CN115175243A - Communication method and communication device - Google Patents

Abstract

The application provides a communication method and a communication device, wherein a terminal device determines the repetition times of a Physical Uplink Shared Channel (PUSCH), and sends the PUSCH on a first antenna port according to the repetition times of the PUSCH, and correspondingly, a network device sends a Random Access Response (RAR) message, and receives the PUSCH on the first antenna port according to the repetition times of the PUSCH and scheduling information contained in the RAR message, wherein the PUSCH is scheduled by the Random Access Response (RAR) message, and the repetition times of the PUSCH corresponds to the first antenna port. The method and the device realize repeated transmission of the PUSCH in the random access stage, improve the PUSCH transmission efficiency of the UE, and avoid extra access delay caused by repeated retransmission.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and in particular, to a communication method and a communication apparatus.

Background

In a wireless communication system, random access is a mandatory process for a terminal device to establish a connection with a network device. In the random access process, after the terminal device successfully receives a Random Access Response (RAR) message sent by the network device, it needs to send a Physical Uplink Shared Channel (PUSCH) carrying a message 3 (Msg 3) to the network device. In coverage limited scenarios, the coverage needs to be increased by PUSCH repeated transmission. However, before the terminal device sends Msg3, the network device cannot accurately acquire the coverage condition of the terminal device and the capability of the terminal device, and how to implement PUSCH repeated transmission in the random access process becomes an urgent problem to be solved.

Disclosure of Invention

The communication method and the communication device provided by the embodiment of the application can more accurately realize repeated transmission of the PUSCH in the random access process and improve the PUSCH transmission efficiency.

In a first aspect, a communication method is provided, which may be performed by a terminal device or a chip configured in the terminal device. The method comprises the following steps: determining the repeated times of a PUSCH, wherein the PUSCH is scheduled by a RAR message, and the repeated times of the PUSCH correspond to a first antenna port; and sending the PUSCH on the first antenna port according to the repeated times of the PUSCH. In the scheme, the repeated times of the PUSCH correspond to the first antenna port, the terminal equipment can determine the repeated times of the PUSCH according to the network coverage condition and send the PUSCH on different antenna ports, so that repeated transmission of the PUSCH in a random access stage is realized, the PUSCH transmission efficiency of the UE is improved, and extra access delay caused by repeated retransmission is avoided.

The number of repetitions is the number of repetitions of the initial transmission. Through initial repeated transmission, under the scene of limited coverage, compared with multiple retransmissions in the HARQ process, the time delay of the terminal equipment accessing the network can be reduced.

The first antenna port is a DMRS antenna port. Optionally, the first antenna port is one of antenna port 0 and antenna port 3. Antenna port 3 and antenna port 0 are in different CDM groups and do not interfere with each other, and the probability that antenna port 3 is occupied is minimal.

And the repeated times of the PUSCH correspond to the first antenna port in a first corresponding relation. The correspondence includes the first correspondence, and various optional correspondences are provided in the embodiments of the present application.

Optionally, the corresponding relationship includes a corresponding relationship between at least two antenna ports and at least two repetition times, where the at least two antenna ports correspond to the at least two repetition times one to one.

Optionally, the corresponding relationship includes a corresponding relationship between two antenna ports and at least three repetition times, where the at least three repetition times include repetition time 1 and at least two repetition times greater than 1, the repetition times corresponding to the two antenna ports are different, the at least two repetition times greater than 1 correspond to the same antenna port of the two antenna ports, and the repetition time 1 corresponds to the other antenna port of the two antenna ports. By adopting the corresponding relation, the network equipment only needs to detect two antenna ports, which is beneficial to reducing the blind detection complexity of the network equipment.

Optionally, the correspondence includes that DMRS antenna port 0 corresponds to repetition number 1.

In one possible implementation manner, the terminal device determines the repetition number of the PUSCH according to the repetition number information, and the repetition number of the PUSCH is less than or equal to the first repetition number indicated by the repetition number information. That is, the number of PUSCH repetitions selected by the terminal device is less than or equal to the number of repetitions configured by the network device through the repetition number information. Because the bandwidth of the preamble is lower than the downlink measurement bandwidth, the measurement accuracy cannot be guaranteed, and the repetition times predicted by the UE through downlink measurement are more accurate than the repetition times predicted by the network device through random access preamble measurement.

Before transmitting the PUSCH on the first antenna port, further comprising: and determining the first antenna port according to the repeated times of the PUSCH and the corresponding relation.

Optionally, the repetition number information is information included in SIB1 or information included in downlink control information DCI, where the DCI is DCI scheduling RAR.

Optionally, the repetition number information is row index information of a TDRA table included in the RAR message, where the TDRA table includes a numerical value of a time domain start symbol and a numerical value of a time domain symbol number, and the TDRA table further includes a numerical value whose repetition number is greater than 1. The determining the number of repetitions of the PUSCH according to the repetition number information includes: and determining the repeated times of the PUSCH according to the repeated times information and the TDRA table.

Optionally, the TDRA table does not include a value with a PUSCH mapping type of type B. The number of the PUSCH symbols of type B is less, the performance is poorer in a scene needing coverage enhancement, and more PUSCH repeated transmission is needed to ensure the transmission performance.

Optionally, before determining the number of repetitions of the PUSCH, the method further includes: receiving configuration information of the TDRA table, wherein the configuration information comprises information indicating the number of repetitions corresponding to a row index of the TDRA table.

Optionally, when the first repetition number is 1, the repetition number of the PUSCH is 1. It should be noted that the number of repetitions is 1, which is equivalent to 1 transmission; or when the first repetition number is N, the repetition number of the PUSCH is 1 or N, where N is an integer greater than 1, for example, N is 2,4,8, or 16; alternatively, when the first repetition number is N, the repetition number of the PUSCH is 1 or M or N, where M is an integer greater than 1 and less than N, for example, N and M are 4 and 2,8 and 2, 16 and 2,8 and 4, 16 and 4, or 16 and 8, respectively.

Optionally, the determining the number of repetitions of the PUSCH according to the repetition number information includes: and when the first repetition time is greater than 1 and Reference Signal Received Power (RSRP) is less than or equal to a threshold value, the repetition time of the PUSCH is greater than 1.

Optionally, the determining the number of repetitions of the PUSCH according to the repetition number information includes: and when the first repetition time is greater than 1 and the maximum transmission power of the terminal equipment is less than the transmission power required by the correct reception of the PUSCH, the repetition time of the PUSCH is greater than 1.

In another possible implementation manner, the terminal device determines the number of repetitions of the PUSCH according to the antenna port information and the correspondence, where the antenna port information indicates the first antenna port. In the implementation mode, the network device can configure the corresponding relation between the antenna port and the repetition times according to different coverage requirements, and the implementation is flexible.

Before determining the number of repetitions of PUSCH, the method further includes: receiving antenna port information, wherein the antenna port information indicates the first antenna port.

In a second aspect, a communication method is provided, which may be performed by a network device or a chip configured in the network device. The network device may be an access network device, or may be a network unit that implements a corresponding function of the access network device. The method comprises the following steps: sending an RAR message, wherein the RAR message comprises scheduling information of a PUSCH; and receiving the PUSCH on a first antenna port according to the repeated times of the PUSCH and the scheduling information, wherein the repeated times of the PUSCH correspond to the first antenna port. The scheme realizes repeated transmission of the PUSCH in the random access stage, improves the PUSCH transmission efficiency of the UE, and avoids extra access delay caused by repeated retransmission.

In one possible implementation, before receiving the PUSCH on the first antenna port, the method further includes: and determining the repetition times of the PUSCH according to the first antenna port and the corresponding relation, wherein the repetition times of the PUSCH are less than or equal to the first repetition times indicated by the repetition time information, and the corresponding relation comprises a first corresponding relation that the repetition times of the PUSCH correspond to the first antenna port. The predicted repetition times of the UE through downlink measurement are more accurate than the predicted repetition times of the network equipment through random access preamble measurement.

Optionally, before receiving the PUSCH on the first antenna port, the method includes: determining the first antenna port, wherein the first antenna port is one of X candidate antenna ports and is an antenna port corresponding to the detected demodulation reference signal (DMRS) of the PUSCH, and X is a positive integer. When the first repetition number is 1, the X candidate antenna ports include only antenna port 0; alternatively, when the first repetition number is greater than 1, the X candidate antenna ports include at least antenna port 0 and antenna port 3.

Since the first repetition number estimated by the network device is greater than or equal to the repetition number of the PUSCH determined by the terminal device, the network device needs to determine X candidate antenna ports according to the first repetition number; then, blindly detecting DMRSs corresponding to the X candidate antenna ports; determining a first antenna port according to the detected DMRS; finally, acquiring the repeated times of the PUSCH sent by the UE; and receiving the PUSCH on the first antenna port according to the repeated times of the PUSCH. The X candidate antenna ports respectively correspond to at least more than two repetition times, which is beneficial to enabling the UE to select the repetition times more flexibly.

In another possible implementation manner, before the sending the RAR message, the method further includes: transmitting antenna port information, wherein the antenna port information indicates the first antenna port; before receiving the PUSCH on a first antenna port according to the number of repetitions of the PUSCH and the scheduling information, the method includes: and determining the repeated times of the PUSCH according to the first antenna port and the corresponding relation, wherein the corresponding relation comprises a first corresponding relation that the repeated times of the PUSCH correspond to the first antenna port. In the implementation mode, the network device can configure the corresponding relation between the antenna port and the repetition times according to different coverage requirements, and the implementation is flexible. In addition, the network device only needs to detect the configured candidate antenna port according to the corresponding relation between the configured antenna port and the repetition times, so that the receiving complexity of the network device can be reduced.

In a third aspect, a communication method is provided, which may be performed by a terminal device or a chip configured in the terminal device. The method comprises the following steps: receiving SIB1, wherein the SIB1 contains configuration information indicating a first PRACH; sending the first PRACH, wherein the first PRACH is used for requesting PUSCH transmission with the repetition number larger than 1; receiving a RAR message, wherein the RAR message comprises a response message of the first PRACH, and the RAR message comprises scheduling information of a PUSCH; and sending the PUSCH according to the scheduling information. By the method, under the condition that the coverage of the terminal equipment is limited, the network equipment can more accurately configure the repeated times of the PUSCH, improve the PUSCH transmission efficiency of the terminal equipment and avoid extra access time delay caused by repeated retransmission; under the condition that the coverage of the terminal equipment is not limited, the network equipment can only configure transmission once, so that extra resource waste is avoided.

Optionally, the RAR message includes row index information of a TDRA table.

With reference to the first aspect, the sending the PUSCH according to the RAR message includes: determining the repeated times of the PUSCH according to the row index information and the TDRA table; and sending the PUSCH according to the repeated times of the PUSCH.

In a fourth aspect, a communication method is provided that may be performed by a network device or a chip configured in a network device. The network device may be an access network device, or may be a network unit that implements a corresponding function of the access network device. The method comprises the following steps: sending SIB1, wherein the SIB1 contains configuration information indicating a first PRACH; receiving the first PRACH, wherein the first PRACH is used for requesting PUSCH transmission with the repetition number larger than 1; sending a RAR message, wherein the RAR message comprises a response message of the first PRACH, and the RAR message comprises scheduling information of a PUSCH; and receiving the PUSCH according to the scheduling information. By the scheme, the network equipment can configure the repeated times of the PUSCH more accurately and improve the PUSCH transmission efficiency.

In a fifth aspect, a communication device is provided, which comprises various means or units for performing the method of any one of the above possible implementations of the first aspect or the third aspect.

In a sixth aspect, a communication device is provided, which comprises means or units for performing the method of any of the possible implementations of the second or fourth aspect.

In a seventh aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to cause the communication device to perform the method of any of the possible implementations of the first aspect or the third aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a transceiver and/or an antenna. Alternatively, the communication device may be a terminal device or a chip configured in the terminal device.

In an eighth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to cause the communication device to perform the method of any of the possible implementations of the second aspect or the fourth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a transceiver and/or an antenna. Alternatively, the communication device may be a network device or a chip configured in the network device.

A ninth aspect provides a terminal device that may implement the method in any one of the possible implementations of the first aspect or the third aspect. Alternatively, the terminal device may be a chip (such as a communication chip, etc.) or a user equipment, and the method may be implemented by software, hardware, or by executing corresponding software through hardware.

In one possible implementation, the terminal device includes a processor and a memory; the processor is configured to support the terminal device to perform corresponding functions in any one of the possible implementation methods of the first aspect or the third aspect; the memory is used for storing instructions and/or data. Optionally, the terminal further comprises a radio frequency circuit and an antenna.

In another possible implementation manner, the terminal device includes a processing apparatus and a transceiver unit. The processing device comprises a processor and a memory, and is configured to perform actions implemented internally by the terminal device in any one of the possible implementation methods of the first aspect or the third aspect; the receiving and sending unit comprises a radio frequency circuit and an antenna and is used for executing actions of sending to the outside or receiving from the outside of the terminal equipment.

In yet another possible implementation, the terminal device includes a processor and a transceiver. The processor is configured to enable the terminal device to perform the method in any one of the possible implementations of the first aspect or the third aspect. When the terminal device is a chip, the transceiver may be an input-output unit, such as an input-output circuit or an input-output interface.

In yet another possible implementation manner, the terminal device may include a unit module that performs corresponding actions in any one of the possible implementation methods of the first aspect or the third aspect.

A tenth aspect provides a network device, which may implement the method in any possible implementation manner of the second aspect or the fourth aspect. Alternatively, the network device may be a chip (such as a baseband chip, or a communication chip, etc.) or a base station device, and the method may be implemented by software, hardware, or by hardware executing corresponding software.

In one possible implementation, the network device includes a processor and a memory. The processor is configured to enable a network device to perform the method of any one of the possible implementations of the second aspect or the fourth aspect; the memory is used for storing instructions and/or data. Optionally, the network device further includes a radio frequency unit and an antenna.

In another possible implementation manner, the network device includes a baseband unit and a transceiving unit. The baseband unit is configured to perform actions implemented internally by a network device in any one of the possible implementation methods of the second aspect or the fourth aspect; the receiving and sending unit is used for executing the action of sending or receiving to or from the outside by the network equipment.

In yet another possible implementation, the network device includes a processor and a transceiver. The processor is configured to enable a network device to perform the method of any one of the possible implementations of the second aspect or the fourth aspect. When the network device is a chip, the transceiver may be an input-output unit, such as an input-output circuit or an input-output interface.

In yet another possible implementation manner, the network device may include a unit module that performs corresponding actions in any one of the possible implementation methods of the second aspect or the fourth aspect.

In an eleventh aspect, a communication unit is provided, which may implement part of the functionality of a network device.

In one possible implementation, the communication unit is a radio frequency unit. The radio frequency unit comprises radio frequency functions and/or bottom layer functions in a physical layer. The radio frequency unit may include a unit module for performing corresponding actions in any one of the possible implementation methods of the second aspect or the fourth aspect.

In yet another possible implementation, the communication unit is a distributed unit. And the distributed unit RLC layer, the MAC layer and/or the physical layer have high-layer functions. The distributed unit may comprise unit modules for performing the corresponding actions in any of the possible implementation methods of the second or fourth aspects.

In a twelfth aspect, there is provided a computer-readable storage medium storing a computer program or instructions which, when executed, implement the method of any of the possible implementations of the first or third aspects.

In a thirteenth aspect, there is provided a computer readable storage medium storing a computer program or instructions which, when executed, implement the method of any of the possible implementations of the second or fourth aspects.

In a fourteenth aspect, a processor is provided, comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of any one of the above aspects or any possible implementation of the aspect. Alternatively, the processor is a chip, the input circuit is an input pin, the output circuit is an output pin, and the processing circuit is a transistor, a gate circuit, a flip-flop, various logic circuits, and/or the like.

In a fifteenth aspect, a computer program product is provided, the computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any of the possible implementations of the first or third aspect.

In a sixteenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any one of the possible implementations of the second or fourth aspect.

Drawings

FIG. 1 is a schematic diagram of a communication system of the present application;

fig. 2A is a flow chart of random access provided in the present application;

fig. 2B is a flow chart of another random access provided by the present application;

fig. 2C is a further random access flow chart provided herein;

fig. 3 is a flow chart of a communication method provided herein;

FIG. 4A is a schematic illustration of a determination of the number of repetitions provided herein;

FIG. 4B is a schematic illustration of yet another embodiment of determining the number of repetitions provided herein;

FIG. 4C is a schematic illustration of yet another embodiment of determining the number of repetitions provided herein;

FIG. 4D is a schematic illustration of yet another embodiment of determining the number of repetitions provided herein;

fig. 5A is a schematic diagram of a corresponding relationship provided in the present application;

fig. 5B is a schematic diagram of another corresponding relationship provided in the present application;

fig. 5C is a schematic diagram of another correspondence relationship provided in the present application;

fig. 6 is a flow chart of yet another communication method provided herein;

FIG. 7 is a schematic block diagram of a communication device provided herein;

FIG. 8 is a schematic block diagram of a network device provided herein;

fig. 9 is a schematic structural diagram of a terminal device provided in the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The method and apparatus provided in the embodiments of the present application may be applied to various communication systems, such as Long Term Evolution (LTE), fifth generation (5th generation, 5g), new Radio (NR), wireless fidelity (WiFi), third generation partnership project (3 rd generation partnership project,3 gpp) -related wireless communication, or other wireless communication that may occur in the future.

Fig. 1 is a schematic diagram of a communication system suitable for use in the present application. The system 100 includes at least one network device, such as the network device 110 shown in FIG. 1; the system 100 may also include at least one terminal device, such as terminal device 120 shown in FIG. 1. The network device 110 and the terminal device 120 may communicate via a wireless link to exchange information. It is to be understood that the network device and the terminal device may also be referred to as communication devices.

The network device is a network side device with wireless transceiving function. For example, the network device may be a base station (base station), an evolved NodeB (eNodeB), a next generation NodeB (gNB) in a 5G mobile communication system, a Transmission Reception Point (TRP), a base station for 3GPP subsequent evolution, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and the like. The network device may include one or more co-sited or non co-sited transmitting and receiving points. As another example, a network device may include a Centralized Unit (CU), a Distributed Unit (DU), or a CU and a DU. In this way, part of the functionality of the radio access network equipment may be implemented by a plurality of network functional entities. These network functional entities may be network elements in a hardware device, or may be software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform). As another example, in the vehicle to evolution (V2X) technology, the network device may be a Road Side Unit (RSU). The multiple network devices in the communication system may be base stations of the same type or base stations of different types. The base station may communicate with the terminal device, and may also communicate with the terminal device through the relay station. In the embodiment of the present application, the communication device for implementing the function of the network device may be a network device, or a network device having the function of a base station part, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.

The terminal device is a user-side device with a wireless transceiving function, and may be a fixed device, a mobile device, a handheld device (e.g., a mobile phone), a wearable device, a vehicle-mounted device, or a wireless apparatus (e.g., a communication module, a modem, or a chip system, etc.) built in the above-mentioned device. The terminal equipment is used for connecting people, objects, machines and the like, and can be widely used in various scenes, such as: cellular communication, device-to-device (D2D) communication, in V2X communication, machine-to-machine/machine-type communication (M2M/MTC) communication, internet of things (IoT), virtual Reality (VR), augmented Reality (AR), industrial control (industrial control), unmanned driving (self driving), remote medical (remote medical), smart grid (smart grid), smart furniture, smart office, smart wearing, smart transportation, smart city (smart city), unmanned aerial vehicle, robot, and the like. Illustratively, the terminal device may be a handheld terminal in cellular communication, a communication device in D2D, an internet of things device in MTC, a monitoring camera in intelligent transportation and smart cities, or a communication device on an unmanned aerial vehicle, etc. A terminal device may sometimes be referred to as a User Equipment (UE), a user terminal, a user equipment, a subscriber unit, a subscriber station, a terminal, an access station, a UE station, a remote station, a mobile device, or a wireless communication device, among others. For convenience of description, the terminal device is described with UE as an example in this application.

Before the method of the embodiment of the present application is introduced, a Random Access (RA) procedure is introduced. The random access procedure supports 2 types: a 4-step (4-step) RA type and a 2-step (2-step) RA type. The 2 types all support contention-based random access (CBRA).

As shown in fig. 2A, the CBFA process for 4-step RA includes 4 steps: step 1, UE sends a random access preamble carried by a Physical Random Access Channel (PRACH), namely message 1 (Msg 1) transmission; step 2, the network device sends a Random Access Response (RAR) message carried by a Physical Downlink Shared Channel (PDSCH), that is, message 2 (Msg 2) transmission; step 3, the UE sends the Msg3 carried by the PUSCH, namely Msg3 transmission; step 4, the network device sends a contention resolution (contention resolution) message carried by the PDSCH, that is, message 4 (Msg 4) transmission.

As shown in fig. 2B, the CBFA process for 2-step RA includes 2 steps: step 1, UE sends random access preamble and PUSCH carried by PRACH, namely message A (MsgA) transmission; and step 2, the network equipment sends a contention resolution message carried by the PDSCH, namely message B (MsgB) transmission. However, if the network device only receives the preamble in MsgA but does not receive the PUSCH in MsgA, the network device may initiate the fallback procedure. As shown in fig. 2C, the CBFA fallback (fallback) procedure for 2-step RA includes 4 steps: step 1, UE sends a random access preamble and a PUSCH carried by PRACH, namely MsgA transmission; step 2, the network equipment sends a rollback RAR message carried by the PDSCH, namely MsgB transmission; step 3, the UE sends the Msg3 carried by the PUSCH, namely Msg3 transmission; and 4, the network equipment sends a contention resolution message carried by the PDSCH, namely Msg4 transmission.

The RAR message includes uplink Grant (UL Grant) information, which may be referred to as RAR UL Grant. The fallback RAR may also be referred to as a fallback indication (fallback indication) message, and the fallback RAR includes UL Grant information and may be referred to as a fallback RAR UL Grant. The RAR UL Grant and the fallback RAR UL Grant can be used for scheduling a PUSCH carrying the Msg3, and the Msg3 carries the identification information of the UE. For convenience of description, RAR will be exemplified in the embodiment of the present application, but it should be understood that the RAR may be an RAR in a 4-step RA procedure or a fallback RAR in a 2-step RA procedure. Similarly, the RAR UL Grant may be an RAR UL Grant in a 4-step RA procedure, or a fallback RAR UL Grant in a 2-step RA procedure.

In the current 5G NR system, the RAR UL Grant includes a content field (content field) as shown in table one, wherein the PUSCH Time domain resource allocation information indicates a row index of a Time Domain Resource Allocation (TDRA) table. As shown in table two, the current TDRA table includes a PUSCH mapping type, K2, a starting symbol S and a symbol number L. The PUSCH mapping type includes mapping type a and mapping type B. The initial symbol S of the PUSCH mapping type a can only start from 0, and the value of the symbol number L is greater than or equal to 4 and less than or equal to 14. The starting symbol S of the PUSCH mapping type B may be 0 to 13, the value of l is greater than or equal to 1, and less than or equal to 14. K2 indicates the number of slots spaced for RAR UL Grant and scheduled PUSCH transmission. A symbol (symbol) is a short name of a time domain symbol, and may also be referred to as an Orthogonal Frequency Division Multiplexing (OFDM) symbol. It should be noted that the time domain symbol may also be named in combination with other multiple access methods, and the embodiment of the present invention is not limited thereto. The time domain symbol length may be different for different subcarrier spacings.

Table one

Table two

As shown in table one and table two, the RAR UL Grant does not include the PUSCH repeated transmission indication field. Therefore, when the UE is in a coverage limited scenario, the PUSCH carrying Msg3 cannot increase coverage by repeated transmission. At this time, the network device may schedule the UE with multiple PUSCH retransmissions (transmission), but may cause a large access delay; or, the UE cannot access the network at all, affecting normal communication.

The method provided by the embodiment of the application is explained below with reference to the accompanying drawings. It is to be understood that, in the method embodiments described below, only the network device and the terminal device are taken as examples of execution subjects, and the network device mentioned in the method embodiments may be executed by a chip configured in the network device instead, and the terminal device may be executed by a chip configured in the terminal device instead. The terminal device and the network device may be embodied in various forms as mentioned above. In addition, although the embodiments of the present invention have been described in the context of a network device and a terminal device, it is to be understood that different functions in the method may be executed by different network devices, for example, different functions of a base station may be implemented by different network units, different operations in the embodiment may be implemented by different network units that implement different functions of the base station, and certainly, different operations may also be implemented by a certain network unit, which is not limited in the embodiments of the present invention, and these or this network unit are collectively referred to as a network device. For convenience of description, the terminal device is described in this application by taking UE as an example.

Fig. 3 is a schematic flow chart of a communication method provided in an embodiment of the present application. The steps shown in fig. 3 will be explained below. It should be noted that the step indicated by the dotted line in fig. 3 is optional and will not be described in detail later.

S310, the network equipment sends first information. Accordingly, the UE receives the first information. The first information is system information or downlink control information.

Optionally, the first information is a system information block 1 (system information block 1, sib1). SIB1 is a Radio Resource Control (RRC) signaling. SIB1 may also be referred to as Remaining Minimum System Information (RMSI). The system information is information at a cell level, which is information that a network device sends to a plurality of UEs in a cell.

Optionally, the first information is Downlink Control Information (DCI) of the scheduling RAR. The DCI is DCI format 1_0 (DCI format 1 _0), and a Cyclic Redundancy Check (CRC) of the DCI is scrambled by a random access radio network temporary identifier (RA-RNTI).

S320, the network equipment sends an RAR message. Accordingly, the UE receives the RAR message. The RAR message includes scheduling information of a PUSCH, that is, the PUSCH is scheduled by the RAR message.

The scheduling information of the PUSCH is information included in the RAR UL Grant. As shown in table one, the scheduling information of the PUSCH includes PUSCH frequency domain resource allocation information and PUSCH time domain resource allocation information. The PUSCH time domain resource allocation information indicates a row index of the TDRA table, that is, the RAR message contains row index information of the TDRA table.

S330, the UE determines a repetition number (repetition number) of the PUSCH. Wherein the number of repetitions of the PUSCH corresponds to a first antenna port.

Optionally, the number of repetitions is the number of repetitions of an initial transmission (initial transmission). Through initial repeated transmission, in a scene with limited coverage, compared with multiple times of retransmission in a Hybrid Automatic Repeat Request (HARQ) process, the time delay of the UE accessing the network can be reduced.

In a first possible implementation manner, the UE determines the repetition number of the PUSCH according to the repetition number information, where the repetition number of the PUSCH is less than or equal to the first repetition number indicated by the repetition number information. In this embodiment of the application, the first repetition number is a repetition number indicated by the repetition number information, and is not described in detail later.

Optionally, the repetition number information is information included in the first information, that is, the first information includes the repetition number information. For example, the information on the number of repetitions is information included in SIB1. For example, the repetition number information is information included in DCI scheduling RAR. When the first information does not include the repetition number information, the repetition number of the PUSCH is 1.

Optionally, the repetition number information is row index information of a TDRA table included in the RAR message. The TDRA table includes a value of a time domain start symbol and a value of a time domain symbol number, and further includes a value of a repetition number greater than 1. For example, the TDRA table includes a repetition number of 2,4,8, or 16.

Illustratively, the TDRA table includes all values of table two, and the TDRA table further includes a value identifying the number of repetitions. The TDRA table has 4 bits (bit) of row index information, and can indicate up to 16 row indexes. As shown in table three, the TDRA table is added with the column of the number of repetitions on the basis of table two.

Table III

Line index	PUSCH mapping type	K2	S	L	Number of repetitions
						1	Type A	j		0	14	2
2	Type A	j		0	12								4
						3	Type A	j		0	10	2
4	Type B	j		2	10								2
						5	Type B	j		4	10	4
6	Type B	j		4	8								8
						7	Type B	j		4	6	16
8	Type A	j+1	0	14	2
						9	Type A	j+1	0	12	4
10	Type A	j+1	0	10	8
						11	Type A	j+2	0	14	2
12	Type A	j+2	0	12	4
						13	Type A	j+2	0	10	16
14	Type B	j		8	6							4
						15	Type A	j+3	0	14	2
16	Type A	j+3	0	10	4

Illustratively, the TDRA table includes the partial values of table two, and the TDRA table further includes a value identifying the number of repetitions. The TDRA table has 4 or 3 bits of row index information, and may indicate up to 16 or 9 row indexes. As shown in table four, the TDRA table includes the value of the PUSCH mapping type in table two as type a, and does not include the value of the PUSCH mapping type in table two as type B. The number of the PUSCH symbols of type B is less, the performance is poorer in a scene needing coverage enhancement, and more PUSCH repeated transmission is needed to ensure the transmission performance.

Table four

Line index	PUSCH mapping type	K2	S	L	Number of repetitions
						1	Type A	j		0	14	2
2	Type A	j		0	12								4
						3	Type A	j		0	10	2
4	Type A	j+1	0	14	2
						5	Type A	j+1	0	12	4
6	Type A	j+1	0	10	8
						7	Type A	j+2	0	14	4
8	Type A	j+2	0	12	8
						9	Type A	j+2	0	10	16
10	Type A	j+3	0	14	8
						11	Type A	j+3	0	10	16

Optionally, the TDRA table is a predefined table or a table pre-stored in the UE or the network device.

Optionally, the TDRA table is indicated by configuration information of the TDRA table. The configuration information includes information indicating the number of repetitions corresponding to a row index of the TDRA table. For example, the configuration information indicates one or more of: the row index x corresponds to 2 repetitions, the row index y corresponds to 4 repetitions, or the row index z corresponds to 8 repetitions, etc., where x, y, and z are positive integers not greater than 16 or 9. Optionally, the first information includes configuration information of a TDRA table. For example, the configuration information is information contained in SIB1. For example, the configuration information is information included in DCI scheduling RAR. When the first information does not include the configuration information of the TDRA table, the number of repetitions of the PUSCH is 1.

Optionally, the determining, by the UE, the number of repetitions of the PUSCH according to the repetition number information includes: the UE determines the number of repetitions of the PUSCH according to the number of repetitions information (i.e., the row index information of the TDRA table) and the TDRA table. For example, the TDRA table is table three or table four, the row index information indicates a row index of 2, and the row index of 2 corresponds to 4 repetitions, then the UE may determine that the number of repetitions of the PUSCH is less than or equal to 4.

Optionally, the determining, by the UE, the number of repetitions of the PUSCH according to the repetition number information includes: when the first repetition number is 1, the repetition number of the PUSCH is 1. Alternatively, when the first number of repetitions is N, the number of repetitions of the PUSCH is 1 or N, where N is an integer greater than 1, such as 2,4,8, or 16. Alternatively, when the first repetition number is N, the number of repetitions of PUSCH is 1 or M or N, where N is an integer greater than 2 and M is an integer greater than 1 and less than N, e.g., N and M are 4 and 2,8 and 2, 16 and 2,8 and 4, 16 and 4, or 16 and 8, respectively. Alternatively, when the first repetition number is N, the PUSCH repetition number is one of at least 4 repetition numbers, the at least 4 repetition numbers including 1 and N, wherein N is an integer greater than 3, such as N is 8, the at least 4 repetition numbers are 1,2,4 and 8, such as N is 16, the at least 4 repetition numbers are 1,2,4 and 16, or, the at least 4 repetition numbers are 1,2,8 and 16, or, the at least 4 repetition numbers are 1,4,8 and 16. It should be noted that "the first repetition number" may be replaced with "the repetition number indicated by the repetition number information" or "the repetition number corresponding to the row index indicated by the row index information of the TDRA table". It should be noted that the number of repetitions is 1, which is equivalent to 1 transmission; the number of repetitions is N, which is equivalent to N repeated transmissions. If the repetition number of the PUSCH is always equal to the repetition number indicated by the repetition number information, the UE cannot select according to the channel condition measured by the UE, which may cause resource waste due to too large repetition number configured by the network device, or may not ensure the PUSCH performance due to too small repetition number configured by the network device. In the embodiment of the present application, the UE may select the number of repetitions of the PUSCH from a plurality of repetitions (for example, the UE selects from 1 and N, or the UE selects from 1, m, and N), and the transmission efficiency of the PUSCH is higher than that of the PUSCH.

Optionally, the determining, by the UE, the number of repetitions of the PUSCH according to the repetition number information includes: and the UE determines the repeated times of the PUSCH according to the repeated times information and the channel state. For example, as shown in fig. 4A, when the repetition number indicated by the repetition number information is greater than 1 and the Reference Signal Received Power (RSRP) is less than or equal to the threshold, the repetition number of the PUSCH is greater than 1. The threshold value may be network device configured. For example, the UE obtains a threshold value according to the first information, where the first information includes information indicating the threshold value. For example, as shown in fig. 4B, when the first repetition number is N and RSRP is greater than a first threshold, the repetition number of the PUSCH is 1; when the first repetition time is N and the RSRP is less than or equal to a first threshold value but greater than a second threshold value, the repetition time of the PUSCH is M; and when the first repetition time is N and the RSRP is less than or equal to the second threshold value, the repetition time of the PUSCH is N. Wherein N is an integer greater than 2, and M is an integer greater than 1 and less than N. The first and second threshold values may be network device configured. For example, the UE acquires the first and second threshold values based on first information, the first information including information indicating the first and second threshold values. Optionally, the RSRP is measured by the UE according to a Synchronization Signal Block (SSB) or a channel state information reference signal (CSI-RS). The RSRP may also be replaced by a Reference Signal Received Quality (RSRQ), which is described with reference to the RSRP and is not described herein again.

Optionally, the determining, by the UE, the number of repetitions of the PUSCH according to the repetition number information includes: and the UE determines the repeated times of the PUSCH according to the repeated times information and the transmitting power. For example, when the first repetition number is greater than 1 and the maximum transmission power of the UE is less than the transmission power required for correct reception of the PUSCH, the repetition number of the PUSCH is greater than 1. Illustratively, the UE determines the number of repetitions of the PUSCH according to the repetition number information and the power difference value. The power difference (denoted as Δ) is the transmit power required for correct reception of PUSCH minus the maximum transmit power of the UE. The transmission power required for the PUSCH to correctly receive may also be the total power expected to be received by the network device. And after the UE calculates the delta, the number of times of repetition can be obtained according to a certain rule. An alternative rule is a rule with at least two rows included in table five, where M1, M2, and M3 are threshold values, which may be, for example, values of 2,4,6, etc., respectively, and the unit is dB. As shown in fig. 4C, the first repetition number is 8, and the UE may determine that the repetition number of the PUSCH is 1,2,4, or 8 according to different power difference threshold values. For coverage limited UEs, the transmit power typically needs to be full. If the path loss is large, the UE full power transmission may still not reach the receiving power expected by the network device, and the signal quality may be improved by repeating the transmission. Therefore, the method for determining the repetition times is more accurate than the direct judgment of the network equipment.

Table five

Power difference delta (dB)	Number of repetitions
		<＝0	1
0<Δ<＝M1	2
		M1<Δ<＝M2	4
M2<Δ<＝M3	8

Optionally, the determining, by the UE, the number of repetitions of the PUSCH according to the repetition number information includes: the UE determines the number of repetitions of the PUSCH based on the repetition number information (i.e., the row index information of the TDRA table), the TDRA table, and the channel state/transmission power. As shown in fig. 4D, the UE acquires the row index in the TDRA table according to the RAR message and acquires the repetition number according to the row index. Further, the UE determines the number of repetitions of the PUSCH according to the channel state or the transmission power, which may specifically refer to the above description and is not described herein again. For example, the UE acquires the TDRA table as table three or table four according to the configuration information of the TDRA table, and the UE acquires the row index of table three or table four as 2 according to the RAR message and the row index of 2 corresponds to 4 repetitions, so that the UE determines that the number of repetitions of the PUSCH is 1 or 4. Further, the UE may determine 1 or 4 according to the channel state or the transmission power.

And the PUSCH repetition number selected by the UE is less than or equal to the repetition number configured by the network equipment through the repetition number information. Compared with the method that the network equipment directly configures the PUSCH repetition times, the method has the following advantages that the UE selects the PUSCH repetition times: firstly, the predicted repetition times of the UE through downlink measurement are more accurate. In the process of initialization receiving, the network device can only perform uplink measurement according to the random access preamble, and the bandwidth of the network device is lower than the bandwidth of downlink measurement, so that the measurement accuracy cannot be guaranteed. For example, the downlink measurement bandwidth may be a bandwidth of a Physical Broadcast Channel (PBCH), and includes 20 PRBs; the downlink measurement bandwidth may also be a Tracking Reference Signal (TRS) bandwidth, which may be 10MHz. While the bandwidth of preamble transmission may be 6 RPBs, which is relatively small. And secondly, the first information is sent to a plurality of UEs in the cell, and some UEs have good channel quality and some UEs have poor channel quality. If the processing is repeated according to the Msg3, the UE with good channel quality is unnecessarily repeated, more wireless resources are wasted, and energy consumption is not saved.

In a second possible implementation manner, the UE determines the number of repetitions of the PUSCH according to the antenna port information and the correspondence, where the antenna port information indicates the first antenna port. Wherein the correspondence includes a first correspondence of the number of repetitions of the PUSCH and the first antenna port. The implementation mode can configure the corresponding relation between the antenna port and the repetition times according to different covering requirements, and is flexible to implement. For example, a corresponding relationship between two antenna ports and two repetition times may be configured, a corresponding relationship between two antenna ports and two or more repetition times may be configured, and a corresponding relationship between 3 antenna ports and 3 repetition times may be configured. In addition, the implementation method can also reduce the number of antenna ports which need to be detected by the network device in a blind manner, that is, reduce the receiving complexity of the network device. The network device only needs to detect the configured candidate antenna port according to the corresponding relation between the configured antenna port and the repetition times.

The corresponding relationship is the corresponding relationship a in S340, which is not described herein again. For example, when the antenna port information indicates antenna port 0, the UE determines that the number of repetitions of the PUSCH is 1 according to the correspondence shown in fig. 5A. For example, when the antenna port information indicates the antenna port P, the UE determines that the number of repetitions of the PUSCH is N according to the correspondence shown in fig. 5A. For example, when the antenna port information indicates antenna port 1, the UE determines that the number of repetitions of the PUSCH is 4 according to the correspondence shown in fig. 5C.

S340, the UE determines an antenna port of the PUSCH. In the embodiment of the present application, an antenna port of the PUSCH is referred to as a first antenna port.

An antenna port (antenna port), referred to as a port for short. The antenna port may be a physical port, such as a physical antenna, corresponding to a set of radio frequency links for transmitting signals into the transmission space; alternatively, the antenna port may be a logical port, such as formed by a physical antenna through virtualization. Resources belonging to the same antenna port experience the same channel, i.e. the channel of one symbol on the same antenna port can be deduced from the channel of another symbol.

Optionally, the first antenna port is an antenna port of a PUSCH DMRS. For example, there are 12 antenna port numbers of the PUSCH DMRS, denoted as antenna port 0 to antenna port 11. The antenna ports for the reference signals are determined by frequency domain resources, time domain resources and/or code domain resources.

Optionally, the first antenna port is one of two antenna ports. The two antenna ports are antenna port 0 and antenna port P, where P is a positive integer less than 12, e.g., P is 3. At this time, the UE determines that the first antenna port is antenna port 0 or antenna port P. Preferably, P is the largest antenna port index. For example, when the PUSCH DMRS employs a type (type) -DMRS and is 1 symbol, P is 3. For example, when the PUSCH DMRS is a type-one DMRS and is 2 symbols, P is 7. For example, when the PUSCH DMRS is 1 symbol and is a type two DMRS, P is 5. For example, when the PUSCH DMRS is 1 symbol and uses a type two DMRS, P is 11. The antenna port with the largest index and the antenna port 0 are in different Code Division Multiplexing (CDM) groups, and do not interfere with each other, and the probability that the antenna port with the largest index is occupied is the smallest. In the embodiment of the present application, the antenna port P is described in this paragraph, and details are not described in other places.

Optionally, the first antenna port is one of at least three antenna ports. For example, the first antenna port is one of antenna port 0, antenna port 3, and antenna port 1/2. For example, the first antenna port is one of antenna port 0, antenna port 1, antenna port 2, and antenna port 3.

In a first possible implementation manner (corresponding to the first possible implementation manner in step S330), the UE determines the first antenna port according to the number of repetitions of the PUSCH and the correspondence. Wherein the corresponding relationship comprises a first corresponding relationship between the repetition times of the PUSCH and the first antenna port. For example, the number of repetitions of the PUSCH is 1, and the UE determines that the first antenna port is antenna port 0 according to the correspondence shown in fig. 5A or 5B. For example, the number of repetitions of the PUSCH is 2, and the UE determines that the first antenna port is antenna port P according to the correspondence shown in fig. 5A or 5B. For example, the number of repetitions of the PUSCH is 4, and the UE determines that the first antenna port is antenna port 1 according to the correspondence shown in fig. 5C.

Optionally, the corresponding relationship is a predefined relationship or a relationship pre-stored in the UE or the network device.

Optionally, the correspondence is indicated by the correspondence information. Optionally, the first information includes information indicating the correspondence. For example, the information is information contained in SIB1. For example, the information is information included in DCI scheduling RAR.

Optionally, the corresponding relationship includes a corresponding relationship between at least two antenna ports and at least two repetition times, the first antenna port is one of the at least two antenna ports, the repetition time of the PUSCH is one of the at least two repetition times, and the first corresponding relationship is one of a plurality of relationships included in the corresponding relationship. The corresponding relationship includes: antenna port 0 corresponds to repetition number 1. For example, the corresponding relationship is a corresponding relationship a, a corresponding relationship B, or a corresponding relationship C.

The corresponding relationship a includes a corresponding relationship between at least two antenna ports and at least two repetition times, wherein the at least two antenna ports correspond to the at least two repetition times one to one. For example, as shown in fig. 5A, the first antenna port is one of an antenna port 0 and an antenna port P, and the correspondence relationship includes: antenna port 0 corresponds to 1 transmission and antenna port P corresponds to N repeated transmissions, where N is an integer greater than 1, e.g., N is 2,4,8, or 16. For example, the first antenna port is one of three antenna ports, and the correspondence relationship includes: antenna port 0 corresponds to 1 transmission, antenna port 3 corresponds to 2 retransmissions, and antenna port 1/2 corresponds to 4 retransmissions. For example, as shown in fig. 5C, the first antenna port is one of four antenna ports, and the corresponding relationship includes: antenna port 0 corresponds to 1 transmission, antenna port 3 corresponds to 2 repeated transmissions, antenna port 1 corresponds to 4 repeated transmissions, and antenna port 2 corresponds to 8 repeated transmissions.

The corresponding relationship B includes a corresponding relationship between at least two antenna ports and at least three repetition times, wherein the at least two antenna ports respectively correspond to different repetition times, and at least two of the at least three repetition times correspond to the same antenna port of the at least two antenna ports. Preferably, the corresponding relationship B includes a corresponding relationship between two antenna ports and at least three repetition times, where the at least three repetition times include repetition time 1 and at least two repetition times greater than 1, the repetition times corresponding to the two antenna ports are different, the at least two repetition times greater than 1 correspond to the same antenna port of the two antenna ports, and the repetition time 1 corresponds to another antenna port of the two antenna ports. For example, as shown in fig. 5B, the two antenna ports are an antenna port 0 and an antenna port P, and the correspondence relationship includes: antenna port 0 corresponds to 1 transmission and antenna port P corresponds to at least two repetition times greater than 1. For example, the antenna port P corresponds to repetition numbers 2 and 4, repetition numbers 2 and 8, repetition numbers 2 and 16, repetition numbers 4 and 8, repetition numbers 4 and 16, or repetition numbers 8 and 16. For example, the antenna port P corresponds to repetition numbers 2,4, and 8, repetition numbers 2,4, and 16, repetition numbers 2,8, and 16, or repetition numbers 4,8, and 16. For example, antenna port P corresponds to repetition times of 2,4,8, and 16. By adopting the method of the corresponding relation B, the network equipment only needs to detect two antenna ports, which is beneficial to reducing the blind detection complexity of the network equipment.

The correspondence relationship C includes: antenna port 0 corresponds to 1 transmission, antenna port P corresponds to a TDRA table or the number of repetitions in a TDRA table, and the number of repetitions included in the TDRA table is greater than 1.

In a second possible implementation manner (corresponding to the second possible implementation manner in step S330), the UE acquires an antenna port of the PUSCH according to the antenna port information.

Optionally, the first information includes antenna port information. For example, the antenna port information is information contained in SIB1. For example, the antenna port information is information included in DCI scheduling RAR. When the first information does not include the antenna port information, the first antenna port is antenna port 0. Optionally, the RAR message includes antenna port information.

Optionally, when the antenna port information indicates the antenna port 0, the antenna port of the PUSCH is the antenna port 0; or, when the antenna port information indicates the antenna port P, the antenna port of the PUSCH is the antenna port P.

S350, the UE sends the PUSCH. Accordingly, the network device receives the PUSCH.

And the UE sends the PUSCH on the first antenna port according to the repeated times of the PUSCH. When the number of repetitions of the PUSCH is N (N is an integer greater than 1), the UE transmits N PUSCHs on N transmission occasions (transmission occasion). For Type A PUSCH repetition, each transmission opportunity corresponds to 1 uplink time slot scheduled by RAR; for Type B PUSCH repetition, each transmission occasion may correspond to a partial OFDM symbol in 1 RAR-scheduled uplink slot. The Redundancy Versions (RV) of the N PUSCHs may be the same, or the RV of at least 2 of the N PUSCHs is different, or in the manner of RV cycle, for example, when N =8, the RV version cycle sequence is 0,2,3,1,0,2,3,1. For example, PUSCH is 1 transmission and the first antenna port is antenna port 0, then the UE sends one PUSCH on antenna port 0. For example, PUSCH is 2,4,8, or 16 transmissions, the first antenna port is antenna port P, then the UE sends 2,4,8, or 16 PUSCH on antenna port P and on 2,4,8, or 16 transmission occasions. For example, PUSCH is 4 transmissions, the first antenna port is antenna port 1, then the UE sends 4 PUSCHs on antenna port 1 and on 4 transmission occasions. For example, PUSCH is 8 transmissions and the first antenna port is antenna port 2, then the UE sends 8 PUSCHs on antenna port 1 and on 8 transmission occasions.

And the network equipment receives the PUSCH on the first antenna port according to the repeated times and the scheduling information of the PUSCH. And the network equipment determines the frequency domain resources of the PUSCH according to the PUSCH frequency domain resource allocation information included in the scheduling information, and receives the PUSCH on the frequency domain resources of the PUSCH. When the repetition number of the PUSCH is 1, the network equipment receives 1 PUSCH on 1 transmission opportunity; or, when the number of repetitions of the PUSCH is N, the network device receives N PUSCHs on N transmission occasions. For example, PUSCH is 1 transmission and the first antenna port is antenna port 0, then the network device receives one PUSCH on antenna port 0 and on the frequency domain resources of PUSCH. For example, PUSCH is 2,4,8 or 16 transmissions, the first antenna port is antenna port P, then the network device receives 2,4,8 or 16 PUSCHs on the antenna port P, on the frequency domain resources of the PUSCH, and on 2,4,8 or 16 transmission occasions. For example, PUSCH is 4 transmissions, the first antenna port is antenna port 1, then the network device receives 4 PUSCHs on antenna port 1, on frequency domain resources of PUSCH, and on 4 transmission occasions. For example, PUSCH is 8 transmissions, the first antenna port is antenna port 2, then the network device receives 8 PUSCHs on antenna port 1, on frequency domain resources of PUSCH, and on 8 transmission occasions.

In a first possible implementation manner (corresponding to the first possible implementation manner in step S330), before the network device receives the PUSCH on the first antenna port, the method includes: and the network equipment determines the repeated times of the PUSCH according to the first antenna port and the corresponding relation, wherein the repeated times of the PUSCH are less than or equal to the first repeated times indicated by the repeated times information, and the corresponding relation comprises the repeated times of the PUSCH and the first corresponding relation of the first antenna port. The information of the repetition times refers to the description in step S330, and the corresponding relationship refers to the description in step S340, which are not described again here. For example, the first antenna port is antenna port 0, and the UE determines that the number of repetitions of the PUSCH is 1 according to the correspondence shown in fig. 5A or 5B. For example, the first antenna port is an antenna port P, and the UE determines that the number of repetitions of the PUSCH is N according to the correspondence shown in fig. 5A. For example, the first antenna port is antenna port 1, and the UE determines that the number of repetitions of the PUSCH is 4 according to the correspondence shown in fig. 5C. For example, the first antenna port is an antenna port P, and the UE determines the number of repetitions of the PUSCH as the first number of repetitions according to the correspondence shown in fig. 5B.

Optionally, before receiving the PUSCH on the first antenna port, the method further includes: determining a first antenna port, wherein the first antenna port is one candidate antenna port of X candidate antenna ports and is an antenna port corresponding to the detected PUSCH DMRS, and X is an integer greater than 1. Optionally, the network device correlates DMRS sequences on the X candidate antenna ports, and an antenna port corresponding to a DMRS with a largest correlation peak is a first antenna port. The specific PUSCH DMRS detection algorithm depends on network equipment implementation, and the embodiment of the present invention is not limited.

Optionally, the network device determines X candidate antenna ports according to the repetition number information. When the first repetition number is 1, the X candidate antenna ports include only one antenna port, for example, antenna port 0; or, when the first repetition number is greater than 1, the X candidate antenna ports include at least two antenna ports, for example, an antenna port 0 and an antenna port P, where the antenna port P is an antenna port corresponding to the first repetition number. For example, the correspondence is correspondence a in S340 (as shown in fig. 5A), the repetition number information indicates N times of repeated transmission, and then the X candidate antenna ports include antenna port 0 and antenna port P, and antenna port P is an antenna port corresponding to the N times of repeated transmission indicated by the repetition number information. For example, the corresponding relationship is the corresponding relationship a in S340 (as shown in fig. 5C), and the repetition number information indicates 8 times of repeated transmission, then the X candidate antenna ports include antenna port 0, antenna port 1, antenna port 2, and antenna port 3, where antenna port 3 is an antenna port corresponding to the 8 times of repeated transmission indicated by the repetition number information. For example, the correspondence is a correspondence B in S340 (as shown in fig. 5B), the repetition number information indicates one of at least two repetition numbers greater than 1, and then the X candidate antenna ports include antenna port 0 and antenna port P.

Optionally, the repetition number information is row index information of a TDRA table included in the RAR message, and before step S310, the network device determines the TDRA table first; then, the network device determines configuration information of the TDRA table included in the first information according to the TDRA table.

Optionally, before sending the information about the number of repetitions, the network device further includes: the network device determines a first number of repetitions. The network device can estimate the number of times the Msg3 PUSCH needs to be repeated according to the received preamble power. For example, the expected received power of the base station is P0, the actually estimated preamble power is P1, and when P0-P1 is greater than the threshold value M1, the repetition number 2 is selected; when P0-P1 is larger than the threshold value M2, selecting the repetition time 4; when P0-P1 is larger than a threshold value M3, selecting the repetition times to be 8; when P0-P1 is greater than the threshold M4, the number of repetitions 16 is selected. Wherein M1< M2< M3< M4, and M1, M2, M3, and M4 are positive integers.

Since the first repetition number estimated by the network device is greater than or equal to the repetition number of the PUSCH determined by the UE, the network device needs to determine X candidate antenna ports according to the first repetition number; then, blindly detecting DMRSs corresponding to the X candidate antenna ports; determining a first antenna port according to the detected DMRS; finally, acquiring the repeated times of the PUSCH sent by the UE; and receiving the PUSCH on the first antenna port according to the repeated times of the PUSCH. The X candidate antenna ports respectively correspond to at least more than two repetition times, which is beneficial to enabling the UE to select the repetition times more flexibly. Because the UE can measure RSRP or path loss according to the downlink PBCH, TRS, etc., the measurement bandwidth is larger than the bandwidth of the uplink preamble, and the measured path loss is more accurate. The UE can adaptively select the repetition times according to the measurement result, so that the selected repetition times are more accurate, unnecessary repetition of the UE can be reduced, and the energy consumption is saved.

In a second possible implementation manner (corresponding to the second possible implementation manner in step S330), before step S310, the network device determines the first antenna port; then, the network device determines, according to the first antenna port, antenna port information included in the first information.

In various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic. The various numbers or serial numbers involved in the above processes are merely used for convenience of description and should not be construed as limiting the implementation processes of the embodiments of the present application in any way. For example, S310 and S320 may be performed simultaneously, or S310 may be performed before S320. For example, S330 and S340 may be performed simultaneously, or S330 or S340 may be a previous step.

In the embodiment of the application, the repetition times of the PUSCH correspond to the first antenna port, the terminal equipment can determine different PUSCH repetition times according to the network coverage condition, and send the PUSCH on different antenna ports, so that repeated transmission of the PUSCH in a random access stage is realized, the PUSCH transmission efficiency of the UE is improved, and extra access delay caused by repeated retransmission is avoided. In one possible implementation manner, the PUSCH repetition number selected by the terminal device is less than or equal to the repetition number configured by the network device through the repetition number information. Because the bandwidth of the preamble is lower than the downlink measurement bandwidth, the measurement accuracy cannot be guaranteed, and the repetition times predicted by the UE through downlink measurement are more accurate than the repetition times predicted by the network device through random access of the preamble measurement. In another possible implementation manner, the terminal device determines the number of repetitions of the PUSCH according to the antenna port information and the correspondence. In the implementation mode, the network device can configure the corresponding relation between the antenna port and the repetition times according to different coverage requirements, and the implementation is flexible.

Fig. 6 is a schematic flow chart of another communication method provided in the embodiments of the present application. The respective steps shown in fig. 6 will be explained below.

S610, the network device sends SIB1. Accordingly, the UE receives SIB1. The definition of SIB1 can be referred to the description of the embodiment shown in fig. 3, and is not described herein again.

SIB1 includes PRACH configuration information. The PRACH configuration information comprises time domain resource information of the PRACH, frequency domain resource information of the PRACH, random access preamble sequence information and the like.

The PRACH configuration information indicates time domain resources of the first PRACH, frequency domain resources of the first PRACH, and/or a preamble carried by the first PRACH. The first PRACH is used to request repeated transmission of the PUSCH scheduled for the RAR message. That is, the first PRACH is used to cover random accesses of restricted UEs.

Optionally, the PRACH configuration information further indicates a time domain resource of the second PRACH, a frequency domain resource of the second PRACH, and/or a preamble carried by the second PRACH. The second PRACH is not used to request PUSCH repetition transmission.

S620, the UE sends the first PRACH. Accordingly, the network device receives the first PRACH.

When the UE has PUSCH repeat transmission capability and the UE determines that the request repeat transmission of the PUSCH repeat transmission with the repeat number greater than 1, the UE sends a first PRACH. Optionally, the UE determines whether the request repetition number is greater than 1 according to RSRP. For example, when RSRP is less than or equal to the threshold, the UE determines to request PUSCH repeated transmission with a repetition number greater than 1. Optionally, SIB1 includes information indicating the threshold value. When the RSRP is less than or equal to a first threshold value but greater than a second threshold value, the UE determines to request PUSCH repeated transmission with the repeated times being M; and when the RSRP is smaller than a second threshold value, the UE determines to request PUSCH repeated transmission with the repeated number of N. Wherein N is an integer greater than 2, and M is an integer greater than 1 and less than N. Optionally, SIB1 contains information indicating the first and second threshold values.

When the network device detects the preamble sent by the UE on the first PRACH, the network device learns that the UE has PUSCH retransmission capability, and requests PUSCH retransmission with a repetition number greater than 1.

For a UE with PUSCH retransmission capability but without retransmission requirement, a second PRACH may be sent, and after a Radio Resource Control (RRC) connection is established, the UE reports the capability with PUSCH retransmission to the network device.

S630, the network device sends an RAR message. Accordingly, the UE receives the RAR message. The RAR message includes a response message for the first PRACH.

For a detailed description, reference may be made to the description in the embodiment shown in fig. 3, which is not repeated herein.

The network device decides the actual PUSCH repetition number, e.g. 1,2,4,8 or 16 etc. Optionally, the RAR message includes repetition number information, where the repetition number information indicates the PUSCH repetition number, that is, the network device notifies the UE of the PUSCH repetition number configured by the network device through the repetition number information carried in the RAR message. For example, the repetition number information is row index information of the TDRA table included in the RAR message, which may specifically refer to the description in the embodiment shown in fig. 3, and is not described herein again.

S640, the UE sends the PUSCH. Accordingly, the network device receives the PUSCH.

The UE sends the PUSCH according to the RAR message, and the method comprises the following steps: the UE determines the repeated times of the PUSCH according to the row index information and the TDRA table contained in the RAR message; and the UE sends the PUSCH according to the repeated times of the PUSCH. When the number of repetitions of the PUSCH is N (N is an integer greater than 1), the UE transmits N PUSCHs on N transmission occasions. Reference may be made to the description of the embodiment shown in fig. 3, which is not described herein again.

And the network equipment receives the PUSCH according to the repetition times and the scheduling information of the PUSCH. And the network equipment determines the frequency domain resource of the PUSCH according to the PUSCH frequency domain resource allocation information included in the scheduling information, and receives the PUSCH on the frequency domain resource of the PUSCH. When the repetition number of the PUSCH is 1, the network equipment receives 1 PUSCH on 1 transmission opportunity; or, when the number of repetitions of the PUSCH is N, the network device receives N PUSCHs on N transmission occasions. Reference may be made to the description in the embodiment shown in fig. 3, and details are not repeated here.

In the embodiment of the application, the network device may determine whether the UE has the capability of PUSCH retransmission and whether the UE requests PUSCH retransmission with a repetition number greater than 1 according to whether the UE selects the first PRACH. By the method, under the condition that the coverage of the UE is limited, the network equipment can more accurately configure the repeated times of the PUSCH, improve the PUSCH transmission efficiency of the UE and avoid extra access time delay caused by repeated retransmission; under the condition that the coverage of the UE is not limited, the network equipment can only configure one-time transmission, so that additional resource waste is avoided.

Fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application. It should be noted that the portion indicated by the dashed box in fig. 7 is optional, and will not be described in detail later.

The communication device 1000 includes one or more processors 1100. The processor 1100 may also be referred to as a processing unit, and may be used to perform internal processing of the apparatus and implement certain control processing functions. Optionally, processor 1100 includes instructions 1300. Alternatively, the processor 1100 may store data. The processor 1100 may be a general-purpose processor, a special-purpose processor, or the like. For example, at least one of the following is included: a baseband processor, a central processing unit, an applications processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, and/or a neural network processor, among others. The different processors may be stand-alone devices or may be integrated within one or more processors, e.g., on one or more application specific integrated circuits.

Optionally, communications apparatus 1000 includes one or more memories 1200 to store instructions 1400. Optionally, the memory 1200 may further store data therein. The processor and the memory may be provided separately or may be integrated together.

Optionally, the communication device 1000 may also include a transceiver 1500 and/or an antenna 1600. Among other things, the transceiver 1500 may be used to transmit information to and receive information from other devices. The transceiver 1500 may be referred to as a transceiving unit, a transceiver, a transceiving circuit, a transceiver, an input/output interface, etc. for implementing transceiving function of the communication device 1000 through the antenna 1600.

Optionally, the communication device 1000 may further include one or more of the following components: the wireless communication module, the audio module, the external memory interface, the internal memory, a Universal Serial Bus (USB) interface, the power management module, the antenna, the speaker, the microphone, the input/output module, the sensor module, the motor, the camera, or the display screen. These components may be hardware, software, or a combination of software and hardware implementations.

The processor 1100 executes instructions (sometimes also referred to as computer programs or code) stored by the communication device 1000, i.e. the instructions stored by the communication device may be executed on the processor 1100, so that the communication device 1000 performs the methods described in the above embodiments. Optionally, the instructions are instructions 1300 in the processor 1100, or the instructions are instructions 1400 in the memory.

In an implementation manner, the communication apparatus 1000 may be configured to implement the method corresponding to the terminal device in the embodiment of the application, and specific functions refer to descriptions in the embodiment described above, which are not described herein again. Illustratively, the communication apparatus 1000 includes a processor 1100, and the processor 1100 is configured to execute a computer program or instructions, so that the method corresponding to the terminal device in the above-mentioned application embodiments is executed. Illustratively, the processor 1100 is configured to determine a number of repetitions of a PUSCH, and the transceiver 1500 is configured to transmit the PUSCH on the first antenna port according to the number of repetitions of the PUSCH. The communication apparatus 1000 may be a terminal device or a chip configured in the terminal device.

In another implementation manner, the communication apparatus 1000 may be configured to implement the method corresponding to the network device in the embodiment of the application, and specific functions are described in the embodiment and are not described herein again. Illustratively, the communication apparatus 1000 includes a processor 1100, and the processor 1100 is configured to execute a computer program or instructions, so that the method corresponding to the network device in the above-mentioned application embodiments is executed. Illustratively, the processor 1100 is configured to determine a number of repetitions of a PUSCH, and the transceiver 1500 is configured to transmit a RAR message and to receive a PUSCH on the first antenna port. The communication apparatus 1000 may be a network device or a chip configured in a network device.

The processor 1100 and the transceiver 1500 described herein may be implemented on an Integrated Circuit (IC), an analog IC, a radio frequency integrated circuit (RFID), a mixed signal IC, an Application Specific Integrated Circuit (ASIC), a Printed Circuit Board (PCB), an electronic device, or the like. The communication apparatus implementing the present description may be a standalone device (e.g., a standalone integrated circuit, a mobile phone, etc.), or may be a part of a larger device (e.g., a module that can be embedded in other devices), and may refer to the foregoing description about the terminal device and the network device, which is not described herein again.

Fig. 8 is a simplified structural diagram of a network device according to an embodiment of the present application, for example, a simplified structural diagram of a base station. The network device 2000 may be applied to the system shown in fig. 1, and may perform the operation or the function of the network device in the foregoing method embodiment, which may be specifically referred to the description in the foregoing method embodiment and is not described herein again.

The network device 2000 includes: a processor 2101, a memory 2102, a radio frequency unit 2201 and an antenna 2202. The processor 2101 is also referred to as a processing unit and is used to support a network device to perform the functions of the network device in the above-described method embodiments. The processor 2101 may be one or more processors. The one or more processors may support radio access technologies of the same system, and may also support radio access technologies of different systems (e.g., LTE and NR). In one implementation, the processor 2101 is an integrated circuit such as one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip. The memory 2102, also referred to as storage unit, stores instructions (sometimes also referred to as computer programs or code) and/or data. The memory 2102 may be a single memory or a combination of a plurality of memories or storage elements. The memory 2102 and the processor 2101 may be located in the same chip or on different chips. The radio frequency unit 2201 may be one or more radio frequency units. The antenna 2202 is mainly used for transceiving radio frequency signals in the form of electromagnetic waves, for example, for the network device 2000 to transmit signals to or receive signals from a terminal device.

Optionally, the baseband unit 2100 (BBU) includes a processor 2101 and a memory 2102, and is mainly used for baseband processing of signals, managing radio resources, providing transmission management and interfaces, providing clock signals, and the like. Optionally, the BBU2100 may be formed by one or more boards, where the boards may jointly support a radio access network of a single access system (e.g., an LTE network), and may also respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The memory 2201 and the processor 2202 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

Optionally, the transceiver unit 2200 includes a radio frequency unit 2201 and an antenna 2202, and is mainly used for transceiving radio frequency signals and converting the radio frequency signals into baseband signals.

Optionally, the radio frequency unit 2201 is a Remote Radio Unit (RRU), and the RRU and the BBU may be physically disposed together or may be physically disposed separately, that is, a distributed base station.

Alternatively, the transceiving Unit 2100 may be an Active Antenna Unit (AAU), i.e. a hardware product that integrates rf functionality with an Antenna. The radio frequency unit 2201 in the AAU refers to a radio frequency module dedicated to the AAU, and has the same function as the RRU. Optionally, the AAU may also include partial baseband processing functions.

Alternatively, BBU2100 may be configured to perform actions described in the foregoing method embodiments that are implemented internally by a network device, and transceiver unit 2200 may be configured to perform actions described in the foregoing method embodiments that the network device transmits to or receives from a terminal device. Exemplarily, BBU2100 determines a number of repetitions of a PUSCH, and transceiving unit 2200 is configured to send a RAR message and is further configured to receive a PUSCH on the first antenna port. For a detailed description, reference is made to the above method embodiments, which are not repeated herein.

Fig. 9 is a simplified structural schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 3000 may be applied to the system shown in fig. 1, and performs the operation or the function of the terminal device in the foregoing method embodiment, which may be specifically referred to the description in the foregoing method embodiment, and is not described herein again.

The terminal device 3000 includes a processor 3100, a memory 3200, a radio frequency circuit 3300, and an antenna 3400. The processor 3100 is generally used for processing communication protocols and communication data, controlling terminals, executing instructions (which may also be referred to as computer programs or codes), processing data, and the like. The processor 3100 may also be referred to as a processing unit, a processing board, a processing module, a processing device, or the like. The memory 3200 is primarily used to store instructions (sometimes also referred to as computer programs or code) and data. The memory may also be referred to as a storage medium or a storage device, etc. The rf circuit 3300 is mainly used for converting baseband signals and rf signals and processing rf signals. The antenna 3400 is mainly used for transceiving radio frequency signals in the form of electromagnetic waves, for example, for the terminal device 3000 to transmit or receive signals to or from a network device. Optionally, the terminal device 3000 further includes an input/output device 3500, such as a touch screen, a display screen, a microphone, a keyboard, and the like, for receiving user input data and outputting data to the user. It should be noted that fig. 7 only shows one memory and one processor. In an actual end product, terminal device 3000 may include multiple processors and/or multiple memories.

Illustratively, the terminal device 3000 is a mobile phone. When the terminal device 3000 is powered on, the processor 3100 may read the software program stored in the memory 3200, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 3100 outputs a baseband signal to the radio frequency circuit 3300 after performing baseband processing on the data to be sent, and the radio frequency circuit 3300 sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna 3400 after performing radio frequency processing on the baseband signal. When data is transmitted to the terminal device 3000, the radio frequency circuit 3300 receives a radio frequency signal through the antenna 3400, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 3100, and the processor 3100 converts the baseband signal into data and processes the data.

In one implementation, the processor 3100 includes a baseband processor and a central processing unit, the baseband processor is mainly configured to process a communication protocol and communication data, and the central processing unit is mainly configured to control the entire terminal device 3000, execute a software program, and process data of the software program. The terminal device 3000 may include a plurality of baseband processors to accommodate different network systems, the terminal device 3000 may include a plurality of central processors to enhance its processing capability, and various components of the terminal device 3000 may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one implementation, processor 3100 and memory 3200 can be considered to be processing means 3600 for terminal device 3000. The processing device 3600 may be a chip. For example, the processing device 3600 may be a Field Programmable Gate Array (FPGA), a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a microcontroller (microcontroller unit, MCU), a programmable controller (PLD) or other integrated chip.

In one implementation, the radio frequency circuit 3300 and the antenna 3400 may be considered as a transceiving unit 3700 of the terminal device 3000. The transceiver unit 3700 may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device of the transceiver unit for implementing the receiving function may be regarded as the receiving unit, and a device of the transceiver unit for implementing the transmitting function may be regarded as the transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

The processing means 3600 may be configured to perform the actions implemented by the terminal device in the foregoing method embodiments, and the transceiving unit 3700 may be configured to perform the actions transmitted to or received from the network device by the terminal device in the foregoing method embodiments. Illustratively, the processing device 3600 determines a number of repetitions of a PUSCH, and the transceiving unit 3700 transmits the PUSCH on the first antenna port. For a detailed description, reference is made to the above method embodiments, which are not repeated herein.

The present application further provides a communication unit, which is a functional entity in a network device, and can implement a part of functions of the network device. The communication unit may be a network element in a hardware device, or may be a software function running on dedicated hardware, or a virtualization function instantiated on a platform (e.g., a cloud platform).

Optionally, the communication unit is a radio frequency unit. The radio frequency unit may include radio frequency functionality and/or sublayer functionality in the physical layer. The bottom layer functions in the physical layer include precoding, resource mapping, physical antenna mapping, and the like. It should be noted that, in the embodiments of the present application, the functional division between the upper layer and the lower layer in the physical layer is not limited.

Illustratively, the communication unit transmits a PDSCH carrying the RAR message, and receives the PUSCH on the first antenna port according to the number of repetitions of the PUSCH and scheduling information included in the RAR message. For a detailed description, reference is made to the above method embodiments, which are not repeated herein.

Exemplarily, the communication unit transmits a first PDSCH carrying a SIB1, where the SIB1 includes configuration information indicating a first PRACH; receiving a first PRACH, wherein the first PRACH is used for requesting PUSCH transmission with the repetition number larger than 1; sending a second PDSCH carrying an RAR message, wherein the RAR message comprises scheduling information of a PUSCH; the PUSCH is received according to the scheduling information. For a detailed description, reference is made to the above method embodiments, which are not repeated herein.

Optionally, the communication unit is a distributed unit DU. The DU may include a function of a Radio Link Control (RLC) layer, a function of a Medium Access Control (MAC) layer, and/or a partial function of a physical layer. Optionally, part of the functions of the physical layer are functions of higher layers in the physical layer, such as channel coding, scrambling, modulation, layer mapping, etc.

Illustratively, the communication unit determines the number of repetitions of the PUSCH and sends a RAR message to the radio unit. For a detailed description, reference is made to the above method embodiments, which are not repeated herein.

Optionally, the communication unit is a centralized unit CU. The DU may include RRC functions. Illustratively, the communication unit generates SIB1.

It is understood that, in the embodiment of the present application, a terminal device and/or a network device may perform some or all of the steps in the embodiment of the present application, and these steps or operations are merely examples, and the embodiment of the present application may also perform other operations or variations of various operations. Further, the various steps may be performed in a different order presented in the embodiments of the application, and not all operations in the embodiments of the application may be performed.

The present application also provides a computer-readable storage medium, which stores a computer program or instructions, and when the computer program or instructions are executed, the method executed by the network device or the terminal device in the foregoing method embodiments is implemented. Thus, the functions described in the above embodiments may be implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. The storage medium includes: a U disk, a removable hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The present application further provides a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method performed by the terminal device or the network device in any of the preceding method embodiments.

The application also provides a system which comprises the terminal equipment and the network equipment.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to execute the method performed by the terminal device or the network device according to any of the above method embodiments.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the division of the unit into only one logical functional division may be implemented in other ways, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. The shown or discussed mutual coupling, direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., a Solid State Disc (SSD)), among others.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

It should also be understood that the ordinal numbers such as "first", "second", etc., are used for distinguishing a plurality of objects, and are not used for limiting the size, content, sequence, timing, priority, importance, etc. of the plurality of objects. For example, the first PDSCH and the second PDSCH may be the same physical channel or different physical channels, and such names do not indicate differences in the amount of information, content, priority, importance, and the like between the two physical channels.

It should also be understood that in the present application, "when 8230a", "if" and "if" all refer to that the network element makes a corresponding processing under a certain objective condition, and are not time-limited, and do not require a certain judgment action when the network element is implemented, nor do they imply other limitations.

It is also understood that, in the present application, "at least one" means one or more, "a plurality" means two or more. "at least one item" or similar expressions refer to one or more item(s), i.e. any combination of these items, including any combination of single item(s) or plural item(s). For example, at least one (one) of a, b, or c, represents: a, b, c, a and b, a and c, b and c, or a and b and c.

It should also be understood that items appearing in this application similar to "include one or more of the following: the meaning of the expressions A, B, and C "generally means that the item may be any of the following, unless otherwise specified: a; b; c; a and B; a and C; b and C; a, B and C; a and A; a, A and A; a, A and B; a, A and C, A, B and B; a, C and C; b and B, B, B and C, C and C; c, C and C, and other combinations of A, B and C. The above description is made by taking 3 elements of a, B and C as examples of optional items of the item, when the expression "item includes at least one of the following: a, B, \8230;, and X ", i.e., with more elements in the expression, then the items to which the item can be applied can also be obtained according to the rules described above.

It should also be understood that the term "and/or" herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. For example, A/B, represents: a or B.

It should also be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (28)

1. A method of communication, comprising:

determining the repetition times of a Physical Uplink Shared Channel (PUSCH), wherein the PUSCH is scheduled by a Random Access Response (RAR) message, and the repetition times of the PUSCH correspond to a first antenna port;

and sending the PUSCH on the first antenna port according to the repeated times of the PUSCH.

2. The method of claim 1,

before determining the number of repetitions of the PUSCH, the method further includes:

receiving repetition number information;

the determining the number of repetitions of the PUSCH includes:

determining the repeated times of the PUSCH according to the repeated times information, wherein the repeated times of the PUSCH are less than or equal to the first repeated times indicated by the repeated times information;

before the sending the PUSCH on the first antenna port, the method further includes:

and determining the first antenna port according to the repetition times of the PUSCH and the corresponding relation, wherein the corresponding relation comprises a first corresponding relation that the repetition times of the PUSCH correspond to the first antenna port.

3. The method of claim 2, wherein the repetition number information is system information or downlink control information.

4. The method according to claim 2, wherein the repetition number information is row index information of a Time Domain Resource Allocation (TDRA) table included in the RAR message;

the determining the number of repetitions of the PUSCH according to the repetition number information includes:

determining the repeated times of the PUSCH according to the repeated times information and the TDRA table;

the TDRA table comprises a value of a time domain starting symbol and a value of a time domain symbol number, and the TDRA table further comprises a value of which the repetition time is more than 1.

5. The method of claim 4,

before determining the number of repetitions of the PUSCH, the method further includes:

receiving configuration information of the TDRA table, wherein the configuration information comprises information indicating the number of repetitions corresponding to a row index of the TDRA table.

6. The method according to any of claims 2 to 5, wherein the determining the number of repetitions of the PUSCH according to the repetition number information comprises:

when the first repetition number is 1, the repetition number of the PUSCH is 1; alternatively, the first and second electrodes may be,

when the first repetition number is N, the repetition number of the PUSCH is 1 or N, wherein N is an integer greater than 1; alternatively, the first and second liquid crystal display panels may be,

when the first repetition number is N, the repetition number of the PUSCH is 1 or M or N, wherein M is an integer greater than 1 and less than N.

7. The method of claim 6,

the N is 2,4,8 or 16; alternatively, the first and second electrodes may be,

n and M are 4 and 2,8 and 2, 16 and 2,8 and 4, 16 and 4, or 16 and 8, respectively.

8. The method according to any one of claims 2 to 7, wherein the determining the number of repetitions of the PUSCH according to the repetition number information comprises:

when the first repetition time is greater than 1 and the maximum transmission power of the terminal equipment is less than the transmission power required by the correct reception of the PUSCH, the repetition time of the PUSCH is greater than 1; alternatively, the first and second electrodes may be,

and when the first repetition time is greater than 1 and the Reference Signal Received Power (RSRP) is less than or equal to a threshold value, the repetition time of the PUSCH is greater than 1.

9. The method of claim 1,

before determining the number of repetitions of PUSCH, the method further includes:

receiving antenna port information, wherein the antenna port information indicates the first antenna port;

the determining the number of repetitions of the PUSCH includes:

and determining the repetition times of the PUSCH according to the antenna port information and a corresponding relation, wherein the corresponding relation comprises a first corresponding relation that the repetition times of the PUSCH correspond to the first antenna port.

10. The method according to any one of claims 2 to 9,

the corresponding relation comprises a corresponding relation between at least two antenna ports and at least two repetition times, wherein the at least two antenna ports correspond to the at least two repetition times one by one; alternatively, the first and second electrodes may be,

the corresponding relationship comprises a corresponding relationship between two antenna ports and at least three repetition times, wherein the at least three repetition times comprise repetition times 1 and at least two repetition times larger than 1, the repetition times corresponding to the two antenna ports are different, the at least two repetition times larger than 1 correspond to the same antenna port of the two antenna ports, and the repetition times 1 correspond to the other antenna port of the two antenna ports.

11. The method of claim 10, wherein the correspondence comprises: the demodulation reference signal DMRS antenna port 0 corresponds to the repetition number 1.

12. The method according to any of claims 1 to 11, wherein the number of repetitions is the number of repetitions of the initial transmission.

13. A method of communication, comprising:

sending a Random Access Response (RAR) message, wherein the RAR message comprises scheduling information of a Physical Uplink Shared Channel (PUSCH);

and receiving the PUSCH on a first antenna port according to the repeated times of the PUSCH and the scheduling information, wherein the repeated times of the PUSCH correspond to the first antenna port.

14. The method of claim 13,

before receiving the PUSCH on a first antenna port according to the number of repetitions of the PUSCH and the scheduling information, the method includes:

and determining the repetition times of the PUSCH according to the first antenna port and the corresponding relation, wherein the repetition times of the PUSCH are less than or equal to the first repetition times indicated by the repetition time information, and the corresponding relation comprises a first corresponding relation that the repetition times of the PUSCH correspond to the first antenna port.

15. The method of claim 14, wherein before sending the RAR message, the method further comprises:

and sending the repetition frequency information, wherein the repetition frequency information is system information or downlink control information.

16. The method of claim 14, wherein the repetition information is row index information of a Time Domain Resource Allocation (TDRA) table included in the RAR message, wherein the TDRA table comprises a value of a time domain start symbol and a value of a time domain symbol number, and wherein the TDRA table further comprises a value of a repetition greater than 1.

17. The method of claim 16, wherein before sending the RAR message, the method further comprises:

and transmitting configuration information of the TDRA table, wherein the configuration information comprises information indicating the repetition times corresponding to the row indexes of the TDRA table.

18. The method according to any one of claims 14 to 17,

the receiving the PUSCH on the first antenna port comprises:

determining the first antenna port, wherein the first antenna port is one candidate antenna port of X candidate antenna ports and is an antenna port corresponding to the detected demodulation reference signal (DMRS) of the PUSCH, and X is a positive integer.

19. The method of claim 18,

when the first repetition number is 1, the X candidate antenna ports include only one antenna port; alternatively, the first and second liquid crystal display panels may be,

when the first repetition number is greater than 1, the X candidate antenna ports include at least two antenna ports.

20. The method of claim 13,

before the sending the RAR message, the method further includes:

transmitting antenna port information, wherein the antenna port information indicates the first antenna port;

before receiving the PUSCH on a first antenna port according to the number of repetitions of the PUSCH and the scheduling information, the method includes:

and determining the repeated times of the PUSCH according to the first antenna port and the corresponding relation, wherein the corresponding relation comprises a first corresponding relation that the repeated times of the PUSCH correspond to the first antenna port.

21. The method according to any one of claims 14 to 20,

the corresponding relation comprises a corresponding relation between at least two antenna ports and at least two repetition times, wherein the at least two antenna ports correspond to the at least two repetition times one by one; alternatively, the first and second electrodes may be,

the corresponding relationship comprises a corresponding relationship between two antenna ports and at least three repetition times, wherein the at least three repetition times comprise repetition times 1 and at least two repetition times larger than 1, the repetition times corresponding to the two antenna ports are different, the at least two repetition times larger than 1 correspond to the same antenna port of the two antenna ports, and the repetition times 1 correspond to the other antenna port of the two antenna ports.

22. The method of claim 21, wherein the correspondence comprises: DMRS antenna port 0 corresponds to repetition number 1.

23. The method according to any of claims 13 to 22, wherein the number of repetitions is the number of repetitions of the initial transmission.

24. A communications apparatus, characterized in that the communications apparatus comprises a processor and a memory for storing a computer program or instructions, the processor being configured to execute the computer program or instructions in the memory such that the method of any of claims 1 to 12 is performed.

25. A communications apparatus, characterized in that the communications apparatus comprises a processor and a memory for storing a computer program or instructions, the processor being configured to execute the computer program or instructions in the memory such that the method of any of claims 13 to 23 is performed.

26. A computer-readable storage medium, in which a computer program or instructions for implementing the method of any one of claims 1 to 12 is stored.

27. A computer-readable storage medium, in which a computer program or instructions for implementing the method of any one of claims 13 to 23 is stored.

28. A computer program product, the computer program product comprising: computer program code which, when run by a computer, causes the computer to perform

The method of any one of claims 1 to 12, or the method of any one of claims 13 to 23.

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