A communication method, a terminal device and a network device, and a storage medium

Abstract

Embodiments of the present application provide a communication method, a terminal device and a network device, and a storage medium, aiming to realize repeated transmission between the terminal device and the network device, so as to improve the communication quality of a specific channel. One of the communication methods comprises: determining a target transmission scheme of a target channel, the target transmission scheme comprising at least one of a first transmission scheme and a second transmission scheme, wherein the target channel comprises a physical layer downlink shared channel carrying a random access process message 4, the first transmission scheme comprises single transmission, and the second transmission scheme comprises repeated transmission N times, wherein N is a positive integer; and transmitting data on the target channel according to the target transmission scheme.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, terminal equipment, network equipment, and storage medium. Background Technology

[0002] Traditional terrestrial networks cannot provide seamless coverage, especially in areas where base stations cannot be deployed, such as at sea, in deserts, or in the air. Satellite communication can solve these communication scenarios where base stations cannot be deployed. Satellite communication refers to communication conducted by terrestrial radio communication equipment using satellites as relays.

[0003] In satellite communication, the distance between satellites and the ground is far, the satellite's transmission power is low, and the reliability of the link between the satellite and the terminal equipment is low. It is necessary to enhance the reception performance of specific link channels, and how to enhance the reception performance of specific channels is a problem that needs to be solved. Summary of the Invention

[0004] This application provides a communication method, a terminal device, a network device, and a storage medium, with the aim of enabling repeated transmission between the terminal device and the network device to improve the communication quality of a specific channel.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] The first aspect of this application provides a communication method. This method can be executed by a communication device, or by a component (such as a circuit, chip, or chip system) configured in the communication device, or by a logic module or software capable of implementing all or part of the functions of the communication device. For example, the method is applied to a terminal device, and this application does not limit its application thereto. The following description uses a terminal device as an example. The method includes: determining a target transmission scheme for a target channel, the target transmission scheme including at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer; and transmitting data on the target channel according to the target transmission scheme.

[0007] In the above scheme, the terminal device can determine the target transmission scheme of the target channel, which includes the physical layer downlink shared channel carrying the random access procedure message 4. Thus, the terminal device can support the first transmission scheme or the second transmission scheme. The terminal device can use the first transmission scheme or the second transmission scheme to transmit on the physical layer downlink shared channel carrying the random access procedure message 4, thereby improving the communication quality of the channel.

[0008] In some possible implementations of the first aspect, the method further includes: sending first information to a network device; wherein the first information is used to instruct the terminal device to support a second transmission scheme for the target channel; or, the first information is used to request the network device to use the second transmission scheme for the target channel. In the above schemes, by reporting the first information to the network device, the network device can configure the second transmission scheme for the target channel according to the first information. Thus, the terminal device and the network device can use the second transmission scheme for repeated transmissions, improving the communication quality of the channel.

[0009] In some possible implementations of the first aspect, determining the target transmission scheme for the target channel includes: determining the target transmission scheme for the target channel according to a protocol; or, receiving first configuration information, wherein the first configuration information is used to configure the target transmission scheme used by the terminal device. In the above schemes, the terminal device determines the target transmission scheme for the target channel according to a protocol, which has the advantages of simplicity and ease of configuration. Network devices and terminal devices can interactively determine the target transmission scheme for the target channel. Therefore, the terminal device and network device can use either the first transmission scheme or the second transmission scheme for transmission, improving the communication quality of the channel.

[0010] In some possible implementations of the first aspect, determining the target transmission scheme for the target channel includes: receiving a first message from a network device, the first message including a first field and / or a second field; the first field indicating a first temporary wireless network identifier, the first temporary wireless network identifier corresponding to the first transmission scheme; and the second field indicating a second temporary wireless network identifier, the second temporary wireless network identifier corresponding to the second transmission scheme. In the above scheme, the network device and the terminal device can exchange the first message. By indicating different temporary wireless network identifiers through the fields carried in the first message, and then through the correspondence between the temporary wireless network identifiers and the transmission schemes, the network device can indicate the target transmission scheme for the target channel to the terminal device, which has the advantages of simplicity and ease of implementation.

[0011] In some possible implementations of the first aspect, the second field includes the second temporary wireless network identifier, or the second field includes offset value information between the second temporary wireless network identifier and the first temporary wireless network identifier, wherein the offset value information and the first temporary wireless network identifier are used to determine the second temporary wireless network identifier. In the above scheme, the second field can directly indicate the second temporary wireless network identifier, so that the terminal device can determine the second temporary wireless network identifier by parsing the second field. Alternatively, the second field can indicate offset value information, and the terminal device determines the second temporary wireless network identifier through the offset value information and the first temporary wireless network identifier. Embodiments of this application provide two methods of indicating the second temporary wireless network identifier, either directly or indirectly, to indicate the second temporary wireless network identifier to the terminal device.

[0012] In some possible implementations of the first aspect, the first message is sent via message 2Msg2 during the random access procedure. In the above scheme, sending the first message via message 2 simplifies the process of the network device instructing the terminal device on the target transmission scheme, allowing the terminal device to determine the first message via message 2.

[0013] In some possible implementations of the first aspect, determining the target transmission scheme for the target channel includes: receiving a first message from a network device, the first message including a first field indicating a first wireless network temporary identifier; and determining offset information between a second wireless network temporary identifier and the first wireless network temporary identifier based on received second configuration information or protocol agreement, the offset information and the first wireless network temporary identifier being used to determine the second wireless network temporary identifier. In the above scheme, the network device sends the first message and the second configuration information to the terminal device, which enables the network device to indicate the target transmission scheme to the terminal device, offering the advantages of simplicity and ease of implementation.

[0014] In some possible implementations of the first aspect, the second configuration information is sent by the network device via system information. In the above scheme, the network device can indicate offset value information via the second configuration information, and the implementation of this second configuration information is not limited. For example, the second configuration information may be carried within system information sent by the network device, and the system information may be carried within a system information block (SIB).

[0015] In some possible implementations of the first aspect, determining the target transmission scheme for the target channel includes: receiving first downlink control information; determining the target transmission scheme as the first transmission scheme when the cyclic redundancy check (CRC) bits of the first downlink control information are scrambled with a first radio network temporary identifier; and determining the target transmission scheme as the second transmission scheme when the CRC bits of the first downlink control information are scrambled with a second radio network temporary identifier. In the above scheme, the network device can indicate the target transmission scheme of the target channel to the terminal device using the radio network temporary identifier used for scrambling the CRC bits of the first downlink control information, which has the advantage of high efficiency in indicating the target transmission scheme and saves the overhead of indicating the target transmission scheme of the target channel.

[0016] In some possible implementations of the first aspect, determining the target transmission scheme of the target channel includes: receiving second downlink control information; the second downlink control information includes a third field, wherein M bits of the third field are used to indicate the target transmission scheme of the target channel, where M is a positive integer; if the M bits are a first value, the target transmission scheme is determined to be the first transmission scheme; if the M bits are a second value, the target transmission scheme is determined to be the second transmission scheme; or, the second downlink control information includes a fourth field; the value of the fourth field is a third value, and the fourth field is used to indicate modulation and coding information and the target transmission scheme. In the above scheme, the network device sends the second downlink control information to the terminal device. The M bits of the third field in the second downlink control information can enable the network device to indicate the target transmission scheme to the terminal device, which has the advantages of simplicity and ease of implementation. By using a fourth field of the second downlink control information, both modulation and coding information and the target transmission scheme can be indicated simultaneously, simplifying the overhead of the network device indicating the target transmission scheme.

[0017] In some possible implementations of the first aspect, the third field is a modulation and coding field; the first S bits of the third field are used to indicate modulation and coding information, where S is a positive integer, and the M bits are the last M bits of the third field. In the above scheme, the network device can indicate the target transmission scheme to the terminal device through the MCS field in the second downlink control information, which has the advantages of simplicity and ease of implementation.

[0018] In some possible implementations of the first aspect, determining the target transmission scheme for the target channel includes: receiving a first message from a network device, the first message including a fifth field, the fifth field being a reserved field in the first message; determining the target transmission scheme as the first transmission scheme when the fifth field is a fourth value; and determining the target transmission scheme as the second transmission scheme when the fifth field is a fifth value. In the above scheme, the fifth field can have multiple values, for example, the fifth field being a fourth value and the target transmission scheme being the first transmission scheme, or the fifth field being a fifth value and the target transmission scheme being the second transmission scheme. The implementation of the fourth and fifth values ​​is not limited. In this embodiment, the network device sending a first message to the terminal device can enable the network device to indicate the target transmission scheme to the terminal device, which has the advantages of simplicity and ease of implementation.

[0019] In some possible implementations of the first aspect, receiving the first message from the network device includes: receiving third configuration information, the third configuration information being used to configure a first preamble, the first preamble being used to indicate a first random access preamble identifier; sending message 1Msg1 in the random access procedure to the network device using the preamble sequence in the first preamble; and receiving the first message according to the first random access preamble identifier, the first message being message 2Msg2 or message BMsgB in the random access procedure. In the above scheme, the network device can determine whether the terminal device supports the second transmission scheme of the target channel based on the preamble sequence used by the terminal device. The network device sends the first message to the terminal device using the first random access preamble identifier, the first message containing indication information of the target transmission scheme. The network device sending the first message to the terminal device can realize the network device indicating the target transmission scheme to the terminal device, which has the advantages of simplicity and ease of implementation.

[0020] In some possible implementations of the first aspect, the method further includes: determining the transmission timing of the target channel, the target transmission timing including at least one of the following: a first transmission timing and a second transmission timing; wherein the first transmission timing includes the transmission timing of initial transmission, and the second transmission timing includes the transmission timing of repeated transmission. In the above scheme, in addition to determining the target transmission scheme of the target channel, the network device and the terminal device can also determine the transmission timing of the target channel, indicating their respective transmission timings for initial transmission and repeated transmission, so that the network device and the terminal device can perform repeated transmission according to the transmission timing, thereby improving the communication quality of the channel.

[0021] In some possible implementations of the first aspect, the transmission timing of the initial transmission includes: a first transmission timing indicated by third downlink control information scheduling the target channel, or a second transmission timing determined by the first transmission timing and a first offset. In the above scheme, the network device can send third downlink control information to the terminal device. This third downlink control information is used to schedule the target channel. This third downlink control information can indicate a first transmission timing, which can be the transmission timing of the initial transmission, or the first transmission timing can be offset according to the first offset to obtain the transmission timing of the initial transmission.

[0022] In some possible implementations of the first aspect, the timing of the repeated transmissions includes: (N-1) consecutive transmission opportunities following the initial transmission opportunity, where N is a positive integer; or, (N-1) consecutive transmission opportunities following a second offset delay of the initial transmission opportunity, where N is a positive integer; or, (N-1) equally spaced transmission opportunities following a third offset delay of the initial transmission opportunity, where N is a positive integer; or, (N-1) transmission opportunities following a fourth offset delay of the initial transmission opportunity, where N is a positive integer, and the specific interval is represented as... Let j represent the interval between the j-th transmission opportunity and the (j+1)-th transmission opportunity, where j = {1, 2, ..., N-2}. In the above scheme, the transmission opportunity for repeated transmission can be determined by offsetting the transmission opportunity of the initial transmission. There can be multiple possible transmission opportunities for repeated transmission, which are not limited in this embodiment. Through the repeated transmission opportunities, the terminal device and the network device can perform repeated transmissions.

[0023] Secondly, embodiments of this application provide a communication method. This method can be executed by a communication device, or by a component (such as a circuit, chip, or chip system) configured in the communication device, or by a logic module or software capable of implementing all or part of the functions of the communication device. This application does not limit this. For example, the method is applied to a network device, and the following description uses a network device as an example. The method includes: determining a target transmission scheme for a target channel, the target transmission scheme including at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer; and transmitting data on the target channel according to the target transmission scheme. In the above scheme, the network device can determine the target transmission scheme for the target channel, which includes a physical layer downlink shared channel carrying random access procedure messages 4, so that the network device can configure the first transmission scheme or the second transmission scheme. The network device can use the first transmission scheme or the second transmission scheme to transmit on the physical layer downlink shared channel carrying random access procedure messages 4, thereby improving the communication quality of the channel.

[0024] In one possible implementation of the second aspect of this application, the method further includes: receiving first information from a terminal device; wherein the first information is used to instruct the terminal device to support a second transmission scheme for the target channel; or, the first information is used to request the network device to use the second transmission scheme for the target channel.

[0025] In one possible implementation of the second aspect of this application, determining the target transmission scheme of the target channel includes: determining the target transmission scheme of the target channel according to a protocol agreement; or, the method further includes: after determining the target transmission scheme of the target channel, sending first configuration information to the terminal device, wherein the first configuration information is used to indicate the target transmission scheme of the target channel.

[0026] In one possible implementation of the second aspect of this application, the method further includes: sending a first message to a terminal device, the first message including a first field and / or a second field; the first field being used to indicate a first wireless network temporary identifier, the first wireless network temporary identifier corresponding to the first transmission scheme; and the second field being used to indicate a second wireless network temporary identifier, the second wireless network temporary identifier corresponding to the second transmission scheme.

[0027] In one possible implementation of the second aspect of this application, the second field includes the second temporary wireless network identifier, or the second field includes offset information between the second temporary wireless network identifier and the first temporary wireless network identifier, the offset information and the first temporary wireless network identifier being used to determine the second temporary wireless network identifier.

[0028] In one possible implementation of the second aspect of this application, the first message is sent via message 2Msg2 during a random access procedure.

[0029] In one possible implementation of the second aspect of this application, the method further includes: sending a first message to a terminal device, the first message including a first field, the first field being used to indicate a first wireless network temporary identifier; and sending second configuration information to the terminal device, the second configuration information being used to indicate offset value information between the second wireless network temporary identifier and the first wireless network temporary identifier.

[0030] In one possible implementation of the second aspect of this application, the method further includes: sending second configuration information to a terminal device via system information, the second configuration information being used to indicate the offset value information.

[0031] In one possible implementation of the second aspect of this application, the method further includes: sending first downlink control information to a terminal device, wherein, when the target transmission scheme is determined to be the first transmission scheme, the cyclic redundancy check (CRC) bits of the first downlink control information are scrambled with a first wireless network temporary identifier; and when the target transmission scheme is determined to be the second transmission scheme, the CRC bits of the first downlink control information are scrambled with a second wireless network temporary identifier.

[0032] In one possible implementation of the second aspect of this application, the method further includes:

[0033] Send second downlink control information to the terminal device; the second downlink control information includes a third field, wherein M bits of the third field are used to indicate the target transmission scheme of the target channel, wherein M is a positive integer, and the M bits are a first value when the target transmission scheme is determined to be the first transmission scheme; and a second value when the target transmission scheme is determined to be the second transmission scheme; or, the second downlink control information includes a fourth field; the value of the fourth field is a third value, and the fourth field is used to indicate modulation and coding information and the target transmission scheme.

[0034] In one possible implementation of the second aspect of this application, the third field is a modulation and coding field; the first S bits of the third field are used to indicate modulation and coding information, where S is a positive integer, and the M bits are the last M bits of the third field.

[0035] In one possible implementation of the second aspect of this application, the method further includes: sending a first message to a terminal device, the first message including a fifth field, the fifth field being a reserved field in the first message; when the target transmission scheme is determined to be the first transmission scheme, the fifth field is a fourth value; when the target transmission scheme is determined to be the second transmission scheme, the fifth field is a fifth value.

[0036] In one possible implementation of the second aspect of this application, sending the first message to the terminal device includes: sending third configuration information to the terminal device, the third configuration information being used to configure a first preamble, the first preamble being used to indicate a first random access preamble identifier; and sending the first message to the terminal device using the first random access preamble identifier, the first message being message 2Msg2 or message BMsgB in the random access process.

[0037] In one possible implementation of the second aspect of this application, the method further includes: determining the transmission timing of the target channel, the target transmission timing including at least one of the following: a first transmission timing and a second transmission timing; wherein the first transmission timing includes the transmission timing of initial transmission, and the second transmission timing includes the transmission timing of repeated transmission.

[0038] In one possible implementation of the second aspect of this application, the transmission timing of the initial transmission includes: a first transmission timing indicated by the third downlink control information scheduling the target channel, or a second transmission timing determined by the first transmission timing and a first offset.

[0039] In one possible implementation of the second aspect of this application, the timing of the repeated transmissions includes: (N-1) consecutive transmission opportunities after the initial transmission opportunity, where N is a positive integer; or, (N-1) consecutive transmission opportunities after the initial transmission opportunity is delayed by a second offset, where N is a positive integer; or, (N-1) equally spaced transmission opportunities after the initial transmission opportunity is delayed by a third offset, where N is a positive integer; or, (N-1) transmission opportunities at a specific interval after the initial transmission opportunity is delayed by a fourth offset, where N is a positive integer, and the specific interval is represented as... This represents the interval between the j-th transmission opportunity and the (j+1)-th transmission opportunity, where j = {1, 2, ..., N-2}.

[0040] A third aspect of this application provides a terminal device, the terminal device comprising:

[0041] The processing module is used to determine the target transmission scheme of the target channel. The target transmission scheme includes at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer.

[0042] A communication module is used to transmit data on the target channel according to the target transmission scheme.

[0043] A fourth aspect of this application provides a network device, the network device comprising:

[0044] The processing module is used to determine the target transmission scheme of the target channel. The target transmission scheme includes at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer.

[0045] A communication module is used to transmit data on the target channel according to the target transmission scheme.

[0046] A fifth aspect of this application provides a communication device, comprising: a memory and at least one processor. The memory is used to store programs or computer instructions, and the at least one processor is used to execute the computer programs or computer instructions stored in the memory, so that the communication device implements the methods provided in the first or second aspect of this application.

[0047] The sixth aspect of this application provides a computer storage medium for storing a computer program, which, when executed, implements the method provided in the first or second aspect of this application.

[0048] The seventh aspect of this application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the method provided in the first or second aspect described above.

[0049] An eighth aspect of this application provides a chip system including a processor for supporting a terminal device or network device in implementing the functions involved in the foregoing aspects, such as transmitting or processing data and / or information involved in the foregoing methods. In one possible design, the chip system further includes a memory for storing program instructions and data necessary for the terminal device or network device. The chip system may be composed of chips or may include chips and other discrete devices.

[0050] The ninth aspect of this application provides a communication system, comprising:

[0051] The terminal device as described in any one of the third aspects above and the network device as described in any one of the fourth aspects above. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the system architecture of the communication system provided in the embodiments of this application;

[0053] Figure 2 This application provides a schematic diagram of the interaction process between a terminal device and a network device, as illustrated in an embodiment of the present application.

[0054] Figure 3 A schematic diagram illustrating the composition structure of a first message provided in an embodiment of this application;

[0055] Figure 4a This is a schematic diagram illustrating the composition structure of a first downlink control information provided in an embodiment of this application;

[0056] Figure 4b This is a schematic diagram illustrating the composition structure of another first downlink control information provided in an embodiment of this application;

[0057] Figure 5a This is a schematic diagram illustrating the composition structure of a second downlink control information provided in an embodiment of this application;

[0058] Figure 5b This is a schematic diagram illustrating the composition structure of another type of second downlink control information provided in an embodiment of this application.

[0059] Figure 6 This is a schematic diagram illustrating the composition structure of another type of second downlink control information provided in an embodiment of this application.

[0060] Figure 7 A schematic diagram illustrating the composition structure of another first message provided in an embodiment of this application;

[0061] Figure 8 This is a schematic diagram of the composition structure of a terminal device provided in an embodiment of this application;

[0062] Figure 9This is a schematic diagram of the composition structure of a network device provided in an embodiment of this application;

[0063] Figure 10 This is a structural example diagram of an electronic device disclosed in an embodiment of this application;

[0064] Figure 11 This is a structural example diagram of another electronic device disclosed in an embodiment of this application. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0066] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0067] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0068] The embodiments of this application are applied to communication systems, which can be second-generation (2G) communication systems, third-generation (3G) communication systems, long-term evolution (LTE) systems, fifth-generation (5G) communication systems, LTE and 5G hybrid architectures, 5G New Radio (5G NR) systems, and new communication systems that will emerge in the future development of communication, such as possible sixth-generation (6G) communication systems, and satellite communication systems, etc.

[0069] In the embodiments provided in this application, the communication system includes terminal equipment and network equipment. The network equipment can be any device with wireless transceiver capabilities, including but not limited to: evolved Node Bs (NodeBs, eNBs, or e-NodeBs) in Long Term Evolution (LTE), base stations (gNodeBs or gNBs) or transmission receiving points / transmission reception points (TRPs) in New Radio (NR), base stations in subsequent 3GPP evolutions, access nodes in Wi-Fi systems, wireless relay nodes, wireless backhaul nodes, etc. Base stations can be: macro base stations, micro base stations, pico base stations, small cells, relay stations, or balloon stations, etc. A base station can contain one or more co-located or non-co-located Transmission Reception Points (TRPs). The base station can also be a radio controller, centralized unit (CU), and / or distributed unit (DU) in a cloud radio access network (CRAN) scenario. The base station can communicate with the terminal or communicate with the terminal through a relay station. The terminal can communicate with multiple base stations using different technologies. For example, the terminal can communicate with base stations that support LTE networks, base stations that support 5G networks, and can also establish dual connections with both LTE and 5G base stations.

[0070] In the embodiments provided in this application, the terminal can take various forms, such as a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, vehicle-mounted terminal device, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, wearable terminal device, etc. The terminal may also be referred to as terminal equipment, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile device, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent, or UE device, etc. The terminal can also be a fixed terminal or a mobile terminal.

[0071] Taking the communication system provided in this application embodiment as an example, which is a satellite communication system, the satellite communication system consists of a satellite part and a ground part. Figure 1 As shown, in this embodiment, satellite 100 can provide wireless access services to terminal device 400, allocate wireless resources to the accessing terminal device 400, and provide reliable wireless transmission protocols and data encryption protocols. Satellite 100 can be an artificial Earth satellite or a high-altitude spacecraft, such as an evolved NodeB (eNB) or a next-generation node B (gNB). Alternatively, the satellite can act as a relay for base stations, transmitting the wireless signals of these base stations to the terminal device; in this case, the ground station can be considered a wireless communication base station. Therefore, in some embodiments of this application, such as in satellite regenerative scenarios, the network device can be... Figure 1 The satellite base station shown includes satellite 100; in other embodiments, such as in a transparent satellite scenario, the network device can be... Figure 1 The ground station 300 is shown. It is understood that the names of devices with network functionality may differ in systems using different wireless access technologies; therefore, they will not be shown individually in this application.

[0072] For example, when satellite 100 operates in transparent transmission mode, it has relay forwarding functionality. Ground station 300 has base station functionality or partial base station functionality; in this case, ground station 300 can be considered a base station. Alternatively, base station 200 can be deployed separately from ground station 300. In this case, the power supply link delay includes both the delay from satellite 200 to ground station 300 and the delay from ground station 300 to base station 200.

[0073] For ease of description, the transparent transmission mode described below uses the case where ground station 300 and base station 200 are located together or close to each other as an example. For cases where ground station 300 and base station 200 are far apart, the feeder link delay can be calculated by adding the delays from satellite 100 to ground station 300 and from ground station 300 to base station 200. This is understandable. Figure 1 The example shown is based on the separate deployment of ground station 300 and base station 200, and should not be construed as a limitation on the embodiments of this application. When satellite 100 is operating in regeneration mode, satellite 100 has data processing capabilities, base station functions, or partial base station functions, and in this case, satellite 100 can be regarded as a base station.

[0074] Optionally, satellite 100 can be a geostationary earth orbit (GEO) satellite, a non-geostationary earth orbit (NGEO) medium earth orbit (MEO) satellite, or a low earth orbit (LEO) satellite, or a high-altitude platform station (HAPS), etc. This application does not limit the specific type of satellite.

[0075] The ground station 300 in this embodiment can be used to connect the satellite 100 and the core network. For example, when the satellite 100 acts as a wireless communication base station, the ground station 300 can transmit signaling between the satellite 100 and the core network. Alternatively, the ground station 300 can act as a wireless communication base station, and the satellite can transmit signaling between the terminal device 400 and the ground station 300. For example, during communication, the ground station 300 can send signaling from the core network to the satellite 100 via a feeder link; and the satellite 100 can then send the signaling to the terminal device 400 via the service link between the satellite and the terminal device. Correspondingly, the terminal device 400 can also send signaling to the satellite 100 via the service link, and the satellite 100 can then send the signaling to the core network via the ground station 300.

[0076] Understandable Figure 1Only one satellite 100 and one ground station 300 are shown. In actual use, a multi-satellite and / or multi-ground station architecture can be adopted as needed. Each satellite can provide services to one or more terminal devices, each satellite can correspond to one or more ground stations, and each ground station can correspond to one or more satellites, etc. The scheme described in this application is for satellite communication scenarios or for terrestrial communication network scenarios, and is not specifically limited thereto.

[0077] Satellite communication is characterized by its wide range; communication is possible between any two points within the coverage area of ​​the satellite's emitted radio waves. Furthermore, it is less susceptible to land-based disasters and boasts high reliability. As a supplement to current terrestrial cellular communication systems, satellite communication can extend coverage. For areas where current cellular communication systems cannot reach or are too costly to cover, such as oceans, deserts, and remote mountainous regions, satellite communication can solve communication problems. It can also enable emergency communication; in extreme situations such as disasters like earthquakes that render cellular communication infrastructure unavailable, satellite communication can quickly establish communication connections. Additionally, it can provide industry applications; for example, for long-distance, latency-sensitive services, satellite communication can reduce transmission latency.

[0078] In current satellite communication systems, the low power of satellite payloads and long communication paths result in poor communication link quality, necessitating enhancement of the reception performance of specific link channels. In this embodiment, repeated transmissions can be performed between the satellite and the terminal device, allowing the terminal to merge data, reducing terminal complexity, and improving channel communication quality.

[0079] To make the technical solution of this application clearer and easier to understand, the method for reporting time advance in the embodiments of this application is described below with reference to the accompanying drawings. The embodiments of this application are applicable to data transmission processes in satellite communication scenarios, and this application uses a transmission scheme between a terminal device and a network device as an example. The determination of the above-described transmission scheme between a terminal device and a network device is only a feasible example. The embodiments of this application can be applied to data transmission between terminal devices, or data transmission between network devices, or data transmission between two network elements in a wireless communication network.

[0080] This application provides a communication method to achieve repeated transmission between a terminal device and a network device. Please refer to... Figure 2 The diagram shown illustrates an interaction process between a terminal device and a network device according to an embodiment of this application, mainly including the following steps:

[0081] 201. The network device determines the target transmission scheme for the target channel. The target transmission scheme includes at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer.

[0082] 202. The terminal device determines the target transmission scheme for the target channel. The target transmission scheme includes at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer.

[0083] In this application, the repeated transmission can include two definitions. The first definition includes both the initial transmission and repeated transmissions, with the total number of repeated transmissions being the sum of the initial and repeated transmissions. The second definition may only include repeated transmissions, meaning the initial transmission is not counted in the repeated transmission count, and the corresponding repeated transmission count only includes the number of repeated transmissions. In other words, the repeated transmission count is the number of repeated transmissions excluding the first transmission. For consistency, this application uniformly uses the first definition of repeated transmission for description, and different description methods are not limited here.

[0084] In this embodiment, the target channel can be one or more channels. This target channel can be used for the transmission of reference signals or data between network devices and terminal devices. Subsequent data transmission on the target channel can also be understood as the transmission of reference signals on the target channel. The target channel corresponds to a target transmission scheme, which can be used to indicate the number of repeated transmissions on the target channel. The repeated transmissions can include initial transmissions and repeated transmissions. If there is only an initial transmission, it can also be called a single transmission, meaning the same data is transmitted only once. Repeated transmission refers to transmitting the same data multiple times. The number of repeated transmissions can be represented by N, where N is a positive integer, and the value of N is not limited.

[0085] In this embodiment, the network device can determine the target transmission scheme for the target channel, for example, the network device can determine the number of repetitions for the target channel. The terminal device can also determine the target transmission scheme for the target channel, for example, the terminal device can determine the number of repetitions for the target channel. The network device and the terminal device determine the target transmission scheme independently, or the network device and the terminal device interact to determine the target transmission scheme.

[0086] In this embodiment, the target transmission scheme includes at least one of the following: a first transmission scheme and a second transmission scheme, wherein the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions. It is not limited to this; the target transmission scheme in this embodiment may include multiple transmission schemes.

[0087] In this embodiment, the target channel can be a downlink channel, such as the Physical Downlink Shared Channel (PDSCH) carrying the Random Access Procedure Message 4 (Msg4). The Random Access Procedure Message 4 is message 4 transmitted during the random access process. It is not limited to this; the target channel can also be other channels.

[0088] In some embodiments of this application, the communication method executed by the terminal device may include, in addition to the aforementioned steps, the following steps:

[0089] A1. The terminal device sends the first information to the network device;

[0090] The first information is used to indicate to the terminal device the second transmission scheme that supports the target channel;

[0091] or,

[0092] The first information is used to request the network device to use the second transmission scheme of the target channel.

[0093] In some embodiments of this application, the communication method performed by the network device may include, in addition to the steps described above, the following steps:

[0094] A2. The network device receives the first information from the terminal device;

[0095] The first information is used to indicate to the terminal device the second transmission scheme that supports the target channel;

[0096] or,

[0097] The first information is used to request the network device to use the second transmission scheme of the target channel.

[0098] The terminal device can support a first transmission scheme for the target channel, meaning it supports a single transmission of the target channel. Alternatively, the terminal device can support a second transmission scheme for the target channel, meaning it supports N repeated transmissions of the target channel. The terminal device generates first information indicating that it supports the second transmission scheme for the target channel. The terminal device can send the first information to the network device, allowing the network device to determine that the terminal device supports the second transmission scheme based on the first information. The implementation method of the first information is not limited.

[0099] When the terminal device supports the second transmission scheme for the target channel, the network device can generate first information. This first information requests the network device to use the second transmission scheme for the target channel. The terminal device can send the first information to the network device, thereby allowing the network device to determine, based on the request in the first information, that the terminal device is requesting to use the second transmission scheme for the target channel. The implementation method of the first information is not limited.

[0100] In this embodiment, the terminal device reports first information to the network device. This first information is either information about the terminal device's ability to support a second transmission scheme, or a request from the terminal device requesting the network to use the second transmission scheme. By reporting this first information, the network device can configure the second transmission scheme for the target channel. This allows both the terminal device and the network device to use the second transmission scheme for repeated transmissions, improving the communication quality of the channel.

[0101] In some embodiments of this application, step 301, where the network device determines the target transmission scheme for the target channel, includes:

[0102] B1. The network equipment determines the target transmission scheme for the target channel according to the protocol agreement;

[0103] or,

[0104] In addition to the steps mentioned above, the communication method performed by the network device may also include the following steps:

[0105] B2. After determining the target transmission scheme for the target channel, the network device sends first configuration information to the terminal device. The first configuration information is used to indicate the target transmission scheme for the target channel.

[0106] In some embodiments of this application, step 302, where the terminal device determines the target transmission scheme for the target channel, includes:

[0107] B3. The terminal equipment determines the target transmission scheme for the target channel according to the protocol agreement;

[0108] or,

[0109] B4. The terminal device receives first configuration information, which is used to configure the target transmission scheme used by the terminal device.

[0110] In this embodiment, network devices and terminal devices can determine the target transmission scheme for the target channel based on protocol agreements. The target transmission scheme for the target channel can be specified in the protocol, for example, the protocol may specify the target transmission scheme as a first transmission scheme, or the protocol may specify the target transmission scheme as a second transmission scheme, or the protocol may specify either the first or the second transmission scheme. This embodiment does not limit the method of specifying the transmission scheme in the protocol. Determining the target transmission scheme for the target channel based on protocol agreements is simple and easy to configure.

[0111] After determining the target transmission scheme for the target channel, the network device sends first configuration information to the terminal device. This first configuration information indicates the target transmission scheme for the target channel; for example, it may be sent via a System Information Block (SIB). The implementation method of the first configuration information is not limited. The terminal device receives the first configuration information, which is used to configure the target transmission scheme to be used by the terminal device. In this embodiment, the network device and the terminal device can interactively determine the target transmission scheme for the target channel. Therefore, the terminal device and the network device can use either the first transmission scheme or the second transmission scheme for transmission, improving the communication quality of the channel.

[0112] In some embodiments of this application, the communication method performed by the network device may include, in addition to the steps described above, the following steps:

[0113] C1. The network device sends a first message to the terminal device, the first message including a first field and / or a second field;

[0114] The first field is used to indicate the first Radio Network Temporary Identifier (RNTI), which corresponds to the first transmission scheme;

[0115] The second field is used to indicate the second temporary wireless network identifier, which corresponds to the second transmission scheme.

[0116] Accordingly, step 302, the terminal device determines the target transmission scheme for the target channel, including:

[0117] C2. The terminal device receives a first message from the network device, the first message including a first field and / or a second field;

[0118] The first field is used to indicate a first wireless network temporary identifier, which corresponds to a first transmission scheme;

[0119] The second field is used to indicate the second temporary wireless network identifier, which corresponds to the second transmission scheme.

[0120] In this process, network devices and terminal devices can exchange first messages. By using fields carried in these first messages to indicate different temporary wireless network identifiers, and then leveraging the correspondence between these identifiers and transmission schemes, the network device can instruct the terminal device on the target transmission scheme for the target channel. This approach is simple and easy to implement. For example... Figure 3 As shown, the first message may include a first field, or the first message may include a second field, or the first message may include both a first field and a second field. There are no restrictions on the implementation of the first message.

[0121] In some embodiments of this application, the second field includes a second temporary wireless network identifier, or the second field includes offset information between the second temporary wireless network identifier and the first temporary wireless network identifier, the offset information and the first temporary wireless network identifier being used to determine the second temporary wireless network identifier.

[0122] The second field can directly indicate the second temporary wireless network identifier, allowing the terminal device to determine it by parsing this field. Alternatively, the second field can indicate offset information, which the terminal device uses to determine the second temporary wireless network identifier along with the first temporary wireless network identifier. This application provides two methods for indicating the second temporary wireless network identifier, either directly or indirectly, to enable the terminal device to be instructed on the second temporary wireless network identifier.

[0123] In some embodiments of this application, the first message is sent via message 2 (Msg2) during the random access procedure.

[0124] Sending the first message via message 2 simplifies the process of instructing the network device to the terminal device about the target transmission scheme, allowing the terminal device to determine the first message through message 2. Message 2 is merely one possible implementation and is not intended to limit the scope of this application.

[0125] For example, the first message includes the Radio Network Temporary Identifier (RNTI) used in the first Downlink Control Information (DCI). The terminal device receives the first field in the first message and obtains the first RNTI. The first message is message 2 (Msg2) in the random access procedure, and Msg2 contains the Media Access Control (MAC) Random Access Response (RAR). For example, the first RNTI is the Temporary Cell (TC) RNTI in the existing protocol.

[0126] For example, the terminal device receives the second field from the first message and obtains the second RNTI. The second field corresponds to a 16-bit value. The second RNTI is the value corresponding to the aforementioned 16-bit field. Alternatively, the second field may be an offset value relative to the first RNTI, i.e., offset1, which can be positive or negative. For example, the second RNTI = (first RNTI + offset1) mod (2^16), where mod is the modulo operation, and 2^16 represents 2 to the power of 16.

[0127] In some embodiments of this application, the communication method performed by the network device may include, in addition to the aforementioned steps, the following operations:

[0128] D1. The network device sends a first message to the terminal device. The first message includes a first field, which is used to indicate a temporary identifier of the first wireless network.

[0129] D2. The network device sends second configuration information to the terminal device. The second configuration information is used to indicate the offset value information between the second wireless network temporary identifier and the first wireless network temporary identifier.

[0130] Accordingly, step 302, the terminal device determines the target transmission scheme for the target channel, including the following operations:

[0131] D3. The terminal device receives a first message from the network device. The first message includes a first field, which is used to indicate a first wireless network temporary identifier.

[0132] D4. The terminal device determines the offset value information between the second wireless network temporary identifier and the first wireless network temporary identifier based on the received second configuration information or protocol agreement. The offset value information and the first wireless network temporary identifier are used to determine the second wireless network temporary identifier.

[0133] In this embodiment, the network device sends a first message indicating a first temporary wireless network identifier (TWI). The terminal device can receive this first message and determine the first TWI. The network device can also send second configuration information to the terminal device. This second configuration information indicates an offset between the second TWI and the first TWI. The terminal device determines the second TWI based on this offset and the first TWI. In this embodiment, the network device sending the first message and the second configuration information to the terminal device enables the network device to indicate a target transmission scheme to the terminal device, which is simple and easy to implement.

[0134] For example, the terminal device receives second configuration information, or determines the offset value between the second RNTI and the first RNTI, such as offset2, according to a protocol agreement. The second configuration information is sent by the network device through System Information (SIB), or by the network device through Radio Resource Control (RRC) signaling. For example, the second RNTI = (first RNTI + offset2) mod 2^16.

[0135] In some embodiments of this application, the network device sends second configuration information to the terminal device through system information, and the second configuration information is used to indicate offset value information.

[0136] In some embodiments of this application, for terminal devices, the second configuration information is sent by the network device through system information.

[0137] In this embodiment, the network device can indicate offset value information through second configuration information, and the implementation method of the second configuration information is not limited. For example, the second configuration information is carried in system information (SIB) sent by the network device.

[0138] In some embodiments of this application, the communication method performed by the network device may include, in addition to the steps described above, the following steps:

[0139] E1. The network device sends first downlink control information to the terminal device, wherein, if the target transmission scheme is determined to be the first transmission scheme, the cyclic redundancy check (CRC) bits of the first downlink control information are scrambled with a first wireless network temporary identifier; if the target transmission scheme is determined to be the second transmission scheme, the CRC bits of the first downlink control information are scrambled with a second wireless network temporary identifier.

[0140] Accordingly, step 302, the terminal device determines the target transmission scheme for the target channel, including:

[0141] E2. The terminal device receives the first downlink control information;

[0142] E3. When the cyclic redundancy check bits of the first downlink control information are scrambled by the first wireless network temporary identifier, the terminal device determines the target transmission scheme as the first transmission scheme;

[0143] E4. When the CRC bits of the first downlink control information are scrambled by the second wireless network temporary identifier, the terminal device determines the target transmission scheme as the second transmission scheme.

[0144] Among them, such as Figure 4aAs shown, the first downlink control information includes a first CRC bit, scrambled by a first wireless network temporary identifier, and the target transmission scheme is the first transmission scheme. For example... Figure 4b As shown, the first downlink control information includes a second CRC bit, which is scrambled by a second wireless network temporary identifier, and the target transmission scheme is the second transmission scheme. In this embodiment, the wireless network temporary identifier used by the network device to scramble the CRC bit of the first downlink control information can indicate the target transmission scheme of the target channel to the terminal device, which has the advantage of high efficiency in indicating the target transmission scheme and saves the overhead of indicating the target transmission scheme of the target channel.

[0145] For example, a terminal device receives a first DCI, which is the DCI for scheduling the target channel. If the transmission scheme configured for the target channel includes a second transmission scheme, and / or the terminal device reports first information to the network device. If the first DCI scrambles the CRC bits using a first RNTI, it is determined that the target channel uses the first transmission scheme for transmission. If the first DCI scrambles its CRC bits using a second RNTI, it is determined that the target channel uses the second transmission scheme for transmission.

[0146] In some embodiments of this application, the communication method performed by the network device may include, in addition to the steps described above, the following steps:

[0147] F1. The network device sends a second downlink control message to the terminal device;

[0148] The second downlink control information includes a third field, in which M bits are used to indicate the target transmission scheme of the target channel, where M is a positive integer; if the target transmission scheme is determined to be the first transmission scheme, the M bits are the first value; if the target transmission scheme is determined to be the second transmission scheme, the M bits are the second value.

[0149] or,

[0150] The second downlink control information includes a fourth field;

[0151] The fourth field takes the value of the third value and is used to indicate modulation and coding information and the target transmission scheme.

[0152] Accordingly, step 302, the terminal device determines the target transmission scheme for the target channel, including:

[0153] F2. The terminal device receives the second downlink control information, which includes a third field. The M bits of the third field are used to indicate the target transmission scheme of the target channel, where M is a positive integer. If the M bits are the first value, the terminal device determines that the target transmission scheme is the first transmission scheme. If the M bits are the second value, the terminal device determines that the target transmission scheme is the second transmission scheme.

[0154] or,

[0155] The second downlink control information includes a fourth field;

[0156] The fourth field takes the value of the third value and is used to indicate modulation and coding information and the target transmission scheme.

[0157] Among them, such as Figure 5a As shown, the second downlink control information sent by the network device may include a third field, where M bits of the third field are used to indicate the target transmission scheme for the target channel. The terminal device can receive the second downlink control information and determine the third field. The third field can have multiple values; for example, the third field can be a first value, and the target transmission scheme can be a first transmission scheme; or the third field can be a second value, and the target transmission scheme can be a second transmission scheme. In this embodiment, the network device sending the second downlink control information to the terminal device can indicate the target transmission scheme to the terminal device, which has the advantages of simplicity and ease of implementation.

[0158] like Figure 5b As shown, the second downlink control information sent by the network device may include a fourth field. This fourth field serves two purposes: indicating modulation and coding information and the target transmission scheme. By setting the fourth field to a third value, both modulation and coding information and the target transmission scheme can be indicated simultaneously, simplifying the overhead of the network device in indicating the target transmission scheme. For example, the terminal device uses the fourth field in the second downlink control information to determine the MCS index and target transmission scheme of the target channel. If the fourth field is a third value, then the value of the fourth field corresponds to an MCS index and a target transmission scheme. The third value includes {29, 30, 31}. For example, if the fourth field value is V1, it indicates that the MCS index of the target channel is L1 and the target transmission scheme is the first transmission scheme, where L1 is 0 or a positive integer; if the fourth field value is V2, it indicates that the MCS index of the target channel is L2 and the target transmission scheme is the second transmission scheme, where L2 is 0 or a positive integer.

[0159] Furthermore, in some embodiments of this application, such as Figure 6As shown, the third field is the Modulation and Coding Scheme (MCS) field;

[0160] The first S bits of the third field are used to indicate modulation and coding information, where S is a positive integer, and the M bits are the last M bits of the third field.

[0161] The second downlink control information includes an MCS field, which serves two purposes: indicating the MCS information and the target transmission scheme for the target channel. The length of the MCS field is not limited. The first S bits are used to indicate modulation and coding information, and the M bits are the last M bits of the third field; the values ​​of S and M are not limited. In this embodiment, the network device can indicate the target transmission scheme to the terminal device through the MCS field in the second downlink control information, which has the advantages of simplicity and ease of implementation.

[0162] For example, the terminal device determines the target channel transmission scheme through the Modulation and Coding System (MCS) field in the second DCI. The terminal device receives the third field in the second DCI. For example, the third field is the MCS field. If the transmission scheme configured for the target channel includes the second transmission scheme, and the terminal device supports the second transmission scheme, and / or the UE reports the first information to the network, the first S bits of the first field in the second DCI are used to represent the MCS index, and the last M bits of the third field in the second DCI information are used to indicate whether the target channel uses the second transmission scheme for transmission. S and M are positive integers, and their values ​​are pre-agreed by the protocol or pre-configured by higher-layer signaling. The MCS index can also be called the MCS level.

[0163] In some embodiments of this application, the communication method performed by the network device may include, in addition to the steps described above, the following steps:

[0164] G1. The network device sends a first message to the terminal device. The first message includes a fifth field, which is a reserved field in the first message.

[0165] If the target transmission scheme is determined to be the first transmission scheme, the fifth field is the fourth value;

[0166] If the target transmission scheme is determined to be the second transmission scheme, the fifth field will have the fifth value.

[0167] Accordingly, step 302, the terminal device determines the target transmission scheme for the target channel, including:

[0168] G2. The terminal device receives a first message from the network device. The first message includes a fifth field, which is a reserved field in the first message.

[0169] When the fifth field is the fourth value, the terminal device determines the target transmission scheme as the first transmission scheme;

[0170] If the fifth field has the fifth value, the terminal device determines the target transmission scheme as the second transmission scheme.

[0171] Among them, such as Figure 7 As shown, the first message sent by the network device may include a fifth field, which is a reserved field in the first message, such as an existing reserved field in the first message. This existing reserved field refers to a field reserved in existing protocols, specifically 3GPP Release 18 and earlier versions. In this embodiment, the reserved field in the first message can be used to indicate the target transmission scheme for the target channel. The terminal device can receive the first message and determine the fifth field. The fifth field can have multiple values; for example, the fifth field can be the fourth value, and the target transmission scheme can be the first transmission scheme; or the fifth field can be the fifth value, and the target transmission scheme can be the second transmission scheme. The implementation of the fourth and fifth values ​​is not limited. In this embodiment, the network device sending the first message to the terminal device can indicate the target transmission scheme, which has the advantages of simplicity and ease of implementation.

[0172] For example, a terminal device can determine the transmission scheme of a target channel through a first message. For instance, the first message might be Msg2. If the transmission scheme configured for the target channel includes a second transmission scheme, and / or the UE has reported first information to the network, the terminal device receives the first message (Msg2) in a first format. If the reserved bit in the MAC subheader for RandomAccess Response is 0, it determines that the target channel uses the first transmission scheme; if the reserved bit is 1, it determines that the target channel uses the second transmission scheme.

[0173] Among them, the first format first message (Msg2) is identical to the existing Msg2 in the protocol (Msg2 in Release 18 and earlier versions 38.321) except that the reserved bit mentioned above is enabled.

[0174] In some embodiments of this application, the network device sends a first message to the terminal device, and correspondingly, the terminal device receives the first message from the network device. The specific process is as follows:

[0175] G11. The network device sends third configuration information to the terminal device. The third configuration information is used to configure the first preamble. The first preamble is used to indicate the first random access preamble identifier.

[0176] G21. The terminal device receives third configuration information, which is used to configure a first preamble. The first preamble is used to indicate a first random access preamble identifier (RAPID).

[0177] G22. The terminal device sends message 1 (Msg1) in the random access procedure to the network device using the preamble sequence in the first preamble;

[0178] G12. The network device sends a first message to the terminal device using the first random access preamble identifier. The first message is either message 2 (Msg2) or message B (MsgB) in the random access process.

[0179] G23. The terminal device receives a first message based on the first random access preamble identifier. The first message is message 2 or message B in the random access process.

[0180] In this embodiment, the network device first configures a first preamble and sends it to the terminal device through third configuration information. The first preamble is used to indicate a first random access preamble identifier, thereby the terminal device uses the preamble sequence in the first preamble to send message 1 in the random access process to the network device. The network device can determine whether the terminal device supports the second transmission scheme of the target channel based on the preamble sequence used by the terminal device. The network device sends a first message to the terminal device using the first random access preamble identifier, and the first message contains indication information of the target transmission scheme. The terminal device receives the first message according to the first random access preamble identifier. In this embodiment, the network device sending the first message to the terminal device can realize the network device indicating the target transmission scheme to the terminal device, which has the advantages of simplicity and ease of implementation.

[0181] For example, the terminal device receives third configuration information, which configures a first preamble; the first preamble consists of one or more preamble sequences; the random access preamble identifier (RAPID) corresponding to the first preamble is called the first RAPID. The terminal device uses the preamble sequence in the first preamble to send Msg1 (Physical Random Access Channel, PRACH). The terminal device can receive a first message (Msg2) in a second format, where the MAC subPDU (MAC RAR) corresponding to the first RAPID in the second format first message contains indication information of the target channel transmission scheme. The second format Msg2 differs from the Msg2 in existing protocols (RAR in Rel-18 and earlier 38.321) by adding indication information of the target channel transmission scheme to a specific MAC subPDU. Based on the indication information of the target channel transmission scheme, the terminal device determines whether the target channel will use the first transmission scheme or the second transmission scheme for transmission.

[0182] In some embodiments of this application, the communication method performed by the network device may include, in addition to the steps described above, the following steps:

[0183] H1. The network device determines the transmission timing of the target channel, and the target transmission timing includes at least one of the following: a first transmission timing and a second transmission timing;

[0184] The first transmission timing includes the initial transmission timing, and the second transmission timing includes the repeated transmission timing.

[0185] In some embodiments of this application, the communication method executed by the terminal device may include, in addition to the aforementioned steps, the following steps:

[0186] H2. The terminal device determines the transmission timing of the target channel, and the target transmission timing includes at least one of the following: a first transmission timing and a second transmission timing;

[0187] The first transmission timing includes the initial transmission timing, and the second transmission timing includes the repeated transmission timing.

[0188] In this embodiment, in addition to determining the target transmission scheme for the target channel, the network device and the terminal device can also determine the transmission occupancy (TO) of the target channel. The initial transmission and repeated transmission are respectively indicated for their respective transmission occupancy, so that the network device and the terminal device can perform the initial transmission and repeated transmission according to the transmission occupancy, thereby improving the communication quality of the channel.

[0189] In some embodiments of this application, the transmission timing of the initial transmission includes: a first transmission timing indicated by the third downlink control information of the target channel, or a second transmission timing determined by the first transmission timing and a first offset, wherein the value of the first offset is agreed upon by a protocol or configured by a network device.

[0190] The network device can send third downlink control information to the terminal device. This third downlink control information is used to schedule the target channel. This third downlink control information can indicate a first transmission timing. The first transmission timing can be the initial transmission timing, or it can be obtained by offsetting the first transmission timing according to a first offset. The value of the first offset is not limited.

[0191] In some embodiments of this application, the timing of repeated transmissions includes:

[0192] The (N-1) consecutive transmission opportunities following the initial transmission opportunity, where N is a positive integer;

[0193] or,

[0194] The initial transmission timing is delayed by (N-1) consecutive transmission timings after the second offset, where N is a positive integer, and the value of the second offset is determined by the protocol or configured by the network device.

[0195] or,

[0196] The initial transmission is delayed by a third offset followed by (N-1) equally spaced transmission opportunities, where N is a positive integer. The value of the third offset is determined by the protocol or configured by the network device, and the interval value T is... d The value is determined by the protocol or configured by the network device;

[0197] or,

[0198] The initial transmission timing is delayed by (N-1) transmission opportunities at a specific interval after the fourth offset, where N is a positive integer, and the specific interval is denoted as... This represents the interval between the j-th transmission opportunity and the (j+1)-th transmission opportunity, where j = {1, 2, ..., N-2}. The value of the fourth offset is determined by the protocol or configured by the network device. The value is determined by the protocol or configured by the network device.

[0199] In this embodiment, the timing of repeated transmissions can be determined by offsetting the timing of the initial transmission. There can be multiple timings for repeated transmissions, and this embodiment does not limit the specific timing. Through the timing of repeated transmissions, the terminal device and network device can perform repeated transmissions.

[0200] For example, taking the terminal device determining the transmission timing of the target channel as an example, the initial transmission occasion (TO) is determined, denoted as initial_TO. TO is one time slot carrying one transmission of the target channel, or T Orthogonal Frequency Division Multiplexing (OFDM) symbols. One transmission can be an initial transmission or a repeated transmission. T is a positive integer >= 1.

[0201] The TO indicated by the Time Domain Resource Assignment (TDRA) field in the DCI of the target channel is denoted as TO_0. For example, initial_TO is TO_0. Alternatively, initial_TO is TO_0 delayed by ΔT0. ΔT0 is a value >= 0, in units of time slots or OFDM symbols.

[0202] In one implementation, the terminal device receives fourth configuration information (e.g., an SIB message) or determines the value of ΔT0 through a protocol agreement. The terminal device determines to repeatedly transmit TO, denoted as TO_i, where i = {1, 2, ..., N-1}. For example, repeatedly transmitting TO means transmitting N-1 consecutive TOs after initial_TO. Alternatively, repeatedly transmitting TO means transmitting N-1 consecutive TOs after an initial_TO delay of ΔT1. ΔT1 is a value >= 0, and its unit is a time slot or OFDM symbol.

[0203] In another implementation, the terminal device receives the fifth configuration information, or determines the value of ΔT1 through a protocol agreement. For example, repeated transmission of TO is performed as initial_TO delayed by ΔT2 followed by N-1 equally spaced TOs. The time interval between TO_i and TO_i+1 is T. d Where i = 1, ..., N-2. ΔT2 is a value >= 0, in units of time slots or OFDM symbols. T d Values ​​greater than or equal to 0, in units of time slots or OFDM symbols.

[0204] In another implementation, the terminal device receives the sixth configuration information or determines the value of ΔT2 through a protocol agreement.

[0205] In another implementation, the terminal device receives the seventh configuration information, or determines T through a protocol agreement. d The value of .

[0206] For example, a repeated transmission of TO is a TO for a specific interval after a delay of ΔT3 from initial_TO. ΔT3 is a value >= 0, in units of time slots or OFDM symbols. The specific interval is represented as... This represents the interval between TO_j and TO_j+1, where j = {1, 2, ..., N-2}. For different values ​​of j, They can be the same or different. Values ​​greater than or equal to 0, in units of time slots or OFDM symbols.

[0207] In another implementation, the terminal device receives the eighth configuration information or determines the value of ΔT3 through a protocol agreement.

[0208] In another implementation, the terminal device receives the ninth configuration information, or determines it through a protocol agreement. The value of .

[0209] 203. Network devices transmit data on the target channel according to the target transmission scheme.

[0210] 204. The terminal equipment transmits data on the target channel according to the target transmission scheme.

[0211] In this embodiment of the application, after determining the target transmission scheme, the network device and the terminal device can transmit data on the target channel according to the target transmission scheme. For example, the network device sends data on the target channel, and the terminal device receives data on the target channel. For example, the transmitted data in steps 203 and 204 can also be understood as the transmission of reference signals.

[0212] As illustrated by the foregoing embodiments, the terminal device and the network device can each determine a target transmission scheme for the target channel. This target channel includes a physical layer downlink shared channel carrying random access procedure messages 4. Therefore, the terminal device can support either a first transmission scheme or a second transmission scheme, and the network device can configure either the first or second transmission scheme for the target channel. Consequently, the terminal device and the network device can use either the first or second transmission scheme for transmission on the physical layer downlink shared channel carrying the random access procedure messages 4, improving the communication quality of the channel.

[0213] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0214] To facilitate better implementation of the above-described solutions in the embodiments of this application, related apparatus for implementing the above-described solutions is also provided below.

[0215] Please see Figure 8 As shown in the embodiment of this application, a terminal device 800 is provided. The terminal device may include: a processing module 801 and a communication module 802, wherein...

[0216] The processing module and communication module perform the aforementioned Figure 2 The method executed by the terminal device shown.

[0217] Please see Figure 9 As shown in the embodiment of this application, a network device 900 may include: a processing module 901 and a communication module 902, wherein...

[0218] The processing module and communication module perform the aforementioned Figure 2 The method performed by the network device shown.

[0219] Figure 9 This application provides an example of the composition of an electronic device. The electronic device may be a first device, including but not limited to a base station and a core network unit. Figure 9 A simplified schematic diagram of a base station structure is shown. The base station includes a processor 1610, a memory 1620, and a transceiver 1630. The processor 1610 is mainly used for baseband processing and base station control; the processor 1610 is typically the control center of the base station and is often referred to as the processor, used to control the base station to perform the processing operations on the first device side in the above method embodiments. The memory 1620 is mainly used to store computer program code and data. The transceiver 1630 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals to baseband signals; the transceiver 1630 is often referred to as a transceiver module, transceiver, transceiver circuit, or transceiver. The transceiver module of the transceiver 1630, also called a transceiver or transceiver, includes an antenna 1633 and a radio frequency circuit (…). Figure 9 (Not shown in the image), where the radio frequency circuitry is primarily used for radio frequency processing. Optionally, the device in the transceiver 1630 section used for receiving can be considered a receiver, and the device used for transmitting can be considered a transmitter; that is, the transceiver 1630 section includes a receiver 1632 and a transmitter 1631. A receiver can also be called a receiving module, receiver circuit, or receiving module, etc., and a transmitter can be called a transmitting module, transmitter, or transmitting circuit, etc.

[0220] The processor 1610 portion and the memory 1620 portion may include one or more circuit boards, each circuit board may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If multiple circuit boards exist, they can be interconnected to enhance processing capabilities. As an optional implementation, multiple circuit boards may share one or more processors, or multiple circuit boards may share one or more memories, or multiple circuit boards may simultaneously share one or more processors.

[0221] For example, in one implementation, the transceiver module of transceiver 1630 is used to execute the transceiver-related processes performed by the base station (first device) in the aforementioned method embodiments. The processor of processor 1610 is used to execute the processing-related processes performed by the base station in the aforementioned method embodiments.

[0222] It should be understood that Figure 9 This is for illustrative purposes only and not as a limitation. The network devices mentioned above, including processors, memory, and transceivers, may be independent of... Figure 9 The structure shown.

[0223] Figure 10 This application provides another example of the composition of an electronic device. The electronic device can be a second device, which can be a terminal, including but not limited to mobile phones, smart wearable devices (such as smartwatches), and other electronic devices. Taking a mobile phone as an example, the electronic device may include a processor 310, an external memory interface 320, an internal memory 321, a display screen 330, a camera 340, antenna 1, antenna 2, a mobile communication module 350, and a wireless communication module 360, etc.

[0224] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device. In other embodiments, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0225] Processor 310 may include one or more processing units, such as application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU). These different processing units may be independent devices or integrated into one or more processors.

[0226] It is understood that the interface connection relationships between the modules illustrated in this embodiment are merely illustrative and do not constitute a limitation on the structure of the electronic device. In other embodiments of this application, the electronic device may also employ different interface connection methods or combinations of multiple interface connection methods as described in the above embodiments.

[0227] The external storage interface 320 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor 310 through the external storage interface 320 to perform data storage functions. For example, music, video, and other files can be saved on the external memory card.

[0228] Internal memory 321 can be used to store executable program code, including instructions. Processor 310 executes various functional applications and data processing of the electronic device by running the instructions stored in internal memory 321. Internal memory 321 may include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback, image playback, etc.), etc. The data storage area may store data created during the use of the electronic device (such as audio data, phonebook, etc.). Furthermore, internal memory 321 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc. Processor 310 executes various functional applications and data processing of the electronic device by running instructions stored in internal memory 321 and / or instructions stored in memory located within the processor.

[0229] The wireless communication function of electronic devices can be realized through antenna 1, antenna 2, mobile communication module 350, wireless communication module 360, modem processor and baseband processor, etc.

[0230] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device can be used to cover one or more communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in conjunction with a tuning switch.

[0231] The mobile communication module 350 can provide solutions for wireless communication applications including 2G / 3G / 4G / 5G in electronic devices. The mobile communication module 350 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 350 can receive electromagnetic waves via antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves before transmitting them to a modem processor for demodulation. The mobile communication module 350 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves for radiation via antenna 1. In some embodiments, at least some functional modules of the mobile communication module 350 may be housed in the processor 310. In some embodiments, at least some functional modules of the mobile communication module 350 and at least some modules of the processor 310 may be housed in the same device.

[0232] In some embodiments, the electronic device initiates or receives call requests via the mobile communication module 350 and the antenna 1.

[0233] Furthermore, an operating system runs on top of the aforementioned components. Examples include iOS, Android, and Windows operating systems. Applications can be installed and run on this operating system. Those skilled in the art will understand that, for the sake of convenience and brevity, explanations and beneficial effects of the relevant content in any of the above-described electronic devices can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0234] This application also provides a communication system, which may include, for example, Figure 10 The first device shown (e.g., a network device such as a base station) and such as Figure 10 The second device shown is (e.g., a mobile phone or other terminal).

[0235] In this application, the terminal or network device may include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also known as main memory). The operating system layer may be any one or more computer operating systems that implement business processing through processes, such as Linux, Unix, Android, iOS, or Windows. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0236] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0237] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or modules, and may be electrical, mechanical, or other forms.

[0238] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0239] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0240] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essential contribution of the technical solution of this application, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the processes of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0241] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A communication method, characterized in that, Applied to a terminal device, the method includes: A target transmission scheme for the target channel is determined, the target transmission scheme including at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer; Data is transmitted on the target channel according to the target transmission scheme.

2. The method according to claim 1, characterized in that, The method further includes: Send the first message to the network device; The first information is used to indicate that the terminal device supports the second transmission scheme of the target channel; or, The first information is used to request the network device to use the second transmission scheme of the target channel.

3. The method according to claim 1 or 2, characterized in that, The target transmission scheme for determining the target channel includes: The target transmission scheme for the target channel shall be determined according to the agreement. or, Receive first configuration information, which is used to configure the target transmission scheme used by the terminal device.

4. The method according to claim 1 or 2, characterized in that, The target transmission scheme for determining the target channel includes: Receive a first message from a network device, the first message including a first field and / or a second field; The first field is used to indicate a first wireless network temporary identifier, which corresponds to the first transmission scheme; The second field is used to indicate a second temporary wireless network identifier, which corresponds to the second transmission scheme.

5. The method according to claim 4, characterized in that, The second field includes the second temporary wireless network identifier, or the second field includes offset information between the second temporary wireless network identifier and the first temporary wireless network identifier, the offset information and the first temporary wireless network identifier being used to determine the second temporary wireless network identifier.

6. The method according to claim 4 or 5, characterized in that, The first message is sent via message 2Msg2 during the random access procedure.

7. The method according to claim 1 or 2, characterized in that, The target transmission scheme for determining the target channel includes: Receive a first message from a network device, the first message including a first field, the first field being used to indicate a first wireless network temporary identifier; The offset value information between the second wireless network temporary identifier and the first wireless network temporary identifier is determined according to the received second configuration information or protocol agreement. The offset value information and the first wireless network temporary identifier are used to determine the second wireless network temporary identifier.

8. The method according to claim 7, characterized in that, The second configuration information is sent by the network device through system information.

9. The method according to claim 1 or 2, characterized in that, The target transmission scheme for determining the target channel includes: Receive the first downlink control information; When the cyclic redundancy check (CRC) bits of the first downlink control information are scrambled by the first wireless network temporary identifier, the target transmission scheme is determined to be the first transmission scheme. When the CRC bits of the first downlink control information are scrambled by the second wireless network temporary identifier, the target transmission scheme is determined to be the second transmission scheme.

10. The method according to claim 1 or 2, characterized in that, The target transmission scheme for determining the target channel includes: Receive the second downlink control information; The second downlink control information includes a third field, wherein M bits of the third field are used to indicate the target transmission scheme of the target channel, where M is a positive integer. If the M bits are a first value, the target transmission scheme is determined to be the first transmission scheme; if the M bits are a second value, the target transmission scheme is determined to be the second transmission scheme. or, The second downlink control information includes a fourth field; The fourth field takes the value of the third value and is used to indicate the modulation and coding information and the target transmission scheme.

11. The method according to claim 10, characterized in that, The third field is the modulation and encoding field; The first S bits of the third field are used to indicate modulation and coding information, where S is a positive integer, and the M bits are the last M bits of the third field.

12. The method according to claim 1 or 2, characterized in that, The target transmission scheme for determining the target channel includes: Receive a first message from a network device, the first message including a fifth field, the fifth field being a reserved field in the first message; If the fifth field is the fourth value, the target transmission scheme is determined to be the first transmission scheme; If the fifth field is a fifth value, the target transmission scheme is determined to be the second transmission scheme.

13. The method according to claim 4, 7 or 12, characterized in that, The receipt of the first message from the network device includes: Receive third configuration information, the third configuration information being used to configure a first preamble, the first preamble being used to indicate a first random access preamble identifier; Send message 1Msg1 during the random access process to the network device using the preamble sequence in the first preamble; The first message is received according to the first random access preamble identifier, wherein the first message is message 2Msg2 or message BMsgB in the random access process.

14. The method according to any one of claims 1 to 13, characterized in that, The method further includes: The transmission timing of the target channel is determined, and the target transmission timing includes at least one of the following: a first transmission timing and a second transmission timing; The first transmission timing includes the initial transmission timing, and the second transmission timing includes the repeated transmission timing.

15. The method according to claim 14, characterized in that, The transmission timing of the initial transmission includes: a first transmission timing indicated by the third downlink control information scheduling the target channel, or a second transmission timing determined by the first transmission timing and a first offset.

16. The method according to claim 14 or 15, characterized in that, The timing of the repeated transmissions includes: The (N-1) consecutive transmission opportunities following the initial transmission opportunity, where N is a positive integer; or, The initial transmission timing is delayed by a second offset for (N-1) consecutive transmission timings, where N is a positive integer. or, The initial transmission timing is delayed by a third offset by (N-1) equally spaced transmission timings, where N is a positive integer; or, The initial transmission timing is delayed by a fourth offset for (N-1) specific intervals, where N is a positive integer, and the specific interval is denoted as... This represents the interval between the j-th transmission opportunity and the (j+1)-th transmission opportunity, where j = {1, 2, ..., N-2}.

17. A communication method, characterized in that, Applied to network devices, the method includes: A target transmission scheme for the target channel is determined, the target transmission scheme including at least one of the following: a first transmission scheme and a second transmission scheme, wherein the target channel includes a physical layer downlink shared channel carrying random access procedure messages 4, the first transmission scheme includes a single transmission, and the second transmission scheme includes N repeated transmissions, where N is a positive integer; Data is transmitted on the target channel according to the target transmission scheme.

18. The method according to claim 17, characterized in that, The method further includes: Receive the first information from the terminal device; The first information is used to indicate that the terminal device supports the second transmission scheme of the target channel; or, The first information is used to request the network device to use the second transmission scheme of the target channel.

19. The method according to claim 17 or 18, characterized in that, The determination of the target transmission scheme for the target channel includes: determining the target transmission scheme for the target channel according to the protocol agreement; or, The method further includes: after determining the target transmission scheme of the target channel, sending first configuration information to the terminal device, wherein the first configuration information is used to indicate the target transmission scheme of the target channel.

20. The method according to claim 17 or 18, characterized in that, The method further includes: Send a first message to the terminal device, the first message including a first field and / or a second field; The first field is used to indicate a first wireless network temporary identifier, which corresponds to the first transmission scheme; The second field is used to indicate a second temporary wireless network identifier, which corresponds to the second transmission scheme.

21. The method according to claim 20, characterized in that, The second field includes the second temporary wireless network identifier, or the second field includes offset information between the second temporary wireless network identifier and the first temporary wireless network identifier, the offset information and the first temporary wireless network identifier being used to determine the second temporary wireless network identifier.

22. The method according to claim 20 or 21, characterized in that, The first message is sent via message 2Msg2 during the random access procedure.

23. The method according to claim 17 or 18, characterized in that, The method further includes: Send a first message to the terminal device, the first message including a first field, the first field being used to indicate a first wireless network temporary identifier; Send second configuration information to the terminal device, the second configuration information being used to indicate the offset value information between the second wireless network temporary identifier and the first wireless network temporary identifier.

24. The method according to claim 23, characterized in that, The method further includes: The system sends second configuration information to the terminal device, the second configuration information being used to indicate the offset value information.

25. The method according to claim 17 or 18, characterized in that, The method further includes: Sending first downlink control information to the terminal device, wherein, if the target transmission scheme is determined to be the first transmission scheme, the cyclic redundancy check (CRC) bits of the first downlink control information are scrambled with a first wireless network temporary identifier; if the target transmission scheme is determined to be the second transmission scheme, the CRC bits of the first downlink control information are scrambled with a second wireless network temporary identifier.

26. The method according to claim 17 or 18, characterized in that, The method further includes: Send the second downlink control information to the terminal device; The second downlink control information includes a third field, wherein M bits of the third field are used to indicate the target transmission scheme of the target channel, where M is a positive integer. When the target transmission scheme is determined to be the first transmission scheme, the M bits are a first value; when the target transmission scheme is determined to be the second transmission scheme, the M bits are a second value. or, The second downlink control information includes a fourth field; The fourth field takes the value of the third value and is used to indicate the modulation and coding information and the target transmission scheme.

27. The method according to claim 26, characterized in that, The third field is the modulation and encoding field; The first S bits of the third field are used to indicate modulation and coding information, where S is a positive integer, and the M bits are the last M bits of the third field.

28. The method according to claim 17 or 18, characterized in that, The method further includes: Send a first message to the terminal device, the first message including a fifth field, the fifth field being a reserved field in the first message; If the target transmission scheme is determined to be the first transmission scheme, the fifth field is the fourth value; When the target transmission scheme is determined to be the second transmission scheme, the fifth field is the fifth value.

29. The method according to claim 20, 23 or 28, characterized in that, Sending the first message to the terminal device includes: Send third configuration information to the terminal device, the third configuration information being used to configure a first preamble, the first preamble being used to indicate a first random access preamble identifier; The first message is sent to the terminal device using the first random access preamble identifier. The first message is either message 2Msg2 or message BMsgB during the random access process.

30. The method according to any one of claims 17 to 29, characterized in that, The method further includes: The transmission timing of the target channel is determined, and the target transmission timing includes at least one of the following: a first transmission timing and a second transmission timing; The first transmission timing includes the initial transmission timing, and the second transmission timing includes the repeated transmission timing.

31. The method according to claim 30, characterized in that, The transmission timing of the initial transmission includes: a first transmission timing indicated by the third downlink control information scheduling the target channel, or a second transmission timing determined by the first transmission timing and a first offset.

32. The method according to claim 30 or 31, characterized in that, The timing of the repeated transmissions includes: The (N-1) consecutive transmission opportunities following the initial transmission opportunity, where N is a positive integer; or, The initial transmission timing is delayed by a second offset for (N-1) consecutive transmission timings, where N is a positive integer. or, The initial transmission timing is delayed by a third offset by (N-1) equally spaced transmission timings, where N is a positive integer; or, The initial transmission timing is delayed by a fourth offset for (N-1) specific intervals, where N is a positive integer, and the specific interval is denoted as... This represents the interval between the j-th transmission opportunity and the (j+1)-th transmission opportunity, where j = {1, 2, ..., N-2}.

33. A communication device, characterized in that, The communication device includes: Memory is used to store computer programs or computer instructions; A processor for executing a computer program or computer instructions stored in the memory, causing the communication device to perform the method as described in any one of claims 1 to 32.

34. A computer storage medium for storing a computer program, which, when executed, performs the method according to any one of claims 1 to 32.

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