A communication method, a communication device, a storage medium, and a communication system

Abstract

The application provides a communication method, a communication device, a storage medium and a communication system. The method can be applied to a random access resource scene. In the method, a network device can switch between a first cell and a second cell. The first cell is used to send SIB1 based on a request of a terminal device, and the second cell is used to periodically broadcast SIB1. In a case where the network device switches from the first cell to the second cell, the network device determines target random access resources corresponding to the second cell from at least one of preconfigured random access resources corresponding to the first cell and preconfigured random access resources corresponding to the second cell. The network device sends SIB1 to a terminal device in the second cell. The SIB1 is used to indicate the target random access resources, so that the random access resources can be flexibly configured for the second cell, and the resource utilization rate is improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to a communication method, communication device, storage medium, and communication system. Background Technology

[0002] In the 5G New Radio (NR) system, the first System Information Block 1 (SIB1) carries information related to whether the UE is allowed to access the cell.

[0003] Based on the green and energy-saving requirements of 5G networks, network equipment can adopt Network Energy Saving (NES) cells. How network equipment can improve resource utilization by indicating random access resources based on NES cells has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] This application provides a communication method, communication device, storage medium, and communication system that enable network devices to instruct random access resources corresponding to the cell broadcasting SIB1, thereby improving resource utilization.

[0005] Firstly, a communication method is provided, which can be executed by a network device, or by a component (such as a circuit, chip, or chip system) configured in the network device, or by a logic module or software capable of implementing all or part of the functions of the network device. This application does not limit this approach. The following description uses a network device (such as a satellite) as an example.

[0006] The method includes: when the network device switches from a first cell to a second cell, determining a target random access resource corresponding to the second cell, wherein the target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell; the first cell is used to instruct the sending of a first system information block (SIB1) based on a request from a terminal device, and the second cell is used to instruct the periodic broadcasting of the SIB1; sending the SIB1 to a terminal device located in the second cell, wherein the SIB1 is used to indicate the target random access resource.

[0007] In the above scheme, the network device can switch back and forth between a first cell and a second cell. The first cell is used to indicate the sending of SIB1 based on the request of the terminal device; for example, the first cell is a network energy-saving cell or an NES cell. The second cell is used to indicate the periodic broadcast of SIB1; for example, the second cell is a non-network energy-saving cell or a Cell A cell. When the network device switches from the first cell to the second cell, the network device determines the target random access resource corresponding to the second cell from at least one of the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell. The network device sends SIB1 to the terminal device in the second cell. SIB1 is used to indicate the target random access resource. Therefore, it is possible to flexibly configure random access resources for the second cell and improve resource utilization.

[0008] In one possible implementation of the first aspect of this application, the pre-configured random access resources corresponding to the first cell are used to request SIB1;

[0009] The pre-configured random access resources corresponding to the second cell are used to request other system information (OSI), and the request for OSI adopts a request method based on non-contention-based random access.

[0010] Determining the target random access resource corresponding to the second cell includes:

[0011] The target random access resource corresponding to the second cell is determined based on the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell.

[0012] In the above scheme, when the pre-configured random access resources corresponding to the second cell are used to request OSI, and the OSI request adopts a request method based on non-contention random access, the network device can determine the target random access resources corresponding to the second cell, thereby providing an implementation scheme for the target random access resources of the second cell when switching from the first cell to the second cell, improving the implementability of the embodiments of this application.

[0013] In one possible implementation of the first aspect of this application, the second cell is used to indicate m OSIs, where m is a positive integer, and the SIB1 is used to indicate N sets of random access resources, where N is a positive integer;

[0014] The step of determining the target random access resource corresponding to the second cell based on the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell includes:

[0015] When N equals 1, the pre-configured random access resource corresponding to the second cell is replaced with the pre-configured random access resource corresponding to the first cell to obtain the target random access resource, which includes the pre-configured random access resource corresponding to the first cell.

[0016] or,

[0017] When N is greater than 1 and N is less than m, the pre-configured random access resource corresponding to the first cell is added to the target random access resource, and the target random access resource includes: the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell;

[0018] or,

[0019] When N is greater than 1 and N is equal to m, any set of pre-configured random access resources corresponding to the second cell is replaced with the pre-configured random access resources corresponding to the first cell to obtain the target random access resources. The target random access resources include: the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell that have not been replaced.

[0020] In the above scheme, by replacing the pre-configured random access resources of the second cell with the pre-configured random access resources of the first cell, the pre-configured random access resources of the first cell can be reused, avoiding resource waste and improving resource utilization. When N is greater than 1 and N is less than m, each set of random access resources corresponds to a specific OSI broadcast on demand according to the request of the terminal device. Through resource expansion, in addition to using the pre-configured random access resources of the second cell, the pre-configured random access resources of the first cell can also be used, thus reusing the pre-configured random access resources of the first cell, avoiding resource waste and improving resource utilization. When N is greater than 1 and N equals m, each set of random access resources corresponds to a specific OSI broadcast on demand according to the request of the terminal device. By replacing any set of pre-configured random access resources of the second cell with the pre-configured random access resources of the first cell, the pre-configured random access resources of the first cell can be reused, avoiding resource waste and improving resource utilization.

[0021] In one possible implementation of the first aspect of this application, the pre-configured random access resources corresponding to the first cell are used to request SIB1;

[0022] The second cell is used to indicate the use of a contention-based random access request method to request other system information (OSI).

[0023] Determining the target random access resource corresponding to the second cell includes:

[0024] Configure the pre-configured random access resource corresponding to the first cell as the target random access resource, wherein the target random access resource includes: the pre-configured random access resource corresponding to the first cell.

[0025] In the above scheme, in the scenario based on contention-based random access, the network device no longer configures the pre-configured random access resources corresponding to the second cell. When the OSI request adopts the request method based on contention-based random access, the network device can determine the target random access resources corresponding to the second cell, thereby providing an implementation scheme for the target random access resources of the second cell when switching from the first cell to the second cell, improving the implementability of the embodiments of this application.

[0026] In one possible implementation of the first aspect of this application, determining the target random access resource corresponding to the second cell includes:

[0027] The target random access resource is determined as follows: the pre-configured random access resource corresponding to the second cell;

[0028] The pre-configured random access resources corresponding to the first cell are used to send the SIB1 based on the request of the terminal device when the network device switches back from the second cell to the first cell.

[0029] In the above scheme, the pre-configured random access resources corresponding to the first cell are used to send SIB1 based on the terminal device's request when the network device switches back from the second cell to the first cell. The network device then pre-configures random access resources for the second cell. This provides an implementation scheme for the target random access resources of the second cell when switching from the first cell to the second cell, improving the implementability of the embodiments of this application.

[0030] In one possible implementation of the first aspect of this application, the method further includes:

[0031] Receive the OSI request sent by the terminal device through the target random access resource;

[0032] The OSI is sent to the terminal device.

[0033] In one possible implementation of the first aspect of this application, the pre-configured random access resource corresponding to the first cell is determined by first configuration information, wherein the SIB1 includes a system information request resource field, the system information request resource field being used to indicate the target random access resource.

[0034] Secondly, a communication method is provided, which can be executed by a terminal device, or by a component (such as a circuit, chip, or chip system) configured in the terminal device, or by a logic module or software capable of implementing all or part of the functions of the terminal device. This application does not limit this. The following description uses a terminal device as an example.

[0035] The method includes: receiving a first system information block (SIB1) sent by a network device after switching from a first cell to a second cell, wherein the terminal device is located in the second cell, the SIB1 is used to indicate a target random access resource, the target random access resource including at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell; the first cell is used to indicate sending the SIB1 based on a request from the terminal device, and the second cell is used to indicate periodically broadcasting the SIB1.

[0036] In one possible implementation of the second aspect of this application, the method further includes:

[0037] Send other system information OSI requests to the network device through the target random access resource;

[0038] Receive the OSI from the network device.

[0039] The second aspect is the implementation on the terminal device side, which corresponds to the first aspect. The explanations, supplements, and descriptions of the beneficial effects of the first aspect also apply to the second aspect, and will not be repeated here.

[0040] Thirdly, a communication method is provided, which can be executed by a terminal device, or by a component (such as a circuit, chip, or chip system) configured in the terminal device, or by a logic module or software capable of implementing all or part of the functions of the terminal device. This application does not limit this approach. The following description uses a terminal device as an example.

[0041] The method includes: receiving first configuration information from a network device, the first configuration information being used to indicate whether to provide time-frequency domain parameters for a terminal device to receive a first system information block (SIB1); and determining whether the first configuration information provides time-frequency domain parameters for a terminal device to receive the SIB1.

[0042] In the above scheme, the network device obtains the first configuration information, which is used to indicate whether to provide the time-frequency domain parameters for the terminal device to receive SIB1. The network device can flexibly determine whether the first configuration information indicates whether to provide the time-frequency domain parameters for the terminal device to receive SIB1, thereby reducing the content of the first configuration information, improving transmission efficiency, and reducing transmission energy consumption.

[0043] In one possible implementation of the third aspect of this application, the method further includes:

[0044] If the first configuration information does not provide time-frequency domain parameters for the terminal device to receive the SIB1, the MIB from the network device is received;

[0045] The time-frequency domain parameters of the SIB1 received by the terminal device are determined based on the MIB.

[0046] In the above scheme, the terminal device determines the time-frequency domain parameters of the SIB1 received by the terminal device based on the MIB. That is, the MIB can provide the time-frequency domain parameters of the SIB1 received by the terminal device, and the terminal device can obtain the time-frequency domain parameters of the SIB1 received.

[0047] In one possible implementation of the third aspect of this application, the method further includes:

[0048] Receive MIB from the network device;

[0049] If the first configuration information does not provide time-frequency domain parameters for the terminal device to receive the SIB1, and the MIB does not provide time-frequency domain parameters for the terminal device to receive the SIB1, a first system information block OD-SIB1 request is sent to the network device.

[0050] In the above scheme, the terminal device cannot provide the time-frequency domain parameters for receiving SIB1 through the first configuration information and MIB. The terminal device can also send an OD-SIB1 request to obtain the time-frequency domain parameters for receiving SIB1.

[0051] In one possible implementation of the third aspect of this application, the method further includes:

[0052] If the first configuration information provides the terminal device with the time-frequency domain parameters for receiving the SIB1, it is determined whether to receive the MIB from the network device.

[0053] In the above scheme, the terminal device can flexibly determine the time-frequency domain parameters of receiving SIB1, for example, through the first configuration information or through the MIB of the network device, without limitation here. The embodiments of this application can enable the terminal device to flexibly determine the time-frequency domain parameters of receiving SIB1.

[0054] Fourthly, a communication method is provided, which can be executed by a network device, or by a component (such as a circuit, chip, or chip system) configured in the network device, or by a logic module or software capable of implementing all or part of the functions of the network device. This application does not limit this. The following description uses a network device (such as a satellite) as an example.

[0055] The method includes: obtaining first configuration information, the first configuration information being used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1; and sending the first configuration information to the terminal device.

[0056] In one possible implementation of the fourth aspect of this application, the first configuration information includes: a first field;

[0057] The first field is a first value, used to indicate the time-frequency domain parameters for receiving the SIB1 by the terminal device;

[0058] or,

[0059] The first field is the second value, used to indicate that the time-frequency domain parameters for receiving the SIB1 are not provided by the terminal device.

[0060] In the above scheme, the first field in the first configuration information can flexibly indicate whether to provide time-frequency domain parameters for the terminal device to receive SIB1.

[0061] The fourth aspect is the implementation on the network device side, which corresponds to the third aspect. The explanations, supplements, and descriptions of the beneficial effects of the third aspect also apply to the fourth aspect, and will not be repeated here.

[0062] Fifthly, a communication device is provided, which includes a processing module and a transceiver module.

[0063] The processing module is used to determine the target random access resource corresponding to the second cell when the network device switches from the first cell to the second cell. The target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell and a pre-configured random access resource corresponding to the second cell. The first cell is used to instruct the sending of a first system information block (SIB1) based on a request from the terminal device, and the second cell is used to instruct the periodic broadcasting of the SIB1.

[0064] The transceiver module is used to send the SIB1 to the terminal device located in the second cell, and the SIB1 is used to indicate the target random access resource.

[0065] Sixthly, a communication device is provided, which includes a transceiver module.

[0066] The transceiver module is used to receive a first system information block (SIB1) sent by a network device after it switches from a first cell to a second cell. The terminal device is located in the second cell. The SIB1 is used to indicate a target random access resource. The target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell. The first cell is used to indicate that the SIB1 is sent based on a request from the terminal device, and the second cell is used to indicate that the SIB1 is broadcast periodically.

[0067] This processing module is used to determine the target random access resource indicated by SIB1.

[0068] The fifth and sixth aspects are the implementations on the device side corresponding to the first and second aspects. The explanations, supplements, and descriptions of the beneficial effects of the first and second aspects also apply to the fifth and sixth aspects, and will not be repeated here.

[0069] In a seventh aspect, a communication device is provided, which includes a processing module and a transceiver module.

[0070] The transceiver module is used to receive first configuration information from the network device, the first configuration information being used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1;

[0071] This processing module is used to determine whether the first configuration information provides time-frequency domain parameters for the terminal device to receive the SIB1.

[0072] Eighthly, a communication device is provided, which includes a transceiver module.

[0073] The processing module is used to obtain first configuration information, which is used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1.

[0074] The transceiver module is used to send the first configuration information to the terminal device.

[0075] The seventh and eighth aspects are the implementations on the device side corresponding to the third and fourth aspects. The explanations, supplements, and descriptions of the beneficial effects of the third and fourth aspects also apply to the seventh and eighth aspects, and will not be repeated here.

[0076] A ninth aspect provides a communication device including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the methods in any possible implementation of any of the preceding aspects. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0077] In one implementation, the communication interface may be a transceiver, or an input / output interface.

[0078] In another implementation, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface can be an input / output interface.

[0079] In a tenth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to execute a method in any possible implementation of any aspect.

[0080] In specific implementation, the processor can be one or more chips, the input circuit can be input pins, the output circuit can be output pins, and the processing circuit can be transistors, gate circuits, flip-flops, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to and transmitted by a transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as both the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0081] Eleventhly, a communication device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, receive signals via a receiver, and transmit signals via a transmitter to execute the method in any possible implementation of any of the preceding aspects.

[0082] Optionally, the processor may be one or more, and the memory may be one or more.

[0083] In a twelfth aspect, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code or instructions) that, when the computer program is run, causes a computer to perform a method in any possible implementation of any of the above aspects.

[0084] In a thirteenth aspect, a computer-readable storage medium is provided that stores a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the methods in any possible implementation of any of the preceding aspects.

[0085] In a fourteenth aspect, embodiments of this application provide a chip system including one or more processors for calling and executing instructions stored in memory, causing the methods in any of the above aspects or possible implementations to be performed. The chip system may be composed of chips or may include chips and other discrete devices.

[0086] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data.

[0087] In a fifteenth aspect, a communication system is provided, including the aforementioned terminal device and network device. Optionally, the communication system may further include other devices that communicate with the terminal device and / or network device. Attached Figure Description

[0088] Figure 1 This is a schematic diagram of the composition structure of a communication system provided in an embodiment of this application;

[0089] Figure 2 A schematic diagram illustrating the application and transmission process for OD-SIB1 provided for embodiments of this application;

[0090] Figure 3 A schematic diagram of a CFRA process provided for an embodiment of this application;

[0091] Figure 4 A schematic diagram of a CBRA process provided in an embodiment of this application;

[0092] Figure 5 This is a schematic diagram illustrating the interaction between a network device and a terminal device, provided as an embodiment of this application.

[0093] Figure 6 This is a schematic diagram illustrating another interaction between a network device and a terminal device, provided as an embodiment of this application.

[0094] Figure 7 This is a schematic diagram of the composition structure of a communication device provided in an embodiment of this application;

[0095] Figure 8 This is a schematic diagram of the composition structure of another communication device provided in an embodiment of this application. Detailed Implementation

[0096] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0097] The technical solutions provided in this application can be applied to various communication systems, such as: Global System for Mobile Communications (GSM) system, General Packet Radio Service (GPRS), Wireless Local Area Network (WLAN), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, sidelink communication system, Universal Mobile Telecommunication System (UMTS), and Global System for Mobile Communications (GSM) microwave access.

[0098] Worldwide interoperability for microwave access (WiMAX) communication systems, non-terrestrial network (NTN) communication systems, 5th generation (5G) mobile communication systems, or new radio access technology (NR). Among these, 5G mobile communication systems can include non-standalone (NSA) and / or standalone (SA) networking. The technical solutions provided in this application can also be applied to future communication systems. This application does not limit the scope of the application.

[0099] Figure 1 This is a schematic diagram of a communication system 100 used in an embodiment of this application. The communication system 100 may include network devices, such as... Figure 1 The network device 110 is shown. The communication system 100 may also include terminal devices, such as... Figure 1 The terminal device 120 is shown. The network device 110 and the terminal device 120 can communicate via a wireless link.

[0100] Figure 1 An exemplary network device 110 and a terminal device 120 are shown. Optionally, the communication system 100 may also include multiple network devices and / or multiple terminal devices.

[0101] The network equipment in this application can be network-side equipment such as access network equipment and core network equipment. Access network equipment is sometimes also called access node. Access network equipment has wireless transceiver capabilities and is used to communicate with terminals. Access network equipment includes, but is not limited to, base stations, evolved NodeBs (eNodeBs), transmission reception points (TRPs) in the above-mentioned communication systems, next-generation NodeBs (gNBs) in 5G mobile communication systems, access network equipment or modules of access network equipment in open RAN (ORAN) systems, satellites in NTN communication systems, base stations in future mobile communication systems, or access nodes in WiFi systems. Access network equipment can also be modules or units that can implement some of the functions of a base station. Access network equipment can be macro base stations, micro base stations, or indoor stations, relay nodes or donor nodes, or wireless controllers in cloud radioaccess network (CRAN) scenarios. Optionally, access network equipment can also be servers, wearable devices, or vehicle-mounted equipment, etc. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). Multiple access network devices in a communication system can be base stations of the same type or different types. Base stations can communicate with terminals directly or via relay stations. Terminals can communicate with multiple base stations using different access technologies. The embodiments of this application do not limit the specific technology or device form used in the access network equipment. In this application, the access network equipment is referred to as a network device.

[0102] In this application, the means for implementing the functions of a network device can be a network device itself, or a means capable of supporting the network device in implementing those functions, such as a processor, circuit, chip, or chip system. This means can be installed in or connected to the network device. In the technical solutions provided in this application, the example of a network device being used to implement the functions of a network device is used to describe the technical solutions provided in this application.

[0103] The terminal device in this application can be a wireless terminal device capable of receiving network device scheduling and instruction information. The wireless terminal device can be a device providing voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. For example, the terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), ultra-reliable low-latency communication (URLLC), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, or satellite communication, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, aircraft (such as drone, helicopter, airplane), hot air balloon, ship, robot, robotic arm, or smart home device, etc. The embodiments of this application do not limit the form of the terminal device.

[0104] In this application, the apparatus for implementing the functions of a terminal device can be the terminal device itself, or any apparatus capable of supporting the terminal device in implementing those functions, such as a processor, circuit, chip, or chip system. This apparatus can be installed in or connected to the terminal device. In the technical solutions provided in this application, the example of a terminal device being used to implement the functions of a terminal device is used to describe the technical solutions provided in this application.

[0105] Access network devices and / or terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. This application does not limit the application scenarios of the access network devices and terminals. Access network devices and terminal devices can be deployed in the same or different scenarios; for example, both can be deployed on land; or the access network device can be deployed on land, and the terminal device on water, etc., and so on.

[0106] In practical applications, multiple network devices can collaborate to assist terminals in achieving wireless access, with different network devices each implementing a portion of the base station's functions. For example, network devices can be central units (CUs), distributed units (DUs), CU-control plane (CPs), CU-user plane (UPs), or radio units (RUs), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0107] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (Open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. CU (or CU-CP and CU-UP), DU, and RU can implement different protocol layer functions.

[0108] To facilitate understanding of the embodiments of this application, the terminology used in this application will be briefly explained first. Optionally, the explanation of some terms may also refer to the explanations in the 3rd Generation Partnership Project (3GPP) standard protocol.

[0109] 1. System Information Block 1 (SIB1)

[0110] In 5G NR systems, SIB1 carries information related to whether a UE is allowed to access the cell and defines the scheduling of other system information. In addition, SIB1 provides radio resource configuration information shared by all UEs and prohibition information required for unified access control. Currently, the protocol specifies that SIB1 is transmitted on the Downlink Shared Channel (DL-SCH) with a period of 160 milliseconds (ms), and is repeated within 160ms. The default repetition period is 20ms, but this depends on the specific network implementation. For multiplexing mode 1 of the Synchronization Signal and PBCH block (SSB) and Control Resource Set (CORESET), the SIB1 repetition period is 20ms. For multiplexing modes 2 and 3 of SSB and CORESET, the SIB1 repetition period is the same as the SSB period.

[0111] 2. On Demand First System Information Block (OD-SIB1)

[0112] Based on the need for green and energy-efficient 5G networks, a scheme for non-continuous periodic transmission of SIB1 is being discussed in the Network Energy Saving (NES) project. This scheme allows SIB1 to be transmitted after receiving a request from the UE. This scheme can also be called OD-SIB1.

[0113] 3. NES cell and Cell A

[0114] Cells that send SIB1 messages based on UE requests are called NES cells, while cells that are aware of OD-SIB1 features but still broadcast SIB1 messages are called Cell A. UEs that support sending OD-SIB1 requests are called NES UEs; by default, non-R19 UEs (legacy UEs) do not support the OD-SIB1 feature. The OD-SIB1 scheme achieves network energy saving by reducing the frequency of SIB1 transmissions on the network side.

[0115] It should be understood that the technical terms used in this application are for illustrative purposes only and not as limiting. For example, as technology evolves, technical terms may also change, and other technical terms that have the same technical meaning should also apply to this application.

[0116] like Figure 2 The diagram shown is a schematic representation of the application and transmission process for OD-SIB1 provided in this embodiment of the application. It involves the interaction between the NES UE, Cell A gNB, and NES Cell gNB, and mainly includes the following steps:

[0117] S01.Cell A gNB sends WUS configuration information.

[0118] The neighboring cell Cell A of the NES cell sends a wake-up signal (WUS) configuration information to the NESUE. The WUS configuration information carries the request configuration information for the NES cell to support OD-SIB1. The request configuration information for the NES cell to support OD-SIB1 includes the resource information used to send the WUS signal. Specifically, the resource information includes: random access preamble, random access channel (RACH) resources, etc.

[0119] S02.NES UE triggers WUS signal.

[0120] S03.NES UE sends WUS signal.

[0121] The NES UE sends a WUS signal to the NES cell using the resources allocated in the WUS configuration information. The WUS signal carries an OD-SIB1 request. The resources allocated in the WUS configuration information are reserved by the NES cell for the OD-SIB1 process. The NES cell synchronizes the resource information with Cell A, which then transmits the resource information to the NES UE.

[0122] S04.NES Cell gNB sends SIB1.

[0123] After receiving the WUS signal from the UE, the NES cell transmits the SIB1 message to the NES UE.

[0124] In the above process, a cell is either an NES cell or a Cell A cell. That is, if a cell is an NES cell, it will always maintain the characteristic of SIB1 on-demand request; if a cell is a Cell A cell, it will always periodically broadcast SIB1.

[0125] However, for the aforementioned handover scenario, there are still some implementation schemes. In the NES scenario, a cell may be an NES cell or Cell A, and network devices may actively or passively switch to an NES cell or Cell A. Based on the existing definitions of these two types of cells, it can be seen that only in NES cells does the UE need to send a WUS signal to request a SIB1 message, and the prerequisite for sending a WUS signal is that the UE needs to have the WUS configuration information of the corresponding NES cell to determine the random access preamble and RACH resources used to send the WUS signal. When an NES cell switches to Cell A, the UE does not need to send a WUS signal to request a SIB1 message; it can directly receive the SIB1 message periodically broadcast within the cell. At this time, the resources originally reserved for sending WUS signals in the OD-SIB1 process are not used by the UE. Therefore, this application embodiment needs to solve how the UE can utilize the reserved resources in the WUS configuration information to improve network resource utilization when an NES cell switches to Cell A. The above utilization can include reuse or continuation.

[0126] The following describes the classification of system information content in the embodiments of this application. System information (SI) includes a master information block (MIB) and several system information blocks (SIBs). System information can be further divided into minimum system information (MSI) and other system information (OSI).

[0127] Specifically, MSI includes the basic information required for initial access and the information for obtaining OSI.

[0128] The MIB contains multiple physical layer information required for the current cell to obtain SIB1 messages, and the MIB is sent through periodic broadcasts.

[0129] SIB1 defines the OSI scheduling mechanism. SIB1 is also known as Remaining Minimum System Information (RMSI). SIB1 is sent through periodic broadcasts.

[0130] The OSI includes all SIBs that are not broadcast in the MSI. These SIBs can be broadcast periodically or on demand upon request from the UE.

[0131] Periodic broadcasting refers to the network device continuously sending the SI within a pre-configured SI time window. UE-request-based allocation broadcasting means that the network device does not send the SI unless a UE requests it; only if a UE sends a request to the network device will the network device broadcast the SI for a period of time within the pre-configured SI time window.

[0132] Next, we will explain the process of obtaining system information. First, we will explain the system information request mechanism. Only other system information is allowed to be broadcast on demand according to the UE request. This feature is called On-Demand OSI (OD-OSI).

[0133] For OD-OSI, the protocol defines two optional modes, both of which are implemented by triggering a random access procedure. One is OD-OSI based on contention-free random access (CFRA); the other is OD-OSI based on contention-based random access (CBRA).

[0134] like Figure 3 As shown, the OD-OSI that triggers the CFRA process will be explained first. The CFRA process can also be called the MSG 1 process, which mainly includes the following steps:

[0135] 1. Configure the system re-request configuration (si-RequestConfig) parameters of the OSI scheduling information in the SIB1 message for network devices, and pre-allocate random access resources such as preamble and PRACH resources to OD-OSI.

[0136] 2. The UE reads the SIB1 message to obtain resource information. In the message 1 (Msg1) stage of the random access procedure (i.e., preamble transmission), it selects a specific preamble and Physical Random Access Channel (PRACH) resource, implicitly indicating the system information that needs to be requested.

[0137] 3. The network device acknowledges receipt of the UE's OD-OSI request in message 2 (Msg2) (i.e., Random Access Response (RAR)).

[0138] 4. System information for network devices to send UE requests.

[0139] like Figure 4As shown, the OD-OSI that triggers the CBRA process will be explained next. The CBRA process can also be called the MSG 3 process, which mainly includes the following steps:

[0140] 1. Network devices do not configure the si-RequestConfig parameter of OSI scheduling information in SIB1 messages, and do not allocate random access resources such as preamble and PRACH resources to OD-OSI.

[0141] 2. During the Msg1 (preamble transmission) phase, the UE randomly selects a preamble to initiate random access.

[0142] 3. The network device provides message 3 (Msg3) in Msg2 (Random Access Response, RAR), which is used to transmit scheduling information.

[0143] 4. The UE sends Msg3 according to the scheduling information. In the Msg3 (Radio Resource Control (RRC) Connection Establishment Request) stage, the UE explicitly requests the required system information through RRC signaling, namely the RRCSystemInfoRequest message.

[0144] 5. The network device completes the contention resolution in message 4 (Msg4) (i.e., contention resolution message) and confirms receipt of the UE's OD-OSI request.

[0145] 6. System information for network devices to send UE requests.

[0146] In the above Figure 4 During the process, the UE randomly selects a preamble to initiate random access. There may be multiple UEs competing for access by selecting the same preamble. In this case, the network device will prioritize the reasons for initiating random access and only respond to one of the UEs.

[0147] Based on the above Figure 3 and Figure 4 In the process, since the UE sends system information requests at different stages of the random access procedure, the OD-OSI that triggers CFRA is also called Msg1 based OD-OSI, and the OD-OSI that triggers CBRA is also called Msg3 based OD-OSI.

[0148] In view of this, this application provides a communication method in which a network device can switch back and forth between a first cell and a second cell. The first cell is used to indicate the transmission of SIB1 based on a request from a terminal device; for example, the first cell is a network energy-saving cell or an NES cell. The second cell is used to indicate the periodic broadcast of SIB1; for example, the second cell is a non-network energy-saving cell or a Cell A cell. When the network device switches from the first cell to the second cell, the network device determines the target random access resource corresponding to the second cell from at least one of the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell. The network device then sends SIB1 to the terminal device located in the second cell. SIB1 indicates the target random access resource, thus enabling flexible configuration of random access resources for the second cell and improving resource utilization.

[0149] The solution provided in this application will be described in detail below with reference to the corresponding flowcharts. It is understood that the illustrative flowcharts provided in this application primarily use different devices (e.g., terminal devices, network devices) as examples of the execution subjects of this interactive illustration to illustrate the method, but this application does not limit the execution subjects of the interactive illustrations. For example, the devices (e.g., terminal devices, network devices) in the illustrative flowcharts can also be chips, chip systems, or processors that support the implementation of this method on the device, or logic modules or software that can implement all or part of the functions of the device.

[0150] As a general statement, the message or signaling interactions involved in the interaction process of this application embodiment can be standard messages or signaling or newly introduced messages or signaling. This application embodiment does not make specific limitations on this.

[0151] Figure 5 This is a schematic diagram illustrating a communication method according to an embodiment of this application. It can be understood that... Figure 5 The terminal device in the middle can be Figure 1 Any terminal device in the context of network equipment can refer to any component within a terminal device (such as a processor, chip, or chip system). Network equipment can be... Figure 1 Any access network device, or a component within an access network device (such as a processor, chip, or chip system). Figure 5 As shown, the method 500 includes the following steps:

[0152] 501. When a network device switches from a first cell to a second cell, the network device determines the target random access resource corresponding to the second cell, wherein the target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell; the first cell is used to indicate sending a first system information block SIB1 based on a request from a terminal device, and the second cell is used to indicate periodic broadcasting of SIB1.

[0153] In this embodiment of the application, the network device can switch between the first cell and the second cell. The network device switching cells can also be understood as a cell change, that is, the network device switches from the first cell to the second cell, or the network device changes from the first cell to the second cell.

[0154] When a network device switches from a first cell to a second cell, it needs to determine the target random access resource (RANK) for the second cell. There are several ways for the network device to determine the RANK for the second cell. For example, as described above, the network device can pre-configure RANK resources for both the first and second cells. Therefore, the network device can determine the RANK for the second cell based on the pre-configured RANK resources for the first and second cells. The RANK includes at least one of the following: pre-configured RANK resources for the first cell and pre-configured RANK resources for the second cell. The implementation method of the RANK can be determined based on the specific application scenario in this embodiment.

[0155] 502. The network device sends SIB1 to the terminal device located in the second cell. SIB1 is used to indicate the target random access resource. Correspondingly, 503. The terminal device receives SIB1 sent by the network device after switching from the first cell to the second cell. The terminal device is located in the second cell. SIB1 is used to indicate the target random access resource. The target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell; the first cell is used to indicate sending SIB1 based on the terminal device's request, and the second cell is used to indicate periodically broadcasting SIB1.

[0156] After the network device determines the target random access resource corresponding to the second cell, it can indicate the target random access resource to the terminal device via SIB1. The terminal device is within the coverage area of ​​the second cell. After the network device switches from the first cell to the second cell, it receives the SIB1 sent by the network device. Through this SIB1, the terminal device can determine the target random access resource, thus enabling it to use the target random access resource corresponding to the second cell and improving resource utilization.

[0157] In some embodiments of this application, the pre-configured random access resources corresponding to the first cell are used to request SIB1;

[0158] The pre-configured random access resources corresponding to the second cell are used to request other system information OSIs. The OSI request adopts a request method based on non-contention random access.

[0159] Step 501: The network device determines the target random access resource corresponding to the second cell, including:

[0160] A1. The network device determines the target random access resource corresponding to the second cell based on the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell.

[0161] The pre-configured random access resources corresponding to the first cell are those pre-configured by the network device for the first cell, and these resources are used to request SIB1. The pre-configured random access resources corresponding to the second cell are those pre-configured by the network device for the second cell, and these resources are used to request OSI. OSI requests use a non-contention-based random access request method; please refer to the previous section. Figure 3 The diagram illustrates the request method for non-contention-based random access. The network device can determine the target random access resource for the second cell based on the pre-configured random access resources corresponding to the first cell and the second cell. For example, the network device can determine the pre-configured random access resource corresponding to the first cell as the target random access resource for the second cell; or, the network device can determine the pre-configured random access resource corresponding to the second cell as the target random access resource without changing the pre-configured random access resource corresponding to the first cell; or, both the pre-configured random access resources corresponding to the first cell and the second cell can be determined as the target random access resource for the second cell. When the pre-configured random access resource corresponding to the second cell is used to request OSI, and the OSI request adopts a non-contention-based random access request method, the network device can determine the target random access resource for the second cell. This provides an implementation scheme for the target random access resource of the second cell in the case of handover from the first cell to the second cell, improving the implementability of the embodiments of this application.

[0162] Furthermore, in some embodiments of this application, the second cell is used to indicate m OSIs, where m is a positive integer, and SIB1 is used to indicate N sets of random access resources, where N is a positive integer;

[0163] Step A1. The network device determines the target random access resource corresponding to the second cell based on the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell, including:

[0164] A11. When N equals 1, the network device replaces the pre-configured random access resource corresponding to the second cell with the pre-configured random access resource corresponding to the first cell to obtain the target random access resource, which includes the pre-configured random access resource corresponding to the first cell.

[0165] or,

[0166] A12. When N is greater than 1 and N is less than m, the network device adds the pre-configured random access resources corresponding to the first cell to the target random access resources. The target random access resources include: the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell.

[0167] or,

[0168] A13. When N is greater than 1 and N equals m, the network device replaces any set of pre-configured random access resources corresponding to the second cell with the pre-configured random access resources corresponding to the first cell to obtain the target random access resources. The target random access resources include: the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell that have not been replaced.

[0169] Specifically, the network device first determines that the second cell is used to indicate m OSIs, where m is a positive integer and its value is not limited. The network device determines that there are a total of m OSIs to be broadcast on demand according to the terminal device's request. Additionally, the network device can also determine that SIB1 is used to indicate N sets of random access resources. That is, the network device indicates N sets of random access resources. For example, random access resources may include preamble and PRACH resources; one set of random access resources is one set of preamble and PRACH resources. Given the relationship between the values ​​of m and N, the network device can have multiple methods to determine the target random access resources.

[0170] For example, in the A11 scheme described above, N equals 1, so the network device only indicates one set of random access resources. In this case, the pre-configured random access resources corresponding to the first cell are replaced with the pre-configured random access resources corresponding to the second cell. This resource replacement yields the target random access resources, which include the pre-configured random access resources corresponding to the first cell. When N equals 1, the terminal device can request all m OSIs at once each time it sends an OD-OSI request. By replacing the pre-configured random access resources corresponding to the second cell with the pre-configured random access resources corresponding to the first cell, the pre-configured random access resources corresponding to the first cell can be reused, avoiding resource waste and improving resource utilization.

[0171] In the A12 scheme described above, when N is greater than 1 and less than m, the network device adds the pre-configured random access resources corresponding to the first cell to the target random access resources. The target random access resources can be obtained through resource expansion. The target random access resources include: the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell. When N is greater than 1 and less than m, each set of random access resources corresponds to a specific OSI broadcast on demand according to the request of the terminal device. Through resource expansion, in addition to using the pre-configured random access resources corresponding to the second cell, the pre-configured random access resources corresponding to the first cell can also be used. This can realize the reuse of the pre-configured random access resources corresponding to the first cell, avoid resource waste, and improve resource utilization.

[0172] In the A13 scheme described above, when N is greater than 1 and N equals m, the network device configures multiple sets of pre-configured random access resources corresponding to the second cell. The network device replaces any set of pre-configured random access resources corresponding to the second cell with the pre-configured random access resources corresponding to the first cell. Through resource replacement, the target random access resources can be obtained. The target random access resources include: the pre-configured random access resources corresponding to the first cell and the unreplaced pre-configured random access resources corresponding to the second cell. When N is greater than 1 and N equals m, each set of random access resources corresponds to a specific OSI broadcast on demand according to the request of the terminal device. By replacing any set of pre-configured random access resources corresponding to the second cell with the pre-configured random access resources corresponding to the first cell, the pre-configured random access resources corresponding to the first cell can be reused, avoiding resource waste and improving resource utilization.

[0173] In some other embodiments of this application, the pre-configured random access resources corresponding to the first cell are determined by the first configuration information. SIB1 includes a system information request resource field, which is used to indicate the target random access resources.

[0174] The first configuration information sent by the network device to the terminal device may include a system information request resource field, which may indicate the target random access resource corresponding to the second cell determined in step 501. For example, the system information request resource field may be si-RequestResource. The first configuration information may also be wake-up signal configuration information, which may include the system information request resource field. In this embodiment, other configuration information exchanged between the network device and the terminal device may also indicate the target random access resource.

[0175] For the solutions in steps A11 to A13, the following example illustrates the approach:

[0176] In NR network equipment, when an NES cell transitions to Cell A, the UE can use the reserved resources in the WUS configuration message. This application provides a method for configuring resources via the WUS configuration message. When an NES cell transitions to Cell A, the UE can either reuse the random access resources originally allocated to OD-SIB1 to initiate OD-OSI according to network equipment instructions, or it can choose not to use the random access resources reserved for OD-SIB1 according to network equipment instructions. When the cell transitions back to an NES cell, the UE can then reuse these random access resources for OD-SIB1.

[0177] In this embodiment, taking the increase of available Msg1-based OD-OSI resources as an example, when the NES cell transitions to Cell A, the network device updates the OSI scheduling information in the SIB1 message and then broadcasts the updated SIB1 message. Specifically, the preamble, PRACH resources, and other random access resources originally allocated to OD-SIB1 in the WUS configuration information of this cell are replaced or added to the si-RequestResource parameter; the UE can then use the newly added set of random access resources to initiate Msg1-based OD-OSI.

[0178] In Msg1-based OD-OSI, network devices configure the si-RequestConfig parameter to pre-allocate random access resources such as preamble and PRACH resources for OD-OSI. Specifically, this can be configured through the si-RequestReource parameter.

[0179] Assuming that there are m on-demand broadcast OSIs in a cell based on UE requests, where m≥0. According to the above protocol description, the si-RequestReource parameter can include N sets of random access resources, 1≤N≤m; if N=1, when the UE initiates an OD-OSI request each time, it requests all m OSIs that are broadcast on demand based on UE requests. If N>1, each set of random access resources corresponds to a specific on-demand broadcast OSI based on UE requests.

[0180] When N=1, the preamble and PRACH resources originally allocated to OD-SIB1 are used to replace the preamble and PRACH resources configured in the si-RequestReource parameter of the current cell.

[0181] When N>1 and N<m, the preamble and PRACH resources originally allocated to OD-SIB1 are added to the si-RequestResource parameter, and the adding position or order depends on the implementation of the network device.

[0182] When N>1 and N=m, the preamble and PRACH resources originally allocated to OD-SIB1 are used to replace any set of preamble and PRACH resources configured in the si-RequestReource parameter of the current cell.

[0183] In the embodiment of the present application, for the scenario where an NES cell is converted into a Cell A, by changing si-RequestResource, the UE is instructed to re-initiate OD-OSI by using random access resources such as the preamble and PRACH resources originally allocated by the network device to OD-SIB1, which improves the utilization rate of random access resources of the cell.

[0184] In some other embodiments of the present application, the pre-configured random access resource corresponding to the first cell is used to request SIB1;

[0185] The second cell is configured to instruct to use a contention-based random access request mode to request other system information (OSI);

[0186] Step 501: the network device determines the target random access resource corresponding to the second cell, including:

[0187] B1. The network device configures the pre-configured random access resource corresponding to the first cell as the target random access resource, and the target random access resource includes: the pre-configured random access resource corresponding to the first cell.

[0188] The pre-configured random access resources corresponding to the first cell are the random access resources pre-configured by the network device for the first cell, and these pre-configured random access resources are used to request SIB1. The pre-configured random access resources corresponding to the second cell are the random access resources pre-configured by the network device for the second cell, and these pre-configured random access resources are used to request OSI. The OSI request adopts a contention-based random access request method; please refer to the previous section. Figure 4 The diagram illustrates the request method for contention-based random access. The network device can determine the target random access resource for the second cell based on the pre-configured random access resource corresponding to the first cell. For example, the network device can configure the pre-configured random access resource corresponding to the first cell as the target random access resource corresponding to the second cell. In a contention-based random access scenario, the network device no longer configures the pre-configured random access resource corresponding to the second cell. When requesting OSI using a contention-based random access request method, the network device can determine the target random access resource for the second cell. This provides an implementation scheme for the target random access resource of the second cell in the case of handover from the first cell to the second cell, improving the implementability of the embodiments of this application.

[0189] For the solution in step B1, an example is given below:

[0190] Configure the request resource for MSG3 based OD-OSI and convert the resource to MSG1 based OD-OSI.

[0191] When the NES cell transitions to Cell A, the network device updates the OSI scheduling information in the SIB1 message and then broadcasts the SIB1 message. Specifically, the preamble and RACH resources originally allocated to OD-SIB1 in the WUS configuration information of this cell are configured in the si-RequestResource parameter. The UE initiates MSG1-based OD-OSI based on the newly configured si-RequestResource parameter, requesting all OSIs broadcast on demand according to the UE's request.

[0192] In MSG3-based OD-OSI, network devices do not configure si-RequestConfig and do not allocate random access resources for OD-OSI. All UEs can only attempt to initiate OD-OSI via CBRA. When a large number of UEs initiate CBRA in the network device, contention conflicts may occur frequently. If the contention fails, the UE can only wait for a period of time before re-initiating MSG3-based OD-OSI. Multiple contention failures will severely affect the UE experience.

[0193] As can be seen from the foregoing embodiments, if the si-RequestResource parameter is configured with only one set of random access resources, then each time the UE initiates an OD-OSI request, it can request all m OSIs broadcast on demand according to the UE's request. Therefore, in this embodiment, the random access resources originally allocated to OD-SIB1 are configured to the si-RequestResource parameter, transforming the MSG3-based OD-OSI into an MSG1-based OD-OSI.

[0194] In this embodiment of the application, for the scenario of NES cell being converted to Cell A, the MSG3 based OD-OSI is converted to MSG1 based OD-OSI by configuring the si-RequestResource parameter. All OSIs are broadcast on demand according to the UE request in a single request, which improves the efficiency of the UE in obtaining the on-demand broadcast OSI, reduces the probability of random access contention, and better protects the UE experience.

[0195] In some other embodiments of this application, step 501, the network device determines the target random access resource corresponding to the second cell, including:

[0196] C1. The network device determines the target random access resources, including: the pre-configured random access resources corresponding to the second cell;

[0197] Among them, the pre-configured random access resources corresponding to the first cell are used to send SIB1 based on the terminal device's request when the network device switches back to the first cell from the second cell.

[0198] In the case of a network device switching from a first cell to a second cell, the network device may not occupy the pre-configured random access resources corresponding to the first cell, but retain those resources. The pre-configured random access resources of the first cell are then used to send SIB1 based on a request from the terminal device when the network device switches back from the second cell to the first cell, thus pre-configuring random access resources for the second cell. This provides an implementation scheme for the target random access resources of the second cell in the case of a switch from the first cell to the second cell, improving the implementability of the embodiments of this application.

[0199] For example, in this embodiment, the reserved resources corresponding to the first cell are not used, but are still reserved for OD-SIB1. When the NES cell is converted to Cell A, the network device broadcasts the SIB1 message. This SIB1 message is not updated. The preamble and RACH resources in the WUS configuration information are reserved for the UE to initiate OD-SIB1 when the cell is converted to NES next time. The UE initiates OD-OSI according to the existing si-RequestResource configuration.

[0200] Considering the possibility of a brief handover from an NES cell to Cell A and then back to an NES cell in an NES scenario, reconfiguring the si-RequestResource in this case would require network devices to continuously update and send system messages within a short period, and the UE would also need to continuously listen for and receive system message changes, increasing the power consumption of both network devices and terminals. Therefore, to ensure the normal operation of the OD-SIB1 process after reverting to an NES cell, this application proposes that in continuous handover scenarios, when an NES cell transitions to Cell A, the random access resources in the WUS configuration message should still be reserved for the UE to initiate OD-SIB1 the next time the cell transitions to an NES cell.

[0201] In this application embodiment, for the continuous handover scenario where an NES cell briefly switches to Cell A and then switches back to an NES cell, it is proposed to reserve the preamble and RACH resources reserved in the initial WUS configuration information for the UE to initiate OD-SIB1 when the cell is converted to an NES cell next time. This ensures the normal progress of the OD-SIB1 process and avoids the increase in energy consumption caused by continuous reconfiguration.

[0202] In other embodiments of this application, the method performed by the network device may further include steps D2 and D3; correspondingly, the method performed by the terminal device may further include steps D1 and D4.

[0203] D1. The terminal device sends an OSI request to the network device through the target random access resource;

[0204] D2. The network device receives the OSI request sent by the terminal device through the target random access resource;

[0205] D3. Network devices send OSI signals to terminal devices.

[0206] D4. The terminal device receives the OSI from the network device.

[0207] In this context, the target random access resource corresponding to the second cell can be used by the terminal device to send an OSI request. The terminal device sends the OSI request to the network device through the target random access resource. The network device can receive the OSI request using the target random access resource, and then the network device can send an OSI request to the terminal device. The terminal device receives the OSI request from the network device, thereby realizing system information interaction between the network device and the terminal device, as described above. Figure 3 and Figure 4 This refers to the OSI request and OSI interaction methods.

[0208] As illustrated by the foregoing embodiments, in this application embodiment, the network device can switch back and forth between a first cell and a second cell. The first cell is used to indicate the transmission of SIB1 based on a request from a terminal device; for example, the first cell is a network energy-saving cell or an NES cell. The second cell is used to indicate the periodic broadcast of SIB1; for example, the second cell is a non-network energy-saving cell or a Cell A cell. When the network device switches from the first cell to the second cell, the network device determines the target random access resource corresponding to the second cell from at least one of the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell. The network device then sends SIB1 to the terminal device located in the second cell. SIB1 indicates the target random access resource, thus enabling flexible configuration of random access resources for the second cell and improving resource utilization.

[0209] This application provides a method for utilizing WUS configuration information resources. When an NES cell transitions to Cell A, the UE can reuse the random access resources originally allocated to OD-SIB1 to initiate OD-OSI according to network device instructions. If the NES cell is configured with si-RequestConfig and uses MSG1-based OD-OSI, when the NES cell transitions to Cell A, the preamble and RACH resources originally allocated to OD-SIB1 in the cell's WUS configuration message can be replaced or added to si-RequestResource. If the NES cell is not configured with si-RequestConfig and uses MSG3-based OD-OSI, when the NES cell transitions to Cell A, the preamble and RACH resources originally allocated to OD-SIB1 in the cell's WUS configuration message can be configured in si-RequestResource. When the NES cell transitions to Cell A, the UE can, according to network device instructions, not use the random access resources reserved for OD-SIB1, and then use these reserved resources for OD-SIB1 when the cell transitions back to NES. In NR network equipment, for scenarios where NES cells and Cell A can switch between each other, a WUS configuration resource utilization method is proposed, which improves the utilization rate of random access resources, reduces the probability of random access contention, and ensures UE experience.

[0210] In other embodiments of this application, the embodiments of this application may also provide a scheme for instructing the NES UE to receive SIB1 of the NES cell based on the content of WUS configuration information. The PDCCH-ConfigSIB1 field in the protocol's MIB can indicate the time-frequency domain parameters for the UE to receive SIB1. For example, these time-frequency domain parameters may include: searchSpaceZero and controlResourceSetZero. controlResourceSetZero represents the frequency domain resource configuration of CORESET 0, including the number of resource blocks, the number of symbols, and the frequency domain offset. searchSpaceZero defines the time domain characteristics of PDCCH search space 0, including the period, offset, number of time slots, and starting symbol position. Specifically, PDCCH-ConfigSIB1 consists of 8 bits and can be used to configure the control resource set CORESET#0 of the common search space and the listening timing of SIB1. The high 4 bits indicate the control resource set CORESET#0 used by SIB1, including the number of consecutive resource blocks in the frequency domain and the number of consecutive symbols in the time domain; while the low 4 bits indicate the PDCCH monitoring occupancy (MO) position in the SIB1 common search space.

[0211] In NES scenarios, WUS configuration information can also provide the time-frequency domain parameters searchSpaceZero and controlResourceSetZero for receiving SIB1 in an NES cell. This application embodiment also addresses the issue of how to indicate time-frequency domain parameters through WUS configuration information.

[0212] Please see Figure 6 As shown, another communication method provided in this application embodiment is applied to terminal devices and network devices, and mainly includes the following steps:

[0213] 601. The network device obtains first configuration information, which is used to indicate whether to provide time-frequency domain parameters for the terminal device to receive SIB1.

[0214] In this embodiment, the network device can obtain the size of the first configuration information, which is finite. The network device can determine whether to provide the terminal device with time-frequency domain parameters for receiving SIB1. The network device can generate the first configuration information, which is used to indicate whether to provide the terminal device with time-frequency domain parameters for receiving SIB1. For example, the first configuration information can be configuration information sent by the network device to the terminal device. For example, the first configuration information can be the aforementioned wake-up signal configuration information. In this embodiment, the first configuration information is not limited to other dedicated time-frequency domain parameters for instructing the terminal device to receive SIB1. In this embodiment, the determination of whether the first configuration information indicates the provision of time-frequency domain parameters for the terminal device to receive SIB1 can be flexible, thereby reducing the content of the first configuration information, improving transmission efficiency, and reducing transmission energy consumption.

[0215] In some embodiments of this application, the first configuration information includes: a first field;

[0216] The first field is the first value, which is used to indicate the time-frequency domain parameters provided by the terminal device for receiving SIB1;

[0217] or,

[0218] The first field is the second value, used to indicate that the time-frequency domain parameters for receiving SIB1 by the terminal device are not provided.

[0219] The first field can be a newly added field, a reserved field, or a function-reused field in the first configuration information. It indicates whether the time-frequency domain parameters for the terminal device to receive SIB1 are provided. The position of the first field in the first configuration information is not limited. The first field can have multiple values; for example, it can be a first value indicating that the time-frequency domain parameters for the terminal device to receive SIB1 are provided, or it can be a second value indicating that the time-frequency domain parameters for the terminal device to receive SIB1 are not provided. The specific values ​​of the first and second values ​​are not limited here. In this embodiment, the first field in the first configuration information can flexibly indicate whether the time-frequency domain parameters for the terminal device to receive SIB1 are provided.

[0220] In other embodiments of this application, the method performed by the terminal device may further include steps E1 and E2:

[0221] E1. If the first configuration information does not provide time-frequency domain parameters for the terminal device to receive SIB1, the terminal device receives the MIB from the network device;

[0222] E2. The terminal device determines the time-frequency domain parameters of SIB1 received by the terminal device based on the MIB.

[0223] In this configuration, the first configuration information may not provide the time-frequency domain parameters for the terminal device to receive SIB1. The network device can reduce the content indicated by the first configuration information to improve the transmission efficiency of the first configuration information. In this case, the terminal device cannot obtain the time-frequency domain parameters for receiving SIB1 through the first configuration information. The terminal device receives the MIB from the network device, and the terminal device determines the time-frequency domain parameters for receiving SIB1 based on the MIB. That is, the MIB can provide the time-frequency domain parameters for the terminal device to receive SIB1, and the terminal device can obtain the time-frequency domain parameters for receiving SIB1.

[0224] For example, for Type 0 PDCCH monitoring occasions of on-demand SIB1, if the SSB on the NES cell is located on the sync raster, the search space zero and control resource set zero required for on-demand SIB1 will be provided from the WUS configuration information of the uplink (UL). The NES UE has two ways to obtain the time-frequency domain parameters for receiving SIB1 in the NES cell: by receiving the MIB confirmation from the NES cell, or by confirming based on the content of the WUS configuration information.

[0225] In this embodiment, considering the limited size of WUS configuration information, it is proposed that whether the WUS configuration information of the NES cell provides time-frequency domain parameters for receiving SIB1 is optional, depending on the network implementation. The UE determines whether it needs to confirm the time-frequency domain parameters for receiving SIB1 based on the PDCCH-ConfigSIB1 field in the MIB, depending on whether the WUS configuration information provides such parameters. For example, if the WUS configuration information does not provide time-frequency domain parameters for receiving SIB1, the UE must obtain the latest MIB information of the NES cell to confirm the time-frequency domain parameters for receiving SIB1.

[0226] In other embodiments of this application, the method performed by the terminal device may further include steps F1 and F2:

[0227] F1. The terminal device receives the MIB from the network device;

[0228] F2. If the first configuration information does not provide time-frequency domain parameters for the terminal device to receive SIB1, and the MIB does not provide time-frequency domain parameters for the terminal device to receive SIB1, the terminal device sends an on-demand request for the first system information block OD-SIB1 to the network device.

[0229] In cases where the first configuration information does not provide the time-frequency domain parameters for the terminal device to receive SIB1, the MIB received by the terminal device also does not provide these parameters. In this situation, the terminal device sends an On-Demand Request for a First System Information Block (OD-SIB1) to the network device. The network device can broadcast the MIB and receive it again until the time-frequency domain parameters for receiving SIB1 are determined. Even if the terminal device cannot obtain the time-frequency domain parameters for receiving SIB1 through the first configuration information and the MIB, it can still send an OD-SIB1 request to obtain these parameters.

[0230] For example, PDCCH-ConfigSIB1 in the MIB is not always used to provide the time-frequency domain parameters for receiving SIB1. If neither the WUS configuration information nor the MIB provides the time-frequency domain parameters for receiving SIB1, the NES UE needs to initiate an OD-SIB1 request before receiving the MIB again until the time-frequency domain parameters for receiving SIB1 are confirmed.

[0231] In other embodiments of this application, the method performed by the terminal device may further include step G1:

[0232] G1. If the first configuration information provides the time-frequency domain parameters for the terminal device to receive SIB1, the terminal device determines whether to receive the MIB from the network device.

[0233] In this embodiment, where the first configuration information provides the time-frequency domain parameters for the terminal device to receive SIB1, the terminal device can also independently determine whether to receive the MIB from the network device. That is, the terminal device can flexibly determine the time-frequency domain parameters for receiving SIB1, for example, through the first configuration information or through the network device's MIB; no limitation is made here. This application embodiment enables the terminal device to flexibly determine the time-frequency domain parameters for receiving SIB1.

[0234] For example, the WUS configuration information provides the time-frequency domain parameters for receiving SIB1. The UE can decide whether it needs to confirm the time-frequency domain parameters for receiving SIB1 in the MIB according to its own needs. If the time-frequency domain parameters for receiving SIB1 provided in the WUS configuration information and the MIB are inconsistent, the time-frequency domain parameters for receiving SIB1 provided in the MIB shall prevail.

[0235] 602. The network device sends first configuration information to the terminal device. Correspondingly, 603. The terminal device receives the first configuration information from the network device, the first configuration information being used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1.

[0236] 604. The terminal device determines whether the first configuration information provides time-frequency domain parameters for the terminal device to receive SIB1.

[0237] In this process, the network device sends first configuration information, and the terminal device can receive the first configuration information. The terminal device determines whether to provide the time-frequency domain parameters for receiving the first system information block SIB1 based on the first configuration information. That is, the first configuration information includes optional options, and the terminal device determines whether to indicate the time-frequency domain parameters for receiving SIB1 through the optional options.

[0238] As can be seen from the foregoing examples, in this embodiment of the application, the network device obtains the first configuration information, which is used to indicate whether to provide the time-frequency domain parameters for the terminal device to receive SIB1. The network device can flexibly determine whether the first configuration information indicates whether to provide the time-frequency domain parameters for the terminal device to receive SIB1, thereby reducing the content of the first configuration information, improving transmission efficiency, and reducing transmission energy consumption.

[0239] For example, in this embodiment of the application, in response to the problem of WUS configuration information size limitation, a method is proposed to selectively provide SIB1 reception parameters in WUS configuration information, instructing NES UE to obtain SIB1 messages by combining WUS configuration information with NES cell MIB information. This can reduce the content of WUS configuration information, improve transmission efficiency, reduce transmission energy consumption, and further realize network energy saving.

[0240] It should be understood that Figures 1 to 6The flowcharts or scene diagrams shown are for illustrative purposes only and are not intended to limit the embodiments of this application to the examples illustrated. In fact, those skilled in the art can interpret the embodiments based on... Figures 1 to 6 The examples in the document can be transformed into equivalent ways to obtain more implementations.

[0241] The above text combined Figures 1 to 6 This document describes in detail the communication method provided in the embodiments of this application. The following will combine... Figures 7 to 8 The device embodiments of this application are described in detail below. It should be understood that the communication device of this application embodiment can execute the various communication methods of the foregoing embodiments of this application, that is, the specific working processes of the various products below can be referred to the corresponding processes in the foregoing method embodiments.

[0242] In the embodiments described above, the terminal device may execute some or all of the steps in each embodiment; the network device may execute some or all of the steps in each embodiment. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the steps may be executed in different orders as presented in the embodiments, and it is not necessary to execute all the operations in the embodiments of this application. Moreover, the sequence number of each step does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0243] Figure 7 This is a schematic block diagram of a communication device provided in an embodiment of this application. Figure 7 As shown, the communication device 700 may include a communication module 720. The communication module 720 can implement corresponding communication functions, which can be internal communication functions of the communication device 700 or communication functions between the communication device 700 and other devices. Optionally, the communication module 720 may also be referred to as a communication interface or transceiver module. Optionally, the communication device 700 further includes a processing module 710. The processing module 710 can implement corresponding processing functions.

[0244] Optionally, the communication device 700 further includes a storage module, which can be used to store instructions and / or data; the processing module 710 can read the instructions and / or data in the storage module so that the communication device 700 can implement the aforementioned method embodiments.

[0245] In one possible design, the communication device 700 may correspond to the network device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the network device. The communication device 700 can be used to perform the steps or processes performed by the network device in any of the above method embodiments.

[0246] For example, the processing module 710 is configured to determine the target random access resource corresponding to the second cell when the network device switches from the first cell to the second cell, wherein the target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell; the first cell is configured to instruct the sending of a first system information block SIB1 based on a request from the terminal device, and the second cell is configured to instruct the periodic broadcasting of the SIB1;

[0247] The communication module 720 is used to send the SIB1 to the terminal device located in the second cell, the SIB1 being used to indicate the target random access resource.

[0248] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0249] In one possible design, the communication device 700 may correspond to the network device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the network device. The communication device 700 can be used to perform the steps or processes performed by the network device in any of the above method embodiments.

[0250] For example, the communication module 720 is configured to receive a first system information block (SIB1) sent by a network device after it switches from a first cell to a second cell. The terminal device is located in the second cell. The SIB1 is configured to indicate a target random access resource, which includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell. The first cell is configured to indicate that the SIB1 is sent based on a request from the terminal device, and the second cell is configured to indicate that the SIB1 is periodically broadcast.

[0251] The processing module 710 is used to determine the target random access resource indicated by SIB1.

[0252] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0253] In one possible design, the communication device 700 may correspond to the terminal device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the terminal device. The communication device 700 can be used to perform the steps or processes performed by the terminal device in any of the above method embodiments.

[0254] For example, the communication module 720 is used to receive first configuration information from the network device, the first configuration information being used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1;

[0255] The processing module 710 is used to determine whether the first configuration information provides time-frequency domain parameters for the terminal device to receive the SIB1.

[0256] In one possible design, the communication device 700 may correspond to the network device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the network device. The communication device 700 can be used to perform the steps or processes performed by the network device in any of the above method embodiments.

[0257] For example, the processing module 710 is used to obtain first configuration information, which is used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1;

[0258] The communication module 720 is used to send the first configuration information to the terminal device.

[0259] Figure 8 This is another schematic block diagram of the communication device 800 provided in the embodiments of this application. The communication device 800 may be a chip, chip system, or processor, etc., in a terminal device or network device that implements the above-described methods. The communication device 800 can be used to implement the methods described in the above-described method embodiments; for details, please refer to the descriptions in the above-described method embodiments.

[0260] like Figure 8 As shown, the communication device 800 may include one or more processors 810, which may also be referred to as processing units or processing modules, and can implement certain control functions. The processor 810 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device 800 (e.g., a base station, baseband chip, user, user chip), execute software programs, and process data from the software programs.

[0261] In an alternative design, the processor 810 may also store instructions and / or data that can be executed by the processor 810 to cause the communication device 800 to perform the methods described in the above method embodiments.

[0262] In another alternative design, the communication device 800 may include a communication interface 820 for implementing receiving and transmitting functions. For example, the communication interface 820 may be a transceiver circuit, interface, interface circuit, or transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or it may be used for transmitting or relaying signals.

[0263] Optionally, the communication device 800 may include one or more memories 830, which may store instructions that can be executed on the processor 810, causing the communication device 800 to perform the methods described in the above method embodiments. Optionally, the memories 830 may also store data. Optionally, the processor 810 may also store instructions and / or data. The processor 810 and the memories 830 may be provided separately or integrated together.

[0264] It should be understood that, in one possible design, the steps in the method embodiments provided in this application can be implemented by integrated logic circuits in the processor's hardware or by instructions in software form. The steps of the methods disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0265] In one implementation, the communication device 800 may correspond to the terminal device in the above method embodiments and may be used to execute the various steps and / or processes executed by the terminal device in the above method embodiments. The processor 810 may be used to execute instructions stored in the memory 830, and when the processor 810 executes the instructions stored in the memory, the processor 810 is used to execute the various steps and / or processes of the above method embodiments corresponding to the terminal device.

[0266] In another implementation, the communication device 800 may correspond to the network device in the above method embodiments and may be used to execute the various steps and / or processes executed by the network device in the above method embodiments. The processor 810 may be used to execute instructions stored in the memory 830, and when the processor 810 executes the instructions stored in the memory, the processor 810 is used to execute the various steps and / or processes of the above method embodiments corresponding to the network device.

[0267] It should be understood that the aforementioned processing device can be one or more chips. For example, the processing device can be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0268] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0269] According to the method provided in the embodiments of this application, this application also provides a chip system, which includes one or more processors for calling and executing instructions stored in memory, thereby causing the method described in the embodiments of this application to be executed. The chip system may be composed of chips or may include chips and other discrete devices.

[0270] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data.

[0271] According to the method provided in the embodiments of this application, this application also provides a communication system, which includes the aforementioned network device and terminal device.

[0272] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or terminal device in any of the foregoing method embodiments.

[0273] According to the method provided in the embodiments of this application, this application also provides a computer-readable storage medium storing program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or terminal device in any of the foregoing method embodiments.

[0274] The computer-readable storage medium may be the aforementioned volatile memory or non-volatile memory, or it may include both volatile memory and non-volatile memory.

[0275] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. This application does not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0276] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated.

[0277] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0278] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0279] In summary, the above description is merely a preferred embodiment of the technical solution of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A communication method, characterized in that, The method is applied to a network device, and the method includes: When the network device switches from the first cell to the second cell, a target random access resource corresponding to the second cell is determined, wherein the target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell; the first cell is used to indicate sending a first system information block SIB1 based on a request from the terminal device, and the second cell is used to indicate periodically broadcasting the SIB1; The SIB1 is sent to the terminal device located in the second cell, and the SIB1 is used to indicate the target random access resource.

2. The method according to claim 1, characterized in that, The pre-configured random access resources corresponding to the first cell are used to request SIB1; The pre-configured random access resources corresponding to the second cell are used to request other system information (OSI), and the request for OSI adopts a request method based on non-contention-based random access. Determining the target random access resource corresponding to the second cell includes: The target random access resource corresponding to the second cell is determined based on the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell.

3. The method according to claim 2, characterized in that, The second cell is used to indicate m OSIs, where m is a positive integer, and the SIB1 is used to indicate N sets of random access resources, where N is a positive integer; The step of determining the target random access resource corresponding to the second cell based on the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell includes: When N equals 1, the pre-configured random access resource corresponding to the second cell is replaced with the pre-configured random access resource corresponding to the first cell to obtain the target random access resource, which includes the pre-configured random access resource corresponding to the first cell. or, When N is greater than 1 and N is less than m, the pre-configured random access resource corresponding to the first cell is added to the target random access resource, and the target random access resource includes: the pre-configured random access resource corresponding to the first cell and the pre-configured random access resource corresponding to the second cell; or, When N is greater than 1 and N is equal to m, any set of pre-configured random access resources corresponding to the second cell is replaced with the pre-configured random access resources corresponding to the first cell to obtain the target random access resources. The target random access resources include: the pre-configured random access resources corresponding to the first cell and the pre-configured random access resources corresponding to the second cell that have not been replaced.

4. The method according to claim 1, characterized in that, The pre-configured random access resources corresponding to the first cell are used to request SIB1; The second cell is used to indicate the use of a contention-based random access request method to request other system information (OSI). Determining the target random access resource corresponding to the second cell includes: Configure the pre-configured random access resource corresponding to the first cell as the target random access resource, wherein the target random access resource includes: the pre-configured random access resource corresponding to the first cell.

5. The method according to claim 1, characterized in that, Determining the target random access resource corresponding to the second cell includes: The target random access resource is determined as follows: the pre-configured random access resource corresponding to the second cell; The pre-configured random access resources corresponding to the first cell are used to send the SIB1 based on the request of the terminal device when the network device switches back from the second cell to the first cell.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Receive the OSI request sent by the terminal device through the target random access resource; The OSI is sent to the terminal device.

7. The method according to any one of claims 1 to 6, characterized in that, The pre-configured random access resource corresponding to the first cell is determined by the first configuration information. The SIB1 includes a system information request resource field, which is used to indicate the target random access resource.

8. A communication method, characterized in that, The method is applied to a terminal device, and the method includes: The terminal device receives a first system information block (SIB1) sent after switching from a first cell to a second cell. The terminal device is located in the second cell. The SIB1 is used to indicate a target random access resource. The target random access resource includes at least one of the following: a pre-configured random access resource corresponding to the first cell, and a pre-configured random access resource corresponding to the second cell. The first cell is used to indicate that the SIB1 is sent based on a request from the terminal device, and the second cell is used to indicate that the SIB1 is broadcast periodically.

9. The method according to claim 8, characterized in that, The method further includes: Send other system information OSI requests to the network device through the target random access resource; Receive the OSI from the network device.

10. A communication method, characterized in that, The method is applied to a terminal device, and the method includes: Receive first configuration information from the network device, the first configuration information being used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1; Determine whether the first configuration information provides time-frequency domain parameters for the terminal device to receive the SIB1.

11. The method according to claim 10, characterized in that, The method further includes: If the first configuration information does not provide time-frequency domain parameters for the terminal device to receive the SIB1, the main information block (MIB) from the network device is received. The time-frequency domain parameters of the SIB1 received by the terminal device are determined based on the MIB.

12. The method according to claim 10, characterized in that, The method further includes: Receive MIB from the network device; If the first configuration information does not provide time-frequency domain parameters for the terminal device to receive the SIB1, and the MIB does not provide time-frequency domain parameters for the terminal device to receive the SIB1, a first system information block OD-SIB1 request is sent to the network device.

13. The method according to claim 10, characterized in that, The method further includes: If the first configuration information provides the terminal device with the time-frequency domain parameters for receiving the SIB1, it is determined whether to receive the MIB from the network device.

14. A communication method, characterized in that, The method is applied to a network device, and the method includes: Obtain first configuration information, which is used to indicate whether to provide time-frequency domain parameters for the terminal device to receive the first system information block SIB1; The first configuration information is sent to the terminal device.

15. The method according to claim 14, characterized in that, The first configuration information includes: a first field; The first field is a first value, used to indicate the time-frequency domain parameters for receiving the SIB1 by the terminal device; or, The first field is the second value, used to indicate that the time-frequency domain parameters for receiving the SIB1 are not provided by the terminal device.

16. A communication device, characterized in that, The device includes at least one processor coupled to a memory storing a program or instructions, the processor executing the program or instructions to cause the device to perform the method as described in any one of claims 1 to 15.

17. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, they cause the computer to perform the method as described in any one of claims 1 to 15.

18. A communication system, characterized in that, Includes the communication device as described in claim 16.

19. A chip system comprising one or more processors, the one or more processors being configured to retrieve and execute instructions stored in memory, such that the method of any one of claims 1 to 15 is performed.

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