Communication method and device

Abstract

The embodiment of the invention provides a communication method and device. In the method, a network device can send first information indicating the type of a terminal device allowed to be accessed by the network device, so that after receiving the first information, the terminal device in the coverage area of the terminal device can judge whether the terminal device is the terminal device allowed to be accessed by the network device according to the first information and the condition of the terminal device; therefore, whether to access the network equipment or not is determined, and the situation that the terminal equipment initiates the access process to the network equipment in the scene that the network equipment is not allowed to access, and finally the access process initiated by the terminal equipment fails is avoided. According to the method, the terminal equipment can select the appropriate network equipment to access through the first information sent by the network equipment, and finally, the terminal equipment in the NTN scene can be accurately accessed to the network equipment, so that the access success rate is improved, and the power consumption of the terminal equipment is saved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] Compared with traditional terrestrial networks (such as the 4th Generation (4G) mobile communication system and the 5th Generation (5G) mobile communication system), non-terrestrial networks (NTN) have the characteristics of wider coverage, faster speed and lower cost. Especially in places where terrestrial networks cannot be directly deployed, such as the sea, desert, and air, it can serve as a supplement or extension of the terrestrial network to achieve the purpose of wide-area seamless coverage and effectively solve the Internet access problem in areas lacking communication infrastructure.

[0003] As a typical example of NTN, satellite communication has the characteristics of long communication distance, large coverage area, and flexible networking, and plays an irreplaceable role in space communication, aviation communication, military communication, emergency rescue communication, high-speed mobility, etc. Satellite communication is introduced into the traditional communication system, and the base station or part of the base station function is deployed on the satellite, which can not only provide seamless coverage for terminal equipment, but also avoid the impact of natural disasters and ensure the reliability of the communication system.

[0004] At present, different countries or regions have different laws and regulations on high-frequency band communications in NTN scenarios. These laws and regulations stipulate the types of network equipment and terminal equipment in NTN, the specific frequency bands used, etc. However, the 3rd Generation Partnership Project (3GPP) has not yet discussed the laws and regulations that devices in NTN scenarios must comply with. In addition, the laws and regulations of different countries or regions will also change with the development of communications, and the types, forms and services of terminal equipment are also relatively rich, which greatly restricts the access of terminal equipment and thus affects the service realization of terminal equipment. Summary of the invention

[0005] The present application provides a communication method and apparatus for ensuring that a terminal device in an NTN scenario can access a network device.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a network device, where the network device can refer to the network device itself, or a processor, module, chip, or chip system in the network device that implements the method. The method includes the following steps:

[0007] The network device sends first information; wherein, the first information is used to indicate the types of terminal devices that the network device allows to access; the types of terminal devices that the network device allows to access include: fixed terminal device types and / or mobile terminal device types, and the network device is a network device applied in a non-terrestrial network NTN.

[0008] In this method, the network device can send the first information indicating the type of terminal device that the network device allows to access. In this way, after receiving the first information, the terminal device within its coverage can determine whether it is a terminal device that the network device allows to access based on the first information and its own situation, and thus decide whether to access the network device, thereby avoiding the situation where the terminal device initiates an access process to the network device in a scenario where the network device does not allow access, which ultimately leads to the failure of the access process initiated by the terminal device. Through this method, the terminal device can select a suitable network device to access through the first information sent by the network device, and ultimately ensure that the terminal device in the NTN scenario can accurately access the network device, improve the access success rate, and save the power consumption of the terminal device.

[0009] In one possible design, the network device may broadcast the first information so that terminal devices within the coverage of the network device can receive the first information. For example, the network device may broadcast the first information by carrying it in a system message (e.g., a main information block (MIB) or a system information block (SIB)).

[0010] In one possible design, the mobile terminal device type includes multiple sub-mobile terminal device types; when the terminal device type allowed to access by the network device includes the mobile terminal device type, the first information is also used to indicate at least one sub-mobile terminal device type allowed to access by the network device.

[0011] Through this design, the network device can notify the terminal devices within the coverage area through the first information of at least one sub-mobile terminal device that it allows to access, so that the terminal devices that belong to the mobile terminal device type and whose sub-mobile terminal device type is included in at least one sub-mobile terminal device allowed to access by the network device can initiate an access process to the network device.

[0012] In a possible design, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0013] In a possible design, when the terminal device types allowed to access by the network device include the fixed terminal device types, the first information is also used to indicate a judgment condition that meets the fixed terminal device types.

[0014] Through this design, the network device can notify the terminal devices within the coverage area through the first information of the judgment conditions for the type of fixed terminal devices allowed to access, so that the terminal devices that belong to the fixed terminal device type and meet the judgment conditions can initiate an access process to the network device.

[0015] In a possible design, the judgment condition includes any one of the following:

[0016] The terminal equipment is located in a fixed position;

[0017] The terminal device moves within a set geographical range;

[0018] The terminal device moves across a set number of geographical locations; or

[0019] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0020] In one possible design, the fixed terminal device type is a fixed satellite service FSS terminal device.

[0021] In one possible design, the first information is also used to indicate the services that the network device is allowed to implement.

[0022] Through this design, the network device can notify the terminal devices within the coverage area of ​​the services it is allowed to implement through the first information, so that the terminal devices can determine whether to initiate an access process to the network device based on their own services to be implemented and the services allowed to be implemented by the network device.

[0023] In one possible design, the network device may also receive a wireless resource control (RRC) connection establishment request message from a first terminal device; wherein the RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the first terminal device, and the third information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: the fixed terminal device type or the mobile terminal device type; and an RRC connection establishment completion message is sent to the first terminal device.

[0024] Through this design, after randomly accessing a network device, the terminal device can report its own type or its own antenna configuration to the network device through the RRC connection establishment process, so that the network device can decide whether to allow the terminal device to continue access based on this information, thereby avoiding the situation where the network device does not allow access or cannot provide services, and continuing to execute the RRC connection establishment process ultimately leads to the failure of the RRC connection of the terminal device.

[0025] In a possible design, when the RRC connection establishment request message includes the third information, the network device can also determine the beam information of the first terminal device and / or the service information that can provide services to the first terminal device based on the third information.

[0026] Through this design, after the network device determines that it can provide access service to the first terminal device based on the antenna configuration reported by the first terminal device, it can further determine some working parameters, etc., so as to better serve the first terminal device.

[0027] In one possible design, the antenna configuration of the first terminal device includes at least one of the following:

[0028] The antenna type of the uplink and / or downlink antenna of the first terminal device; or the beam adjustment capability of the first terminal device.

[0029] In a possible design, the network device may also receive a radio resource control RRC connection establishment request message from the first terminal device; wherein the RRC connection establishment request message includes second information; the second information is used to indicate a type to which the first terminal device belongs, and the type to which the first terminal device belongs is: the fixed terminal device type or the mobile terminal device type; and before sending the RRC connection establishment completion message to the first terminal device, perform the following steps:

[0030] Determining that the type switching frequency of the first terminal device is less than a set frequency threshold; or

[0031] When the type of the first terminal device is the fixed terminal device type, determining, based on the location information of the first terminal device, a duration for which the first terminal device is in the fixed terminal device type, and determining that the duration is greater than a set duration threshold; or determining, based on the location information of the first terminal device, that the first terminal device meets the judgment condition for the fixed terminal device type; or

[0032] When the type to which the first terminal device belongs is the mobile terminal device type, and the second information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs, it is determined that at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs; wherein the mobile terminal device type includes multiple sub-mobile terminal device types.

[0033] Through this design, the network device can further determine whether to allow the first terminal device to continue access based on the type switching frequency of the first terminal device, the duration that the first terminal device is in the fixed terminal device type, or the sub-mobile terminal device type to which the first terminal device belongs.

[0034] In a possible design, the second information is also used to indicate the service to be implemented by the first terminal device. Through this design, the network device can determine whether to allow the first terminal device to continue access based on the service to be implemented by the first terminal device and the service allowed to be implemented by the network device.

[0035] Optionally, the network device may determine the subsequent execution process according to the service to be implemented by itself through, but not limited to, the following two implementation methods:

[0036] Implementation method 1: The services that the network device allows to be implemented can be used by the network device to further judge the terminal device that meets the terminal device type allowed to access the network device, and determine whether to allow the terminal device to continue to access, as follows:

[0037] When the type of terminal devices allowed to access by the network device includes the type to which the first terminal device belongs, and the service allowed to be implemented by the network device includes the service to be implemented by the first terminal device indicated by the second information, the network device allows the first terminal device to continue to access;

[0038] When the terminal device types allowed to access by the network device include the type to which the first terminal device belongs, but the services allowed to be implemented by the network device do not include the services to be implemented by the first terminal device indicated by the second information, the network device does not allow the first terminal device to continue to access.

[0039] Implementation method 2: The services that the network device allows to implement are special access permissions set for the network device; the priority of the services that the network device allows to implement is higher than the priority of the terminal device type that the network device allows to access, that is, regardless of whether the type of the terminal device is included in the terminal device type that the network device allows to access, as long as the service to be implemented by the terminal device (the service requested by the terminal device to implement) is included in the services that the network device allows to implement, then the network device will allow the terminal device to continue to access. The specific steps are as follows:

[0040] When the services allowed by the network device include the services to be implemented by the first terminal device indicated by the second information, the network device may no longer determine whether the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, but directly allow the first terminal device to continue accessing; when the services allowed by the network device do not include the services to be implemented by the first terminal device indicated by the second information, the network device may continue to determine whether the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, thereby determining whether to allow the first terminal device to continue accessing. When the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, the network device allows the first terminal device to continue accessing; when the types of terminal devices allowed to access by the network device do not include the type to which the first terminal device belongs, the network device does not allow the first terminal device to continue accessing.

[0041] Alternatively, when the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, the network device no longer determines whether the services allowed to be implemented by the network device include the services to be implemented by the first terminal device indicated by the second information, but directly allows the first terminal device to continue accessing; when the types of terminal devices allowed to access by the network device do not include the type to which the first terminal device belongs, the network device may continue to determine whether the services allowed to be implemented by the network device include the services to be implemented by the first terminal device indicated by the second information, thereby determining whether to allow the first terminal device to continue accessing. When the services allowed to be implemented by the network device include the services to be implemented by the first terminal device, the network device allows the first terminal device to continue accessing; when the services allowed to be implemented by the network device do not include the services to be implemented by the first terminal device, the network device does not allow the first terminal device to continue accessing.

[0042] In one possible design, the network device may also broadcast fourth information; the fourth information is used to indicate the operating track type or operating position information of the network device.

[0043] Through this design, the network device can send the fourth information indicating its own running track type or running location information, so that the terminal device within its coverage can know the running track type or running location information of the network device, and then can choose whether to access the network device according to its own type and the configuration of the terminal device itself. In this way, the terminal device in the NTN scenario can access the appropriate network device that meets its own configuration, improve the access success rate, and ultimately ensure the communication quality of the terminal device.

[0044] In one possible design, the network device may also send measurement configuration information to a second terminal device that has connected to the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0045] Through this design, the network equipment can indicate the operating track type or operating position information corresponding to each frequency point to be measured during the measurement configuration of the terminal equipment, so that the terminal equipment can choose to access the neighboring cell on a specific frequency point during the cell switching or cell reselection process, thereby accessing the network equipment with the operating track type or operating position information that matches its own antenna configuration, ultimately ensuring the communication quality of the terminal equipment.

[0046] In one possible design, the network device is a geosynchronous orbit GEO satellite, a highly elliptical orbit HEO satellite, a medium earth orbit MEO satellite, or a low earth orbit LEO satellite.

[0047] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device, where the terminal device can refer to the terminal device itself, or a processor, module, chip, or chip system that implements the method in the terminal device. The method includes the following steps:

[0048] A terminal device receives first information from a network device; wherein the first information is used to indicate the types of terminal devices that the network device allows to access; the types of terminal devices that the network device allows to access include: fixed terminal device types and / or mobile terminal device types; the terminal device initiates an access process to the network device or starts a cell reselection process based on the first information.

[0049] In one possible design, the terminal device can receive the first information broadcast by the network device.

[0050] In a possible design, the terminal device may initiate an access process to the network device or start a cell reselection process according to the first information through the following steps:

[0051] When the terminal device types allowed to access by the network device include the type to which the terminal device belongs, an access process is initiated to the network device; or when the terminal device types allowed to access by the network device do not include the type to which the terminal device belongs, a cell reselection process is started.

[0052] In one possible design, the mobile terminal device type includes multiple sub-mobile terminal device types; when the terminal device type allowed to access by the network device includes the mobile terminal device type, the first information is also used to indicate at least one sub-mobile terminal device type allowed to access by the network device; based on this, when the terminal device type allowed to access by the network device includes the type to which the terminal device belongs, the terminal device can initiate an access process to the network device through the following steps: when the type to which the terminal device belongs is the mobile terminal device type, when the terminal device type allowed to access by the network device includes the mobile terminal device type, and at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the terminal device belongs, initiate an access process to the network device; in addition, when the type to which the terminal device belongs is the mobile terminal device type, when the terminal device type allowed to access by the network device includes the mobile terminal device type, and at least one sub-mobile terminal device type allowed to access by the network device does not include the sub-mobile terminal device type to which the terminal device belongs, the terminal device can also start a cell reselection process.

[0053] In a possible design, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0054] In a possible design, when the terminal device type allowed to access by the network device includes the fixed terminal device type, the first information is also used to indicate a judgment condition that meets the fixed terminal device type; based on this, when the terminal device type allowed to access by the network device includes the type to which the terminal device belongs, the terminal device can initiate an access process to the network device or start a cell reselection process according to the first information through the following steps:

[0055] In the case where the type of the terminal device is the fixed terminal device type, when the types of terminal devices allowed to access the network device include the fixed terminal device type, and the terminal device meets the judgment condition, an access process is initiated to the network device; or in the case where the type of the terminal device is the fixed terminal device type, when the types of terminal devices allowed to access the network device include the fixed terminal device type, and the terminal device does not meet the judgment condition, a cell reselection process is started.

[0056] In a possible design, the judgment condition includes any one of the following:

[0057] The terminal equipment is located in a fixed position;

[0058] The terminal device moves within a set geographical range;

[0059] The terminal device moves across a set number of geographical locations; or

[0060] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0061] In one possible design, the fixed terminal device type is a fixed satellite service FSS terminal device.

[0062] In a possible design, the first information is further used to indicate the services that the network device is allowed to implement; based on this, the terminal device can initiate an access process to the network device or start a cell reselection process according to the first information through the following steps:

[0063] When the services allowed by the network device include the services to be implemented by the terminal device, an access process is initiated to the network device; or when the services allowed by the network device do not include the services to be implemented by the terminal device, a cell reselection process is started.

[0064] Taking the first terminal device as an example, optionally, the first terminal device can, but is not limited to, use the following two specific implementation methods to determine the subsequent execution process based on its own business to be implemented.

[0065] Implementation method 1: The services that the network device indicated by the first information allows to be implemented can be used by the terminal device that meets the terminal device type allowed to access by the network device to further determine to initiate an access process or start a cell reselection process, as follows:

[0066] When the type of terminal devices allowed to access by the network device indicated by the first information includes the type to which the first terminal device belongs, and the service allowed to be implemented by the network device indicated by the first information includes the service to be implemented by the first terminal device, the first terminal device initiates an access process to the network device;

[0067] When the terminal device type allowed to access by the network device indicated by the first information includes the type to which the first terminal device belongs, but the service allowed to be implemented by the network device indicated by the first information does not include the service to be implemented by the first terminal device, the first terminal device initiates a cell reselection process.

[0068] Implementation method 2: The services that the network device indicated by the first information allows to be implemented are special access permissions set for the network device. The priority of the services that the network device allows to be implemented is higher than the priority of the terminal device types that the network device allows to access. That is, regardless of whether the type of the terminal device is included in the terminal device types that the network device allows to access, as long as the service to be implemented by the terminal device (the service that the terminal device requests to implement) is included in the services that the network device allows to be implemented, then the network device will allow the terminal device to access, and the terminal device can initiate an access process to the network device. The specific steps are as follows:

[0069] When the service allowed to be implemented by the network device indicated by the first information includes the service to be implemented by the first terminal device, the first terminal device no longer determines whether its own type is included in the terminal device types allowed to access the network device, but directly initiates an access process to the network device; when the service allowed to be implemented by the network device indicated by the first information does not include the service to be implemented by the first terminal device, the first terminal device continues to determine whether to initiate an access process to the network device or start a cell reselection process based on whether its own type is included in the terminal device types allowed to access the network device;

[0070] Alternatively, when the type of terminal devices allowed to access by the network device indicated by the first information includes the type to which the first terminal device belongs, the first terminal device no longer determines whether the service to be implemented by itself is included in the services allowed by the network device, but directly initiates an access process to the network device; when the type of terminal devices allowed to access by the network device indicated by the first information does not include the type to which the first terminal device belongs, the first terminal device continues to determine whether to initiate an access process to the network device or start a cell reselection process based on whether the service to be implemented by itself is included in the services allowed by the network device.

[0071] In an embodiment of the present application, the communication system may stipulate that the terminal device adopts one of the implementation methods to determine whether to initiate an access process or start a cell reselection process through the services to be implemented by itself and the services allowed to be implemented by the network device. Optionally, the network device may also instruct the terminal device which implementation method to adopt by sending information. For example, when the first information also indicates that the priority of the service allowed to be implemented by the network device is higher than the priority of the type of terminal device allowed to access by the network device, the terminal device adopts the second implementation method; when the first information also indicates that the priority of the service allowed to be implemented by the network device is lower than the priority of the type of terminal device allowed to access by the network device, the terminal device adopts the first implementation method.

[0072] In one possible design, after initiating an access process to the network device, the terminal device may also send an RRC connection establishment request message to the network device; wherein the RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the terminal device, and the third information is used to indicate the antenna configuration of the terminal device; the type of the terminal device is: the fixed terminal device type or the mobile terminal device type; receiving an RRC connection establishment completion message from the network device, or receiving an RRC connection rejection message from the network device.

[0073] In one possible design, the antenna configuration of the terminal device includes at least one of the following:

[0074] The antenna type of the uplink and / or downlink antenna of the terminal device; or the beam adjustment capability of the terminal device.

[0075] In one possible design, the second information is also used to indicate the service to be implemented by the terminal device.

[0076] In a possible design, the terminal device may initiate an access process to the network device according to the first information through the following steps:

[0077] Receive fourth information broadcast by the network device; the fourth information is used to indicate the running track type or running position information of the network device; and initiate an access process to the network device according to the first information and the fourth information.

[0078] In a possible design, the terminal device can also receive measurement configuration information from the network device after accessing the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or an operating position information; according to the antenna configuration of the terminal device, a target frequency point corresponding to the target operating track type or the target operating position information is selected from the at least one frequency point to be measured; cell measurement is performed on the neighboring cell at the target frequency point; or the neighboring cell at the target frequency point is selected as the target cell for cell switching or cell reselection.

[0079] The technical effects that can be achieved in the second aspect can refer to the description of the technical effects that can be achieved in the first aspect mentioned above.

[0080] In a third aspect, an embodiment of the present application provides a communication method, which can be applied to a network device, where the network device can refer to the network device itself, or a processor, module, chip, or chip system that implements the method in the network device. The method includes the following steps:

[0081] A network device receives an RRC connection establishment request message from a first terminal device; wherein the RRC connection establishment request message includes at least one of the following: first information or second information, the first information is used to indicate the type of the first terminal device, and the second information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: a fixed terminal device type or a mobile terminal device type; then, the network device sends an RRC connection establishment completion message to the terminal device.

[0082] In this method, after randomly accessing a network device, the terminal device can report its own type or antenna configuration to the network device through the RRC connection establishment process, so that the network device can decide whether to allow the terminal device to continue access based on this information, thereby avoiding the situation where the network device does not allow access or cannot provide services, and continuing to execute the RRC connection establishment process ultimately leads to the failure of the RRC connection of the terminal device. Through this method, the terminal device can access a suitable network device (i.e., the network device is allowed to access or can provide services for it) by reporting its own capability information to the network device, ultimately ensuring that the terminal device in the NTN scenario can access the network device, improving the access success rate, and saving the power consumption of the terminal device.

[0083] In one possible design, when the RRC connection establishment request message includes the first information, the type of terminal devices allowed to access by the network device includes the type to which the first terminal device belongs.

[0084] In a possible design, when the RRC connection establishment request message includes the first information, the network device may further perform the following steps before sending the RRC connection establishment complete message to the terminal device:

[0085] Determining that the type switching frequency of the first terminal device is less than a set frequency threshold; or

[0086] When the type of the first terminal device is the fixed terminal device type, determining, based on the location information of the terminal device, a duration for which the first terminal device is in the fixed terminal device type, and determining that the duration is greater than a set duration threshold; or determining, based on the location information of the first terminal device, that the first terminal device meets the judgment condition for the fixed terminal device type; or

[0087] When the type to which the first terminal device belongs is the mobile terminal device type, and the first information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs, it is determined that at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs; wherein the mobile terminal device type includes multiple sub-mobile terminal device types.

[0088] Through this design, the network device can further determine whether to allow the first terminal device to continue access based on the type switching frequency of the first terminal device, the duration that the first terminal device is in the fixed terminal device type, or the sub-mobile terminal device type to which the first terminal device belongs.

[0089] In a possible design, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0090] In a possible design, the judgment condition includes:

[0091] The terminal equipment is located in a fixed position;

[0092] The terminal device moves within a set geographical range;

[0093] The terminal device moves across a set number of geographical locations; or

[0094] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0095] In one possible design, the fixed terminal device type is a fixed satellite service FSS terminal device.

[0096] In one possible design, when the RRC connection establishment request message includes the second information, the method further includes:

[0097] Based on the second information, beam scheduling information of the first terminal device and / or service information that can provide services for the first terminal device is determined.

[0098] In one possible design, the antenna configuration of the first terminal device includes at least one of the following:

[0099] The antenna type of the uplink and / or downlink antenna of the first terminal device; or the beam adjustment capability of the first terminal device.

[0100] In a possible design, when the RRC connection establishment request message includes the first information, the first information is also used to indicate the service to be implemented by the first terminal device; the services allowed to be implemented by the network device include the services to be implemented by the first terminal device.

[0101] Through this design, the network device can determine whether to allow the first terminal device to continue access based on the services to be implemented by the first terminal device and the services that the network device is allowed to implement.

[0102] In one possible design, the network device may also broadcast third information; the third information is used to indicate the operating track type or operating position information of the network device.

[0103] In one possible design, the network device may also send measurement configuration information to the first terminal device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0104] In one possible design, the network device is a geosynchronous orbit GEO satellite, a highly elliptical orbit HEO satellite, a medium earth orbit MEO satellite, or a low earth orbit LEO satellite.

[0105] The technical effects that can be achieved by some designs in the third aspect can refer to the description of the technical effects that can be achieved by the above-mentioned first aspect.

[0106] In a fourth aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device (taking a first terminal device as an example for illustration). The first terminal device here can refer to the first terminal device itself, or to a processor, module, chip, or chip system that implements the method in the first terminal device. The method includes the following steps:

[0107] The first terminal device sends an RRC connection establishment request message to a network device; wherein the RRC connection establishment request message includes at least one of the following: first information or second information, the first information is used to indicate the type of the first terminal device, and the second information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: a fixed terminal device type or a mobile terminal device type; the first terminal device receives an RRC connection establishment completion message from the network device, or receives an RRC connection rejection message from the network device.

[0108] In one possible design, the mobile terminal device type includes multiple sub-mobile terminal device types; based on this, when the RRC connection establishment request message includes the first information and the type to which the first terminal device belongs is the mobile terminal device type, the first information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs.

[0109] In a possible design, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0110] In one possible design, the fixed terminal device type is a fixed satellite service FSS terminal device.

[0111] In one possible design, the antenna configuration of the first terminal device includes at least one of the following:

[0112] The antenna type of the uplink and / or downlink antenna of the first terminal device; or the beam adjustment capability of the first terminal device.

[0113] In a possible design, when the RRC connection establishment request message includes the first information, the first information is also used to indicate the service to be implemented by the first terminal device.

[0114] In one possible design, the first terminal device can also receive third information broadcast by the network device; wherein the third information is used to indicate the operating track type or operating location information of the network device; and based on the third information, initiate an access process to the network device.

[0115] In a possible design, the first terminal device can also receive measurement configuration information from the network device after receiving the RRC connection establishment completion message from the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or an operating position information; according to the antenna configuration of the first terminal device, a target frequency point corresponding to the target operating track type or the target operating position information is selected from the at least one frequency point to be measured; cell measurement is performed on the neighboring cell at the target frequency point; or the neighboring cell at the target frequency point is selected as the target cell for cell switching or cell reselection.

[0116] The technical effects that can be achieved in the fourth aspect can refer to the description of the technical effects that can be achieved in the third aspect mentioned above.

[0117] In a fifth aspect, an embodiment of the present application provides a communication method, which can be applied to a network device, where the network device can refer to the network device itself, or a processor, module, chip, or chip system in the network device that implements the method. The method includes the following steps:

[0118] The network device sends first information; the first information is used to indicate the running track type or running position information of the network device.

[0119] Through this method, the network device can send the first information indicating its own running track type or running location information, so that the terminal device within its coverage can know the running track type or running location information of the network device, and then can freely choose whether to access the network device according to the terminal device's own configuration. In this way, the terminal device in the NTN scenario can access the appropriate network device that meets its own configuration, improve the access success rate, and ultimately ensure the communication quality of the terminal device and save the power consumption of the terminal device.

[0120] In one possible design, the network device may broadcast the first information.

[0121] In a sixth aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device (taking a first terminal device as an example for illustration). The first terminal device here can refer to the first terminal device itself, or to a processor, module, chip, or chip system that implements the method in the first terminal device. The method includes the following steps:

[0122] The first terminal device receives first information from a network device, where the first information is used to indicate the running track type or running location information of the network device; and initiates an access process to the network according to the first information.

[0123] In one possible design, the first terminal device receives the first information broadcast by the network device.

[0124] The technical effects that can be achieved in the sixth aspect can refer to the description of the technical effects that can be achieved in the fifth aspect mentioned above.

[0125] In a seventh aspect, an embodiment of the present application provides a communication method, which can be applied to a network device, where the network device can refer to the network device itself, or a processor, module, chip, or chip system that implements the method in the network device. The method includes the following steps:

[0126] The network device sends measurement configuration information to the first terminal device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0127] Through this method, the network device can indicate the operating track type or operating position information corresponding to each frequency point to be measured during the measurement configuration of the terminal device, so that the terminal device can choose to access the neighboring cell on a specific frequency point during the cell switching or cell reselection process, thereby accessing the network device with the operating track type or operating position information that matches its own antenna configuration, ultimately ensuring the communication quality of the terminal device.

[0128] In an eighth aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device (taking a first terminal device as an example for illustration). The first terminal device here can refer to the first terminal device itself, or to a processor, module, chip, or chip system that implements the method in the first terminal device. The method includes the following steps:

[0129] The first terminal device receives measurement configuration information from the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or an operating position information; according to the antenna configuration of the first terminal device, a target frequency point corresponding to the target operating track type or the target operating position information is selected from the at least one frequency point to be measured; cell measurement is performed on a neighboring cell at the target frequency point; or a neighboring cell at the target frequency point is selected as a target cell for cell switching or cell reselection.

[0130] The technical effects that can be achieved in the eighth aspect can refer to the description of the technical effects that can be achieved in the seventh aspect mentioned above.

[0131] In a ninth aspect, an embodiment of the present application provides a communication device, comprising a unit for executing each step of any one of the first to eighth aspects above. Optionally, the communication device may include a communication unit and a processing unit; the communication unit is used to receive and send data, and the processing unit is used to execute the method provided in any one of the above aspects.

[0132] In a tenth aspect, an embodiment of the present application provides a communication device, comprising a transceiver and a processor; wherein the transceiver is used to receive and send signals; the processor is used to execute program instructions so that the communication device executes the method provided in any of the above aspects. Optionally, the communication device also includes a memory. The memory is used to store program instructions; the processor can read the program instructions in the memory so that the communication device executes the method provided in any of the above aspects.

[0133] In the eleventh aspect, an embodiment of the present application provides a communication device, comprising at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to execute the method provided in any one of the above aspects of the present application.

[0134] In the twelfth aspect, an embodiment of the present application provides a communication system, comprising: a network device for executing the first aspect and a terminal device for executing the second aspect; or a network device for executing the third aspect and a terminal device for executing the fourth aspect; or a network device for executing the fifth aspect and a terminal device for executing the sixth aspect; or a network device for executing the seventh aspect and a terminal device for executing the eighth aspect.

[0135] In a thirteenth aspect, the embodiment of the present application further provides a computer program product, which, when executed on a computer, enables the computer to execute the method provided in any of the above aspects. Optionally, the computer may be a communication device such as a terminal device or a network device.

[0136] In a fourteenth aspect, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer executes the method provided in any of the above aspects. Optionally, the computer can be a communication device such as a terminal device or a network device.

[0137] In the fifteenth aspect, the embodiments of the present application further provide a chip, which is used to read a computer program stored in a memory and execute the method provided in any of the above aspects. Optionally, the chip may include a processor, which is coupled to the memory and is used to read the computer program stored in the memory to implement the method provided in the above embodiments. Optionally, the chip may also include components such as a memory, a communication interface, and a power supply module. The memory is used to store a computer program; the communication interface is used to receive and send data; and the power supply unit is used to power the processor.

[0138] In a sixteenth aspect, an embodiment of the present application further provides a chip system, which includes a processor for supporting a computer device to implement the method provided in any of the above aspects. In a possible design, the chip system also includes a memory, which is used to store the necessary programs and data of the computer device. The chip system can be composed of a chip, or it can include a chip and other discrete devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0139] Figure 1 A schematic diagram of a typical application scenario of a satellite-ground fusion network provided in an embodiment of the present application;

[0140] Figure 2 A flow chart of a communication method provided in an embodiment of the present application;

[0141] Figure 3 A flow chart of a communication method provided in an embodiment of the present application;

[0142] Figure 4 A flowchart of another communication method provided in an embodiment of the present application;

[0143] Figure 5 A flowchart of another communication method provided in an embodiment of the present application;

[0144] Figure 6 A structural diagram of a communication device provided in an embodiment of the present application;

[0145] Figure 7 A structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0146] The present application provides a communication method and device to ensure that a terminal device in an NTN scenario can access a network device. The method and the device are based on the same technical concept. Since the method and the device solve the problem in a similar manner, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0147] Some terms in this application are explained below to facilitate understanding by those skilled in the art.

[0148] 1) NTN is proposed in contrast to traditional terrestrial networks. It refers to a network established using non-terrestrial communication technologies, which may include but is not limited to networks that use spectrum resources on satellite platforms, unmanned aerial vehicles (UAV) platforms, or high altitude platform stations (HAPS) to provide communication services.

[0149] For example, NTN may include, but is not limited to, satellite systems, UAV communication systems, and HAPS systems. According to the height of the satellite from the earth's surface (i.e., the satellite orbit height), the satellite system can be divided into geostationary earth orbit (GEO or GSO) satellite system, highly elliptical orbit (HEO) satellite system, medium earth orbit (MEO) satellite system, and low earth orbit (LEO) satellite system.

[0150] The GEO satellite system may also be referred to as a geostationary orbit. The HEO satellite system, MEO satellite system and LEO satellite system may also be collectively referred to as a non-geostationary earth orbit (NGEO or NGSO) satellite system, or a non-geostationary orbit satellite system.

[0151] Correspondingly, according to the different types of satellite systems, satellites in the satellite system can also be divided into GEO satellites, HEO satellites, MEO satellites, LEO satellites, etc.

[0152] Compared with terrestrial communication networks, NTN has the characteristics of wider coverage, higher path loss, greater latency, faster speed and lower cost. As the research on NTN increases, the 3rd Generation Partnership Project (3GPP) has also conducted standardization research on NTN, and is committed to supplementing or enhancing the communication performance of mobile communication systems through the construction of NTN. For example, 3GPP has started to carry out satellite-ground integration research and related solutions since Release 14 (R14).

[0153] 2) Terminal equipment is a device that provides voice and / or data connectivity to users and can access network devices through a wireless interface. Terminal equipment can also be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc. In this application, terminal equipment can be fixed or mobile, and this application does not limit this.

[0154] For example, the terminal device can be a handheld device with wireless connection function, various vehicle-mounted devices, roadside units, Internet of Things terminals, access terminals, terminals in V2X communication, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile devices, user terminals, terminals, wireless communication equipment, user agents or user devices, etc. At present, some examples of terminal devices are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MID), smart point of sale (POS), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved public land mobile networks (PLMNs), wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, and wireless terminals in smart cities. The invention relates to wireless terminals in smart cities, wireless terminals in smart homes, various smart meters (smart water meters, smart electricity meters, smart gas meters), vehicle-mounted electronic control units (ECU), vehicle-mounted computers, vehicle-mounted cruise control systems, telematics boxes (T-BOX), UE units, UE stations, mobile stations, remote stations, remote terminal devices, mobile devices, wireless communication equipment, UE agents, UE devices, etc.

[0155] The terminal device can communicate with the network device directly or through a relay station. The terminal device can communicate with multiple network devices equipped with different communication technologies. For example, the terminal device can communicate with a base station equipped with an LTE network, or with a base station equipped with a 5G network, and can also support dual connection with a base station equipped with an LTE network and a base station equipped with a 5G network.

[0156] 3) Network equipment is an entity with wireless transceiver function on the network side of the communication system. In the embodiment of the present application, the network equipment may include but is not limited to: a base station carried on a satellite (referred to as a satellite base station), a transmission receiving point (transmission receiving point / transmission reception point, TRP) or a distributed unit (distributed unit, DU) carried on a satellite, a satellite ground station in a satellite system (referred to as a ground station), a balloon station, a drone station, etc.

[0157] The embodiments of the present application do not limit the standard of the network device. For example, the network device may be a Node B, an evolved Node B (eNB), a new generation Node B (gNB), or a network device of other standards that continues to evolve based on the above network devices.

[0158] The embodiments of the present application do not limit the type of network equipment. For example, the network equipment may be an access point (AP), a wireless-fidelity (WiFi) AP, a home base station (e.g., home evolved NodeB, or home Node B, HNB), a wireless relay node, a wireless backhaul node, a macro base station, a micro base station, a pico base station, a small station, or a relay station, etc.

[0159] The embodiments of the present application do not limit the specific technology and specific device form used by the network device. The network device may correspond to an eNB in ​​a 4G system and to a gNB in ​​a 5G system.

[0160] In addition, in a network structure, the network device may include a centralized unit (CU) node and a distributed unit (DU) node. This structure can separate the protocol layer of the network device, with some of the functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, which is centrally controlled by the CU.

[0161] For example, the functions of the packet data convergence protocol (PDCP) layer and above protocol layers can be set in the CU, and the functions of the protocol layers below the PDCP layer (such as the radio link control (RLC) layer and the medium access control (MAC) layer, etc.) are set in the DU. It should be noted that this division of the protocol layers is only an example, and it can also be divided at other protocol layers. The radio frequency device can be remote and not placed in the DU, or it can be integrated in the DU, or partly remote and partly integrated in the DU, and the embodiments of the present application do not impose any restrictions. In addition, in some embodiments, the control plane (CP) and user plane (UP) of the CU can also be separated and implemented by different entities, namely the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity).

[0162] In this network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU. The DU can directly encapsulate the signaling through the protocol layer and transparently transmit it to the terminal device or CU without parsing it. In this network architecture, the CU is divided into a network device on the radio access network (RAN) side. In addition, the CU can also be divided as a network device on the core network (CN) side, and this application does not limit this.

[0163] 4) Terminal device type: In the present application, the terminal device type is divided according to the mobility of the terminal device. Generally, the terminal device type may include: fixed terminal device type and mobile terminal device type.

[0164] As the name implies, the fixed terminal device type is proposed for terminal devices with fixed locations and limited mobility. For example, a terminal device belonging to the fixed terminal device type can meet any of the following conditions:

[0165] The terminal device is located in a fixed position; the terminal device moves within a set geographical range;

[0166] The terminal device moves across a set number of geographical locations; or

[0167] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0168] The mobile terminal device type is proposed for terminal devices with high mobility and no fixed location. Optionally, the mobile terminal device type can be further subdivided into multiple sub-mobile terminal device types according to information such as the services that the terminal device can realize, the environment in which the terminal device is located, or the geographical location characteristics.

[0169] It should be noted that in a communication system, a terminal device can determine its own type through its own location information and moving speed, or through the user's configuration or the network's configuration. The network device can also identify the type of the terminal device based on the location information, moving speed, etc. of the terminal device. Therefore, from the perspective of the network device, the fixed terminal device type is the type of terminal device that the network device can identify as having a fixed location and limited mobility, and the mobile terminal device type is the type of terminal device that the network device can identify as having a changed device location and high mobility.

[0170] For example, in the NTN scenario, the fixed terminal device type may be a fixed satellite service (FSS) terminal device; the mobile terminal device type may be an earth station in motion (ESIM). The multiple sub-mobile terminal device types included in the mobile terminal device type may include, but are not limited to: aeronautical-ESIM (A-ESIM), maritime-ESIM (M-ESIM) and land-ESIM (L-ESIM).

[0171] 5) Antenna configuration of the terminal device. In high-frequency band communications, there may be multiple types of antennas for terminal devices, such as phased array antennas, reflector antennas, etc. In addition, a terminal device may also be configured with one or more types of antennas, and a terminal device may be configured with one or more of the same antenna type. When a terminal device is configured with multiple types of antennas, the terminal device may be configured with different antennas for transmission and reception respectively, or it may be configured with the same antenna for transmission and reception, that is, whether the terminal device's transmission and reception share the same antenna (or whether the terminal device's uplink antenna and downlink antenna share the same antenna).

[0172] It should also be noted that different types of antennas, or different antennas of the same type, may have different operating characteristics, operating parameters, RF capabilities and other properties, which will further affect the beam adjustment capability of the terminal device. The beam adjustment capability of the terminal device refers to the ability of the terminal device to adjust the beamforming direction, such as the ability of the terminal device to adjust the gain and direction of the beam.

[0173] In summary, the antenna configuration of the terminal device can be understood as: the antenna type of the uplink and / or downlink antenna of the terminal device; or the beam adjustment capability of the terminal device.

[0174] It should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c can be single or multiple.

[0175] In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0176] It should be noted that in this application, "used for indication" can include being used for direct indication and being used for indirect indication. When describing that a certain information is used to indicate A, it can include that the information directly indicates A or indirectly indicates A, but it does not mean that the information must carry A. Taking the first information used to indicate the first content as an example, the first information can include the first content, and can also include a part of the first content or an identifier or index of the first content, and can also include an algorithm for determining the first content, a calculation parameter, etc. This application does not limit the method of "indication".

[0177] In the present application, "include / comprising / carry A" may be equivalent to "include / comprising / carry A information". A information is used to indicate A.

[0178] In addition, it should be understood that in the description of the embodiments of the present application, words such as "first" and "second" are only used to distinguish the description purpose, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0179] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0180] The communication method provided in the embodiment of the present application can be applied to various NTN scenarios. Since the satellite system is a typical application scenario in the NTN scenario, the present application takes the satellite system in the NTN as an example to illustrate the communication system applicable to the embodiment of the present application.

[0181] In a satellite system, terminal devices on the ground access the network through the air interface. The base station can be deployed on the satellite or on the ground (in this case, the satellite has a relay function). Optionally, part of the functions of the base station can be deployed on the satellite and the other part can be deployed on the ground. The satellite can communicate with the ground station through a wireless link, and then communicate with the base station or core network in the ground network.

[0182] The functions of each network element in the satellite system are described below.

[0183] Terminal equipment: can access the satellite system through the air interface and initiate calls, surf the Internet and other services. For specific descriptions and examples, please refer to the explanation of terms in point 2) above.

[0184] Base station: provides wireless access services for terminal devices, dispatches wireless resources to access terminal devices, and provides reliable wireless transmission protocols and data encryption protocols, etc. For specific descriptions and examples, please refer to the explanation of the terms for network devices in point 3) above.

[0185] Core network: used to implement services such as user access control, mobility management, session management, user security authentication, and billing. The core network consists of multiple functional units, which can be divided into control plane and data plane functional units.

[0186] Exemplarily, the functional units of the control plane may include: session management function (SMF) network element, access and mobility management function (AMF) network element, unified data management (UDM) entity, policy control function (PCF) entity, etc. AMF network element is responsible for user access management, security authentication, and mobility management. SMF network element is responsible for session management.

[0187] The functional unit of the data plane may include a user plane function (UPF) network element. The UPF network element is mainly responsible for managing functions such as transmission of user plane data, traffic statistics, and secure eavesdropping.

[0188] Ground station: used to connect satellites to the ground network and is responsible for forwarding signaling and service data between the satellite and the base station or core network in the ground network. Ground station can also be called gateway, satellite ground station, earth station, etc.

[0189] According to the satellite communication mode, the satellite system can be divided into the Bentpipe mode and the Regenerative mode. Figure 1 Several typical application scenario examples of satellite-ground fusion networks are shown to illustrate.

[0190] In the transparent transmission mode, the satellite has the function of signal frequency conversion and forwarding. Figure 1 As shown in (a), the terminal device and the satellite, and the satellite and the ground station are connected through an air interface (such as a Uu interface). The satellite is equivalent to a repeater, which is used to forward signals between the satellite and the ground station. There is a communication connection between the ground station and the base station in the ground network. The base station and the core network (CN) can communicate through the next generation network (NG) interface (such as the N2 interface, the N3 interface, etc.), and the core network and the data network (DN) communicate through the N6 interface.

[0191] In satellite systems in regenerative mode, such as Figure 1 As shown in (b)-(d) in FIG, a satellite can carry a base station or a DU in a base station. The satellite can analyze and process the signal received from the ground station and send the processed signal to the terminal device to achieve signal regeneration.

[0192] like Figure 1 As shown in (b), the satellite is equipped with a base station, and the satellite can be called a satellite base station. The terminal device and the satellite can establish a communication connection through the air interface, and the satellite can establish a communication connection with the core network through the ground station through the NG interface. Optionally, in another scenario, the satellite can also establish a communication connection with the base station in the ground network through the Xn interface, and the base station in the ground network can establish a communication connection with the core network through the NG interface. The core network and DN communicate through the N6 interface.

[0193] like Figure 1 As shown in (c) in the figure, the satellite carries the DU in the base station, and the ground station can be connected to the CU in the base station deployed in the ground network. The terminal device and the satellite can establish a communication connection through the air interface, and the satellite can establish a communication connection with the CU through the ground station through the F1 interface. The interface between the CU, core network, and DN can refer to Figure 1 (b) in the figure will not be described in detail here.

[0194] Figure 1 The application scenario shown in (d) is similar to Figure 1 Compared with the scenario shown in (b) in FIG, communication between satellites (base stations) is added, that is, the terminal device can access the network through one satellite (base station) or multiple satellite base stations. As shown in the figure, satellites (base stations) can communicate with each other through the Xn interface.

[0195] exist Figure 1 In the various application scenarios shown, the base station (or the CU and DU in the base station) (for example, a satellite equipped with a base station, a base station located in a ground network, or a satellite equipped with a DU and a DU located in a ground network) can use beamforming technology to provide services to terminal devices within its coverage area.

[0196] Below Figure 1 The interfaces between network elements in each application scenario shown are described.

[0197] Air interface: refers to the wireless link between the terminal device and the base station. For example, the air interface can be a Uu interface.

[0198] Xn interface: refers to the interface between base stations, mainly used for signaling interaction such as switching.

[0199] NG interface: refers to the interface between the base station and the core network, which mainly exchanges signaling such as the non-access stratum (NAS) of the core network and user service data. Exemplarily, the NG interface may include the N2 interface, the N3 interface, etc.

[0200] It should be noted that Figure 1 Some of the application scenarios shown show one satellite or one ground station. In actual scenarios, a structure of multiple satellites and / or multiple ground stations may be adopted as needed. Each satellite may provide communication services to one or more terminal devices, each ground station may correspond to one or more satellites, and each satellite may correspond to one or more ground stations, which is not specifically limited in the embodiments of the present application.

[0201] It should be noted that Figure 1The satellite system shown does not constitute a limitation on the communication system to which the embodiments of the present application can be applied. Therefore, the communication method provided in the embodiments of the present application can also be applied to communication systems in various NTN scenarios. In addition, the embodiments of the present application do not limit the mobile communication system format of the ground network in the satellite system. For example, the ground network can be: long term evolution (LTE) communication system, fifth generation (5G) communication system (also known as 5G new radio (NR) system), sixth generation (6G) communication system and future communication system.

[0202] Different countries or regions have different laws and regulations regarding high-frequency communications in NTN scenarios. These laws and regulations may specify the types of network devices and terminal devices, the frequency bands used, the services implemented, and so on. However, network devices in NTN scenarios may provide services to terminal devices in different countries or regions; even the laws and regulations of the same country will continue to change with the passage of time and the development of communications; furthermore, the types, forms, services, and capabilities of terminal devices in NTN scenarios are also richer and more diverse. Therefore, in NTN scenarios, the network device that the terminal device requests to access may not support its access due to the provisions of the current local laws and regulations, resulting in the access of the terminal device being restricted, which ultimately affects the service implementation of the terminal device.

[0203] Based on this, in order to ensure that the terminal device in the NTN scenario can access the network device, the present application provides the following embodiments. The following embodiments or examples can be applied to any NTN scenario, for example Figure 1 Satellite system shown. Based on this, the network devices involved in each embodiment or example are applied to the network devices in NTN, that is, the devices on the network side that provide access services for the terminal devices, such as conventional base stations located in the ground network, satellites carrying base stations or DUs, etc. When the network device is a satellite, the embodiment of the present application does not limit the type of the satellite, which can be a GEO satellite, HEO satellite, MEO satellite, or LEO satellite, etc. In addition, for the convenience of description and understanding, each embodiment is described by taking the first terminal device as an example of any terminal device in the NTN scenario. The following is explained in conjunction with the corresponding flowcharts.

[0204] Embodiment 1: This embodiment of the present application provides a communication method, which is referred to below Figure 2 The flowchart shown illustrates the method.

[0205] S201: The network device sends a first message. A first terminal device located within the coverage of the network device receives the first message from the network device. The first message is used to indicate the type of terminal device that the network device allows to access; the type of terminal device that the network device allows to access includes: fixed terminal device type and / or mobile terminal device type.

[0206] It should be noted that the types of terminal devices allowed to access the network device are usually in compliance with the provisions of the current local laws and regulations of the network device. Optionally, the network device can analyze the current local laws and regulations to determine the types of terminal devices allowed to access the network device; or the core network device configures the types of terminal devices allowed to access the network device to the network device by sending a message; or the user analyzes the current local laws and regulations, determines the types of terminal devices allowed to access the network device, and configures them to the network device. The embodiments of the present application do not limit the manner in which the network device determines the types of terminal devices allowed to access the network device.

[0207] In one embodiment, in S201, the network device may broadcast the first information so that all terminal devices within the coverage of the network device can receive the first information. Based on this, the first terminal device can receive the first information broadcast by the network device. Exemplarily, the network device may carry the first information in a system message (such as a main information block (MIB) or a system information block (SIB)). In this way, the network device can notify the terminal devices within the coverage of the first information, and the terminal devices that have not yet accessed the network device can decide whether to access the network device based on the first information and their own type, thereby avoiding the situation where the network device does not allow access to its own type, resulting in the failure of the access process initiated by the terminal device.

[0208] In the embodiment of the present application, according to the explanation of the mobile terminal device type in the above explanation of the terminology in point 4), in some scenarios, the mobile terminal device type can also be subdivided into multiple sub-mobile terminal device types, that is, the mobile terminal device type can contain multiple sub-mobile terminal device types. For example, the mobile terminal device type is ESIM, and the multiple sub-mobile terminal device types contained in the mobile terminal device type can be: flight ESIM, navigation ESIM, and land ESIM.

[0209] Based on this, in one implementation, when the terminal device type indicated by the first information that the network device allows to access includes a mobile terminal device type, the first information may also be used to indicate at least one sub-mobile terminal device type that the network device allows to access.

[0210] In this way, when the local laws and regulations where the network device is located specifically stipulate the sub-mobile terminal device types supported by the network device, the network device can notify the terminal devices within the coverage area through the first information of at least one sub-mobile terminal device that it allows to access, so that the terminal devices belonging to the mobile terminal device type and the sub-mobile terminal device type to which it belongs is included in at least one sub-mobile terminal device allowed to access by the network device can initiate an access process to the network device. The specific determination process of at least one sub-mobile terminal device allowed to access by the network device can refer to the above-mentioned process of the network device determining the terminal device type allowed to access by the network device, which will not be repeated here.

[0211] In addition, according to the explanation of the fixed terminal device type in the above explanation of the terminology in point 4), different countries or regions may have different judgment conditions for the fixed terminal device type. Therefore, in one embodiment, when the terminal device type allowed to access by the network device indicated by the first information includes the fixed terminal device type, the first information can also be used to indicate the judgment condition that meets the fixed terminal device type. Exemplarily, the fixed terminal device type can be an FSS terminal device.

[0212] In this way, the network device can notify the terminal devices within the coverage area through the first information of the judgment conditions for the types of fixed terminal devices allowed to access, so that terminal devices that belong to the fixed terminal device type and meet the judgment conditions can initiate an access process to the network device.

[0213] Among them, similar to the terminal device type allowed to access by the network device indicated by the first information, the judgment condition indicated by the first information also complies with the provisions of the current local laws and regulations of the network device. The specific determination process refers to the process of the above-mentioned network device determining the terminal device type allowed to access by the network device, which will not be repeated here.

[0214] Optionally, the judgment condition indicated by the first information may include but is not limited to any of the following:

[0215] The terminal equipment is located in a fixed position;

[0216] The terminal device moves within a set geographical range;

[0217] The terminal device moves across a set number of geographical locations; or

[0218] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0219] On the terminal device side, the terminal device can further determine its own type in the current environment more accurately through the judgment condition of the fixed terminal device type indicated by the first information, thereby confirming or correcting the type of the terminal device. For example, in other environments, the terminal device determines that its own terminal device type is a fixed terminal device type based on its own location information or user configuration. However, in the current environment, after the terminal device receives the first information, it determines that the terminal device does not meet the judgment condition indicated by the first information. In this case, the terminal device can correct its own type to a mobile terminal device type. Of course, in some scenarios, the terminal device may not perform the steps of determining or correcting its own type, but directly determine whether its own location information meets the judgment condition, and then decide to initiate an access process or start cell reselection.

[0220] In one implementation, in addition to indicating the type of terminal device that the network device allows to access, the first information may further indicate the services that the network device allows to implement. The services that the network device allows to implement are services that the network device can provide communication services for the terminal device that accesses, or services that the terminal device that accesses the network device can implement.

[0221] Optionally, the services that the network device is allowed to implement may also be stipulated by the current local laws and regulations of the network device, or determined based on the communication characteristics of the network device, the communication system where the network device is located, etc.

[0222] In some cases, the services that the network device allows to be implemented can also be special access permissions set for the network device, or special access permissions set by the network device for terminal device types that do not meet the requirements of the network device. In this case, the priority of the services that the network device allows to be implemented is higher than the priority of the terminal device types that the network device allows to access, that is, regardless of whether the type of the terminal device is included in the terminal device types that the network device allows to access, as long as the service to be implemented by the terminal device (the service requested by the terminal device) is included in the service allowed by the network device, the network device will allow the terminal device to access, and the terminal device can initiate an access process to the network device. Optionally, in this case, the network device can also indicate in the first information: the priority of the service allowed to be implemented by the network device, the priority of the terminal device type allowed to access by the network device; or indicate the relationship between the priority of the service allowed to be implemented by the network device and the priority of the terminal device type allowed to access by the network device. In this way, the terminal device that receives the first information can determine the implementation method of whether to initiate the access process by deciding whether to initiate the access process through the service allowed to be implemented by the network device.

[0223] Based on this, if the type of the terminal device is included in the types of terminal devices that the network device allows access to, the network device allows the terminal device to access; if the type of the terminal device is not included in the types of terminal devices that the network device allows access to, but the service to be implemented by the terminal device is included in the services that the network device allows to implement, the network device also allows the terminal device to access; if the service type of the terminal device is not included in the types of terminal devices that the network device allows access to, and the service to be implemented by the terminal device is not included in the services that the network device allows to implement, the network device does not allow the terminal device to access. For the specific implementation method of the terminal device deciding whether to initiate the access process based on the services that the network device allows to implement, please refer to the relevant description in S202 below.

[0224] Exemplarily, when the service allowed to be implemented by the network device is a special access permission set for the network device, the service allowed to be implemented by the network device may be some special services related to the safety of life and property, such as emergency-call (e-call) services.

[0225] S202: The first terminal device initiates an access process to the network device or starts a cell reselection process based on the first information.

[0226] In S202, the first terminal device may determine whether to initiate an access process or start a cell reselection process based on its own type and the first information. The specific steps are as follows:

[0227] When the terminal device type indicated by the first information as allowed to access by the network device includes the type to which the first terminal device belongs, the first terminal device initiates an access process to the network device;

[0228] When the terminal device types allowed to access by the network device indicated by the first information do not include the type to which the first terminal device belongs, the first terminal device initiates a cell reselection process.

[0229] In one implementation, in a scenario where the terminal device type allowed to access by the network device indicated by the first information includes a mobile terminal device type, and the first information is also used to indicate at least one sub-mobile terminal device type allowed to access by the network device, if the first terminal device type is a mobile terminal device type, then the first terminal device needs to further determine whether to initiate an access process or start a cell reselection process based on its own sub-mobile terminal device type, and the specific steps are as follows:

[0230] In the case that the type to which the first terminal device belongs is a mobile terminal device type, when the terminal device type indicated by the first information that the network device allows to access includes the mobile terminal device type, and at least one sub-mobile terminal device type indicated by the first information that the network device allows to access includes the sub-mobile terminal device type to which the first terminal device belongs, the first terminal device initiates an access process to the network device;

[0231] In the case that the type of the first terminal device is a mobile terminal device type, when the terminal device types allowed to access by the network device indicated by the first information include mobile terminal device types, and at least one sub-mobile terminal device type allowed to access by the network device indicated by the first information does not include the sub-mobile terminal device type to which the first terminal device belongs, the first terminal device initiates the cell reselection process.

[0232] In one implementation, the terminal device type allowed to access by the network device indicated by the first information includes a fixed terminal device type, and the first information is further used to indicate a scenario that meets the judgment condition of the fixed terminal device type. If the first terminal device belongs to a fixed terminal device type, then the first terminal device needs to further determine whether to initiate an access process or start a cell reselection process through the judgment condition. The specific steps are as follows:

[0233] In the case where the type of the first terminal device is a fixed terminal device type, when the terminal device types allowed to access by the network device indicated by the first information include fixed terminal device types, and the first terminal device meets the judgment condition indicated by the first information, the first terminal device initiates an access process to the network device;

[0234] In the case that the first terminal device type is a fixed terminal device type, when the terminal device types allowed to access by the network device indicated by the first information include fixed terminal device types, and the first terminal device does not meet the judgment conditions indicated by the first information, the first terminal device initiates the cell reselection process.

[0235] For the determination condition of the type of fixed terminal device, reference may be made to the relevant description in S201. In the above steps, the first terminal device may determine whether it meets the determination condition through its own location information.

[0236] In one implementation, when the first information also indicates the services that the network device allows to be implemented, the first terminal device can determine to initiate an access process or start a cell reselection process based on its own services to be implemented and the services that the network device allows to be implemented. The specific steps are as follows:

[0237] When the service allowed to be implemented by the network device indicated by the first information includes the service to be implemented by the first terminal device, the first terminal device initiates an access process to the network device;

[0238] When the services that the network device indicated by the first information allows to be implemented do not include the services to be implemented by the first terminal device, the first terminal device initiates a cell reselection process.

[0239] Optionally, the first terminal device may, but is not limited to, use the following two specific implementation methods to determine the subsequent execution process based on its own business to be implemented.

[0240] Implementation method 1: The services that the network device indicated by the first information allows to be implemented can be used by the terminal device that meets the terminal device type allowed to access by the network device to further determine to initiate an access process or start a cell reselection process, as follows:

[0241] When the type of terminal devices allowed to access by the network device indicated by the first information includes the type to which the first terminal device belongs, and the service allowed to be implemented by the network device indicated by the first information includes the service to be implemented by the first terminal device, the first terminal device initiates an access process to the network device;

[0242] When the terminal device type allowed to access by the network device indicated by the first information includes the type to which the first terminal device belongs, but the service allowed to be implemented by the network device indicated by the first information does not include the service to be implemented by the first terminal device, the first terminal device initiates a cell reselection process.

[0243] Implementation method 2: The services that the network device indicated by the first information allows to be implemented are special access permissions set for the network device. The priority of the services that the network device allows to be implemented is higher than the priority of the terminal device types that the network device allows to access. That is, regardless of whether the type of the terminal device is included in the terminal device types that the network device allows to access, as long as the service to be implemented by the terminal device (the service that the terminal device requests to implement) is included in the services that the network device allows to be implemented, then the network device will allow the terminal device to access, and the terminal device can initiate an access process to the network device. The specific steps are as follows:

[0244] When the service allowed to be implemented by the network device indicated by the first information includes the service to be implemented by the first terminal device, the first terminal device no longer determines whether its own type is included in the terminal device types allowed to access the network device, but directly initiates an access process to the network device; when the service allowed to be implemented by the network device indicated by the first information does not include the service to be implemented by the first terminal device, the first terminal device continues to determine whether to initiate an access process to the network device or start a cell reselection process based on whether its own type is included in the terminal device types allowed to access the network device;

[0245] Alternatively, when the type of terminal devices allowed to access by the network device indicated by the first information includes the type to which the first terminal device belongs, the first terminal device no longer determines whether the service to be implemented by itself is included in the services allowed by the network device, but directly initiates an access process to the network device; when the type of terminal devices allowed to access by the network device indicated by the first information does not include the type to which the first terminal device belongs, the first terminal device continues to determine whether to initiate an access process to the network device or start a cell reselection process based on whether the service to be implemented by itself is included in the services allowed by the network device.

[0246] In an embodiment of the present application, the communication system may stipulate that the terminal device adopts one of the implementation methods to determine whether to initiate an access process or start a cell reselection process through the services to be implemented by itself and the services allowed to be implemented by the network device. Optionally, the network device may also instruct the terminal device which implementation method to adopt by sending information. For example, when the first information also indicates that the priority of the service allowed to be implemented by the network device is higher than the priority of the type of terminal device allowed to access by the network device, the terminal device adopts the second implementation method; when the first information also indicates that the priority of the service allowed to be implemented by the network device is lower than the priority of the type of terminal device allowed to access by the network device, the terminal device adopts the first implementation method.

[0247] Through step S202, after receiving the first information, the first terminal device can determine whether it is a terminal device allowed to access by the network device based on the first information and its own situation, thereby deciding whether to access the network device, thereby avoiding the situation where the first terminal device initiates an access process to the network device in a scenario where the network device does not allow access, which ultimately leads to the failure of the access process initiated by the first terminal device. In this way, the first terminal device can select a suitable network device to access through the first information sent by the network device, ultimately ensuring that the terminal device in the NTN scenario can access the network device, thereby improving the access success rate and saving the power consumption of the terminal device.

[0248] After the first terminal device initiates an access process to the network device in S202, the first terminal device can first establish uplink synchronization with the network device through a random access process; then initiate an RRC connection establishment process to establish an RRC connection; finally, the first terminal device can initiate a registration process to register with the communication system where the network device is located.

[0249] Optionally, in an embodiment of the present application, the first terminal device may also report its own type or its own antenna configuration to the network device after initiating the access process, so that the network device can verify the first terminal device according to the type of the first terminal device reported by the first terminal device, and determine whether it is a terminal device allowed to access by the network device; or the network device can determine whether it can provide access services for the first terminal device according to the antenna configuration reported by the first terminal device, and determine some working parameters, etc., so as to better serve the first terminal device. Figure 2 As shown, the process can be implemented by the following S203-S204:

[0250] S203: The first terminal device sends an RRC connection establishment request message (e.g., an RRCSetRequest message) to the network device. The network device receives the RRC connection establishment request message from the first terminal device. The RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the first terminal device, and the third information is used to indicate the antenna configuration of the first terminal device. The type of the first terminal device is: a fixed terminal device type or a mobile terminal device type.

[0251] S204: The network device sends an RRC connection establishment completion message (e.g., an RRCSetComplete message) to the first terminal device, and the first terminal device receives the RRC connection establishment completion message from the network device; or the network device sends an RRC connection rejection message (e.g., an RRCReject message) to the first terminal device, and the first terminal device receives the RRC connection rejection message from the network device.

[0252] In S204, the network device may decide whether to allow the first terminal device to continue access based on the content contained in the received RRC connection establishment request message, thereby sending an RRC connection establishment completion message or an RRC connection rejection message to the first terminal device.

[0253] In one embodiment, the first terminal device sends the second information to the network device through an RRC connection establishment request message, that is, reporting the type to which the first terminal device belongs. In this embodiment, the network device can determine whether to allow the first terminal device to continue access by determining whether the terminal device types allowed to access the network device include the type to which the first terminal device belongs.

[0254] Optionally, the network device may further determine whether to allow the first terminal device to continue accessing when the terminal device type allowed to access by the network device includes the type to which the first terminal device belongs in combination with at least one of the following implementations:

[0255] Implementation method 1: In some scenarios, the communication system does not allow the terminal device to switch types. In this case, the network device can determine whether the first terminal device has switched types based on the access history information of the first terminal device (including the type of the first terminal device each time the first terminal device accesses). When the network device determines that the first terminal device has not switched types, it allows the first terminal device to continue accessing, that is, it continues to execute the RRC establishment process of the first terminal device, and after completion, sends an RRC connection establishment completion message to the first terminal device; when the network device determines that the first terminal device has switched types, it does not allow the first terminal device to continue accessing, and the network device can send an RRC connection rejection message to the first terminal device.

[0256] Implementation method 2: In some scenarios, the communication system allows the terminal device to switch types, but there are certain restrictions on the type switching frequency of the terminal device. Then the network device can determine the type switching frequency of the first terminal device based on the access history information of the first terminal device (including the type of the first terminal device each time the first terminal device accesses, and the time of each access of the first terminal device). When the network device determines that the type switching frequency of the first terminal device is less than the set frequency threshold, the first terminal device is allowed to continue to access; when the network device determines that the type switching frequency of the first terminal device is greater than or equal to the set frequency threshold, the first terminal device is not allowed to continue to access.

[0257] Implementation method three: In some scenarios, the communication system allows terminal devices to switch types, but there are certain restrictions on the duration of a terminal device of a fixed terminal device type that is in the fixed terminal device type. When the second information indicates that the type of the first terminal device is a fixed terminal device type, the network device may determine the duration of the first terminal device being in the fixed terminal device type based on the location information of the first terminal device (for example, the location information of the first terminal device contained in the access history information of the first terminal device). When the network device determines that the duration is greater than or equal to the set duration threshold, the first terminal device is allowed to continue to access; when the network device determines that the duration is less than the set frequency threshold, the first terminal device is not allowed to continue to access.

[0258] Implementation method 4: When the second information indicates that the type of the first terminal device is a fixed terminal device type, the network device may also determine whether the first terminal device meets the judgment condition of the fixed terminal device type according to the location information of the first terminal device. When the network device determines that the first terminal device meets the judgment condition, the first terminal device is allowed to continue access; when the network device determines that the first terminal device does not meet the judgment condition, the first terminal device is not allowed to continue access.

[0259] Implementation method 5: When the second information indicates that the type to which the first terminal device belongs is a mobile terminal device type, and the second information also indicates the sub-mobile terminal device type to which the first terminal device belongs, the network device may also determine whether the at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs. When the network device determines that the at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs, the first terminal device is allowed to continue accessing; when the network device determines that the at least one sub-mobile terminal device type allowed to access by the network device does not include the sub-mobile terminal device type to which the first terminal device belongs, the first terminal device is not allowed to continue accessing.

[0260] In some scenarios, the first terminal device may also report the service to be implemented by the first terminal device through the second information. In this way, the network device may also determine the subsequent execution process through the service to be implemented by the first terminal device. The specific process may refer to S202 in which the first terminal device determines to initiate an access process or start a cell reselection process through its own service to be implemented. The specific steps are as follows:

[0261] When the service allowed to be implemented by the network device includes the service to be implemented by the first terminal device indicated by the second information, the network device allows the first terminal device to continue accessing, that is, continues to execute the RRC establishment process of the first terminal device, and sends an RRC connection establishment completion message to the first terminal device after completion;

[0262] When the services allowed to be implemented by the network device do not include the services to be implemented by the first terminal device indicated by the second information, the network device does not allow the first terminal device to continue accessing, and the network device may send an RRC connection rejection message to the first terminal device.

[0263] Optionally, the network device may also determine the subsequent execution process through the service to be implemented by the first terminal device through, but not limited to, the following two implementation methods:

[0264] Implementation method 1: The services that the network device allows to be implemented can be used by the network device to further judge the terminal device that meets the terminal device type allowed to access the network device, and determine whether to allow the terminal device to continue to access, as follows:

[0265] When the type of terminal devices allowed to access by the network device includes the type to which the first terminal device belongs, and the service allowed to be implemented by the network device includes the service to be implemented by the first terminal device indicated by the second information, the network device allows the first terminal device to continue to access;

[0266] When the terminal device types allowed to access by the network device include the type to which the first terminal device belongs, but the services allowed to be implemented by the network device do not include the services to be implemented by the first terminal device indicated by the second information, the network device does not allow the first terminal device to continue to access.

[0267] Implementation method 2: The services that the network device allows to be implemented are special access permissions set for the network device. The priority of the services that the network device allows to be implemented is higher than the priority of the terminal device types that the network device allows to access. That is, regardless of whether the type of the terminal device is included in the terminal device types that the network device allows to access, as long as the service to be implemented by the terminal device (the service that the terminal device requests to implement) is included in the services that the network device allows to be implemented, then the network device will allow the terminal device to continue to access. The specific steps are as follows:

[0268] When the services allowed by the network device include the services to be implemented by the first terminal device indicated by the second information, the network device may no longer determine whether the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, but directly allow the first terminal device to continue accessing; when the services allowed by the network device do not include the services to be implemented by the first terminal device indicated by the second information, the network device may continue to determine whether the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, thereby determining whether to allow the first terminal device to continue accessing. When the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, the network device allows the first terminal device to continue accessing; when the types of terminal devices allowed to access by the network device do not include the type to which the first terminal device belongs, the network device does not allow the first terminal device to continue accessing.

[0269] Alternatively, when the types of terminal devices allowed to access by the network device include the type to which the first terminal device belongs, the network device no longer determines whether the services allowed to be implemented by the network device include the services to be implemented by the first terminal device indicated by the second information, but directly allows the first terminal device to continue accessing; when the types of terminal devices allowed to access by the network device do not include the type to which the first terminal device belongs, the network device may continue to determine whether the services allowed to be implemented by the network device include the services to be implemented by the first terminal device indicated by the second information, thereby determining whether to allow the first terminal device to continue accessing. When the services allowed to be implemented by the network device include the services to be implemented by the first terminal device, the network device allows the first terminal device to continue accessing; when the services allowed to be implemented by the network device do not include the services to be implemented by the first terminal device, the network device does not allow the first terminal device to continue accessing.

[0270] It should be noted that the network device can store the priorities of the services that the network device allows to be implemented and the priorities of the types of terminal devices that the network device allows to access; or store the relationship between the priorities of the services that the network device allows to be implemented and the priorities of the types of terminal devices that the network device allows to access. In this way, the network device can internally configure and decide which of the above implementation methods to use to determine whether to allow the first terminal device to continue to access according to the service to be implemented by the first terminal device.

[0271] It should also be noted that in order to simplify the access process of terminal devices in the communication system, under normal circumstances, when the first information indicates a service allowed by the network device, the second information reported by the first terminal device may not indicate the service to be implemented by the first terminal device; and when the first information does not indicate a service allowed by the network device, the second information reported by the first terminal device may indicate the service to be implemented by the first terminal device.

[0272] In one implementation, the first terminal device sends third information to the network device through an RRC connection establishment request message, that is, reports the antenna configuration of the first terminal device. In this implementation, the network device can also decide whether to allow the first terminal device to continue access based on the antenna configuration.

[0273] Optionally, the antenna configuration of the first terminal device may include at least one of the following: the antenna type of the uplink and / or downlink antenna of the first terminal device; or the beam adjustment capability of the first terminal device.

[0274] Exemplarily, when a network device (such as a LEO satellite, etc.) does not support access by terminal devices with reflector antennas, when the antenna type of the first terminal device indicated by the third information is a reflector antenna, the network device may not allow the first terminal device to continue access; when the antenna type of the first terminal device indicated by the third information is a phased array antenna, the network device may allow the first terminal device to continue access.

[0275] In addition, in this embodiment, when the network device allows the first terminal device to continue to access based on the antenna configuration of the first terminal device, the network device can further determine some working parameters and other information based on the antenna configuration of the first terminal device, so as to better serve the first terminal device.

[0276] Based on this, the network device can determine the beam information of the first terminal device and / or the service information (such as service type, QoS of the service, etc.) that can be provided to the first terminal device according to the antenna configuration of the first terminal device indicated by the third information. Among them, the beam information of the first terminal device determined by the network device can be a beam scheduling method set by the network device for data transmission of the first terminal device.

[0277] For example, when the beam adjustment capability of the first terminal device is weak, the network device may use the first beam to transmit the data of the first terminal device; when the beam adjustment capability of the first terminal device is strong, the network device may use the second beam to transmit the data of the first terminal device. The coverage range / lobe width / beam width of the first beam is greater than the coverage range / lobe width / beam width of the second beam, that is, the first beam can be recorded as a wide beam, and the second beam can be recorded as a narrow beam.

[0278] For another example, when the beam adjustment capability of the first terminal device is weak, or the antenna type of the first terminal device is a reflector antenna, the network device may determine that the service that can be provided to the first terminal device is a broadcast service.

[0279] It should also be noted that when the network device determines some working parameters such as the service information that can be provided to the first terminal device, the network device can also notify the first terminal device of these working parameters. For example, the network device can send these working parameters to the first terminal device through an RRC message (such as an RRC connection establishment completion message). For another example, the network device can send these working parameters to the core network device, and the core network will then send these working parameters to the first terminal device through a non-access stratum (NAS) message.

[0280] In addition, in order to support the terminal device to freely select the network device to be connected according to its own configuration (such as antenna configuration), the embodiment of the present application also provides the following two implementation methods:

[0281] In one embodiment, see Figure 2 As shown, the network device can also broadcast fourth information within its coverage area through S200. The fourth information is used to indicate the type of orbit (e.g., GEO, HEO, MEO, or LEO) or operating position information (e.g., orbit height) of the network device. Based on this, the first terminal device can decide to initiate an access process to the network device or start a cell reselection process in S202 based on the received first information and the fourth information.

[0282] For example, when the beam adjustment capability of the first terminal device is weak, the first terminal device may give priority to satellites with higher orbital altitudes, because these satellites have low beamforming capability requirements for the connected terminal devices. That is, when the orbital type of the network device indicated by the fourth information is GEO or HEO, the first terminal device may initiate an access process to the network device according to the first information; and when the orbital type of the network device indicated by the fourth information is LEO, the first terminal device initiates a cell reselection process and selects other network devices with orbital types of GEO or HEO for access.

[0283] For another example, when the beam adjustment capability of the first terminal device is strong, the first terminal device may give priority to satellites with orbital altitude angles, because these satellites have high requirements for the beamforming capability of the terminal device to be connected. That is, when the orbit of the network device indicated by the fourth information is LEO, the first terminal device may initiate an access process to the network device according to the first information; and when the orbit type of the network device indicated by the ground information is GEO or HEO, the first terminal device initiates a cell reselection process and selects other network devices with an orbit type of LEO for access.

[0284] In another implementation, the network device may send measurement configuration information to a terminal device (referred to as a second terminal device here for distinction) that has access to the network device. The measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0285] In this way, the second terminal device can select a target frequency corresponding to the target orbit type or target operating position information from the at least one frequency to be measured according to its own antenna configuration. For example, when the beam adjustment capability of the first terminal device is weak, the first terminal device can select a target frequency corresponding to the orbit type of GEO or HEO. For another example, when the beam adjustment capability of the first terminal device is strong, the first terminal device can select a target frequency corresponding to the orbit type of LEO.

[0286] In one implementation, after determining the target frequency point, the second terminal device can only perform cell measurement on the neighboring cells at the target frequency point when performing cell measurement, thereby streamlining the cell measurement objects and saving power consumption. In another implementation, after determining the target frequency point, the second terminal device can select the neighboring cell at the target frequency point as the target cell for cell switching or cell reselection.

[0287] Through this implementation, the network device can indicate the operating track type or operating position information corresponding to each frequency point to be measured during the measurement configuration of the terminal device, so that the terminal device can choose to access the neighboring cell on a specific frequency point during the cell switching or cell reselection process, thereby accessing the network device with the operating track type or operating position information that matches its own antenna configuration, ultimately ensuring the communication quality of the terminal device.

[0288] In summary, an embodiment of the present application provides a communication method. In this method, a network device can send a first information indicating the type of terminal device that the network device allows to access. In this way, after receiving the first information, a terminal device within its coverage range can determine whether it is a terminal device that the network device allows to access based on the first information and its own situation, thereby deciding whether to access the network device, thereby avoiding the situation where the terminal device initiates an access process to the network device in a scenario where the network device does not allow access, which ultimately leads to the failure of the access process initiated by the terminal device. Through this method, the terminal device can select a suitable network device to access through the first information sent by the network device, ultimately ensuring that the terminal device in the NTN scenario can access the network device, improving the access success rate, and saving the power consumption of the terminal device.

[0289] Embodiment 2: This embodiment of the present application provides a communication method, which is described below. Figure 3 The flowchart shown illustrates the method.

[0290] S301: After the first terminal device establishes uplink synchronization with the network device by initiating a random access process, the first terminal device sends an RRC connection establishment request message to the network device. The network device receives an RRC connection establishment request message (for example, an RRCSetRequest message) from the first terminal device. The RRC connection establishment request message includes at least one of the following: first information or second information, the first information is used to indicate the type of the first terminal device, and the second information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: a fixed terminal device type or a mobile terminal device type.

[0291] S302: The network device sends an RRC connection establishment completion message (e.g., an RRCSetComplete message) to the first terminal device, and the first terminal device receives the RRC connection establishment completion message from the network device; or the network device sends an RRC connection rejection message to the first terminal device, and the first terminal device receives the RRC connection rejection message (e.g., an RRCReject message) from the network device.

[0292] In S204, the network device may decide whether to allow the first terminal device to continue access based on the content contained in the received RRC connection establishment request message, thereby sending an RRC connection establishment completion message or an RRC connection rejection message to the first terminal device.

[0293] Optionally, the network device may verify the first terminal device according to the type of the first terminal device reported by the first terminal device, and determine whether it is a terminal device that the network device allows access to. Optionally, the network device may determine whether it can provide access services to the first terminal device according to the antenna configuration reported by the first terminal device, and when it can provide access services to the first terminal device, it may also determine some working parameters, etc., so as to better serve the first terminal device. The above specific process can refer to the description of S203-S204 in Example 1, which will not be repeated here.

[0294] In addition, in order to support the terminal device to freely select the network device to be connected according to its own configuration (such as antenna configuration), the embodiment of the present application also provides the following two implementation methods:

[0295] The first implementation method: the network device broadcasts the third information within the coverage area. The third information is used to indicate the type of orbit (for example, GEO, HEO, MEO, or LEO) or the operating position information (for example, the altitude of the orbit) of the network device. Based on this, before executing S301, the first terminal device can decide to initiate an access process to the network device based on the received first information. For the specific process and description, please refer to the relevant description of S200 in Example 1, which will not be repeated here.

[0296] The second implementation method: After the first terminal device accesses the network device (for example, after the network device sends an RRC connection establishment completion message to the first terminal device), the network device can send measurement configuration information to the terminal device that has accessed the network device. The measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or an operating position information. In this way, the first terminal device can select a target frequency point corresponding to the target operating track type or the target operating position information from the at least one frequency point to be measured according to its own antenna configuration. In one implementation, when the first terminal device performs cell measurement, it can only perform cell measurement on the neighboring cells on the target frequency point, thereby streamlining the cell measurement objects and saving power consumption. In another implementation, the first terminal device can select a neighboring cell on the target frequency point as the target cell for cell switching or cell reselection.

[0297] Through this implementation, the network device can indicate the operating track type or operating position information corresponding to each frequency point to be measured during the measurement configuration of the terminal device, so that the terminal device can choose to access the neighboring cell on a specific frequency point during the cell switching or cell reselection process, thereby accessing the network device with the operating track type or operating position information that matches its own antenna configuration, ultimately ensuring the communication quality of the terminal device.

[0298] In summary, an embodiment of the present application provides a communication method. In this method, after randomly accessing a network device, a terminal device can report its own type or its own antenna configuration to the network device through an RRC connection establishment process, so that the network device can decide whether to allow the terminal device to continue access based on this information, thereby avoiding the situation where the network device does not allow access or cannot provide services, and continuing to execute the RRC connection establishment process ultimately leads to the failure of the RRC connection of the terminal device. Through this method, the terminal device can access a suitable network device (i.e., the network device is allowed to access or can provide services for it) by reporting its own capability information to the network device, and finally ensure that the terminal device in the NTN scenario can access the network device, improve the access success rate, and save the power consumption of the terminal device.

[0299] Embodiment 3: This embodiment of the present application provides a communication method, see below Figure 4 The flowchart shown illustrates the method.

[0300] S401: A network device sends a first message. A first terminal device located within the coverage of the network device receives the first message from the network device. The first message is used to indicate the type of orbit (e.g., GEO, HEO, MEO, or LEO) or the operating position information (e.g., orbit height) of the network device.

[0301] Optionally, the network device may broadcast and send the first information. Exemplarily, the network device may carry the first information in the MIB or SIB.

[0302] S402: The first terminal device accesses the network device according to the first information.

[0303] For example, when the beam adjustment capability of the first terminal device is weak, the first terminal device may give priority to satellites with higher orbital altitudes, because these satellites have low beamforming capability requirements for the connected terminal devices. That is, when the orbit type of the network device indicated by the first information is GEO or HEO, the first terminal device may initiate an access process to the network device according to the first information.

[0304] For another example, when the beam adjustment capability of the first terminal device is strong, the first terminal device may give priority to satellites with orbital altitude angles, because these satellites have high beamforming capability requirements for the terminal device to be connected. That is, when the orbit of the network device indicated by the first information is LEO, the first terminal device may initiate an access process to the network device according to the first information.

[0305] Through the method provided in the embodiment of the present application, the network device can send the first information indicating its own running track type or running location information, so that the terminal device within its coverage can know the running track type or running location information of the network device, and then can freely choose whether to access the network device according to the terminal device's own configuration. In this way, the terminal device in the NTN scenario can access the appropriate network device that meets its own configuration, improve the access success rate, and ultimately ensure the communication quality of the terminal device and save the power consumption of the terminal device.

[0306] Embodiment 4: This embodiment of the present application provides a communication method, which is described below. Figure 5 The method is described with reference to the flowchart shown in FIG.

[0307] S501: After a first terminal device accesses a network device, the network device sends measurement configuration information to the first terminal device. The first terminal device receives the measurement configuration information from the network device. The measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0308] S502: The first terminal device selects a target frequency point corresponding to the target operating track type or target operating position information from at least one frequency point to be measured according to the antenna configuration of the first terminal device.

[0309] For example, when the beam adjustment capability of the first terminal device is weak, the first terminal device may select a target frequency corresponding to the orbit type of GEO or HEO.

[0310] For another example, when the beam adjustment capability of the first terminal device is relatively strong, the first terminal device may select a target frequency corresponding to the LEO orbit type.

[0311] S503: The first terminal device performs cell measurement on a neighboring cell at the target frequency; or selects a neighboring cell at the target frequency as a target cell for cell switching or cell reselection.

[0312] Through the method provided in the embodiment of the present application, the network device can indicate the operating track type or operating position information corresponding to each frequency point to be measured during the measurement configuration of the terminal device, so that the terminal device can choose to access the neighboring cell on a specific frequency point during the cell switching or cell reselection process, thereby accessing the network device with the operating track type or operating position information that matches its own antenna configuration, ultimately ensuring the communication quality of the terminal device.

[0313] It should be noted that, for ease of explanation, the above embodiments are written from different design perspectives. Therefore, the methods provided in the above embodiments can be implemented separately, or the methods provided in multiple embodiments can be implemented in combination with each other. For example, in some scenarios, the communication device in the communication system executes the method provided in S201-S202 in Example 1; in some scenarios, the communication device in the communication system can execute the method provided in Example 2; in some scenarios, the communication device in the communication system can execute the method provided in S201-S204 in Example 1; in some scenarios, the communication device in the communication system can execute the method provided in Examples 3 and 4.

[0314] It should also be noted that each step involved in the above embodiments or examples can be performed by a corresponding device, or by a module, chip, processor or chip system in the device, and the embodiments of the present application do not limit them. The above embodiments are only described by taking the execution by the corresponding device as an example. In addition, the specific implementation methods or examples in the above embodiments do not limit the solutions provided in the embodiments of the present application.

[0315] It should be noted that in the above embodiments, some steps can be selected for implementation, and the order of the steps in the diagram can be adjusted for implementation, and this application does not limit this. It should be understood that executing some steps in the diagram, adjusting the order of the steps, or combining them for specific implementation all fall within the scope of protection of this application.

[0316] It is understandable that, in order to implement the functions in the above embodiments, the various devices involved in the above embodiments include hardware structures and / or software modules corresponding to the execution of the various functions. It should be easily appreciated by those skilled in the art that, in combination with the units and method steps of the various examples described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0317] It can be understood that the above-mentioned network architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new services, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0318] It should be noted that the "steps" in the embodiments of the present application are only for illustration, and are a method of expression used to better understand the embodiments, and do not constitute a substantial limitation on the execution of the scheme of the present application. For example, the "steps" can also be understood as "features". In addition, the steps do not constitute any limitation on the execution order of the scheme of the present application. Any changes in the order of steps, step merging, or step splitting made on this basis that do not affect the implementation of the overall scheme, and the resulting new technical solutions are also within the scope of the disclosure of the present application.

[0319] Based on the same technical concept, the present application also provides a communication device, which can be applied to NTN scenarios, such as Figure 1 The communication device is used to implement the method provided in the above embodiment, and the communication device can be applied to the terminal device or network device involved in the above embodiment. Figure 6 As shown, the communication device 600 includes a communication unit 601 and a processing unit 602 .

[0320] The communication unit 601 is used to receive and send data, and supports the communication device 600 to communicate with other devices.

[0321] The processing unit 602 is used to control and manage the actions of the communication device 600 and execute the steps performed by the network device or the terminal device in the communication method provided in the above embodiments.

[0322] Optionally, the communication device 600 further includes a storage unit for storing program code and / or data of the communication device 600 .

[0323] The communication unit 601 may be referred to as an input / output unit, a transceiver unit, etc., and the communication unit 601 may be a transceiver or a communication interface; the processing unit 602 may be a processor. When the communication device 600 is a module (e.g., a chip) in a communication device, the communication unit 601 may be an input / output interface, an input / output circuit, or an input / output pin, etc., and may also be referred to as an interface, a communication interface, or an interface circuit, etc.; the processing unit 602 may be a processor, a processing circuit, or a logic circuit, etc.

[0324] In one implementation, the communication device 600 may be applied to Figure 2 The network device in the embodiment 1 shown is a network device used in a non-terrestrial network NTN. The processing unit 602 is used to:

[0325] The first information is sent through the communication unit 601; wherein the first information is used to indicate the types of terminal devices that the network device allows to access; the types of terminal devices that the network device allows to access include: fixed terminal device types and / or mobile terminal device types.

[0326] Optionally, the processing unit 602, when sending the first information through the communication unit 601, is configured to:

[0327] The first information is broadcasted through the communication unit 601.

[0328] Optionally, the mobile terminal device type includes multiple sub-mobile terminal device types;

[0329] When the terminal device type allowed to access by the network device includes the mobile terminal device type, the first information is further used to indicate at least one sub-mobile terminal device type allowed to access by the network device.

[0330] Optionally, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0331] Optionally, when the terminal device types allowed to access by the network device include the fixed terminal device type, the first information is also used to indicate a judgment condition that meets the fixed terminal device type.

[0332] Optionally, the judgment condition includes any of the following:

[0333] The terminal equipment is located in a fixed position;

[0334] The terminal device moves within a set geographical range;

[0335] The terminal device moves across a set number of geographical locations; or

[0336] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0337] Optionally, the fixed terminal device type is fixed satellite service FSS terminal device.

[0338] Optionally, the first information is also used to indicate the services that the network device is allowed to implement.

[0339] Optionally, the processing unit 602 is further configured to:

[0340] Receiving a radio resource control RRC connection establishment request message from a first terminal device through the communication unit 601; wherein the RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the first terminal device, and the third information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: the fixed terminal device type or the mobile terminal device type;

[0341] An RRC connection establishment completion message is sent to the first terminal device through the communication unit 601.

[0342] Optionally, when the RRC connection establishment request message includes the third information, the processor unit 602 is further configured to:

[0343] Based on the third information, beam information of the first terminal device and / or service information that can provide services to the first terminal device are determined.

[0344] Optionally, the antenna configuration of the first terminal device includes at least one of the following:

[0345] Antenna type of the uplink and / or downlink antenna of the first terminal device; or

[0346] The beam adjustment capability of the first terminal device.

[0347] Optionally, the processor unit 602 is further configured to:

[0348] Receiving a radio resource control RRC connection establishment request message from a first terminal device through the communication unit 601; wherein the RRC connection establishment request message includes second information; the second information is used to indicate the type of the first terminal device, and the type of the first terminal device is: the fixed terminal device type or the mobile terminal device type;

[0349] Before sending the RRC connection establishment completion message to the first terminal device through the communication unit 601, the following steps are performed:

[0350] Determining that the type switching frequency of the first terminal device is less than a set frequency threshold; or

[0351] When the type of the first terminal device is the fixed terminal device type, determining, based on the location information of the first terminal device, a duration for which the first terminal device is in the fixed terminal device type, and determining that the duration is greater than a set duration threshold; or determining, based on the location information of the first terminal device, that the first terminal device meets the judgment condition for the fixed terminal device type; or

[0352] When the type to which the first terminal device belongs is the mobile terminal device type, and the second information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs, it is determined that at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs; wherein the mobile terminal device type includes multiple sub-mobile terminal device types.

[0353] Optionally, the second information is also used to indicate the service to be implemented by the first terminal device.

[0354] Optionally, the processor unit 602 is further configured to:

[0355] The fourth information is broadcasted through the communication unit 601; the fourth information is used to indicate the running track type or running position information of the network device.

[0356] Optionally, the processor unit 602 is further configured to:

[0357] The communication unit 601 sends measurement configuration information to a second terminal device that has access to the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0358] Optionally, the network device is a geosynchronous orbit GEO satellite, a highly elliptical orbit HEO satellite, a medium earth orbit MEO satellite, or a low earth orbit LEO satellite.

[0359] In one implementation, the communication device 600 may be applied to Figure 2 The first terminal device in the embodiment 1 shown. The processing unit 602 is used to:

[0360] Receive first information from a network device through the communication unit 601; wherein the first information is used to indicate the type of terminal device that the network device allows to access; the type of terminal device that the network device allows to access includes: a fixed terminal device type and / or a mobile terminal device type;

[0361] According to the first information, an access process is initiated to the network device, or a cell reselection process is started.

[0362] Optionally, when the processing unit 602 receives the first information from the network device through the communication unit 601, it is configured to:

[0363] The first information broadcast by the network device is received through the communication unit 601.

[0364] Optionally, the processing unit 602, when initiating an access process to the network device or starting a cell reselection process according to the first information, is configured to:

[0365] When the type of terminal devices allowed to access by the network device includes the type to which the first terminal device belongs, initiating an access process to the network device; or

[0366] When the terminal device types allowed to access by the network device do not include the type to which the first terminal device belongs, the cell reselection process is initiated.

[0367] Optionally, the mobile terminal device type includes multiple sub-mobile terminal device types;

[0368] When the terminal device type allowed to access by the network device includes the mobile terminal device type, the first information is also used to indicate at least one sub-mobile terminal device type allowed to access by the network device;

[0369] The processing unit 602 is used to:

[0370] In the case that the type to which the first terminal device belongs is the mobile terminal device type, when the terminal device types allowed to access by the network device include the mobile terminal device type, and at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs, initiating an access process to the network device;

[0371] The processing unit 602 is further configured to:

[0372] In the case that the type to which the first terminal device belongs is the mobile terminal device type, when the terminal device types allowed to access by the network device include the mobile terminal device type, and at least one sub-mobile terminal device type allowed to access by the network device does not include the sub-mobile terminal device type to which the first terminal device belongs, the cell reselection process is initiated.

[0373] Optionally, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0374] Optionally, when the terminal device type allowed to access by the network device includes the fixed terminal device type, the first information is also used to indicate a judgment condition that meets the fixed terminal device type;

[0375] The processing unit 602 is used to:

[0376] In the case where the type of the first terminal device is the fixed terminal device type, when the terminal device types allowed to access by the network device include the fixed terminal device type, and the first terminal device meets the judgment condition, initiating an access process to the network device;

[0377] In the case that the type of the first terminal device is the fixed terminal device type, when the terminal device types allowed to access by the network device include the fixed terminal device type, and the first terminal device does not meet the judgment condition, the cell reselection process is initiated.

[0378] Optionally, the judgment condition includes any of the following:

[0379] The terminal equipment is located in a fixed position;

[0380] The terminal device moves within a set geographical range;

[0381] The terminal device moves across a set number of geographical locations; or

[0382] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0383] Optionally, the fixed terminal device type is fixed satellite service FSS terminal device.

[0384] Optionally, the first information is further used to indicate a service that the network device is allowed to implement; the processing unit 602 is used to:

[0385] When the service allowed to be implemented by the network device includes the service to be implemented by the first terminal device, initiating an access process to the network device; or

[0386] When the services allowed to be implemented by the network device do not include the services to be implemented by the first terminal device, the cell reselection process is initiated.

[0387] Optionally, the processing unit 602 is further configured to:

[0388] After initiating an access process to the network device, an RRC connection establishment request message is sent to the network device through the communication unit 601; wherein the RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the first terminal device, and the third information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: the fixed terminal device type or the mobile terminal device type;

[0389] The communication unit 601 receives an RRC connection establishment completion message from the network device, or receives an RRC connection rejection message from the network device.

[0390] Optionally, the antenna configuration of the first terminal device includes at least one of the following:

[0391] Antenna type of the uplink and / or downlink antenna of the first terminal device; or

[0392] The beam adjustment capability of the first terminal device.

[0393] Optionally, the second information is also used to indicate the service to be implemented by the first terminal device.

[0394] Optionally, when initiating an access process to the network device according to the first information, the processing unit 602 is configured to:

[0395] Receiving, through the communication unit 601, fourth information broadcast by the network device; the fourth information is used to indicate the running track type or running position information of the network device;

[0396] An access process is initiated to the network device according to the first information and the fourth information.

[0397] Optionally, the processing unit 602 is further configured to:

[0398] After accessing the network device, receiving measurement configuration information from the network device through the communication unit 601; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information;

[0399] According to the antenna configuration of the first terminal device, a target frequency point corresponding to the target running track type or the target running position information is selected from the at least one frequency point to be measured;

[0400] Performing cell measurement on a neighboring cell at the target frequency; or

[0401] A neighboring cell on the target frequency point is selected as a target cell for cell switching or cell reselection.

[0402] In one implementation, the communication device 600 may be applied to Figure 3 The network device in the second embodiment shown is a network device used in a non-terrestrial network NTN. The processing unit 602 is used to:

[0403] Receiving an RRC connection establishment request message from a first terminal device through the communication unit 601; wherein the RRC connection establishment request message includes at least one of the following: first information or second information, the first information is used to indicate the type of the first terminal device, and the second information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: a fixed terminal device type or a mobile terminal device type;

[0404] An RRC connection establishment completion message is sent to the terminal device through the communication unit 601.

[0405] Optionally, when the RRC connection establishment request message includes the first information, the type of terminal device allowed to access by the network device includes the type to which the first terminal device belongs.

[0406] Optionally, when the RRC connection establishment request message includes the first information, the processing unit 602 is further configured to:

[0407] Determining that the type switching frequency of the first terminal device is less than a set frequency threshold; or

[0408] When the type of the first terminal device is the fixed terminal device type, determining, based on the location information of the terminal device, a duration for which the first terminal device is in the fixed terminal device type, and determining that the duration is greater than a set duration threshold; or determining, based on the location information of the first terminal device, that the first terminal device meets the judgment condition for the fixed terminal device type; or

[0409] When the type to which the first terminal device belongs is the mobile terminal device type, and the first information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs, it is determined that at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs; wherein the mobile terminal device type includes multiple sub-mobile terminal device types.

[0410] Optionally, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0411] Optionally, the judgment condition includes:

[0412] The terminal equipment is located in a fixed position;

[0413] The terminal device moves within a set geographical range;

[0414] The terminal device moves across a set number of geographical locations; or

[0415] The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

[0416] Optionally, the fixed terminal device type is fixed satellite service FSS terminal device.

[0417] Optionally, when the RRC connection establishment request message includes the second information, the processing unit 602 is further configured to:

[0418] Based on the second information, beam scheduling information of the first terminal device and / or service information that can provide services for the first terminal device is determined.

[0419] Optionally, the antenna configuration of the first terminal device includes at least one of the following:

[0420] Antenna type of the uplink and / or downlink antenna of the first terminal device; or

[0421] The beam adjustment capability of the first terminal device.

[0422] Optionally, when the RRC connection establishment request message includes the first information, the first information is also used to indicate the service to be implemented by the first terminal device; the services allowed to be implemented by the network device include the services to be implemented by the first terminal device.

[0423] Optionally, the processing unit 602 is further configured to:

[0424] The third information is broadcasted through the communication unit 601; the third information is used to indicate the running track type or running position information of the network device.

[0425] Optionally, the processing unit 602 is further configured to:

[0426] The communication unit 601 sends measurement configuration information to the first terminal device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0427] Optionally, the network device is a geosynchronous orbit GEO satellite, a highly elliptical orbit HEO satellite, a medium earth orbit MEO satellite, or a low earth orbit LEO satellite.

[0428] In one implementation, the communication device 600 may be applied to Figure 3 The first terminal device in the second embodiment shown. The processing unit 602 is used to:

[0429] Sending an RRC connection establishment request message to a network device through the communication unit 601; wherein the RRC connection establishment request message includes at least one of the following: first information or second information, the first information is used to indicate the type of the first terminal device, and the second information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: a fixed terminal device type or a mobile terminal device type;

[0430] An RRC connection establishment completion message is received from the network device through the communication unit 601 , or an RRC connection rejection message is received from the network device through the communication unit 601 .

[0431] Optionally, the mobile terminal device type includes multiple sub-mobile terminal device types;

[0432] When the RRC connection establishment request message includes the first information, and the type to which the first terminal device belongs is the mobile terminal device type, the first information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs.

[0433] Optionally, the mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

[0434] Optionally, the fixed terminal device type is fixed satellite service FSS terminal device.

[0435] Optionally, the antenna configuration of the first terminal device includes at least one of the following:

[0436] Antenna type of the uplink and / or downlink antenna of the first terminal device; or

[0437] The beam adjustment capability of the first terminal device.

[0438] Optionally, when the RRC connection establishment request message includes the first information, the first information is also used to indicate the service to be implemented by the first terminal device.

[0439] Optionally, the processing unit 602 is further configured to:

[0440] Receiving the third information broadcasted by the network device through the communication unit 601; wherein the third information is used to indicate the running track type or running position information of the network device;

[0441] An access process is initiated to the network device according to the third information.

[0442] Optionally, the processing unit 602 is further configured to:

[0443] After receiving the RRC connection establishment completion message from the network device through the communication unit 601, receiving measurement configuration information from the network device through the communication unit 601; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information;

[0444] According to the antenna configuration of the first terminal device, a target frequency point corresponding to the target running track type or the target running position information is selected from the at least one frequency point to be measured;

[0445] Performing cell measurement on a neighboring cell at the target frequency; or

[0446] A neighboring cell on the target frequency point is selected as a target cell for cell switching or cell reselection.

[0447] In one implementation, the communication device 600 may be applied to Figure 4 The network device in the third embodiment shown is a network device used in a non-terrestrial network NTN. The processing unit 602 is used to:

[0448] The first information is sent through the communication unit 601; the first information is used to indicate the running track type or running position information of the network device.

[0449] The processing unit 602 is used to:

[0450] The first information is broadcasted and sent through the communication unit 601.

[0451] In one implementation, the communication device 600 may be applied to Figure 4 The first terminal device in the third embodiment shown. The processing unit 602 is used to:

[0452] Receiving first information from a network device through the communication unit 601, where the first information is used to indicate the type of running track or running position information of the network device;

[0453] Initiate an access process to the network according to the first information.

[0454] The processing unit 602 is used to:

[0455] The first information broadcast by the network device is received through the communication unit 601.

[0456] In one implementation, the communication device 600 may be applied to Figure 5The network device in the fourth embodiment shown is a network device used in a non-terrestrial network NTN. The processing unit 602 is used to:

[0457] The communication unit 601 sends measurement configuration information to the first terminal device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

[0458] In one implementation, the communication device 600 may be applied to Figure 5 The first terminal device in the fourth embodiment shown. The processing unit 602 is used to:

[0459] Receiving measurement configuration information from the network device through the communication unit 601; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information;

[0460] According to the antenna configuration of the first terminal device, a target frequency point corresponding to the target running track type or the target running position information is selected from the at least one frequency point to be measured;

[0461] Performing cell measurement on a neighboring cell at the target frequency; or

[0462] A neighboring cell on the target frequency point is selected as a target cell for cell switching or cell reselection.

[0463] It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0464] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0465] Based on the above embodiments, the present application also provides a communication device, which is applicable to NTN scenarios, for example, Figure 1 The communication device can implement the method in the above embodiment and has the function of the communication device 600. Figure 7 As shown, the communication device 700 includes: a transceiver 701, a processor 702, and a memory 703. The transceiver 701, the processor 702, and the memory 703 are connected to each other.

[0466] Optionally, the transceiver 701, the processor 702, and the memory 703 are interconnected via a bus 704. The bus 704 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0467] The transceiver 701 is used to receive and send signals to achieve communication with other devices.

[0468] The functions of the processor 702 may refer to the description in the above embodiments and will not be described again here.

[0469] Among them, the processor 702 can be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP, etc. The processor 702 can further include a hardware chip. The above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. When the processor 702 implements the above-mentioned functions, it can be implemented by hardware, and of course, it can also be implemented by hardware executing the corresponding software. The steps of the method disclosed in the above-mentioned embodiments of the present application can be directly reflected as the execution of the processor 702, or as the execution of the combination of hardware and software modules in the processor 702.

[0470] The memory 703 is used to store program instructions, data, etc. Specifically, the program instructions may include program codes, which include computer operation instructions. The memory 703 may include volatile memory, such as random access memory (RAM); it may also include non-volatile memory, such as at least one disk memory, hard disk drive (HDD), or solid state drive (SSD). The memory 703 can also be any other medium that can be used to carry or store program codes in the form of instructions or data structures and can be accessed by a computer, and this application does not limit this. The processor 702 executes the program instructions stored in the memory 703 to implement the above functions, thereby realizing the method provided in the above embodiment.

[0471] Based on the above embodiments, an embodiment of the present application also provides a communication system, which includes a terminal device and a network device, wherein the terminal device is used to implement the steps performed by the terminal device (i.e., the first terminal device) in the method provided in the above embodiments, and the network device is used to implement the steps performed by the network device in the method provided in the above embodiments.

[0472] Based on the above embodiments, the embodiments of the present application further provide a computer program product, which includes a computer program; when the computer program runs on a computer, the computer executes the method provided in the above embodiments.

[0473] Based on the above embodiments, the embodiments of the present application further provide a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a computer, the computer executes the method provided in the above embodiments.

[0474] Optionally, the above-mentioned computer may include, but is not limited to, communication devices such as terminal devices and network devices.

[0475] The storage medium may be any available medium that can be accessed by a computer. For example but not limited to: a computer-readable medium may include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer.

[0476] Based on the above embodiments, the embodiments of the present application further provide a chip, which is used to read a computer program stored in a memory to implement the method provided in the above embodiments. Optionally, the chip may include a processor, which is coupled to the memory and is used to read the computer program stored in the memory to implement the method provided in the above embodiments. Optionally, the chip may also include components such as a memory, a communication interface, and a power supply module. The memory is used to store a computer program; the communication interface is used to receive and send data; and the power supply unit is used to power the processor.

[0477] Based on the above embodiments, the embodiments of the present application provide a chip system, which includes a processor for supporting a computer device to implement the functions involved in the terminal device in the above embodiments. In a possible design, the chip system also includes a memory, which is used to store the necessary programs and data for the computer device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0478] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0479] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0480] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0481] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0482] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: Sending first information; wherein, the first information is used to indicate the types of terminal devices that the network device allows to access; the types of terminal devices that the network device allows to access include: fixed terminal device types and / or mobile terminal device types, and the network device is a network device applied to a non-terrestrial network NTN.

2. The method according to claim 1, characterized in that The sending of the first information includes: The first information is broadcast.

3. The method according to claim 1 or 2, characterized in that The mobile terminal device type includes multiple sub-mobile terminal device types; When the terminal device type allowed to access by the network device includes the mobile terminal device type, the first information is further used to indicate at least one sub-mobile terminal device type allowed to access by the network device.

4. The method according to claim 3, characterized in that The mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

5. The method according to any one of claims 1 to 4, characterized in that: When the terminal device types allowed to access by the network device include the fixed terminal device type, the first information is also used to indicate a judgment condition that meets the fixed terminal device type.

6. The method according to claim 5, characterized in that The judgment condition includes any of the following: The terminal equipment is located in a fixed position; The terminal device moves within a set geographical range; The terminal device moves across a set number of geographical locations; or The terminal device moves to a set number of geographical locations, and the distance between any two of the set number of geographical locations is less than a set distance threshold.

7. The method according to any one of claims 1 to 6, characterized in that: The fixed terminal equipment type is fixed satellite service FSS terminal equipment.

8. The method according to any one of claims 1 to 7, characterized in that: The first information is also used to indicate the services that the network device is allowed to implement.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: Receiving a radio resource control RRC connection establishment request message from a first terminal device; wherein the RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the first terminal device, and the third information is used to indicate the antenna configuration of the first terminal device; the type of the first terminal device is: the fixed terminal device type or the mobile terminal device type; Send an RRC connection establishment completion message to the first terminal device.

10. The method according to claim 9, characterized in that In a case where the RRC connection establishment request message includes the third information, the method further includes: Based on the third information, beam information of the first terminal device and / or service information that can provide services to the first terminal device are determined.

11. The method according to claim 9 or 10, characterized in that The antenna configuration of the first terminal device includes at least one of the following: Antenna type of the uplink and / or downlink antenna of the first terminal device; or The beam adjustment capability of the first terminal device.

12. The method according to any one of claims 1 to 8, characterized in that: The method further comprises: Receiving a radio resource control RRC connection establishment request message from a first terminal device; wherein the RRC connection establishment request message includes second information; the second information is used to indicate the type of the first terminal device, and the type of the first terminal device is: the fixed terminal device type or the mobile terminal device type; Before sending the RRC connection establishment completion message to the first terminal device, the method further includes: Determining that the type switching frequency of the first terminal device is less than a set frequency threshold; or When the type of the first terminal device is the fixed terminal device type, determining, based on the location information of the first terminal device, a duration for which the first terminal device is in the fixed terminal device type, and determining that the duration is greater than a set duration threshold; or determining, based on the location information of the first terminal device, that the first terminal device meets the judgment condition for the fixed terminal device type; or When the type to which the first terminal device belongs is the mobile terminal device type, and the second information is also used to indicate the sub-mobile terminal device type to which the first terminal device belongs, it is determined that at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the first terminal device belongs; wherein the mobile terminal device type includes multiple sub-mobile terminal device types.

13. The method according to any one of claims 10 to 12, characterized in that: The second information is also used to indicate the service to be implemented by the first terminal device.

14. The method according to any one of claims 1 to 13, characterized in that: The method further comprises: Broadcast fourth information; the fourth information is used to indicate the running track type or running position information of the network device.

15. The method according to any one of claims 1 to 14, characterized in that: The method further comprises: Send measurement configuration information to a second terminal device that has access to the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information.

16. The method according to any one of claims 1 to 15, characterized in that: The network device is a geosynchronous orbit GEO satellite, a highly elliptical orbit HEO satellite, a medium earth orbit MEO satellite, or a low earth orbit LEO satellite.

17. A communication method, characterized in that: include: The terminal device receives first information from the network device; wherein the first information is used to indicate the type of terminal device that the network device allows to access; the type of terminal device that the network device allows to access includes: fixed terminal device type and / or mobile terminal device type; The terminal device initiates an access process to the network device or starts a cell reselection process based on the first information.

18. The method according to claim 17, characterized in that The terminal device receives first information from the network device, including: The terminal device receives the first information broadcast by the network device.

19. The method according to claim 17 or 18, characterized in that The terminal device initiates an access process to the network device according to the first information, or starts a cell reselection process, including: When the terminal device types allowed to access by the network device include the type to which the terminal device belongs, initiating an access process to the network device; or When the terminal device types allowed to access by the network device do not include the type to which the terminal device belongs, the cell reselection process is initiated.

20. The method of claim 19, wherein: The mobile terminal device type includes multiple sub-mobile terminal device types; When the terminal device type allowed to access by the network device includes the mobile terminal device type, the first information is also used to indicate at least one sub-mobile terminal device type allowed to access by the network device; When the terminal device type allowed to access by the network device includes the type to which the terminal device belongs, initiating an access process to the network device, including: In the case that the type to which the terminal device belongs is the mobile terminal device type, when the terminal device types allowed to access by the network device include the mobile terminal device type, and at least one sub-mobile terminal device type allowed to access by the network device includes the sub-mobile terminal device type to which the terminal device belongs, initiating an access process to the network device; The method further comprises: In the case that the type of the terminal device is the mobile terminal device type, when the terminal device types allowed to access by the network device include the mobile terminal device type, and at least one sub-mobile terminal device type allowed to access by the network device does not include the sub-mobile terminal device type to which the terminal device belongs, the cell reselection process is initiated.

21. The method of claim 20, wherein: The mobile terminal device type is a moving earth station ESIM, and the multiple sub-mobile terminal device types are: flight ESIM, navigation ESIM, and land ESIM.

22. The method according to any one of claims 17 to 21, characterized in that: When the terminal device type allowed to access by the network device includes the fixed terminal device type, the first information is also used to indicate a judgment condition that meets the fixed terminal device type; When the terminal device type allowed to access by the network device includes the type to which the terminal device belongs, initiating an access process to the network device or starting a cell reselection process according to the first information, including: In the case where the type of the terminal device is the fixed terminal device type, when the terminal device types allowed to access by the network device include the fixed terminal device type, and the terminal device meets the judgment condition, initiating an access process to the network device; In the case that the terminal device type is the fixed terminal device type, when the terminal device types allowed to access by the network device include the fixed terminal device type, and the terminal device does not meet the judgment condition, the cell reselection process is initiated.

23. The method of claim 22, wherein: The judgment condition includes any of the following: The terminal equipment is located in a fixed position; The terminal device moves within a set geographical range; The terminal device moves across a set number of geographical locations; or The terminal device moves to a set number of geographical locations, and the distance between any two geographical locations among the set number of geographical locations is less than a set distance threshold.

24. The method according to any one of claims 17 to 23, characterized in that The fixed terminal equipment type is fixed satellite service FSS terminal equipment.

25. The method according to any one of claims 17 to 24, characterized in that The first information is also used to indicate the services that the network device is allowed to implement; Initiating an access process to the network device according to the first information, or starting a cell reselection process, includes: When the service allowed to be implemented by the network device includes the service to be implemented by the terminal device, initiating an access process to the network device; or When the services allowed to be implemented by the network device do not include the services to be implemented by the terminal device, a cell reselection process is initiated.

26. The method according to any one of claims 17 to 25, characterized in that After initiating an access process to the network device, the method further includes: Sending an RRC connection establishment request message to the network device; wherein the RRC connection establishment request message includes at least one of the following: second information or third information, the second information is used to indicate the type of the terminal device, and the third information is used to indicate the antenna configuration of the terminal device; the type of the terminal device is: the fixed terminal device type or the mobile terminal device type; Receive an RRC connection establishment complete message from the network device, or receive an RRC connection rejection message from the network device.

27. The method of claim 26, wherein: The antenna configuration of the terminal device includes at least one of the following: Antenna type of the uplink and / or downlink antenna of the terminal device; or The beam adjustment capability of the terminal device.

28. The method according to claim 26 or 27, characterized in that The second information is also used to indicate the service to be implemented by the terminal device.

29. The method according to any one of claims 17 to 28, characterized in that Initiating an access process to the network device according to the first information, including: receiving fourth information broadcasted by the network device; the fourth information is used to indicate the running track type or running position information of the network device; An access process is initiated to the network device according to the first information and the fourth information.

30. The method according to any one of claims 17 to 29, characterized in that The method further comprises: After accessing the network device, receiving measurement configuration information from the network device; the measurement configuration information includes at least one frequency point to be measured, and any frequency point to be measured corresponds to an operating track type or operating position information; According to the antenna configuration of the terminal device, a target frequency point corresponding to the target running track type or the target running position information is selected from the at least one frequency point to be measured; Performing cell measurement on a neighboring cell at the target frequency; or A neighboring cell on the target frequency point is selected as a target cell for cell switching or cell reselection.

31. A communication device, characterized in that: include: A communication unit for receiving and sending data; A processing unit, configured to execute the method according to any one of claims 1 to 30.

32. A communication device, characterized in that: include: transceiver, used to receive and send signals; A processor, configured to execute program instructions so that the communication device executes the method according to any one of claims 1 to 30.

33. A communication system, characterized in that: include: A network device for executing any one of claims 1-16, and a terminal device for executing any one of claims 17-30.

34. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 30.

35. A chip, characterized in that: The chip includes a processor; the processor is coupled to a memory, and the processor is used to read a computer program stored in the memory, so that the chip executes the method according to any one of claims 1 to 30.

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