Cell indication method, terminal device and network device

Abstract

The embodiments of the present application relate to the technical field of communications. Provided are a cell indication method, a terminal device and a network device. The method comprises: a network device sending first indication information to a terminal device, wherein the terminal device may be, for example, a terminal device supporting R19; and then, the terminal device determining, on the basis of the first indication information, whether a first cell can be camped on and / or accessed. In this way, whether terminal devices supporting downlink coverage enhancement or terminal devices not supporting downlink coverage enhancement can all determine whether the terminal devices can camp on corresponding cells, and / or, determine whether the terminal devices can access corresponding cells, so that the terminal devices can effectively determine cell information on the basis of introducing downlink coverage enhancement technology.

Description

Cell indication method, terminal device and network device

[0001] The present application claims priority to the Chinese patent application No. 202411400880.1, filed on September 30, 2024, and entitled "Cell indication method, terminal device and network device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a cell indication method, a terminal device and a network device. BACKGROUND

[0003] NTN is a kind of communication network which does not rely on traditional ground infrastructure (such as land-based cellular towers or fiber optic cables) completely, aiming to expand the coverage of communication network.

[0004] In the communication scenario of NTN, some downlink coverage enhancement strategies are introduced at present, for example, a long SSB period can be used, a wide beam can be set for transmitting downlink common channels, and a narrow beam can be set for transmitting uplink and downlink dedicated channels, etc. Then there will be cells supporting downlink coverage enhancement and cells not supporting downlink coverage enhancement, and there will be terminal devices supporting downlink coverage enhancement and terminal devices not supporting downlink coverage enhancement.

[0005] Then how does the terminal device determine the cell situation, which becomes a problem that needs to be solved urgently. SUMMARY

[0006] The embodiments of the present application provide a cell indication method, a terminal device and a network device, which are applied to the field of terminal technology, so that the terminal device can effectively determine whether the cell can be camped on, whether the cell can be accessed and the like.

[0007] In a first aspect, the embodiments of the present application provide a cell indication method, which is applied to a terminal device. The terminal device in the present application may, for example, be a terminal device supporting R19. The method comprises:

[0008] receiving first indication information sent by a network device; and then determining whether a first cell can be camped on and / or can be accessed according to the first indication information.

[0009] In this way, the network device can send the first indication information to the terminal device, so that whether the terminal device supporting downlink coverage enhancement or the terminal device not supporting downlink coverage enhancement can determine whether it can be camped on the corresponding cell and / or determine whether it can access the corresponding cell, thereby making the terminal device can effectively determine the cell information on the basis of introducing the downlink coverage enhancement technology.

[0010] In the present application, the implementation of downlink coverage enhancement includes at least one of the following: lengthening the period of SSB, setting a wide beam for transmitting a downlink common channel, setting a narrow beam for transmitting an uplink and downlink dedicated channel, and setting a narrow beam for transmitting a common channel and a dedicated channel.

[0011] In a possible implementation, the first indication information includes a first field, and the first field is used to indicate at least one of the following: forbidden, not forbidden, or not allowed to access.

[0012] In a possible implementation, in the case that the first field indicates forbidden, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on by the first beam of the first cell.

[0013] In a possible implementation, in the case that the first field indicates not allowed to access, the first indication information is used to indicate that the first cell cannot be accessed or the first beam of the first cell cannot be accessed.

[0014] In this way, the state of the cell can be indicated by the first field, so that the terminal device can effectively determine whether the first cell can be camped on and / or can be accessed.

[0015] In a possible implementation, the first indication information includes a second field, and the second field is used to indicate that only a downlink common channel is transmitted, for example, can indicate that the first cell is only used to transmit a downlink common channel, and / or can indicate that the first beam in the first cell is only used to transmit a downlink common channel.

[0016] The first indication information is used to indicate that the first cell cannot be accessed and / or the first beam of the first cell cannot be accessed.

[0017] In this way, by indicating that the first cell and / or the first beam is only used to transmit a downlink common channel through the second field, the terminal device can be effectively indicated that the first cell is a cell that cannot be accessed.

[0018] In a possible implementation, the first indication information includes a third field, and the third field is used to indicate whether the first cell can be accessed.

[0019] In the case that the third field indicates that the first cell cannot be accessed, the first indication information is used to indicate that the first cell cannot be accessed and / or the first beam of the first cell cannot be accessed.

[0020] In this way, by indicating whether the first cell can be accessed through the third field, the terminal device can effectively determine the access status of the first cell and / or the first beam.

[0021] In a possible implementation, the first indication information includes a fourth field, and the fourth field is used to indicate that the first beam of the first cell is in a first state, in which the first beam is available for initial access but unavailable for data transmission.

[0022] The first indication information is used to indicate that the first cell is unavailable for data transmission and / or the first beam of the first cell is unavailable for data transmission.

[0023] In this way, the fourth field is used to indicate that the first beam is in the N2 state, so that the terminal device can be effectively indicated that the first cell is a cell that can be accessed but cannot be used for data transmission.

[0024] In a possible implementation, the first indication information includes a fifth field and a sixth field.

[0025] The fifth field is used to indicate whether the cell is prohibited for a terminal device supporting downlink coverage enhancement.

[0026] The sixth field is used to indicate whether the cell is prohibited for a terminal device not supporting downlink coverage enhancement.

[0027] In this way, different fields can be set for the UE supporting downlink coverage enhancement and the UE not supporting downlink coverage enhancement, respectively, to indicate whether the cell is prohibited for different types of UEs, and then the different types of UEs can effectively determine the state of the cell by checking the corresponding fields.

[0028] In a possible implementation, the sixth field is a field used to indicate whether the cell is prohibited for a terminal device supporting non-terrestrial network (NTN) function.

[0029] In this way, the field used to indicate whether the cell is prohibited for the terminal device supporting the NTN function can be reused to indicate the cell information for the UE not supporting downlink coverage enhancement, so as to reduce signaling overhead.

[0030] In a possible implementation, when the terminal device does not support downlink coverage enhancement, the first indication information further includes a synchronization signal and physical broadcast channel block (SSB) period corresponding to the first cell or the first beam of the first cell.

[0031] If the SSB period is less than or equal to a first threshold, the first indication information is used to indicate that the first cell is available for access and / or the first beam is available for access.

[0032] If the SSB period is greater than the first threshold, the first indication information is used to indicate that the first cell is not available for camping and / or the first cell cannot be camped on the first cell through the first beam of the first cell.

[0033] In this way, the cell condition can be implicitly indicated to the UE not supporting downlink coverage enhancement through the SSB period, so as to effectively reduce the signaling overhead.

[0034] In a possible implementation, in the case that the terminal device does not support downlink coverage enhancement, the first indication information is indicated through the uplink configuration information.

[0035] In the case that the uplink configuration information is empty or not configured, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam of the first cell.

[0036] In this way, the cell condition can be implicitly indicated to the UE not supporting downlink coverage enhancement through the uplink configuration information, so as to effectively reduce the signaling overhead.

[0037] In a possible implementation, the first field is a field used to indicate whether the cell is prohibited for the terminal device supporting NTN function.

[0038] In a possible implementation, the first indication information further includes a seventh field; when the first indication information includes the seventh field, the terminal device supporting downlink coverage enhancement ignores the first field.

[0039] If the seventh field indicates not prohibited, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible.

[0040] If the seventh field indicates prohibited, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam of the first cell.

[0041] In this way, the cell condition can be indicated to different types of UEs through the multi-level field.

[0042] In a possible implementation, the first indication information includes a first cell list of excluded cells.

[0043] In the case that the first cell is included in the first cell list, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam of the first cell.

[0044] In a possible implementation, the first indication information includes a second cell list of allowed cells.

[0045] In the case that the first cell is included in the second cell list, the first indication information is used to indicate that the first cell is accessible and / or the first beam of the first cell is accessible.

[0046] In this way, the terminal device can be effectively indicated whether the corresponding cell can be accessed through the cell list.

[0047] In a possible implementation, in a case where the first cell is a cell that is residable but not accessible, or in a case where the first cell is a cell that is residable, accessible but not capable of transmitting data, if the terminal device has an uplink demand, the first cell is not selected in the cell selection process or the cell state of the first cell is determined to be forbidden. In this way, the terminal device can be effectively prevented from selecting a cell that is incapable of initiating access and / or camping, so as to effectively improve the access success rate of the terminal device.

[0048] In a possible implementation, in a case where the first cell is a cell that is residable but not accessible, or in a case where the first cell is a cell that is residable, accessible but not capable of transmitting data, the method further includes:

[0049] If the terminal device has an uplink demand, the first offset of the first cell is applied in the process of selecting a cell according to the cell selection criterion and the reselection criterion.

[0050] In this way, the terminal device can be as much as possible to avoid selecting a cell that is incapable of initiating access and / or camping, so as to effectively improve the access success rate of the terminal device.

[0051] In a possible implementation, in a case where the first cell is a cell that is residable but not accessible, or in a case where the first cell is a cell that is residable, accessible but not capable of transmitting data, if the terminal device has no uplink demand, the terminal device camps on the first cell.

[0052] After camping on the first cell, if the terminal device has an uplink demand, and / or the first beam is adjusted to a beam that is only used for transmitting a downlink common channel, at least one of the following is performed: neighbor cell measurement, cell reselection, excluding the first cell as a candidate for cell selection or cell reselection.

[0053] In a possible implementation, in a case where the first cell is a cell that is residable, accessible but not capable of transmitting data, the method further includes:

[0054] Initiating random access to the first cell;

[0055] In the random access process, a first request is sent to the network device, the first request being used to indicate that the terminal device has data to be transmitted; and / or, in the random access process, small packet data transmission (SDT) is performed.

[0056] In a possible implementation, the first indication information further includes first information of a neighboring cell.

[0057] The first information includes at least one of the following: an SSB offset of the neighboring cell from the first cell, indication information of whether an SSB period of the neighboring cell is extended, a maximum extension time of the SSB period of the neighboring cell, the SSB period of the neighboring cell, and the SSB offset of the neighboring cell from the first cell.

[0058] In a second aspect, the present application provides a cell indication method applied to a network device. The method includes:

[0059] The first indication information is used to indicate whether the first cell is residable and / or accessible.

[0060] In a possible implementation, the first indication information includes a first field, and the first field is used to indicate at least one of the following: forbidden, not forbidden, or not allowed to access.

[0061] In a possible implementation, when the first field indicates forbidden, the first indication information is used to indicate that the first cell is not residable and / or not residable in the first cell through a first beam of the first cell.

[0062] In a possible implementation, when the first field indicates not allowed to access, the first indication information is used to indicate that the first cell is not accessible or a first beam of the first cell is not accessible.

[0063] In a possible implementation, the first indication information includes a second field, and the second field is used to indicate that the first cell is only used for transmitting a downlink common channel.

[0064] The first indication information is used to indicate that the first cell is not accessible and / or the first beam of the first cell is not accessible.

[0065] In a possible implementation, the first indication information includes a third field, and the third field is used to indicate whether the first cell is accessible.

[0066] When the third field indicates not accessible, the first indication information is used to indicate that the first cell is not accessible and / or the first beam of the first cell is not accessible.

[0067] In a possible implementation, the first indication information includes a fourth field, and the fourth field is used to indicate that the first beam of the first cell is in a first state, and in the first state, the first beam is available for initial access but not available for data transmission.

[0068] The first indication information is used to indicate that the first cell is not available for data transmission and / or the first beam of the first cell is not available for data transmission.

[0069] In a possible implementation, the first indication information includes a fifth field and a sixth field.

[0070] The fifth field is used to indicate whether the cell is prohibited for a terminal device supporting downlink coverage enhancement.

[0071] The sixth field is used to indicate whether the cell is prohibited for a terminal device not supporting downlink coverage enhancement.

[0072] In a possible implementation, the sixth field is a field used to indicate whether the cell is prohibited for a terminal device supporting non-terrestrial network (NTN) function.

[0073] In a possible implementation, in a case where the terminal device does not support downlink coverage enhancement, the first indication information further includes a synchronization signal and physical broadcast channel block (SSB) period corresponding to the first cell or the first beam of the first cell.

[0074] If the SSB period is less than or equal to a first threshold, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible.

[0075] If the SSB period is greater than the first threshold, the first indication information is used to indicate that the first cell is not campable and / or cannot be camped in the first cell through the first beam of the first cell.

[0076] In a possible implementation, in a case where the terminal device does not support downlink coverage enhancement, the first indication information is indicated through uplink configuration information.

[0077] In a case where the uplink configuration information is empty or not configured, the first indication information is used to indicate that the first cell is not campable and / or cannot be camped in the first cell through the first beam of the first cell.

[0078] In a possible implementation, the first field is a field used to indicate whether the cell is prohibited for a terminal device supporting NTN function.

[0079] In a possible implementation, the first indication information further includes a seventh field; when the first indication information includes the seventh field, the terminal device supporting downlink coverage enhancement ignores the first field.

[0080] If the seventh field indicates not prohibited, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible.

[0081] If the seventh field indicates prohibited, the first indication information is used to indicate that the first cell is not campable and / or cannot be camped in the first cell through the first beam of the first cell.

[0082] In a possible implementation, the first indication information includes a first cell list of excluded cells.

[0083] In a case that the first cell is included in the first cell list, the first indication information is used to indicate that the first cell is not campable and / or not campable through the first beam of the first cell.

[0084] In a possible implementation, the first indication information includes a second cell list of allowed cells.

[0085] In a case that the first cell is included in the second cell list, the first indication information is used to indicate that the first cell is accessible and / or the first beam of the first cell is accessible.

[0086] In a possible implementation, the first indication information further includes first information of a neighboring cell.

[0087] The first information includes at least one of the following: SSB offset of the neighboring cell from the first cell, indication information of whether an SSB period of the neighboring cell is extended, maximum lengthening time of the SSB period of the neighboring cell, SSB period of the neighboring cell, and SSB offset of the neighboring cell from the first cell.

[0088] In a third aspect, an embodiment of the present application provides a terminal device, including a processor and a memory, the memory is used to store code instructions, and the processor is used to run the code instructions to execute the method described in the first aspect or any possible implementation manner of the first aspect.

[0089] In a fourth aspect, an embodiment of the present application provides a network device, including a processor and a memory, the memory is used to store code instructions, and the processor is used to run the code instructions to execute the method described in the second aspect or any possible implementation manner of the second aspect.

[0090] In a fifth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium stores a computer program or instructions, when the computer program or instructions run on a computer, the computer program or instructions make the computer execute the method described in the first aspect or the second aspect.

[0091] In a sixth aspect, an embodiment of the present application provides a computer program product including a computer program, when the computer program runs on a computer, the computer program makes the computer execute the method described in the first aspect or any possible implementation manner of the first aspect.

[0092] In a seventh aspect, the present application provides a chip or a chip system, the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through a line, and the at least one processor is used to run a computer program or instructions to execute the method described in the first aspect or the second aspect. The communication interface in the chip can be an input / output interface, a pin or a circuit, etc.

[0093] In a possible implementation, the chip or the chip system described above in the present application further includes at least one memory in which instructions are stored. The memory can be a storage unit inside the chip, for example, a register, a cache, etc., or a storage unit of the chip (for example, a read-only memory, a random access memory, etc.).

[0094] It should be understood that the second aspect to the seventh aspect of the present application correspond to the technical solution of the first aspect of the present application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation manner are similar, which will not be repeated. BRIEF DESCRIPTION OF DRAWINGS

[0095] FIG. 1 is a schematic diagram of an architecture of a communication system provided by an embodiment of the present application;

[0096] FIG. 2 is a schematic diagram of another architecture of a communication system provided by an embodiment of the present application;

[0097] FIG. 3 is a schematic diagram of division of UE types provided by an embodiment of the present application;

[0098] FIG. 4 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0099] FIG. 5 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0100] FIG. 6 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0101] FIG. 7 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0102] FIG. 8 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0103] FIG. 9 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0104] FIG. 10 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0105] FIG. 11 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0106] FIG. 12 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0107] FIG. 13 is a schematic diagram of implementation of determination of a cell situation provided by an embodiment of the present application;

[0108] FIG. 14 is an interaction signaling diagram of a cell indication method provided by the present application;

[0109] FIG. 15 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0110] For the purpose of clearly describing the technical solutions of the embodiments of the present application, the following briefly introduces some terms and technologies involved in the embodiments of the present application:

[0111] 1. Terminal device

[0112] The terminal device can be a device that contains a wireless transceiver function and can cooperate with a network device to provide communication services for users. Specifically, the terminal device can refer to a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. For example, the terminal device can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a network after 5G, etc. Wherein, 5G refers to the 5th Generation Mobile Communication Technology (5th Generation Mobile Communication Technology), abbreviated as 5G.

[0113] 2. Network device

[0114] Generally having a wireless transceiver function, the network device can have a mobile feature, for example, the network device can be a mobile device. Alternatively, the network device can be a satellite, a balloon station. For example, the satellite can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. In order to ensure the coverage of the satellite and improve the system capacity of the communication network, the satellite can adopt multi-beam to cover the ground, for example, a satellite can form dozens or hundreds of beams to cover the ground, and a beam can cover a ground area with a diameter of dozens to hundreds of kilometers.

[0115] Of course, the network device can also be a base station arranged at a position on land, water, etc., for example, the network device can be a next generation NodeB (gNB) or a next generation-evolved NodeB (ng-eNB). Among them, the gNB provides a new radio (NR) user plane function and a control plane function for the UE, and the ng-eNB provides an evolved universal terrestrial radio access (E-UTRA) user plane function and a control plane function for the UE. It should be noted that gNB and ng-eNB are only names, which are used to represent base stations supporting 5G network systems and do not have limiting meanings. The network device can also be a base transceiver station (BTS) in a GSM system or a CDMA system, or a nodeB (NB) in a WCDMA system, or an evolutional node B (eNB or eNodeB) in an LTE system. Alternatively, the network device can also be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network side device in a network after 5G or a network device in a future evolved PLMN network, a road site unit (RSU), etc.

[0116] 3. Non-terrestrial network (NTN):

[0117] NTN is a communication network that does not completely rely on traditional ground infrastructure (such as land-based cellular towers or fiber optic cables). It uses non-ground communication infrastructure such as satellites, high-altitude platforms (such as drones, stratospheric balloons, etc.) to achieve global communication coverage. It aims to provide safe, reliable, high-bandwidth connection services for areas without ground network coverage or insufficient network coverage through non-ground technology and platforms, thereby greatly expanding the coverage of communication networks.

[0118] One of the most common and important forms of NTN is satellite communication. Through GEO or LEO satellites, NTN can provide broadband Internet access, telecommunications services, and data connections for remote and under-served areas.

[0119] 4. System information (SI)

[0120] Each system information contains a set of parameters related to a certain function, wherein the SI can include a MIB (Master Information Block) and multiple SIBs (System Information Blocks). The SI can be divided into Minimum SI (MSI) and Other SI (OSI).

[0121] The MSI can include the MIB and the SIB1, and the OSI can include all the system information except the OSI, for example, the OSI can include the SIB2 to the SIB19. The SIBs included in the OSI can be extended according to actual needs, which is not limited in the embodiment. In an implementation, the MIB can be periodically broadcasted by the system, and the OSI can be periodically broadcasted by the system or can be transmitted according to the needs of the terminal device.

[0122] The functions of the MIB and part of the SIBs are briefly introduced here.

[0123] The MIB: contains the cell bar information and the basic physical layer information of the cell required for receiving further system information, that is, the MIB contains the information of how to obtain the SIB1.

[0124] The SIB1: defines the scheduling of other system information blocks and contains the information required for initial access, that is, the SIB1 contains the scheduling information of the OSI.

[0125] The SIB2: contains the cell reselection information, which is mainly related to the serving cell.

[0126] The SIB3: contains the information of the serving frequency and the intra-frequency neighboring cells related to the cell reselection (including the frequency-common cell reselection parameters and the cell-specific reselection parameters).

[0127] The SIB4: contains the information of the other NR frequencies and the inter-frequency neighboring cells related to the cell reselection (including the frequency-common cell reselection parameters and the cell-specific reselection parameters), and can also be used for NR idle / inactive measurement.

[0128] The SIB5: contains the information of the E-UTRA (Evolved Universal Terrestrial Radio Access) frequencies and the E-UTRA neighboring cells related to the cell reselection (including the frequency-common cell reselection parameters and the cell-specific reselection parameters).

[0129] - SIB19: used to carry information needed to access NTN or 5G satellite network, e.g., satellite assistance information can be provided for serving cell and / or neighboring cells.

[0130] 5. Beam

[0131] A beam is a kind of communication resource. A beam can be a wide beam, or a narrow beam, or other types of beams. The technology to form a beam can be beamforming technology or other technology means. The beamforming technology can be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology. Different beams can be considered as different resources. The same information or different information can be transmitted through different beams.

[0132] Optionally, multiple beams with the same or similar communication characteristics can be considered as one beam. One beam can be formed by one or more antenna ports for transmitting data channels, control channels, and sounding signals, etc. The one or more antenna ports forming one beam can be considered as an antenna port set.

[0133] 6. Beam state

[0134] In the simulation discussion of satellite beam state, for example, three states can be divided for satellite beams, which are N1 state, N2 state and N3 state.

[0135] The N1 state can be understood as an off state. In the N1 state, there is no signal coverage in the coverage area of the satellite beam, that is, in the coverage area of the satellite beam in this state, satellite service is actually not provided.

[0136] The N2 state can be understood as a state of transmitting only common messages. In the N2 state, there is no active user traffic in the coverage area of the satellite beam, and the satellite beam is only used to transmit necessary information for cell discovery and initial access.

[0137] The N3 state can be understood as an active traffic state. In the N3 state, the coverage area of the satellite beam can contain multiple active users, and the satellite beam can be used to transmit necessary information for cell discovery and initial access.

[0138] Exemplarily, when the satellite beam is in the N1 state and the N2 state, it can be understood that the satellite beam is actually inactive. When the satellite beam is in the N3 state, it can be understood that the satellite beam is activated.

[0139] 6. EIRP

[0140] EIRP (Effective Isotropic Radiated Power) is an indicator that measures the strength of the signal emitted by an antenna in a specific direction, representing the power emitted by the antenna in a certain direction relative to an ideal omnidirectional antenna (i.e., equivalent radiation power).

[0141] In addition, EIRP density refers to the strength of effective isotropic radiated power per unit frequency bandwidth, which is often used to describe the propagation ability of wireless signals at a specific frequency. EIRP density helps to evaluate the strength and coverage of signals during propagation. By reasonably configuring network resources to improve EIRP density, the capacity and coverage quality of the network can be effectively improved.

[0142] 7、R19

[0143] R19 refers to the 19th edition standard published by 3GPP (3rd Generation Partnership Project), where R represents Release (version). R19 UE can be understood as a user equipment that conforms to R19 specification, or as a user equipment designed and manufactured in accordance with R19 standard, or as a UE that supports R19. For example, R19 UE can understand the fields in the standard with the suffix r19, but the UEs before R19 (such as R18 UE, R17 UE) cannot understand the above-mentioned fields.

[0144] Correspondingly, R16 refers to the 16th edition standard published by 3GPP, and R16 UE can be understood as a user equipment that conforms to R16 specification, or as a user equipment designed and manufactured in accordance with R16 standard. By analogy, the rest of the protocol versions are not described here.

[0145] 8、Cell state

[0146] The cell state may include, for example, barred (barred) and not barred (not barred), which will be introduced below.

[0147] When the cell state is indicated as not barred “not barred”, and the cell is not reserved for operator use, and the cell is not for other use or for future use, the UE shall consider the cell as a candidate cell during cell selection and cell reselection. In the technical solution of the present application, when the cell state is indicated as not barred “not barred”, it is described herein as a cell that can be camped on, or it is described as being able to camp on the cell through the beam of the cell.

[0148] When the cell state is indicated as barred, or the cell state is considered as barred, the UE shall not select / reselect the cell, even for emergency calls. And, the UE shall select another cell according to the following rules:

[0149] - If the cell shall be considered as barred due to the failure to acquire the MIB (Master Information Block):

[0150] - The UE can exclude the barred cell from the candidate cells for cell selection / reselection for a maximum time of 300 seconds.

[0151] - If the selection condition is met, the UE can select another cell on the same frequency.

[0152] In one implementation, when the cell does not broadcast cellBarredNTN, the UE may, for example, consider the cell as barred for NTN access.

[0153] 9. Cell camping

[0154] For normal service, the UE shall camp on a suitable cell and monitor the control channels of the cell so that the UE can perform the following operations:

[0155] - Receive system information from a PLMN (Public Land Mobile Network) or SNPN (Standalone Non-Public Network);

[0156] - Receive registration area information, such as tracking area information, from the PLMN or SNPN;

[0157] - Receive other AS (Access Stratum) and NAS (Non-Access Stratum) information;

[0158] - If registered, receive paging and notification messages from the PLMN or SNPN; and also initiate a transition to connected mode.

[0159] 10. Other terms

[0160] In the embodiments of the present application, the same items or similar items with basically the same functions and effects are distinguished by using "first", "second", and the like. For example, the first chip and the second chip are only used to distinguish different chips, and do not limit the sequence. Those skilled in the art can understand that "first", "second", and the like do not limit the quantity and execution sequence, and "first", "second", and the like do not necessarily mean different.

[0161] It should be noted that in the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the present application should not be interpreted as being more advantageous or superior to other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0162] In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0163] After explaining the relevant concepts involved in the present application, the architecture of the communication system in the present application will be described below in conjunction with FIG. 1 and FIG. 2.

[0164] FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application. Please refer to FIG. 1, which includes a terminal device 101 and a satellite 102, and the terminal device 101 and the satellite 102 can perform wireless communication. The network formed between the terminal device 101 and the satellite 102 can also be referred to as NTN. In the architecture of the communication system shown in FIG. 1, the satellite 102 has the function of a base station, and the terminal device 101 and the satellite 102 can directly communicate. Under the system architecture, the satellite 102 can be referred to as a network device.

[0165] FIG. 2 is a schematic diagram of another communication system architecture provided by the embodiments of the present application. Referring to FIG. 2, the communication system includes a terminal device 201, a satellite 202, and a base station 203. The terminal device 201 and the satellite 202 can communicate wirelessly, and the satellite 202 and the base station 203 can communicate. The network formed by the terminal device 201, the satellite 202, and the base station 203 can also be referred to as an NTN. In the architecture of the communication system shown in FIG. 2, the satellite 202 does not have the function of a base station, and communication between the terminal device 201 and the base station 203 needs to be relayed by the satellite 202. In this kind of system architecture, the base station 203 can be referred to as a network device.

[0166] The relationship between the beams and the cells will be further described in combination with FIG. 2.

[0167] It can be understood that a cell is a basic unit in a cellular network, which refers to the coverage area of a base station antenna. It can be understood as a communication service area, which is usually served by a base station. In addition, a cell usually uses multiple beams to serve different areas or users. For example, in a 5G network, multiple beams are allocated in the cell coverage area, and these beams together provide services for UEs in the cell. Each beam can be regarded as a signal path in the cell for serving a specific direction or user group.

[0168] In addition, when a network device sends information to a terminal device, it is usually sent to the terminal device through a beam. At different times, the network device can send information to the terminal device through different beams, for example. The information introduced here can be arbitrarily extended according to actual needs, which is not limited by the embodiments.

[0169] In order to better understand the technical solutions of the present application, on the basis of the above introduction, the related technologies involved in the present application will be further described in detail.

[0170] In the communication scenario of an NTN, because the number of satellite beams that can provide services is very large, and the total energy of the payload allocated to the satellite is limited, it is currently impossible to activate all satellite beams at the same level of EIRP (Effective Isotropic Radiated Power) density in the related art. For example, the proportion of beams activated at the same time can only be maintained within the range of 1.5% (16 / 1058) to 10.02% (106 / 1058) at a certain level of EIRP density.

[0171] It can also be understood that if the number of simultaneously activated satellite beams is large, it can not be possible to maintain a high level of EIRP density, thereby resulting in a decrease in network coverage quality. Conversely, if the number of simultaneously activated satellite beams is small, it is possible to maintain a high level of EIRP density, thereby improving network coverage quality.

[0172] Therefore, in the current NTN architecture, in order to achieve downlink coverage enhancement, the proportion of simultaneously activated beams can be limited, and when the proportion of simultaneously activated beams is limited within a certain range, the activated satellite beams can work at a certain EIRP density. It can also be understood that the satellite beams in the activated state usually need to periodically transmit SSBs. Therefore, in order to adapt to the limitation of the proportion of simultaneously activated beams, the period of the SSBs can be adjusted, for example.

[0173] For example, the period of the SSBs can be lengthened so that the number of simultaneously activated satellite beams can be reduced to adapt to the limitation of the proportion of activated beams. For example, the default period of the SSBs is usually 20 ms, and for 1058 beams, the number of simultaneously activated beams can be as high as 500 or more, which is far beyond the limitation of the proportion of beams described above. Accordingly, if the period of the SSBs is lengthened to 160 ms or 640 ms, the number of simultaneously activated beams can be effectively reduced to meet the limitation of the proportion of activated beams described above to achieve downlink coverage enhancement.

[0174] In addition to lengthening the period of the SSBs, there is another way to achieve downlink enhancement, which is to achieve channel transmission by combining wide and narrow beams. It can be understood that because the coverage of a wide beam is wide, the period of the SSBs of the wide beam can be set to be relatively short. And because the coverage of a narrow beam is narrow, the period of the SSBs of the narrow beam can be set to be relatively long.

[0175] In one implementation, wide beams can be used to transmit downlink common channels, and narrow beams can be used to transmit uplink and downlink dedicated channels. Because the downlink common channel usually needs to be periodically broadcast at a certain frequency, and the coverage of a wide beam is wide, using a wide beam to transmit a downlink common channel can effectively achieve downlink coverage enhancement. At the same time, because the uplink and downlink dedicated channels only need to work when there is data to be transmitted, using a narrow beam can effectively achieve the transmission of uplink and downlink dedicated channels, and the resources of the wide beam can be left for the downlink common channel to achieve downlink coverage enhancement.

[0176] For the two downlink coverage enhancement technologies introduced above, i.e., lengthening the SSB period and using wide beam to transmit downlink common channels, it can be understood that the cells / beams supporting downlink coverage enhancement and the cells / beams not supporting downlink coverage enhancement will be divided. Specifically, when the SSB period of a certain cell / beams is not lengthened, and when a certain cell / beams does not use the configuration of using wide beam to transmit downlink common channels, this cell is a cell / beams not supporting downlink coverage enhancement. When the SSB period of a certain cell / beams is lengthened, or when a certain cell / beams uses the configuration of using wide beam to transmit downlink common channels, this cell is a cell / beams supporting downlink coverage enhancement.

[0177] Correspondingly, for terminal devices, terminal devices not supporting downlink coverage enhancement and terminal devices supporting downlink coverage enhancement will also be divided. For example, when a terminal device does not support the configuration of lengthening the SSB period, and the terminal device does not support receiving downlink common channels on a wide beam, this terminal device is a terminal device not supporting downlink coverage enhancement. When a terminal device supports the configuration of lengthening the SSB period, or the terminal device supports receiving downlink common channels on a wide beam, this terminal device is a terminal device supporting downlink coverage enhancement.

[0178] For the division of the above-mentioned cells / beams and terminal devices, it can be understood that terminal devices not supporting downlink coverage enhancement should not access cells supporting downlink coverage enhancement, which may cause subsequent data transmission abnormalities.

[0179] For example, in the initial access process of a terminal device, an initial BWP (initial BWP) will usually be configured for the terminal device. The initial BWP is mainly used for the initial access process, for example, it can be used for receiving SIB1, receiving RAR, Msg4, and sending preamble and Msg3 in the random access process, etc. Therefore, for example, by configuring the initial BWP, the terminal device can be prevented from initiating random access on a wide beam.

[0180] However, in the current mechanism, if the initial BWP is not configured, the resources used for initial access are defaulted to CORESET0. That is, even if the configuration of using wide beam to transmit downlink common channels is configured, there is still a case where the terminal device attempts to initiate access on a wide beam using the default configuration.

[0181] Therefore, after introducing the downlink coverage enhancement technology, it should be considered to indicate the terminal device supporting the downlink coverage enhancement and the terminal device not supporting the downlink coverage enhancement, so that the terminal device can determine whether the cell can be accessed. Meanwhile, the subsequent behavior of the terminal device after indicating the corresponding cell information to the terminal device should also be considered. At present, there is no effective solution.

[0182] For the above-mentioned problems, the present application proposes a cell indication method, which can inform different types of terminal devices whether they can camp in the corresponding cell or whether they can access the corresponding cell through the field in the system information. Or, it can be informed whether different types of terminal devices can camp in the corresponding cell or whether they can access the corresponding cell through the implicit indication.

[0183] In the present application, when a certain cell (taking the first cell as an example for illustration) is the above-mentioned cell supporting the downlink coverage enhancement, the network device can send the first indication information to the terminal device, for example, to indicate to the terminal device whether the first cell is a cell that can be camped in and whether it is a cell that can be accessed.

[0184] In addition, different ways can be used to indicate whether the cell can be camped in and whether the cell can be accessed for different types of UEs. First, the types of UEs are briefly described below in combination with FIG. 3, which is a schematic diagram of the division of UE types provided by an embodiment of the present application.

[0185] In one implementation, referring to FIG. 3, the UE can be divided into legacy UE and R19 UE, where R19 refers to the UE conforming to the R19 specification, and the legacy UE can be understood as pre-R19 UE, that is, the UE conforming to the protocol version specification before R19, such as R18 UE, or R17 UE, and the like. Further, as shown in FIG. 3, the R19 UE can be further subdivided into the UE supporting the downlink coverage enhancement and the UE not supporting the downlink coverage enhancement. As to whether the UE supports the downlink coverage enhancement, it has been introduced in the above-mentioned embodiments, which will not be described here.

[0186] The indication methods for different types of UEs are introduced below.

[0187] I. Legacy UE

[0188] It can be understood that for the legacy UE, the above-mentioned related configuration of the downlink coverage enhancement is also not supported by the legacy UE. Therefore, the legacy UE should also be prohibited from accessing the cell using the downlink coverage enhancement technology.

[0189] 1. Indication through corresponding field

[0190] In one implementation, the field in system information for indicating cell barring can be reused as the first indication message to indicate whether a cell can be camped on and accessed for legacy UEs. Further, legacy UEs can be further classified into UEs supporting NTN and UEs not supporting NTN, which will be introduced in the following with respect to FIG. 4.

[0191] The first indication message can be, for example, the field in MIB message for indicating cell barring. With reference to FIG. 4, the first indication message can be, for example, cellBarred in MIB message. For example, if the cellBarred field is barred, the UE can determine that the cell status is barred. For another example, if the cellBarred field is not barred, the UE can determine that the cell status is not barred.

[0192] For legacy UEs supporting NTN, the first indication message can be, for example, the field in SIB for indicating cell barring for UEs supporting NTN. With reference to FIG. 4, the first indication message can be, for example, cellBarredNTN in SIB1. Then for legacy UEs supporting NTN, when cellBarredNTN is carried in SIB1, the UE can ignore the cellBarred in MIB message and determine whether the cell can be accessed according to the cellBarredNTN in SIB1. For example, if the cellBarredNTN field is barred, the UE can determine that the cell can be accessed. For another example, if the cellBarredNTN field is not barred, the UE can determine that the cell cannot be accessed.

[0193] In this way, one set of system information can be used to indicate whether the first cell is barred for different types of UEs. It can be understood that, in the case that the UE determines that the first cell can be accessed, the UE does not necessarily access the first cell, which depends on the actual implementation of the UE in performing the cell selection process.

[0194] 2. Indication by cell list

[0195] In one implementation, the UE can be indicated by a cell list whether the first cell is a campable cell and an accessible cell.

[0196] For example, for a legacy UE, the original excluded cell list can be reused, in which the original excluded cells can be included, and in addition, the cells supporting downlink coverage enhancement can also be included. It can be understood that the "excluded cell" here means that the UE does not initiate measurement to these cells.

[0197] When the first cell is included in the cell list of the excluded cell, the first indication information is used to indicate that the first cell is not campable and / or not campable in the first cell through the first beam. In fact, when the cell is not campable, the cell is not accessible, and here it is only more comprehensive. Conversely, when the first cell is not included in the cell list of the excluded cell, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible. Similarly, when the cell is accessible, the cell is campable, and here it is only more comprehensive.

[0198] The cell access status can be indicated simply and effectively by the cell list.

[0199] II. R19 UE

[0200] Based on the above introduction, it can be determined that for R19 UE, R19 UE supporting downlink coverage enhancement and R19 UE not supporting downlink coverage enhancement can be subdivided. For these two types of UEs, the same first indication information can be used to indicate whether the cell is campable and accessible, or two different first indication information can be used to indicate whether the cell is campable and accessible. The following will introduce the two cases respectively.

[0201] First, the implementation of using the same first indication information to indicate the implementation for the two types of UEs is introduced in combination with FIG. 4 to FIG. 9.

[0202] 1. The first indication information includes a first field in the first system information. The first field is a field for indicating whether the cell is prohibited.

[0203] Referring to FIG. 5, for example, the first system information can be SIB1, and the first field can be a field added in SIB1 for indicating whether the downlink coverage enhancement cell is prohibited. It is assumed that the first field can be represented as barNTNDL. In actual implementation, the specific selection of system information and the specific naming of the first field can be arbitrarily extended according to actual needs, and the embodiment does not limit this.

[0204] As shown in FIG. 5, it can include the following cases:

[0205] Case a, if the first field indicates that the cell is barred (e.g. the value of barNTNDL is barred, i.e. “barred” in the figure), and no other barring field is defined, the first indication information is used to indicate that the first cell is not campable and / or not campable via the first beam in the first cell. Wherein the first beam is the beam used to transmit the first indication information.

[0206] It can be understood that when the cell and / or the beam is not campable, the cell and / or the beam is naturally not accessible, and the figure only gives a more comprehensive description, which actually has the same meaning as the literal description herein, and the description in the following is similar, and will not be repeated.

[0207] It can be understood that in this case, as long as the first field indicates that the cell is barred, the terminal device can determine that the first cell is not campable and / or not campable via the first beam in the first cell, regardless of whether the UE supports downlink coverage enhancement or not. It can be understood that the cell in “the cell is barred” herein is a cell in a broad sense, and does not specifically refer to a certain cell, and the following is similar.

[0208] Case b, if the first field indicates that the cell is not barred (e.g. the value of barNTNDL is not barred, i.e. “not barred” in the figure), the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE supporting downlink coverage enhancement or the UE not supporting downlink coverage enhancement.

[0209] It can be understood that when the cell and / or the beam is accessible, the cell and / or the beam is naturally campable, and the figure only gives a more comprehensive description, which actually has the same meaning as the literal description herein, and the description in the following is similar, and will not be repeated.

[0210] It can be understood that when the first cell is a cell supporting downlink coverage enhancement, the UE not supporting downlink coverage enhancement should not access the first cell, and therefore the value of barNTNDL is not barred is only used to indicate the UE supporting downlink coverage enhancement, and can specifically indicate that the first cell is accessible and / or the first beam is accessible.

[0211] For the UE not supporting downlink enhancement, it can determine that the cell is barred by the value of barNTN field being barred, and the UE supporting downlink coverage enhancement will ignore the barNTN field when the SIB1 includes the barNTNDL field.

[0212] Case c, if the first field indicates that the cell does not allow access (e.g. the value of barNTNDL is access not allowed, i.e. "Access not allowed" in the figure), the first indication information is used to indicate that the first cell is a cell that is residable but not accessible for the UE supporting downlink coverage enhancement, and / or, indicate that the first cell can be camped on by the first beam but cannot be accessed by the first beam.

[0213] It can be determined according to the above introduction that the cell with downlink coverage enhancement can be a cell with a lengthened SSB period, or a cell with a beam that can only transmit downlink common channels. For the latter implementation, it is possible that the cell can only transmit downlink common channels and cannot provide random access to the UE. That is, for the cell with downlink coverage enhancement, it can transmit system information to the UE, that is, it can be camped on by the UE, but it cannot be accessed by the UE.

[0214] For this case, an additional value of the first field indicating that access is not allowed can be additionally set in the embodiment to inform the UE that the current first cell is a cell that can be camped on (i.e. can receive system information) but cannot be accessed, so as to improve the subdivision of the indication of the cell case, so as to effectively cover the case that the first cell allows the UE supporting downlink coverage enhancement to camp on but cannot be randomly accessed.

[0215] It needs to be understood with reference to FIG. 5 that because the first cell is configured with downlink coverage enhancement, for the UE not supporting downlink coverage enhancement, the first field will necessarily indicate barred, so as to avoid the UE not supporting downlink coverage enhancement from accessing the cell supporting downlink coverage enhancement. Therefore, when the UE does not support downlink coverage enhancement, the first field in the SBI1 of the first cell will not appear not barred and access not allowed.

[0216] For the UE supporting downlink coverage enhancement, it can access the first cell. Further, the network device can consider the access case of the first cell and the network case, so as to configure the first field in the SBI1 of the first cell to be barred, not barred or access not allowed, which is not limited in the embodiment.

[0217] In summary, the barNTNDL in the SIB1 can effectively indicate whether the first cell is campable and whether the cell is accessible to the R19 UE, and similarly for the beam, so that the UE with various capabilities can effectively obtain the cell case and / or the beam case.

[0218] It should be understood that the first field in the first system information introduced above is only an example of barNTNDL in SIB1, and in actual implementation, the selection of the first system information, the specific location of the first field, and the specific naming can be extended according to actual needs. In addition, the various values of the first field (barred, not barred, and access not allowed) introduced above are only example descriptions, and in actual implementation, they can be set arbitrarily according to actual needs as long as the corresponding meanings can be expressed.

[0219] 2. The first indication information includes a first field and / or a second field in the first system information.

[0220] The first field is a field for indicating whether the cell is barred, and the second field is used to indicate that the first beam for transmitting the first indication information is only used for transmitting a downlink common channel.

[0221] As can be understood from the above description of FIG. 2, the network device usually transmits information to the terminal device through a beam. Therefore, the implementation of the beam can also be understood as the implementation of the cell. For example, the network device can transmit first indication information of a first cell to a UE through a first beam, where the first beam is a beam only used for transmitting a downlink common channel. Accordingly, the UE can determine that the first cell is a cell only used for transmitting a downlink common channel.

[0222] Referring to FIG. 6, the implementation of the first field is similar to the above embodiments, for example, it can be barNTNDL in SIB1. In addition, the second field is an indication field for indicating only transmission of a DL, which can be represented as DL only indication. In actual implementation, the specific naming of the second field can be set arbitrarily according to actual needs as long as it can express the corresponding meaning.

[0223] As shown in FIG. 6, it can include the following cases:

[0224] Case a, if the first field indicates that the cell is barred (for example, the value of barNTNDL is barred, that is, “barred” in the figure), then the first indication information is used to indicate that the first cell is not available for camping and / or not available for camping in the first cell through the first beam.

[0225] Case b, if the first field indicates that the cell is not barred (for example, the value of barNTNDL is not barred, that is, “barred” in the figure), and the second field is not included in SIB1, then the first indication information is used to indicate that the first cell is accessible and / or the first beam is available for camping for a UE supporting downlink coverage enhancement.

[0226] The implementation of case a and case b is similar to the above embodiment, which will not be described here.

[0227] Case c, if the first field indicates that the cell is not barred (for example, the value of barNTNDL is not barred, that is, "not barred" in the figure), and the second field is contained in the SIB1, the first indication information is used to indicate, for the UE supporting downlink coverage enhancement, that the first cell is a residable but non-accessible cell, and / or, that the first cell can be camped on by the first beam but cannot be accessed by the first beam.

[0228] It can be determined from the above description that when the cell transmits only downlink common channels by beams, there can be a case that the cell and / or the beam can only transmit downlink common channels and cannot provide random access to the UE. Then, for example, the UE can be informed by the DL only indication that the first cell and / or the first beam is only used for transmitting downlink common channels and cannot do random access.

[0229] Meanwhile, the first field is used to indicate that the cell is not barred, so the UE supporting downlink coverage enhancement can determine that the first cell is a residable but non-accessible cell, and / or, can determine that the first cell can be camped on by the first beam but cannot be accessed by the first beam. This implementation can also effectively cover the case that the first cell allows the UE supporting downlink coverage enhancement to camp, but cannot do random access, so as to improve the subdivision degree of the indication of the cell case.

[0230] Case d: The second field is contained in the SIB1, and the first indication information is used to indicate, for the UE supporting downlink coverage enhancement, that the first cell is a residable but non-accessible cell, and / or, that the first cell can be camped on by the first beam but cannot be accessed by the first beam.

[0231] In this embodiment, the first indication information can also only contain the second field, that is, the UE can be informed by the separate second field DL only indication that the first cell and / or the first beam is only used for transmitting downlink common channels and cannot do random access. So that the UE determines that the first cell is a residable but non-accessible cell, and / or, determines that the first cell can be camped on by the first beam but cannot be accessed by the first beam.

[0232] If the second field is included in the first indication information, the R19 UE or the UE supporting downlink coverage enhancement of the R19 ignores the barNTN field with the value of barred, and the cell determined by the second field DL only indication can only receive downlink common channels such as system messages; other UEs confirm that the cell is prohibited by the barNTN field with the value of barred.

[0233] Fig. 6 is similar to Fig. 5 described above. Since the first cell is configured with downlink coverage enhancement, the first field will certainly indicate barred for the UE not supporting downlink coverage enhancement, so as to avoid the UE not supporting downlink coverage enhancement from accessing the cell supporting downlink coverage enhancement. Therefore, when the UE does not support downlink coverage enhancement, the first field in the SIB1 of the first cell will not appear not barred.

[0234] In summary, through the barNTNDL field in the SIB1 and the field of the optional DL only indication, the R19 UE can be effectively indicated whether the first cell can be camped and whether the cell can be accessed, and the same is true for the beam, so that various configured UEs can effectively obtain the cell situation and / or beam situation.

[0235] 3. The first indication information includes a first field and / or a third field in the first system information.

[0236] The first field is a field for indicating whether the cell is prohibited, and the third field is for indicating whether the first cell and / or the first beam can be accessed.

[0237] Referring to Fig. 7, the implementation of the first field is similar to the above embodiments, for example, it can be barNTNDL in the SIB1, or it can be represented as barNTNDL1. The third field is a field for indicating whether the first cell can be accessed, for example, it can be represented as barNTNDL2. In actual implementation, the specific name of the third field can be arbitrarily set according to actual needs, as long as it can express the corresponding meaning.

[0238] As shown in Fig. 7, it can include the following cases:

[0239] Case a, if the first field indicates that the cell is prohibited (for example, the value of barNTNDL is barred, that is, “prohibited” in the figure), then the first indication information is used to indicate that the first cell cannot be camped and / or cannot be camped in the first cell through the first beam.

[0240] The implementation of case a is similar to the above embodiments, which will not be described here.

[0241] Case b, if the first field indicates that the cell is not barred (e.g. the value of barNTNDL is not barred, i.e. “barred” in the figure), and the third field indicates accessible, the first indication information is used to indicate to the UE supporting downlink coverage enhancement that the first cell is accessible and / or the first beam is accessible.

[0242] Case c, if the first field indicates that the cell is not barred (e.g. the value of barNTNDL is not barred, i.e. “barred” in the figure), and the third field indicates inaccessible, the first indication information is used to indicate to the UE supporting downlink coverage enhancement that the first cell is a cell that is residable but not accessible, and / or, that it is possible to camp on the first cell through the first beam but not accessible through the first beam.

[0243] It can be determined from the above description that when the cell transmits only downlink common channels through beams, there can be a case that the cell can only transmit downlink common channels and cannot provide random access to the UE. Then, for example, two layers of indication can be set, first, through the first field, to inform the UE whether the first cell is currently residable and / or whether the first cell can be camped on through the first beam, and then through the third field, to inform the UE whether the first cell and / or the first beam is currently accessible.

[0244] In the case where the first field indicates that the cell is barred, it corresponds to that the first cell is not residable and / or the first cell cannot be camped on through the first beam, and the UE can no longer consider the indication of the third field. When the first field indicates that the cell is not barred, the UE can determine whether the first cell and / or the first beam is accessible according to the indication of the third field.

[0245] For example, if the third field indicates that the first cell and / or the first beam is accessible, the first indication information can be used to indicate to the UE supporting downlink coverage enhancement that the first cell is accessible and / or the first beam is accessible. And, if the third field indicates that the first cell and / or the first beam is not accessible, the first indication information can be used to indicate to the UE supporting downlink coverage enhancement that the first cell is a cell that is residable but not accessible, and / or, that it is possible to camp on the first cell through the first beam but not accessible through the first beam.

[0246] This implementation manner can also effectively cover the case that the first cell allows the UE supporting downlink coverage enhancement to camp on, but cannot do random access, so as to improve the subdivision degree of the indication of the cell case.

[0247] Case d: the third field is contained in the SIB1;

[0248] In the embodiment, the first indication information can also only include the third field. If the third field indicates inaccessible, the first indication information is used to indicate, for the UE supporting downlink coverage enhancement, that the first cell is a cell which is residable but not accessible, and / or that the first cell can be camped on by the first beam but cannot be accessed by the first beam.

[0249] If the first indication information includes the third field, the R19 UE or the R19 UE supporting downlink coverage enhancement ignores the barNTN field with the value of barred, and determines that the cell cannot initiate random access by the third field with the value of inaccessible; and other UEs confirm that the cell is barred by the barNTN field with the value of barred.

[0250] If the third field indicates accessible, the first indication information is used to indicate, for the UE supporting downlink coverage enhancement, that the first cell is accessible and / or the first beam is accessible.

[0251] That is, the UE can be informed by the separate third field whether the first cell and / or the first beam can be accessed at present. So that the UE determines the details of the first cell and / or the first beam.

[0252] FIG. 7 is similar to FIG. 5. Since the first cell supports downlink coverage enhancement, the first field will necessarily indicate barred for the UE not supporting downlink coverage enhancement, so as to avoid the UE not supporting downlink coverage enhancement from accessing the cell in the downlink coverage enhancement state. Therefore, when the UE does not support downlink coverage enhancement, the first field in the SIB1 of the first cell will not appear not barred.

[0253] In summary, by the first field and the third field in the SIB1, the R19 UE can be effectively indicated whether the first cell is residable and whether the cell is accessible, and the same is true for the beam, so that various configured UEs can effectively obtain the cell situation and / or the beam situation.

[0254] 4. The first indication information includes a first field and / or a fourth field in the first system information.

[0255] The first field is a field used to indicate whether the cell is barred, and the fourth field is used to indicate that the first beam for transmitting the first indication information is in a first state, in which the first beam can be used for initial access but cannot be used for data transmission. Illustratively, the first state can be understood as the N2 state described above.

[0256] Similar to the above description, the related implementation of the beam can also be understood as the related implementation of the cell. For example, the network device can send the first indication information of the first cell to the UE through the first beam, where the first beam is the beam in the N2 state, and then the UE can determine that the first cell is a cell that cannot be used for data transmission.

[0257] Referring to FIG. 8, the implementation of the first field is similar to the above embodiment, for example, it can be barNTNDL in SIB1. The fourth field is a field for indicating that the first beam is in the first state, for example, it can be represented as N2 state. In actual implementation, the specific name of the fourth field can be arbitrarily set according to actual needs, as long as it can express the corresponding meaning.

[0258] As shown in FIG. 8, it can include the following cases:

[0259] Case a, if the first field indicates that the cell is barred (for example, the value of barNTNDL is barred, that is, “barred” in the figure), then the first indication information is used to indicate that the first cell cannot be camped and / or cannot be camped in the first cell through the first beam.

[0260] Case b, if the first field indicates that the cell is not barred (for example, the value of barNTNDL is not barred, that is, “barred” in the figure), and the fourth field is not included in SIB1, then the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE supporting downlink coverage enhancement.

[0261] The implementation of case a and case b is similar to the above embodiment, which will not be described here.

[0262] Case c, if the first field indicates that the cell is not barred (for example, the value of barNTNDL is not barred, that is, “barred” in the figure), and the fourth field is included in SIB1, then the first indication information is used to indicate that the first cell is a cell that can be camped, accessed but cannot be used for data transmission, and / or, it is indicated that the first cell can be camped through the first beam, and it can also be accessed through the first beam, but it cannot be transmitted through the first beam at the same time.

[0263] As can be determined from the above description, when the beam is in the N2 state, the beam can provide random access, but cannot be used for data transmission. Therefore, when the first beam for sending the first indication information is in the N2 state, there is also a case that the UE can receive system information in the first cell and / or the first beam, and can also be randomly accessed, but cannot transmit data.

[0264] So for example, the first field can indicate that the cell is not barred, to inform that the current first cell is a campable cell. Further, the N2 state can also inform the UE that the current first beam is in N2 state, which can also indicate that the current first cell and / or first beam can do random access but cannot do data transmission. Then the UE supporting downlink coverage enhancement can determine that the first cell is a campable, accessible but cannot do data transmission cell.

[0265] This implementation further covers the case that the first cell allows the UE supporting downlink coverage enhancement to camp, to do random access but cannot do data transmission, to improve the subdivision level of the indication of the cell case.

[0266] Case d: the SIB1 contains the fourth field, the first indication information is used to indicate for the UE supporting downlink coverage enhancement that the first cell cannot do data transmission and / or the first beam cannot do data transmission.

[0267] In this embodiment, the first indication information can also only contain the fourth field, that is, the UE can be informed by the single fourth field N2 state that the current first cell and / or first beam can transmit system information, can do random access but cannot transmit data, cannot do random access. To make the UE determine the specific case of the first cell and / or first beam.

[0268] Figure 7 is similar to the above-mentioned Figure 5, because the first cell is configured with downlink coverage enhancement, then for the UE not supporting downlink coverage enhancement, the first field will necessarily indicate barred, to avoid the UE not supporting downlink coverage enhancement accessing the cell supporting downlink coverage enhancement. So when the UE does not support downlink coverage enhancement, the first field in the SIB1 of the first cell will not appear not barred.

[0269] In summary, through the barNTNDL and optionally set N2 state field in the SIB1, the R19 UE can be effectively indicated whether the first cell is campable, whether the cell is accessible and whether the cell can do data transmission, and similarly for the beam, so that various configured UEs can effectively obtain the cell case and / or beam case.

[0270] For the above-mentioned first implementation to the fourth implementation, for the R19 UE or R19 UE supporting downlink coverage enhancement, it can ignore the indication of cellBarred in the MIB message and cellBarredNTN in the SIB1, and determine the cell case and / or beam case according to the above-mentioned manner.

[0271] 5. The first indication information comprises a cell barred field in the MIB, a first field in the first system information, and a seventh field in the second system information.

[0272] The first field is a field indicating whether the cell is barred for a terminal device supporting an NTN function, and the seventh field is a field indicating whether the cell is barred for a terminal device supporting downlink coverage enhancement.

[0273] The cell barred field in the MIB may, for example, be the cellBarred described above, which can indicate whether the cell is barred for a legacy UE. The R19 UE may, for example, ignore the MIB and then determine whether the first cell and / or the first beam is accessible according to the first field in the first system information and the seventh field in the second system information.

[0274] The first field in the first system information may, for example, be the cellBarredNTN in the SIB1, and the seventh field in the second system information may, for example, be the barNTNDL in the SIB19. In actual implementation, the selection of the first system information and the second system information may be arbitrarily extended according to actual needs, and the specific naming of the first field and the seventh field may be arbitrarily set according to actual needs, as long as it can express the corresponding meaning.

[0275] As shown in FIG. 9, it may include the following cases:

[0276] Case a: If the first field indicates that the cell is not barred (for example, the value of cellBarredNTN is not barred, that is, “not barred” in the figure), the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible.

[0277] In this embodiment, in the case where the first field in the first system information indicates that the cell is not barred, the UE supporting downlink coverage enhancement and the UE not supporting downlink coverage enhancement can both determine that the first cell is accessible and / or the first beam is accessible.

[0278] The first field is cellBarredNTN, that is, it indicates whether the cell is barred for the UE supporting NTN. It can be understood that whether the R19 UE supports downlink coverage enhancement or does not support downlink coverage enhancement, it is all supporting NTN. And assuming that the first cell is an NTN cell and downlink coverage enhancement is not configured, theoretically, the R19 UE supporting downlink coverage enhancement and the R19 UE not supporting downlink coverage enhancement can access the first cell and / or the first beam. Therefore, the first field can be used to indicate that the UE supporting downlink coverage enhancement and the UE not supporting downlink coverage enhancement can access the first cell and / or the first beam.

[0279] Case b, if the first field indicates that the cell is barred (for example, the value of cellBarredNTN is barred, that is, “barred” in the figure), and the terminal device is a cell not supporting downlink coverage enhancement, the first indication information is used to indicate that the first cell cannot be camped and / or cannot be camped in the first cell through the first beam for the UE not supporting downlink coverage enhancement.

[0280] It can be understood from the above introduction that when the first cell is a cell configured with downlink coverage enhancement, if the UE does not support downlink coverage enhancement, the UE should not access the first cell and / or the first beam. Therefore, the value of cellBarredNTN can be set to barred to indicate to the UE not supporting downlink coverage enhancement that the first cell cannot be camped and / or cannot be camped in the first cell through the first beam.

[0281] In addition, it is also possible that the first cell is not configured with downlink coverage enhancement, but the first cell does not support camping and access due to load or network reasons, and the value of cellBarredNTN can be set to barred to indicate to the UE not supporting downlink coverage enhancement that the first cell cannot be camped and / or cannot be camped in the first cell through the first beam.

[0282] The embodiment does not limit the specific case of the first field indicating that the cell is barred.

[0283] Case c, if the first field indicates that the cell is barred (for example, the value of cellBarredNTN is barred, that is, “barred” in the figure), and the terminal device is a cell supporting downlink coverage enhancement, in the case that the seventh field indicates that the cell is not barred (for example, the value of barNTNDL is not barred, that is, “not barred” in the figure), the first indication information is used to indicate that the first cell can be accessed and / or the first beam can be accessed for the UE supporting downlink coverage enhancement.

[0284] It can be understood from the above description that when the first cell is a cell configured with downlink coverage enhancement, if the UE does not support downlink coverage enhancement, the UE should not access the first cell and / or the first beam. However, if the UE supports downlink coverage enhancement, the UE can theoretically access the first cell and / or the first beam. Therefore, when the first cell is a cell configured with downlink coverage enhancement, the value of cellBarredNTN can be set as barred, for example, to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam for the UE that does not support downlink coverage enhancement.

[0285] For the UE that supports downlink coverage enhancement, the specific situation of the first cell and / or the beam can be further determined according to the indication of the seventh field. In this way, the same set of indication information can be used to indicate the cell situation and / or the beam situation of different types of terminal devices.

[0286] For example, in the case where the seventh field indicates that the cell is not barred, the UE that supports downlink coverage enhancement can determine that the first cell is accessible and / or the first beam is accessible.

[0287] Case d, if the first field indicates that the cell is barred (for example, the value of cellBarredNTN is barred, that is, “barred” in the figure), and the terminal device is a cell that supports downlink coverage enhancement, in the case where the seventh field indicates that the cell is barred (for example, the value of barNTNDL is barred, that is, “barred” in the figure), the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam for the UE that supports downlink coverage enhancement.

[0288] Similar to the case c described above, when the first cell is a cell configured with downlink coverage enhancement, the UE that supports downlink coverage enhancement will further determine the specific situation of the first cell according to the indication of the seventh field.

[0289] For example, in the case where the seventh field indicates that the cell is barred, the UE that supports downlink coverage enhancement can determine that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam. It can be extended that when SIB19 cannot be acquired or the barNTNDL field in SIB19 is default, the first indication information can also indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through the first beam.

[0290] In this way, by combining the first field in SIB1 and the second field in SIB19, the cell unresidence and unaccessibility of the UE supporting downlink coverage enhancement are indicated, so that the UE supporting downlink coverage enhancement can acquire SIB19 in addition to SIB1 in the process of acquiring cell information and / or beam information. Referring to FIG. 9, SIB19 may, for example, contain the SSB period of the adjacent cell and / or adjacent beam, and may also contain the remaining information of the adjacent cell and / or adjacent beam, so as to effectively improve the amount of information that the UE can acquire.

[0291] In summary, by means of cellBarredNTN in SIB1 and barNTNDL in SIB19, the first cell whether it can be camped on, the cell whether it can be accessed, and the cell whether it can be used for data transmission are indicated to the R19 UE in a hierarchical manner, and the same applies to the beam. In this process, the same set of configuration information can be used to indicate the cell and / or beam conditions for different types of UEs, and further the amount of information that the UE supporting downlink coverage enhancement can acquire can be improved.

[0292] It should be understood that the values of the fields introduced above are only exemplary, and in actual implementation, the values of the fields can be arbitrarily extended according to actual needs, or the implementation of the fields indicating the corresponding meanings can also be arbitrarily set according to actual needs, as long as the fields can express the corresponding meanings. For example, the fields introduced above can express the meaning of whether the cell is barred.

[0293] The above describes the implementation of indicating two types of UEs by using the same first indication information by means of FIGS. 4-9. The implementation of indicating two types of UEs by using different first indication information will be introduced below in combination with FIGS. 10-13.

[0294] 1. The first system information contains a fifth field indicating whether the cell is barred for the UE supporting downlink coverage enhancement, and the first system information contains a sixth field indicating whether the cell is barred for the UE not supporting downlink coverage enhancement.

[0295] It can include the following two cases:

[0296] Case a, a fifth field is added in the first system information, which is used to indicate whether the cell is barred for the UE supporting downlink coverage enhancement. The field in the first system information used to indicate whether the cell is barred for the UE supporting NTN function is multiplexed as a sixth field, which is used to indicate whether the cell is barred for the UE not supporting downlink coverage enhancement.

[0297] The field added in the first system information can be denoted as barNTNDL, and the field in the first system information for indicating whether the cell is barred for the UE supporting the NTN function can be denoted as cellBarredNTN. That is, the cell supporting the downlink coverage enhancement can be indicated according to barNTNDL, and the cell not supporting the downlink coverage enhancement can be indicated according to cellBarredNTN.

[0298] Referring to FIG. 10, when the value of barNTNDL is barred (i.e., “barred” shown in the figure), the first indication information is used to indicate that the first cell is not accessible and / or the first beam is not accessible for the UE supporting the downlink coverage enhancement.

[0299] When the value of barNTNDL is not barred (i.e., “not barred” shown in the figure), the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE supporting the downlink coverage enhancement.

[0300] When the value of cellBarredNTN is barred (i.e., “barred” shown in the figure), the first indication information is used to indicate that the first cell is not accessible and / or the first beam is not accessible for the UE not supporting the downlink coverage enhancement.

[0301] When the value of cellBarredNTN is not barred (i.e., “not barred” shown in the figure), the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE not supporting the downlink coverage enhancement.

[0302] In this implementation, the R19 UE supporting the downlink coverage enhancement can ignore the indication of cellBarred in the MIB message and cellBarredNTN in the SIB1, and determine the cell situation and / or the beam situation according to the above-mentioned manner. The R19 UE not supporting the downlink coverage enhancement can ignore the indication of cellBarred in the MIB message, and determine the cell situation and / or the beam situation according to the above-mentioned manner.

[0303] Case b, two fields are added in the first system information, one is a fifth field for indicating whether the cell is barred for the UE supporting the downlink coverage enhancement, and the other is a sixth field for indicating whether the cell is barred for the UE not supporting the downlink coverage enhancement.

[0304] The fifth field added in the first system information for indicating whether the cell is barred for the UE supporting downlink coverage enhancement, for example, can be denoted as barNTNDL1, and the sixth field added in the first system information for indicating whether the cell is barred for the UE not supporting downlink coverage enhancement, for example, can be denoted as barNTNDL2.

[0305] Referring to FIG. 11, when the value of barNTNDL1 is barred (i.e., “barred” shown in the figure), the first indication information is used to indicate that the first cell is not available for camping and / or not available for camping through the first beam for the UE supporting downlink coverage enhancement.

[0306] When the value of barNTNDL1 is not barred (i.e., “not barred” shown in the figure), the first indication information is used to indicate that the first cell is available for camping and / or the first beam is available for camping for the UE supporting downlink coverage enhancement.

[0307] When the value of barNTNDL2 is barred (i.e., “barred” shown in the figure), the first indication information is used to indicate that the first cell is not available for camping and / or not available for camping through the first beam for the UE not supporting downlink coverage enhancement.

[0308] When the value of barNTNDL2 is not barred (i.e., “not barred” shown in the figure), the first indication information is used to indicate that the first cell is available for camping and / or the first beam is available for camping for the UE not supporting downlink coverage enhancement.

[0309] In this way, different fields are used for indicating different types of UEs, so that different types of UEs can effectively obtain the corresponding cell situation and / or beam situation.

[0310] In this implementation, the R19 UE supporting downlink coverage enhancement and the R19 UE not supporting downlink coverage enhancement can both ignore the indication of cellBarred in the MIB message and cellBarredNTN in the SIB1, and determine the cell situation and / or beam situation according to the above-mentioned manner.

[0311] 2. The UE supporting downlink coverage enhancement is indicated by the first field in the first system information, and the UE not supporting downlink coverage enhancement is indicated by the SSB period of the first cell and / or the first beam.

[0312] The first field in the first system information may be represented as barNTNDL, for example. Referring to FIG. 12, when the value of barNTNDL is barred (i.e., “barred” shown in the figure), the first indication information indicates that the first cell is not allowed to be camped on and / or is not allowed to be camped on by the first beam for the UE supporting downlink coverage enhancement.

[0313] When the value of barNTNDL is not barred (i.e., “not barred” shown in the figure), the first indication information indicates that the first cell is allowed to be accessed and / or the first beam is allowed to be accessed for the UE supporting downlink coverage enhancement.

[0314] In addition, whether the UE not supporting downlink coverage enhancement is allowed to camp on and is allowed to access the first cell may be implicitly indicated by the SSB period of the first cell and / or the first beam. As shown in FIG. 12, it may include the following two cases:

[0315] Case a: The SSB period is greater than a first threshold, and the first indication information indicates that the first cell is not allowed to be camped on and / or is not allowed to be camped on by the first beam for the UE not supporting downlink coverage enhancement.

[0316] Based on the above description, it can be determined that one strategy of downlink coverage enhancement is to lengthen the SSB period. Therefore, for example, whether the first cell is a cell configured with downlink coverage enhancement may be implicitly indicated by the SSB period, so as to indicate the case of the first cell and / or the first beam for the UE not supporting downlink coverage enhancement.

[0317] The first threshold may be a threshold of the lengthened SSB period corresponding to downlink coverage enhancement, for example. In the above example, the first threshold may be set to 160 ms, for example. Alternatively, according to actual implementation of downlink coverage enhancement, the specific setting of the first threshold may be adjusted according to actual needs, which is not limited in the embodiment. In general, it can be understood that when the SSB period of the cell is greater than the first threshold, the cell can be understood as a cell configured with downlink coverage enhancement.

[0318] Referring to FIG. 12, assuming that the SSB period of the first cell and / or the first beam is greater than the first threshold, the first indication information may implicitly indicate that the first cell is not allowed to be camped on and / or is not allowed to be camped on by the first beam for the UE not supporting downlink coverage enhancement.

[0319] Case b: The SSB period is less than or equal to the first threshold, and the first indication information indicates that the first cell is allowed to be accessed and / or the first beam is allowed to be accessed for the UE not supporting downlink coverage enhancement.

[0320] And referring to FIG. 12, assuming that the SSB period of the first cell is less than or equal to the first threshold, it means that the first cell is not configured with downlink coverage enhancement, and thus the first indication information can implicitly indicate that the first cell is accessible and / or the first beam is accessible to the UE that does not support downlink coverage enhancement.

[0321] In this case, it can be understood that, when the terminal device supports downlink coverage enhancement, the first indication information can be understood as a first field in the first system information for indicating whether the cell is barred for the terminal device supporting downlink coverage enhancement. When the terminal device does not support downlink coverage enhancement, the first indication information can be understood as the SSB period. Different types of terminal devices can determine the specific situation of the first cell through different fields respectively. And the implicit indication of the cell situation and / or the beam situation to the UE that does not support downlink coverage enhancement through the SSB period can effectively reduce the amount of data to be transmitted.

[0322] In this implementation, both the R19 UE supporting downlink coverage enhancement and the R19 UE not supporting downlink coverage enhancement can ignore the indication of cellBarred in the MIB message and cellBarredNTN in the SIB1, and thus determine the cell situation and / or the beam situation according to the above-mentioned manner.

[0323] 3. Indicate the UE supporting downlink coverage enhancement through the first field in the first system information, and indicate the UE not supporting downlink coverage enhancement through the UL configuration.

[0324] For example, the first field in the first system information can be represented as barNTNDL. Referring to FIG. 12, when the value of barNTNDL is barred (i.e., “barred” shown in the figure), the first indication information is used to indicate that the first cell is not campable and / or not campable through the first beam for the UE supporting downlink coverage enhancement.

[0325] And when the value of barNTNDL is not barred (i.e., “not barred” shown in the figure), the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE supporting downlink coverage enhancement.

[0326] In addition, whether the UE not supporting downlink coverage enhancement is campable and / or accessible to the first cell can be implicitly indicated by whether the UL configuration is included. As shown in FIG. 13, it can include the following two cases:

[0327] Case a, the network device does not configure the UL related configuration, and the first indication information is used to indicate that the first cell is not campable and / or not campable through the first beam for the UE not supporting downlink coverage enhancement.

[0328] Based on the above introduction, it can be determined that one strategy of downlink coverage enhancement is that a wide beam is used for transmitting a downlink common channel. Therefore, for example, by not configuring UL related configuration in SIB1, the first cell and / or the first beam can be implicitly indicated as a cell (or a beam) for transmitting only a downlink common channel, thereby indicating the case of the first cell and / or the first beam for a UE that does not support downlink coverage enhancement.

[0329] Referring to FIG. 12, assuming that the UL configuration is not included in SIB1, the first indication information can implicitly indicate, for a UE that does not support downlink coverage enhancement, that the first cell cannot be camped and / or cannot be camped in the first cell through the first beam.

[0330] Case b, the network device configures the UL related configuration, and the first indication information is used to indicate, for a UE that does not support downlink coverage enhancement, that the first cell is accessible and / or the first beam is accessible.

[0331] And referring to FIG. 12, assuming that the UL configuration is included in SIB1, it means that the first cell can be used for transmitting an uplink channel, and therefore the first indication information can implicitly indicate, for a UE that does not support downlink coverage enhancement, that the first cell is accessible and / or the first beam is accessible.

[0332] In this case, it can be understood that when the terminal device supports downlink coverage enhancement, the first indication information can be understood as a first field in the first system information for indicating whether the cell is prohibited for a terminal device that supports downlink coverage enhancement. When the terminal device does not support downlink coverage enhancement, the first indication information can be understood as information whether the UL configuration exists. Different types of terminal devices can determine the specific situation of the first cell through different fields, respectively. And the implicit indication of the cell situation for a UE that does not support downlink coverage enhancement through the UL configuration can effectively reduce the amount of data to be transmitted.

[0333] In this implementation, both the R19 UE that supports downlink coverage enhancement and the R19 UE that does not support downlink coverage enhancement can ignore the indication of cellBarred in the MIB message and cellBarredNTN in SIB1, and determine the cell situation and / or the beam situation according to the above-mentioned manner.

[0334] 4. Indication by cell list

[0335] In one implementation, the UE can be indicated whether the first cell is a campable cell and whether it is an accessible cell through a cell list.

[0336] Exemplarily, since the cells which the two types of UEs are not allowed to access and the cells which the two types of UEs are allowed to access are different, two cell lists can be configured respectively for the UE supporting downlink coverage enhancement and the UE not supporting downlink coverage enhancement in R19 UE.

[0337] Different cases are introduced as follows.

[0338] Case a, for the UE not supporting downlink coverage enhancement, a cell list of excluded cells is configured.

[0339] For example, a cell list of original excluded cells is configured.

[0340] Then, when the first cell is included in the cell list of excluded cells, the first indication information is used to indicate that the first cell is not allowed to camp on and / or is not allowed to camp on the first cell through the first beam. Conversely, when the first cell is not included in the cell list of excluded cells, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible.

[0341] In an implementation, the original excluded cells include cells supporting downlink coverage enhancement.

[0342] Case b, for the UE supporting downlink coverage enhancement, a cell list of excluded cells is configured.

[0343] For example, for the UE supporting downlink coverage enhancement, a new cell list of excluded cells (excluded cell list 2) can be configured.

[0344] Then, when the first cell is included in the cell list of new excluded cells, the first indication information is used to indicate that the first cell is not allowed to camp on and / or is not allowed to camp on the first cell through the first beam for the UE supporting downlink coverage enhancement. Conversely, when the first cell is not included in the cell list of excluded cells, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible.

[0345] In an implementation, in the cell list, the cells supporting downlink coverage enhancement are not included.

[0346] Case c, for the UE supporting downlink coverage enhancement, a cell list of allowed cells is configured.

[0347] For example, for the UE supporting downlink coverage enhancement, an allowed cell list (allowed cell list) can be configured, in which the cells supporting downlink coverage enhancement are included.

[0348] So, when the first cell is included in the cell list of allowed cells, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible. On the contrary, when the first cell is not included in the cell list of allowed cells, the first indication information is used to indicate that the first cell is not campable and / or not campable through the first beam.

[0349] Based on the above introduction, if a new cell list of excluded cells (excluded cell list 2) is configured for the UE supporting downlink coverage enhancement, the original cell list of excluded cells is only for the UE not supporting downlink coverage enhancement.

[0350] If the cell list of allowed cells is configured for the UE supporting downlink coverage enhancement, the original cell list of excluded cells is only for the UE supporting downlink coverage enhancement and the UE not supporting downlink coverage enhancement, and the UE supporting downlink coverage enhancement is further determined by the cell list of allowed cells. So, if the original cell list of excluded cells includes the first cell and the cell list of allowed cells also includes the first cell, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE supporting downlink coverage enhancement.

[0351] On the contrary, when the original cell list of excluded cells includes the first cell and the cell list of allowed cells does not include the first cell, the first indication information is used to indicate that the first cell is not campable and / or not campable through the first beam for the UE supporting downlink coverage enhancement. The original cell list of excluded cells including the first cell is used to indicate that the first cell is not campable and / or not campable through the first beam for the UE not supporting downlink coverage enhancement. On the contrary, when the cell list of excluded cells does not include the first cell, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible for the UE not supporting downlink coverage enhancement.

[0352] In summary, the access status of the cell can be simply and effectively indicated by the cell list.

[0353] It should be understood that the field values described above are only exemplary, and in actual implementation, the values of the fields can be arbitrarily extended according to actual needs, or the implementation of the fields indicating the corresponding meanings can also be arbitrarily set according to actual needs, as long as the fields can express the corresponding meanings. For example, the fields described above can express the meaning of whether the cell is prohibited.

[0354] The above describes various implementations of the network device indicating to the UE whether the first cell is accessible and whether it can be camped on through the first indication information in combination with specific embodiments.

[0355] Based on the above description, further, the network device may, for example, also set the cell information of the neighboring cell of the first cell (may also be referred to as first information) in the first system information and / or the second system information, or may also include the beam information of the neighboring beam of the first beam (may also be referred to as second information), wherein the first beam is the beam used to transmit the first indication information.

[0356] The possible implementations of the cell information and the beam information are described below respectively:

[0357] In one implementation, the cell information may, for example, contain the offset of the SSB period of the neighboring cell relative to the SSB period of the first cell. And the beam information may, for example, contain the offset of the SSB period of the neighboring beam relative to the SSB period of the first beam.

[0358] For this implementation, a small amount of cell information and / or beam information can be carried in the system information, which may require frequent updating of the cell information and / or beam information. Accordingly, if the cell information and / or beam information carried in the system information is updated, paging (paging) notification SI (system information) update need not be initiated, which can effectively save the consumption of signaling transmission.

[0359] And in another implementation, the cell information may, for example, also contain indication information (for example, which can be indicated by one byte) of whether the SSB period of the neighboring cell is extended. The beam information may, for example, also contain indication information (for example, which can be indicated by one byte) of whether the SSB period of the neighboring beam is extended. That is, it can be indicated whether the SSB period of the neighboring cell and / or the neighboring beam is lengthened, so that the UE can determine the situation of the neighboring cell and / or the neighboring beam.

[0360] Alternatively, the cell information may, for example, also contain the maximum lengthening time of the SSB period of the neighboring cell, and the beam information may, for example, also contain the maximum lengthening time of the SSB period of the neighboring beam. This way can also indicate whether the SSB period of the neighboring cell and / or the neighboring beam is lengthened, so that the UE can determine the situation of the neighboring cell and / or the neighboring beam.

[0361] Or, the cell information may also directly indicate the SSB period of the neighboring cell, and the beam information may also directly indicate the SSB period of the neighboring beam. In this way, the SSB period of the neighboring cell and / or the neighboring beam can be directly indicated to determine whether the SSB period of the neighboring cell and / or the neighboring beam is lengthened, so that the UE can determine the situation of the neighboring cell and / or the neighboring beam.

[0362] Or, the cell information may also indicate whether the neighboring cell is a cell for transmitting downlink common channels in wide beam, and the beam information may also directly indicate whether the neighboring beam is a wide beam. In this way, it can be indicated whether the neighboring cell and / or the neighboring cell is a cell and / or a channel for transmitting downlink common channels only, so that the UE can determine the situation of the neighboring cell and / or the neighboring beam.

[0363] By indicating the information of the neighboring cell and / or the neighboring beam to the UE, the UE can assist in selecting the remaining cell and / or the remaining beam, thereby improving the efficiency and success rate of the UE selecting the cell.

[0364] For example, the first system information can be SIB1, and the second system information can be SIB19, or the implementation of the first system information and the second system information can also be arbitrarily extended according to actual needs, and the embodiment does not limit this. For example, the offset of the SSB period described above can be included in SIB1, and the remaining cell information and / or beam information can be included in SIB19. Or, which cell information and beam information are specifically included in the first system information and the second system information can also be arbitrarily set according to actual needs, and the embodiment does not limit this.

[0365] On the basis of the above description, the subsequent behavior of the UE after the UE determines the first cell according to the first indication information will be introduced in combination with specific embodiments.

[0366] In one implementation, if the UE determines that the first cell is a cell that can be camped but cannot be accessed, or the UE determines that the first cell is a cell that can be camped, can be accessed, but cannot transmit data. At this time, it can be divided into the following cases:

[0367] Case a: the UE has uplink demand

[0368] In this case, because the UE has uplink demand (such as uplink data transmission or random access), and the first cell is not accessible or cannot transmit data, the UE can determine that the first cell is actually unusable, so the UE can not select the first cell in the cell selection or cell reselection process. Or, determine that the cell state of the first cell is prohibited.

[0369] Or, in the case that the UE has uplink demand, the UE HIA can reduce the priority of selecting the first cell as the camping cell in the process of selecting the cell according to the cell selection criteria (i.e. service criteria) and reselection criteria according to the first offset of the first cell.

[0370] For example, the first offset of the first cell can be added to the calculation process of the service criteria and the reselection criteria, so as to reduce the priority of selecting the first cell as the camping cell, that is, to camp in the first cell as little as possible. But in the case that there is no better choice, the UE can still choose to camp in the first cell first to receive system messages, and then perform cell switching.

[0371] Case b: the UE has no uplink demand

[0372] In the case that the first cell is a cell that can be camped but cannot be accessed, or in the case that the first cell is a cell that can be camped, can be accessed but cannot transmit data, it can be determined that the first cell is actually campable, that is, the UE can choose to camp in the first cell to receive system messages.

[0373] Then if the terminal device has no uplink demand, the terminal device can determine the first cell as a cell that can be camped. But it needs to be understood that the current indication that the terminal device determines that the first cell can be camped does not mean that the terminal device will choose to camp in the first cell, which depends on the actual situation, and the embodiment does not limit it.

[0374] Suppose the terminal device camps in the first cell, and then if the terminal device has uplink demand, and / or the first beam is adjusted to a beam used only for transmitting downlink common channels, the terminal device can directly perform at least one of the following operations: neighbor cell measurement, cell reselection, excluding the first cell as a candidate for cell selection or cell reselection.

[0375] Further, in the case that the first cell is a cell that can be camped, can be accessed but cannot transmit data, the terminal device can actually initiate random access in the first cell, and then in the process of random access, the UE can send a first request to the network device, the first request being used to indicate that the terminal device has data to be transmitted, to inform the network device that the UE has uplink demand.

[0376] And / or, the UE can also perform small packet data transmission SDT in the process of random access to improve the efficiency of data transmission.

[0377] On the basis of the above introduction, the cell indication method provided by the present application will be further introduced in combination with FIG. 14. FIG. 14 is an interactive signaling diagram of the cell indication method provided by the present application.

[0378] As shown in FIG. 14, the method comprises:

[0379] S1401, the network device sends first indication information to the terminal device. Wherein the terminal device can be a terminal device supporting R19 for example.

[0380] S1402, the terminal device determines whether the first cell can be camped and / or can be accessed according to the first indication information.

[0381] Wherein the specific indication mode of the first indication information can refer to the introduction of each embodiment above, which will not be repeated here.

[0382] In the present application, the network device can send the first indication information to the terminal device, so that whether the terminal device supporting downlink coverage enhancement or the terminal device not supporting downlink coverage enhancement can determine whether it can camp in the corresponding cell and / or determine whether it can access the corresponding cell, thereby making the terminal device can effectively determine the cell information on the basis of introducing downlink coverage enhancement technology.

[0383] It should be noted that the module names involved in the embodiments of the present application can be defined as other names, as long as the functions of the modules can be realized, and the names of the modules are not limited specifically.

[0384] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the embodiments of the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation portal for user to choose authorization or refusal.

[0385] The cell indication method of the embodiments of the present application has been described above, and the device provided by the embodiments of the present application for executing the above method will be described below. Those skilled in the art can understand that the method and the device can be combined and referred to each other, and the related device provided by the embodiments of the present application can execute the steps in the method of listing and sorting.

[0386] The cell indication method provided by the embodiments of the present application can be applied in electronic devices with communication function. The electronic device includes a terminal device, or the electronic device can also include a network device, and the specific device form of the terminal device and the network device can refer to the related description above, which will not be repeated here.

[0387] The structure of the electronic device will be briefly described below in combination with FIG. 15, and FIG. 15 is a hardware structure schematic diagram of the electronic device provided by the embodiments of the present application.

[0388] As shown in FIG. 15, the electronic device 150 includes: a processor 1501 and a memory 1502; the memory 1502 stores computer-executable instructions; and the processor 1501 executes the computer-executable instructions stored in the memory 1502, so that the electronic device 150 performs the above method.

[0389] When the memory 1502 is independently arranged, the electronic device further includes a bus 1503 for connecting the memory 1502 and the processor 1501.

[0390] The embodiments of the present application provide a chip. The chip includes a processor, and the processor is configured to invoke a computer program in a memory to execute the technical solutions in the above embodiments. The implementation principle and technical effects are similar to those of the above related embodiments, and will not be described here.

[0391] The embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. The computer program is executed by a processor to implement the above method. The method described in the above embodiments can be implemented by software, hardware, firmware or any combination thereof, in whole or in part. If implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. The computer-readable medium can include computer storage medium and communication medium, and can also include any medium that can carry computer programs from one place to another. The storage medium can be any target medium that can be accessed by a computer.

[0392] In a possible implementation, the computer-readable medium can include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that is targeted to carry desired program codes in the form of instructions or data structures and can be accessed by a computer. Moreover, any connection is appropriately called a computer-readable medium. For example, if software is transmitted from a website, server or other remote source using a coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology (such as infrared, radio and microwave), the coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology (such as infrared, radio and microwave) is included in the definition of the medium. As used herein, magnetic disks and optical disks include compact disks, laser disks, optical disks, digital versatile disks (DVD), floppy disks and Blu-ray disks, in which magnetic disks usually reproduce data magnetically, and optical disks reproduce data optically with a laser. Combinations of the above should also be included in the scope of computer-readable media.

[0393] The embodiment of the present application provides a computer program product, which comprises a computer program, and when the computer program is executed, the computer executes the above method.

[0394] The embodiment of the present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiment of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing devices produce a device for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0395] The above detailed description is further detailed for the purpose of the present application, technical solutions, and beneficial effects, and it should be understood that the above is only a specific embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A cell indication method, characterized by, The method is applied to a terminal device, and the method comprises: receiving first indication information sent by a network device; determining, according to the first indication information, whether a first cell can be camped on and / or can be accessed.

2. The method of claim 1, wherein, The first indication information comprises a first field, and the first field is used to indicate at least one of the following: being prohibited, not being prohibited, or not being allowed to access.

3. The method of claim 2, wherein, In a case where the first field indicates being prohibited, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on by a first beam of the first cell.

4. The method according to claim 2 or 3, characterized in that, In a case where the first field indicates not being allowed to access, the first indication information is used to indicate that the first cell cannot be accessed or a first beam of the first cell cannot be accessed.

5. The method according to any one of claims 1 to 4, characterized in that, The first indication information comprises a second field, and the second field is used to indicate being used only for transmitting a downlink common channel. The first indication information is used to indicate that the first cell cannot be accessed and / or a first beam of the first cell cannot be accessed.

6. The method according to any one of claims 1 to 5, characterized in that, The first indication information comprises a third field, and the third field is used to indicate whether the first cell can be accessed. In a case where the third field indicates not being allowed to access, the first indication information is used to indicate that the first cell cannot be accessed and / or a first beam of the first cell cannot be accessed.

7. The method according to any one of claims 1 to 6, characterized in that, The first indication information comprises a fourth field, and the fourth field is used to indicate that a first beam of the first cell is in a first state, in which the first beam can be used for initial access but cannot be used for data transmission. The first indication information is used to indicate that the first cell cannot be used for data transmission and / or a first beam of the first cell cannot be used for data transmission.

8. The method according to any one of claims 1 to 7, characterized in that, The first indication information comprises a fifth field and a sixth field. The fifth field is used to indicate, for a terminal device supporting downlink coverage enhancement, whether a cell is prohibited. The sixth field is used to indicate, for a terminal device not supporting downlink coverage enhancement, whether a cell is prohibited.

9. The method of claim 8, wherein, The sixth field is a field used to indicate, for a terminal device supporting non-terrestrial network (NTN) function, whether a cell is prohibited.

10. The method according to any one of claims 1 to 9, characterized in that, In a case where the terminal device does not support downlink coverage enhancement, the first indication information further comprises a synchronization signal and physical broadcast channel block (SSB) period corresponding to the first cell or a first beam of the first cell. If the SSB period is less than or equal to a first threshold, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible. If the SSB period is greater than the first threshold, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on by a first beam of the first cell.

11. The method according to any one of claims 1 to 10, characterized in that, In a case where the terminal device does not support downlink coverage enhancement, the first indication information is indicated by uplink configuration information. In a case where the uplink configuration information is empty or not configured, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on by a first beam of the first cell.

12. The method according to any one of claims 2-11, characterized in that, The first field is a field used to indicate, for a terminal device supporting NTN function, whether a cell is prohibited.

13. The method of claim 12, wherein, The first indication information further comprises a seventh field; when the first indication information comprises the seventh field, the terminal device supporting downlink coverage enhancement ignores the first field; If the seventh field indicates not being prohibited, the first indication information is used to indicate that the first cell is accessible and / or the first beam of the first cell is accessible; If the seventh field indicates being prohibited, the first indication information is used to indicate that the first cell is not campable and / or the first cell cannot be camped on the first cell through the first beam of the first cell.

14. The method according to any one of claims 1 to 13, characterized in that, The first indication information comprises a first cell list of excluded cells; In the case that the first cell is included in the first cell list, the first indication information is used to indicate that the first cell is not campable and / or the first cell cannot be camped on the first cell through the first beam of the first cell.

15. The method according to any one of claims 1 to 14, characterized in that, The first indication information comprises a second cell list of allowed cells; In the case that the first cell is included in the second cell list, the first indication information is used to indicate that the first cell is accessible and / or the first beam of the first cell is accessible.

16. The method according to any one of claims 1 to 15, characterized in that, In the case that the first cell is a campable but non-accessible cell, or in the case that the first cell is a campable, accessible but non-data-transmissible cell, if the terminal device has uplink demand, the first cell is not selected in the cell selection process or the cell state of the first cell is determined to be prohibited.

17. The method according to any one of claims 1 to 15, characterized in that, In the case that the first cell is a campable but non-accessible cell, or in the case that the first cell is a campable, accessible but non-data-transmissible cell, the method further comprises: If the terminal device has uplink demand, a first offset of the first cell is applied in the process of selecting a cell according to a cell selection criterion and a reselection criterion.

18. The method according to any one of claims 1 to 17, characterized in that, In the case that the first cell is a campable but non-accessible cell, or in the case that the first cell is a campable, accessible but non-data-transmissible cell, if the terminal device has no uplink demand, the terminal device is camped on the first cell; After being camped on the first cell, if the terminal device has uplink demand and / or the first beam is adjusted to be a beam only used for transmitting a downlink common channel, at least one of the following is performed: neighbor cell measurement, cell reselection, excluding the first cell as a candidate of cell selection or a candidate of cell reselection.

19. The method according to any one of claims 1 to 18, characterized in that, In the case that the first cell is a campable, accessible but non-data-transmissible cell, the method further comprises: Initiating random access to the first cell; In the random access process, a first request is sent to the network device, the first request being used to indicate that the terminal device has data to be transmitted; and / or, in the random access process, small packet data transmission (SDT) is performed.

20. The method of any one of claims 1-19, wherein, The first indication information further comprises first information of a neighboring cell; The first information includes at least one of the following: a SSB offset of a neighboring cell from the first cell, indication information of whether a SSB period of the neighboring cell is extended, a maximum lengthening time of the SSB period of the neighboring cell, the SSB period of the neighboring cell, and the SSB offset of the neighboring cell from the first cell.

21. A cell indication method, comprising: The method is applied to a network device and includes the following steps: sending, to a terminal device, first indication information, the first indication information being used to indicate whether a first cell can be camped on and / or can be accessed.

22. The method of claim 21, wherein, The first indication information includes a first field, and the first field is used to indicate at least one of the following: forbidden, not forbidden, or not allowed to access.

23. The method of claim 22, wherein, In a case where the first field indicates forbidden, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through a first beam of the first cell.

24. The method of claim 22 or 23, wherein, In a case where the first field indicates not allowed to access, the first indication information is used to indicate that the first cell cannot be accessed or a first beam of the first cell cannot be accessed.

25. The method of any one of claims 21-24, wherein, The first indication information includes a second field, and the second field is used to indicate that only a downlink common channel is transmitted. The first indication information is used to indicate that the first cell cannot be accessed and / or a first beam of the first cell cannot be accessed.

26. The method of any one of claims 21-25, wherein, The first indication information includes a third field, and the third field is used to indicate whether the first cell can be accessed. In a case where the third field indicates not allowed to access, the first indication information is used to indicate that the first cell cannot be accessed and / or a first beam of the first cell cannot be accessed.

27. The method of any one of claims 21-26, wherein, The first indication information includes a fourth field, and the fourth field is used to indicate that a first beam of the first cell is in a first state, in which the first beam can be used for initial access but cannot be used for data transmission. The first indication information is used to indicate that the first cell cannot be used for data transmission and / or a first beam of the first cell cannot be used for data transmission.

28. The method of any one of claims 21-27, wherein, The first indication information includes a fifth field and a sixth field. The fifth field is used to indicate whether a cell is forbidden for a terminal device supporting downlink coverage enhancement. The sixth field is used to indicate whether a cell is forbidden for a terminal device not supporting downlink coverage enhancement.

29. The method of claim 28, wherein, The sixth field is a field used to indicate whether a cell is forbidden for a terminal device supporting non-terrestrial network (NTN) function.

30. The method of any one of claims 21-29, wherein, In a case where the terminal device does not support downlink coverage enhancement, the first indication information further includes a synchronization signal and physical broadcast channel block (SSB) period corresponding to the first cell or a first beam of the first cell. If the SSB period is less than or equal to a first threshold value, the first indication information is used to indicate that the first cell is accessible and / or the first beam is accessible. If the SSB period is greater than the first threshold value, the first indication information is used to indicate that the first cell cannot be camped on and / or cannot be camped on the first cell through a first beam of the first cell.

31. The method of any one of claims 21-30, wherein, In a case where the terminal device does not support downlink coverage enhancement, the first indication information is indicated through uplink configuration information. In a case where the uplink configuration information is empty or is not configured, the first indication information is used to indicate that the first cell is not allowed to be camped on and / or the first cell is not allowed to be camped on by the first beam of the first cell.

32. The method of any one of claims 22-31, wherein, The first field is a field used to indicate whether a cell is prohibited for a terminal device supporting an NTN function.

33. The method of claim 32, wherein, The first indication information further includes a seventh field; when the first indication information includes the seventh field, a terminal device supporting downlink coverage enhancement ignores the first field. If the seventh field indicates that it is not prohibited, the first indication information is used to indicate that the first cell is allowed to be accessed and / or the first beam of the first cell is allowed to be accessed. If the seventh field indicates that it is prohibited, the first indication information is used to indicate that the first cell is not allowed to be camped on and / or the first cell is not allowed to be camped on by the first beam of the first cell.

34. The method of any one of claims 21-33, wherein, The first indication information includes a first cell list of excluded cells. In a case where the first cell is included in the first cell list, the first indication information is used to indicate that the first cell is not allowed to be camped on and / or the first cell is not allowed to be camped on by the first beam of the first cell.

35. The method of any one of claims 21-34, wherein, The first indication information includes a second cell list of allowed cells. In a case where the first cell is included in the second cell list, the first indication information is used to indicate that the first cell is allowed to be accessed and / or the first beam of the first cell is allowed to be accessed.

36. The method of any one of claims 21-35, wherein, The first indication information further includes first information of a neighboring cell. The first information includes at least one of the following: SSB offset of the neighboring cell from the first cell, indication information of whether the SSB period of the neighboring cell is extended, maximum lengthening time of the SSB period of the neighboring cell, SSB period of the neighboring cell, and SSB offset of the neighboring cell from the first cell.

37. A terminal device, comprising: The terminal device includes one or more processors and a memory. The memory is coupled to the one or more processors, and the memory is configured to store computer program code including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the electronic device to perform the method according to any one of claims 1 to 20.

38. A network device, comprising: The network device includes one or more processors and a memory. The memory is coupled to the one or more processors, and the memory is configured to store computer program code including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the electronic device to perform the method according to any one of claims 21 to 36.

39. A chip system, characterized by The chip system is applied to an electronic device, and the chip system includes one or more processors configured to invoke computer instructions to cause the electronic device to perform the method according to any one of claims 1 to 36.

40. A computer-readable storage medium, characterized in that, The computer readable storage medium includes computer instructions configured to cause an electronic device to perform the method according to any one of claims 1 to 36 when the computer instructions are executed on the electronic device.

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