Communication method and device, and storage medium

Abstract

The present invention provides a communication method and device, and a storage medium. The method comprises: determining a first core network function; and sending second information to the first core network function, wherein the second information comprises third information, and the third information is used for instructing a first terminal to access a network by means of a mobile access network. According to the present invention, a first terminal accesses a network by means of a mobile access network to notify a first core network function, and the first core network function can perform corresponding processing on data packets for uplink and downlink transmissions on the basis of third information, thereby improving the availability of the mobile access network having a wireless backhaul function.

Description

Communication method, device, and storage medium Technical Field

[0001] The present disclosure relates to the field of communications, and in particular to a communication method and device, and a storage medium. Background Art

[0002] A mobile access network with wireless backhaul functionality can act as an access network device for the terminal and provide access to the core network, i.e., it provides a New Radio (NR) access link to the terminal, through which the terminal can connect to the core network.

[0003] This type of mobile access network can be deployed on a moving vehicle and provide services to terminals located inside or outside the moving vehicle.

[0004] Summary of the Invention

[0005] In order to improve the availability of this type of access network, embodiments of the present disclosure provide a communication method and apparatus, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method is provided. The method is performed by a mobile access network, where the mobile access network has a wireless backhaul function. The method includes:

[0007] Determine the primary core network function;

[0008] Sending second information to the first core network function, where the second information includes:

[0009] The third information is used to indicate that the first terminal accesses the network through the mobile access network.

[0010] According to a second aspect of an embodiment of the present disclosure, a communication method is provided. The method is performed by a first core network function, including:

[0011] Receive second information, where the second information includes:

[0012] third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function;

[0013] It is determined that the second information comes from the mobile access network.

[0014] According to a third aspect of an embodiment of the present disclosure, a communication method is provided, where the method is performed by a second core network function, including:

[0015] Receive second information, where the second information includes:

[0016] The third information is used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function.

[0017] According to a fourth aspect of an embodiment of the present disclosure, a mobile access network is provided, wherein the mobile access network has a wireless backhaul function, including:

[0018] a processing module configured to determine a first core network function;

[0019] The transceiver module is configured to send second information to the first core network function, where the second information includes:

[0020] The third information is used to indicate that the first terminal accesses the network through the mobile access network.

[0021] According to a fifth aspect of an embodiment of the present disclosure, a first core network function is provided, including:

[0022] The transceiver module is configured to receive second information, where the second information includes:

[0023] third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function;

[0024] The processing module is configured to determine that the second information comes from the mobile access network.

[0025] According to a sixth aspect of an embodiment of the present disclosure, a second core network function is provided, including:

[0026] The transceiver module is configured to receive second information, where the second information includes:

[0027] The third information is used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function.

[0028] According to a seventh aspect of an embodiment of the present disclosure, a mobile access network with wireless access backhaul is provided, including:

[0029] one or more processors;

[0030] The processor is configured to execute the communication method according to any one of the first aspects.

[0031] According to an eighth aspect of an embodiment of the present disclosure, a first core network function is provided, including:

[0032] one or more processors;

[0033] The processor is used to execute the communication method described in any one of the second aspects.

[0034] According to a ninth aspect of an embodiment of the present disclosure, a second core network function is provided, including:

[0035] one or more processors;

[0036] The processor is used to execute the communication method described in any one of the third aspects.

[0037] According to a tenth aspect of an embodiment of the present disclosure, there is provided a communication system, including:

[0038] first terminal;

[0039] A mobile access network with wireless access backhaul, wherein the mobile access network with wireless access backhaul is configured to implement the communication method according to any one of the first aspects;

[0040] A first core network function, wherein the first core network function is configured to implement the communication method according to any one of the second aspects;

[0041] The second core network function is configured to implement the communication method described in any one of the third aspects.

[0042] According to an eleventh aspect of an embodiment of the present disclosure, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method described in any one of the first aspect, the second aspect or the third aspect.

[0043] In an embodiment of the present disclosure, the mobile access network with a wireless backhaul function can send a second message to the determined first core network function, and inform the first core network function through the third information included in the second message that the first terminal accesses the network through the mobile access network. The first core network function can perform corresponding processing on the data packets transmitted uplink and downlink based on the third information, thereby improving the availability of the mobile access network with a wireless backhaul function.

[0044] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0046] FIG1A-1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0047] Figure 1A-2 is a schematic diagram of the architecture of a mobile access network in a 5G core network according to an embodiment of the present disclosure.

[0048] FIG1B is a schematic diagram of an exemplary flow chart of an N2 message routing process on a backhaul protocol data unit session provided according to an embodiment of the present disclosure.

[0049] FIG1C is a schematic diagram of an exemplary flow chart of a connection scenario of a mobile access network authorization process provided according to an embodiment of the present disclosure.

[0050] FIG1D is a schematic diagram of an exemplary flow chart of the mobile access network authorization status change process provided according to an embodiment of the present disclosure.

[0051] FIG2 is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0052] FIG3A is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0053] FIG3B is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0054] FIG3C is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0055] FIG4 is a schematic diagram of an exemplary interaction of a communication method provided according to an embodiment of the present disclosure.

[0056] FIG5A is an exemplary block diagram of a mobile access network according to an embodiment of the present disclosure.

[0057] FIG5B is an exemplary block diagram of a first core network function provided according to an embodiment of the present disclosure.

[0058] FIG5C is an exemplary block diagram of a second core network function provided according to an embodiment of the present disclosure.

[0059] FIG6A is a schematic diagram of an exemplary interaction of a communication device according to an embodiment of the present disclosure.

[0060] FIG6B is an exemplary interaction diagram of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0061] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0062] The embodiments of the present disclosure provide a communication method, a device, and a storage medium.

[0063] The embodiments of the present disclosure provide a communication method, a device, and a storage medium.

[0064] In a first aspect, an embodiment of the present disclosure provides a communication method, which is performed by a mobile access network having a wireless backhaul function. The method includes:

[0065] Determine the primary core network function;

[0066] Sending second information to the first core network function, where the second information includes:

[0067] The third information is used to indicate that the first terminal accesses the network through the mobile access network.

[0068] In the above embodiment, the mobile access network with wireless backhaul functionality may send second information to the first core network function, including third information, where the third information may be used to instruct the first terminal to access the network through the mobile access network, thereby improving the availability of the mobile access network with wireless backhaul functionality.

[0069] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0070] First information sent by the first terminal is received, where the first information is used by the first terminal to request access to a network.

[0071] In the above embodiment, the mobile access network with wireless backhaul function can receive the first information sent by the first terminal, thereby sending the second information to the first core network function. The above process can be triggered by the first terminal, which is simple to implement and has high availability.

[0072] In combination with some embodiments of the first aspect, in some embodiments, the second information also includes the payload of the first information.

[0073] In the above embodiment, the second information may further include the payload of the first information, which has high availability.

[0074] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first core network function includes:

[0075] A core network function supporting the mobile access network is determined as the first core network function.

[0076] In the above embodiment, the mobile access network with wireless backhaul function may determine the first core network function based on whether the mobile access network is supported, thereby improving the availability of the mobile access network with wireless backhaul function.

[0077] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0078] Triggering modification and / or establishment of a backhaul protocol data unit session, where the backhaul protocol data unit session is used to access the first core network function.

[0079] In the above embodiment, the mobile access network with wireless backhaul function can trigger the modification and / or establishment of the backhaul protocol data unit session to improve the reliability of information transmission.

[0080] In conjunction with some embodiments of the first aspect, in some embodiments, the source address of the data packet of the second information is the first address of the access network function of the mobile access network, and / or the destination address of the data packet of the second information is the third address of the first core network function;

[0081] The sending the second information to the first core network function includes:

[0082] The data packet is sent to the first core network function via a user plane path of a backhaul protocol data unit session.

[0083] In the above embodiment, the mobile access network with wireless backhaul functionality can send the data packet to the first core network function via the user plane path of the backhaul protocol data unit session based on the source address and destination address of the data packet. This enables uplink information transmission and improves the availability of the mobile access network with wireless backhaul functionality.

[0084] In conjunction with some embodiments of the first aspect, in some embodiments, the source address of the data packet of the second information is the second address of the terminal function of the mobile access network, and the second address is used for the backhaul protocol data unit session to identify the terminal function of the mobile access network, and / or the destination address of the data packet of the second information is the third address of the first core network function;

[0085] The sending the second information to the first core network function includes:

[0086] The data packet is sent to the first core network function via a user plane path of a backhaul protocol data unit session.

[0087] In the above embodiment, the mobile access network with wireless backhaul functionality can send the data packet to the first core network function via the user plane path of the backhaul protocol data unit session based on the source address and destination address of the data packet. This enables uplink information transmission and improves the availability of the mobile access network with wireless backhaul functionality.

[0088] In conjunction with some embodiments of the first aspect, in some embodiments, the third information includes at least one of the following:

[0089] User location information; wherein the user location information includes at least one of the following:

[0090] first location information, where the first location is a location of an access network function of the mobile access network;

[0091] second location information, where the second location is the location of the terminal function of the mobile access network;

[0092] Access type information; wherein the access network type information is used to indicate that the first terminal accesses the network through the mobile access network;

[0093] First indication information, where the first indication information is used to indicate whether the first terminal accesses the network through the mobile access network.

[0094] In the above embodiment, the third information may include at least one of the above items, and has high availability.

[0095] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0096] receiving fifth information sent by the first core network function; wherein the fifth information is information of a second core network function, the second core network function being a core network function re-determined by the first core network function for the first terminal, and when the first core network function determines the second core network function, considering whether the second core network function supports the mobile access network;

[0097] establishing a connection with the second core network function based on the fifth information;

[0098] Send the second information to the second core network function.

[0099] In the above embodiment, the mobile access network with wireless backhaul function can send second information to the second core network function based on the fifth information sent by the first core network function, and realize uplink transmission when the core network function is re-determined.

[0100] In conjunction with some embodiments of the first aspect, in some embodiments, the second information further includes:

[0101] a second address, where the second address is used to return a protocol data unit session identifier to a terminal function of a mobile access network;

[0102] The second address includes at least one of the following:

[0103] an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network;

[0104] a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network;

[0105] The fully qualified domain name of the terminal function of the mobile access network;

[0106] The universal public subscription identity of the terminal function of the mobile access network.

[0107] In the above embodiment, the second information may further include a second address, which is simple to implement and has high usability.

[0108] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes any one of the following:

[0109] receiving fourth information sent by the first core network function through a backhaul protocol data unit session based on the second address;

[0110] Receive fourth information sent by the second core network function based on the second address through the return protocol data unit session.

[0111] In the above embodiment, the mobile access network with the wireless backhaul function can receive the fourth information sent by the first core network function or the second core network function based on the second address, thereby realizing downlink transmission with high availability.

[0112] In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a first core network function and includes:

[0113] Receive second information, where the second information includes:

[0114] third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function;

[0115] It is determined that the second information comes from the mobile access network.

[0116] In the above embodiment, the first core network function may receive the second information and determine that the second information comes from the mobile access network, thereby improving the availability of the mobile access network with a wireless backhaul function.

[0117] In combination with some embodiments of the second aspect, in some embodiments, the second information also includes a payload of first information, and the first information is used by the first terminal to request access to the network.

[0118] In conjunction with some embodiments of the second aspect, in some embodiments, determining that the second information comes from the mobile access network includes at least one of the following:

[0119] The third information includes user location information, and based on the user location information, it is determined that the second information comes from the mobile access network; wherein the user location information includes at least one of the following:

[0120] first location information, where the first location is a location of an access network function of the mobile access network;

[0121] second location information, where the second location is the location of the terminal function of the mobile access network;

[0122] The third information includes access type information, and based on the access type information, it is determined that the second information comes from the mobile access network;

[0123] The third information includes first indication information. Based on the first indication information, it is determined that the second information comes from the mobile access network. The first indication information is used to indicate whether the first terminal accesses the network through the mobile access network.

[0124] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0125] There is no need to redetermine the core network function for the first terminal, and the second information is initial terminal information, so a terminal context is created.

[0126] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes at least one of the following:

[0127] The first core network function supports the mobile access network, and it is determined that there is no need to redetermine the core network function for the first terminal.

[0128] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0129] Send sixth information to the access network function of the mobile access network; wherein the sixth information is used to indicate that the first core network function supports the mobile access network.

[0130] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0131] The third information is recorded in the terminal context.

[0132] In conjunction with some embodiments of the second aspect, in some embodiments, the second information further includes:

[0133] a second address, where the second address is used to return a protocol data unit session identifier of a terminal function of the mobile access network;

[0134] The second address includes at least one of the following:

[0135] an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network;

[0136] a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network;

[0137] The fully qualified domain name of the terminal function of the mobile access network;

[0138] The universal public subscription identity of the terminal function of the mobile access network.

[0139] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0140] The second address is recorded in the terminal context.

[0141] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0142] sending fourth information to the mobile access network based on the second address by backhauling a protocol data unit session; or

[0143] Based on the second information, acquiring a fourth address, where the fourth address is an address used by the mobile access network and / or the backhaul protocol data unit session to identify a terminal function of the mobile access network;

[0144] Based on the fourth address, fourth information is sent to the mobile access network through a backhaul protocol data unit session.

[0145] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0146] It is necessary to redetermine a core network function for the first terminal and determine a second core network function;

[0147] Sending fifth information to the mobile access network, where the fifth information is information about the second core network function; or

[0148] Send the second information to the second core network function.

[0149] In combination with some embodiments of the second aspect, in some embodiments, when determining the second core network function, whether the second core network function supports the mobile access network is considered.

[0150] In a third aspect, an embodiment of the present disclosure provides a communication method, which is performed by a second core network function and includes:

[0151] Receive second information, where the second information includes:

[0152] The third information is used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function.

[0153] In the above embodiment, the second core network function can receive the above second information, thereby improving the availability of the mobile access network with wireless backhaul function.

[0154] In combination with some embodiments of the third aspect, in some embodiments, the second information also includes a payload of first information, and the first information is used by the first terminal to request access to the network.

[0155] In conjunction with some embodiments of the third aspect, in some embodiments, receiving the second information includes any one of the following:

[0156] receiving the second information sent by the mobile access network;

[0157] Receive the second information sent by the first core network function; wherein the first core network function is the core network function to which the access network function of the mobile access network is connected.

[0158] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0159] The second information is initial terminal information, which creates a terminal context.

[0160] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0161] The third information is recorded in the terminal context.

[0162] In conjunction with some embodiments of the third aspect, in some embodiments, the third information includes at least one of the following:

[0163] first location information, where the first location is a location of an access network function of the mobile access network;

[0164] second location information, where the second location is the location of the terminal function of the mobile access network;

[0165] Access type information; wherein the access network type information is used to indicate that the first terminal accesses the network through the mobile access network;

[0166] First indication information, where the first indication information is used to indicate whether the first terminal accesses the network through the mobile access network.

[0167] In conjunction with some embodiments of the third aspect, in some embodiments, the second information further includes:

[0168] a second address, where the second address is used to return a protocol data unit session identifier of a terminal function of the mobile access network;

[0169] The second address includes at least one of the following:

[0170] an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network;

[0171] a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network;

[0172] The fully qualified domain name of the terminal function of the mobile access network;

[0173] The universal public subscription identity of the terminal function of the mobile access network.

[0174] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0175] sending fourth information to the mobile access network based on the second address by backhauling a protocol data unit session; or

[0176] Based on the second information, acquiring a fourth address, where the fourth address is an address used by the mobile access network and / or the backhaul protocol data unit session to identify a terminal function of the mobile access network;

[0177] Based on the fourth address, fourth information is sent to the mobile access network through a backhaul protocol data unit session.

[0178] In a fourth aspect, an embodiment of the present disclosure provides a mobile access network having a wireless backhaul function, including:

[0179] a processing module configured to determine a first core network function;

[0180] The transceiver module is configured to send second information to the first core network function, where the second information includes:

[0181] The third information is used to indicate that the first terminal accesses the network through the mobile access network.

[0182] In a fifth aspect, an embodiment of the present disclosure proposes a first core network function, including:

[0183] The transceiver module is configured to receive second information, where the second information includes:

[0184] third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function;

[0185] The processing module is configured to determine that the second information comes from the mobile access network.

[0186] In a sixth aspect, an embodiment of the present disclosure proposes a second core network function, including:

[0187] The transceiver module is configured to receive second information, where the second information includes:

[0188] The third information is used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function.

[0189] In a seventh aspect, an embodiment of the present disclosure provides a mobile access network with wireless access backhaul, including:

[0190] one or more processors;

[0191] The processor is configured to execute the communication method according to any one of the first aspects.

[0192] In an eighth aspect, an embodiment of the present disclosure proposes a first core network function, including:

[0193] one or more processors;

[0194] The processor is used to execute the communication method described in any one of the second aspects.

[0195] In a ninth aspect, an embodiment of the present disclosure proposes a second core network function, including:

[0196] one or more processors;

[0197] The processor is used to execute the communication method described in any one of the third aspects.

[0198] In a tenth aspect, an embodiment of the present disclosure provides a communication system, including:

[0199] first terminal;

[0200] A mobile access network with wireless access backhaul, wherein the mobile access network with wireless access backhaul is configured to implement the communication method according to any one of the first aspects;

[0201] a first core network function, wherein the first core network function is configured to implement the communication method described in any one of the second aspects;

[0202] The second core network function is configured to implement the communication method described in any one of the third aspects.

[0203] In the eleventh aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method as described in any one of the first aspect, the second aspect or the third aspect.

[0204] It is understandable that the mobile access network, the first core network function, the second core network function, the communication system, and the storage medium are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0205] In some embodiments, the terms communication method, connection establishment method, and network access method are interchangeable, and the terms communication system, connection establishment system, and network access system are interchangeable.

[0206] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0207] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0208] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0209] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0210] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0211] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0212] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0213] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is similar when there are more branches such as A, B, C, etc.

[0214] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0215] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0216] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0217] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0218] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0219] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0220] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0221] FIG1A-1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0222] As shown in FIG1A-1 , a communication system 100 includes a mobile access network 101 , a first core network function 102 , and a second core network function 103 .

[0223] In some embodiments, the mobile access network 101 has wireless backhaul capabilities, supporting a wider range of mobility scenarios, such as deployment on mobile vehicles. The mobile access network 101 may include both access network and terminal functions. Of course, in some scenarios, it may also include some core network functions (e.g., user plane functions (UPF)) and local data networks, though this disclosure does not limit this.

[0224] In some embodiments, the first core network function 102 may be a device including multiple network elements, or may be multiple devices or device groups, each including all or part of multiple network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0225] In some embodiments, the first core network function 102 in the present disclosure may be, for example, an access and mobility management function (AMF).

[0226] In some embodiments, the second core network function 103 may be a device including multiple network elements, or may be multiple devices or device groups, each including all or part of multiple network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0227] In some embodiments, the second core network device 103 in the present disclosure may be, for example, an AMF.

[0228] The first core network function 102 and the second core network function 103 may be different AMFs. The first core network function 102 and the second core network function 103 may both support the mobile access network 101 or neither support the mobile access network, or one of the core network functions may support the mobile access network, which is not limited in this disclosure.

[0229] In some embodiments, the communication system 100 may further include a first terminal 104 .

[0230] In some embodiments, the first terminal 104 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0231] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0232] In some embodiments, the architecture of the mobile access network with wireless backhaul functionality in the 5G core network may be as shown in FIG. 1A-2 .

[0233] The first terminal 104 can access the access network function of the mobile access network 101, and the terminal function of the mobile access network 101 can access the backhaul 5G core network through the backhaul access network. In addition, the access network function of the mobile access network 101 can be connected to the 5G core network of the first terminal 104 (including the first core network function 102 and the second core network function 103) through the N2 or N3 interface based on the backhaul protocol data unit session.

[0234] The features of the Mobile gNB with wireless access backhaul (MWAB) are based on the following architecture:

[0235] -Composed of access network functions (MWAB-gNB) and terminal functions (MWAB-UE);

[0236] -MWAB-gNB has gNB functions;

[0237] N2 / N3 and Operation Administration and Maintenance (OAM) access to the MWAB-gNB is achieved through an Internet Protocol (IP) connection provided by the protocol data unit session of the terminal function;

[0238] -MWAB-UE connects to the NG-RAN via a single NR Uu hop (i.e., the terminal functions access the gNB via the NRUu interface which can use terrestrial network (TN) or non-terrestrial network (NTN) technology);

[0239] -The MWAB can serve a terminal located inside or outside a vehicle where a relay is installed;

[0240] -NR Uu is used for the radio link between the MWAB-gNB and the served terminal. The NR Uu radio link between the MWAB-gNB and the served terminal does not use NTN technology;

[0241] - The Location Services (LCS) framework is used to provide positioning services to the served terminals;

[0242] -The MWAB can be connected to the NG-RAN of the Public Land Mobile Network (PLMN) or the NG-RAN of the Stand-alone Non-Public Network (SNPN);

[0243] -The MWAB-gNB may broadcast a first PLMN identity, which may be different from a second PLMN identity, where the second PLMN identity is the identity of the PLMN to which the MWAB-UE is connected;

[0244] The serving PLMN of a terminal served by the mobile access network is the PLMN broadcast by the MWAB-gNB to which it resides / is connected. The identity of this PLMN may be different from the identity of the PLMN serving the MWAB-UE.

[0245] When providing services to the terminal via MWAB-gNB, N2 access is over the IP connection provided by the Protocol Data Unit (PDU) session of the MWAB-UE. Therefore, when the core network serves the terminal connected via the MWAB-gNB, it should support the transmission of N2 messages over the IP connection provided by the PDU session of the MWAB-UE.

[0246] Among them, the N2 message is a message for transmitting data between the access network and the core network function.

[0247] In some embodiments, referring to FIG. 1B , an exemplary flowchart of an N2 message routing process on a backhaul PDU session is provided, including the following steps:

[0248] Step S1201: When the terminal function of the mobile access network establishes a PDU session to access the OAM server, the AMF address used to connect to the access network function of the mobile access network can be configured by the OAM server based on the location of the mobile access network.

[0249] In step S1202, the access network function of the mobile access network sends a connection request for the N2 return transmission link to the AMF via the interface with the terminal function of the mobile access network, and triggers the local configuration or user routing policy (UE Route Selection Policy, URSP) rule based on the terminal function of the mobile access network to establish a PDU session with the dedicated data network name (DNN) and / or single network slice selection assistance information (S-NSSAI).

[0250] In step S1203, the mobile access network generates an uplink (UL) N2 message (eg, an NG SETUP REQUEST message), whose source IP address is the IP address associated with the N2 connection provided by the terminal function of the mobile access network, and the destination IP address is the AMF address.

[0251] In step S1204 , the UL N2 message serving as UL service data is routed to a PDU session anchor function (PSA) of the backhaul PDU session.

[0252] Step S1205: The PSA that transmits the PDU session routes the N2 message to the AMF.

[0253] In step S1206, the AMF generates a downlink (DL) N2 message (e.g., an NG SETUP RESPONSE message), whose source IP address is the AMF address and the destination IP address is the IP address of the terminal function of the mobile access network.

[0254] Step S1207: The DL N2 message is routed to the PSA of the backhaul PDU session.

[0255] Step S1208: The PSA that returns the PDU session routes the DL N2 message to the mobile access network.

[0256] In addition, the access network function of the mobile access network includes an indication in the NG SETUP REQUEST message sent to the AMF, which can be used to indicate that the access network configured as the access network is the access network function of the mobile access network. The AMF stores this information.

[0257] In some embodiments, referring to FIG. 1C , an exemplary flowchart of the mobile access network authorization process is provided, including the following steps:

[0258] Step S1301: The terminal function of the mobile access network triggers registration with the selected PLMN in the NR cell.

[0259] The terminal function of the mobile access network provides mobile access network indications to the backhaul AMF through Radio Resource Control (RRC) and NG Application Protocol (NGAP) messages.

[0260] Among them, backhaul AMF refers to the service AMF of the terminal function of the mobile access network.

[0261] In step S1302, the AMF retrieves the terminal function subscription data of the mobile access network from the User Data Management (UDM) function and authorizes the operation of the mobile access network.

[0262] Step S1303: The backhaul AMF accepts the registration request of the terminal function of the mobile access network and provides the authorization status of the mobile access network to the terminal function of the mobile access network and the backhaul access network (the service access network of the terminal function of the mobile access network).

[0263] In step S1304, based on the provided authorization information, the mobile access network establishes an IP connection for backhaul. Alternatively, the terminal function of the mobile access network may establish a PDU session based on the authorization status (i.e., authorization) of the mobile access network provided by the AMF to provide an IP connection for backhaul.

[0264] Step S1305: The access network function of the mobile access network establishes a connection with the AMF via the return IP connection provided by the terminal function of the mobile access network.

[0265] Step S1306: The access network function of the mobile access network initiates a service to the terminal.

[0266] Step S1307: The terminal allowed to access the mobile access network cell selects the cell and triggers a registration request.

[0267] In some embodiments, referring to FIG. 1D , an exemplary flow chart of the mobile access network authorization status change process is provided, including the following steps:

[0268] Changes to the terminal function authorization status of a registered mobile access network:

[0269] Step S1401, the AMF triggers the non-access stratum (NAS) process of terminal configuration update and notifies the terminal function of the mobile access network of the change of mobile access network authorization status.

[0270] When the terminal function authorization status of the mobile access network is changed from allowed to not allowed, the backhaul AMF can provide one of the following additional information in the Terminal Configuration Update Command message:

[0271] a) Indication information used to indicate that the terminal function of the mobile access network needs to be deregistered.

[0272] b) Indication information used to indicate the need to release the backhaul PDU session.

[0273] The terminal function authorization status of the mobile access network changes from allowed to not allowed:

[0274] Step S1402: Based on the authorization information provided by the terminal function of the mobile access network, the access network function of the mobile access network triggers the movement of the connected terminal to another cell.

[0275] Step S1403, after all terminals are moved, the access network function of the mobile access network can remove the transport network layer association (TNLA) and NGAP connection with the AMF.

[0276] In step S1404, the mobile access network releases the IP connection based on the additional information received in step S1401, or the terminal function of the mobile access network may release the backhaul PDU session.

[0277] The terminal function of the mobile access network may deregister based on the additional information received in step S1401. Alternatively, after the backhaul PDU session is released or the timer started in step S1401 expires, the backhaul AMF may trigger deregistration of the access network function of the mobile access network from the network side according to local policy. The access network function of the mobile access network closes the air interface.

[0278] The terminal function authorization status of the mobile access network changes from not allowed to allowed:

[0279] Steps S1405 to S1408 are the same as steps S1304 to S1307, and will not be described in detail here.

[0280] It can be seen that the NG-RAN node acts as the access network function of the mobile access network, and manages the NG connection with the AMF based on the authorization of the terminal function of the mobile access network, including NG recovery or NG establishment when authorized, and NG suspension or NG release when not authorized. The terminal function of the mobile access network provides a mobile access network indication to the backhaul AMF through RRC and NGAP messages to obtain mobile access network authorization. However, the terminal's access to the network via the mobile access network is not indicated to the UE AMF (the serving AMF of the terminal accessing the network through the mobile access network). It also does not consider whether the connected AMF can support access through the mobile access network, and whether the AMF can support the N2 message transmitted by the IP connection provided by the backhaul PDU session of the terminal in the mobile access network.

[0281] In order to inform the first core network function that the first terminal accesses the network through the mobile access network and improve the availability of the mobile access network with wireless backhaul function, the present disclosure provides the following communication method, device, and storage medium.

[0282] FIG2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0283] Step S2101: The first terminal 104 sends first information to the mobile access network 101.

[0284] In some embodiments, the first information may be an N1 message (or referred to as N1 information), wherein the N1 message is a message exchanged between the terminal and the terminal's serving AMF through the NG-RAN.

[0285] In some embodiments, the first information may be used by the first terminal 104 to request access to the network.

[0286] In some embodiments, the name of the first information is not limited and can be interchangeable with request information, request message, connection request information, etc.

[0287] Specifically, the first information may be any request initiated by the first terminal 104, such as registration request information, service request message, registration update request, session establishment connection request, session modification request, etc. This disclosure does not limit this.

[0288] In some embodiments, the mobile access network 101 receives the first information. Specifically, the first information may be received by an access network function of the mobile access network.

[0289] In some embodiments, step S2101 is an optional step.

[0290] Exemplarily, the mobile access network 101 actively triggers the first terminal 104 to access the network. Step S2101 may not be performed.

[0291] Step S2102 , the mobile access network 101 determines the first core network function 102 .

[0292] In some embodiments, the mobile access network 101 actively triggers the first terminal 104 to access the network, at which time the first core network function 102 can be determined.

[0293] In some embodiments, the mobile access network 101 may trigger the first terminal 104 to access the network based on the first information sent by the first terminal 104 , at which time the first core network function 102 may be determined.

[0294] In some embodiments, when the mobile access network 101 determines the first core network function, it considers whether it supports the mobile access network.

[0295] For example, AMF#1 supports the mobile access network, and AMF#2 does not support the mobile access network. The mobile access network can determine AMF#1 as the first core network function.

[0296] In some embodiments, the mobile access network 101 may also use other methods to determine the first core network function 102, and when determining the first core network function 102, it may not be considered whether it supports the mobile access network.

[0297] In some embodiments, the mobile access network 101 has established a connection with the first core network function 102 to serve the terminal (i.e., the first terminal 104), and there is no need to replace the connected first core network function 102. The current serving core network function can be directly determined as the first core network function 102.

[0298] The above description is merely an exemplary description, and the present disclosure does not limit the solution for the mobile access network 101 to determine the first core network function 102 .

[0299] In some embodiments, the access network mentioned in the present disclosure includes but is not limited to the initial access of the first terminal 104 to the network and / or the update after accessing the network, and the present disclosure does not limit this.

[0300] In step S2103, the mobile access network 101 triggers modification and / or establishment of a backhaul protocol data unit session.

[0301] In some embodiments, the backhaul protocol data unit session may be used to access the first core network function 102. Of course, the backhaul protocol data unit session may also be used to access other functions, which is not limited in the present disclosure.

[0302] It can be understood that step S2103 is an optional step.

[0303] Exemplarily, when a backhaul protocol data unit session has been established between the mobile access network 101 and the first core network function 102, establishment of the backhaul protocol data unit session will not be triggered, but modification of the backhaul protocol data unit session may be triggered.

[0304] In step S2104, the mobile access network 101 sends the second information to the first core network function 102.

[0305] In some embodiments, the second information may be an uplink N2 message.

[0306] In some embodiments, the name of the second information is not limited.

[0307] In some embodiments, the second information may include third information, where the third information is used to indicate that the first terminal 104 accesses the network through the mobile access network 101 .

[0308] For example, the third information may include but is not limited to at least one of the following:

[0309] User location information; access type information; first indication information.

[0310] The user location information may include but is not limited to at least one of the following:

[0311] first location information, where the first location is a location of an access network function of the mobile access network;

[0312] The second location information, the second location is the location of the terminal function of the mobile access network.

[0313] The first location information may be a Tracking Area Identifier (TAI) and / or a Cell Identifier (Cell Identifier) ​​of an access network function of the mobile access network.

[0314] To improve the accuracy of user location information, the second location information may be used as additional information. The second location information may be geographic location information of a terminal function in a mobile access network, relative location information of functions or devices relative to other known locations, or the like.

[0315] The access type information may be used to indicate that the first terminal 104 accesses the network through the mobile access network 101. The access type information may be determined through RAT information.

[0316] The first indication information may be used to indicate whether the first terminal 104 accesses the network through the mobile access network 101 .

[0317] Exemplarily, an information unit may be added to the second information. When the information unit is set to “0” or “1”, it may be used to indicate whether the first terminal 104 accesses the network through the mobile access network 101 .

[0318] Exemplarily, an information unit may be added to the second information. When the information unit is set to “true” or “false”, it may be used to indicate whether the first terminal 104 accesses the network through the mobile access network 101 .

[0319] Exemplarily, if the second information includes this information element, it indicates that the first terminal 104 accesses the network through the mobile access network 101. If the second information does not include this information element, it indicates that the first terminal 104 does not access the network through the mobile access network 101.

[0320] The above description is merely exemplary, and the first indication information may also be carried in one bit in the second information, for example, the bit may be set to "0" or "1" to indicate whether the first terminal 104 accesses the network through the mobile access network 101. The specific implementation will not be described in detail.

[0321] In some embodiments, if the mobile access network 101 sends the second information to the first core network function 102 based on the first information, the second information may further include a payload of the first information.

[0322] In some embodiments, the second information may further include a second address.

[0323] The second address is used to return the terminal function of the protocol data unit session identifier mobile access network.

[0324] Exemplarily, the second address may include but is not limited to at least one of the following:

[0325] an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network;

[0326] a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network;

[0327] The fully qualified domain name of the terminal function of the mobile access network;

[0328] Universal public subscription identity for terminal functions of mobile access networks.

[0329] In some embodiments, the second information includes the third information. Alternatively, the second information includes the third information and the payload of the first information, or includes the third information and the second address, or includes the third information, the payload of the first information, and the second address. Of course, the second information may also include other information, which is not limited in this disclosure.

[0330] In some embodiments, the mobile access network 101 may encapsulate the data packet of the second information in the following manner:

[0331] Method 1: Use the first address of the access network function of the mobile access network as the source address of the data packet, and use the third address of the first core network function as the destination address of the data packet.

[0332] Method 2: Use the second address of the terminal function of the mobile access network as the source address of the data packet, and use the third address of the first core network function as the destination address of the data packet.

[0333] Furthermore, the mobile access network 101 may send the data packet encapsulating the second information to the first core network function 102 via a user plane path of the backhaul protocol data unit session.

[0334] In some embodiments, the first core network function 102 receives the data packet encapsulating the second information.

[0335] In step S2105 , the first core network function 102 determines that the second information comes from the mobile access network 101 .

[0336] In some embodiments, the first core network function 102 determines whether the second information comes from the mobile access network 101 based on third information included in the second information.

[0337] In one example, the third information includes user location information, and the first core network function 102 can determine whether the second information comes from the mobile access network 101 based on the user location information, such as the above-mentioned first location information and / or second location information.

[0338] Exemplarily, the first core network function 102 records the first location information of the access network function of the mobile access network, such as the tracking area identifier and / or the cell identifier, and the first location information is available, so it can be determined that the second information comes from the mobile access network 101.

[0339] Exemplarily, the first core network function 102 combines the second location information and the first location information to jointly determine that the second information comes from the mobile access network 101 .

[0340] In an example, the third information includes access type information, and the first core network function 102 can determine whether the second information comes from the mobile access network 101 based on the access type information.

[0341] Exemplarily, the access type information may be used to indicate mobile access network access, and the first core network function 102 may determine that the second information comes from the mobile access network 101 based on the access type information.

[0342] In one example, the third information includes explicit first indication information, and the first core network function 102 can determine, based on the first indication information, whether the second information comes from the mobile access network 101. For example, if the information unit containing the first indication information is set to "true", the first core network function 102 can determine that the second information comes from the mobile access network 101.

[0343] In an example, the first core network function 102 determines whether the second information comes from the mobile access network 101 based on local terminal context record information.

[0344] Of course, the first indication information may be implicit indication information, as long as the first core network function 102 can determine whether the second information comes from the mobile access network 101 .

[0345] In one example, if the first core network function 102 determines that the second information comes from the mobile access network 101, the subsequent steps are continued. Otherwise, the steps are performed according to the existing process of the terminal accessing the first core network function through the NG-RAN.

[0346] In step S2106 , the first core network function 102 determines whether it is necessary to redetermine the core network function for the first terminal 104 .

[0347] In some embodiments, the first terminal 104 is accessed through the mobile access network 101 , and the first core network function 102 may determine whether it is necessary to redetermine the core network function that needs to be connected for the mobile access network 101 .

[0348] In some embodiments, the first core network function 102 supports the mobile access network and determines that there is no need to redetermine the core network function for the first terminal 104.

[0349] In some embodiments, the first core network function 102 sends sixth information to the access network function of the mobile access network 101, where the sixth information is used to indicate that the first core network function 102 supports the mobile access network 101. When the mobile access network 101 determines the first core network function 102 based on the sixth information, the first core network function 102 does not need to redetermine the core network function for the first terminal 104.

[0350] In some embodiments, when the first core network function 102 does not need to redetermine the core network function for the first terminal 104, subsequent steps S2107 to S2110 can be continued.

[0351] In some embodiments, the first core network function 102 does not support the mobile access network and determines that the core network function needs to be re-determined for the first terminal 104.

[0352] In some embodiments, when the first core network function 102 does not need to redetermine the core network function for the first terminal 104, subsequent steps S2111 to S2115 can be continued.

[0353] Step S2107 : The first core network function 102 creates a terminal context.

[0354] In some embodiments, when there is no need to redetermine the core network function for the first terminal and the second information is initial terminal information, the first core network function 102 may create a terminal context.

[0355] Step S2108: The first core network function 102 records the third information in the terminal context.

[0356] In some embodiments, without the need to redetermine the core network function for the first terminal, if the second information is initial terminal information, the first core network function 102 can record third information in the created terminal context, and the third information is used to indicate that the first terminal 104 accesses the network through the mobile access network 101.

[0357] In some embodiments, when there is no need to redetermine the core network function for the first terminal, if the second information is not the initial terminal information, the first core network function 102 can initiate terminal context modification based on the second information, and also record the third information in the terminal context. The third information is used to indicate that the first terminal 104 accesses the network through the mobile access network 101.

[0358] In some embodiments, without redetermining the core network function for the first terminal, if the second information is not the initial terminal information, the first core network function 102 can initiate terminal context modification, and if the second information does not include the third information, there is no need to record the third information in the terminal context.

[0359] Step S2109: The first core network function 102 records the second address.

[0360] In some embodiments, if the second information includes a second address, the first core network function 102 may record the second address in the terminal context.

[0361] This operation is also applicable to the case where the second information is or is not the initial terminal information. As long as it carries the second address, it can be recorded. This disclosure does not limit this.

[0362] Step S2110: The first core network function 102 sends fourth information to the mobile access network via a backhaul protocol data unit session.

[0363] In some embodiments, the fourth information is a downlink N2 message.

[0364] In some embodiments, the first core network function 102 may send fourth information to the mobile access network through the backhaul protocol data unit session based on the recorded second address.

[0365] Exemplarily, the first core network function 102 may send the fourth information to the terminal of the mobile access network based on the Internet Protocol address allocated for the return protocol data unit session of the terminal function of the mobile access network in the second address.

[0366] Exemplarily, the first core network function 102 can obtain the address information of the terminal function of the mobile access network that identifies the return protocol data unit session of the terminal function of the mobile access network based on the identifier of the service public land mobile network of the terminal function of the mobile access network in the second address, the fully qualified domain name of the terminal function of the mobile access network, or the universal public subscription identifier of the terminal function of the mobile access network, and send it to the terminal of the mobile access network.

[0367] In some embodiments, the second address is not included in the second information, and the first core network function 102 can obtain a fourth address based on the second information, where the fourth address is the address of the terminal function of the mobile access network 101 and / or the backhaul protocol data unit session used to identify the mobile access network.

[0368] Exemplarily, the fourth address may be the first address of an access network function of the mobile access network.

[0369] The first address may include but is not limited to a tracking area identifier, a cell identifier, etc. of an access network function.

[0370] The fourth address may also be other addresses. Any address that can be used by the mobile access network 101 and / or the backhaul protocol data unit session to identify the terminal function of the mobile access network may be used as the fourth address.

[0371] Furthermore, the first core network function 102 may send fourth information to the mobile access network through the backhaul protocol data unit session based on the fourth address, thereby completing the process of the first terminal 104 accessing the network.

[0372] In step S2111 , the first core network function 102 determines the second core network function 103 .

[0373] In some embodiments, the first core network function 102 considers whether the second core network function 103 supports the mobile access network 101 when determining the second core network function 103 .

[0374] For example, the first core network function 102 can consider whether the second core network function 103 supports the mobile access network 101 through at least one of the network repository function (NRF), local configuration, and service communication proxy (SCP), thereby determining the second core network function 103.

[0375] Step S2112 , the first core network function 102 sends fifth information to the mobile access network 101 .

[0376] In some embodiments, the fifth information may be information of the second core network function 103 .

[0377] Exemplarily, it may include the identifier of the second core network function 103, whether the second core network function 103 supports the mobile access network 101, etc.

[0378] Step S2113: The mobile access network 101 establishes a connection with the second core network function 103 based on the fifth information.

[0379] In step S2114 , the mobile access network 101 sends the second information to the second core network function 103 .

[0380] Furthermore, the second core network function 103 executes, for example, steps S2107 to S2110 described above. For example, if it is determined that the second information originates from the mobile access network 101, a terminal context may be created for the initial terminal information. If the second information includes a second address, the second address may be recorded. Furthermore, third information may be recorded in the terminal context.

[0381] The second core network function 103 may send the fourth information based on the second address or the fourth address to the mobile access network 101. The specific implementation process is similar to the implementation process of the aforementioned steps S2107 to S2110, and will not be repeated here.

[0382] Step S2115 , the first core network function 102 sends second information to the second core network function 103 .

[0383] In some embodiments, the first core network function 102 does not execute the above step S2112, but directly sends the second information to the second core network function 103.

[0384] Furthermore, the second core network function 103 executes, for example, the aforementioned steps S2107 to S2110 and sends the fourth information to the mobile access network.

[0385] In some embodiments, if the NG-RAN node supports a service-based interface (SBI) with the AMF, the above mechanism may also be applied, and the relevant information interaction may be implemented through service calls.

[0386] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0387] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0388] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0389] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0390] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2115. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, steps S2101+S2102 can be implemented as an independent embodiment, step S2103 can be implemented as an independent embodiment, steps S2101 to S2103 can be implemented as independent embodiments, step S2104 can be implemented as an independent embodiment, step S2105 can be implemented as an independent embodiment, step S2106 can be implemented as an independent embodiment, steps S2107 to S2110 can be implemented as independent embodiments, steps S2111 to S2114 can be implemented as independent embodiments, steps S2111+S2115 can be implemented as independent embodiments, and steps S2101 to S2115 can be implemented as independent embodiments, but are not limited thereto.

[0391] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the mobile access network 101 actively triggers the first terminal 104 to access the network, step S2101 may not be performed.

[0392] In some embodiments, step S2103 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the backhaul protocol data unit session has been established and / or does not need to be modified, step S2103 may not be performed.

[0393] In some embodiments, step S2107 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the second information is not the initial terminal information, step S2107 may not be performed.

[0394] In some embodiments, step S2109 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the second information does not include the second address, step S2109 may not be performed.

[0395] In some embodiments, steps S2111 to S2115 are optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the first core network function 102 supports the mobile access network 101, steps S2111 to S2115 may not be performed.

[0396] In some embodiments, steps S2112 to S2114 and step S2115 can be performed selectively.

[0397] In some embodiments, steps S2101 to S2115 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0398] In some embodiments, the execution order of steps S2101 to S2115 is not limited.

[0399] In the above embodiment, the mobile access network with wireless backhaul function can send second information to the determined first core network function, and inform the first core network function of the first terminal accessing the network through the mobile access network through the third information included in the second information. The first core network function can perform corresponding processing based on the third information to improve the availability of the mobile access network with wireless backhaul function.

[0400] FIG3A is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a communication method, which can be executed by a mobile access network 101. The method includes:

[0401] Step S3101, obtain first information.

[0402] In some embodiments, the mobile access network 101 may obtain the first information from the first terminal 104, but is not limited thereto. The mobile access network 101 may also receive the first information sent by other entities.

[0403] In some embodiments, the mobile access network 101 obtains first information determined according to a predefined rule.

[0404] In some embodiments, the mobile access network 101 performs processing to obtain the first information.

[0405] In some embodiments, step S3101 is omitted, the mobile access network 101 autonomously implements the function indicated by the first information, or the mobile access network 101 obtains the first information based on predefined rules or protocol agreements, or the above function is default or default.

[0406] In some embodiments, the optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0407] Step S3102: Determine the first core network function.

[0408] In some embodiments, the optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0409] Step S3103: triggering modification and / or establishment of a backhaul protocol data unit session.

[0410] In some embodiments, the optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0411] Step S3104, sending the second information.

[0412] In some embodiments, the mobile access network 101 sends the second information to the first core network function.

[0413] In some embodiments, the optional implementation of step S3103 can refer to the optional implementation of step S2104 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0414] Step S3105, obtain the fifth information.

[0415] In some embodiments, the fifth information may be information of the second core network function 103 .

[0416] In some embodiments, the mobile access network 101 may obtain the fifth information from the first core network function 102, but is not limited thereto and may also receive the fifth information sent by other entities.

[0417] In some embodiments, the mobile access network 101 obtains fifth information determined according to a predefined rule.

[0418] In some embodiments, the mobile access network 101 performs processing to obtain the fifth information.

[0419] In some embodiments, step S3101 is omitted, the mobile access network 101 autonomously implements the function indicated by the fifth information, or the mobile access network 101 obtains the fifth information based on predefined rules or protocol agreements, or the above function is default or default.

[0420] In some embodiments, the optional implementation of step S3105 can refer to the optional implementation of step S2112 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0421] Step S3106: Establish a connection with the second core network function 103.

[0422] In some embodiments, the optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0423] In some embodiments, the optional implementation of step S3106 can refer to the optional implementation of step S2113 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0424] Step S3107, sending the second information.

[0425] In some embodiments, the mobile access network 101 sends the second information to the second core network function 103 .

[0426] In some embodiments, the optional implementation of step S3107 can refer to the optional implementation of step S2114 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0427] Step S3108, obtain the fourth information.

[0428] In some embodiments, the mobile access network 101 may obtain the fourth information from the first core network function 102 , but is not limited thereto. The mobile access network 101 may also receive the fourth information sent by the second core network function 103 .

[0429] In some embodiments, the mobile access network 101 obtains fourth information determined according to a predefined rule.

[0430] In some embodiments, the mobile access network 101 performs processing to obtain the fourth information.

[0431] In some embodiments, step S3108 is omitted, the mobile access network 101 autonomously implements the function indicated by the fourth information, or the mobile access network 101 obtains the fourth information based on predefined rules or protocol agreements, or the above function is default or default.

[0432] In some embodiments, the optional implementation of step S3108 can refer to the optional implementation of step S2110 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0433] In some embodiments, steps S3101 to S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0434] In some embodiments, the execution order of steps S3101 to S3108 is not limited.

[0435] In the above embodiment, the mobile access network can inform the first core network function of the first terminal accessing the network through the mobile access network in the above manner, and the first core network function can perform corresponding processing based on the third information to achieve the purpose of the first terminal accessing the network through the mobile access network with wireless backhaul function, thereby improving the availability of the mobile access network with wireless backhaul function.

[0436] FIG3B is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a communication method, which can be executed by the first core network function 102, and the method includes:

[0437] Step S3201, obtain second information.

[0438] In some embodiments, the second information may be an uplink N2 message.

[0439] In some embodiments, the first core network function 102 may obtain the second information from the mobile access network 101, but is not limited thereto and may also receive the second information sent by other execution entities.

[0440] In some embodiments, the first core network function 102 obtains second information determined according to a predefined rule.

[0441] In some embodiments, the first core network function 102 performs processing to obtain the second information.

[0442] In some embodiments, step S3108 is omitted, the first core network function 102 autonomously implements the function indicated by the second information, or the first core network function 102 obtains the second information based on predefined rules or protocol agreements, or the above functions are default or default.

[0443] In some embodiments, the optional implementation of step S3201 can refer to the optional implementation of step S2104 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0444] Step S3202 , determining that the second information comes from the mobile access network 101 .

[0445] In some embodiments, the optional implementation of step S3202 can refer to the optional implementation of step S2105 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0446] Step S3203 , determining whether it is necessary to redetermine the core network function for the first terminal 104 .

[0447] In some embodiments, the optional implementation of step S3203 can refer to the optional implementation of step S2106 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0448] If there is no need to redetermine the core network function, steps S3204 to S3207 may continue to be executed; otherwise, steps S3208+S3209 or steps S3208+S3210 may be executed.

[0449] Step S3204: Create a terminal context.

[0450] In some embodiments, the optional implementation of step S3204 can refer to the optional implementation of step S2107 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0451] Step S3205: record the third information.

[0452] In some embodiments, the optional implementation of step S3205 can refer to the optional implementation of step S2108 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0453] Step S3206, record the second address.

[0454] In some embodiments, the optional implementation of step S3206 can refer to the optional implementation of step S2109 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0455] Step S3207, sending the fourth information.

[0456] In some embodiments, the fourth information may be a downlink N2 message.

[0457] In some embodiments, the first core network function 102 may send fourth information to the mobile access network 101 .

[0458] In some embodiments, the optional implementation of step S3207 can refer to the optional implementation of step S2110 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0459] Step S3208, determine the second core network function 103.

[0460] In some embodiments, the optional implementation of step S3208 can refer to the optional implementation of step S2111 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0461] Step S3209, sending the fifth information.

[0462] In some embodiments, the first core network function 102 sends fifth information to the mobile access network 101 .

[0463] In some embodiments, the optional implementation of step S3209 can refer to the optional implementation of step S2112 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0464] Step S3210, sending the second information.

[0465] In some embodiments, the first core network function 102 sends the second information to the second core network function 103 .

[0466] In some embodiments, the optional implementation of step S3210 can refer to the optional implementation of step S2115 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0467] In some embodiments, steps S3201 to S3210 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0468] In some embodiments, the execution order of steps S3201 to S3210 is not limited.

[0469] In the above embodiment, the first core network function can determine that the first terminal accesses the network through the mobile access network based on the third information, thereby performing corresponding processing to achieve the purpose of the first terminal accessing the network through the mobile access network with wireless backhaul function, and improve the availability of the mobile access network with wireless backhaul function.

[0470] FIG3C is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG3C , the embodiment of the present disclosure relates to a communication method, which can be executed by the second core network function 103, and the method includes:

[0471] Step S3301, obtain the second information.

[0472] In some embodiments, the second information may be an uplink N2 message.

[0473] In some embodiments, the second core network function 103 may obtain the second information from the mobile access network 101 , but is not limited thereto. The second information may also be received from the first core network function 102 .

[0474] In some embodiments, the second core network function 103 obtains second information determined according to a predefined rule.

[0475] In some embodiments, the second core network function 103 performs processing to obtain the second information.

[0476] In some embodiments, step S3301 is omitted, the second core network function 103 autonomously implements the function indicated by the second information, or the second core network function 103 obtains the second information based on predefined rules or protocol agreements, or the above functions are default or default.

[0477] In some embodiments, the optional implementation of step S3301 can refer to the optional implementation of step S2114 or S2115 in Figure 2, and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0478] Step S3302: Create a terminal context.

[0479] In some embodiments, the optional implementation of step S3302 can refer to the optional implementation of step S2107 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0480] Step S3303: record the third information.

[0481] In some embodiments, the optional implementation of step S3303 can refer to the optional implementation of step S2108 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0482] Step S3304, record the second address.

[0483] In some embodiments, the optional implementation of step S3304 can refer to the optional implementation of step S2109 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0484] Step S3305, sending the fourth information.

[0485] In some embodiments, the fourth information may be a downlink N2 message.

[0486] In some embodiments, the second core network function 103 may send fourth information to the mobile access network 101 .

[0487] In some embodiments, the optional implementation of step S3305 can refer to the optional implementation of step S2110 in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0488] In some embodiments, steps S3301 to S3305 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0489] In some embodiments, the execution order of steps S3301 to S3305 is not limited.

[0490] In the above embodiment, the second core network function can determine that the first terminal accesses the network through the mobile access network based on the third information, thereby performing corresponding processing to achieve the purpose of the first terminal accessing the network through the mobile access network with wireless backhaul function, and improve the availability of the mobile access network with wireless backhaul function.

[0491] The above process is further illustrated below with examples.

[0492] 4 is an interactive diagram of a communication method according to an embodiment of the present disclosure. In the embodiment of the present disclosure, the mobile access network may also be represented by MWAB, where the access network function is represented by MWAB-gNB and the terminal function is represented by MWAB-UE. The method includes:

[0493] Step S4101: The terminal function (MWAB-UE) of the mobile access network registers and provides mobile access network authorization to the terminal (ie, the aforementioned first terminal 104).

[0494] Step S4102: URSP rules for backhaul PDU sessions for OAM access and N2 / N3 access are configured for the terminal function (MWAB-UE) of the mobile access network.

[0495] Step S4103, the access network function of the mobile access network obtains the configuration information of the AMF to be connected.

[0496] Steps S4104 to S4116 describe an example of interacting N2 messages related to the terminal via the access network function of the mobile access network (MWAB-gNB) and the serving AMF (UE-AMF) of the served terminal, which N2 message can be triggered only by the N2 exchanged between the access network function of the mobile access network (MWAB-gNB) and the UE-AMF, or by the N2 message exchanged triggered by the N1 message exchange between the terminal and the AMF.

[0497] In step S4104, the terminal selects MWAB-gNB to access the network, and the terminal initiates an N1 message to the AMF. This may be, for example, a registration request message in the registration process.

[0498] In step S4105, the N1 message is sent from the terminal to the access network function (MWAB-gNB) of the mobile access network through the air interface information.

[0499] In step S4106, the access network function (MWAB-gNB) of the mobile access network selects the UE-AMF to be connected.

[0500] If the AMF information stored on the access network function of the mobile access network includes an indication of an AMF that supports mobile access network (MWAB) operation, for example, the relevant indication can be obtained from the configuration information obtained from the OAM server or obtained in a non-UE N2 interaction procedure between the MWAB-gNB and the UE AMF (such as the NG SETUP procedure or the AMF configuration update procedure), then the AMF that supports mobile access network operation is selected. The access network function of the mobile access network selects the AMF in a predefined manner and additionally considers whether the AMF supports mobile access network.

[0501] Step S4107 may trigger the modification / establishment of the backhaul PDU session accessing the selected UE-AMF.

[0502] In step S4108, the access network function of the mobile access network constructs an N2 message with the UE NGAP ID. When the N2 message is triggered by the N1 message, the N2 message includes the N1 message payload. The N2 message is encapsulated as an IP packet, wherein the source address of the data packet encapsulating the N2 message is the IP address of the terminal function (MWAB-UE) of the mobile access network used to backhaul the PDU session, and the destination address is the IP address of the selected UE-AMF.

[0503] The following information included in the N2 message for delivering the NAS message may be used to indicate that the terminal is accessing the network via a mobile access network (MWAB-gNB):

[0504] - User location information, which includes the TAI / CI of the access network function of the mobile access network collocated with the terminal function of the mobile access network. The location of the terminal function of the mobile access network may serve as additional user location information.

[0505] Based on the user location information and / or additional user location information, if the specific TAI / CI of the access network function of the mobile access network is configured and available at the AMF, the AMF can determine that the terminal is accessing the network via the mobile access network.

[0506] - Access type information, where the access type information indicates that the terminal is accessing the network through a mobile access network. The access type information may be implemented through RAT information.

[0507] - The first indication information, which is set to "true", indicates that the terminal access node is an NG-RAN node of the mobile access network.

[0508] Optionally, the second address of the terminal function of the mobile access network used to backhaul the PDU session may be included. For example, the information may include at least one of the following:

[0509] an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network;

[0510] a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network;

[0511] The fully qualified domain name of the terminal function of the mobile access network;

[0512] The universal public subscription identity of the terminal function of the mobile access network.

[0513] In step S4109, the N2 message with the above indication, such as the initial terminal message (INITIAL UE MESSAGE), is encapsulated as uplink data as described in step S4108, and the uplink data is sent to the AMF to be connected through the user plane path of the backhaul PDU session.

[0514] In step S4110, if the AMF determines that the sender of the N2 message is a mobile access network and AMF relocation is not required, after processing the N2 message, if the N2 message is initial terminal information, a terminal context is created; in addition, information about the terminal accessing the mobile access network is recorded in the terminal context.

[0515] The AMF determines that the sender of the N2 message is the mobile access network based on the information received in step S4109 or local information, including:

[0516] If the mobile access network indication is recorded in the local connected NG-RAN node information in step S4108, it is determined that the sender of the N2 message is the mobile access network.

[0517] - first indication information set to "true" is included in the N2 message, determining that the sender of the N2 message is a mobile access network;

[0518] - the access type information indicates a mobile access network; or

[0519] -The user location information indicates an NG-RAN node as an access network function for the mobile access network.

[0520] AMF relocation can be determined based on whether the AMF supports the mobile access network. If the AMF supporting the mobile access network is recorded and indicated to the mobile access network, the mobile access network has already considered the AMF supporting the mobile access network for AMF selection and does not need to consider relocation of the AMF supporting the mobile access network. Otherwise, the AMF supporting the mobile access network can be considered for relocation.

[0521] If the second address of the terminal function of the mobile access network for the backhaul PDU session is included in the N2 message, the AMF stores the second address in the UE context and it can be used to send a downlink N2 message from the UE AMF to the mobile access network via the backhaul PDU session.

[0522] Step S4111 , continuous N1 / N2 messages are exchanged for the service terminal via the mobile access network over the IP connection provided by the PDU session of the terminal function of the mobile access network.

[0523] In step S4112, if AMF relocation is triggered, the AMF selects a new AMF supporting the mobile access network (AMF1 in Figure 4). The AMF additionally considers the AMF supporting the mobile access network (UE-AMF1), for example, by performing discovery via NRF, based on local configuration, or via an associated selection of the SCP.

[0524] Step S4113, sending the information of the relocated AMF to the mobile access network.

[0525] Step S4114: The mobile access network connects to UE-AMF1 and sends an N2 message to UE-AMF1.

[0526] Step S4113a may replace steps S4113-S4114, where the UE-AMF sends the received N2 message to the UE-AMF1. For subsequent N2 interactions, it occurs between the UE-AMF1 and the mobile access network.

[0527] Step S4115: If the message is an INITIAL UE message, AMF1 creates a UE context after processing the N2 message, and records the information that the terminal accesses the mobile access network in the UE context.

[0528] When the terminal switches / moves to a normal NG-RAN node, the handover procedure is performed and the AMF does not need to support mobile access network related operations as described above, for example, the information indicating that the access node is not a mobile access network, and the AMF selection and AMF processing of the received N2 message do not need to consider mobile access network support.

[0529] When the terminal switches / moves from a normal NG-RAN node to a MWAB node for access, a handover process is performed, and the MWAB node sends an N2 message that does not contain an N1 message for a handover path request as above. The AMF needs to support mobile access network related operations, for example, information indicating that the access node is a mobile access network, and the AMF selection and AMF processing of the received N2 message need to consider mobile access network support.

[0530] When the backhaul session address information of the MWAB-UE changes, the N2 message sent by the above MWAB node (the existing N2 message, such as the switching process, or the N2 message triggered by the registration update process including N1, or the new N2 message) can carry the updated second address information. The AMF needs to support mobile access network related operations and perform related N2 message processing according to the updated second address information.

[0531] When the terminal switches / moves to another mobile access network, a handover procedure is performed, and the serving terminal still requires AMF to support the mobile access network, as described above, for example, the information indicating the access node is still the mobile access network, and the AMF selection and AMF processing of the received N2 message need to consider the mobile access network support.

[0532] If the NG-RAN node supports a service-based interface (SBI) with the AMF, the above mechanism can also be applied, and the relevant message interaction is implemented through service calls.

[0533] The embodiments of the present disclosure also propose a device for implementing any of the above methods. For example, a device is proposed, which includes units or modules for implementing the steps performed by each function (such as mobile access network, first core network function, and second core network function) in any of the above methods.

[0534] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD), taking a field programmable gate array (FPGA) as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be implemented in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the remaining part by the form of hardware circuits.

[0535] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0536] FIG5A is a schematic diagram of the structure of a mobile access network proposed in an embodiment of the present disclosure. As shown in FIG5A , a mobile access network 5100 may include: a processing module 5101 and a transceiver module 5102 .

[0537] In some embodiments, the processing module 5101 is configured to determine the first core network function.

[0538] In some embodiments, the transceiver module 5102 is configured to send second information to the first core network function, where the second information includes:

[0539] The third information is used to indicate that the first terminal accesses the network through the mobile access network.

[0540] In some embodiments, the processing module 5101 is used to execute at least one of the other steps (such as step S2103, but not limited thereto) executed by the mobile access network 5100 in any of the above methods, which will not be repeated here.

[0541] In some embodiments, the above-mentioned transceiver module 5102 is used to execute at least one of the communication steps such as sending and / or receiving performed by the mobile access network 5100 in any of the above methods (for example, step S2101, step S2102, step S2104, step S2113, step S2114, but not limited to these), which will not be repeated here.

[0542] FIG5B is a schematic diagram of the structure of the first core network function proposed in an embodiment of the present disclosure. As shown in FIG5B , the first core network function 5200 may include: a transceiver module 5201 and a processing module 5202 .

[0543] In some embodiments, the transceiver module 5201 is configured to receive second information, where the second information includes:

[0544] third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function;

[0545] In some embodiments, the processing module 5202 is configured to determine that the second information comes from the mobile access network.

[0546] In some embodiments, the above-mentioned transceiver module 5201 is used to execute at least one of the communication steps such as sending and / or receiving performed by the first core network function 5200 in any of the above methods (for example, step S2102, step S2104, step S2110, step S2112, step S2115, but not limited to these), which will not be repeated here.

[0547] In some embodiments, the above-mentioned processing module 5202 is used to execute at least one of the other steps (for example, step S2105, step S2106, step S2107, step S2108, step S2109, step S2111, but not limited to these) performed by the first core network function 5200 in any of the above methods, which are not repeated here.

[0548] FIG5C is a schematic diagram of the structure of the second core network function proposed in an embodiment of the present disclosure. As shown in FIG5C , the second core network function 5300 may include: a transceiver module 5301 .

[0549] In some embodiments, the transceiver module 5301 is configured to receive second information, where the second information includes:

[0550] The third information is used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function.

[0551] In some embodiments, the above-mentioned transceiver module 5301 is used to execute at least one of the communication steps such as sending and / or receiving (for example, step S2114, step S2115, but not limited to this) performed by the second core network function 5300 in any of the above methods, which will not be repeated here.

[0552] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0553] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0554] Figure 6A is a schematic diagram of the structure of a communication device 6100 proposed in an embodiment of the present disclosure. Communication device 6100 may be a chip, chip system, or processor that implements any of the above methods, such as a mobile access network, a first core network function, or a second core network function. Communication device 6100 may be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0555] As shown in Figure 6A, the communication device 6100 includes one or more processors 6101. The processor 6101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal devices, terminal device chips, DU or CU, core network functions, mobile access networks with wireless backhaul functions, etc.), execute programs, and process program data. Optionally, the communication device 6100 is used to perform any of the above methods. Optionally, one or more processors 6101 are used to call instructions to enable the communication device 6100 to perform any of the above methods.

[0556] In some embodiments, the communication device 6100 further includes one or more transceivers 6102. When the communication device 6100 includes one or more transceivers 6102, the transceiver 6102 performs at least one of the communication steps (e.g., steps S2101, S2102, S2104, S2110, S2112, S2114, and S2115, but not limited thereto) of transmitting and / or receiving in the above method, and the processor 6101 performs at least one of the other steps (e.g., steps S2103, S2105, S2106, S2107, S2108, S2109, and S2111, but not limited thereto). In alternative embodiments, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, terms such as transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface can be replaced with each other, terms such as transmitter, transmitting unit, transmitter, and transmitting circuit can be replaced with each other, and terms such as receiver, receiving unit, receiver, and receiving circuit can be replaced with each other.

[0557] In some embodiments, the communication device 6100 further includes one or more memories 6103 for storing data. Alternatively, all or part of the memories 6103 may be located outside the communication device 6100. In alternative embodiments, the communication device 6100 may include one or more interface circuits 6104. Optionally, the interface circuits 6104 are connected to the memory 6102 and may be configured to receive data from the memory 6102 or other devices, or to send data to the memory 6102 or other devices. For example, the interface circuits 6104 may read data stored in the memory 6102 and send the data to the processor 6101.

[0558] The communication device 6100 described in the above embodiment may be a network device, but the scope of the communication device 6100 described in the present disclosure is not limited thereto, and the structure of the communication device 6100 may not be limited to FIG. 6A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0559] 6B is a schematic diagram of the structure of a chip 6200 according to an embodiment of the present disclosure. If the communication device 6100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 6200 shown in FIG6B , but the present disclosure is not limited thereto.

[0560] The chip 6200 includes one or more processors 6201. The chip 6200 is configured to execute any of the above methods.

[0561] In some embodiments, chip 6200 further includes one or more interface circuits 6202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 6200 further includes one or more memories 6203 for storing data. Alternatively, all or part of memory 6203 may be located external to chip 6200. Optionally, interface circuit 6202 is connected to memory 6203 and may be used to receive data from memory 6203 or other devices, or may be used to send data to memory 6203 or other devices. For example, interface circuit 6202 may read data stored in memory 6203 and send the data to processor 6201.

[0562] In some embodiments, the interface circuit 6202 performs at least one of the communication steps (e.g., steps S2101, S2102, S2104, S2110, S2112, S2114, and S2115) of the aforementioned method. The interface circuit 6202 performing the communication steps (e.g., steps S2101, S2102, S2104, S2110, S2112, S2114, and S2115) of the aforementioned method, for example, means that the interface circuit 6202 performs data exchange between the processor 6201, the chip 6200, the memory 6203, or the transceiver device. In some embodiments, the processor 6201 performs at least one of the other steps (e.g., steps S2103, S2105, S2106, S2107, S2108, S2109, and S2111, but not limited thereto).

[0563] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0564] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 6100, the communication device 6100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0565] The present disclosure also provides a program product, which, when executed by the communication device 6100, enables the communication device 6100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0566] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0567] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0568] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A communication method, characterized in that: The method is performed by a mobile access network having a wireless backhaul function, and includes: Determine the primary core network function; Sending second information to the first core network function, where the second information includes: The third information is used to indicate that the first terminal accesses the network through the mobile access network.

2. The method according to claim 1, characterized in that The method further comprises: First information sent by the first terminal is received, where the first information is used by the first terminal to request access to a network.

3. The method according to claim 2, characterized in that The second information also includes the payload of the first information.

4. The method according to any one of claims 1 to 3, characterized in that The determining the first core network function includes: A core network function supporting the mobile access network is determined as the first core network function.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: Triggering modification and / or establishment of a backhaul protocol data unit session, where the backhaul protocol data unit session is used to access the first core network function.

6. The method according to any one of claims 1 to 5, characterized in that The source address of the data packet encapsulating the second information is the first address of the access network function of the mobile access network, and / or the destination address of the data packet encapsulating the second information is the third address of the first core network function; The sending the second information to the first core network function includes: The data packet encapsulating the second information is sent to the first core network function via a user plane path of the backhaul protocol data unit session.

7. The method according to any one of claims 1 to 5, characterized in that The source address of the data packet encapsulating the second information is the second address of the terminal function of the mobile access network, the second address is used for the backhaul protocol data unit session to identify the terminal function of the mobile access network, and / or the destination address of the data packet encapsulating the second information is the third address of the first core network function; The sending the second information to the first core network function includes: The data packet encapsulating the second information is sent to the first core network function via a user plane path of the backhaul protocol data unit session.

8. The method according to any one of claims 1 to 7, characterized in that The third information includes at least one of the following: User location information; wherein the user location information includes at least one of the following: first location information, where the first location is a location of an access network function of the mobile access network; second location information, where the second location is the location of the terminal function of the mobile access network; Access type information; wherein the access network type information is used to indicate that the first terminal accesses the network through the mobile access network; First indication information, where the first indication information is used to indicate whether the first terminal accesses the network through the mobile access network.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: receiving fifth information sent by the first core network function; wherein the fifth information is information of a second core network function, the second core network function being a core network function re-determined by the first core network function for the first terminal, and when the first core network function determines the second core network function, considering whether the second core network function supports the mobile access network; establishing a connection with the second core network function based on the fifth information; Send the second information to the second core network function.

10. The method according to any one of claims 1 to 9, characterized in that The second information also includes: a second address, where the second address is used to return a protocol data unit session identifier to a terminal function of a mobile access network; The second address includes at least one of the following: an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network; a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network; The fully qualified domain name of the terminal function of the mobile access network; The universal public subscription identity of the terminal function of the mobile access network.

11. The method according to claim 10, characterized in that The method further comprises any of the following: receiving fourth information sent by the first core network function through a backhaul protocol data unit session based on the second address; Receive fourth information sent by the second core network function based on the second address through the return protocol data unit session.

12. A communication method, characterized in that: The method is performed by a first core network function, including: Receive second information, where the second information includes: third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function; It is determined that the second information comes from the mobile access network.

13. The method according to claim 12, characterized in that The second information also includes a payload of the first information, where the first information is used by the first terminal to request access to the network.

14. The method according to claim 12 or 13, characterized in that The determining that the second information comes from the mobile access network includes at least one of the following: The third information includes user location information, and based on the user location information, it is determined that the second information comes from the mobile access network; wherein the user location information includes at least one of the following: first location information, where the first location is a location of an access network function of the mobile access network; second location information, where the second location is the location of the terminal function of the mobile access network; The third information includes access type information, and based on the access type information, it is determined that the second information comes from the mobile access network; The third information includes first indication information. Based on the first indication information, it is determined that the second information comes from the mobile access network. The first indication information is used to indicate whether the first terminal accesses the network through the mobile access network.

15. The method according to any one of claims 12 to 14, characterized in that: The method further comprises: There is no need to redetermine the core network function for the first terminal, and the second information is initial terminal information, so a terminal context is created.

16. The method according to claim 15, characterized in that The method further comprises at least one of the following: The first core network function supports the mobile access network, and it is determined that there is no need to redetermine the core network function for the first terminal.

17. The method according to claim 15 or 16, characterized in that The method further comprises: Send sixth information to the access network function of the mobile access network; wherein the sixth information is used to indicate that the first core network function supports the mobile access network.

18. The method according to any one of claims 12 to 17, characterized in that: The method further comprises: The third information is recorded in the terminal context.

19. The method according to any one of claims 12 to 18, characterized in that: The second information also includes: a second address, where the second address is used to return a protocol data unit session identifier of a terminal function of the mobile access network; The second address includes at least one of the following: an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network; a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network; The fully qualified domain name of the terminal function of the mobile access network; The universal public subscription identity of the terminal function of the mobile access network.

20. The method according to claim 19, characterized in that The method further comprises: The second address is recorded in the terminal context.

21. The method according to claim 19 or 20, characterized in that The method further comprises: sending fourth information to the mobile access network based on the second address by backhauling a protocol data unit session; or Based on the second information, acquiring a fourth address, where the fourth address is an address used by the mobile access network and / or the backhaul protocol data unit session to identify a terminal function of the mobile access network; Based on the fourth address, fourth information is sent to the mobile access network through a backhaul protocol data unit session.

22. The method according to any one of claims 12 to 14, characterized in that The method further comprises: It is necessary to redetermine a core network function for the first terminal and determine a second core network function; Sending fifth information to the mobile access network, where the fifth information is information about the second core network function; or Send the second information to the second core network function.

23. The method according to claim 22, characterized in that When determining the second core network function, whether the second core network function supports the mobile access network is considered.

24. A communication method, characterized in that: The method is performed by a second core network function, including: Receive second information, where the second information includes: The third information is used to indicate that the first terminal accesses the network through the mobile access network; wherein the mobile access network The network has wireless backhaul capability.

25. The method according to claim 24, characterized in that The second information also includes a payload of the first information, where the first information is used by the first terminal to request access to the network.

26. The method according to claim 24 or 25, characterized in that The receiving of the second information includes any one of the following: receiving the second information sent by the mobile access network; Receive the second information sent by the first core network function; wherein the first core network function is the core network function to which the access network function of the mobile access network is connected.

27. The method according to any one of claims 24 to 26, characterized in that The method further comprises: The second information is initial terminal information, which creates a terminal context.

28. The method according to any one of claims 24 to 27, characterized in that The method further comprises: The third information is recorded in the terminal context.

29. The method according to any one of claims 24 to 28, characterized in that The third information includes at least one of the following: first location information, where the first location is a location of an access network function of the mobile access network; second location information, where the second location is the location of the terminal function of the mobile access network; Access type information; wherein the access network type information is used to indicate that the first terminal accesses the network through the mobile access network; First indication information, where the first indication information is used to indicate whether the first terminal accesses the network through the mobile access network.

30. The method according to any one of claims 24 to 29, characterized in that The second information also includes: a second address, where the second address is used to return a protocol data unit session identifier of a terminal function of the mobile access network; The second address includes at least one of the following: an Internet Protocol address, the Internet Protocol address being allocated for a return protocol data unit session of a terminal function of the mobile access network; a serving public land mobile network identifier, where the serving public land mobile network identifier is an identifier of the serving public land mobile network of the terminal function of the mobile access network; The fully qualified domain name of the terminal function of the mobile access network; The universal public subscription identity of the terminal function of the mobile access network.

31. The method according to claim 30, characterized in that The method further comprises: sending fourth information to the mobile access network based on the second address by backhauling a protocol data unit session; or Based on the second information, acquiring a fourth address, where the fourth address is an address used by the mobile access network and / or the backhaul protocol data unit session to identify a terminal function of the mobile access network; Based on the fourth address, fourth information is sent to the mobile access network through a backhaul protocol data unit session.

32. A mobile access network, characterized in that: The mobile access network has a wireless backhaul function, including: a processing module configured to determine a first core network function; The transceiver module is configured to send second information to the first core network function, where the second information includes: The third information is used to indicate that the first terminal accesses the network through the mobile access network.

33. A first core network function, characterized in that: include: The transceiver module is configured to receive second information, where the second information includes: third information, the third information being used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function; The processing module is configured to determine that the second information comes from the mobile access network.

34. A second core network function, characterized in that: include: The transceiver module is configured to receive second information, where the second information includes: The third information is used to indicate that the first terminal accesses the network through a mobile access network; wherein the mobile access network has a wireless backhaul function.

35. A mobile access network with wireless access backhaul, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 1 to 11.

36. A first core network function, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 12 to 23.

37. A second core network function, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 24 to 31.

38. A communication system, characterized in that: include: first terminal; A mobile access network with wireless access backhaul, wherein the mobile access network with wireless access backhaul is configured to implement the communication method according to any one of claims 1 to 11; A first core network function, wherein the first core network function is configured to implement the communication method according to any one of claims 12 to 23; The second core network function is configured to implement the communication method according to any one of claims 24 to 31.

39. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is caused to execute the communication method according to any one of claims 1-11, 12-23 or 24-31.

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