Communication method and communication apparatus

Abstract

Embodiments of the present application provide a communication method and a communication apparatus, which can meet the demand for low network energy consumption. The method comprises: a first terminal device receives first configuration information and / or second configuration information from a first access network device, the first configuration information comprising uplink and downlink configuration information of a first cell where the first terminal device is located, and / or configuration information of a physical downlink control channel (PDCCH) search space set for a random access response (RAR) message of the first cell, and the second configuration information being used for indicating configuration information of an SSB of the first cell, wherein the first configuration information is indicated by means of a first SIB message, and the second configuration information is indicated by means of a second SIB message; and the first terminal device completes reception of a first SIB1 and / or a first SSB on the basis of the first configuration information and / or the second configuration information.

Description

Communication methods and communication devices Technical Field

[0001] This application relates to the field of communications, and more specifically, to communication methods and communication devices. Background Technology

[0002] Network energy conservation is crucial for environmental sustainability, reducing environmental impact (greenhouse gas emissions), and saving operating costs. With the widespread adoption of wireless communication network technology across various industries and regions, and its application in more advanced applications and higher-speed services, communication networks are becoming denser, using more antennas, larger bandwidths, and more frequency bands, resulting in greater energy consumption. Energy consumption has become a key component of operators' operating expenses (OPEX), with mobile network energy costs accounting for approximately 23% of operators' total costs, and the majority of this energy consumption originating from the radio access network (RAN). RAN power consumption is divided into two parts: a dynamic component, which refers to the energy consumed during data transmission / reception, and a static component, which refers to the energy consumed to maintain the necessary operation of the wireless network equipment when there is no data transmission / reception.

[0003] Therefore, communication networks need to research solutions to reduce network energy consumption, minimize the environmental impact of network energy consumption, and lower operator costs. Summary of the Invention

[0004] This application provides a communication method and a communication device that can meet the needs of low network power consumption.

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

[0006] Firstly, a communication method is provided. This method can be executed by a first terminal device, or by a component of the first terminal device, such as a processor, chip, or chip system, or by a logic module or software capable of implementing all or part of the functions of the first terminal device. Taking the method being executed by the first terminal device as an example, the method includes: the first terminal device receiving first configuration information and / or second configuration information from a first access network device. The first configuration information includes uplink and downlink configuration information of a first cell where the first terminal device is located, and / or configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell. The first configuration information is indicated by a first SIB message, and the second configuration information is indicated by a second SIB message. The first terminal device completes the reception of the first SIB and / or the first SSB according to the first configuration information and / or the second configuration information.

[0007] Secondly, a communication method is provided. This method can be executed by a first access network device, or by a component of the first access network device, such as its processor, chip, or chip system, or by a logic module or software capable of implementing all or part of the functions of the first access network device. Taking the method being executed by a target access network device as an example, the method includes: the first access network device sending first configuration information and / or second configuration information to a first terminal device. The first configuration information includes uplink and downlink configuration information of a first cell where the first terminal device is located, and / or configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell. The first configuration information is indicated via a first SIB message, and the second configuration information is indicated via a second SIB message.

[0008] Thirdly, a communication device is provided for implementing the various methods described above. This communication device may be the first terminal device as described in the first aspect, or a device included in the first terminal device, such as a chip; or, the communication device may be the first access network device as described in the second aspect, or a device included in the first access network device, such as a chip.

[0009] The communication device includes modules, units, or means that implement the above methods. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0010] In some possible designs, the communication device may include a processing module and a communication module. The communication module may include an output module (or transmitting module) and an input module (or receiving module), respectively used to implement the output (or transmitting) and input (or receiving) functions in any of the above aspects and any possible designs. The processing module can be used to implement the processing functions in any of the above aspects and any possible designs.

[0011] Optionally, the communication device also includes a storage module for storing program instructions and data.

[0012] Fourthly, a communication device is provided, comprising: at least one processor configured to execute computer programs or instructions, or to cause the communication device to perform the method described in any of the preceding aspects via logic circuitry. The communication device may be a first terminal device as described in the first aspect, or a device included in the first terminal device, such as a chip; or, the communication device may be a first access network device as described in the second aspect, or a device included in the first access network device, such as a chip.

[0013] In some possible designs, the communication device also includes a memory for storing configuration files of computer instructions and / or logic circuits. Optionally, the memory is integrated with the processor, or the memory is independent of the processor.

[0014] In one possible design, the communication device also includes a communication interface for inputting and / or outputting signals.

[0015] In some possible designs, the communication interface is an interface circuit used to read and write computer instructions. For example, the interface circuit is used to receive computer execution instructions (which are stored in memory and may be read directly from memory or may pass through other devices) and transmit them to the processor.

[0016] In some possible designs, this communication interface is used to communicate with modules outside the communication device.

[0017] In some possible designs, the communication device can be a chip system. When the communication device is a chip system, the chip system may include chips, or it may contain chips and other discrete components.

[0018] Fifthly, a communication device is provided, comprising: a logic circuit and an interface circuit; the interface circuit is used for inputting information and / or outputting information; the logic circuit is used to execute the method described in any of the preceding aspects, processing the input information and / or generating the output information. The communication device may be a first terminal device as described in the first aspect, or a device included in the first terminal device, such as a chip; or, the communication device may be a first access network device as described in the second aspect, or a device included in the first access network device, such as a chip.

[0019] In a sixth aspect, a computer-readable storage medium is provided that stores a computer program or instructions that, when executed by a processor, cause the methods described in any of the preceding aspects to be performed.

[0020] In a seventh aspect, a computer program product is provided, which, when executed by a processor, causes the method described in any of the preceding aspects to be performed.

[0021] It is understood that when the communication device provided by any of the third to fifth aspects is a chip, the aforementioned sending action / function can be understood as output information, and the aforementioned receiving action / function can be understood as input information.

[0022] Eighthly, a communication system is provided, which includes one or more means according to any of the above aspects.

[0023] The technical effects of any of the design methods in aspects seven through nine can be found in the technical effects of different design methods in aspects one or two above, and will not be repeated here. Attached Figure Description

[0024] Figure 1 is a schematic diagram showing that there are three multiplexing modes between SSB and CORESET0 provided in the embodiments of this application;

[0025] Figure 2 is a schematic diagram of the terminal device provided in the embodiment of this application listening to type0 PDCCH according to the SSB index at some PDCCH listening times;

[0026] Figure 3 is a schematic diagram of the OD SIB1 scenario provided in the embodiment of this application;

[0027] Figure 4 is a schematic diagram of contention / non-contention random access and 4-step / 2-step random access provided in the embodiments of this application;

[0028] Figure 5 is a schematic diagram of the NR SSB pattern provided in the embodiments of this application;

[0029] Figure 6 is a schematic diagram of the correspondence between PRACH occasion and SSB provided in the embodiments of this application;

[0030] Figure 7 is a schematic diagram of an example of a communication system provided in an embodiment of this application;

[0031] Figure 8 is a schematic diagram of another example of the communication system provided in the embodiments of this application;

[0032] Figure 9 is a schematic diagram of the structure of the communication device 900 provided in an embodiment of this application;

[0033] Figures 10 to 12 are schematic diagrams of an example of the communication method provided in the embodiments of this application;

[0034] Figure 13 is a schematic diagram of another example of the communication method provided in the embodiments of this application;

[0035] Figure 14 is a schematic diagram of a communication device provided in an embodiment of this application. Detailed Implementation

[0036] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0037] In the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following or similar expressions" refers to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b and / or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0038] Furthermore, to facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0039] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0040] It is understood that the term "embodiment" used throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, various embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is 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.

[0041] It is understood that in this application, "...when" and "if" both refer to the corresponding processing that will be carried out under certain objective circumstances, and are not limited to a specific time, nor do they require a judgment action to be performed during implementation, nor do they imply any other limitations.

[0042] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0043] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, unless otherwise specified or there is a logical conflict, the terminology and / or descriptions between different embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. The following descriptions of the embodiments of this application do not constitute a limitation on the scope of protection of this application.

[0044] To facilitate understanding, the relevant technologies of the embodiments of this application will be briefly introduced first.

[0045] I. System Information Block 1 (SIB1) Reception Process.

[0046] SIB1 carries information required for terminal equipment to access the cell, such as random access parameters and scheduling information for other System Information (SIs). SIB1 functions include providing cell selection information, cell access-related information, scheduling information for other System Information (OSIs), and common configurations for the serving cell. SIB1 is transmitted on the downlink shared channel (DL-SCH), which maps to the physical downlink shared channel (PDSCH), meaning SIB1 is transmitted via the PDSCH. The transmission period for SIB1 is typically 160ms, and the access network device can repeatedly transmit SIB1 within this 160ms. Based on existing protocols, the periodic transmission of SIB1 by the access network device results in significant power consumption.

[0047] The existing protocol's SIB1 acquisition process includes the following steps:

[0048] Step 1: The terminal device searches for the primary synchronization signal (PSS) and secondary synchronization signal (SSS) to perform a cell search and obtain the master information block (MIB). (It should be noted that in the NR system, the MIB is carried through the PBCH, and the PSS, SSS, and physical broadcast channel (PBCH) are bound together and collectively referred to as the SSB). The terminal device obtains the parameters required for SIB1 through the MIB. The parameters carried by the MIB are explained as follows:

[0049] The parameters of pdcch-ConfigSIB1 include:

[0050] The control resource set (CORESET) and the search space set will be described in detail in the following embodiments. The search space set is written as "search space set" and "search space" in different protocols, and is uniformly abbreviated as "SS set" in this embodiment.

[0051] The terminal device determines the timing of listening to the physical downlink control channel (PDCCH) of SIB1 based on the aforementioned parameters ControlResourceSetZero and SearchSpaceZero. Here, the PDCCH of SIB1 refers to the PDCCH corresponding to SIB1.

[0052] Step 2: The terminal device receives the PDCCH of SIB1 and the PDSCH according to the scheduling information of the PDCCH, wherein the PDSCH carries SIB1.

[0053] The terminal device determines the time-frequency domain position of the PDCCH of SIB1 based on the above parameters and listens to the PDCCH.

[0054] Since SIB1 is transmitted via PDSCH, in order to receive / decode SIB1, the scheduling information of PDSCH needs to be known. Therefore, the terminal device needs to listen to the PDCCH (i.e., the PDCCH of SIB1) that carries the scheduling information.

[0055] In this embodiment, the PDCCH of SIB1 is also called type0 PDCCH. The DCI carried by the PDCCH of SIB1 is scrambled with system information-radio network temporary identity (SI-RNTI), so it can also be called SI-RNTI scrambled DCI. The search resource set 0 (SS set 0) can also be called type0 PDCCH CSS (common search space) set (type0 PDCCH common search space set).

[0056] II. Listening timing for CORESET0, SS set0, and SIB1 PDCCH.

[0057] The control resource set (CORESET) refers to the time-frequency resource blocks used for transmitting PDCCH, which are located in the frequency domain. Each RB consists of 1 to 3 symbols in the time domain. The time-frequency resources of CORESET0 can be referenced in Tables 13-0 to 13-10, 13-1A, 13-4A, and 13-10A of TS38.213. The appropriate table can be used depending on the specific scenario. Table 1 below uses Table 13-0 as an example; CORESET0 can occupy 2 or 3 symbols in the time domain and 12 or 24 RBs in the frequency domain. The parameter ControlResourceSetZero indicates the index. Based on the table and the index, the specific number of time-frequency resources used by CORESET0 can be determined. For example, if ControlResourceSetZero indicates index 0, then CORESET0 consists of 2 symbols and 12 RBs. Based on these tables and the index indicated by ControlResourceSetZero, the multiplexing method between CORESET0 and SSB (second column of the table) and the frequency domain offset of CORESET0 relative to SSB can also be determined (last column of the table).

[0058] Table 1

[0059] There are three multiplexing patterns between SSB and CORESET0 (SS / PBCH block and CORESET multiplexing pattern), as shown in Figure 1. In pattern 1, SSB and CORESET0 are time-division multiplexed, while in patterns 2 and 3, SSB and CORESET0 are frequency-division multiplexed. (It should be noted that SSB and CORESET0 are time-division multiplexed in Table 1 above).

[0060] In this embodiment, CORESET defines the size of the time-frequency resource block carrying the PDCCH. The specific time-domain symbols on which CORESET needs to be searched for are determined by the search space set. Search resource set 0 (SS set 0) is used to determine the listening timing of type 0 PDCCH (i.e., SIB1's PDCCH) (which can also be understood as determining the time-domain location of CORESET0). Protocol 38.213 Tables 13-11 to 13-15A define search resource set 0 (SS set 0). Different tables can be used depending on the scenario; Table 2 below is only an example. The access network device and the terminal device can calculate the time-domain location of CORESET0 based on the parameters in Table 2. The following description uses the multiplexing mode of SSB and CORESET0 as mode 1 as an example.

[0061] When the multiplexing mode of SSB and CORESET0 is Mode 1 (time division between SSB and CORESET0), the terminal device listens for PDCCH on both slots. Taking a subcarrier spacing of 15kHz as an example, the terminal device listens for type 0 PDCCH on the time slot, and the terminal device determines the listening timing of type 0 PDCCH (time domain position of CORESET0) as follows:

[0062] The terminal device determines the SSB index. For SSB index i, the terminal device determines slot n0. Where μ is the parameter of the subcarrier (the subcarrier spacing is 15*2). μ (kHz), This represents the number of time slots contained in a frame within the subcarrier interval corresponding to μ. O and M are determined by Tables 13-11 to 13-15A of Protocol 38.213, and mod indicates modulo calculation. Taking the table below as an example, O and M are shown in the table. The parameter SearchSpaceZero indicates the index. Based on the table of SS set0 (below) and the index indicated by SearchSpaceZero, the parameters O and M can be determined, and thus slot n0 can be calculated.

[0063] Among them, if The frame containing time slot n0 satisfies SFN c mod2 = 0, where SFN C This is the system frame number.

[0064] Among them, if The frame containing time slot n0 satisfies SFN c mod2 = 1.

[0065] The above formula determines the time slot of type0 PDCCH. The terminal device also needs to determine which symbols of the time slot the type0 PDCCH is on. Taking Table 2 below as an example, the First symbol index indicates the position of the first symbol of CORESET0 in the two time slots (slot n0, n0+1 obtained by the above formula).

[0066] Table 2

[0067] Taking SCS = 15kHz (μ = 0) and the multiplexing mode of SSB and COREST0 as mode 1 as an example, based on the above calculation method, the time domain position of PDCCH of SIB1 (the position of CORESET 0) can be as follows: CORESET0 corresponding to SSB0 is located in slot 0 and slot 1, CORESET0 corresponding to SSB1 is located in slot 1 and slot 2, CORESET0 corresponding to SSB2 is located in slot 2 and slot 3, and CORESET0 corresponding to SSB3 is located in slot 3 and slot 4.

[0068] According to the SSB index, the terminal device listens to type0 PDCCH at some of the PDCCH listening times shown in Figure 2.

[0069] 3. On-demand SIB1.

[0070] Figure 3 is a schematic diagram of the OD SIB1 scenario provided in the embodiments of this application. To reduce SIB1 transmission and thus save network power consumption, OD SIB1 is proposed. One triggering method for OD SIB1 is through uplink signal triggering, i.e., the terminal device sends an uplink signal to trigger (or request) the access network device to send SIB1. As shown in Figure 3, there are three scenarios for OD-SIB1. Cell A is a cell that can periodically send SIB1, and cell B is a cell that does not periodically send SIB1, but cell B can send OD SIB1. In different scenarios, cell A and / or cell B are the cells where the terminal device is located.

[0071] In the three scenarios shown in Figure 3, the wake-up signal is used to trigger the access network device to send OD SIB1. The wake-up signal configuration is used to configure the parameters required for the terminal device to send the wake-up signal, and / or to configure the parameters required for the terminal device to receive OD SIB1. It should be noted that in Figure 3, the OD SIB1 configuration information is the same as the wake-up signal configuration mentioned above.

[0072] For scenario one: The access network device of cell B sends OD SIB1 configuration information to the terminal device; the terminal device sends a wake-up signal to the access network device of cell B in cell B; the access network device of cell B sends OD SIB1 in cell B.

[0073] For scenario two: the access network device of cell A sends configuration information of OD SIB1 to the terminal device; the terminal device sends a wake-up signal from cell BB to the access network device of cell B; the access network device of cell B sends OD SIB1 in cell B.

[0074] For scenario 3: The access network device of cell A sends configuration information of OD SIB1 to the terminal device; the terminal device sends a wake-up signal to the access network device of cell A in cell A; the access network device of cell A sends OD SIB1 in cell A, where OD SIB1 is a system message of cell B.

[0075] A terminal device requesting OD SIB1 (i.e., the terminal device sending a wake-up signal) can have two purposes:

[0076] First, the terminal device will reside in cell B.

[0077] Second, the terminal device will initiate a random access procedure on cell B to establish an RRC connection state.

[0078] When the terminal device is camped on the cell, the UE will perform at least one of the following actions:

[0079] First, receive the paging channel.

[0080] Second, receive DCI scrambled by paging (P-RNTI (paging-RNTI)).

[0081] Third, receive system messages.

[0082] Fourth, perform cell reselection-related operations, such as cell reselection-related measurements and assessments.

[0083] When a terminal device wishes to establish an RRC connection state, it will initiate a random access procedure.

[0084] IV. NR Random Access Procedure.

[0085] NR's random access procedures include contention-based random access (CBRA) and contention-free random access (CFRA). Random access procedures can also be divided into 4-step random access and 2-step random access. Figure 4 is a schematic diagram of contention-based / contention-free random access and 4-step / 2-step random access provided in an embodiment of this application.

[0086] As shown in Figure 4, for CBRA, the terminal device actively initiates random access. Taking the 4-step random access (A in Figure 4) as an example:

[0087] 1. MSG1: The terminal device selects and sends a preamble based on the parameters configured by the higher layer.

[0088] Each cell has 64 available preamble sequences. The terminal device selects one of them to send on the Physical Random-access Channel (PRACH) occasion. These sequences can be divided into two parts: one part is used for CBRA and CFRA, and the other part is used for other purposes (e.g., SI requests).

[0089] 2. MSG2: After receiving the preamble from the terminal device, the access network device sends the PDCCH and RAR of the Random Access Response (RAR). The terminal device receives the PDCCH of the RAR within the RAR window, and further receives the RAR according to the scheduling information of the PDCCH of the RAR.

[0090] During the aforementioned random access process, after the terminal device sends MSG1 or MSG A, it receives the PDCCH (i.e., RA-RNTI scrambled PDCCH, RAR PDCCH) of MSG 2 (4-step random access) or MSG B (2-step random access) within a certain time period. This time period can be called the RAR window. Among them, the PDSCH scheduled by the RA-RNTI scrambled PDCCH is used to carry RAR.

[0091] For 4-step random access, the start time of the RAR window can be: at least one symbol after the last symbol of the last PRACH occasion for transmitting PRACH, and the first symbol of the earliest CORESET for listening to type 1 PDCCH.

[0092] The length of the RAR window is configured through high-level parameters.

[0093] For 2-step random access, the RAR window starts at the first symbol of the earliest CORESET used to listen to type 1 PDCCH, at least one symbol after the last symbol of the PUSCH occasion of MSG A.

[0094] The length of the RAR window is configured through high-level parameters.

[0095] 3. MSG3: Based on the scheduling information carried in the RAR, the terminal device sends necessary information to the access network device via PUSCH. The information in MSG3 includes the terminal device identifier (C-RNTI or core network terminal device identifier).

[0096] 4. MSG4: If the terminal has already been assigned a C-RNTI before MSG4, contention resolution is achieved by the access network device scheduling the terminal device using a PDCCH scrambled with the C-RNTI. If the terminal device has not yet been assigned a C-RNTI before MSG4, contention resolution is achieved by the access network device scheduling the terminal device using a PDCCH scrambled with the TC-RNTI. The scheduled PDCCH contains a conflict resolution message, and correspondingly, the terminal device can use the TC-RNTI as its C-RNTI.

[0097] MSG3 and MSG4 are used for conflict resolution and RRC connection establishment.

[0098] The above process is based on a complete random access procedure. For CBRA, MSG2 / 3 / 4 may not occur, indicating that the random access has failed.

[0099] It should be noted that CFRA is triggered by the access network device to initiate random access by the terminal device, as shown in C in Figure 4. The access network device will first allocate a preamble to the terminal device. Therefore, CFRA does not need to resolve the conflict issue, thus eliminating steps 3 and 4.

[0100] 5. SSB pattern.

[0101] Figure 5 is a schematic diagram of the NR SSB pattern provided in the embodiments of this application. As shown in Figure 5, the NR protocol specifies multiple SSB patterns, that is, it specifies the temporal location of SSBs under different scenarios (frequency band, subcarrier spacing). An SSB burst contains multiple SSBs, which are distributed within half a frame (5ms). Taking a subcarrier spacing of 15kHz as an example, the SSB pattern is as follows. Taking Lmax=4 as an example, there are a maximum of 4 SSBs (index 0~3) within half a frame, and they are distributed in the first two subframes.

[0102] Within a half-frame, there is a one-to-one correspondence between SSBs and beams. By determining the index of the optimal SSB, the optimal beam direction can be found. In the NR protocol, for frequency bands below 3 GHz, there are a maximum of 4 SSBs and 4 beams scanned within a half-frame; for frequency bands from 3 GHz to 6 GHz, there are a maximum of 8 SSBs and 8 beams scanned within a half-frame; and for frequency bands above 6 GHz, there are a maximum of 64 SSBs and 64 beams scanned within a half-frame.

[0103] In this application, both the PRACH occasion (RO) and the listening occasion of type 0 PDCCH correspond to SSBs. The correspondence between the listening occasion of type 0 PDCCH and SSBs can be found in the descriptions of the relevant technologies mentioned above, and will not be repeated here. The correspondence between PRACH occasion and SSB can be one-to-many (one RO associated with multiple SSBs), one-to-one (one RO corresponds to one SSB), or many-to-one (multiple ROs correspond to one SSB). Figure 6 is a schematic diagram of the correspondence between PRACH occasion and SSB provided in this application embodiment. As shown in Figure 6, the terminal device needs to determine the RO based on the selected SSB to send PRACH. In this application embodiment, the correspondence between PRACH occasion and SSB can also be referred to as the mapping relationship between SSB and PRACH.

[0104] In this embodiment, to ensure that each SSB can be associated with at least one valid RO, and to avoid situations where there are remaining ROs without any SSBs to associate with after each SSB has been associated with at least one valid RO, NR proposes the concept of an association period. An association period is a multiple of the PRACH configuration period. An association period starts from system frame 0, and its duration, as shown in Table 3, is an integer multiple of the PRACH configuration period, with a maximum of 510ms. The specific integer value of this multiple is determined by the following condition: for a specific PRACH configuration period, if its corresponding association period can take multiple values, the smallest value that satisfies the condition that each SSB can be mapped to at least one PRACH occasion is selected.

[0105] Table 3

[0106] Figure 7 is a schematic diagram of an example of a communication system provided in an embodiment of this application. As shown in Figure 7, the communication system includes a first access network device and a first terminal device.

[0107] The first access network device is used to send first configuration information and / or second configuration information to the first terminal device; the first terminal device is used to receive the first configuration information and / or second configuration information from the first access network device, and to complete the reception of the first SIB1 and / or the reception of the first SSB according to the first configuration information and / or the second configuration information.

[0108] The first configuration information includes the uplink and downlink configuration information of the first cell where the first terminal device is located, and / or the configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell.

[0109] The first configuration information is indicated by a first SIB message, which is not an SIB1 message; the second configuration information is indicated by a second SIB message, which is also not an SIB1 message.

[0110] Figure 8 is a schematic diagram of another example of a communication system provided in an embodiment of this application. As shown in Figure 8, the communication system includes a first access network device, a first terminal device, and a second access network device.

[0111] The first access network device is used to send first configuration information and / or second configuration information to the first terminal device; the first terminal device is used to receive the first configuration information and / or second configuration information from the first access network device and complete the reception of the first SIB1 and / or the reception of the first SSB according to the first configuration information and / or second configuration information.

[0112] The first configuration information includes the uplink and downlink configuration information of the first cell where the first terminal device is located, and / or the configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell.

[0113] The first configuration information is indicated by a first SIB message, which is not an SIB1 message; the second configuration information is indicated by a second SIB message, which is also not an SIB1 message.

[0114] The second access network device is used to serve the first cell where the first terminal device is located.

[0115] In this embodiment of the application, uplink and downlink configuration information is used to determine the transmission direction of symbols. Symbols with different transmission directions include at least one of uplink symbols, downlink symbols, and flexible symbols. Uplink and downlink configuration information may also be referred to as time slot format or other names.

[0116] Optionally, the communication system may also include a second terminal device.

[0117] Optionally, the first terminal device (optionally the second terminal device) involved in this application may be user equipment (UE), access terminal, terminal unit, user station, terminal station, mobile station, mobile station, remote station, remote terminal, user terminal equipment (TE), mobile device, wireless communication device, terminal agent, tablet computer, handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, vehicle-mounted communication module, wearable device, or terminal device in a 5G network or a public land mobile network (PLMN) evolved after 5G. The access terminal may be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, drone, robot, point of sale (POS) machine, customer-premises equipment (CPE) or wearable device, virtual reality (VR) device. Wireless terminals can be categorized into various types, including VR (Augmented Reality) terminal devices, wireless terminals in industrial control, self-driving, remote medical, smart grid, transportation safety, smart city, and smart home. Alternatively, a terminal can be a communication-enabled terminal within the Internet of Things (IoT), such as a V2X terminal (e.g., vehicle-to-everything (V2X) terminal, a D2D communication terminal, or an M2M communication terminal. Terminals can be mobile or fixed. Furthermore, this application does not limit the device form of the terminal; the apparatus used to implement the terminal device's function can be the terminal device itself, or it can be an apparatus capable of supporting the terminal device in implementing that function, such as a chip system. This apparatus can be installed in the terminal device or used in conjunction with the terminal device. In this application, the chip system can consist of chips or include chips and other discrete components.

[0118] Optionally, the access network equipment involved in this application (e.g., the first access network equipment, the second access network equipment) can be an evolved base station (NodeB or eNB or e-NodeB) in a long term evolution (LTE) system or an enhanced LTE (LTE-A) system, such as a traditional macro base station eNB and a micro base station eNB in ​​a heterogeneous network scenario. Alternatively, it can include a next-generation node B (gNB) in a new radio (NR) system. Alternatively, it can include a transmission reception point (TRP), a home base station (e.g., a home evolved NodeB, or a home Node B, HNB), a base band unit (BBU), a base band pool (BBU pool), or a wireless fidelity (WiFi) access point (AP), etc. Alternatively, it can include base stations in non-terrestrial networks (NTNs), i.e., those deployed on flying platforms or satellites. In NTNs, access network devices can act as Layer 1 (L1) relays, base stations, or integrated access and backhaul (IAB) nodes. Alternatively, access network devices can be devices that implement base station functions in IoT, such as those implementing base station functions in drone communication, V2X, D2D, or machine-to-machine (M2M) communication.

[0119] In some possible scenarios, access network equipment can also be modules or units capable of implementing some of the functions of a base station. For example, access network equipment can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), 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).

[0120] 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, an access network device can be a network device or a module of a network device in an Open Radio Access Network (ORAN) system. In an ORAN system, CU can also be called open (O)-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 a software module, a hardware module, or a combination of a software module and a hardware module.

[0121] Optionally, the base station in the embodiments of this application may include various forms of base stations, such as: macro base station, micro base station (also known as small station), relay station, access point, home base station, TRP, transmitting point (TP), mobile switching center, etc., and the embodiments of this application do not specifically limit them.

[0122] The functions of the access network equipment (first access network equipment, second access network equipment) and the first terminal equipment (optionally, the second terminal equipment) involved in this application can be implemented by the communication device 900 in FIG. 9. FIG. 9 is a schematic diagram of the structure of the communication device 900 provided in an embodiment of this application. The communication device 900 includes one or more processors 901, a communication line 902, and at least one communication interface (FIG. 9 is only an example illustrating the inclusion of a communication interface 904 and a processor 901), and optionally may also include a memory 903.

[0123] The processor 901 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0124] Communication line 902 may include a path for connecting different components.

[0125] The communication interface 904 can be a transceiver module used to communicate with other devices or communication networks, such as Ethernet, RAN, and wireless local area networks (WLAN). For example, the transceiver module can be a transceiver or similar device. Optionally, the communication interface 904 can also be a transceiver circuit located within the processor 901, used to implement the processor's signal input and signal output.

[0126] The memory 903 can be a device with storage functionality. For example, it can be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions; random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions; electrically erasable programmable read-only memory (EEPROM); compact disc read-only memory (CD-ROM) or other optical disc storage; optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.); magnetic disk storage media or other magnetic storage devices; or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory can exist independently and be connected to the processor via communication line 902. The memory can also be integrated with the processor.

[0127] The memory 903 stores computer execution instructions for implementing the scheme of this application, and its execution is controlled by the processor 901. The processor 901 executes the computer execution instructions stored in the memory 903, thereby implementing the communication method provided in the embodiments of this application.

[0128] Alternatively, in this embodiment, the processor 901 may execute the processing-related functions in the communication method provided in the following embodiments of this application, and the communication interface 904 may be responsible for communicating with other devices or communication networks. This embodiment does not specifically limit this.

[0129] Optionally, the computer execution instructions in the embodiments of this application may also be referred to as application code, and the embodiments of this application do not specifically limit this.

[0130] In a specific implementation, as one example, processor 901 may include one or more CPUs, such as CPU0 and CPU1 in FIG9.

[0131] In a specific implementation, as one embodiment, the communication device 900 may include multiple processors, such as processors 907 and 901 in FIG. 9. Each of these processors may be a single-core processor or a multi-core processor. The processors here may include, but are not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, etc., and various computing devices that run software. Each computing device may include one or more cores for executing software instructions to perform calculations or processing.

[0132] In a specific implementation, as one embodiment, the communication device 900 may further include an output device 905 and an input device 906. The output device 905 communicates with the processor 901 and can display information in various ways. For example, the output device 905 may be a liquid crystal display (LCD), a light-emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 906 communicates with the processor 901 and can receive user input in various ways. For example, the input device 906 may be a mouse, keyboard, touchscreen device, or sensing device, etc.

[0133] The aforementioned communication device 900 may sometimes be referred to as a communication device, which can be a general-purpose device or a special-purpose device. For example, the communication device 900 may be a desktop computer, a portable computer, a web server, a handheld computer (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a device with a similar structure to that shown in Figure 9. The embodiments of this application do not limit the type of communication device 900.

[0134] Furthermore, the composition shown in Figure 9 does not constitute a limitation on the communication device. In addition to the components shown in Figure 9, the communication device may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0135] The communication method provided in the embodiments of this application will now be described with reference to the communication system shown in Figure 7 or Figure 8.

[0136] It should be noted that in the following embodiments of this application, the message names, parameter names, or information names between network elements are just examples. Other names may also be used in other embodiments. The communication method provided in this application does not specifically limit these names.

[0137] It is understood that in the embodiments of this application, each network element can execute some or all of the steps in the embodiments of this application. These steps or operations are merely examples, and the embodiments of this application can also perform other operations or variations of various operations. Furthermore, the steps can be executed in different orders as presented in the embodiments of this application, and it is not necessary to execute all the operations in the embodiments of this application.

[0138] Figure 10 is a schematic diagram of an example of the communication method provided in this application embodiment. This method can be applied to the communication system shown in Figure 8, where a first access network device serves a second cell, a second access network device serves a first cell, and a first terminal device is a terminal device under the first cell. This method is illustrated using the interaction between the first access network device, the second access network device, and the first terminal device (optionally, the second terminal device) as an example. Of course, the entity executing the action of the first access network device in this method can also be a device / module in the first access network device, such as a chip, processor, or processing unit in the first access network device; the entity executing the action of the second access network device in this method can also be a device / module in the second access network device, such as a chip, processor, or processing unit in the second access network device; the entity executing the action of the first terminal device in this method can also be a device / module in the first terminal device, such as a chip, processor, or processing unit in the first terminal device; the entity executing the action of the second terminal device in this method can also be a device / module in the second terminal device, such as a chip, processor, or processing unit in the second terminal device. This application embodiment does not specifically limit this in any way. In this application embodiment, the processing performed by a single execution entity (e.g., a first access network device, or a second access network device) can also be divided into multiple execution entities, which can be logically and / or physically separated. For example, as shown in FIG10, taking the interaction between a first access network device, a second access network device, and a first terminal device (optionally, a second terminal device) as an example, the communication method 1000 provided in this application embodiment includes the following steps:

[0139] S1010, the first access network device sends first configuration information and / or second configuration information to the first terminal device. Correspondingly, the first terminal device receives the first configuration information and / or second configuration information from the first access network device.

[0140] It should be noted that this method can be adapted to scenarios two and three in related technology three, that is, the first access network device serving the second cell sends first configuration information and / or second configuration information to the first terminal device in the first cell served by the second access network device. The first access network device and the second access network device can share a base station or not share a base station.

[0141] In this embodiment of the application, the first configuration information includes one or more of the following: uplink and downlink configuration information of the first cell where the first terminal device is located, or configuration information of the search space set of the PDCCH of the RAR of the first cell.

[0142] The RAR is used by the first terminal device to receive an acknowledgment message after sending a signal requesting the first SIB1.

[0143] In this embodiment of the application, the second configuration information is used to indicate the SSB configuration information of the first cell.

[0144] In one possible implementation, the first configuration information can be indicated by a first SIB message, which is a non-SIB1 message, such as an OSI message or other messages. This embodiment of the application does not limit this. Of course, the first configuration information can also be indicated by other messages, and this embodiment of the application does not limit this either.

[0145] In one possible implementation, the second configuration information can be indicated by a second SIB message, which is a non-SIB1 message. For example, it can be an OSI message, or other messages; this embodiment does not limit this. Of course, the second configuration information can also be indicated by other messages; this embodiment does not limit this either.

[0146] In this embodiment, the configuration information of the search space set of the PDCCH of the RAR in the first cell may include a PDCCH listening pattern, which indicates the time slots for listening to the PDCCH within a set of time slots. The first terminal device listens to the PDCCH of the RAR in the corresponding time slot according to the PDCCH listening pattern.

[0147] In one possible implementation, the configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on at most one time slot in a set of time slots.

[0148] Optionally, the first parameter is a first sequence, which includes at most one bit value "1". That is, the bit value "1" is used to indicate the time slot for the terminal device to listen to the PDCCH.

[0149] For example, the first parameter can be a bitmap, where each bit in the bitmap corresponds to a time slot. The first terminal device can listen to the PDCCH on at most one time slot in a set of time slots. For instance, if the first sequence is 1000 and each bit corresponds to a time slot, then the terminal device listens to the PDCCH in the first time slot out of four time slots.

[0150] Alternatively, as an example, the first sequence may include at most one bit value "0", that is, the bit value "0" is used to indicate the time slot in which the first terminal device listens to the PDCCH. For example, if the first sequence is 0111, then the first terminal device listens to the PDCCH in the first of the four time slots.

[0151] In another possible implementation, the configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots.

[0152] Optionally, the first parameter is a first sequence, which includes one or more bit values ​​"1". That is, the bit value "1" is used to indicate the time slot of the first terminal device listening to the PDCCH.

[0153] For example, the first parameter can be a bitmap, where each bit corresponds to a time slot. For instance, the first terminal device listens to the PDCCH on multiple time slots within a set of time slots. One or more bit values ​​"1" can be consecutive or non-consecutive, meaning the first terminal device can listen to the PDCCH on multiple consecutive or non-consecutive time slots within a set of time slots.

[0154] The method for indicating that the first terminal device listens to the PDCCH of multiple time slots in a set of time slots with a bit value of "0" can be referred to the above description, and will not be repeated here in the embodiments of this application.

[0155] Alternatively, the first parameter may also instruct the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots in other forms, which is not limited in this application embodiment.

[0156] It should be noted that the above-described method of indicating the configuration information of the search space set of the RAR's PDCCH through the first configuration information can form a separate embodiment.

[0157] In this application embodiment, the following signaling methods can indicate uplink and downlink configuration information:

[0158] SIB1 messages, such as the tdd-UL-DL-ConfigurationCommon message within an SIB1 message, can indicate uplink and downlink configuration information. SIB1 messages can be the first SIB1 or other types of SIB1 messages.

[0159] RRC signaling, for example, the tdd-UL-DL-ConfigurationDedicated message in RRC signaling can indicate uplink and downlink configuration information.

[0160] DCI signaling, for example, the slot format indication (SFI) in DCI signaling indicates uplink and downlink configuration information.

[0161] Alternatively, the aforementioned first SIB message. It should be noted that this first SIB message can be a newly added message or a newly added parameter. The first SIB message includes the uplink and downlink configuration information of the first cell.

[0162] In one possible implementation, the priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is lower than the priority of the uplink / downlink configuration information indicated by the first message. The first message includes an SIB1 message, RRC signaling, or DCI signaling. For example, the priority of tdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationDedicated, or SFI is higher than the priority of the uplink / downlink configuration information indicated by the first SIB message.

[0163] Optionally, the first configuration information also includes information for determining the listening timing of the PDCCH of the first cell (e.g., the PDCCH of the first SIB1), that is, the first configuration information is also used to determine the symbol position of the PDCCH (e.g., the PDCCH of the first SIB1). The uplink / downlink configuration information indicated by the first message can cover or modify the transmission direction of the symbol of the PDCCH (e.g., the PDCCH of the first SIB1). That is, the uplink / downlink configuration information indicated by the first message can indicate that the symbol of the listening timing is at least one of uplink symbol, downlink symbol, or flexible symbol. This is because the PDCCH is a downlink channel, and the symbol where the PDCCH listening timing is located is considered a downlink symbol. The uplink / downlink configuration information indicated by the first message has a higher priority than the uplink / downlink configuration information indicated by the first SIB message, and the uplink / downlink configuration information indicated by the first message covers or modifies the transmission direction of the symbol where the PDCCH (e.g., the PDCCH of the first SIB1) is located.

[0164] For example, the uplink / downlink configuration information indicated by SIB1 or RRC signaling, or the uplink / downlink configuration information indicated by DCI (e.g., DCI format 2_0), can override or modify the transmission direction of the symbol containing the listening slot of the PDCCH configured in the first SIB message (e.g., the PDCCH of the first SIB1). That is, when indicating the uplink / downlink configuration information, SIB1, RRC, or DCI can indicate these symbol positions as uplink symbols. When a symbol is indicated as an uplink symbol, the terminal device does not need to listen to the PDCCH of the first cell on that symbol.

[0165] Optionally, the first SIB message includes uplink / downlink configuration information, and the uplink / downlink configuration information indicated by the first message can override or modify the uplink / downlink configuration information indicated by the first SIB message. For one or more symbols, the uplink / downlink configuration information indicated by the first message and the uplink / downlink configuration information indicated by the first SIB message can be the same as or different, that is, the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first message can be the same as or different from the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first SIB message. The symbol transmission direction includes uplink symbols, downlink symbols, or flexible symbols.

[0166] For example, the uplink / downlink configuration information indicated by SIB1 / RRC / DCI can override or modify the uplink / downlink configuration information configured in the first SIB message. For instance, for a certain symbol, the first SIB message configures it as an uplink symbol. After the first terminal device receives SIB1 / RRC / DCI, the time slot format indicated by SIB1 / RRC / DCI can change the symbol to a downlink symbol. Similarly, a downlink symbol can also be changed to an uplink symbol.

[0167] Optionally, the uplink / downlink configuration information indicated by the first SIB message cannot overwrite or modify the uplink / downlink configuration information indicated by the first message. For one or more symbols, the uplink / downlink configuration information indicated by the first SIB message should be the same as the uplink / downlink configuration information indicated by the first message, that is, the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first SIB message should be the same as the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first message. The symbol transmission direction includes at least one of uplink symbols and downlink symbols.

[0168] In another possible implementation, the uplink / downlink configuration information of the first cell indicated by the first configuration information has a higher priority than the uplink / downlink configuration information indicated by the first message. For example, the priority of tdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationDedicated, or SFI is lower than the priority of the uplink / downlink configuration information indicated by the first SIB message.

[0169] Optionally, the first configuration information also includes information for determining the listening timing of the PDCCH (e.g., the PDCCH of the first SIB1) of the first cell, that is, the first configuration information is also used to determine the symbol position of the PDCCH (e.g., the PDCCH of the first SIB1). The uplink / downlink configuration information indicated by the first message cannot cover or modify the transmission direction of the PDCCH (e.g., the PDCCH of the first SIB1) symbol. Specifically, the uplink / downlink configuration information indicated by the first message can indicate that the symbol for the listening timing is a downlink symbol, or at least a flexible symbol. This is because the PDCCH is a downlink channel, and the symbol where the PDCCH listening timing is located is considered a downlink symbol. The priority of the uplink / downlink configuration information indicated by the first message is lower than that of the uplink / downlink configuration information indicated by the first SIB message, and the uplink / downlink configuration information indicated by the first message cannot cover or modify the transmission direction of the symbol where the PDCCH (e.g., the PDCCH of the first SIB1) is located. Wherein, if the PDCCH listening timing is located on a flexible symbol, the first terminal device can listen to the PDCCH on the flexible symbol.

[0170] For example, the uplink / downlink configuration information configured by SIB1 or RRC signaling, or the uplink / downlink configuration information indicated by DCI (e.g., DCI format 2_0), cannot overwrite or modify the transmission direction of the symbol where the PDCCH listening time is located in the first SIB message configuration. That is, when SIB1, RRC, or DCI indicates the uplink / downlink configuration information, these symbol positions cannot be indicated as uplink symbols. In other words, when SIB1 / RRC / DCI indicates the uplink / downlink configuration information, the transmission direction of these symbols should be indicated as downlink symbols or at least one of flexible symbols.

[0171] Optionally, the first SIB message includes uplink / downlink configuration information. The uplink / downlink configuration information indicated by the first message cannot overwrite or modify the uplink / downlink configuration information indicated by the first SIB message. For one or more symbols, the uplink / downlink configuration information indicated by the first message must be the same as the uplink / downlink configuration information indicated by the first SIB message; that is, the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first message must be the same as the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first SIB message. The symbol transmission direction includes uplink symbols, downlink symbols, or flexible symbols.

[0172] Optionally, the uplink / downlink configuration information indicated by the first message can override or modify the transmission direction of the flexible symbol determined according to the uplink / downlink configuration information indicated by the first SIB message.

[0173] For example, the uplink / downlink configuration information indicated by SIB1 / RRC / DCI cannot overwrite or modify the uplink / downlink symbols configured in the first SIB message. For instance, if the first SIB message configures a symbol as an uplink symbol, and the first terminal device subsequently receives SIB1 / RRC / DCI, the uplink / downlink configuration information indicated by SIB1 / RRC / DCI cannot change that symbol to a downlink symbol. Similarly, a downlink symbol cannot be changed to an uplink symbol. That is, when SIB1 / RRC / DCI indicates a slot format, the transmission direction of these symbols should be consistent with the uplink or downlink direction indicated by the first SIB message. However, for flexible symbols indicated by the first SIB message, when SIB1 / RRC / DCI indicates uplink / downlink configuration information, the transmission direction of these symbols can be indicated as either uplink or downlink.

[0174] Optionally, the uplink / downlink configuration information indicated by the first SIB message can override or modify the uplink / downlink configuration information indicated by the first message. For one or more symbols, the uplink / downlink configuration information indicated by the first SIB message can be the same as or different from the uplink / downlink configuration information indicated by the first message; that is, the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first SIB message can be the same as or different from the symbol transmission direction determined by the uplink / downlink configuration information indicated by the first message. The symbol transmission direction includes at least one of uplink symbols and downlink symbols.

[0175] It should be noted that the two possible implementation methods described above can also be combined with each other, which will not be elaborated further in the embodiments of this application.

[0176] Alternatively, as a possible implementation, the first configuration information can be configured through a MIB message. When configuring the uplink and downlink configuration information of the first cell through a MIB message, the priority relationship between the first message and the first message can be referred to the above description, and will not be repeated here in the embodiments of this application.

[0177] Of course, the uplink and downlink configuration information of the first cell can also be configured in other ways, and this application embodiment does not limit this.

[0178] It should be noted that the methods for prioritizing the uplink and downlink configuration information of the first cell mentioned above can form an independent scheme.

[0179] In this embodiment of the application, the SIB1 type of the first cell may include one or more types, and different SIB1 types can be switched. For example, the SIB1 type of the first cell may include one or more of the following:

[0180] The first SIB1, i.e., the SIB1 sent on demand within the first cell.

[0181] The second SIB1 is the SIB1 that is periodically transmitted within the first cell.

[0182] No SIB1 means that SIB1 is stopped being transmitted in the first cell, or it can be understood as SIB1 not being transmitted in the first cell.

[0183] It should be noted that the first SIB1, or the SIB1 sent on demand, can be the OD-SIB1 described in the above-mentioned related technologies, or it can be other names. The embodiments of this application do not limit its name.

[0184] In one possible implementation, the configuration of the PDCCH of the first SIB1 is the same as that of the PDCCH of the second SIB1. That is, the PDCCH of the first SIB1 and the PDCCH of the second SIB1 share the same configuration.

[0185] The same configuration mentioned above includes one or more of the following: CORESET, or search space set.

[0186] For example, based on the same PDCCH configuration, the terminal device can listen to the PDCCH of SIB1 according to the state of SIB1. For instance, if the current state of SIB1 is First SIB1, then the first terminal device will listen to the PDCCH of First SIB1 for a period of time after sending the first wake-up signal to wake up First SIB1. As another example, if the current state of SIB1 is No SIB1, then the first terminal device does not need to listen to the PDCCH of SIB1. Yet another example, if the current state of SIB1 is Second SIB1, then the terminal device needs to periodically listen to the PDCCH of Second SIB1.

[0187] In another possible implementation, the configuration of the PDCCH of the first SIB1 is different from that of the PDCCH of the second SIB1. That is, the PDCCH of the first SIB1 and the PDCCH of the second SIB1 use different configurations.

[0188] The configuration of the PDCCH of the first SIB1 is different from that of the PDCCH of the second SIB1. Their respective configurations include one or more of the following: CORESET, or search space set.

[0189] For example, the two use different search space sets. The first terminal device listens to the PDCCH on different search space sets according to the state of SIB1. Alternatively, the first terminal device may not listen to either search space set (no state of SIB1).

[0190] It should be noted that the configuration parameters of the SSB of the first cell can be the same or different in the three SIB1 states, and this application embodiment does not limit this. For example, in the three SIB1 states, SSB-positionInBurst, ssb-periodicityServingCell, or ss-PBCH-BlockPower can be configured respectively.

[0191] In this embodiment of the application, when there are multiple types of SIB1 in the first cell, switching can be performed between different types of SIB1.

[0192] In one possible implementation, the third SSB of the first cell can be used to indicate the SIB1 state type of the first cell during handover. Alternatively, in other words, the communication method provided in this application embodiment further includes:

[0193] The second access network device sends a third SSB to the first terminal device. Correspondingly, the first terminal device receives the third SSB from the second access network device.

[0194] It should be noted that the third SSB can be a periodically sent SSB.

[0195] In this embodiment of the application, the third SSB is used to indicate the SIB1 state type of the handover of the first cell. The third SSB includes a MIB message.

[0196] Optionally, the PDCCH configuration parameters in the MIB message indicate that the SIB1 message is used to indicate the SIB1 status type for handing over the first cell.

[0197] For example, the PDCCH configuration parameter in the MIB can be PDCCH-ConfigSIB1.

[0198] For example, some bits in PDCCH-ConfigSIB1 in the MIB can be used to indicate a SIB1 state type: no SIB1, or, first SIB1, or, second SIB1.

[0199] For example, the reserved bit values ​​in PDCCH-ConfigSIB1 can also be used to indicate the SIB1 status type. For instance, the SIB1 status type can be indicated by the index reserved in ControlResourceSetZero and / or the index reserved in SearchSpaceZero.

[0200] Optionally, the ssb subcarrier offset parameter in the MIB message is used to indicate the SIB1 state type for switching the second cell.

[0201] For example, the ssb subcarrier offset parameter can be ssb-SubcarrierOffset, which is used to indicate k_ssb, and the SIB1 state type is determined by k_ssb.

[0202] For example, when k_ssb is the first value, it indicates that the SIB1 state type is the second SIB1. As another example, when k_ssb is the second value, it indicates that the SIB1 state type is the first SIB1. And as yet another example, when k_ssb is the third value, it indicates that the SIB1 state type is no SIB1.

[0203] Where 0 <= first value <= 23 (in FR1), or 0 <= first value <= 11 (in FR2), 23 < first value <= x1 (in FR1), or 11 < first value <= y1 (in FR2), x1 < first value <= x2 (in FR1), or y1 < first value <= y2 (in FR2).

[0204] Alternatively, the switching of the search space set can be indicated to determine the state of SIB1. For example, if the above indication method indicates that two search space sets are not monitored, it means that the SIB1 state type is "No SIB1". If the above indication method indicates that the first search space set is monitored, it means that the SIB1 state type is "First SIB1". If the above indication method indicates that the second search space set is monitored, it means that the SIB1 state type is "First SIB1".

[0205] In another possible implementation, the paging message of the first cell can be used to indicate a switch of the SIB1 state type of the first cell. Alternatively, in other words, the communication method provided in this application embodiment further includes:

[0206] The second access network device sends a first paging message to the first terminal device. Correspondingly, the first terminal device receives the first paging message from the second access network device.

[0207] Alternatively, other methods may be used to indicate the SIB1 status type of the first cell, which is not limited in this embodiment.

[0208] Following the paging message from the third SSB, or the first cell, the first terminal device listens to the PDCCH of SIB1 according to the switched SIB1 type.

[0209] It should be noted that the above methods for indicating the SIB1 status type of the first cell can form an independent scheme.

[0210] In this embodiment of the application, for the second cell served by the first access network device and the second terminal device in the second cell, SIB1 in the second cell may also have multiple state types.

[0211] In this embodiment of the application, the SIB1 status type of the second cell includes at least one of the following:

[0212] The third SIB1, namely the SIB1 sent on demand within the second cell.

[0213] The fourth SIB1 is the SIB1 that is periodically transmitted within the second cell.

[0214] Alternatively, there is no SIB1, meaning that SIB1 transmission stops in the second cell.

[0215] In this embodiment, the second terminal device may be a terminal device that does not support the third SIB1 or does not support the SIB1-free mode, meaning the second terminal device needs to receive periodically transmitted SIB1. One possible scenario is that, to save power, the second access network device switches the SIB1 state type to SIB1-free or the third SIB1. Therefore, in this case, the second terminal device needs to switch to another cell, such as the third cell, to receive periodically transmitted SIB1.

[0216] The first condition can be used for cell handover by a second terminal device that does not support the third SIB1 or has no SIB1.

[0217] In this embodiment of the application, the first condition includes one or more of the following:

[0218] In one possible implementation, the SSB subcarrier offset parameter indication value in the MIB message included in the second SSB of the second cell does not meet the first range. The second SSB and the third SSB can be the same SSB or different SSBs.

[0219] For example, referring to the description of the ssb subcarrier offset parameter indication value in the MIB message of the third SSB of the first cell, when the second terminal device detects that k_ssb does not meet the range corresponding to the first value, it is considered that the SIB1 status type of the second cell has changed to the third SIB1 or no SIB1, and then the second terminal device can perform cell handover.

[0220] In another possible implementation, the type of the second SSB changes from CD SSB to NCD SSB.

[0221] For example, if the type of the second SSB changes from CD SSB to NCD SSB (for example, if the second terminal device detects that the MIB indicates no CORESET0), then the second terminal device considers that the SIB1 status type of the second cell has changed to the third SIB1 or no SIB1, and thus the second terminal device can perform cell handover.

[0222] In another possible implementation, the configuration parameters of the second SSB are changed. The second terminal device can then assume that the SIB1 status type of the second cell has changed to the third SIB1 or that there is no SIB1, thus enabling the second terminal device to perform cell handover.

[0223] Alternatively, the paging message from the second cell indicates a switch to the third SIB1, or no SIB1.

[0224] It should be noted that the method of handover based on SIB1 status type in the second cell described above can also form an independent scheme.

[0225] In this embodiment, the first terminal device needs to confirm whether there is a broadcast SIB1 (e.g., an on-demand SIB1 triggered by another terminal device, or a periodic SIB1) before sending the first wake-up signal. If the second access network device is sending SIB1, the first terminal device does not need to send the first wake-up signal to request SIB1 from the second access network device, thereby saving uplink resource overhead and reducing system message latency. Specifically, the first wake-up signal is used to request the first SIB1 of the first cell, that is, the first wake-up signal is used to request the on-demand SIB1 of the first cell.

[0226] To achieve this effect, continuous listening to the SIB1 PDCCH by the first terminal device would increase its power consumption. Therefore, to save power, the first terminal device can listen to the SIB1 PDCCH for a period of time (the first time period) before sending the wake-up signal.

[0227] Optionally, in one possible implementation of this application embodiment, the first configuration information further includes the configuration of a first time period for the first terminal device to listen to the PDCCH of SIB1 before requesting the first SIB1 of the first cell.

[0228] Alternatively, the first configuration information and the configuration for the first time period may be carried by two different messages, which is not limited in this embodiment of the application.

[0229] Optionally, in another possible implementation of this application embodiment, the configuration of the first time period for the first terminal device to listen to the PDCCH of SIB1 before requesting the first SIB1 of the first cell is predefined.

[0230] In this embodiment of the application, the configuration of the first time period includes at least one of the following: the start time of the first time period, the length of the first time period, or the end time of the first time period.

[0231] The start time of the first time period includes the time domain offset of the start position of the first time period relative to the first reference point.

[0232] In this embodiment of the application, the first reference point includes one or more of the following: the timing of the transmission of the previous first wake-up signal before the first time period; the timing of the transmission of the next first wake-up signal after the first time period; the time of the last reception of SIB1 before the first time period; or, the time window of the previous first SIB1 before the first time period.

[0233] It should be noted that the first reference point can be predefined or indicated by the access network device (e.g., the first configuration information includes the configuration of the first time period, which may include the configuration of the first reference point).

[0234] The end time of the first time period includes a first time-domain offset of the end position of the first time period relative to the timing of the transmission of the next first wake-up signal after the first time period; wherein the first time-domain offset is greater than or equal to 0.

[0235] It should be noted that the methods related to the first time period can form an independent scheme.

[0236] In this embodiment of the application, the configuration information of the first SSB includes one or more of the following:

[0237] The SSB burst pattern is a parameter used to determine the temporal location of the SSB transmitted within an SSB burst. It should be noted that the second SSB message described above may contain one or more SSB patterns; for example, this parameter is similar to ssb-PositionsInBurst described in the related technologies.

[0238] The period of the SSB burst is a parameter used to determine the period of the SSB, i.e., the period of the SSB burst. It should be noted that the second SIB message mentioned above may contain one or more periods. For example, this parameter is similar to the ssb-periodicityServingCell described in the related technologies above.

[0239] The auxiliary synchronization signal SSS power is a parameter used to determine the power of the SSS, i.e., the average EPER of the SSS. Optionally, it should be noted that the second SIB message mentioned above may contain one or more power parameters; for example, this parameter is similar to ss-PBCH-BlockPower described in the related technologies above.

[0240] The subcarrier spacing of the SSB is a parameter used to determine the subcarrier spacing of the SSB. Optionally, it should be noted that the second SSB message described above may contain one or more subcarrier spacings. For example, this parameter is similar to ssbSubcarrierSpacing described in the related technologies above.

[0241] The system frame number (SFN) is used to indicate the SFN offset of the SSB during the SSB burst period. For example, this parameter is similar to the ssb-sfn-offset described in the related art above.

[0242] The SSB half-frame indicator is a parameter used to indicate whether the SSB is located in the first or second half of a frame.

[0243] The number of SSB bursts refers to the number of SSB bursts sent by the second access network device after the first terminal device requests the first SSB, or the number of SSB bursts sent by the second access network device after triggering the first SSB.

[0244] The frequency domain location of the SSB is configured in the second cell to determine the frequency domain location of the SSB in the first cell. It should be noted that the first terminal device does not need to search for the SSB on every synchronization grid in the first cell. This parameter allows the SSB of the first cell to be on or off a synchronization grid. Specifically, the method for configuring the first SSB of the first cell through the second cell can be found in the following embodiment.

[0245] The cell identifier ID corresponding to the SSB can be the same as the cell ID of the first SIB1. Alternatively, this parameter can be the default, meaning the cell ID of the first SIB1 can be used as the cell ID of the SSB.

[0246] The signal quality threshold of the SSB, i.e. the measurement threshold of the SSB, is used for beam selection of the second wake-up signal, which is used to request the first SSB.

[0247] Alternatively, the parameters of the second wake-up signal.

[0248] The parameters of the second wake-up signal include:

[0249] PRACH related parameters of the second wake-up signal: Prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, zeroCorrelationZoneConfig, preambleReceivedTargetPower, preambleTransMax, powerRampingStep, ra-ResponseWindow, s sb-perRACH-Occasion, sib1-RequestPeriod, ra-PreambleStartIndex, ra-AssociationPeriodIndex, ra-ssb-OccasionMaskIndex, prach-RootSequenceIndex, msg1-SubcarrierSpacing, restrictedSetConfig, etc.

[0250] The search space set of the RAR corresponding to the second wake-up signal.

[0251] It should be noted that the configuration information of the SSB of the first cell can be the configuration information of the first SSB of the first cell, that is, the configuration information of the on-demand SSB of the first cell.

[0252] It should be noted that the first SSB may or may not be on the synchronization grid, and this application embodiment does not limit this.

[0253] It should be noted that the above-mentioned solutions for the first SSB configuration can be combined into a single solution.

[0254] Furthermore, in this embodiment of the application, based on the configuration of the first SSB and the configuration of the first SIB1, the first terminal device can request the first SSB and the first SIB1.

[0255] In one possible implementation, the first wake-up signal and the second wake-up signal are different signals, that is, the first wake-up signal and the second wake-up signal are two independent signals.

[0256] Optionally, as shown in FIG11, the communication method provided in the embodiments of this application further includes:

[0257] S1110, the first terminal device sends a second wake-up signal to the first access network device in the second cell. Correspondingly, the first access network device receives the second wake-up signal from the first terminal device in the second cell.

[0258] That is, the first terminal device sends a signal to the first access network device in the second cell requesting the first SSB of the first cell.

[0259] S1120, the first terminal device determines the resources of the first wake-up signal according to the mapping relationship between the first SSB of the first cell and the PRACH of the first cell.

[0260] S1130, the first terminal device sends a first wake-up signal to the second access network device in the first cell. Correspondingly, the second access network device receives the first wake-up signal from the first terminal device in the first cell.

[0261] Specifically, after the first terminal device sends a second wake-up signal to the first access network device requesting the first SSB of the first cell, the second access network device sends the first SSB of the first cell. The first terminal device can receive the first SSB based on the configuration message of the first SSB, perform measurements, and select a beam. Further, the first terminal device can determine the resources for the first wake-up signal based on the PRACH mapping relationship between the first SSB and the first cell (first SSB and RO mapping rule). Then, the first terminal device sends the first wake-up signal on the first cell using the resources for the first wake-up signal. It should be noted that in this implementation, the resources for the first wake-up signal can be determined based on the first SSB and RO mapping rule on the first cell.

[0262] Optionally, for a first terminal device initially accessing the first cell, the resources for the second wake-up signal cannot be determined using the first SSB and RO mapping rule of the first cell (because the first terminal device has not yet performed measurements in the first cell). To solve this problem, the first terminal device needs to first determine the resources for the second wake-up signal.

[0263] As shown in Figure 12, the communication method provided in this application embodiment further includes:

[0264] S1210, the first terminal device determines the resources for the second wake-up signal.

[0265] If the first terminal device is the terminal device initially accessing the first cell, and the first terminal device has not yet performed measurements in the first cell, the resources for the second wake-up signal cannot be directly determined through the mapping relationship between the SSB and PRACH of the first cell. The first terminal device can determine the resources for the second wake-up signal through at least one of the following methods.

[0266] In one possible implementation, the access network device (e.g., a first access network device) indicates the resources for the second wake-up signal to the first terminal device. Correspondingly, the first terminal device receives indication information from the access network device (e.g., the first access network device) indicating the resources for the second wake-up signal.

[0267] For example, the resources for the second wake-up signal can be indicated through the configuration information of the first SIB1 or the configuration information of the first SSB, or they can be indicated in other ways.

[0268] In another possible implementation, the first terminal device determines the resources for the second wake-up signal based on the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

[0269] Specifically, the mapping relationship between the SSB of the second cell and the PRACH of the first cell can be predefined or configured by the first access network device. Alternatively, the mapping relationship between the SSB of the second cell and the PRACH of the first cell can be predefined to be the same as the mapping relationship between the SSB of the first cell and the PRACH of the first cell (i.e., the mapping relationship can be predefined to be the same). Then, the first terminal device performs SSB measurement on the second cell, selects a beam, and determines the resources for the second wake-up signal based on the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

[0270] S1220, the first terminal device sends a second wake-up signal to the second access network device in the first cell. Correspondingly, the second access network device receives the second wake-up signal from the first terminal device in the first cell.

[0271] That is, the first terminal device sends a signal to the second access network device in the first cell requesting the first SSB of the first cell.

[0272] S1230, the first terminal device sends a first wake-up signal to the second access network device in the first cell. Correspondingly, the second access network device receives the first wake-up signal from the first terminal device in the first cell.

[0273] In another possible implementation, the first wake-up signal and the second wake-up signal are the same signal, that is, the second wake-up signal and the first wake-up signal are the third wake-up signal.

[0274] Optionally, the communication method provided in this application embodiment further includes:

[0275] The first terminal device sends a third wake-up signal to the first access network device in the second cell. Correspondingly, the first access network device receives the third wake-up signal from the first terminal device in the second cell.

[0276] Alternatively, the first terminal device sends a third wake-up signal to the second access network device in the first cell. Correspondingly, the second access network device receives the third wake-up signal from the first terminal device in the first cell.

[0277] It should be noted that in this method, for the first terminal device that initially accesses the first cell, the resources of the third wake-up signal cannot be determined through the mapping relationship between the SSB and PRACH of the first cell (because the first terminal device has not yet performed measurements in the first cell). The terminal device can determine the resources of the third wake-up signal using the two methods in step S1210.

[0278] In another possible implementation, the communication method provided in this application embodiment further includes:

[0279] The second access network device sends an indication message to the first terminal device to trigger the transmission of the first SSB in the first cell. Correspondingly, the first terminal device receives the indication message from the second access network device to trigger the transmission of the first SSB in the first cell.

[0280] The indication information can be SSB or DCI signaling. Optionally, the DCI can be DCI format 1_0, such as DCI format 1_0 scrambled with P-RNTI, SI-RNTI or TC-RNTI. This application embodiment does not limit this.

[0281] Alternatively, this step can be replaced with:

[0282] The first access network device sends an indication message to the first terminal device to trigger the transmission of the first SSB in the first cell. Correspondingly, the first terminal device receives the indication message from the first access network device to trigger the transmission of the first SSB in the first cell.

[0283] For example, the first terminal device has already camped on the first cell, and the first terminal device has performed synchronization once on the first cell. Similar to the method described above, the indication information can be SSB or CDI. Optionally, the DCI can be DCI format 1_0, such as DCI format 1_0 scrambled with P-RNTI, SI-RNTI, or TC-RNTI. This application embodiment does not limit this.

[0284] S1020, the first terminal device completes the reception of the first SIB1 and / or the first SSB according to the first configuration information and / or the second configuration information.

[0285] It should be noted that the first wake-up signal, the second wake-up signal, and the third wake-up information involved in the embodiments of this application may also be called other names, and the embodiments of this application do not limit their names.

[0286] Figure 13 is a schematic diagram of another example of the communication method provided in this application embodiment. This method can be applied to the communication system shown in Figure 7, where the first access network device serves a first cell, and the first terminal device is a terminal device within the first cell. This method is illustrated using the interaction between the first access network device and the first terminal device as an example. Of course, the entity executing the action of the first access network device in this method can also be a device / module in the first access network device, such as a chip, processor, or processing unit in the first access network device; the entity executing the action of the first terminal device in this method can also be a device / module in the first terminal device, such as a chip, processor, or processing unit in the first terminal device. This application embodiment does not specifically limit this. In this application embodiment, the processing performed by a single executing entity (e.g., the first access network device) can also be divided into multiple executing entities, which can be logically and / or physically separated. For example, as shown in Figure 13, taking the interaction between the first access network device and the first terminal device as an example, the communication method 1300 provided in this application embodiment includes the following steps:

[0287] S1310, the first access network device sends first configuration information and / or second configuration information to the first terminal device. Correspondingly, the first terminal device receives the first configuration information and / or the second configuration information from the first access network device.

[0288] It should be noted that this method can be adapted to scenario one in related technology three, that is, the first access network device serving the first cell sends first configuration information and / or second configuration information to the first access network device in the first cell.

[0289] In this embodiment of the application, the first configuration information includes one or more of the following: uplink and downlink configuration information of the first cell where the first terminal device is located, or configuration information of the search space set of the PDCCH of the RAR of the first cell.

[0290] In this embodiment of the application, the second configuration information is used to indicate the SSB configuration information of the first cell.

[0291] In one possible implementation, the first configuration information can be indicated by a first SIB message, which is a non-SIB1 message, such as an OSI message or other messages. This embodiment of the application does not limit this. Of course, the first configuration information can also be indicated by other messages, and this embodiment of the application does not limit this either.

[0292] In one possible implementation, the second configuration information can be indicated by a second SIB message, which is a non-SIB1 message. For example, it can be an OSI message, or other messages; this embodiment does not limit this. Of course, the second configuration information can also be indicated by other messages; this embodiment does not limit this either.

[0293] S1320, the first terminal device completes the reception of the first SIB1 and / or the first SSB according to the first configuration information and / or the second configuration information.

[0294] In method 1300, the method of indicating the configuration information of the search space set of the RAR's PDCCH through the first configuration information can be referred to the relevant description in method 1000, and will not be repeated here.

[0295] In Method 1300, the relevant methods regarding the priority of uplink and downlink configuration information of the first cell can be found in the relevant description in Method 1000, and will not be repeated here.

[0296] In method 1300, the method for indicating the SIB1 status type of the first cell can be referred to the description in method 1000, and will not be repeated here.

[0297] In Method 1300, the relevant methods for the first time period can be found in the description in Method 1000, and will not be repeated here.

[0298] In method 1300, the relevant methods for configuring the first SSB of the first cell can be referred to the description in 1000, and will not be repeated here.

[0299] That is, in method 1300, due to the different system architecture of the application, the solution in method 1000 is not applicable to the system architecture shown in Figure 7. The solutions in method 1000 that are compatible with the system architecture shown in Figure 7 can all refer to the relevant descriptions in method 1000.

[0300] The above mainly describes the solutions provided by the embodiments of this application from the perspective of the interaction between the first access network device and the first terminal device (optionally, the second access network device; optionally, the second terminal device). Correspondingly, the embodiments of this application also provide a communication device for implementing the various methods described above. This communication device can be the first access network device in the above method embodiments, or a device containing the first access network device, or a component usable in the first access network device; or, the communication device can be the first terminal device in the above method embodiments, or a device containing the first terminal device, or a component usable in the first terminal device; or, the communication device can be the second access network device in the above method embodiments, or a device containing the second access network device, or a component usable in the second access network device; or, the communication device can be the second terminal device in the above method embodiments, or a device containing the second terminal device, or a component usable in the second terminal device. It is understood that, in order to achieve the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented through hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described function for each specific application, but such implementation should not be considered beyond the scope of this application.

[0301] For example, Figure 14 is a schematic diagram of a communication device provided in an embodiment of this application, wherein the communication device includes a transceiver module 1410 and a processing module 1420. The transceiver module 1410, also known as a transceiver unit, is used to implement the transceiver function, and may be a transceiver circuit, transceiver, transceiver device, or communication interface.

[0302] Taking the communication device as an example, which is the first access network device in the above method embodiment (which may be a chip of the first access network device, a module of the first access network device, or an internal device of the first access network device):

[0303] In this embodiment of the application, the processing module is used to determine the first configuration information and / or the second configuration information.

[0304] In this embodiment of the application, the transceiver module is used to send first configuration information and / or second configuration information to the first terminal device.

[0305] Wherein, the first configuration information includes the uplink and downlink configuration information of the first cell where the first terminal device is located, and / or the configuration information of the search space set of the physical downlink channel PDCCH of the random access response message RAR of the first cell, and the second configuration information is used to indicate the configuration information of the SSB of the first cell.

[0306] The first configuration information is indicated by a second SIB message, and the second configuration information is indicated by a third SIB message.

[0307] In one possible implementation of this application, the configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on at most one time slot in a set of time slots.

[0308] In one possible implementation of this application, the first parameter is a first sequence, which includes at most one bit value "1".

[0309] In one possible implementation of this application, the configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots.

[0310] In one possible implementation of this application, the first parameter is a first sequence, which includes one or more bit values ​​"1".

[0311] In one possible implementation of this application embodiment, the priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is lower than the priority of the uplink / downlink configuration information indicated by the first message.

[0312] The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

[0313] In one possible implementation of this application embodiment, the first configuration information further includes information for determining the listening timing of the PDCCH of the first SIB1 of the first cell;

[0314] The uplink / downlink configuration information indicated in the first message indicates the listening timing via an uplink symbol, a downlink symbol, or a flexible symbol.

[0315] In one possible implementation of this application embodiment, the uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined according to the uplink and downlink configuration information indicated by the first message is the same as or different from the symbol transmission direction of the first cell.

[0316] The symbol transmission direction of the first cell includes: uplink symbols, downlink symbols, or flexible symbols.

[0317] In one possible implementation of this application embodiment, the priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is greater than the priority of the uplink / downlink configuration information indicated by the first message.

[0318] The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

[0319] In one possible implementation of this application embodiment, the first configuration information further includes information for determining the listening timing of the PDCCH of the first SIB1 of the first cell;

[0320] The uplink / downlink configuration information indicated in the first message indicates the listening timing using a downlink symbol, or a flexible symbol.

[0321] In one possible implementation of this application embodiment, the uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined by the uplink and downlink configuration information indicated by the first message is the same as the symbol transmission direction of the first cell.

[0322] The symbol transmission direction of the first cell includes: uplink symbols, or downlink symbols.

[0323] In one possible implementation of this application embodiment, the SIB1 status type of the first cell includes: first SIB1, first SIB1, or no SIB1, where the first SIB1 is SIB1 periodically transmitted within the first cell, and no SIB1 means that SIB1 transmission has stopped on the first cell.

[0324] The configuration of the PDCCH of the first SIB1 is the same as that of the PDCCH of the first SIB1, and the configuration includes one or more of the following: CORESET, or, search space set.

[0325] In one possible implementation of this application embodiment, the SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell, and no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell.

[0326] The configuration of the PDCCH of the first SIB1 is different from that of the PDCCH of the second SIB1. The configuration includes one or more of the following: CORESET, or search space set.

[0327] In one possible implementation of this application embodiment, the third SSB of the first cell indicates a switch to the SIB1 state type of the first cell.

[0328] In one possible implementation of this application, the third SSB includes a MIB message, and the PDCCH configuration parameters in the MIB message indicate that the SIB1 message is used to indicate the SIB1 state type of the first cell.

[0329] In one possible implementation of this application, the third SSB includes a MIB message, and the SSB subcarrier offset parameter in the MIB message is used to indicate the SIB1 state type for switching the second cell.

[0330] In one possible implementation of this application embodiment, the paging message of the first cell is used to indicate the switching of the SIB1 state type of the first cell.

[0331] In one possible implementation of this application, the first configuration information further includes a first time period configuration for the first terminal device to listen to the PDCCH of SIB1 before requesting the first SIB1 of the first cell.

[0332] In one possible implementation of this application, the configuration of the first time period for the first terminal device to listen to the PDCCH of the SIB1 before requesting the first OD-SIB1 of the first cell is predefined.

[0333] In one possible implementation of this application, the configuration of the first time period includes at least one of the following: the start time of the first time period, the length of the first time period, or the end time of the first time period.

[0334] In one possible implementation of this application embodiment, the start time of the first time period includes the time domain offset of the start position of the first time period relative to the first reference point;

[0335] The first reference point includes one or more of the following:

[0336] The timing of sending the previous first wake-up signal before the first time period;

[0337] The timing of sending the next first wake-up signal after the first time period, wherein the first wake-up signal is used to request the first SIB1;

[0338] The time of the last SIB1 reception prior to the first time period;

[0339] Alternatively, the time window of the previous first SIB1 preceding the first time period.

[0340] In one possible implementation of this application embodiment, the end time of the first time period includes a first time domain offset of the end position of the first time period relative to the transmission timing of the next first wake-up signal after the first time period; wherein, the first time domain offset is greater than or equal to 0, the first wake-up signal is used to request the first SIB1, and the first SIB1 is an SIB1 transmitted on demand in the first cell.

[0341] In one possible implementation of this application embodiment, the first access network device is an access network device serving the first cell.

[0342] In one possible implementation of this application embodiment, the first cell is a cell under the second access network device, and the first access network device is an access network device serving the second cell.

[0343] In one possible implementation of this application embodiment, the SIB1 status type of the second cell includes at least one of the following: third SIB1, fourth SIB1, or no SIB1, wherein the fourth SIB1 is SIB1 that is periodically transmitted in the second cell, the no SIB1 is SIB1 that is stopped being transmitted in the second cell, and the third SIB1 is SIB1 that is transmitted on demand in the second cell.

[0344] The first condition is used to prevent the second terminal device without SIB1 from switching from the second cell to the third cell, where the SIB1 of the third cell is sent periodically. The first condition includes at least one of the following:

[0345] The SSB subcarrier offset parameter indication value in the MIB message included in the second SSB of the second cell does not meet the first range;

[0346] The type of the second SSB changes from CD SSB to NCD SSB;

[0347] The configuration parameters of the second SSB have been changed;

[0348] Alternatively, the paging message indication of the second cell may switch to the fourth SIB1, or there may be no SIB1.

[0349] In one possible implementation of this application embodiment, the SSB of the first cell includes one or more of the following: a first SSB, or a third SSB, wherein the third SSB is an SSB that is periodically transmitted within the first cell, and the first SSB is an SSB that is transmitted on demand within the first cell.

[0350] In one possible implementation of this application embodiment, the configuration information of the SSB of the first cell includes one or more of the following:

[0351] The parameters of the SSB burst pattern, SSB burst period, SSS power, SSB subcarrier spacing, system frame number (SFN), SSB half-frame indicator, number of SSB bursts, SSB frequency domain location, cell identifier (ID) corresponding to the SSB, and SSB signal quality threshold, or, parameters of the second wake-up signal; wherein, the second wake-up signal is used to request the first SSB, and the first SSB is an SSB transmitted on demand on the first cell.

[0352] In one possible implementation of this application embodiment, the second wake-up signal and the first wake-up signal are different signals, and the first wake-up signal is used to request the first SIB1.

[0353] In one possible implementation of this application embodiment, the second wake-up signal is sent by the first terminal device in the second cell, and the second wake-up signal is used to request the first SSB of the first cell.

[0354] In one possible implementation of this application, the resource of the first wake-up signal is determined by the first terminal device based on the mapping relationship between the first SSB and the PRACH of the first cell.

[0355] In one possible implementation of this application embodiment, the second wake-up signal is sent by the first terminal device in the first cell, and the second wake-up signal is used to request the first SSB of the first cell.

[0356] In one possible implementation of this application embodiment, the resource of the second wake-up signal sent by the first terminal device in the first cell is indicated by the second access network device, or the resource of the second wake-up signal sent by the first terminal device in the first cell is determined by the first terminal device according to the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

[0357] In one possible implementation of this application, the second wake-up signal and the first wake-up signal are a third wake-up signal, which is used to request the first SIB1 and the first SSB.

[0358] In one possible implementation of this application embodiment, the third wake-up signal is sent by the first terminal device in the second cell, or the third wake-up signal is sent by the first terminal device in the first cell.

[0359] In one possible implementation of this application embodiment, the triggering of the first SSB of the first cell is indicated by the second access network device to the first terminal device, or the triggering of the first SSB of the first cell is indicated by the first access network device to the first terminal device.

[0360] In one possible implementation of this application embodiment, the first SIB message is a non-SIB1 message, and the second SIB message is a non-SIB1 message.

[0361] Optionally, the communication device may further include a storage module 1430, which can be used to store instructions and / or data, and the processing module 1420 can read the instructions and / or data in the storage module 1430.

[0362] In this embodiment, the target access network device is presented as an integrated functional module. Here, "module" can refer to a specific ASIC, circuitry, a processor and memory executing one or more software or firmware programs, integrated logic circuitry, and / or other devices that can provide the aforementioned functions. In a simplified embodiment, those skilled in the art will recognize that the communication device can take the form of the communication device 900 shown in FIG. 9.

[0363] For example, the processor 901 in the communication device 900 shown in Figure 9 can call the computer execution instructions stored in the memory 903 to cause the communication device 900 to execute the communication method in the above method embodiment.

[0364] Specifically, the functions / implementation processes of the transceiver module 1410 and processing module 1420 in Figure 14 can be implemented by the processor 901 in the communication device 900 shown in Figure 9 calling computer execution instructions stored in the memory 903. Alternatively, the functions / implementation processes of the processing module 1420 in Figure 14 can be implemented by the processor 901 in the communication device 900 shown in Figure 9 calling computer execution instructions stored in the memory 903, and the functions / implementation processes of the transceiver module 1410 in Figure 14 can be implemented by the communication interface 904 in the communication device 900 shown in Figure 9.

[0365] Alternatively, taking the communication device as an example, which is the first terminal device in the above method embodiment (which may be a chip of the first terminal device, a module of the first terminal device, or an internal device of the first terminal device):

[0366] In this embodiment of the application, the transceiver module 1410 is used to receive first configuration information and / or second configuration information from the first access network device.

[0367] In this embodiment of the application, the processing module 1420 is used to complete the transmission of uplink and downlink information according to the first configuration information and / or the second configuration information, and / or to listen to the PDCCH, and / or to receive the SSB.

[0368] The first configuration information includes uplink and downlink configuration information of the first cell where the first terminal device is located, and / or configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell.

[0369] The first configuration information is indicated by a second SIB message, which is a non-SIB1 message; the second configuration information is indicated by a third SIB message, which is also a non-SIB1 message.

[0370] In one possible implementation of this application, the configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on at most one time slot in a set of time slots.

[0371] In one possible implementation of this application, the first parameter is a first sequence, which includes at most one bit value "1".

[0372] In one possible implementation of this application, the configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots.

[0373] In one possible implementation of this application, the first parameter is a first sequence, which includes one or more bit values ​​"1".

[0374] In one possible implementation of this application embodiment, the first configuration information further includes information for determining the listening timing of the PDCCH of the first SIB1 of the first cell;

[0375] The uplink / downlink configuration information indicated in the first message indicates the listening timing via an uplink symbol, a downlink symbol, or a flexible symbol.

[0376] In one possible implementation of this application embodiment, the uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined according to the uplink and downlink configuration information indicated by the first message is the same as or different from the symbol transmission direction of the first cell.

[0377] The symbol transmission direction of the first cell includes: uplink symbols, downlink symbols, or flexible symbols.

[0378] In one possible implementation of this application embodiment, the priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is greater than the priority of the uplink / downlink configuration information indicated by the first message.

[0379] The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

[0380] In one possible implementation of this application embodiment, the first configuration information further includes information for determining the listening timing of the PDCCH of the first SIB1 of the first cell;

[0381] The uplink / downlink configuration information indicated in the first message indicates the listening timing using a downlink symbol, or a flexible symbol.

[0382] In one possible implementation of this application embodiment, the uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined by the uplink and downlink configuration information indicated by the first message is the same as the symbol transmission direction of the first cell.

[0383] The symbol transmission direction of the first cell includes: uplink symbols, or downlink symbols.

[0384] In one possible implementation of this application embodiment, the SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell, and no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell.

[0385] The configuration of the PDCCH of the first SIB1 is the same as that of the PDCCH of the second SIB1, and the configuration includes one or more of the following: CORESET, or search space set.

[0386] In one possible implementation of this application embodiment, the SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell, and no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell.

[0387] The configuration of the PDCCH of the first SIB1 is different from that of the PDCCH of the second SIB1. The configuration includes one or more of the following: CORESET, or search space set.

[0388] In one possible implementation of this application embodiment, the third SSB of the first cell indicates a switch to the SIB1 state type of the first cell.

[0389] In one possible implementation of this application, the third SSB includes a MIB message, and the PDCCH configuration parameters in the MIB message indicate that the SIB1 message is used to indicate the SIB1 state type of the first cell.

[0390] In one possible implementation of this application, the third SSB includes a MIB message, and the SSB subcarrier offset parameter in the MIB message is used to indicate the SIB1 state type for switching the second cell.

[0391] In one possible implementation of this application embodiment, the paging message of the first cell is used to indicate the switching of the SIB1 state type of the first cell.

[0392] In one possible implementation of this application, the first configuration information further includes a first time period configuration for the first terminal device to listen to the PDCCH of SIB1 before requesting the first SIB1 of the first cell.

[0393] In one possible implementation of this application, the configuration of the first terminal device listening to the PDCCH of the SIB1 of the first cell for a first time period before requesting the first SIB1 of the first cell is predefined.

[0394] In one possible implementation of this application, the configuration of the first time period includes at least one of the following: the start time of the first time period, the length of the first time period, or the end time of the first time period.

[0395] In one possible implementation of this application embodiment, the start time of the first time period includes the time domain offset of the start position of the first time period relative to the first reference point;

[0396] The first reference point includes one or more of the following:

[0397] The timing of sending the previous first wake-up signal before the first time period;

[0398] The timing of sending the next first wake-up signal after the first time period, wherein the first wake-up signal is used to request the first SIB1;

[0399] The time of the last SIB1 reception prior to the first time period;

[0400] Alternatively, the time window of the previous first SIB1 preceding the first time period.

[0401] In one possible implementation of this application embodiment, the end time of the first time period includes a first time domain offset of the end position of the first time period relative to the timing of the transmission of the next first wake-up signal after the first time period; wherein, the first time domain offset is greater than or equal to 0, and the first wake-up signal is used to request the first SIB1.

[0402] In one possible implementation of this application embodiment, the first access network device is an access network device serving the first cell.

[0403] In one possible implementation of this application embodiment, the first cell is a cell under the second access network device, and the first access network device is an access network device serving the second cell.

[0404] In one possible implementation of this application embodiment, the SIB1 status type of the second cell includes at least one of the following: third SIB1, fourth SIB1, or no SIB1, wherein the fourth SIB1 is SIB1 that is periodically transmitted in the second cell, the no SIB1 is SIB1 that is stopped being transmitted in the second cell, and the third SIB1 is SIB1 that is transmitted on demand in the second cell.

[0405] The first condition is used to prevent the second terminal device without SIB1 from switching from the second cell to the third cell, where the SIB1 of the third cell is sent periodically. The first condition includes at least one of the following:

[0406] The SSB subcarrier offset parameter indication value in the MIB message included in the second SSB of the second cell does not meet the first range;

[0407] The type of the second SSB changes from CD SSB to NCD SSB;

[0408] The configuration parameters of the second SSB have been changed;

[0409] Alternatively, the paging message from the second cell may indicate a switch to the third SIB1, or there may be no SIB1.

[0410] In one possible implementation of this application embodiment, the SSB of the first cell includes one or more of the following: a first SSB, or a third SSB, wherein the third SSB is an SSB that is periodically transmitted within the first cell, and the first SSB is an SSB that is transmitted on demand within the first cell.

[0411] In one possible implementation of this application embodiment, the configuration information of the SSB of the first cell includes one or more of the following:

[0412] The parameters of the SSB burst include: the pattern of the SSB burst, the period of the SSB burst, the power of the secondary synchronization signal (SSS), the subcarrier spacing of the SSB, the system frame number (SFN), the half-frame indicator of the SSB, the number of SSB bursts, the frequency domain location of the SSB, the cell identifier (ID) corresponding to the SSB, and the signal quality threshold of the SSB; or, the parameters of the second wake-up signal. The second wake-up signal is used to request the first SSB, which is an SSB transmitted on demand within the first cell.

[0413] In one possible implementation of this application embodiment, the second wake-up signal and the first wake-up signal are different signals, and the first wake-up signal is used to request the first SIB1.

[0414] In one possible implementation of this application embodiment, the second wake-up signal is sent by the first terminal device in the second cell.

[0415] In one possible implementation of this application, the resource of the first wake-up signal is determined by the first terminal device based on the mapping relationship between the first SSB and the PRACH of the first cell.

[0416] In one possible implementation of this application embodiment, the second wake-up signal is sent by the first terminal device in the first cell, and the second wake-up signal is used to request the first SSB of the first cell.

[0417] In one possible implementation of this application embodiment, the resource of the second wake-up signal sent by the first terminal device in the first cell is indicated by the second access network device, or the resource of the second wake-up signal sent by the first terminal device in the first cell is determined by the first terminal device according to the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

[0418] In one possible implementation of this application, the second wake-up signal and the first wake-up signal are a third wake-up signal, which is used to request the first SIB1 and the first SSB.

[0419] In one possible implementation of this application embodiment, the third wake-up signal is sent by the first terminal device in the second cell, or the third wake-up signal is sent by the first terminal device in the first cell.

[0420] In one possible implementation of this application embodiment, the triggering of the first SSB of the first cell is indicated by the second access network device to the first terminal device, or the triggering of the first SSB is indicated by the first access network device to the first terminal device.

[0421] In one possible implementation of this application embodiment, the first SIB message is a non-SIB1 message, and the second SIB message is a non-SIB1 message.

[0422] Optionally, the communication device may further include a storage module 1430, which can be used to store instructions and / or data, and the processing module 1420 can read the instructions and / or data in the storage module 1430.

[0423] In this embodiment, the target access network device is presented as an integrated functional module. Here, "module" can refer to a specific ASIC, circuitry, a processor and memory executing one or more software or firmware programs, integrated logic circuitry, and / or other devices that can provide the aforementioned functions. In a simplified embodiment, those skilled in the art will recognize that the communication device can take the form of the communication device 900 shown in FIG. 9.

[0424] For example, the processor 901 in the communication device 900 shown in Figure 9 can call the computer execution instructions stored in the memory 903 to cause the communication device 900 to execute the communication method in the above method embodiment.

[0425] Specifically, the functions / implementation processes of the transceiver module 1410 and processing module 1420 in Figure 14 can be implemented by the processor 901 in the communication device 900 shown in Figure 9 calling computer execution instructions stored in the memory 903. Alternatively, the functions / implementation processes of the processing module 1420 in Figure 14 can be implemented by the processor 901 in the communication device 900 shown in Figure 9 calling computer execution instructions stored in the memory 903, and the functions / implementation processes of the transceiver module 1410 in Figure 14 can be implemented by the communication interface 904 in the communication device 900 shown in Figure 9.

[0426] It should be understood that one or more of the above modules or units can be implemented by software, hardware, or a combination of both. When any of the above modules or units are implemented by software, the software exists as computer program instructions and is stored in memory. The processor can be used to execute the program instructions and implement the above method flow. The processor can be built into a SoC (System-on-a-Chip) or ASIC, or it can be a separate semiconductor chip. In addition to the core that executes software instructions for computation or processing, the processor may further include necessary hardware accelerators, such as field-programmable gate arrays (FPGAs), PLDs (Programmable Logic Devices), or logic circuits that implement dedicated logic operations.

[0427] When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, microprocessor, digital signal processing (DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, SoC, FPGA, PLD, application-specific digital circuit, hardware accelerator, or non-integrated discrete device, which can run the necessary software or perform the above method flow independently of software.

[0428] Optionally, embodiments of this application also provide a communication device (e.g., the communication device may be a chip or a chip system), which includes a processor for implementing the methods in any of the above method embodiments. In one possible design, the communication device further includes a memory. The memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the methods in any of the above method embodiments. Of course, the memory may not be included in the communication device. When the communication device is a chip system, it may be composed of chips or may include chips and other discrete devices; embodiments of this application do not specifically limit this.

[0429] Optionally, embodiments of this application also provide a computer-readable storage medium storing a computer program or instructions that, when run on a communication device, enable the communication device to execute the methods described in any of the above method embodiments or any implementation thereof.

[0430] Optionally, embodiments of this application also provide a communication system, which includes the communication device described in the above method embodiments.

[0431] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs).

[0432] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0433] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the scope of this application. Accordingly, this specification and drawings are merely illustrative descriptions of the application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of the claims and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A communication method, characterized in that, Applied to the first terminal device, including: The first terminal device receives first configuration information and / or second configuration information from the first access network device. The first configuration information includes uplink and downlink configuration information of the first cell where the first terminal device is located, and / or configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell. The first configuration information is indicated by a first SIB message, and the second configuration information is indicated by a second SIB message. The first terminal device completes the reception of the first SIB1 and / or the first SSB according to the first configuration information and / or the second configuration information.

2. The method according to claim 1, characterized in that, The configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on at most one time slot in a set of time slots.

3. The method according to claim 2, characterized in that, The first parameter is a first sequence, which includes at most one bit value "1".

4. The method according to claim 1, characterized in that, The configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots.

5. The method according to claim 4, characterized in that, The first parameter is a first sequence, which includes one or more bit values ​​"1".

6. The method according to any one of claims 1 to 5, characterized in that, The priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is lower than the priority of the uplink / downlink configuration information indicated by the first message; The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

7. The method according to claim 6, characterized in that, The first configuration information also includes information for determining the timing of PDCCH monitoring for the first SIB1 of the first cell; The uplink / downlink configuration information indicated in the first message indicates the listening timing via an uplink symbol, a downlink symbol, or a flexible symbol.

8. The method according to claim 6, characterized in that, The uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell. The symbol transmission direction determined according to the uplink and downlink configuration information indicated by the first message may be the same as or different from the symbol transmission direction of the first cell. The symbol transmission direction of the first cell includes: uplink symbols, downlink symbols, or flexible symbols.

9. The method according to any one of claims 1 to 6, characterized in that, The priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is greater than the priority of the uplink / downlink configuration information indicated by the first message; The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

10. The method according to claim 9, characterized in that, The first configuration information also includes information for determining the listening timing of the PDCCH of the first SIB1 of the first cell; the uplink and downlink configuration information indicated by the first message indicates that the symbol for the listening timing is a downlink symbol, or a flexible symbol.

11. The method according to claim 10, characterized in that, The uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined by the uplink and downlink configuration information indicated by the first message is the same as the symbol transmission direction of the first cell. The symbol transmission direction of the first cell includes: uplink symbols, or downlink symbols.

12. The method according to any one of claims 1 to 11, characterized in that, The SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell. The no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell. The configuration of the PDCCH of the first SIB1 is the same as that of the PDCCH of the second SIB1, and the configuration includes one or more of the following: CORESET, or search space set.

13. The method according to any one of claims 1 to 11, characterized in that, The SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell. The no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell. The configuration of the PDCCH of the first SIB1 is different from that of the PDCCH of the second SIB1. The configuration includes one or more of the following: CORESET, or search space set.

14. The method according to claim 13, characterized in that, The third SSB indication of the first cell switches the SIB1 status type of the first cell.

15. The method according to claim 14, characterized in that, The third SSB includes a MIB message, in which the PDCCH configuration parameters indicate that the SIB1 message is used to indicate the SIB1 state type for switching the first cell.

16. The method according to claim 14, characterized in that, The third SSB includes a MIB message, in which the SSB subcarrier offset parameter is used to indicate the SIB1 state type for switching the second cell.

17. The method according to claim 13, characterized in that, The paging message of the first cell is used to indicate the switching of the SIB1 status type of the first cell.

18. The method according to any one of claims 1 to 17, characterized in that, The first configuration information also includes the configuration of the first terminal device listening to the PDCCH of SIB1 for a first time period before requesting the first SIB1 of the first cell.

19. The method according to any one of claims 1 to 17, characterized in that, The configuration of the first terminal device listening to the PDCCH of the SIB1 of the first cell for a first time period before requesting the first SIB1 of the first cell is predefined.

20. The method according to claim 18 or 19, characterized in that, The configuration of the first time period includes at least one of the following: the start time of the first time period, the length of the first time period, or the end time of the first time period.

21. The method according to claim 20, characterized in that, The start time of the first time period includes the time domain offset of the start position of the first time period relative to the first reference point; The first reference point includes one or more of the following: The timing of sending the previous first wake-up signal before the first time period; The timing of sending the next first wake-up signal after the first time period, wherein the first wake-up signal is used to request the first SIB1; The time of the last SIB1 reception prior to the first time period; Alternatively, the time window of the previous first SIB1 preceding the first time period.

22. The method according to claim 20 or 21, characterized in that, The end time of the first time period includes a first time-domain offset of the end position of the first time period relative to the timing of the transmission of the next first wake-up signal after the first time period; wherein the first time-domain offset is greater than or equal to 0, and the first wake-up signal is used to request the first SIB1.

23. The method according to any one of claims 1 to 22, characterized in that, The first access network device is an access network device that serves the first cell.

24. The method according to any one of claims 1 to 22, characterized in that, The first cell is a cell under the second access network device, and the first access network device is an access network device that serves the second cell.

25. The method according to claim 24, characterized in that, The SIB1 status type of the second cell includes at least one of the following: third SIB1, fourth SIB1, or no SIB1, wherein the fourth SIB1 is SIB1 that is periodically transmitted in the second cell, the no SIB1 is SIB1 that is stopped being transmitted in the second cell, and the third SIB1 is SIB1 that is transmitted on demand in the second cell. The first condition is used to prevent the second terminal device without SIB1 from switching from the second cell to the third cell, where the SIB1 of the third cell is sent periodically. The first condition includes at least one of the following: The SSB subcarrier offset parameter indication value in the MIB message included in the second SSB of the second cell does not meet the first range; The type of the second SSB changes from CD SSB to NCD SSB; The configuration parameters of the second SSB have been changed; Alternatively, the paging message from the second cell may indicate a switch to the third SIB1, or there may be no SIB1.

26. The method according to claim 24 or 25, characterized in that, The SSB of the first cell includes one or more of the following: a first SSB, or a third SSB, wherein the third SSB is an SSB that is periodically transmitted within the first cell, and the first SSB is an SSB that is transmitted on demand within the first cell.

27. The method according to claim 24 or 25, characterized in that, The configuration information of the SSB of the first cell includes one or more of the following: The parameters of the SSB burst include: the pattern of the SSB burst, the period of the SSB burst, the power of the secondary synchronization signal (SSS), the subcarrier spacing of the SSB, the system frame number (SFN), the half-frame indicator of the SSB, the number of SSB bursts, the frequency domain location of the SSB, the cell identifier (ID) corresponding to the SSB, and the signal quality threshold of the SSB; or, the parameters of the second wake-up signal. The second wake-up signal is used to request the first SSB, which is an SSB transmitted on demand within the first cell.

28. The method according to claim 27, characterized in that, The second wake-up signal is different from the first wake-up signal. The first wake-up signal is used to request the first SIB1.

29. The method according to claim 28, characterized in that, The second wake-up signal is sent by the first terminal device in the second cell.

30. The method according to claim 29, characterized in that, The resources for the first wake-up signal are determined by the first terminal device based on the mapping relationship between the first SSB and the PRACH of the first cell.

31. The method according to claim 28, characterized in that, The second wake-up signal is sent by the first terminal device in the first cell, and the second wake-up signal is used to request the first SSB of the first cell.

32. The method according to claim 31, characterized in that, The resource of the second wake-up signal sent by the first terminal device in the first cell is indicated by the second access network device, or the resource of the second wake-up signal sent by the first terminal device in the first cell is determined by the first terminal device according to the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

33. The method according to claim 27, characterized in that, The second wake-up signal and the first wake-up signal are a third wake-up signal, which is used to request the first SIB1 and the first SSB.

34. The method according to claim 33, characterized in that, The third wake-up signal is sent by the first terminal device in the second cell, or the third wake-up signal is sent by the first terminal device in the first cell.

35. The method according to claim 29, characterized in that, The first SSB of the first cell is triggered by the second access network device indicating to the first terminal device, or the first SSB is triggered by the first access network device indicating to the first terminal device.

36. The method according to any one of claims 1 to 35, characterized in that, The first SIB message is a non-SIB1 message, and the second SIB message is a non-SIB1 message.

37. A communication method, characterized in that, Applied to first access network equipment, including: The first access network device sends first configuration information and / or second configuration information to the first terminal device. The first configuration information includes uplink and downlink configuration information of the first cell where the first terminal device is located, and / or configuration information of the search space set of the physical downlink channel (PDCCH) of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell. The first configuration information is indicated by a first SIB message, and the second configuration information is indicated by a second SIB message.

38. The method according to claim 37, characterized in that, The configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on at most one time slot in a set of time slots.

39. The method according to claim 38, characterized in that, The first parameter is a first sequence, which includes at most one bit value "1".

40. The method according to claim 37, characterized in that, The configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots.

41. The method according to claim 40, characterized in that, The first parameter is a first sequence, which includes one or more bit values ​​"1".

42. The method according to any one of claims 37 to 41, characterized in that, The priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is lower than the priority of the uplink / downlink configuration information indicated by the first message; The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

43. The method according to claim 42, characterized in that, The first configuration information also includes information for determining the timing of PDCCH monitoring for the first SIB1 of the first cell; The uplink / downlink configuration information indicated in the first message indicates the listening timing via an uplink symbol, a downlink symbol, or a flexible symbol.

44. The method according to claim 42, characterized in that, The uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell. The symbol transmission direction determined according to the uplink and downlink configuration information indicated by the first message may be the same as or different from the symbol transmission direction of the first cell. The symbol transmission direction of the first cell includes: uplink symbols, downlink symbols, or flexible symbols.

45. The method according to any one of claims 37 to 41, characterized in that, The priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is greater than the priority of the uplink / downlink configuration information indicated by the first message; The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

46. ​​The method according to claim 45, characterized in that, The first configuration information also includes information for determining the timing of PDCCH monitoring for the first SIB1 of the first cell; The uplink / downlink configuration information indicated in the first message indicates the listening timing using a downlink symbol, or a flexible symbol.

47. The method according to claim 45, characterized in that, The uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined by the uplink and downlink configuration information indicated by the first message is the same as the symbol transmission direction of the first cell. The symbol transmission direction of the first cell includes: uplink symbols, or downlink symbols.

48. The method according to any one of claims 37 to 47, characterized in that, The SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell. The no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell. The configuration of the PDCCH of the first SIB1 is the same as that of the PDCCH of the second SIB1, and the configuration includes one or more of the following: CORESET, or search space set.

49. The method according to any one of claims 37 to 47, characterized in that, The SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is SIB1 that is periodically sent in the first cell. The no SIB1 means that SIB1 is stopped being sent in the first cell. The first SIB1 is SIB1 that is sent on demand in the first cell. The configuration of the PDCCH of the first SIB1 is different from that of the PDCCH of the second SIB1. The configuration includes one or more of the following: CORESET, or search space set.

50. The method according to claim 49, characterized in that, The third SSB indication of the first cell switches the SIB1 status type of the first cell.

51. The method according to claim 50, characterized in that, The third SSB includes a MIB message, in which the PDCCH configuration parameters indicate that the SIB1 message is used to indicate the SIB1 state type for switching the first cell.

52. The method according to claim 50, characterized in that, The third SSB includes a MIB message, in which the SSB subcarrier offset parameter is used to indicate the SIB1 state type for switching the second cell.

53. The method according to claim 49, characterized in that, The paging message of the first cell is used to indicate the switching of the SIB1 status type of the first cell.

54. The method according to any one of claims 37 to 53, characterized in that, The first configuration information also includes the configuration of the first terminal device listening to the PDCCH of SIB1 for a first time period before requesting the first SIB1 of the first cell.

55. The method according to any one of claims 37 to 53, characterized in that, The configuration of the first terminal device listening to the PDCCH of the SIB1 for a first time period before requesting the first OD-SIB1 of the first cell is predefined.

56. The method according to claim 54 or 55, characterized in that, The configuration of the first time period includes at least one of the following: the start time of the first time period, the length of the first time period, or the end time of the first time period.

57. The method according to claim 56, characterized in that, The start time of the first time period includes the time domain offset of the start position of the first time period relative to the first reference point; The first reference point includes one or more of the following: The timing of sending the previous first wake-up signal before the first time period; The timing of sending the next first wake-up signal after the first time period, wherein the first wake-up signal is used to request the first SIB1; The time of the last SIB1 reception prior to the first time period; Alternatively, the time window of the previous first SIB1 preceding the first time period.

58. The method according to claim 56 or 57, characterized in that, The end time of the first time period includes a first time domain offset relative to the timing of the transmission of the next first wake-up signal after the first time period; wherein the first time domain offset is greater than or equal to 0, the first wake-up signal is used to request the first SIB1, and the first SIB1 is an SIB1 transmitted on demand within the first cell.

59. The method according to any one of claims 37 to 58, characterized in that, The first access network device is an access network device that serves the first cell.

60. The method according to any one of claims 37 to 58, characterized in that, The first cell is a cell under the second access network device, and the first access network device is an access network device that serves the second cell.

61. The method according to claim 60, characterized in that, The SIB1 status type of the second cell includes at least one of the following: third SIB1, fourth SIB1, or no SIB1, wherein the fourth SIB1 is SIB1 that is periodically transmitted in the second cell, the no SIB1 is SIB1 that is stopped being transmitted in the second cell, and the third SIB1 is SIB1 that is transmitted on demand in the second cell. The first condition is used to prevent the second terminal device without SIB1 from switching from the second cell to the third cell, where the SIB1 of the third cell is sent periodically. The first condition includes at least one of the following: The SSB subcarrier offset parameter indication value in the MIB message included in the second SSB of the second cell does not meet the first range; The type of the second SSB changes from CD SSB to NCD SSB; The configuration parameters of the second SSB have been changed; Alternatively, the paging message indication of the second cell may switch to the fourth SIB1, or there may be no SIB1.

62. The method according to claim 60 or 61, characterized in that, The SSB of the first cell includes one or more of the following: a first SSB, or a third SSB, wherein the third SSB is an SSB that is periodically transmitted within the first cell, and the first SSB is an SSB that is transmitted on demand within the first cell.

63. The method according to claim 61 or 62, characterized in that, The configuration information of the SSB of the first cell includes one or more of the following: The parameters of the SSB burst pattern, SSB burst period, SSS power, SSB subcarrier spacing, system frame number (SFN), SSB half-frame indicator, number of SSB bursts, SSB frequency domain location, cell identifier (ID) corresponding to the SSB, and SSB signal quality threshold, or, parameters of the second wake-up signal; wherein, the second wake-up signal is used to request the first SSB, and the first SSB is an SSB transmitted on demand on the first cell.

64. The method according to claim 63, characterized in that, The second wake-up signal is different from the first wake-up signal. The first wake-up signal is used to request the first SIB1.

65. The method according to claim 64, characterized in that, The second wake-up signal is sent by the first terminal device in the second cell, and the second wake-up signal is used to request the first SSB of the first cell.

66. The method according to claim 65, characterized in that, The resources for the first wake-up signal are determined by the first terminal device based on the mapping relationship between the first SSB and the PRACH of the first cell.

67. The method according to claim 64, characterized in that, The second wake-up signal is sent by the first terminal device in the first cell, and the second wake-up signal is used to request the first SSB of the first cell.

68. The method according to claim 67, characterized in that, The resource of the second wake-up signal sent by the first terminal device in the first cell is indicated by the second access network device, or the resource of the second wake-up signal sent by the first terminal device in the first cell is determined by the first terminal device according to the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

69. The method according to claim 63, characterized in that, The second wake-up signal and the first wake-up signal are a third wake-up signal, which is used to request the first SIB1 and the first SSB.

70. The method according to claim 69, characterized in that, The third wake-up signal is sent by the first terminal device in the second cell, or the third wake-up signal is sent by the first terminal device in the first cell.

71. The method according to claim 65, characterized in that, The first SSB of the first cell is triggered by the second access network device indicating to the first terminal device, or the first SSB of the first cell is triggered by the first access network device indicating to the first terminal device.

72. The method according to any one of claims 37 to 71, characterized in that, The first SIB message is a non-SIB1 message, and the second SIB message is a non-SIB1 message.

73. A communication system, characterized in that, include: The first access network device is configured to send first configuration information and / or second configuration information to the first terminal device; A first terminal device is configured to receive the first configuration information and / or the second configuration information from the access network device; The first terminal device is further configured to complete the transmission of uplink and downlink information according to the first configuration information and / or the second configuration information, and / or listen to the PDCCH, and / or receive the SSB; The first configuration information includes the uplink and downlink configuration information of the first cell where the first terminal device is located, and / or the configuration information of the search space set of the physical downlink channel PDCCH of the random access response message (RAR) of the first cell. The second configuration information is used to indicate the configuration information of the SSB of the first cell. The first configuration information is indicated by a first SIB message, and the second configuration information is indicated by a second SIB message.

74. The communication system according to claim 73, characterized in that, The configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on at most one time slot in a set of time slots.

75. The communication system according to claim 74, characterized in that, The first parameter is a first sequence, which includes at most one bit value "1".

76. The communication system according to claim 73, characterized in that, The configuration information of the search space set of the PDCCH of the RAR of the first cell includes a first parameter, which instructs the first terminal device to listen to the PDCCH on one or more time slots in a set of time slots.

77. The communication system according to claim 76, characterized in that, The first parameter is a first sequence, which includes one or more bit values ​​"1".

78. The communication system according to any one of claims 73 to 77, characterized in that, The priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is lower than the priority of the uplink / downlink configuration information indicated by the first message; The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

79. The communication system according to claim 78, characterized in that, The first configuration information also includes information for determining the timing of PDCCH monitoring for the first SIB1 of the first cell; The uplink / downlink configuration information indicated in the first message indicates the listening timing via an uplink symbol, a downlink symbol, or a flexible symbol.

80. The communication system according to claim 78, characterized in that, The uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell. The symbol transmission direction determined according to the uplink and downlink configuration information indicated by the first message may be the same as or different from the symbol transmission direction of the first cell. The symbol transmission direction of the first cell includes: uplink symbols, downlink symbols, or flexible symbols.

81. The communication system according to any one of claims 73 to 78, characterized in that, The priority of the uplink / downlink configuration information of the first cell indicated by the first configuration information is greater than the priority of the uplink / downlink configuration information indicated by the first message; The first message includes one or more of the following: SIB1 message, Radio Access Control (RRC) signaling, or Downlink Control (DCI) signaling.

82. The communication system according to claim 81, characterized in that, The first configuration information also includes information for determining the timing of PDCCH monitoring for the first SIB1 of the first cell; The uplink / downlink configuration information indicated in the first message indicates the listening timing using a downlink symbol, or a flexible symbol.

83. The communication system according to claim 81, characterized in that, The uplink and downlink configuration information of the first cell determines the symbol transmission direction of the first cell, and the symbol transmission direction determined by the uplink and downlink configuration information indicated by the first message is the same as the symbol transmission direction of the first cell. The symbol transmission direction of the first cell includes: uplink symbols, or downlink symbols.

84. The communication system according to any one of claims 73 to 83, characterized in that, The SIB1 status type of the first cell includes: first SIB1, second SIB1, or no SIB1. The second SIB1 is the SIB1 that is periodically sent in the first cell. The no SIB1 means that the first cell has stopped sending SIB1. The first SIB1 is the SIB1 that is sent on demand in the first cell. The configuration of the PDCCH of the first SIB1 is the same as that of the PDCCH of the second SIB1, and the configuration includes one or more of the following: CORESET, or search space set.

85. The communication system according to any one of claims 73 to 83, characterized in that, The SIB1 status type of the first cell includes: third SIB1, fourth SIB1, or no SIB1. The fourth SIB1 is the SIB1 that is periodically sent on the first cell, the third SIB1 is the SIB1 that is sent on demand on the first cell, and no SIB1 means that the first cell has stopped sending SIB1. The configuration of the PDCCH of the third SIB1 is different from that of the PDCCH of the fourth SIB1. The configuration includes one or more of the following: CORESET, or search space set.

86. The communication system according to claim 85, characterized in that, The third SSB indication of the first cell switches the SIB1 status type of the first cell.

87. The communication system according to claim 86, characterized in that, The third SSB includes a MIB message, in which the PDCCH configuration parameters indicate that the SIB1 message is used to indicate the SIB1 state type for switching the first cell.

88. The communication system according to claim 86, characterized in that, The third SSB includes a MIB message, in which the SSB subcarrier offset parameter is used to indicate the SIB1 state type for switching the second cell.

89. The communication system according to claim 85, characterized in that, The paging message of the first cell is used to indicate the switching of the SIB1 status type of the first cell.

90. The communication system according to any one of claims 73 to 89, characterized in that, The first configuration information also includes the configuration of the first terminal device listening to the PDCCH of SIB1 for a first time period before requesting the first SIB1 of the first cell.

91. The communication system according to any one of claims 73 to 89, characterized in that, The configuration of the first terminal device listening to the PDCCH of the SIB1 of the first cell for a first time period before requesting the first SIB1 of the first cell is predefined.

92. The communication system according to claim 90 or 91, characterized in that, The configuration of the first time period includes at least one of the following: the start time of the first time period, the length of the first time period, or the end time of the first time period.

93. The communication system according to claim 92, characterized in that, The start time of the first time period includes the time domain offset of the start position of the first time period relative to the first reference point; The first reference point includes one or more of the following: The timing of sending the previous first wake-up signal before the first time period; The timing of sending the next first wake-up signal after the first time period, wherein the first wake-up signal is used to request the first SIB1; The time of the last SIB1 reception prior to the first time period; Alternatively, the time window of the previous first OD-SIB1 prior to the first time period.

94. The communication system according to claim 92 or 93, characterized in that, The end time of the first time period includes a first time-domain offset of the end position of the first time period relative to the timing of the transmission of the next first wake-up signal after the first time period; wherein the first time-domain offset is greater than or equal to 0, and the first wake-up signal is used to request the first SIB1.

95. The communication system according to any one of claims 73 to 94, characterized in that, The first access network device is an access network device that serves the first cell.

96. The communication system according to any one of claims 73 to 94, characterized in that, The first access network device is an access network device serving the second cell; The communication system also includes: The second access network device is an access network device that serves the first cell.

97. The communication system according to claim 96, characterized in that, The SIB1 status type of the second cell includes at least one of the following: third SIB1, fourth SIB1, or no SIB1, wherein the fourth SIB1 is SIB1 that is periodically transmitted on the second cell, the no SIB1 is SIB1 that is stopped being transmitted on the second cell, and the third SIB1 is SIB1 that is transmitted on demand on the second cell. The communication system further includes: a second terminal device; The first condition is used for the second terminal device that does not support the third SIB1 or does not have SIB1 to switch from the second cell to the third cell, wherein the SIB1 of the third cell is sent periodically, and the first condition includes at least one of the following: The SSB subcarrier offset parameter indication value in the MIB message included in the second SSB of the second cell does not meet the first range; The type of the second SSB changes from CD SSB to NCD SSB; The configuration parameters of the second SSB have been changed; Alternatively, the paging message indication for the second cell may switch to the second OD-SIB1, or there may be no SIB1.

98. The communication system according to claim 96 or 97, characterized in that, The SSB of the first cell includes one or more of the following: a first SSB, or a third SSB, wherein the third SSB is an SSB that is periodically transmitted on the first cell, and the first SSB is an SSB that is transmitted on demand on the first cell.

99. The communication system according to claim 96 or 97, characterized in that, The configuration information of the SSB of the first cell includes one or more of the following: The parameters of the SSB burst include: the pattern of the SSB burst, the period of the SSB burst, the power of the secondary synchronization signal (SSS), the subcarrier spacing of the SSB, the system frame number (SFN), the half-frame indicator of the SSB, the number of SSB bursts, the frequency domain location of the SSB, the cell identifier (ID) corresponding to the SSB, and the signal quality threshold of the SSB; or, the parameters of the second wake-up signal. The second wake-up signal is used to request the first SSB, which is an SSB transmitted on demand on the first cell.

100. The communication system according to claim 99, characterized in that, The second wake-up signal is different from the first wake-up signal. The first wake-up signal is used to request the first SIB1.

101. The communication system according to claim 100, characterized in that, The first terminal device is further configured to send the second wake-up signal to the first access network device in the second cell; The first access network device is further configured to receive the second wake-up signal from the first terminal device in the second cell.

102. The communication system according to claim 101, characterized in that, The first terminal device is further configured to determine the resources of the first wake-up signal based on the mapping relationship between the first SSB of the first cell and the PRACH of the first cell.

103. The communication system according to claim 100, characterized in that, The first terminal device is further configured to send a second wake-up signal to the second access network device in the first cell; The second access network device is further configured to receive a second wake-up signal from the first terminal device in the first cell, the second wake-up signal being used to request the first SSB of the first cell.

104. The communication system according to claim 103, characterized in that, The second access network device is further configured to indicate the resources of the second wake-up signal to the first terminal device in the first cell; The first terminal device is further configured to receive, in the first cell, resources from the second access network device indicating the second wake-up signal; Alternatively, the first terminal device is further configured to determine the resources of the second wake-up signal based on the mapping relationship between the SSB of the second cell and the PRACH of the first cell.

105. The communication system according to claim 99, characterized in that, The second wake-up signal and the first wake-up signal are a third wake-up signal, which is used to request the first SIB1 and the first SSB.

106. The communication system according to claim 105, characterized in that, The first terminal device is further configured to send the third wake-up signal to the first access network device in the second cell; The first access network device is further configured to receive the third wake-up signal from the first terminal device in the second cell; Alternatively, the first terminal device is further configured to send the third wake-up signal to the second access network device in the first cell; The second access network device is further configured to receive the third wake-up signal from the first terminal device in the first cell.

107. The communication system according to claim 101, characterized in that, The second access network device is further configured to send indication information to the first terminal device that triggers the first SSB of the first cell; The first terminal device is further configured to receive indication information from the second access network device that triggers the first SSB of the first cell; Alternatively, the first access network device is further configured to send indication information to the first terminal device that triggers the first SSB of the first cell; The first terminal device is further configured to receive indication information from the first access network device to trigger the first SSB of the first cell.

108. The communication system according to any one of claims 73 to 107, characterized in that, The first SIB message is a non-SIB1 message, and / or the second SIB message is a non-SIB1 message.

109. A communication device, characterized in that, The communication device includes a module for performing the method according to any one of claims 1 to 36, or includes a module for performing the method according to any one of claims 37 to 72.

110. A communication device, characterized in that, The communication device includes a processor; the processor is configured to perform the method according to any one of claims 1 to 36, or to cause the communication device to perform the method according to any one of claims 37 to 72.

111. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes instructions that, when executed, cause the method according to any one of claims 1 to 36 to be implemented, or cause the method according to any one of claims 37 to 72 to be implemented.

112. A computer program product, characterized in that, The computer program product includes instructions that, when executed, cause the method according to any one of claims 1 to 36 to be implemented, or cause the method according to any one of claims 37 to 72 to be implemented.

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