Communication method and related apparatus

Abstract

A communication method and a related apparatus, which are applied to the technical field of communications. The method comprises: a network device sending first configuration information to a terminal device, wherein the first configuration information indicates a start point of a time resource for random access by the terminal device, and the start point is determined on the basis of a system information block (SIB19) and / or a synchronization signal block (SSB); and the network device receiving a random access signal of the terminal device in the time resource starting from the start point. The method can reduce the waste of random access resource reservation and improve resource utilization.

Description

Communication method and related apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202411068765.9, filed on August 5, 2024, and titled “Communication method and related apparatus”. This application also claims priority to the Chinese Patent Application No. 202411613966.2, filed on November 12, 2024, and titled “Communication method and related apparatus”. The entire contents of the above priority applications are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a communication method and related apparatus. BACKGROUND

[0003] Satellite communication has its unique advantages compared to ground communication, such as providing wider coverage. Satellite base stations are not easily damaged by natural disasters or external forces. The introduction of satellite communication in 5G communication or future communication can provide communication services for areas that cannot be covered by ground communication networks, such as oceans and forests. It can also enhance the reliability of communication, such as ensuring that airplanes, trains, and users on these vehicles receive better communication services. It can also provide more data transmission resources for communication and improve network speed.

[0004] However, in the satellite communication scenario, due to the large coverage area, the time delay or period of the signal is lengthened. If the random access resources are configured according to the existing standard, the time of reserving resources will be too long, reducing the resource utilization rate. SUMMARY

[0005] The present application provides a communication method and related apparatus, which can reduce the waste of random access resource reservation and improve resource utilization.

[0006] In a first aspect, an embodiment of the present application provides a communication method, the method comprising:

[0007] a network device sends first configuration information to a terminal device; the first configuration information indicates a starting point of a time resource for random access of the terminal device; the starting point is determined based on a system information block (SIB) 19 and / or a synchronization signal block (SSB);

[0008] the network device receives a random access signal of the terminal device in the time resource starting from the starting point.

[0009] For the scenario of satellite communication, the terminal device initiates access only when obtaining ephemeris in the received SIB19, and / or can access only after completing synchronization based on the received SSB, and will not initiate access at other times even if there are random access resources. Based on this, in the above scheme, the starting point of the random access resource of the terminal device is determined based on the SIB19 and / or SSB, so that the random access resources are concentrated in a reasonable time range near the transmission of the SIB19 and / or SSB, reducing the reservation and occupation of other unnecessary access resources, and improving the resource utilization efficiency.

[0010] In a possible implementation manner, the starting point is a time point after a first time length from a first reference point; the first reference point is an end time point of a system information window of the SIB19; or the starting point is a time point after a second time length from a second reference point; the second reference point is a start time point of the system information window of the SIB19; or the starting point is a time point after a third time length from a third reference point; the third reference point is a time domain start time point of a first SIB19 transmitted in the system information window of the SIB19.

[0011] Optionally, the first time length is a cell-level uplink data scheduling delay.

[0012] In the above scheme, the system information window of the SIB19 is used to schedule and transmit the SIB19. Based on the start time point, the end time point or the time domain resource in the system information window of the SIB19 as the reference point, the starting point of the time resource of the random access of the terminal device is determined, so that the random access resource of the terminal device is close to the transmission time of the SIB19. Since the terminal device initiates access only after obtaining ephemeris in the received SIB19, by configuring the random access resource close to the transmission time of the SIB19, the reservation and occupation of other unnecessary access resources can be reduced, and the resource utilization efficiency is improved.

[0013] In a possible implementation, the starting point is a time point after a fourth reference point by a fourth time length; the fourth reference point is a starting time point of a search space of a physical downlink control channel (PDCCH) scheduling the SIB19; or the starting point is a time point after a fifth reference point by a fifth time length; the fifth reference point is an ending time point of a search space of a PDCCH scheduling the SIB19; or the starting point is a time point after a sixth reference point by a sixth time length; the sixth reference point is a starting time point of a time domain resource of a PDCCH scheduling the SIB19; or the starting point is a time point after a seventh reference point by a seventh time length; the seventh reference point is an ending time point of a time domain resource of a PDCCH scheduling the SIB19; or the starting point is a time point after an eighth reference point by an eighth time length; the eighth reference point is a starting time point of a time domain resource of the SSB; or the starting point is a time point after a ninth reference point by a ninth time length; the ninth reference point is an ending time point of a time domain resource of the SSB.

[0014] Similarly, in the foregoing solution, the starting point of the time resource for the random access of the terminal device is determined based on a time point related to the transmission of the SIB19 or the SSB, so that the random access resource of the terminal device is close to the transmission time of the SIB19 or the SSB. Since the terminal device initiates access only after obtaining the ephemeris in the received SIB19 or accesses only after completing synchronization based on the received SSB, by configuring the random access resource close to the transmission time of the SIB19 or the SSB, the reservation and occupation of other unnecessary access resources can be reduced, and the resource utilization efficiency is improved.

[0015] In a possible implementation, the ending time point of the time resource for the random access of the terminal device is a time point after the terminal device receives the SSB by an eleventh time length.

[0016] In the foregoing solution, the ending time point of the random access resource of the terminal device is determined based on a time point after the terminal device receives the SSB, so that the terminal device can quickly perform random access after completing synchronization based on the received SSB, and a large amount of access resources does not need to be reserved, thereby saving resources and improving the resource utilization efficiency.

[0017] In a possible implementation, the ending time point of the time resource for the random access of the terminal device is a time point after the terminal device receives the SIB19 by an eleventh time length.

[0018] In the foregoing solution, the terminal device's random access resource deadline point is determined based on a time point after the terminal device receives the SIB19, so that the terminal device can quickly perform random access after obtaining the ephemeris in the received SIB19, and there is no need to reserve too many access resources, thereby saving resources and improving resource utilization efficiency.

[0019] In a possible implementation, the foregoing starting point is a time domain time point in a periodic random access resource configured by the foregoing network device, and the time resource for the random access of the foregoing terminal device is a first time window in time domain resources included in the periodic random access resource.

[0020] Optionally, the time domain resources further include a second time window, and the second time window is configured for non-contention-based random access.

[0021] In the foregoing solution, the network device can perform random access resource configuration according to the existing standard, and then, the embodiment of the application selects a part of resources in the configured random access resource for the random access of the terminal device, and the remaining random access resources can be used for other purposes, for example, non-contention-based random access. Therefore, the resource utilization rate is improved. The existing random access resource configuration is also compatible, and the implementation is easy.

[0022] In a possible implementation, the foregoing method further includes: the foregoing network device configures non-contention-based random access resources for the foregoing terminal device.

[0023] In the foregoing solution, the access resource of the terminal device is limited in a fixed short time content, but non-contention-based random access of the terminal device can also occur at other times. In order to enable the terminal device to perform random access at other times, other resources are configured for the terminal device for random access.

[0024] In a second aspect, an embodiment of the application provides a communication method, which includes:

[0025] The terminal device receives first configuration information; the first configuration information indicates a starting point of a time resource for random access of the terminal device; and the starting point is determined based on a system information block SIB19 and / or a synchronization signal block SSB.

[0026] The terminal device sends a random access signal in the time resource starting from the foregoing starting point.

[0027] In a possible implementation, the starting point is a time point after a first reference point by a first time length; the first reference point is an ending time point of a system information window of the SIB19; or, the starting point is a time point after a second reference point by a second time length; the second reference point is a starting time point of the system information window of the SIB19; or, the starting point is a time point after a third reference point by a third time length; the third reference point is a time domain starting time point of a first SIB19 transmitted in the system information window of the SIB19.

[0028] In a possible implementation, the first time length is a cell-level uplink data scheduling delay.

[0029] In a possible implementation, the starting point is a time point after a fourth reference point by a fourth time length; the fourth reference point is a starting time point of a search space of a physical downlink control channel PDCCH scheduling the SIB19; or, the starting point is a time point after a fifth reference point by a fifth time length; the fifth reference point is an ending time point of the search space of the physical downlink control channel PDCCH scheduling the SIB19; or, the starting point is a time point after a sixth reference point by a sixth time length; the sixth reference point is a starting time point of a time domain resource of the physical downlink control channel PDCCH scheduling the SIB19; or, the starting point is a time point after a seventh reference point by a seventh time length; the seventh reference point is an ending time point of the time domain resource of the physical downlink control channel PDCCH scheduling the SIB19; or, the starting point is a time point after an eighth reference point by an eighth time length; the eighth reference point is a starting time point of a time domain resource of the SSB; or, the starting point is a time point after a ninth reference point by a ninth time length; the ninth reference point is an ending time point of the time domain resource of the SSB.

[0030] In a possible implementation, the ending time point of the time resource for the random access of the terminal device is a time point after the terminal device receives the SSB by a tenth time length.

[0031] In a possible implementation, the ending time point of the time resource for the random access of the terminal device is a time point after the terminal device receives the SIB19 by an eleventh time length.

[0032] In a possible implementation, the starting point is a time domain time point in a random access resource of one period configured by the network device, and the time resource for the random access of the terminal device is a first time window in a time domain resource included in the random access resource of the period.

[0033] In a possible implementation, the time domain resource further includes a second time window, and the second time window is configured for non-contention-based random access.

[0034] In a possible implementation, the method further includes: receiving, by the terminal device, non-contention-based random access resources configured by the network device.

[0035] In a third aspect, an embodiment of the present application provides a first communication apparatus, configured to execute the method in the first aspect or any possible implementation of the first aspect. The first communication apparatus includes units configured to execute the method in the first aspect or any possible implementation of the first aspect. For example, the first communication apparatus can be a network device or a chip or a functional module, which can be applied to the network device.

[0036] In a fourth aspect, an embodiment of the present application provides a second communication apparatus, configured to execute the method in the second aspect or any possible implementation of the second aspect. The second communication apparatus includes units configured to execute the method in the second aspect or any possible implementation of the second aspect. For example, the second communication apparatus can be a terminal device or a chip or a functional module, which can be applied to the terminal device.

[0037] In a fifth aspect, an embodiment of the present application provides a first communication apparatus, including a processor configured to execute the method in the first aspect or any possible implementation of the first aspect. Alternatively, the processor is configured to execute a program stored in a memory, and the program, when executed, causes the method in the first aspect or any possible implementation of the first aspect to be executed.

[0038] In a possible implementation, the memory is located outside the first communication apparatus.

[0039] In a possible implementation, the memory is located inside the first communication apparatus.

[0040] In the embodiments of the present application, the processor and the memory can also be integrated into one device, i.e., the processor and the memory can also be integrated together. For example, the first communication apparatus can be a chip.

[0041] In a possible implementation, the first communication apparatus further includes a transceiver configured to receive a signal or transmit a signal. For example, the transceiver can also be configured to transmit configuration information, etc. For example, the transceiver can also be configured to receive a random access signal. For example, the first communication apparatus can be a network device.

[0042] In a sixth aspect, an embodiment of the present application provides a second communication apparatus, comprising a processor configured to implement a method recited in the second aspect or any possible implementation of the second aspect. Alternatively, the processor is configured to implement a method recited in the memory when the method is executed.

[0043] In a possible implementation, the memory is located outside the second communication apparatus.

[0044] In a possible implementation, the memory is located inside the second communication apparatus.

[0045] In an embodiment of the present application, the processor and the memory can also be integrated into one device, i.e., the processor and the memory can also be integrated together. For example, the second communication apparatus can be a chip.

[0046] In a possible implementation, the second communication apparatus further comprises a transceiver configured to receive a signal or transmit a signal. For example, the transceiver can also be configured to receive configuration information, etc. For example, the transceiver can also be configured to transmit a random access signal. For example, the second communication apparatus can be a terminal device.

[0047] In a seventh aspect, an embodiment of the present application provides a first communication apparatus, comprising a logic circuit and an interface, wherein the logic circuit and the interface are coupled; the interface is configured to input and / or output information, and the logic circuit is configured to implement a method recited in the first aspect or any possible implementation.

[0048] In an eighth aspect, an embodiment of the present application provides a second communication apparatus, comprising a logic circuit and an interface, wherein the logic circuit and the interface are coupled; the interface is configured to input and / or output information, and the logic circuit is configured to implement a method recited in the second aspect or any possible implementation.

[0049] In a ninth aspect, an embodiment of the present application provides a computer readable storage medium for storing a computer program, which when executed on a computer, causes a method recited in the first aspect or any possible implementation to be implemented.

[0050] In a tenth aspect, an embodiment of the present application provides a computer readable storage medium for storing a computer program, which when executed on a computer, causes a method recited in the second aspect or any possible implementation to be implemented.

[0051] In a eleventh aspect, an embodiment of the present application provides a computer program product, which comprises computer programs or computer codes, when running on a computer, causes the method shown in the first aspect or any possible implementation manner to be executed.

[0052] In a twelfth aspect, an embodiment of the present application provides a computer program product, which comprises computer programs or computer codes, when running on a computer, causes the method shown in the second aspect or any possible implementation manner to be executed.

[0053] In a thirteenth aspect, an embodiment of the present application provides a computer program, when running on a computer, causes the method shown in the first aspect or any possible implementation manner to be executed.

[0054] In a fourteenth aspect, an embodiment of the present application provides a computer program, when running on a computer, causes the method shown in the second aspect or any possible implementation manner to be executed.

[0055] In a fifteenth aspect, an embodiment of the present application provides a communication system, which comprises a network device and a terminal device, the network device is used to execute the method shown in the first aspect or any possible implementation manner of the first aspect, and the terminal device is used to execute the method shown in the second aspect or any possible implementation manner of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1 and FIG. 2 are schematic diagrams of communication system architectures;

[0057] FIG. 3 is a schematic diagram of a method flow provided by an embodiment of the present application;

[0058] FIG. 4 to FIG. 15 are schematic diagrams of time domain position relations provided by embodiments of the present application;

[0059] FIG. 16 to FIG. 18 are schematic diagrams of device structures provided by embodiments of the present application. DETAILED DESCRIPTION

[0060] In embodiments of the present application, "multiple" refers to two or more. In embodiments of the present application, "and / or" is used to describe the associated relationship of the associated objects, which means three kinds of relationships that can exist independently, for example, A and / or B can mean: A exists independently, B exists independently, or A and B exist simultaneously. The description such as "at least one of a1, a2,..., and an (or at least one)" adopted in embodiments of the present application includes any one of a1, a2,..., and an existing independently, and also includes any combination of any number of a1, a2,..., and an, each of which can exist independently; for example, the description of "at least one of a, b, and c" includes the cases of a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or abc in combination. In embodiments of the present application, A / B can mean A or B.

[0061] In various embodiments of the present application, the terms and / or descriptions between various embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0062] The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0063] The method provided by the embodiments of the present application can be applied to a non-terrestrial network (NTN) communication system. As shown in FIG. 1, the NTN communication system includes a terminal device, a satellite (or satellite base station), and a ground station (or also referred to as a gateway).

[0064] The terminal device in the embodiments of the present application is a device with wireless transceiving function. The terminal device can communicate with an access network device (or also referred to as an access device) in a radio access network (RAN). The terminal device can also be referred to as a user equipment (UE), an access terminal, a terminal, a subscriber unit, a subscriber station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a user agent, or a user device, etc. In a possible implementation, the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or can be deployed on water (such as a ship, etc.). In a possible implementation, the terminal device can be a handheld device, a vehicle-mounted device, a wearable device, a sensor, a terminal in Internet of Things (IoT), a terminal in Internet of Vehicles, a drone, a terminal device in a 5th generation (5G) network and future networks, etc. with wireless communication function, and the embodiments of the present application do not limit this.

[0065] In a possible implementation, the terminal device and the terminal device shown in the embodiments of the present application can also communicate through device to device (D2D), machine to machine (M2M), etc.

[0066] In a possible implementation, the terminal device shown in the embodiments of the present application can also be a device in IoT, etc. The IoT network can include Internet of Vehicles, for example. The communication mode in the Internet of Vehicles system is collectively referred to as vehicle to X (V2X, X can represent any thing), for example. The V2X can include vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian (V2P) communication, or vehicle to network (V2N) communication, etc.

[0067] The satellite in the embodiments of this application can provide wireless access services for terminal devices, schedule wireless resources for the accessed terminal devices, and provide reliable wireless transmission protocols and data encryption protocols, etc. The satellite can be a man-made satellite and a high-altitude vehicle, etc. as a base station for wireless communication, such as an evolutional NodeB (eNB) and a next generation node B (gNB), etc. Alternatively, the satellite can also be a relay of these base stations, and transparently transmit the wireless signals of these base stations to the terminal devices. In this case, the ground station can be regarded as a base station for wireless communication. Therefore, in the embodiments of this application, in some embodiments, such as in the regenerative scenario of the satellite, the network device can be the satellite base station shown in FIG. 1; and in some other embodiments, such as in the transparent scenario of the satellite, the network device can be the ground station shown in FIG. 1. In a possible implementation, in different systems of wireless access technologies, the names of the devices with the function of the network device can be different, and the embodiments of this application will not be shown one by one.

[0068] Optionally, the satellite can be a geostationary earth orbit (GEO) satellite, or a medium earth orbit (MEO) satellite or a low earth orbit (LEO) satellite of a none-geostationary earth orbit (NGEO), or a high altitude platform station (HAPS), etc. The embodiments of this application do not limit the specific type of the satellite.

[0069] The ground station in the embodiments of this application can be used to connect the satellite and the core network. For example, when the satellite is a base station for wireless communication, the ground station can transparently transmit the signaling between the satellite and the core network. Alternatively, the ground station can be a base station for wireless communication, and the satellite can transparently transmit the signaling between the terminal device and the ground station. For example, when communicating, the ground station can send the signaling from the core network to the satellite through a feeder link, and the satellite can send the signaling to the terminal device through a service link between the satellite and the terminal device. Correspondingly, the terminal device can also send the signaling to the satellite through the service link, and the satellite can send the signaling to the core network through the ground station.

[0070] In a possible implementation, FIG. 1 only shows one satellite and one ground station, and in actual use, a multi-satellite and / or multi-ground station architecture can be adopted as needed. In this case, each satellite can provide services to one or more terminal devices, each satellite can correspond to one or more ground stations, each ground station can correspond to one or more satellites, and the like, which are not specifically limited in the embodiments of the present application.

[0071] For example, FIG. 2 is a schematic diagram of another NTN communication system architecture provided by the embodiments of the present application. For example, a terminal device can access a network through an air interface (which can be various types of air interfaces, such as a 5G air interface), a base station can be deployed on a satellite (such as a regenerative mode of a satellite), and connected to a core network on the ground through a wireless link. Optionally, there is a wireless link between satellites, so as to complete signaling interaction and user data transmission between base stations and base stations. In another implementation, the base station can also be deployed on the ground and connected to the core network through an optical fiber, and at this time the satellite acts as a transparent forwarding node (such as a transparent mode of a satellite) and undertakes the function of transparent data forwarding.

[0072] For example, the various network elements in FIG. 2 and their interfaces can be as follows: a terminal device can access a satellite network through an air interface and initiate a call or Internet access service. A base station can be used to provide wireless access services, schedule wireless resources for accessing terminal devices, provide reliable wireless transmission protocols and data encryption protocols, and the like. A ground station can be used to forward signaling and service data between a satellite base station and a core network. The core network can be used for user access control, mobility management, session management, user security authentication, or billing, and the like. The core network can be composed of multiple functional units, such as functional entities including a control plane and a data plane. For example, as shown in FIG. 2, the core network can include an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), and the like. For example, the AMF can be used to manage user access, security authentication, and mobility management, and the like. The UPF can be used to manage the transmission of user plane data and traffic statistics, and the like.

[0073] For example, the air interface shown in FIG. 2 can be understood as a wireless link between a terminal and a base station; the Xn interface can be understood as an interface between base stations, mainly for signaling interaction such as handover; the NG interface can be used as an interface between a base station and a core network, for interacting with the core network non-access (NAS) signaling and user service data.

[0074] The network architecture and service scenarios described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0075] Exemplarily, the NTN satellite communication system described above can be integrated with the following network systems: an internet of things (IoT), a vehicle to X (V2X), a narrow band internet of things (NB-IoT), an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a long term evolution (LTE) system, a 5th-generation (5G) communication system, a 6th-generation (6G) communication system, or a future communication system. The embodiments of the present application do not limit this.

[0076] However, the biggest feature of satellite communication is large round-trip transmission delay, and terminal devices need to perform frequent beam and cell switching due to the movement of satellites. Based on this, if the random access resources are configured according to the existing standard, the time of reserved resources will be too long, and the resource utilization rate will be reduced. Specifically, the random access resources in the existing standard are periodic. The network device indicates the index in the corresponding random access resource table through indication, and the terminal device can obtain the specific period and the position of the random access resource in a random access resource period. For ease of understanding, an example of a table in the existing standard is taken, for example, see Table 1.

[0077] In Table 1, the first column indicates the physical random access channel (PRACH) configuration index indicated by the network device. The second column indicates the format of the random access sequence, referred to as the preamble format. The third column indicates the period of the random access resource (in frames). The fourth column indicates the frame number of the period starting point. The fifth column indicates the subframe number of the random access resource in the period. The sixth column indicates the starting symbol in each subframe. For other formats of random access sequences, the occupied time is relatively short, for example, one subframe includes multiple time slots, and one subframe may include multiple random access time slots or occasions. Therefore, the last two columns are the number of random access occasions and the duration in one subframe for other formats.

[0078] Table 1

[0079] Since the random access resource of the existing standard is periodic, the starting point can be flexibly configured. However, the terminal device often needs to obtain some synchronization information before initiating random access after synchronization. For example, in the satellite communication scenario, the terminal device will initiate access only after obtaining the ephemeris in the system information block 19 (SIB19). Before obtaining the ephemeris, the terminal device will not use the random access resource. This leads to waste of access resources. In another implementation, the terminal device needs to synchronize with the network device before initiating random access, otherwise it will affect the performance of access. The terminal device relies on the synchronization signal block (SSB) sent by the network device to realize downlink synchronization. Exemplarily, the SSB is periodically sent by the network device. However, in the satellite communication scenario, due to the large coverage area and limited SSB beams, the period of the SSB signal may be lengthened. This leads to the fact that the terminal device cannot complete synchronization for a long time, and even if the random access resource is configured, it will not be used. This leads to waste of access resources.

[0080] Based on the above description, the terminal device will basically initiate random access within a period of time after receiving SIB19 and / or receiving SSB. According to the existing periodic access resource configuration, the random access resource will be wasted. Therefore, in order to reduce the waste of random access resource reservation and improve resource utilization, the embodiment of the present application provides a communication method and related apparatus. The following will be exemplarily introduced.

[0081] First, a communication method provided by the embodiment of the present application is introduced. It can be exemplarily referred to FIG. 3. The method can include but is not limited to the steps shown in S301 to S304.

[0082] S301, the network device sends first configuration information to the terminal device; the first configuration information indicates a starting point of a time resource of random access of the terminal device; the starting point is determined based on a system information block SIB19 and / or a synchronization signal block SSB.

[0083] Exemplarily, the network device may, for example, be a satellite base station or a ground station shown in FIG. 1 or FIG. 2, etc. The terminal device may, for example, be a terminal device shown in FIG. 1 or FIG. 2.

[0084] Exemplarily, the network device can send the first configuration information to the terminal device in the form of a broadcast message. The first configuration information can indicate the starting point of the time resource of random access to the terminal device. In order to facilitate subsequent description, the time resource of random access of the terminal device is referred to as target time resource.

[0085] In a possible example, after receiving the random access request of the terminal device, the network device can determine a time reference point in response to the request. Then, the first configuration information indicates a time domain position relationship of the starting point of the target time resource relative to the time reference point. The time domain position relationship of the starting point relative to the time reference point can be understood as a time offset of the starting point relative to the time reference point. The time offset can be represented by a time length of an interval between the starting point and the time reference point. For example, in one implementation, the first configuration information can indicate the time reference point and a time length of an interval between the starting point of the target time resource and the time reference point. So that the terminal device can determine the starting point of the target time resource based on the time reference point and the time length of the interval. Alternatively, in another implementation, the time reference point can be agreed in advance through a protocol. Then, the first configuration information can indicate a time length of an interval between the starting point of the target time resource and the time reference point. So that the terminal device can determine the starting point of the target time resource based on the agreed time reference point and the time length of the interval. The time length of the interval can be exemplified by any of the first time length to the ninth time length below, which will not be described here.

[0086] The time reference point, the time length of the interval, and the starting point of the target time resource are exemplarily introduced below.

[0087] In one example, the time reference point can be a time point of an end of a system information window (SI window) of the SIB 19. The system information window is a time window for scheduling the SIB 19. The starting point of the target time resource can be a time point after a first time length from the time point of the end of the SI window of the SIB 19. For ease of understanding, reference can be made to FIG. 4. In FIG. 4, a time domain position relationship between the SI window of the SIB 19 and the target time resource is shown. It can be seen that the time point of the end of the SI window of the SIB 19 (for example, the first time point in FIG. 4) and the starting point of the target time resource (for example, the second time point in FIG. 4) are separated by the first time length. The target time resource is used for random access of the terminal device. After successful random access, the terminal device can perform service transmission. Based on this, in FIG. 4, the target time resource is followed by a service resource. It can be understood that FIG. 4 is only an example and does not constitute a limitation on the embodiments of the present application.

[0088] Exemplarily, the first time length can be greater than or equal to 0. If the value of the first time length is 0, the starting point of the target time resource is the end time point of the SI window of the SIB19. If the value of the first time length is greater than 0, this is mainly to consider one or more of the scheduling delay, signal transmission delay, or terminal side signal processing delay of the communication system, so that the network device cannot receive the random access signal immediately after transmitting the SIB19. In addition, on the terminal side, even if the random access is initiated from the end time point of the SI window of the SIB19, the network device cannot immediately receive the random access signal. Therefore, the terminal device can be configured to use the time point after the end time point of the SI window of the SIB19 by the first time length as the starting time point of the random access resource. Thus, the access resource of the terminal device is accurately configured, and the waste of resources is reduced by reserving too much access resource.

[0089] In a possible implementation, the first time length can be, for example, a cell-level uplink data scheduling delay Koffset. It can be understood that this is only an example and does not constitute a limitation on the embodiments of the present application. The specific value of the first time length can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0090] Exemplarily, the SI window of the SIB19 can be configured by the network device to the terminal device through the SIB1 broadcast message. That is, the terminal device can obtain the SI window of the SIB19 by receiving the SIB1 broadcast message. That is, the starting time point and the end time point of the SI window are obtained.

[0091] In an example, the time reference point can be the starting time point of the SI window of the SIB19. The starting point of the target time resource can be a time point after the starting time point of the SI window of the SIB19 by a second time length. For ease of understanding, reference can be made to FIG. 5. In FIG. 5, a time domain position relationship between the SI window of the SIB19 and the target time resource is shown. It can be seen that the starting time point (for example, the first time point in FIG. 5) of the SI window of the SIB19 and the starting point (for example, the second time point in FIG. 5) of the target time resource are separated by the second time length. The target time resource is used for random access of the terminal device. After the random access is successful, the terminal device can perform service transmission. Based on this, in FIG. 5, the target time resource is followed by a service resource. It can be understood that FIG. 5 is only an example and does not constitute a limitation on the embodiments of the present application.

[0092] Exemplarily, the second time length can be greater than or equal to 0. Alternatively, the second time length can be greater than or equal to the length of the SI window of the SIB19. If the value of the second time length is the length of the SI window of the SIB19, the starting point of the target time resource is the end time point of the SI window of the SIB19. If the value of the second time length is greater than the length of the SI window of the SIB19, this mainly considers one or more of the following delays: scheduling delay, signal transmission delay, or terminal-side signal processing delay, so that in the implementation process, the network device cannot receive the random access signal immediately after transmitting the SIB19. In addition, on the terminal side, even if the random access is initiated from the end time point of the SI window of the SIB19, the network device cannot immediately receive the random access signal. Therefore, the second time length can be greater than the length of the SI window of the SIB19. So that the terminal device can initiate random access after a period of time after the end time point of the SI window of the SIB19 (for example, the third time point in FIG. 5). Thus, the access resource of the terminal device is accurately configured, and the waste of resources is reduced by reserving too much access resource. It can be understood that this is only an example and does not constitute a limitation on the embodiments of the present application. The specific value of the second time length can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0093] In an example, in the SI window of the SIB19, the network device can transmit one or more SIB19s. Then, the time reference point can be the time domain starting time point of the first SIB19 transmitted in the SI window of the SIB19. The starting point of the target time resource can be the time point after the third time length from the time domain starting time point of the first SIB19. For ease of understanding, reference can be made to FIG. 6. In FIG. 6, a time domain position relationship between the SI window of the SIB19 and the target time resource is shown. In FIG. 6, the position of the time domain resource of the first SIB19 transmitted in the SI window is also exemplarily shown. As can be seen in FIG. 6, the starting time point of the time domain resource of the first SIB19 (for example, the first time point shown in FIG. 6) and the starting point of the target time resource (for example, the second time point in FIG. 6) are separated by the third time length. The target time resource is used for random access of the terminal device. After successful random access, the terminal device can perform service transmission. Based on this, in FIG. 6, the target time resource is followed by a service resource. It can be understood that FIG. 6 is only an example and does not constitute a limitation on the embodiments of the present application.

[0094] Exemplarily, the third time length can be greater than or equal to 0. Alternatively, the third time length can be greater than or equal to a first threshold. The first threshold is a time length between a starting time point of the time domain resource for transmitting the first SIB19 and an ending time point of the SI window of the SIB19 (for example, the third time point shown in FIG. 6). If the third time length is equal to the first threshold, the starting point of the target time resource is the ending time point of the SI window of the SIB19. If the third time length is greater than the first threshold, this mainly considers one or more of the following delays: scheduling delay, signal transmission delay, or terminal-side signal processing delay, so that the network device cannot receive the random access signal immediately after transmitting the SIB19. In addition, on the terminal side, even if the random access is initiated from the ending time point of the SI window of the SIB19, the network device cannot immediately receive the random access signal. Therefore, the third time length can be greater than the first threshold. So that the terminal device can initiate random access after a period of time after the ending time point of the SI window of the SIB19. Thus, the access resource of the terminal device is accurately configured, and the waste of resources is reduced by reducing the excessive reservation of access resources. It can be understood that this is only an example and does not constitute a limitation on the embodiments of the present application. The specific value of the third time length can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0095] Exemplarily, since the SI window of the SIB19 and the time domain resource for transmitting the first SIB19 are configured by the network device, the network device can calculate the first threshold. Thus, the network device can determine the third time length by referring to the first threshold, and then indicate the third time length through the first configuration information. In addition, the terminal device can also obtain the time domain resource for transmitting the first SIB19 from the resource configuration information of the network device, that is, determine the starting time point of the time domain resource. Then, the terminal device can determine the starting point of the target time resource based on the third time length indicated by the first configuration information.

[0096] In an example, the time reference point can be a starting time point of a search space of a physical downlink control channel (PDCCH) scheduling the SIB19. First, the search space is introduced. Different PDCCHs are distinguished by a cell identifier (C-RNTI). The network device configures a set of candidate PDCCHs for the terminal device to acquire downlink control information (DCI) through high-layer signaling (for example, radio resource control (RRC) signaling). The DCI is carried in the PDCCH. The DCI includes time-frequency resources configured for the terminal device for uplink and / or downlink transmission. The terminal device does not know in advance which candidate PDCCH or which candidate PDCCHs in the set of candidate PDCCHs will receive the DCI. However, the terminal device can know what downlink control information it currently expects to receive according to the configuration information of the network device. Therefore, the terminal device attempts to decode each candidate PDCCH in the set of candidate PDCCHs according to the configuration information. If the decoding is successful, the terminal device knows that the successfully decoded DCI information is sent to itself. The set of candidate PDCCHs is a set of search spaces, simply referred to as a search space.

[0097] If the time reference point is the starting time point of the search space of the PDCCH, the starting point of the target time resource can be a time point after the fourth time duration from the starting time point of the search space. For ease of understanding, reference can be made to FIG. 7. In FIG. 7, a time-domain position relationship between the SI window of the SIB19, the search space of the PDCCH scheduling the SIB19, and the target time resource is shown. It can be seen that the search space of the PDCCH is in the SI window of the SIB19. The starting time point of the search space of the PDCCH (for example, the first time point in FIG. 7) and the starting point of the target time resource (for example, the second time point in FIG. 7) are separated by the fourth time duration. The target time resource is used for random access of the terminal device. After the random access is successful, the terminal device can perform service transmission. Based on this, in FIG. 7, the target time resource is followed by a service resource. It can be understood that FIG. 7 is only an example and does not constitute a limitation on the embodiments of the present application.

[0098] Exemplarily, the fourth time length can be greater than or equal to 0. Alternatively, the fourth time length can be greater than or equal to a second threshold. The second threshold is a time length between a starting time point of the search space of the PDCCH scheduling the SIB 19 and an ending time point of the SI window of the SIB 19 (for example, the third time point shown in FIG. 7). If the fourth time length is equal to the second threshold, the starting point of the target time resource is the ending time point of the SI window of the SIB 19. If the fourth time length is greater than the second threshold, this mainly considers that there is one or more of scheduling delay, signal transmission delay or terminal side signal processing delay in the communication system, so that the network device cannot receive the random access signal immediately after sending the SIB 19. In addition, on the terminal side, even if the random access is initiated from the ending time point of the SI window of the SIB 19, the network device cannot immediately receive the random access signal. Therefore, the fourth time length can be greater than the second threshold. So that the terminal device can initiate random access after a period of time after the ending time point of the SI window of the SIB 19. Thus, the access resource of the terminal device is accurately configured, and the waste of resources is reduced by reducing the excessive reserved access resource. It can be understood that this is only an example and does not constitute a limitation on the embodiments of the present application. The specific value of the fourth time length can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0099] Exemplarily, since the SI window of the SIB 19 and the search space of the PDCCH scheduling the SIB 19 are configured by the network device, the network device can calculate the second threshold. Thus, the network device can determine the fourth time length by referring to the second threshold, and then indicate the fourth time length through the first configuration information. In addition, the terminal device can also obtain the search space of the PDCCH from the resource configuration information of the network device. That is, the starting time point of the search space is determined. Then, the terminal device can determine the starting point of the target time resource based on the fourth time length indicated by the first configuration information.

[0100] In an example, the time reference point can be a search space end time point of a PDCCH scheduling the SIB19. The start point of the target time resource can be a time point after a fifth time duration from the search space end time point. For ease of understanding, reference can be made to FIG. 8. In FIG. 8, a time domain position relationship between an SI window of the SIB19, a search space of a PDCCH scheduling the SIB19, and a target time resource is shown. It can be seen that the search space of the PDCCH is in the SI window of the SIB19. The search space end time point of the PDCCH (e.g., the first time point in FIG. 8) and the start point of the target time resource (e.g., the second time point in FIG. 8) are separated by the fifth time duration. The target time resource is used for random access of the terminal device. After successful random access, the terminal device can perform service transmission. Based on this, in FIG. 8, the target time resource is followed by a service resource. It can be understood that FIG. 8 is only an example and does not constitute a limitation on the embodiments of the present application.

[0101] In an example, the value of the fifth time duration can be greater than or equal to 0. Alternatively, the value of the fifth time duration can be greater than or equal to a third threshold value. The third threshold value is a time duration between the search space end time point of the PDCCH scheduling the SIB19 and an SI window end time point of the SIB19 (e.g., the third time point in FIG. 8). If the value of the fifth time duration is the third threshold value, the start point of the target time resource is the SI window end time point of the SIB19. If the value of the fifth time duration is greater than the third threshold value, this mainly takes into account one or more of the following delays: scheduling delay, signal transmission delay, or terminal side signal processing delay, etc., so that in the implementation process, the network device cannot receive the random access signal immediately after transmitting the SIB19. In addition, on the terminal side, even if the random access is initiated from the SI window end time point of the SIB19, the network device cannot immediately receive the random access signal. Therefore, the fifth time duration can be configured to be greater than the third threshold value. This allows the terminal device to initiate random access after a period of time after the SI window end time point of the SIB19. Thus, the access resource of the terminal device is accurately configured, further reducing the excessive reservation of access resources to reduce resource waste. It can be understood that this is only an example and does not constitute a limitation on the embodiments of the present application. The specific value of the fifth time duration can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0102] Exemplarily, since the SI window of the SIB19 and the search space of the PDCCH scheduling the SIB19 are configured by the network device, the network device can calculate the third threshold. Thus, the network device can determine the fifth time length by referring to the third threshold, and then indicate the fifth time length through the first configuration information. Moreover, the terminal device can also obtain the search space of the PDCCH from the resource configuration information of the network device, i.e., determine the end time point of the search space. Then, the terminal device can determine the start point of the target time resource based on the fifth time length indicated by the first configuration information.

[0103] In an example, the time reference point can be a start time point of a time domain resource of the PDCCH scheduling the SIB19. The start point of the target time resource can be a time point after the start time point of the time domain resource of the PDCCH by a sixth time length. For ease of understanding, reference can be made to FIG. 9. In FIG. 9, a schematic diagram of a time domain position relationship among the SI window of the SIB19, the time domain resource of the PDCCH scheduling the SIB19, and the target time resource is shown. It can be seen that the time domain resource of the PDCCH is in the SI window of the SIB19. The start time point of the time domain resource of the PDCCH (e.g., the first time point in FIG. 9) and the start point of the target time resource (e.g., the second time point in FIG. 9) are separated by the sixth time length. The target time resource is used for random access of the terminal device. After the random access is successful, the terminal device can perform service transmission. Based on this, in FIG. 9, the target time resource is followed by a service resource. It can be understood that FIG. 9 is only an example and does not constitute a limitation on the embodiments of the present application.

[0104] Exemplarily, the sixth time length can be greater than or equal to 0. Alternatively, the sixth time length can be greater than or equal to a fourth threshold. The fourth threshold is a time length between a starting time point of a time domain resource of the PDCCH scheduling the SIB 19 and an ending time point of the SI window of the SIB 19 (for example, the third time point shown in FIG. 9). If the sixth time length is equal to the fourth threshold, the starting point of the target time resource is the ending time point of the SI window of the SIB 19. If the sixth time length is greater than the fourth threshold, this mainly considers that there is one or more of a scheduling delay, a signal transmission delay, or a terminal-side signal processing delay in the communication system, so that the network device cannot receive the random access signal immediately after sending the SIB 19. In addition, on the terminal side, even if the random access is initiated from the ending time point of the SI window of the SIB 19, the network device cannot immediately receive the random access signal. Therefore, the sixth time length can be greater than the fourth threshold. So that the terminal device can initiate random access after a period of time after the ending time point of the SI window of the SIB 19. Thus, the access resource of the terminal device is accurately configured, and the waste of resources is reduced by reducing the excessive reservation of access resources. It can be understood that this is only an example and does not constitute a limitation on the embodiments of the present application. The specific value of the sixth time length can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0105] Exemplarily, since the SI window of the SIB 19 and the time domain resource of the PDCCH scheduling the SIB 19 are configured by the network device, the network device can calculate the fourth threshold. Thus, the network device can determine the sixth time length by referring to the fourth threshold, and then indicate the sixth time length through the first configuration information. In addition, the PDCCH scheduling the SIB 19 is a candidate PDCCH in the search space of the PDCCH, and the network device configures the search space to the terminal device. After the terminal device successfully decodes the PDCCH scheduling the SIB 19, the terminal device can determine the time domain resource of the PDCCH scheduling the SIB 19 based on the search space. That is, the starting time point of the time domain resource can be determined. Then, the terminal device can determine the starting point of the target time resource based on the sixth time length indicated by the first configuration information.

[0106] In an example, the time reference point can be a time point at which the time domain resource of the PDCCH scheduling the SIB 19 ends. The start point of the target time resource can be a time point at which the seventh time length elapses from the time point at which the time domain resource of the PDCCH scheduling the SIB 19 ends. For ease of understanding, reference can be made to FIG. 10. In FIG. 10, a schematic diagram of the time domain position relationship between the SI window of the SIB 19, the time domain resource of the PDCCH scheduling the SIB 19, and the target time resource is shown. It can be seen that the time domain resource of the PDCCH is in the SI window of the SIB 19. The time point at which the time domain resource of the PDCCH ends (for example, the first time point in FIG. 10) and the start point of the target time resource (for example, the second time point in FIG. 10) are separated by the seventh time length. The target time resource is used for random access of the terminal device. After the random access is successful, the terminal device can perform service transmission. Based on this, in FIG. 10, the target time resource is followed by a service resource. It can be understood that FIG. 10 is merely an example and does not constitute a limitation on the embodiments of the present application.

[0107] In an example, the value of the seventh time length can be greater than or equal to 0. Alternatively, the value of the seventh time length can be greater than or equal to a fifth threshold value. The fifth threshold value is the time length between the time point at which the time domain resource of the PDCCH scheduling the SIB 19 ends and the time point at which the SI window of the SIB 19 ends (for example, the third time point in FIG. 10). If the value of the seventh time length is the fifth threshold value, the start point of the target time resource is the time point at which the SI window of the SIB 19 ends. If the value of the seventh time length is greater than the fifth threshold value, this is mainly to take into account one or more of the following delays: scheduling delay, signal transmission delay, or terminal-side signal processing delay, so that in the implementation process, the network device cannot receive the random access signal immediately after transmitting the SIB 19. In addition, on the terminal side, even if the random access is initiated from the time point at which the SI window of the SIB 19 ends, the network device cannot immediately receive the random access signal. Therefore, the seventh time length can be configured to be greater than the fifth threshold value. This enables the terminal device to initiate random access after a period of time after the time point at which the SI window of the SIB 19 ends. Thus, the access resource of the terminal device is accurately configured, and the waste of resources is reduced by reducing the excessive reservation of access resources. It can be understood that this is merely an example and does not constitute a limitation on the embodiments of the present application. The specific value of the seventh time length can be set according to actual application needs, and the embodiments of the present application are not specifically limited.

[0108] Exemplarily, since the SI window of the SIB19 and the time domain resource of the PDCCH scheduling the SIB19 are configured by the network device, the network device can calculate the fifth threshold. Thus, the network device can determine the seventh time length by referring to the fifth threshold, and then indicate the seventh time length through the first configuration information. In addition, the PDCCH scheduling the SIB19 belongs to the candidate PDCCH in the search space of the PDCCH, and the network device configures the search space to the terminal device. After the terminal device successfully decodes the PDCCH scheduling the SIB19, the terminal device can determine the time domain resource of the PDCCH scheduling the SIB19 in combination with the search space. That is, the terminal device can determine the end time point of the time domain resource. Then, the terminal device can determine the start point of the target time resource based on the seventh time length indicated by the first configuration information.

[0109] In an example, the time reference point can be a start time point of a time domain resource of the SSB. In a specific implementation, the SSB is transmitted by the network device to the terminal device before the network device broadcasts the SIB1. The SSB is used by the terminal device to implement synchronization with the network device. Based on this, the start point of the target time resource can be a time point after the start time point of the time domain resource of the SSB by the eighth time length. For ease of understanding, reference can be made to FIG. 11. In FIG. 11, a schematic diagram of a time domain position relationship between a time domain resource of an SSB, a time domain resource of a SIB1, a SI window of a SIB19, and a target time resource is shown. It can be seen that the SSB is transmitted before the SIB1. The SI window of the SIB19 is after the time domain resource of the SIB1, because the SI window of the SIB19 is configured by the SIB1. The start time point of the time domain resource of the SSB (for example, the first time point in FIG. 11) and the start point of the target time resource (for example, the second time point in FIG. 11) are separated by the eighth time length. The target time resource is used for random access of the terminal device. After the random access is successful, the terminal device can perform service transmission. Based on this, in FIG. 11, the target time resource is followed by a service resource. It can be understood that FIG. 11 is only an example, and does not constitute a limitation on the embodiments of the present application.

[0110] Exemplarily, the eighth time length can be greater than or equal to 0. The specific value can be set according to actual application needs, and the embodiments of the present application do not specifically limit this.

[0111] Exemplarily, the network device can configure the terminal device with the time domain resource of the SSB, so that the terminal device can receive the SSB in the time domain resource. Therefore, the terminal device can know the start time point of the time domain resource of the SSB. Then, the terminal device can determine the start point of the target time resource based on the first configuration information.

[0112] In an example, the time reference point can be an end time point of the time domain resource for transmitting the SSB. The start point of the target time resource can be a time point after a ninth time length from the end time point of the time domain resource for transmitting the SSB. For ease of understanding, reference can be made to FIG. 12. In FIG. 12, a schematic diagram of time domain position relationship between the time domain resource for transmitting the SSB, the time domain resource for transmitting the SIB1, the SI window of the SIB19, and the target time resource is shown. It can be seen that the end time point of the time domain resource for transmitting the SSB (e.g., the first time point in FIG. 12) and the start point of the target time resource (e.g., the second time point in FIG. 12) are separated by the ninth time length. The target time resource is used for random access of the terminal device. After successful random access, the terminal device can perform service transmission. Based on this, in FIG. 12, the target time resource is followed by a service resource. It can be understood that FIG. 12 is only an example and does not constitute a limitation on the embodiments of the present application.

[0113] In an example, the value of the ninth time length can be greater than or equal to 0. The specific value can be set according to actual application needs, and the embodiments of the present application do not specifically limit it.

[0114] In an example, the network device can configure the terminal device with the time domain resource for transmitting the SSB, so that the terminal device can receive the SSB in the time domain resource. Therefore, the terminal device can know the end time point of the time domain resource for transmitting the SSB. Further, the terminal device can determine the start point of the target time resource based on the first configuration information.

[0115] In an example, the time reference point can be the time when the terminal device receives the SSB. Then, the start point of the target time resource can be the time when the terminal device receives the SSB, or a certain preset time point after the time. For details, reference can be made to the foregoing description, which will not be repeated here.

[0116] In an example, the time reference point can be the time when the terminal device receives the SIB19. Then, the start point of the target time resource can be the time when the terminal device receives the SIB19, or a certain preset time point after the time. For details, reference can be made to the foregoing description, which will not be repeated here.

[0117] It can be understood that the time reference point and the start point of the target time resource described above are only examples and do not constitute a limitation on the embodiments of the present application. Based on the above description, it can be known that one of the main purposes of the embodiments of the present application is to concentrate the target time resource in a specific time period. The specific time period is as close as possible to the time period after the terminal device receives the SIB19 and / or SSB. Based on this, in some possible implementation manners, the time reference point described above can be any one of the time reference points that can be explicitly defined in the time domain resource for transmitting the SIB19 and / or SSB or the time domain resource for scheduling the SIB19 and / or SSB, and the embodiments of the present application will not be described one by one.

[0118] In a possible implementation manner, after the start point of the target time resource is determined, the duration period or the deadline point of the target time resource also needs to be determined, so as to finally determine the target time resource. Exemplarily, the duration period or the deadline point of the target time resource can be determined by a protocol or indicated by the network device to the terminal device, and the like. Exemplary descriptions are given below.

[0119] In an example, the deadline point of the target time resource can be a time point after a tenth time length after the terminal device receives the SSB. The value of the tenth time length can be set according to actual application needs, for example, can be 10 milliseconds or 20 milliseconds, and the like, and the embodiments of the present application are not specifically limited. For ease of understanding, reference can be made to FIG. 13 exemplarily.

[0120] In FIG. 13, a schematic diagram of time-domain location relationship between a terminal device receiving an SSB, a time-domain resource of transmitting SIB1, an SI window of SIB19 and a target time resource is shown. It can be seen that SIB1 is transmitted after the terminal device receives the SSB. The SI window of SIB19 is after the time-domain resource of transmitting SIB1, because the SI window of SIB19 is configured by SIB1. The determination of the starting point of the target transmission resource (for example, the first time point shown in FIG. 13, the position of which is only a schematic) can refer to the foregoing description, and will not be described here. The third time point shown in FIG. 13 can be the deadline of the target time resource. The second time point shown in FIG. 13 can be the time when the terminal device receives the SSB. The second time point and the third time point are separated by a tenth time length. As can be seen in FIG. 13, the duration of the target time resource is the time period between the first time point and the third time point. In an example, if the starting point of the target time resource is the time when the terminal device receives the SSB, that is, the starting point of the target time resource is the second time point shown in FIG. 13. Then the duration of the target time resource is within the tenth time length after the terminal device receives the SSB. That is, the time period between the second time point and the third time point. It can be understood that FIG. 13 is only an example and does not constitute a limitation on the embodiments of the present application.

[0121] Exemplarily, if the duration of the target time resource or the deadline is agreed by the protocol. Then the protocol can agree that the time point after the terminal device receives the SSB and the tenth time length is the deadline of random access. Or, if the duration of the target time resource is within the tenth time length after the terminal device receives the SSB. Then the protocol can agree that the random access resource within the tenth time length after the terminal device receives the SSB is available or effective. That is, within the tenth time length, the terminal device can initiate access through the random access resource configured by the network device. That is, in a specific implementation, the terminal device learns the duration of the target time resource or the deadline based on the protocol deployed by itself.

[0122] Exemplarily, if the duration of the target time resource or the deadline is indicated by the network device to the terminal device, the network device can send indication information to the terminal device. The indication information indicates that the time point after the terminal device receives the SSB and the tenth time length is the deadline of random access. Or, if the duration of the target time resource is within the tenth time length after the terminal device receives the SSB. Then the indication information can indicate that the random access resource within the tenth time length after the terminal device receives the SSB is available or effective.

[0123] In an example, the deadline point of the target time resource can be a time point after the terminal device receives the SIB19 by an eleventh time length. The value of the eleventh time length can be set according to actual application needs, for example, can be 10 milliseconds or 20 milliseconds, etc., and the embodiments of the present application are not specifically limited. For ease of understanding, see FIG. 14 for example.

[0124] In FIG. 14, a schematic diagram of the time domain position relationship between the terminal device receiving SIB19, the SI window of SIB19 and the target time resource is shown. It can be seen that the terminal device receives SIB19 in the SI window of SIB19. The determination of the starting point of the target transmission resource (for example, the first time point shown in FIG. 14, which is only one example) can refer to the foregoing description, and will not be repeated here. The third time point shown in FIG. 14 can be the deadline point of the target time resource. The second time point shown in FIG. 14 can be the time when the terminal device receives SIB19. The second time point and the third time point are separated by an eleventh time length. As can be seen in FIG. 14, the duration of the target time resource is the time period between the first time point and the third time point. In an example, if the starting point of the target time resource is the time when the terminal device receives the SIB19, that is, the starting point of the target time resource is the second time point shown in FIG. 14. Then the duration of the target time resource is within the eleventh time length after the terminal device receives the SIB19. That is, the time period between the second time point and the third time point. It can be understood that FIG. 14 is only an example and does not constitute a limitation on the embodiments of the present application.

[0125] For example, if the duration of the target time resource or the deadline point is agreed by the protocol. Then the protocol can agree that the time point after the terminal device receives SIB19 by an eleventh time length is the deadline point of random access. Or, if the duration of the target time resource is within the eleventh time length after the terminal device receives SIB19. Then the protocol can agree that the random access resource within the eleventh time length after receiving SIB19 is available or effective for the terminal device. That is, within the eleventh time length, the terminal device can initiate random access. That is, in a specific implementation, the terminal device learns the duration of the target time resource or the deadline point based on the protocol deployed by itself.

[0126] Exemplarily, if the duration period or the deadline point of the target time resource is indicated by the network device to the terminal device, the network device can send indication information to the terminal device. The indication information indicates that the terminal device takes a time point after the eleventh time length after receiving the SIB19 as the deadline point of random access. Or, if the duration period of the target time resource is within the eleventh time length after the terminal device receives the SIB19, the indication information can indicate that the random access resource within the eleventh time length after receiving the SIB19 is available or valid.

[0127] In a possible implementation, the network device can first configure periodic random access resources according to the existing standard. Then, select a part of resources in each periodically configured random access resource for random access of the terminal device. The part of resources can be referred to as valid resources. That is, the valid resources are resources in the each periodically configured random access resource that allow the terminal device to use for random access. The resources in the each periodically configured random access resource other than the valid resources can be referred to as invalid resources. That is, the invalid resources are not random access resources of the terminal device.

[0128] Exemplarily, the valid resources can include time domain resources and frequency domain resources. The time domain resources in the valid resources can be understood as the target time resource. It can be understood that the time domain resources in the valid resources are a time window of the time domain resources included in the each periodically configured random access resource. The time window can be referred to as a valid resource window. That is, the time resource for random access of the terminal device is a time window of the time domain resources included in the each periodically configured random access resource. Similarly, the valid resources can be determined by configuring a start time point and a duration, or by configuring a start time point and a deadline point. The start time point of the valid resources is a time domain time point in the each periodically configured random access resource. The specific implementation of configuring the start time point and the duration (or the deadline point) of the valid resources can correspond to the description of the start time point and the duration (or the deadline point) of the target time resource, which is not described here.

[0129] To better understand the implementation of the present application, the following is an example of a network device configuring a periodic random access resource to a terminal device. Exemplarily, in a specific implementation, a terminal device can send a random access request to a network device. The network device sends a random access response to the terminal device in response to the request. The random access response includes a random access resource, which belongs to a resource within a period. Exemplarily, the specific random access resource can be indicated in the random access response by the PRACH configuration index, the preamble format, the period of the random access resource, the frame number of the starting point of the period, the subframe number of the random access resource within the period, and the starting symbol in each subframe, etc. shown in Table 1.

[0130] After the terminal device receives the above random access response, it can know the alternative random access resource within a period. Then, the network device can also send the above first configuration information to the terminal device to indicate the starting point of the effective resource for the terminal device to randomly access. The determination of the starting point can be referred to the foregoing description, which will not be repeated here. Then, the duration or the deadline of the effective resource is indicated to the terminal device by protocol agreement or by the network device. The specific implementation can also be referred to the foregoing description, which will not be repeated here.

[0131] In a possible implementation, reference can be made to FIG. 15. FIG. 15 exemplarily shows the time domain distribution of the effective resource and the non-effective resource in each period. Taking period 1 in FIG. 15 as an example. It can be seen that the period 1 can be configured with SI window of SIB19, service resource and random access resource of the terminal device, etc. The random access resource of the terminal device is the above effective resource. The time domain window corresponding to the effective resource is the above effective resource window, as shown in FIG. 15. In addition to the effective resource window, the period 1 also includes a non-effective resource window. The random access resource in the non-effective resource window is not used for the terminal device to perform random access. In a possible implementation, the random access resource in the non-effective resource window can be configured for the competitive or non-competitive random access of other terminal devices. Thus, the resources are fully utilized and the resource waste is reduced.

[0132] Exemplarily, the effective resource window and the ineffective resource window described above can also be periodic. For example, the effective resource window can be a time window at the same position in each period described above, and the ineffective resource window can also be a time window at the same position in each period described above. For example, the effective resource window and the ineffective resource window in the period 1 and the period 2 shown in FIG. 15. For example, the period of the effective resource window and the ineffective resource window is similar to a discontinuous reception (DRX) period. The DRX period off time period is the effective resource window, and the DRX period on time period is the ineffective resource window.

[0133] It can be understood that the diagram shown in FIG. 15 is only an example and does not constitute a limitation on the embodiments of the present application.

[0134] In a possible implementation manner, the period in the periodic random access resource described above can be an SSB period or can be another self-defined time period, and the embodiments of the present application do not limit this. In a possible implementation manner, the self-defined time period can be configured as a shorter time period, for example, less than the SSB period. One effective resource window described above can be configured in each period, so that the terminal device can be configured with more intensive random access resources. In order to facilitate the terminal device to access the network side in time and improve the user experience.

[0135] S302, the terminal device receives first configuration information.

[0136] Based on the above description, the terminal device receives the first configuration information described above. Based on the indication of the first configuration information, the time starting point of the target time resource can be determined. Then, the duration period or the deadline point of the target time resource is determined through protocol agreement or indication of the network device. Further, the random access resource that can be used by the terminal device is determined. For details, refer to the description above, which is not described here.

[0137] S303, the terminal device sends a random access signal to the network device in a time resource starting at the starting point indicated by the first configuration information.

[0138] After the terminal device determines the available random access resource, the terminal device can send a random access signal to the network device for implementing random access.

[0139] S304, the network device receives the random access signal of the terminal device in the time resource starting at the starting point.

[0140] The network device can receive a random access signal of the terminal device in the random access resource that the terminal device can use. Then, the network device can complete the access of the terminal device in response to the random access signal.

[0141] In a possible implementation, although the random access resource of the terminal device is configured in the above implementation, the network device can also trigger a contention-free random access of the terminal device through a PDCCH. In order to enable the terminal device to quickly respond to the contention-free random access, in addition to the random access resource configured for the terminal device, the network device can also reserve some other access resources for the terminal device. So that the terminal device can quickly perform the contention-free random access.

[0142] For example, the network device can configure a double-period random access resource. In one period, the random access resource effective in a specific time period is used for the terminal device to implement contention-based random access. The specific configuration can refer to the corresponding description of the foregoing embodiments, which will not be described here. In another period, the contention-free random access resource for the terminal device can be configured. For example, it can be directly implemented by a larger random access resource configuration. An expansion factor, for example, an expansion time window, can also be added to the existing maximum random access period. Then, the contention-free random access resource of the terminal device is configured in the expansion time window. For example, the current integrated access and backhaul (IAB) communication mode supports the configuration of an expansion factor to expand the existing random access resource period. The embodiments of the present application will not be described here.

[0143] The above implementation still has corresponding access resources for the contention-free access when the terminal device needs to initiate the contention-free random access due to some reasons. The access efficiency and user experience are improved.

[0144] In summary, in the scenario of satellite communication, the terminal device will initiate access only when the ephemeris is obtained in the received SIB19, and / or can access only after synchronization based on the received SSB. At other times, the terminal device will not initiate access even if there is a random access resource. Based on this, in the above scheme, the start point of the random access resource of the terminal device is determined based on the SIB19 and / or the SSB, so that the random access resource is concentrated in a reasonable time range, the reservation and occupation of unnecessary access resources are reduced, and the resource utilization efficiency is improved.

[0145] The communication apparatus provided by the embodiments of the present application will be described below.

[0146] The present application divides the functional modules of the communication device according to the above method embodiments. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, there can be another division manner. The communication device of the embodiments of the present application will be described below with reference to FIGS. 16-18.

[0147] FIG. 16 is a structural schematic diagram of a communication device according to an embodiment of the present application. As shown in FIG. 16, the communication device includes a processing module 1601 and a transceiver module 1602. The transceiver module 1602 can implement corresponding communication functions, and the processing module 1601 is configured to implement corresponding processing functions. The transceiver module 1602 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0148] In some embodiments of the present application, the communication device can be used to perform the actions performed by the network device in the above method embodiments. The communication device can be the network device itself or a chip or functional module configured in the network device, etc. The transceiver module 1602 is configured to perform the transceiving-related operations of the network device in the above method embodiments, and the processing module 1601 is configured to perform the processing-related operations of the network device in the above method embodiments.

[0149] For example, the transceiver module 1602 can be configured to send first configuration information to the terminal device. The first configuration information indicates a starting point of a time resource for random access of the terminal device; the starting point is determined based on a system information block SIB19 and / or a synchronization signal block SSB. The transceiver module 1602 can also be configured to receive a random access signal of the terminal device in the time resource starting from the starting point. For specific implementation, reference can be made to the related description of steps S301 and S304 shown in FIG. 3, which will not be described here.

[0150] Referring to FIG. 16, in some other embodiments of the present application, the communication device shown in FIG. 16 can be used to perform the actions performed by the terminal device in the above method embodiments. The communication device can be the terminal device itself or a chip or functional module configured in the terminal device, etc. The transceiver module 1602 is configured to perform the transceiving-related operations of the terminal device in the above method embodiments, and the processing module 1601 is configured to perform the processing-related operations of the terminal device in the above method embodiments.

[0151] For example, the transceiver module 1602 can be configured to receive first configuration information, where the first configuration information indicates a starting point of a time resource for random access of the terminal device, and the starting point is determined based on a system information block (SIB) 19 and / or a synchronization signal block (SSB). The transceiver module 1602 can also be configured to transmit a random access signal in the time resource starting from the starting point. For details, reference can be made to the descriptions of steps S302 and S303 in FIG. 3.

[0152] Optionally, in each of the above embodiments, the communication apparatus can further include a storage module, which can be configured to store instructions and / or data, and the processing module 1601 can read the instructions and / or data in the storage module, so that the communication apparatus implements the foregoing method embodiments.

[0153] The specific descriptions of the transceiver module and the processing module in each of the above embodiments are merely examples. For the specific functions or executed steps of the transceiver module and the processing module, reference can be made to the foregoing method embodiments, and details are not described herein.

[0154] The communication apparatus of the embodiments of the present application is introduced above, and possible product forms of the communication apparatus are introduced below. Any product form that has the functions of the communication apparatus described in FIG. 16 falls within the protection scope of the embodiments of the present application. The following introduction is merely an example, and does not limit the product form of the communication apparatus of the embodiments of the present application.

[0155] In a possible implementation, in the communication apparatus shown in FIG. 16, the processing module 1601 can be one or more processors, and the transceiver module 1602 can be a transceiver, or the transceiver module 1602 can also be a transmitting module and a receiving module, the transmitting module can be a transmitter, and the receiving module can be a receiver, and the transmitting module and the receiving module are integrated in one device, for example, a transceiver. In the embodiments of the present application, the processor and the transceiver can be coupled, and the connection manner of the processor and the transceiver is not limited in the embodiments of the present application. In the process of executing the foregoing method, the process of transmitting information in the foregoing method can be understood as the process of outputting the foregoing information by the processor. When the foregoing information is output, the processor outputs the foregoing information to the transceiver, so as to be transmitted by the transceiver. After the foregoing information is output by the processor, it can also need to be processed further, and then reaches the transceiver. Similarly, the process of receiving information in the foregoing method can be understood as the process of receiving inputted foregoing information by the processor. When the processor receives the inputted information, the transceiver receives the foregoing information and inputs it to the processor. Furthermore, after the transceiver receives the foregoing information, the foregoing information can need to be processed further, and then input to the processor.

[0156] As shown in FIG. 17, the communication apparatus 170 includes one or more transceiver 1710 and processor 1720.

[0157] For example, the transceiver 1710 is configured to perform the functions or steps implemented by the transceiver module 1602 shown in FIG. 16, and the processor 1720 is configured to perform the functions or steps implemented by the processing module 1601 shown in FIG. 16. For the specific description of the processor 1720 and the transceiver 1710, reference can be made to the method embodiments shown in FIG. 16 or described above, and will not be repeated here.

[0158] In the various implementations of the communication apparatus shown in FIG. 17, the transceiver can include a receiver configured to perform the functions (or operations) of receiving and a transmitter configured to perform the functions (or operations) of transmitting. The transceiver is configured to communicate with other devices / apparatuses via a transmission medium.

[0159] Optionally, the communication apparatus 170 can further include one or more memories 1730 configured to store program instructions and / or data. The memory 1730 is coupled to the processor 1720. The coupling between the apparatuses, units or modules in the embodiments of the present application is indirect coupling or communication connection between the apparatuses, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between the apparatuses, units or modules. The processor 1720 can operate in cooperation with the memory 1730. The processor 1720 can execute the program instructions stored in the memory 1730. Optionally, at least one of the one or more memories can be included in the processor.

[0160] The specific connection medium between the transceiver 1710, the processor 1720 and the memory 1730 is not limited in the embodiments of the present application. In FIG. 17, the memory 1730, the processor 1720 and the transceiver 1710 are connected through a bus 1740, which is represented by a thick line in FIG. 17, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used in FIG. 17, but it does not mean that there is only one bus or only one type of bus.

[0161] In the embodiments of the present application, the processor can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor, etc.

[0162] In the embodiments of the present application, the memory can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM), a compact disc read-only memory (CD-ROM), and the like. The memory can be any storage medium capable of carrying or storing a program code in the form of instructions or data structures and capable of being read and / or written by a computer (such as the communication device shown in the present application and the like). The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, for storing program instructions and / or data.

[0163] Exemplarily, the processor 1720 is mainly used for processing communication protocols and communication data, controlling the whole communication device, executing software programs, and processing data of the software programs. The memory 1730 is mainly used for storing software programs and data. The transceiver 1710 can include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, and the like, are mainly used for receiving user input data and outputting data to users.

[0164] When the communication device is powered on, the processor 1720 can read the software program in the memory 1730, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1720 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1720. The processor 1720 converts the baseband signal into data and processes the data.

[0165] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0166] It can be understood that the communication apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 17, and the embodiments of the present application do not limit this. The method performed by the processor and the transceiver shown above is only an example, and the specific steps performed by the processor and the transceiver can refer to the method described above.

[0167] In another possible implementation, in the communication apparatus shown in FIG. 16, the processing module 1601 can be one or more logic circuits, and the transceiving module 1602 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiving module 1602 can also be a sending module and a receiving module, the sending module can be an output interface, and the receiving module can be an input interface, and the sending module and the receiving module are integrated in one module, for example, an input / output interface. As shown in FIG. 18, the communication apparatus shown in FIG. 18 includes a logic circuit 1801 and an interface 1802. That is, the processing module 1601 described above can be implemented by the logic circuit 1801, and the transceiving module 1602 can be implemented by the interface 1802. Among them, the logic circuit 1801 can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 1802 can be a communication interface, an input / output interface, a pin, etc. For example, FIG. 18 is a chip that takes the above communication apparatus as an example, which includes a logic circuit 1801 and an interface 1802.

[0168] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The specific connection mode of the logic circuit and the interface is not limited in the embodiments of the present application. For example, the logic circuit 1801 can be used to execute the functions or steps implemented by the processing module 1601 shown in FIG. 16, and the interface 1802 can be used to execute the functions or steps implemented by the transceiving module 1602 shown in FIG. 16. For specific description of the logic circuit 1801 and the interface 1802, refer to the method embodiments shown in FIG. 16 or the above, which will not be described in detail here.

[0169] For example, the chip shown in FIG. 18 can also include a memory.

[0170] It can be understood that the communication apparatus shown in the embodiments of the present application can implement the method provided by the embodiments of the present application in the form of hardware, or implement the method provided by the embodiments of the present application in the form of software, etc., and the embodiments of the present application do not limit this.

[0171] For the specific implementation of each embodiment shown in FIG. 18, refer to the above-mentioned embodiments, which will not be described in detail here.

[0172] The embodiments of the present application further provide a wireless communication system, which comprises a network device and a terminal device, and the network device and the terminal device can be used to execute the method in any of the foregoing embodiments.

[0173] In addition, the present application further provides a computer program for implementing the operations and / or processes performed by the network device in the method provided by the present application.

[0174] The present application further provides a computer program for implementing the operations and / or processes performed by the terminal device in the method provided by the present application (such as receiving feedback information).

[0175] The present application further provides a computer readable storage medium, which stores computer codes, and when the computer codes are run on a computer, the computer is caused to execute the operations and / or processes performed by the network device in the method provided by the present application.

[0176] The present application further provides a computer readable storage medium, which stores computer codes, and when the computer codes are run on a computer, the computer is caused to execute the operations and / or processes performed by the terminal device in the method provided by the present application.

[0177] The present application further provides a computer program product, which comprises computer codes or computer programs, and when the computer codes or computer programs are run on a computer, the operations and / or processes performed by the network device in the method provided by the present application are executed.

[0178] The present application further provides a computer program product, which comprises computer codes or computer programs, and when the computer codes or computer programs are run on a computer, the operations and / or processes performed by the terminal device in the method provided by the present application are executed.

[0179] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other means. For example, the device embodiments described above are only illustrative, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or modules, and can also be electrical, mechanical or other form of connection.

[0180] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the technical effects of the scheme provided by the embodiments of the present application.

[0181] In addition, the functional modules in the various embodiments of the present application can be integrated into one processing module, or each module can exist physically alone, or two or more modules can be integrated into one module. The integrated module can be realized in the form of hardware or in the form of a software functional module.

[0182] The integrated module, if realized in the form of a software functional module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0183] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: The network device sends first configuration information to the terminal device; the first configuration information indicates a starting point of time resources for random access of the terminal device; the starting point is determined based on a system information block (SIB) 19 and / or a synchronization signal block (SSB); The network device receives a random access signal of the terminal device in the time resources starting from the starting point.

2. The method of claim 1, wherein: The starting point is a time point after a first reference point by a first time length; the first reference point is an ending time point of a system information window of the SIB 19; or The starting point is a time point after a second reference point by a second time length; the second reference point is a starting time point of a system information window of the SIB 19; or The starting point is a time point after a third reference point by a third time length; the third reference point is a time domain starting time point of a first SIB 19 transmitted in the system information window of the SIB 19.

3. The method of claim 2, wherein, The first time length is a cell-level uplink data scheduling delay.

4. The method of claim 1, wherein: The starting point is a time point after a fourth reference point by a fourth time length; the fourth reference point is a starting time point of a search space of a physical downlink control channel (PDCCH) scheduling the SIB 19; or The starting point is a time point after a fifth reference point by a fifth time length; the fifth reference point is an ending time point of a search space of a PDCCH scheduling the SIB 19; or The starting point is a time point after a sixth reference point by a sixth time length; the sixth reference point is a starting time point of a time domain resource of a PDCCH scheduling the SIB 19; or The starting point is a time point after a seventh reference point by a seventh time length; the seventh reference point is an ending time point of a time domain resource of a PDCCH scheduling the SIB 19; or The starting point is a time point after an eighth reference point by an eighth time length; the eighth reference point is a starting time point of a time domain resource of the SSB; or The starting point is a time point after a ninth reference point by a ninth time length; the ninth reference point is an ending time point of a time domain resource of the SSB.

5. The method according to any one of claims 1 to 4, characterized in that, An ending time point of the time resources for random access of the terminal device is a time point after the SSB is received from the terminal device by a tenth time length.

6. The method according to any one of claims 1 to 5, characterized in that, An ending time point of the time resources for random access of the terminal device is a time point after the SIB 19 is received from the terminal device by an eleventh time length.

7. The method of any one of claims 1-6, wherein: The starting point is a time domain time point in a periodic random access resource configured by the network device, and the time resources for random access of the terminal device are a first time window in time domain resources included in the periodic random access resource.

8. The method of claim 7, wherein, The time domain resource further includes a second time window, and the second time window is configured for non-contention random access.

9. The method according to any one of claims 1 to 8, characterized in that, The method further includes: The network device configures the terminal device with non-contention random access resource.

10. A communication method characterized by comprising: The method includes: The terminal device receives first configuration information; the first configuration information indicates a starting point of time resource for random access of the terminal device; and the starting point is determined based on a system information block (SIB) 19 and / or a synchronization signal block (SSB). The terminal device transmits a random access signal in the time resource starting from the starting point.

11. The method of claim 10, wherein The starting point is a time point after a first reference point by a first time length; the first reference point is an ending time point of a system information window of the SIB 19; or The starting point is a time point after a second reference point by a second time length; the second reference point is a starting time point of a system information window of the SIB 19; or The starting point is a time point after a third reference point by a third time length; the third reference point is a time domain starting time point of a first SIB 19 transmitted in the system information window of the SIB 19.

12. The method of claim 11, wherein, The first time length is a cell-level uplink data scheduling delay.

13. The method of claim 10, wherein, The starting point is a time point after a fourth reference point by a fourth time length; the fourth reference point is a starting time point of a search space of a physical downlink control channel (PDCCH) scheduling the SIB 19; or The starting point is a time point after a fifth reference point by a fifth time length; the fifth reference point is an ending time point of a search space of a physical downlink control channel (PDCCH) scheduling the SIB 19; or The starting point is a time point after a sixth reference point by a sixth time length; the sixth reference point is a starting time point of a time domain resource of a physical downlink control channel (PDCCH) scheduling the SIB 19; or The starting point is a time point after a seventh reference point by a seventh time length; the seventh reference point is an ending time point of a time domain resource of a physical downlink control channel (PDCCH) scheduling the SIB 19; or The starting point is a time point after an eighth reference point by an eighth time length; the eighth reference point is a starting time point of a time domain resource of the SSB; or The starting point is a time point after a ninth reference point by a ninth time length; the ninth reference point is an ending time point of a time domain resource of the SSB.

14. The method according to any one of claims 1 to 13, characterized in that, An ending time point of the time resource for random access of the terminal device is a time point after the SSB is received by the terminal device by a tenth time length.

15. The method according to any one of claims 10 to 14, characterized in that, An ending time point of the time resource for random access of the terminal device is a time point after the SIB 19 is received by the terminal device by an eleventh time length.

16. The method according to any one of claims 10-15, characterized in that, The starting point is a time domain time point in a periodic random access resource configured by the network device, and the time resource for random access of the terminal device is a first time window in the time domain resource included in the periodic random access resource.

17. The method of claim 16, wherein, The time domain resource further includes a second time window, and the second time window is configured for non-contention-based random access.

18. The method according to any one of claims 10-17, characterized in that, The method further includes: The terminal device receives the non-contention-based random access resource configured by the network device.

19. A communications device, characterized by The computer program product includes a computer program, and the computer program is executed to perform the method in any one of claims 1-9; or 20. A communications device, characterized by The computer program product includes a computer program, and the computer program is executed to perform the method in any one of claims 10-18.

21. A communications device, characterized by The communication system includes a network device and a terminal device, the network device is used to perform the method in any one of claims 1-9, and the terminal device is used to perform the method in any one of claims 10-18.

22. A computer-readable storage medium, characterized in that, The communication system includes a network device and a terminal device, the network device is used to perform the method in any one of claims 1-9, and the terminal device is used to perform the method in any one of claims 10-18.

23. A computer program product, characterised in that, ​ ​ 24. A communication system, characterized by ​

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