predefined rule or a configuration parameter of the first transmission mode.

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

[0239] The triggering information of the first transmission mode;

[0240] The beam combination of the first transmission mode;

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

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

[0243] 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;

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

[0245] Optionally, the configuration parameter of the first transmission mode is determined by at least one of the following:

[0246] A predefined rule, first indication information;

[0247] The first indication information is carried by at least one of the following:

[0248] Master Information Block MIB message, System Information Block SIB message, Radio Resource Control RRC, Medium Access Control Element MACCE message, Downlink Control Information DCI message.

[0249] Optionally, the receiving module 120 is specifically configured to:

[0250] Monitor the Physical Downlink Control Channel (PDCCH) and obtain second indication information;

[0251] Receive the second message based on the second indication information.

[0252] Optionally, the second indication information is used to instruct the terminal to receive the second message according to the first transmission mode; or,

[0253] The second indication information is used to instruct to receive the second message according to the same transmission mode as the second indication information.

[0254] Optionally, the time-frequency resources and beam for monitoring the PDCCH are determined based on the resources used for the first message.

[0255] 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, multiplexing.

[0256] The device in this embodiment can be used to execute each process in the foregoing method embodiment on the terminal side. Its specific implementation process and technical effects are similar to those in the method embodiment on the terminal side. For details, reference can be made to the detailed description in the method embodiment on the terminal side, which will not be elaborated here.

[0257] Figure 5 It is the second structural schematic diagram of the transmission device provided by the embodiment of the present application. As Figure 5 shown, the transmission device provided by this embodiment includes:

[0258] A receiving module 210, 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;

[0259] A sending module 220, configured to send a second message to the terminal.

[0260] Optionally, the sending module 220 is further configured to:

[0261] Send configuration parameters of the first signal to the terminal;

[0262] The configuration parameters of the first signal include at least one of the following:

[0263] Information of a candidate first signal;

[0264] Candidate beam combinations of the first transmission mode.

[0265] Optionally, the sending module 220 is further configured to:

[0266] Send configuration parameters of the first message to the terminal;

[0267] The configuration parameters of the first message include at least one of the following:

[0268] Preamble information for random access;

[0269] Random access opportunity RO resource information.

[0270] Optionally, the sending module 220 is further configured to:

[0271] Send the configuration parameters of the first transmission mode to the terminal;

[0272] The configuration parameters of the first transmission mode include at least one of the following:

[0273] The triggering information of the first transmission mode;

[0274] The beam combination of the first transmission mode;

[0275] The number of ports corresponding to the beam combination;

[0276] The port identifier corresponding to the beam combination;

[0277] 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;

[0278] The precoding information corresponding to the beam combination and the resource mapping information corresponding to the precoding information.

[0279] Optionally, the configuration parameters of the first transmission mode are carried by at least one of the following:

[0280] Master information block MIB message, system information block SIB message, radio resource control RRC, media access control unit MACCE message, downlink control information DCI message.

[0281] Optionally, the first message is carried in the RO, RO combination, preamble, or preamble combination corresponding to Msg1 in the random access procedure;

[0282] The first message is carried in the uplink data of Msg3 in the random access procedure;

[0283] The first message is carried in the preamble, preamble combination, RO, RO combination, or uplink data corresponding to MsgA in the random access procedure.

[0284] Optionally, the first message further includes at least one of the following: the measurement result, the beam combination of transmit diversity.

[0285] Optionally, the sending module 220 is further configured to:

[0286] Send a confirmation message to the terminal, where the confirmation message is used to indicate agreement or disagreement with the first transmission mode.

[0287] Optionally, the confirmation message is sent via a random access message Msg2, Msg4, or MsgB, or a downlink message after the random access procedure.

[0288] Optionally, the confirmation message includes: third indication information, where the third indication information is used to indicate that the terminal reports at least one of the measurement result and the beam combination for diversity transmission, or is used to indicate the transmission mode of the second message.

[0289] Optionally, the sending module 220 is further configured to:

[0290] Send a physical downlink control channel PDCCH to the terminal, where the PDCCH carries second indication information;

[0291] The second indication information is used to indicate that the terminal receives the second message according to the first transmission mode; or,

[0292] The second indication information is used to indicate receiving the second message according to the same transmission mode as the second indication information.

[0293] 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, multiplexing.

[0294] The device in this embodiment can be used to execute each process in the foregoing method embodiment of the network-side device. Its specific implementation process and technical effect are similar to those in the method embodiment of the network-side device. For details, reference can be made to the detailed introduction in the method embodiment of the network-side device, which will not be elaborated here.

[0295] The transmission device in the embodiment 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 a chip. The electronic device can be a terminal or other devices other than the terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0296] The transmission device provided in the embodiment of the present application can implement Figures 2 to 3 each process implemented by the method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0297] Such as Figure 6As shown in the figure, an embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602. A program or instruction that can run on the processor 601 is stored on the memory 602. For example, when the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, each step of the above transmission method embodiment is implemented, and the same technical effect can be achieved. When the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, each step of the above transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0298] An embodiment of the present application further provides a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement the steps in the method embodiment as Figure 2 shown. This terminal embodiment corresponds to the above terminal-side method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment, and the same technical effect can be achieved. Specifically, Figure 7 It is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0299] The terminal 700 includes, but is not limited to, at least some components such as 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 a processor 710.

[0300] Those skilled in the art can understand that the terminal 700 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 710 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 7 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements, which will not be elaborated here.

[0301] It should be understood that in the embodiments of the present application, the input unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042. The graphics processor 7041 processes the image data of static pictures or videos obtained by an image capturing 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, for example, a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. The 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 a joystick, which will not be elaborated here.

[0302] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 701 may transmit it to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network-side device. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0303] The memory 709 can be used to store software programs or instructions as well as 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. Among them, the first storage area may store an operating system, application programs 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 (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 709 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0304] The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor may not be integrated into the processor 710 either.

[0305] Among them, the radio frequency unit 701 is used to send 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;

[0306] The radio frequency unit 701 is further used to receive a second message sent by the network-side device in the first transmission mode.

[0307] Optionally, the radio frequency unit 701 is specifically used for:

[0308] Based on the measurement result, determine the first transmission mode;

[0309] When it is determined to use the first transmission mode, send the first message to the network-side device.

[0310] Optionally, the device further includes:

[0311] A processing module, configured to obtain configuration parameters of a first signal;

[0312] Based on the configuration parameters of the first signal, measure the first signal;

[0313] The configuration parameters of the first signal include at least one of the following:

[0314] Information of a candidate first signal;

[0315] A candidate beam combination of the first transmission mode.

[0316] Optionally, the radio frequency unit 701 is specifically configured to:

[0317] Based on the configuration parameters of the first message, send the first message to the network-side device; the configuration parameters of the first message include at least one of the following:

[0318] Preamble information for random access;

[0319] Random access opportunity RO resource information.

[0320] Optionally, the first message is carried in an RO, an RO combination, a preamble, or a preamble combination corresponding to Msg1 in the random access process;

[0321] The first message is carried in the uplink data of Msg3 in the random access process;

[0322] The first message is carried in a preamble, a preamble combination, an RO, an RO combination, or uplink data corresponding to MsgA in the random access process.

[0323] Optionally, the first message further includes at least one of the following: the measurement result, a beam combination for transmit diversity.

[0324] Optionally, the radio frequency unit 701 is further configured to:

[0325] After sending the first message to the network-side device, receive an acknowledgment message sent by the network-side device, where the acknowledgment message is used to indicate agreement or disagreement with the first transmission mode.

[0326] Optionally, the acknowledgment message is sent through a random access message Msg2, Msg4, or MsgB or a downlink message after the random access process.

[0327] Optionally, the confirmation message includes: third indication information, where the third indication information is used to indicate at least one of the measurement result reported by the terminal and the beam combination for diversity transmission, or is used to indicate the transmission mode of the second message.

[0328] Optionally, the radio frequency unit 701 is specifically configured to:

[0329] Receive the second message using the first transmission mode based on a predefined rule or a configuration parameter of the first transmission mode.

[0330] Optionally, the configuration parameter of the first transmission mode includes at least one of the following:

[0331] The triggering information of the first transmission mode;

[0332] The beam combination of the first transmission mode;

[0333] The number of ports corresponding to the beam combination;

[0334] The port identifier corresponding to the beam combination;

[0335] 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;

[0336] The precoding information corresponding to the beam combination and the resource mapping information corresponding to the precoding information.

[0337] Optionally, the configuration parameter of the first transmission mode is determined by at least one of the following:

[0338] Predefined rule, first indication information;

[0339] The first indication information is carried by at least one of the following:

[0340] 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.

[0341] Optionally, the radio frequency unit 701 is specifically configured to:

[0342] Monitor the Physical Downlink Control Channel (PDCCH) and obtain second indication information;

[0343] Receive the second message based on the second indication information.

[0344] Optionally, the second indication information is used to indicate that the terminal receives the second message according to the first transmission mode; or,

[0345] The second indication information is used to indicate receiving the second message according to the same transmission mode as the second indication information.

[0346] Optionally, the time-frequency resources and beam for monitoring the PDCCH are determined based on the resources used for the first message.

[0347] 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, multiplexing.

[0348] It can be understood that the implementation processes of the various implementation manners mentioned in this embodiment can refer to the relevant descriptions of Method Embodiment XXX, and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0349] This embodiment of the present application further provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the steps of the method embodiment as Figure 3 shown. This embodiment of the network-side device corresponds to the above-mentioned network-side device method embodiment. The various implementation processes and implementation manners of the above method embodiment can all be applied to this embodiment of the network-side device, and can achieve the same technical effects.

[0350] Specifically, this embodiment of the present application further provides a network-side device. As Figure 8 shown, 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. The antenna 81 is connected to the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent and sends it to the radio frequency device 82. The radio frequency device 82 processes the received information and then sends it out through the antenna 81.

[0351] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 83, and the baseband device 83 includes a baseband processor.

[0352] The baseband device 83 may include, for example, at least one baseband board, and multiple chips are provided on the baseband board. As Figure 8 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call the programs in the memory 85 and execute the operations of the network device shown in the above method embodiments.

[0353] The network-side device may further include a network interface 86, which is, for example, a Common Public Radio Interface (CPRI).

[0354] Specifically, the network-side device 800 according to the embodiments of the present application further includes: instructions or programs stored in the memory 85 and executable on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute Figure 5 the methods executed by the modules shown, and achieves the same technical effects. To avoid repetition, they will not be elaborated here.

[0355] The embodiments of the present application further provide a readable storage medium, on which programs or instructions are stored. When the programs or instructions are executed by a processor, the various processes of the above-described transmission method embodiments are implemented, and the same technical effects can be achieved. To avoid repetition, they will not be elaborated here.

[0356] Wherein, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0357] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described transmission method embodiments, and the same technical effects can be achieved. To avoid repetition, they will not be elaborated here.

[0358] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[0359] The embodiments of the present application further provide 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-described transmission method embodiments, and the same technical effects can be achieved. To avoid repetition, they will not be elaborated here.

[0360] The embodiments of the present application further provide a communication system, including: a terminal and a network-side device. The terminal can be used to execute the steps of the above-described transmission method, and the network-side device can be used to execute the steps of the above-described transmission method.

[0361] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such 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 reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0362] From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0363] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A transmission method, characterized in that including: 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, characterized in that, 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, characterized in that, 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, characterized in that 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, characterized in that 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, characterized in that, 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, characterized in that The acknowledgment message is sent through the random access messages Msg2, Msg4 or MsgB or the downlink message after the random access process.

9. The method according to claim 8, characterized in that 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, characterized in that, 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 triggering 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 Generation parameters of the reference signal sequence corresponding to the beam combination, and time-frequency resource mapping information of the reference signal sequence; Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

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, characterized in that, 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, characterized in that, Including: The network side device receives a first message sent by the terminal, and the first message is sent by the terminal based on the measurement result of the first signal; The first message includes 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 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, characterized in that, The method further includes: The network side device sends 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, characterized in that, The method further includes: The network side device sends 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 time-frequency resource mapping information of the reference signal sequence; Precoding information corresponding to the beam combination and resource mapping information corresponding to the precoding information.

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, Media Access Control Element MAC CE message, Downlink Control Information DCI message.

22. The method according to any one of claims 17-21, characterized in that 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, characterized in that 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, characterized in that, 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, characterized in that 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, characterized in that 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, characterized in that, 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, characterized in that 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, characterized in that, Including: A sending module, configured to send a first message to a network side device based on the 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, characterized in that, Including: A receiving module, configured to receive 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 reporting information of a first transmission mode; A sending module, configured to send a second message to the terminal.

31. A terminal, characterized in that, Including 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, characterized in that, It includes a processor and a memory, and the memory stores programs or instructions that can run on the processor. When the programs or instructions are executed by the processor, the steps of the transmission method described in any one of claims 17 to 27 are implemented.

33. A readable storage medium, characterized in that, Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the transmission method described in any one of claims 1 to 16 is implemented, or the steps of the transmission method described in any one of claims 17 to 27 are implemented.

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