Cell Access Method, Device and Storage Medium

Abstract

An embodiment of the present application provides a cell access method, device, and storage medium. The method includes: a terminal device receives a first Synchronization Signal Block (SSB); the terminal device determines a target cell that supports the access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB, and the terminal device accesses the target cell. In the solution of the embodiment of the present application, if the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device, the terminal device does not need to perform blind detection on the Physical Downlink Control Channel (PDCCH) of this cell, saving the time for accessing the network. Moreover, it is determined whether the cell corresponding to the first SSB is the target cell only according to the bandwidth information included in the first SSB and the preset bandwidth, without adding additional signaling overhead, having a small impact on the existing New Radio (NR) system and low complexity.

Description

Technical Field

[0001] The embodiments of the present application relate to communication technologies, and in particular, to a cell access method, device, and storage medium. Background Art

[0002] The 5G New Radio (NR) system is mainly designed to support Enhanced Mobile Broadband (eMBB) services. It is mainly to meet the needs of high rate, high spectral efficiency, and large bandwidth. In practical applications, in addition to eMBB, there are also various different service types, such as sensor networks, video surveillance, wearables, etc. They have different requirements from eMBB services in terms of rate, bandwidth, power consumption, cost, etc. The capabilities of terminals supporting these services are reduced compared to terminals supporting eMBB, such as reduced supported bandwidth, relaxed processing time, reduced number of antennas, etc.

[0003] The current cell access scheme of the NR system is as follows: The terminal obtains the search space of the Physical Downlink Control Channel (PDCCH) and the Control Resource Set (CORESET) through the received Synchronization Signal Block (SSB). The terminal blindly detects the PDCCH according to the PDCCH search space and CORESET. In the above scheme, if the PDCCH bandwidth is large while the bandwidth supported by a low-capability terminal is small, it may take a long time to detect the PDCCH, and finally the PDCCH cannot be detected, resulting in a long network access time. Summary of the Invention

[0004] The embodiments of the present application provide a cell access method, device, and storage medium to reduce the network access time of terminal devices.

[0005] In a first aspect, the embodiments of the present application can provide a cell access method, including:

[0006] The terminal device receives a first Synchronization Signal Block (SSB);

[0007] The terminal device determines a target cell that supports the access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB;

[0008] The terminal device accesses the target cell.

[0009] In a second aspect, the embodiments of the present application can provide a cell access method, including:

[0010] The network device sends a first Synchronization Signal Block (SSB), and the first SSB includes bandwidth information; the bandwidth information and a preset bandwidth are used to indicate a target cell that supports access.

[0011] In a third aspect, an embodiment of the present application may provide a terminal device, including:

[0012] a receiving module, configured to receive a first Synchronization Signal Block (SSB);

[0013] a determining module, configured to determine a target cell that supports the access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB.

[0014] In a fourth aspect, an embodiment of the present application may provide a network device, including:

[0015] a sending module, configured to send a first Synchronization Signal Block (SSB), where the first SSB includes bandwidth information; the bandwidth information and a preset bandwidth are used to indicate a target cell that supports access.

[0016] In a fifth aspect, an embodiment of the present application may further provide a terminal device, including:

[0017] a processor, a memory, and an interface for communicating with a network device;

[0018] the memory stores computer-executable instructions;

[0019] the processor executes the computer-executable instructions stored in the memory, so that the processor executes the cell access method provided in any item of the first aspect.

[0020] In a sixth aspect, an embodiment of the present application may further provide a network device, including:

[0021] a processor, a memory, and an interface for communicating with a terminal device;

[0022] the memory stores computer-executable instructions;

[0023] the processor executes the computer-executable instructions stored in the memory, so that the processor executes the cell access method provided in any item of the second aspect.

[0024] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement the cell access method described in any item of the first aspect.

[0025] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the cell access method according to any one of the second aspects when executed by a processor.

[0026] In a ninth aspect, an embodiment of the present application provides a program, which is used to execute the cell access method according to any one of the first aspects when executed by a processor.

[0027] In a tenth aspect, an embodiment of the present application further provides a program, which is used to execute the cell access method according to any one of the second aspects when executed by a processor.

[0028] In one embodiment, the above-mentioned processor may be a chip.

[0029] In an eleventh aspect, an embodiment of the present application provides a computer program product including program instructions for implementing the cell access method according to any one of the first aspects.

[0030] In a twelfth aspect, an embodiment of the present application provides a computer program product including program instructions for implementing the cell access method according to any one of the second aspects.

[0031] In a thirteenth aspect, an embodiment of the present application provides a chip including a processing module and a communication interface, and the processing module can execute the cell access method according to any one of the first aspects.

[0032] Furthermore, the chip further includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the cell access method according to any one of the first aspects.

[0033] In a fourteenth aspect, an embodiment of the present application provides a chip including a processing module and a communication interface, and the processing module can execute the cell access method according to any one of the second aspects.

[0034] Furthermore, the chip further includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the cell access method according to any one of the second aspects.

[0035] The cell access method, device, and storage medium provided by the embodiments of this application. The terminal device receives a first synchronization signal block (SSB). The terminal device determines a target cell that supports the access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB, realizing that the terminal device can determine whether the cell corresponding to the first SSB is the target cell that supports the access of the terminal device according to the preset bandwidth and the bandwidth information included in the first SSB. If the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device, the terminal device does not need to perform blind detection on the physical downlink control channel (PDCCH) of this cell, saving the time for accessing the network. Moreover, only according to the preset bandwidth and the bandwidth information included in the first SSB to determine whether the cell corresponding to the first SSB is the target cell, without adding additional signaling overhead, having a relatively small impact on the existing New Radio (NR) system and a relatively low complexity. Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0037] Figure 1 It is a schematic diagram of the SSB structure;

[0038] Figure 2 It is a schematic diagram of a communication system applied in the embodiments of this application;

[0039] Figure 3 It is a flowchart of an embodiment of the data transmission method provided by this application;

[0040] Figure 4 It is a schematic diagram of the principle for determining the frequency-domain position of the second SSB in an embodiment of the method provided by this application;

[0041] Figure 5 It is a schematic diagram of the principle for determining the frequency-domain position of the second SSB in another embodiment of the method provided by this application;

[0042] Figure 6 It is a flowchart of another embodiment of the method provided by this application;

[0043] Figure 7 It is a flowchart of yet another embodiment of the method provided by this application;

[0044] Figure 8 It is a flowchart of yet another embodiment of the method provided by this application;

[0045] Figure 9Interaction flowchart of an embodiment of the data transmission method provided by this application;

[0046] Figure 10 Schematic structural diagram of Embodiment 1 of the terminal device provided by this application;

[0047] Figure 11 Schematic structural diagram of Embodiment 1 of the network device provided by this application;

[0048] Figure 12 Schematic structural diagram of Embodiment 2 of the terminal device provided by this application;

[0049] Figure 13 Schematic structural diagram of Embodiment 2 of the network device provided by this application. Detailed implementation manners

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0051] Terms such as "first" and "second" in the specification, claims, and the above-mentioned accompanying drawings of the embodiments of this application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product, or device.

[0052] Currently, with the pursuit of rate, latency, high-speed mobility, and energy efficiency by people, as well as the diversity and complexity of services in future life, the 3GPP international standards organization has started to research 5G. 5G is mainly designed to support eMBB services. It is mainly to meet the needs of high rate, high spectral efficiency, and large bandwidth.

[0053] Some concepts involved in this application are introduced below:

[0054] 1. Synchronization Signal Block (SS / Physical Broadcast Channel (PBCH) block, SSB):

[0055] In the NR system, common channels and signals, such as synchronization signals (SS) and broadcast channels, need to cover the entire cell through multi-beam scanning to facilitate reception by terminal devices within the cell. The multi-beam transmission of the synchronization signal SS is achieved by defining an SS / PBCH burst set. An SS burst set contains one or more SS / PBCH blocks (hereinafter referred to as SSBs). An SSB is used to carry the synchronization signal and broadcast channel of one beam. Therefore, an SS burst set can contain the synchronization signals of number beams of SSBs within the cell. The maximum number L of SSBnumber is related to the frequency band of the system:

[0056] For frequency bands above 3 GHz, L is 4;

[0057] For the frequency band of 3 GHz - 6 GHz, L is 8;

[0058] For 6 GHz - 52.6 GHz, L is 64.

[0059] An SSB contains the Primary Synchronization Signal (PSS) of one symbol, the Secondary Synchronization Signal (SSS) of one symbol, and two symbols of the NR Physical Broadcast Channel (PBCH), as Figure 1 shown. Among them, the time-frequency resources occupied by the PBCH contain Demodulation Reference Signals (DMRS) for the demodulation of the PBCH.

[0060] 2. Synchronization raster

[0061] For the radio spectrum in NR, the frequency-domain position of the synchronization signal block is defined by the synchronization raster. As shown in Table 1 below, in different frequency ranges, the possible frequency-domain positions of the synchronization signal block are determined by the formulas in Table 1 and are numbered through SS REF for numbering.

[0062] Table 1 SS raster for different frequency bands

[0063]

[0064] After determining the synchronization raster, the resource mapping of the synchronization signal block is determined according to Table 2 below. That is, the synchronization raster is located in the resource element RE numbered 0 of the PRB numbered 10 among the 20 physical resource blocks (PRBs) of the synchronization signal block.

[0065] Table 2 Synchronization Raster and SSB RE Mapping

[0066] RE index k 0 <![CDATA[PRB number n PRB of the SSB]]> <![CDATA[n PRB = 10]]>

[0067] For the synchronization raster, in different frequency bands, the distribution of the synchronization raster within the frequency band is determined according to Table 3 below. For example, for frequency band n77, the number range of the synchronization raster is 7711–8329, with a total of 619 synchronization rasters. This number is called the Global Synchronization Channel Number (GSCN). The terminal device searches for the SS / PBCH block according to the position of the synchronization raster in a specific frequency band, so as to obtain synchronization and receive the Master Information Block (MIB) and System Information Block (SIB) information.

[0068] Table 3 SS raster entries applicable to each operating frequency band

[0069]

[0070] In practical applications, in addition to eMBB, there are also various different service types, such as sensor networks, video surveillance, wearables, etc. They have different requirements from eMBB services in terms of rate, bandwidth, power consumption, cost, etc. The capabilities of terminals supporting these services are reduced compared to terminals supporting eMBB, such as reduced supported bandwidth, relaxed processing time, reduced number of antennas, etc. For the above services and corresponding low-capability terminals, the NR system needs to be optimized, and the optimized system becomes the NR-light system.

[0071] The frequency bands of 5G are divided into two parts: FR1 (f < 6 GHz, low frequency) and FR2 (f > 6 GHz, high frequency, millimeter wave). The bandwidth of FR1 can be 5 MHz, 10 MHz, 15 MHz, 20 MHz, 25 MHz, 30 MHz, 40 MHz, 50 MHz, 60 MHz, 80 MHz, and 100 MHz. The bandwidth of FR2 can be 50 MHz, 100 MHz, 200 MHz, 400 MHz, etc. In order for the terminal device to support network access in the 5G frequency band, for FR1, the bandwidth of the terminal device needs to support 100 MHz. Correspondingly, for the FR2 frequency band, the bandwidth of the terminal device needs to support 400 MHz. However, for the terminal device of the NR-light system, one of the main features is the reduction of the supported bandwidth, thereby reducing power consumption and cost.

[0072] The current cell access scheme of the NR system is as follows: The terminal obtains the search space of the Physical Downlink Control Channel (PDCCH), that is, type0 PDCCH search space and Control Resource Set (CORESET) through the received SSB, and blindly detects the PDCCH according to the type0 PDCCH search space and CORESET. In the above scheme, if the PDCCH bandwidth is large and the bandwidth supported by the low-capability terminal of the NR-light system is small, it may take a long time to detect the PDDCH, and finally the PDCCH cannot be detected, resulting in a long network access time.

[0073] The technical concept of the method in the embodiments of the present application is as follows: On the premise of being compatible with the current cell access process of the NR system, a cell access method is proposed for the NR-light terminal device, so that the NR-light terminal device can reduce the network access time. The specific solution idea is as follows: Before blindly detecting the PDCCH, the NR-light terminal device determines whether the cell supports the access of the terminal device. For example, according to the bandwidth information sent by the network device, it is determined whether the cell supports the access of the terminal device. If it is determined that the cell does not support the access of the terminal device, there is no need to blindly detect the PDCCH, and continue to search for other cells to access, which can reduce the time for the terminal device to access the cell, and at the same time does not change the current process of the NR system terminal device accessing the cell, that is, it is compatible with the current access process of the NR system.

[0074] The technical solution of the present application will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0075] Figure 2 This is a schematic diagram of a communication system applied to an embodiment of the present application. As Figure 2 shown, the communication system at least includes a network device 11 and a terminal device 12. It can be understood that in an actual communication system, there may be one or more network devices 11 and terminal devices 12, and Figure 2 only one is taken as an example here.

[0076] In Figure 2 , the network device 11 may be an access network device. For example, it may be an access device in an LTE network and its evolved network, such as an evolved base station (Evolutional Node B, abbreviated as eNB or eNodeB), or it may also include a next generation node B (gNB) in a 5G NR system, or a relay station, or a base station in a future new network system, etc.

[0077] The terminal device 12 may also be referred to as a mobile terminal, a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. Specifically, it may be a smart phone, a cellular phone, a cordless phone, a personal digital assistant (PDA) device, a handheld device with wireless communication function or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, etc. In the embodiment of the present application, the terminal device has an interface for communicating with the network device.

[0078] In the following embodiments of the present application, the NR-light terminal device is taken as an example for illustration, but the following solutions are also applicable to NR terminal devices and terminal devices of other systems, and the present application does not limit this.

[0079] Figure 3 This is a flowchart of an embodiment of a cell access method provided by the present application. As Figure 3 shown, the specific implementation steps of this embodiment include:

[0080] Step 101, the terminal device receives a first synchronization signal block SSB.

[0081] In an embodiment, the terminal device receives the first SSB sent by the network device, and the principle of the SSB is referred to the foregoing introduction.

[0082] In an embodiment, the network device may implicitly indicate the target cell supported for access through the bandwidth information included in the synchronization signal block, such as whether the NR-light terminal device can access the cell.

[0083] Step 102: The terminal device determines a target cell that supports the access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB.

[0084] Step 103: The terminal device accesses the target cell.

[0085] In one embodiment, the terminal device determines a target cell that supports the access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB sent by the network device.

[0086] For example, the PBCH in the synchronization signal block carries MIB information. The pdcch-ConfigSIB1 information field in the MIB information includes the resource control set (Control Resource Set, CORESET) #0 information of type 0 PDCCH, which is used to indicate the RBs in the frequency domain and the symbols in the time domain of type 0 PDCCH. The CORESET #0 information indicates one of the indexes in Table 4 below. According to the index, the number of RBs and symbols of CORESET #0, and the RB offset compared with the SSB are obtained. As can be seen from Table 4 below, in the case of a subcarrier spacing of 15 kHz, the bandwidth of CORESET #0 can be configured as 24, 48, or 96 RBs, corresponding to bandwidths of 5 MHz, 10 MHz, and 20 MHz.

[0087] Table 4: {SS / PBCH block, PDCCH} SCS is {15, 15} kHz, and the frequency band is the minimum channel bandwidth of 5 - 10 MHz. The set of RBs in the frequency domain and symbols in the time domain of CORESET in the type 0-PDCCH search space set

[0088]

[0089] For low-capability NR-light terminal devices, the supported bandwidth may be limited. For example, it only supports 10 MHz. When the bandwidth of CORESET #0 in the NR system is configured as 20 MHz (which can be obtained according to the number of resource blocks), then the NR-light terminal device will not be able to receive type 0 PDCCH information, and thus will not be able to receive SIB1 information, and will not be able to access the cell according to the system information of the cell.

[0090] In one embodiment, it can be explicitly indicated whether the corresponding cell allows the access of NR-light UEs through the information carried by the PBCH in the SSB. However, it is necessary to redefine the bits in the PBCH, such as reserved bits. And the currently available reserved bits are very limited.

[0091] Therefore, in the embodiments of the present application, it is possible to implicitly indicate whether the NR-light terminal device can access through the bandwidth information included in the first SSB.

[0092] In one embodiment, it is possible to implicitly indicate whether the NR-light terminal device can access through the CORESET information in the PBCH included in the first SSB.

[0093] In one embodiment, when the bandwidth indicated by the bandwidth information included in the first SSB is less than or equal to the preset bandwidth, the NR-light terminal device can determine that the cell supports the access of the terminal device, and can blindly detect the PDCCH through the type0 PDCCH search space and CORESET information, and then receive SIB1, and access the cell according to the system information of the cell.

[0094] In one embodiment, when the bandwidth indicated by the bandwidth information included in the first SSB is greater than the preset bandwidth, it implicitly indicates that the cell does not support the access of the NR-light terminal device. The NR-light terminal device does not need to try to detect the PDCCH anymore, nor receive SIB1. Specifically, the terminal device can continue to search for other SSBs until the bandwidth of the CORESET indicated by the bandwidth information included in the searched SSB is less than or equal to the preset bandwidth.

[0095] In one embodiment, the preset bandwidth can be the bandwidth supported by the current NR-light terminal device, or can also be at least one bandwidth corresponding to the NR-light system.

[0096] In the method of this embodiment, the terminal device receives the first synchronization signal block SSB; the terminal device determines the target cell that supports the access of the terminal device according to the preset bandwidth and the bandwidth information included in the first SSB, realizing that the terminal device can determine whether the cell corresponding to the first SSB is the target cell that supports the access of the terminal device according to the bandwidth information included in the first SSB and the preset bandwidth. If the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device, the terminal device does not need to blindly detect the PDCCH of the cell, saving the time to access the network, and only determining whether the cell corresponding to the first SSB is the target cell according to the preset bandwidth and the bandwidth information included in the first SSB, without adding additional signaling overhead, having a small impact on the existing NR system and low complexity.

[0097] Based on the above embodiments, step 102 may include the following specific implementation manners:

[0098] If the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, the terminal device determines that the cell corresponding to the first SSB is the target cell that supports the access of the terminal device.

[0099] If the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, the terminal device determines that the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device.

[0100] Specifically, if the bandwidth indicated by the bandwidth information included in the first SSB is less than or equal to the preset bandwidth, the terminal device determines that the cell corresponding to the first SSB is the target cell that supports the access of the terminal device. Further, the terminal device can blindly detect the PDCCH through the type0 PDCCH search space and CORESET information, and then receive SIB1, and access the cell according to the system information of the cell. If the bandwidth indicated by the bandwidth information included in the first SSB is greater than the preset bandwidth, the terminal device determines that the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device, and the terminal device does not need to blindly detect the PDCCH of the cell and subsequent operations.

[0101] In an embodiment, before the terminal device determines that the cell corresponding to the first SSB is the target cell that supports the access of the terminal device, it may further include:

[0102] The terminal device receives first indication information; the first indication information is used to indicate whether the cell corresponding to the first SSB supports the access of the terminal device;

[0103] The terminal device determines that the cell corresponding to the first SSB is the target cell that supports the access of the terminal device, which can be implemented in the following manner:

[0104] If the first indication information indicates that the cell corresponding to the first SSB supports the access of the terminal device, the terminal device determines that the cell corresponding to the first SSB is the target cell that supports the access of the terminal device.

[0105] Specifically, when the bandwidth indicated by the bandwidth information included in the first SSB is less than or equal to the preset bandwidth, the terminal device can further receive the first indication information of the network device, and determine whether the cell supports the access of the terminal device through the first indication information.

[0106] Wherein, the first indication information can be carried by the system information block.

[0107] When the bandwidth is less than or equal to the preset bandwidth, the terminal device can blindly detect the PDCCH, and then receive the system information block, such as SIB1, and a field can be added in SIB1 to carry the first indication information.

[0108] In this method, although the bandwidth indicated by the bandwidth information included in the first SSB can satisfy the NR-light terminal device to receive SIB1, the network device may not want the cell to access this terminal device. For example, in the case of cell congestion, or other bandwidth information configured in the system information does not match the bandwidth of this terminal device. For example, the bandwidth of the initial part of the bandwidth part (BWP) configured in SIB1 is greater than the bandwidth supported by this terminal device.

[0109] If the first indication information indicates that the cell corresponding to the first SSB supports the access of the terminal device, the terminal device determines that the cell corresponding to the first SSB is the target cell that supports the access of the terminal device. The terminal device receives SIB1 by receiving PDCCH information, and then accesses this target cell.

[0110] In an embodiment, if the first indication information indicates that the cell corresponding to the first SSB does not support the access of the terminal device, the terminal device determines that the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device.

[0111] In an embodiment, if the first indication information indicates that the cell corresponding to the first SSB does not support the access of the terminal device, the terminal device obtains a second SSB, and the cell corresponding to the second SSB is the target cell that supports the access of the terminal device.

[0112] Specifically, if the first indication information indicates that the cell corresponding to the first SSB does not support the access of the terminal device, the terminal device no longer attempts to detect PDCCH and receive SIB.

[0113] The first indication information can be carried by the system information block SIB, such as SIB1, without modifying the structure of the first SSB, especially the structure of the PBCH included in the first SSB, that is, without modifying the MIB information carried by the PBCH, which has less impact on the existing NR system and low complexity.

[0114] In another embodiment, when the cell corresponding to the first SSB is not the target cell that supports the access of the terminal device, that is, when the cell corresponding to the first SSB does not support the access of the terminal device, the method may further include:

[0115] The terminal device obtains a second SSB, and the cell corresponding to the second SSB is the target cell that supports the access of the terminal device.

[0116] Specifically, if the cell corresponding to the first SSB does not support the access of the terminal device, the terminal device will no longer attempt to detect the PDCCH and receive the SIB, but continue to search for and obtain other second SSBs to find a target cell that supports the access of the terminal device. Whether the cell corresponding to the first SSB supports the access of the terminal device can be directly determined by the bandwidth indicated by the bandwidth information included in the first SSB and the preset bandwidth, or further determined according to the first indication information. The embodiments of the present application do not limit this.

[0117] In the above embodiment, it is implicitly indicated whether the NR-light terminal device can access the cell through the bandwidth information included in the first SSB. Further, it can also be indicated whether the cell allows the NR-light terminal device to access through the first indication information, which can make the network more flexible in controlling the access of the NR-light terminal device to the cell.

[0118] In one embodiment, the step of "obtaining the second SSB" can be implemented in the following manner:

[0119] The terminal device determines the frequency domain position of the second SSB according to the frequency domain position of the first SSB;

[0120] The terminal device obtains the second SSB according to the frequency domain position of the second SSB.

[0121] Specifically, when the terminal device determines that the cell corresponding to the first SSB does not support the access of the terminal device, it can continue to search for the second SSB until the bandwidth indicated by the bandwidth information included in the searched second SSB is less than or equal to the preset bandwidth, or the first indication information indicates that the cell corresponding to the second SSB supports the access of the terminal device. Further, the terminal device can detect the PDCCH according to the PDCCH search space and CORESET information included in the second SSB, and then receive the SIB1, and access the cell according to the system information of the cell.

[0122] To reduce the search time of the terminal device and the access delay to the network, the terminal device determines the frequency domain position of the second SSB according to the currently known frequency domain position of the first SSB, and then obtains the second SSB according to the frequency domain position of the second SSB.

[0123] For example, as Figure 4 shown, the terminal device searches for the second SSB around the frequency domain position of the first SSB, that is, searches for the second SSB within the range of frequencies greater than and / or less than the frequency of the first SSB.

[0124] In one embodiment, the frequency domain position of the second SSB can be determined in the following several ways:

[0125] One implementation method:

[0126] The terminal device determines the frequency-domain position of the second SSB according to the frequency-domain position of the first SSB and a preset frequency-domain offset.

[0127] Specifically, the frequency-domain position of the first SSB can be obtained through the synchronization raster (see the introduction at the synchronization raster), and then, based on the frequency-domain position of the first SSB and the preset frequency-domain offset, the frequency-domain position of the second SSB is obtained.

[0128] As Figure 5 shown, for the network device, there is a preset frequency-domain offset between the first SSB indicating non-support for the access of the NR-light terminal device and the second SSB indicating support for the access of the NR-light terminal device. When the NR-light terminal device detects the first SSB and determines that the cell corresponding to the first SSB does not support the access of this terminal device, it determines the frequency-domain position where the second SSB corresponding to the cell supporting the access of the NR-light terminal device is located according to the preset frequency-domain offset, such as the position of the synchronization raster corresponding to the second SSB. Figure 5 In [the figure] is to search downward for the second SSB. In other embodiments, it can also be to search upward for the second SSB, and this application does not limit this.

[0129] In one embodiment, on the basis of the preset frequency-domain offset, the network device can also give the search direction through indication information, such as whether it is higher or lower than the frequency of the first SSB, that is, the range relative to the frequency-domain position of the first SSB.

[0130] In one embodiment, the preset frequency-domain offset can be the number of synchronization rasters.

[0131] In one embodiment, the preset frequency-domain offset can be a frequency-domain offset value, or multiple values, and this application embodiment does not limit this.

[0132] In the above specific implementation manner, it is implicitly indicated whether the NR-light terminal device can access the cell through the bandwidth information included in the first SSB. If the cell corresponding to the first SSB does not support the access of this terminal device, the frequency-domain position of the second SSB corresponding to the cell supporting the access of the NR-light terminal device is further determined through the preset frequency-domain offset information, which can reduce the complexity and power consumption of the NR-light terminal device searching for the second SSB, and reduce the access delay. Moreover, in this method, there is no need to introduce indication information, the complexity is low, and the impact on the existing NR system is small, and it can be compatible with the existing NR system.

[0133] Another implementation method:

[0134] The terminal device determines the frequency-domain position of the second SSB according to the frequency-domain position of the first SSB and the second indication information; the second indication information is used to indicate the relationship between the frequency-domain position of the second SSB and the frequency-domain position of the first SSB.

[0135] In one embodiment, before determining the frequency-domain position of the second SSB, the terminal device may obtain the second indication information from the network device.

[0136] Wherein, the second indication information is carried in the physical broadcast channel PBCH included in the first SSB, or carried in the system information block SIB.

[0137] Specifically, the second indication information is used to indicate the relationship between the frequency-domain position of the second SSB corresponding to the cell that can support the access of the NR-light terminal device and the frequency-domain position of the first SSB, for example, indicating the range information of the frequency-domain position of the second SSB, or the frequency-domain offset between the second SSB and the first SSB, that is, the offset between the frequency-domain position of the second SSB and the frequency-domain position of the first SSB.

[0138] For example, use the second indication information (such as 1 bit) to indicate whether the frequency of the second SSB is higher or lower than the frequency of the first SSB. After obtaining the second indication information, the NR-light terminal device can use the frequency-domain position of the first SSB as the starting point and continue to search for the second SSB in the corresponding frequency range. As Figure 4 shown, the terminal device searches for the second SSB in the range below the frequency of the first SSB, or in the range above the frequency of the first SSB. For example, when the frequency domain range is 3 GHz - 24 GHz and the synchronization raster interval is 1.44 MHz, the terminal device searches for the second SSB according to the position of the synchronization raster of the first SSB. When detecting an SSB, determine whether the bandwidth indicated by the bandwidth information included in the SSB is greater than the preset bandwidth. If not, determine that the cell corresponding to the SSB supports the access of the terminal device, or further determine that the cell corresponding to the SSB supports the access of the terminal device according to the first indication information

[0139] In one embodiment, the frequency range of the second SSB may also be indicated by the second indication information, such as a MHz - b MHz.

[0140] In one embodiment, the second indication information may also indicate more accurate frequency-domain position information of the second SSB of the cell that supports the access of the NR-light terminal device. For example, specifically indicate the frequency-domain interval between the second SSB and the current first SSB, such as the number of synchronization rasters of the interval. This method may require more bit fields.

[0141] The above second indication information may be indicated by a specific bit field in the PBCH included in the SSB, or by a specific bit field in other information, such as the system information block SIB.

[0142] In the above specific implementation manner, when it is determined that the cell corresponding to the current first SSB does not support the access of the terminal device, further, through the second indication information, the frequency domain position information of the second SSB corresponding to the cell that can support its access is indicated, which can reduce the blind detection of the NR-light terminal device, reduce the complexity and power consumption of the NR-light terminal device searching for the SSB, and reduce the access delay.

[0143] In one embodiment, as Figure 6 shown, the terminal device receives the first SSB, obtains the CORESET information of the type0 PDCCH carried in the PBCH included in the first SSB, and can determine whether the cell corresponding to the first SSB supports the access of the terminal device according to the bandwidth indicated by the CORESET information and the preset bandwidth. For example, if the bandwidth indicated by the CORESET information is less than or equal to the preset bandwidth, it is determined that the cell supports the access of the NR-light terminal device; if the bandwidth indicated by the CORESET information is greater than the preset bandwidth, it is determined that the cell does not support the access of the NR-light terminal device.

[0144] In one embodiment, as Figure 7 shown, the terminal device receives the first SSB, obtains the CORESET information of the type0 PDCCH carried in the PBCH included in the first SSB, and can determine whether the cell corresponding to the first SSB supports the access of the terminal device according to the bandwidth indicated by the CORESET information and the preset bandwidth. For example, if the bandwidth indicated by the CORESET information is greater than the preset bandwidth, it is determined that the cell does not support the access of the NR-light terminal device; if the bandwidth indicated by the CORESET information is less than or equal to the preset bandwidth, then the SIB1 is received through the type0 PDCCH, and it is determined whether the indication information in the SIB1 indicates that the cell supports the access of the NR-light terminal device. If the indication information indicates that the cell supports the access of the NR-light terminal device, it is determined that the cell supports the access of the NR-light terminal device; if the indication information indicates that the cell does not support the access of the NR-light terminal device, it is determined that the cell does not support the access of the NR-light terminal device.

[0145] In one embodiment, as Figure 8As shown in the figure, the terminal device receives the first SSB, obtains the CORESET information of the type0 PDCCH carried in the PBCH included in the first SSB, and can determine whether the cell corresponding to the first SSB supports the access of the terminal device according to the bandwidth indicated by the CORESET information and the preset bandwidth. For example, if the bandwidth indicated by the CORESET information is less than or equal to the preset bandwidth, it is determined that the cell supports the access of the NR-light terminal device; if the bandwidth indicated by the CORESET information is greater than the preset bandwidth, it is determined that the cell does not support the access of the NR-light terminal device; if the indication information indicates that the cell does not support the access of the NR-light terminal device, the frequency domain position of the second SSB is determined, that is, the second SSB is obtained through the frequency domain position of the second SSB, and the cell corresponding to the second SSB is the target cell that supports the access of the NR-light terminal device.

[0146] The embodiment of the present application also provides a cell access method. The specific implementation steps of this embodiment include:

[0147] The network device sends a first synchronization signal block SSB, and the first SSB includes bandwidth information; the bandwidth information and the preset bandwidth are used to indicate the target cell that supports access.

[0148] In one embodiment, the network device can implicitly indicate the target cell that supports access through the bandwidth information included in the first SSB. For example, it indicates to the NR-light terminal device whether the cell corresponding to the first SSB is the target cell that supports access.

[0149] In one embodiment, as Figure 9 shown in the figure, the network device first obtains the first SSB, and the first SSB includes bandwidth information, which is used to indicate the target cell that supports access. The terminal device can determine the target cell that supports the access of the terminal device according to the bandwidth information and the preset bandwidth.

[0150] In one embodiment, if the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, the cell corresponding to the first SSB is the target cell; if the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, the cell corresponding to the first SSB is not the target cell.

[0151] In one embodiment, when the bandwidth indicated by the bandwidth information included in the first SSB is less than or equal to the preset bandwidth, the NR-light terminal device can determine that the cell supports the access of the terminal device, and can blindly detect the PDCCH through the type0 PDCCH search space and the CORESET information, and then receive the SIB1, and access the cell according to the system information of the cell.

[0152] In one embodiment, when the bandwidth information included in the first SSB indicates a bandwidth greater than a preset bandwidth, it implicitly indicates that the cell does not support the access of NR-light terminal devices. The NR-light terminal device does not need to try to detect the PDCCH anymore and receive SIB1. Specifically, the terminal device can continue to search for other SSBs until the bandwidth of the CORESET indicated by the bandwidth information included in the searched SSB is less than or equal to the preset bandwidth.

[0153] In one embodiment, the preset bandwidth can be the bandwidth supported by the current NR-light terminal device, or can also be at least one bandwidth corresponding to the NR-light system.

[0154] In one embodiment, after the network device sends the first synchronization signal block SSB, it further includes:

[0155] The network device sends first indication information; the first indication information is used to indicate whether the cell corresponding to the first SSB is a target cell supporting access.

[0156] Specifically, in the case where the bandwidth indicated by the bandwidth information included in the first SSB is less than or equal to the preset bandwidth, the network device can further send the first indication information to indicate whether the cell corresponding to the first SSB is a target cell supporting access, and the terminal device can further receive the first indication information of the network device and determine whether the cell supports the access of the terminal device through the first indication information.

[0157] In one embodiment, when the cell corresponding to the first SSB is not a target cell supporting the access of the terminal device, that is, the cell corresponding to the first SSB does not support the access of the terminal device, the method of this embodiment can further include:

[0158] The network device sends a second SSB, and the cell corresponding to the second SSB is a target cell supporting access.

[0159] In one embodiment, the method of this embodiment can further include:

[0160] The network device sends second indication information, and the second indication information is used to indicate the relationship between the frequency domain position of the second SSB and the frequency domain position of the first SSB.

[0161] In one embodiment, the second indication information is used to indicate: the range of the frequency domain position of the second SSB relative to the frequency domain position of the first SSB, and / or, the frequency domain offset between the second SSB and the first SSB.

[0162] In one embodiment, the frequency domain offset includes the number of synchronization rasters.

[0163] In one embodiment, the system information block SIB carries the first indication information.

[0164] In one embodiment, the second indication information is carried in the physical broadcast channel PBCH included in the first SSB, or the second indication information is carried in the system information block SIB.

[0165] In one embodiment, the control resource set CORESET information included in the first SSB contains bandwidth information.

[0166] In the method of this embodiment, the network device sends the first synchronization signal block SSB; the bandwidth information included in the first SSB is used to indicate the target cell that supports access. In the above solution, the target cell that supports access is determined according to the bandwidth information included in the first SSB and the preset bandwidth, without adding additional signaling overhead, having less impact on the existing NR system, lower complexity, and if the cell corresponding to the first SSB is not the target cell that supports access, the terminal device does not need to perform blind detection on the PDCCH of this cell, saving the time for accessing the network.

[0167] Figure 10 It is a schematic structural diagram of Embodiment 1 of the terminal device provided in this application, as Figure 10 shown, the terminal device includes:

[0168] A receiving module 110, configured to receive the first synchronization signal block SSB;

[0169] A determining module 111, configured to determine a target cell that supports access by the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB;

[0170] A processing module 112, configured to access the target cell.

[0171] In a possible implementation manner, the determining module 111 is specifically configured to:

[0172] If the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, determine that the cell corresponding to the first SSB is the target cell;

[0173] If the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, determine that the cell corresponding to the first SSB is not the target cell.

[0174] In a possible implementation manner, the receiving module 110 is further configured to:

[0175] Receive first indication information; the first indication information is used to indicate whether the cell corresponding to the first SSB supports access by the terminal device;

[0176] The determining module 111 is specifically configured to:

[0177] If the first indication information indicates that the cell corresponding to the first SSB supports the access of the terminal device, determine the cell corresponding to the first SSB as the target cell.

[0178] In a possible implementation manner, the determining module 111 is specifically configured to:

[0179] If the first indication information indicates that the cell corresponding to the first SSB does not support the access of the terminal device, determine that the cell corresponding to the first SSB is not the target cell.

[0180] In a possible implementation manner, it further includes:

[0181] An obtaining module, configured to obtain a second SSB, where the cell corresponding to the second SSB is the target cell that supports the access of the terminal device.

[0182] In a possible implementation manner, the obtaining module includes:

[0183] A determining subunit, configured to determine the frequency-domain position of the second SSB according to the frequency-domain position of the first SSB;

[0184] An obtaining subunit, configured to obtain the second SSB according to the frequency-domain position of the second SSB.

[0185] In a possible implementation manner, the determining subunit is configured to:

[0186] Determine the frequency-domain position of the second SSB according to the frequency-domain position of the first SSB and a preset frequency-domain offset; or,

[0187] Determine the frequency-domain position of the second SSB according to the frequency-domain position of the first SSB and second indication information; the second indication information is used to indicate the relationship between the frequency-domain position of the second SSB and the frequency-domain position of the first SSB.

[0188] In a possible implementation manner, the second indication information is used to indicate: the range of the frequency-domain position of the second SSB relative to the frequency-domain position of the first SSB, and / or, the frequency-domain offset between the second SSB and the first SSB.

[0189] In a possible implementation manner, the frequency-domain offset includes the number of synchronization raster.

[0190] In a possible implementation manner, the system information block SIB carries the first indication information.

[0191] In a possible implementation, the second indication information is carried in the physical broadcast channel PBCH included in the first SSB, or the second indication information is carried in the system information block SIB.

[0192] In a possible implementation, the control resource set CORESET information included in the first SSB contains the bandwidth information.

[0193] The terminal device in this embodiment is used to implement the technical solution on the terminal device side. For the implementation principle and technical effects, refer to the method embodiment on the terminal device side described above, and details are not elaborated here.

[0194] Figure 11 The following is the schematic structural diagram of the first embodiment of the network device provided by this application. As Figure 11 shown, the network device includes:

[0195] A first sending module 210, configured to send a first synchronization signal block SSB, where the first SSB contains bandwidth information; the bandwidth information and a preset bandwidth are used to indicate a target cell that supports access.

[0196] In a possible implementation, if the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, the cell corresponding to the first SSB is the target cell; if the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, the cell corresponding to the first SSB is not the target cell.

[0197] In a possible implementation, the first sending module 210 is further configured to:

[0198] Send first indication information; the first indication information is used to indicate whether the cell corresponding to the first SSB is a target cell that supports access.

[0199] In a possible implementation, it further includes:

[0200] A second sending module 211, configured to send a second SSB, where the cell corresponding to the second SSB is a target cell that supports access.

[0201] In a possible implementation, the sending module 211 is further configured to:

[0202] Send second indication information, where the second indication information is used to indicate the relationship between the frequency domain position of the second SSB and the frequency domain position of the first SSB.

[0203] In a possible implementation, the second indication information is used to indicate: the range of the frequency domain position of the second SSB relative to the frequency domain position of the first SSB, and / or, the frequency domain offset between the second SSB and the first SSB.

[0204] In a possible implementation, the frequency-domain offset includes the number of synchronization rasters.

[0205] In a possible implementation, the system information block SIB carries the first indication information.

[0206] In a possible implementation, the second indication information is carried in the physical broadcast channel PBCH included in the first SSB, or the system information block SIB carries the second indication information.

[0207] In a possible implementation, the control resource set CORESET information included in the first SSB contains the bandwidth information.

[0208] The network device in this embodiment is used to implement the technical solution on the network device side. For its implementation principle and technical effects, refer to the foregoing method embodiment on the network device side, which will not be elaborated here.

[0209] Figure 12 It is a schematic structural diagram of Embodiment 5 of the terminal device provided by this application. As Figure 12 shown, the terminal device includes:

[0210] A processor 311, a memory 312, and an interface 313 for communicating with a network device;

[0211] The memory 312 stores computer-executable instructions;

[0212] The processor 311 executes the computer-executable instructions stored in the memory, so that the processor 311 executes the technical solution on the terminal device side in any of the foregoing method embodiments.

[0213] Figure 12 For a simple design of the terminal device, the embodiments of this application do not limit the number of processors and memories in the terminal device. Figure 12 Only the number 1 is used as an example for illustration.

[0214] Figure 13 It is a schematic structural diagram of Embodiment 2 of the network device provided by this application. As Figure 13 shown, the network device includes:

[0215] A processor 411, a memory 412, and an interface 413 for communicating with a terminal device;

[0216] The memory 412 stores computer-executable instructions;

[0217] The processor 411 executes the computer-executable instructions stored in the memory 412, so that the processor 411 executes the technical solutions on the network device side in any of the foregoing method embodiments.

[0218] Figure 13 For a simple design of a network device, the embodiments of the present application do not limit the number of processors and memories in the network device. Figure 13 Only the number 1 is used as an example for illustration.

[0219] In the above Figure 12 shown terminal device and Figure 13 In a specific implementation of the described network device, the memory, the processor, and the interface can be connected through a bus. In one embodiment, the memory can be integrated inside the processor.

[0220] The embodiments of the present application further provide a computer-readable storage medium. Computer-executable instructions are stored in the computer-readable storage medium. When the computer-executable instructions are executed by a processor, they are used to implement the technical solutions of the terminal device in any of the foregoing method embodiments.

[0221] The embodiments of the present application further provide a computer-readable storage medium. Computer-executable instructions are stored in the computer-readable storage medium. When the computer-executable instructions are executed by a processor, they are used to implement the technical solutions of the network device in any of the foregoing method embodiments.

[0222] The embodiments of the present application further provide a program. When the program is executed by a processor, it is used to execute the technical solutions of the terminal device in any of the foregoing method embodiments.

[0223] The embodiments of the present application further provide a program. When the program is executed by a processor, it is used to execute the technical solutions of the network device in any of the foregoing method embodiments.

[0224] In one embodiment, the foregoing processor may be a chip.

[0225] The embodiments of the present application further provide a computer program product, including program instructions. The program instructions are used to implement the technical solutions of the terminal device in any of the foregoing method embodiments.

[0226] The embodiments of the present application further provide a computer program product, including program instructions. The program instructions are used to implement the technical solutions of the network device in any of the foregoing method embodiments.

[0227] The embodiments of the present application further provide a chip, including: a processing module and a communication interface. The processing module can execute the technical solutions on the terminal device side in any of the foregoing method embodiments.

[0228] Further, the chip further includes a storage module (e.g., a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solutions on the terminal device side in any of the foregoing method embodiments.

[0229] An embodiment of the present application further provides a chip, including: a processing module and a communication interface, and the processing module can execute the technical solutions on the network device side in any of the foregoing method embodiments.

[0230] Further, the chip further includes a storage module (e.g., a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solutions on the network device side in any of the foregoing method embodiments.

[0231] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation. For example, multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the modules can be in electrical, mechanical or other forms.

[0232] In the specific implementation of the foregoing terminal device and network device, it should be understood that the processor can be a central processing unit (English: Central Processing Unit, abbreviated: CPU), and can also be other general-purpose processors, digital signal processors (English: Digital Signal Processor, abbreviated: DSP), application-specific integrated circuits (English: ApplicationSpecific Integrated Circuit, abbreviated: ASIC), etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the present application can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0233] All or part of the steps of the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a readable memory. When the program is executed, it performs the steps of the above method embodiments; and the foregoing memory (storage medium) includes: read-only memory (abbreviation: ROM), RAM, flash memory, hard disk, solid state drive, magnetic tape, floppy disk, optical disc, and any combination thereof.

Claims

1. A cell access method, characterized in that, comprising: The terminal device receives a first synchronization signal block SSB; The terminal device determines a target cell that supports the terminal device to access according to a preset bandwidth and the bandwidth information in the first SSB; The terminal device accesses the target cell; Wherein, the terminal device determines a target cell that supports the terminal device to access according to a preset bandwidth and the bandwidth information included in the first SSB, including: If the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, the terminal device determines the cell corresponding to the first SSB as the target cell; If the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, the terminal device determines that the cell corresponding to the first SSB is not the target cell; Wherein, after the terminal device determines that the cell corresponding to the first SSB is not the target cell, it further includes: The terminal device obtains a second SSB, and the cell corresponding to the second SSB is the target cell that supports the terminal device to access; Wherein, the terminal device obtains the second SSB, including: The terminal device determines the frequency domain position of the second SSB according to the frequency domain position of the first SSB; The terminal device obtains the second SSB according to the frequency domain position of the second SSB.

2. The method according to claim 1, characterized in that, The terminal device determines the frequency domain position of the second SSB according to the frequency domain position of the first SSB, including: The terminal device determines the frequency domain position of the second SSB according to the frequency domain position of the first SSB and a preset frequency domain offset; or, The terminal device determines the frequency domain position of the second SSB according to the frequency domain position of the first SSB and second indication information; the second indication information is used to indicate the relationship between the frequency domain position of the second SSB and the frequency domain position of the first SSB.

3. The method according to claim 2, characterized in that, The second indication information is used to indicate: the range of the frequency domain position of the second SSB relative to the frequency domain position of the first SSB, and / or, the frequency domain offset between the second SSB and the first SSB.

4. The method according to claim 2, characterized in that, The frequency domain offset includes the number of synchronization grids.

5. The method according to any one of claims 2-4, characterized in that, The second indication information is carried in the physical broadcast channel PBCH included in the first SSB, or the system information block SIB carries the second indication information.

6. The method according to any one of claims 1-4, characterized in that, The control resource set CORESET information included in the first SSB contains the bandwidth information.

7. A cell access method, characterized in that, comprising: The network device sends a first synchronization signal block SSB, and the first SSB contains bandwidth information; the bandwidth information and a preset bandwidth are used to indicate a target cell that supports access; Wherein, if the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, the cell corresponding to the first SSB is the target cell; if the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, the cell corresponding to the first SSB is not the target cell; Wherein, the method further includes: The network device sends a second SSB, and the cell corresponding to the second SSB is the target cell supporting access; Wherein, the method further includes: The network device sends second indication information, and the second indication information is used to indicate the relationship between the frequency domain position of the second SSB and the frequency domain position of the first SSB.

8. The method according to claim 7, Characterized in that, The second indication information is used to indicate: the range of the frequency domain position of the second SSB relative to the frequency domain position of the first SSB, and / or, the frequency domain offset between the second SSB and the first SSB.

9. The method according to claim 8, Characterized in that, The frequency domain offset includes the number of synchronization grids.

10. The method according to any one of claims 7-9, Characterized in that, The second indication information is carried in the physical broadcast channel PBCH included in the first SSB, or the system information block SIB carries the second indication information.

11. The method according to any one of claims 7-9, Characterized in that, The control resource set CORESET information included in the first SSB contains the bandwidth information.

12. A terminal device, Characterized in that, Comprising: A receiving module, configured to receive a first synchronization signal block SSB; A determining module, configured to determine a target cell supporting access of the terminal device according to a preset bandwidth and the bandwidth information included in the first SSB; A processing module is configured to access the target cell; Wherein, the determining module is specifically configured to: If the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, determine that the cell corresponding to the first SSB is the target cell; If the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, determine that the cell corresponding to the first SSB is not the target cell; Wherein, the terminal device further includes: An obtaining module, configured to obtain a second SSB, and the cell corresponding to the second SSB is the target cell supporting access of the terminal device; Wherein, the obtaining module includes: A determining subunit, configured to determine the frequency domain position of the second SSB according to the frequency domain position of the first SSB; An obtaining subunit, configured to obtain the second SSB according to the frequency domain position of the second SSB.

13. The terminal device according to claim 12, Characterized in that, The determining subunit is configured to: Determine the frequency domain position of the second SSB according to the frequency domain position of the first SSB and a preset frequency domain offset; or, Determine the frequency domain position of the second SSB according to the frequency domain position of the first SSB and the second indication information; The second indication information is used to indicate the relationship between the frequency domain position of the second SSB and the frequency domain position of the first SSB.

14. The terminal device according to claim 13, It is characterized in that the second indication information is used to indicate: the range of the frequency-domain position of the second SSB relative to the frequency-domain position of the first SSB, and / or, the frequency-domain offset between the second SSB and the first SSB.

15. The terminal device according to claim 13, It is characterized in that the frequency-domain offset includes the number of synchronization grids.

16. The terminal device according to any one of claims 13-15, It is characterized in that the physical broadcast channel PBCH included in the first SSB carries the second indication information, or the system information block SIB carries the second indication information.

17. The terminal device according to any one of claims 12-15, It is characterized in that the control resource set CORESET information included in the first SSB contains the bandwidth information.

18. A network device, It is characterized in that comprises: A first sending module, configured to send a first synchronization signal block SSB, the first SSB containing bandwidth information; the bandwidth information and a preset bandwidth are used to indicate a target cell supporting access; wherein, if the bandwidth indicated by the bandwidth information is less than or equal to the preset bandwidth, the cell corresponding to the first SSB is the target cell; if the bandwidth indicated by the bandwidth information is greater than the preset bandwidth, the cell corresponding to the first SSB is not the target cell; wherein, the network device further comprises: A second sending module, configured to send a second SSB, the cell corresponding to the second SSB being the target cell supporting access; wherein, the second sending module is further configured to: send second indication information, the second indication information being used to indicate the relationship between the frequency-domain position of the second SSB and the frequency-domain position of the first SSB.

19. The network device according to claim 18, It is characterized in that the second indication information is used to indicate: the range of the frequency-domain position of the second SSB relative to the frequency-domain position of the first SSB, and / or, the frequency-domain offset between the second SSB and the first SSB.

20. The network device according to claim 19, It is characterized in that the frequency-domain offset includes the number of synchronization grids.

21. The network device according to any one of claims 18-20, It is characterized in that the physical broadcast channel PBCH included in the first SSB carries the second indication information, or, the system information block SIB carries the second indication information.

22. The network device according to any one of claims 18-20, It is characterized in that the control resource set CORESET information included in the first SSB contains the bandwidth information.

23. A terminal device, It is characterized in that comprises: A processor, a memory, and an interface for communicating with a network device; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, so that the processor executes the cell access method according to any one of claims 1 to 6.

24. A network device, It is characterized in that comprises: A processor, a memory, and an interface for communicating with a terminal device; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, such that the processor executes the cell access method according to any one of claims 7 to 11.

25. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores computer-executable instructions, which are used to implement the cell access method according to any one of claims 1 to 6 when being executed by a processor.

26. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores computer-executable instructions, which are used to implement the cell access method according to any one of claims 7 to 11 when being executed by a processor.

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