Communication method and device, and storage medium

Abstract

The invention provides a communication method and device, and a storage medium, and the method comprises the steps: responding to the triggering of the building, modification or selection of a first PDU session, and determining the traffic mapping information, the traffic mapping information being used for indicating the traffic mapping relation between the first PDU session information and the second PDU session information; and transmitting the uplink data and / or the downlink data based on the flow mapping information. According to the method and the device, when the terminal is accessed through the WAB equipment, the reliability of uplink and downlink transmission can be ensured, and the availability and the reliability of the WAB are improved.

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] Currently, mobile access network equipment that supports Wireless Access Backhaul (WAB) can provide 5G network access for terminals, that is, it can provide a New Radio access link to the terminal, and the terminal can connect to the core network through the mobile access network equipment that supports WAB.

[0003] This type of mobile access network equipment 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] To improve the availability of WAB, 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 being performed by a wireless access backhaul (WAB) device, the method comprising:

[0007] In response to triggering establishment, modification, or selection of a first packet data unit (PDU) session, determining traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device, and the second PDU session is a PDU session established between a terminal and a second core network device, and wherein the terminal accesses an access network portion of the WAB device;

[0008] Based on the traffic mapping information, uplink data and / or downlink data are mapped and transmitted, wherein the uplink data is data that is received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data that is received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

[0009] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, the method being performed by an access network device, the method comprising:

[0010] Receiving a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, where the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device;

[0011] A third message is sent to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0012] According to a third aspect of an embodiment of the present disclosure, a communication method is provided, where the method is performed by a first core network device, and the method includes:

[0013] A second message is sent to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, and the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

[0014] According to a fourth aspect of an embodiment of the present disclosure, a communication method is provided, where the method is performed by a second core network device, and the method includes:

[0015] Receive a fourth message sent by a wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of a first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device.

[0016] According to a fifth aspect of an embodiment of the present disclosure, a wireless access backhaul (WAB) device is provided, including:

[0017] a processing module configured to, in response to triggering establishment, modification, or selection of a first packet data unit (PDU) session, determine traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device, the second PDU session is a PDU session established between a terminal and a second core network device, and wherein the terminal accesses an access network portion of the WAB device;

[0018] The transceiver module is configured to map and transmit uplink data and / or downlink data based on the traffic mapping information, wherein the uplink data is data that is received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data that is received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

[0019] According to a sixth aspect of an embodiment of the present disclosure, an access network device is provided, including:

[0020] A transceiver module is configured to receive a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device;

[0021] The transceiver module is further configured to send a third message to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0022] According to a seventh aspect of an embodiment of the present disclosure, a first core network device is provided, including:

[0023] The transceiver module is configured to send a second message to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, wherein the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

[0024] According to an eighth aspect of an embodiment of the present disclosure, a second core network device is provided, including:

[0025] The transceiver module is configured to receive a fourth message sent by the wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of the first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device.

[0026] According to a ninth aspect of an embodiment of the present disclosure, a wireless access backhaul (WAB) device is provided, including:

[0027] one or more processors;

[0028] The processor is configured to execute the communication method according to any one of the first aspects.

[0029] According to a tenth aspect of an embodiment of the present disclosure, an access network device is provided, including:

[0030] one or more processors;

[0031] The processor is used to execute the communication method described in any one of the second aspects.

[0032] According to an eleventh aspect of an embodiment of the present disclosure, a core network device is provided, including:

[0033] one or more processors;

[0034] The processor is used to execute the communication method described in any one of the third aspect or the fourth aspect.

[0035] According to a twelfth aspect of an embodiment of the present disclosure, there is provided a communication system, including:

[0036] A wireless access backhaul (WAB) device, wherein the WAB device is configured to implement the communication method according to any one of the first aspects;

[0037] An access network device, the access network device being configured to implement the communication method according to any one of the second aspects;

[0038] A first core network device, wherein the first core network device is configured to implement the communication method according to any one of the third aspects;

[0039] The second core network device is configured to implement the communication method described in the fourth aspect.

[0040] According to the thirteenth 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 a communication method as described in any one of the first aspect, the second aspect, the third aspect or the fourth aspect.

[0041] In the embodiments of the present disclosure, when a terminal accesses through a WAB device, the reliability of uplink and downlink transmission can be ensured, thereby improving the availability and reliability of the WAB.

[0042] 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

[0043] 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.

[0044] FIG1A is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0045] FIG1B is an exemplary schematic diagram of an IAB architecture provided according to an embodiment of the present disclosure.

[0046] FIG1C is an exemplary schematic diagram of a connection scenario of a WAB device provided according to an embodiment of the present disclosure.

[0047] FIG1D is a schematic diagram illustrating an exemplary scenario of a PDU session according to an embodiment of the present disclosure.

[0048] FIG2 is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0049] FIG3A is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0050] FIG3B is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0051] FIG3C is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0052] FIG3D is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0053] FIG4 is a schematic diagram of an exemplary interaction of a communication method provided according to an embodiment of the present disclosure.

[0054] FIG5A is an exemplary block diagram of a WAB device according to an embodiment of the present disclosure.

[0055] FIG5B is an exemplary block diagram of an access network device provided according to an embodiment of the present disclosure.

[0056] FIG5C is an exemplary block diagram of a first core network device provided according to an embodiment of the present disclosure.

[0057] Figure 5D is an exemplary block diagram of a second core network device provided according to an embodiment of the present disclosure.

[0058] FIG6A is a schematic diagram of an exemplary interaction of a communication device according to an embodiment of the present disclosure.

[0059] FIG6B is an exemplary interaction diagram of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0060] 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.

[0061] The embodiments of the present disclosure provide a communication method, a device, and a storage medium.

[0062] In a first aspect, an embodiment of the present disclosure provides a communication method, which is performed by a wireless access backhaul (WAB) device. The method includes:

[0063] In response to triggering establishment, modification, or selection of a first packet data unit (PDU) session, determining traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device, and the second PDU session is a PDU session established between a terminal and a second core network device, and wherein the terminal accesses an access network portion of the WAB device;

[0064] Based on the traffic mapping information, uplink data and / or downlink data are transmitted, wherein the uplink data is data that is received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data that is received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

[0065] In the above embodiment, the WAB device can determine the traffic mapping information when the establishment, modification, or selection of the first PDU session is triggered, and transmit the uplink and downlink data based on the traffic mapping information. The present disclosure can ensure the reliability of uplink and downlink transmission when the terminal accesses through the WAB device, thereby improving the availability and reliability of the WAB.

[0066] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following:

[0067] In response to establishing the second PDU session, determining to trigger establishment of the first PDU session;

[0068] In response to modifying the second PDU session, determining to trigger modification of the first PDU session;

[0069] In response to the second PDU session being established, determining triggers selection of the established first PDU session.

[0070] In the above embodiment, when the second PDU session, that is, the PDU session corresponding to the terminal, is established or modified, it can be determined that the establishment, modification or selection of the first PDU session is triggered, thereby ensuring the establishment or modification of the terminal PDU session and improving the availability and reliability of WAB.

[0071] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0072] A first message is sent to the first core network device, where the first message is used to request the first core network device to establish or modify the first PDU session for the terminal part of the WAB device, and the first message includes the second PDU session information.

[0073] In the above embodiment, the WAB device may send a first message to the first core network device, requesting the first core network device to establish or modify a first PDU session for the WAB-MT, thereby improving the availability and reliability of the WAB.

[0074] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0075] Receive a second message sent by the first core network device, where the second message includes the traffic mapping information.

[0076] In the above embodiment, the WAB device can receive the second message sent by the first core network device, which may include traffic mapping information, thereby ensuring that the WAB device can obtain the traffic mapping information and having high availability.

[0077] In conjunction with some embodiments of the first aspect, in some embodiments, the traffic mapping information includes one or more traffic mapping items, wherein each of the traffic mapping items includes at least one of the following:

[0078] Traffic mapping index;

[0079] The second PDU session information corresponding to the traffic;

[0080] The first PDU session information corresponding to the traffic.

[0081] In the above embodiment, the traffic mapping information may include but is not limited to at least one of the above items, so that the WAB device can determine the traffic mapping relationship between the first PDU session information and the second PDU session information, which is simple to implement and has high availability.

[0082] In conjunction with some embodiments of the first aspect, in some embodiments, the second PDU session information includes at least one of the following:

[0083] Terminal identification;

[0084] Second PDU session identifier;

[0085] Second core network device identifier;

[0086] Uplink transport layer information of the second PDU session;

[0087] Terminal policy information;

[0088] Second quality of service flow QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

[0089] In the above embodiment, the second PDU session information may include but is not limited to at least one of the above items, thereby providing information related to the PDU session of the terminal with high availability.

[0090] In conjunction with some embodiments of the first aspect, in some embodiments, the first PDU session information includes at least one of the following:

[0091] First PDU session identifier;

[0092] First QoS flow identifier;

[0093] The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

[0094] In the above embodiment, the first PDU session information may include but is not limited to at least one of the above items, thereby providing information related to the backhaul PDU session with high availability.

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

[0096] receiving a third message sent by the service access network device of the WAB device, where the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session;

[0097] A fourth message is sent to the second core network device, where the fourth message includes downlink transport layer information of the first PDU session.

[0098] In the above embodiment, the WAB device can obtain a third message from the service access network device, which may include but is not limited to traffic mapping information and / or downlink transport layer information of the first PDU session. Furthermore, the WAB device can send a fourth message to the second core network device to provide the downlink transport layer information of the first PDU session to the second core network device for subsequent downlink data transmission.

[0099] In conjunction with some embodiments of the first aspect, in some embodiments, transmitting uplink data based on the traffic mapping information includes:

[0100] After receiving the uplink data sent by the terminal, the access network part of the WAB device determines the second PDU session information corresponding to the uplink data;

[0101] Determine, based on the traffic mapping information, a first DRB to which the second PDU session information is mapped, where the first DRB is a DRB transmitted between a terminal part of the WAB device and a service access network device of the WAB device;

[0102] The uplink data is sent from the terminal part of the WAB device to the service access network device of the WAB device through the first DRB.

[0103] In the above embodiment, the WAB device can transmit uplink data from the terminal based on the traffic mapping information, thereby ensuring the reliability of uplink transmission and improving the availability and reliability of the WAB.

[0104] In conjunction with some embodiments of the first aspect, in some embodiments, mapping and transmitting downlink data based on the traffic mapping information includes:

[0105] After receiving the downlink data sent by the second core network device, the terminal part of the WAB device determines the first PDU session information corresponding to the downlink data;

[0106] Determine, based on the traffic mapping information, a second DRB to which the first PDU session information is mapped, where the second DRB is a DRB transmitted between the terminal and an access network portion of the WAB device;

[0107] The access network part of the WAB device sends the downlink data to the terminal through the second DRB.

[0108] In the above embodiment, the WAB device can transmit downlink data to the terminal based on the traffic mapping information, thereby ensuring the reliability of downlink transmission and improving the availability and reliability of the WAB.

[0109] In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by an access network device and includes:

[0110] Receiving a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, where the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device;

[0111] A third message is sent to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0112] In the above embodiment, the access network device can receive the fifth message sent by the first core network device, which may include traffic mapping information, so that the access network device can subsequently transmit uplink and downlink data based on the traffic mapping information. Furthermore, the access network device can provide the traffic mapping information and / or the downlink transport layer information of the first PDU session to the WAB device, ensuring the reliability of uplink and downlink transmission when the terminal accesses through the WAB device, thereby improving the availability and reliability of the WAB.

[0113] In conjunction with some embodiments of the second aspect, in some embodiments, the traffic mapping information includes one or more traffic mapping items, wherein each of the traffic mapping items includes at least one of the following:

[0114] Traffic mapping index;

[0115] The second PDU session information corresponding to the traffic;

[0116] The first PDU session information corresponding to the traffic.

[0117] In conjunction with some embodiments of the second aspect, in some embodiments, the second PDU session information includes at least one of the following:

[0118] Terminal identification;

[0119] Second PDU session identifier;

[0120] Second core network device identifier;

[0121] Uplink transport layer information of the second PDU session;

[0122] Terminal policy information;

[0123] Second quality of service flow QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

[0124] In conjunction with some embodiments of the second aspect, in some embodiments, the first PDU session information includes at least one of the following:

[0125] First PDU session identifier;

[0126] First QoS flow identifier;

[0127] The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

[0128] In a third aspect, an embodiment of the present disclosure provides a communication method, which is performed by a first core network device and includes:

[0129] A second message is sent to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, and the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

[0130] In the above embodiment, the first core network device can receive the second message sent by the WAB device, which may include traffic mapping information, so that the first core network device can perform uplink and downlink data transmission based on the traffic mapping information. When the terminal accesses through the WAB device, the reliability of uplink and downlink transmission is ensured, thereby improving the availability and reliability of the WAB.

[0131] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0132] A first message sent by the WAB device is received, where the first message is used to request the first core network device to establish or modify the first PDU session for the terminal part of the WAB device.

[0133] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0134] Sending a fifth message to the access network device to which the WAB device is connected, wherein the fifth message includes the traffic mapping information;

[0135] A sixth message sent by the access network device is received, where the sixth message is used to respond to the fifth message.

[0136] In conjunction with some embodiments of the third aspect, in some embodiments, the traffic mapping information includes one or more traffic mapping items, wherein each of the traffic mapping items includes at least one of the following:

[0137] Traffic mapping index;

[0138] The second PDU session information corresponding to the traffic;

[0139] The first PDU session information corresponding to the traffic.

[0140] In conjunction with some embodiments of the third aspect, in some embodiments, the second PDU session information includes at least one of the following:

[0141] Terminal identification;

[0142] Second PDU session identifier;

[0143] Second core network device identifier;

[0144] Uplink transport layer information of the second PDU session;

[0145] Terminal policy information;

[0146] Second quality of service flow QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

[0147] In conjunction with some embodiments of the third aspect, in some embodiments, the first PDU session information includes at least one of the following:

[0148] First PDU session identifier;

[0149] First QoS flow identifier;

[0150] The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

[0151] In a fourth aspect, an embodiment of the present disclosure provides a communication method, which is performed by a second core network device and includes:

[0152] Receive a fourth message sent by a wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of a first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device.

[0153] In a fifth aspect, an embodiment of the present disclosure provides a wireless access backhaul (WAB) device, including:

[0154] a processing module configured to, in response to triggering establishment, modification, or selection of a first packet data unit (PDU) session, determine traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device, the second PDU session is a PDU session established between a terminal and a second core network device, and wherein the terminal accesses an access network portion of the WAB device;

[0155] The transceiver module is configured to transmit uplink data and / or downlink data based on the traffic mapping information, wherein the uplink data is data that is received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data that is received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

[0156] In a sixth aspect, an embodiment of the present disclosure provides an access network device, including:

[0157] A transceiver module is configured to receive a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device;

[0158] The transceiver module is further configured to send a third message to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0159] In a seventh aspect, an embodiment of the present disclosure provides a first core network device, including:

[0160] The transceiver module is configured to send a second message to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, wherein the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

[0161] In an eighth aspect, an embodiment of the present disclosure provides a second core network device, including:

[0162] The transceiver module is configured to receive a fourth message sent by the wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of the first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device.

[0163] In a ninth aspect, an embodiment of the present disclosure provides a wireless access backhaul (WAB) device, including:

[0164] one or more processors;

[0165] The processor is configured to execute the communication method according to any one of the first aspects.

[0166] In a tenth aspect, an embodiment of the present disclosure provides an access network device, including:

[0167] one or more processors;

[0168] The processor is used to execute the communication method described in any one of the second aspects.

[0169] In an eleventh aspect, an embodiment of the present disclosure provides a core network device, including:

[0170] one or more processors;

[0171] The processor is used to execute the communication method described in any one of the third aspect or the fourth aspect.

[0172] In a twelfth aspect, an embodiment of the present disclosure provides a communication system, including:

[0173] A wireless access backhaul (WAB) device, wherein the WAB device is configured to implement the communication method according to any one of the first aspects;

[0174] An access network device, the access network device being configured to implement the communication method according to any one of the second aspects;

[0175] A first core network device, wherein the first core network device is configured to implement the communication method according to any one of the third aspects;

[0176] The second core network device is configured to implement the communication method described in the fourth aspect.

[0177] In the thirteenth 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, the third aspect or the fourth aspect.

[0178] It is understandable that the aforementioned WAB device, access network device, first core network device, second core network device, communication system, and storage medium are all used to execute 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.

[0179] In some embodiments, the terms communication method, bearer establishment method, and data transmission method are interchangeable, and the terms communication system, bearer establishment system, and data transmission system are interchangeable.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0185] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0186] 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.

[0187] 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 also applicable when there are more branches such as A, B, C, etc.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0193] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0194] 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.

[0195] FIG1A is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0196] As shown in FIG1A , a communication system 100 includes a WAB device 101 , an access network device 102 , a first core network device 103 - 1 , a second core network device 103 - 2 , and a terminal 104 .

[0197] In some embodiments, the WAB device 101, also known as a WAB node, can support more mobility scenarios, such as being deployed on a moving vehicle. The WAB device 101 may include a gNB (i.e., the entire base station), some core network functions (e.g., user plane functions (UPFs)), a local data network, and a terminal component (i.e., the WAB-MT).

[0198] In some embodiments, the access network device 102 may refer to a service access network device of a WAB device, for example, a node or device that connects the WAB-MT to the core network. The access network device may include an integrated access backhaul base station (IAB-donor), evolved NodeB (eNB), next generation evolved NodeB (ng-eNB), next generation NodeB (gNB), node B (NB), home node B (HNB), home evolved nodeB (HeNB), wireless backhaul equipment, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in 6G communication system, open base station (Open RAN), cloud base station (Cloud RAN), base station in other communication systems, and at least one of access nodes in Wi-Fi system, but is not limited thereto.

[0199] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between access network nodes or within access network nodes involved in the embodiments of the present disclosure can be transformed into internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0200] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0201] In some embodiments, the first core network device 103-1 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).

[0202] In some embodiments, the first core network device 103-1 in the present disclosure may include multiple network elements, such as an access and mobility management function (AMF), a session management function (SMF), etc.

[0203] In some embodiments, the second core network device 103-2 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).

[0204] In some embodiments, the second core network device 103-2 in the present disclosure may include multiple network elements, such as AMF, SMF, user plane function (UPF), etc.

[0205] 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).

[0206] In the embodiments of the present disclosure, integrated access and backhaul (IAB) is first introduced.

[0207] IAB supports millimeter wave base stations for wireless access and backhaul, effectively reducing the need for new fiber deployment when deploying dense networks and enabling wireless relay in the Next Generation Radio Access Network (NG-RAN). The relay node is called an IAB-node and supports wireless access and backhaul via NR. The terminating node for NR backhaul on the network side is called an IAB-donor, a gNB with IAB functionality added. Backhaul can be performed via a single hop or multiple hops. The IAB architecture is shown in Figure 1B.

[0208] NG-RAN supports IAB by wirelessly connecting an IAB-node to a gNB capable of serving the IAB-node (called an IAB-donor). An IAB-donor may include an IAB-donor-CU and one or more IAB-donor-DUs. When the gNB-CU control plane (gNB-CU-CP) and gNB-CU user plane (gNB-CU-UP) are separated, the IAB-donor node may include an IAB-donor-CU-CP, multiple IAB-donor-CU-UPs, and multiple IAB-donor-DUs. The IAB-node can connect to an upstream IAB node (IAB-node) or IAB-donor-DU via a subset of terminal equipment functions of the fifth-generation mobile communication radio (New Radio User Plane Interface, NR Uu) interface (called the IAB-MT function in the IAB-node). The IAB-node provides wireless backhaul to downstream IAB-nodes and terminal devices through the network function of the NR Uu interface (called the IAB-DU function of the IAB-node).

[0209] The control plane (F1-C) traffic of the F1 interface between the IAB-node and the IAB-donor-CU is backhauled via the IAB-donor-DU and an optional intermediate IAB-node. The F1-U traffic between the IAB-node and the IAB-donor-CU is backhauled via the IAB-donor-DU and an optional intermediate IAB-node.

[0210] Currently, WAB has been proposed based on IAB. The following is an introduction to WAB.

[0211] WABs are also called VMRs (vehicle-mounted relays) because they can be deployed on mobile vehicles such as cars, buses, and airplanes to support a wider range of deployment scenarios, such as local service access and local communications. The WAB architecture can be shown in Figure 1C . The WAB includes the gNB (i.e., the entire base station), the UPF (i.e., part of the core network functions), the local data network, and the WAB-MT (i.e., the UE portion).

[0212] When a terminal accesses the network via a WAB, it must establish a packet data unit (PDU) session for the terminal to conduct business. This PDU session requires a backhaul (BH) PDU session, as shown in red in Figure 1D. The BH PDU session is initiated by the terminal portion of the WAB device (i.e., the WAB-MT). Clearly, the terminal PDU session relies on the BH PDU session.

[0213] In order to support the establishment of corresponding bearers when a terminal accesses via WAB to ensure uplink and downlink data transmission, the present disclosure provides the following communication method, device, and storage medium.

[0214] 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:

[0215] Step S2101: The WAB device 101 sends a first message to the first core network device 103-1.

[0216] In some embodiments, the first message may be used to request the first core network device 103 - 1 to establish or modify a first PDU session for the terminal part (WAB-MT) of the WAB device.

[0217] In some embodiments, the WAB device 101 sends the first message to the first core network device 103 - 1 in response to triggering the establishment or modification of the first PDU session.

[0218] In an example, the first PDU session is a PDU session established between the WAB device 101 and the first core network device 103 - 1 .

[0219] Exemplarily, the name of the first PDU session is not limited and can be interchanged with the backhaul session, backhaul PDU session, etc., and this disclosure does not limit this.

[0220] In one example, the first core network device 103 - 1 may include but is not limited to an AMF selected for the terminal part (WAB-MT) of the WAB device 101 .

[0221] In one example, the first core network device 103-1 may include, but is not limited to, an SMF selected for the first PDU session of the terminal part (WAB-MT) of the WAB device 101. In the embodiment of the present disclosure, considering that the terminal PDU session needs to rely on the backhaul PDU session (i.e., the first PDU session), the establishment or modification of the first PDU session may be triggered when the terminal PDU session is established or modified.

[0222] In the embodiment of the present disclosure, considering that the terminal PDU session needs to rely on the return PDU session (i.e., the first PDU session), when the terminal PDU session is established or modified, the established first PDU session can also be selected for transmission, wherein the WAB device can select a suitable first PDU session and the terminal PDU session for mapping according to the quality of service (QoS) requirements of the terminal PDU session.

[0223] The terminal PDU session may be referred to as a second PDU session, and the second PDU session is a PDU session established between the terminal 104 and the second core network device 103-2. The terminal 104 may access the access network portion (WAB-gNB) of the WAB device.

[0224] Exemplarily, the second core network device 103-2 may include but is not limited to the AMF selected by the terminal 104.

[0225] Exemplarily, the second core network device 103-2 may include but is not limited to an access network device, such as the access network part (WAB-gNB) of the WAB device, and the AMF selected by the terminal 104.

[0226] Exemplarily, the second core network device 103-2 may include but is not limited to at least one of the SMF and UPF selected by the terminal 104 for the second PDU session.

[0227] Exemplarily, the name of the second PDU session is not limited.

[0228] In one example, when the WAB device 101 determines to establish a second PDU session, it determines to select the established first PDU session. That is, it determines to trigger the selection of the established first PDU session. At this point, the traffic mapping relationship between the first PDU session information and the second PDU session information can be determined based on the internal implementation of the WAB device, for example, based on the QoS requirements of the second PDU and the QoS supported by the established first PDU session.

[0229] In one example, when the WAB device 101 determines to establish the second PDU session, it determines that the establishment of the first PDU session is triggered. This can be based on the internal implementation of the WAB device. For example, the access network part (WAB-gNB) of the WAB device notifies the terminal part (WAB-MT) of the WAB device, and the terminal part (WAB-MT) of the WAB device sends a first message to the first core network device 103-1, requesting the first core network device 103 to establish the first PDU session for the terminal part (WAB-MT) of the WAB device.

[0230] In one example, when the WAB device 101 determines to modify the second PDU session, it can be determined that the modification of the first PDU session is triggered. In this case, based on the internal implementation of the WAB device, for example, the access network part (WAB-gNB) of the WAB device notifies the terminal part (WAB-MT) of the WAB device, and the terminal part of the WAB device sends a first message to the first core network device 103-1, requesting the first core network device 103-1 to modify the first PDU session for the terminal part (WAB-MT) of the WAB device.

[0231] In some embodiments, the first message may be a PDU session establishment request message or a PDU session modification request message, requesting the first core network device 103-1 to establish or modify the first PDU session for the terminal part (WAB-MT) of the WAB device.

[0232] In one example, the first message can be used to request the first core network device 103-1, such as the AMF, to allocate or modify resources on the Uu and NG-U interfaces for one or more first PDU sessions and a first quality of service flow (QoS flow), and to establish a corresponding data radio bearer (DRB) for the terminal part (WAB-MT) of the WAB device, where the DRB can be a first DRB. It can be understood that the first DRB is a DRB transmitted between the terminal part (WAB-MT) of the WAB device and the service access network device of the WAB device.

[0233] The first QoS flow is the QoS flow in the first PDU session.

[0234] Exemplarily, a first PDU session may include one or more first QoS flows.

[0235] In some embodiments, the first message may also be other messages, such as a PDU session resource setup request (PDU session resource setup request), which is not limited in the present disclosure.

[0236] In some embodiments, the first message may include, but is not limited to, the second PDU session information. The WAB device 101 notifies the first core network device 103-1 of the second PDU session information through the first message, so that the first core network device 103-1 can interact with the second core network device 103-2 to complete the establishment or modification of the first PDU session.

[0237] In one example, the second PDU session information refers to information about the second PDU session, and in the embodiment of the present disclosure, it may be PDU session information related to the terminal 104 .

[0238] In an example, the second PDU session information may include but is not limited to at least one of the following:

[0239] Terminal identification;

[0240] Second PDU session identifier;

[0241] Second core network device identifier;

[0242] Uplink transport layer information of the second PDU session;

[0243] Terminal policy information;

[0244] Second QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

[0245] The terminal identifier may be used to indicate the terminal to which the first message is directed. The terminal identifier may be a globally unique temporary terminal identifier (Globally Unique Temporary UE Identity, GUTI) or other identifier, which is not limited in the present disclosure.

[0246] The number of the second PDU session identifiers may be one or more, that is, the first message may include identifiers corresponding to one or more second PDU sessions.

[0247] For example, the second PDU session identifier can be a PDU session ID, or it can be an identifier used to indicate a specific PDU, such as the Internet Protocol (IP) address information and / or tunnel endpoint identifier TEID (Tunnel Endpoint Identifier) ​​used by the second PDU session. This disclosure does not limit this.

[0248] Among them, the second core network device identifier can be used to indicate the core network device selected by the terminal 104 for the second PDU session, such as SMF, UPF, etc.

[0249] Exemplarily, the second core network device identifier may include but is not limited to: an SMF identifier selected for the second PDU session of terminal 104; and a UPF identifier selected for the second PDU session of terminal 104.

[0250] Among them, the policy information of the second PDU includes but is not limited to at least one of the following items: network slice information corresponding to the PDU; terminal aggregate maximum bit rate (Aggregate Maximum Bit Rate, AMBR).

[0251] The second QoS flow is the QoS flow in the second PDU session, and one second PDU session may include one or more second QoS flows.

[0252] The second QoS flow information may include but is not limited to a second QoS flow identifier and corresponding QoS parameters.

[0253] Exemplarily, the QoS parameter may include but is not limited to at least one of the following:

[0254] 5G QoS Identifier (5QI);

[0255] Priority Level (PL);

[0256] Packet Delay Budget (PDB);

[0257] Packet Error Rate (PER);

[0258] Guaranteed Bit Rate (GBR);

[0259] Maximum Bit Rate (MBR);

[0260] Allocation and Retention Priority (ARP).

[0261] The above description is merely an exemplary description. The second PDU session information may also include other information, which is not limited in the present disclosure.

[0262] Step S2102 : The first core network device 103 - 1 sends a second message to the WAB device 101 .

[0263] In some embodiments, the first core network device 103-1, such as the AMF, selects an SMF for the WAB-MT based on the first message, and the selected SMF performs establishment or modification of the first PDU session.

[0264] In some embodiments, after the first PDU session is established or modified, the first core network device 103-1, such as the AMF, may send a second message to the WAB device 101, which may include the traffic mapping information. The terminal part (WAB-MT) of the WAB device may receive the second message.

[0265] In some embodiments, the second message may be a PDU session establishment accept message or a PDU session modification accept message.

[0266] Of course, the second message may also be other messages, and this disclosure does not limit this.

[0267] In some embodiments, the traffic mapping information may be used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information.

[0268] In an example, the content included in the second PDU session information has been introduced in the above embodiment and will not be repeated here.

[0269] In one example, the first PDU session information refers to information of the first PDU session, and in the embodiment of the present disclosure, it may be PDU session information related to backhaul.

[0270] In an example, the first PDU session information may include but is not limited to at least one of the following:

[0271] First PDU session identifier;

[0272] First QoS flow identifier;

[0273] The first DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

[0274] The number of the first PDU session identifiers may be one or more, which is not limited in the present disclosure.

[0275] The number of the first QoS flow identifiers may be one or more, which is not limited in this disclosure.

[0276] For example, the first PDU session identifier can be a PDU session ID, or it can be an identifier used to indicate a specific PDU, such as the IP address information or tunnel endpoint identifier TEID (Tunnel Endpoint Identifier) ​​used by the first PDU session, which is not limited in this disclosure.

[0277] In one example, the traffic mapping information may include one or more traffic mapping items. In the disclosed embodiments, traffic may refer to data traffic in a network, which may be transmitted via a "bearer" provided by the network. This bearer may be a PDU session, a QoS flow, and / or a DRB. Traffic may include, but is not limited to, uplink data and / or downlink data of terminal 104.

[0278] For example, each traffic mapping item may include, but is not limited to, at least one of the following:

[0279] Traffic mapping index;

[0280] Second PDU session information corresponding to the traffic;

[0281] The first PDU session information corresponding to the traffic;

[0282] In one example, the traffic mapping index can be used to indicate the mapping relationship between (one or more) second PDU session identifiers, (one or more) second QoS flow identifiers and (one or more) first PDU session identifiers, (one or more) first QoS flow identifiers.

[0283] Exemplarily, the traffic mapping index may be 1, which indicates that the second PDU session identifier is 1, the second QoS flow identifier is 1, the first PDU session identifier is 1, and the first QoS flow identifier is 2.

[0284] That is, when the traffic mapping index is 1, it indicates the mapping relationship between the second PDU session #1, the second QoS flow #1 and the first PDU session #1, the first QoS flow #2.

[0285] Among them, if the terminal 104 has traffic transmitted through the second PDU session#1 and the second QoS flow#1, the WAB device 101 will map the corresponding traffic to the first PDU session#1 and QoS flow#2 in the BH, that is, the traffic is transmitted through the first PDU session#1 and QoS flow#2, or the traffic is transmitted through the first DRB corresponding to the first PDU session#1 and QoS flow#2.

[0286] In some embodiments, one or more second PDU sessions may be mapped into one first PDU session.

[0287] In some embodiments, multiple second QoS flows in a second PDU session can be mapped to one or more first QoS flows in a first PDU session.

[0288] The above description is merely an example. The second PDU session and the first PDU session may be mapped one-to-one, one-to-many, or many-to-one. Furthermore, the second QoS flow and the first QoS flow may be mapped one-to-one, one-to-many, or many-to-one. This disclosure does not limit this.

[0289] In some embodiments, the WAB device 101 receives the second message, thereby determining the traffic mapping information.

[0290] Step S2103a : The first core network device 103 - 1 sends a fifth message to the service access network device 102 of the WAB device 101 .

[0291] In some embodiments, the fifth message may be a PDU session resource establishment request message.

[0292] In some embodiments, the fifth message may include the traffic mapping information. The specific content of the traffic mapping information has been introduced in the above embodiments and will not be repeated here.

[0293] In some embodiments, the access network device 102 receives the fifth message. Further, the access network device 102 stores the traffic mapping information to transmit uplink and downlink data of the terminal.

[0294] Step S2103b: The access network device 102 of the WAB device 101 sends a third message to the WAB device 101.

[0295] The access network device 102 is a serving access network device of the WAB device 101 .

[0296] In some embodiments, the third message may include the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0297] In some embodiments, the third message may be a radio resource control reconfiguration (RRC reconfiguration) message.

[0298] In some embodiments, the terminal part (WAB-MT) of the WAB device 101 receives the third message.

[0299] In some embodiments, when the third message may include the traffic mapping information, the WAB device 101 may determine the traffic mapping information based on the third message.

[0300] In some embodiments, when the third message may include downlink transport layer information of the first PDU session, the WAB device 101 may determine the downlink transport layer information related to the first PDU session based on the third message, thereby performing downlink data transmission between the WAB device 101 and the access network device 102.

[0301] Step S2104: The access network device 102 sends a sixth message to the first core network device 103-1.

[0302] In some embodiments, the sixth message is used to respond to the fifth message. The response message informs the first core network device 103-1 that the access network device 102 has established corresponding resources for the terminal part of the WAB device.

[0303] In some embodiments, the sixth message may be a PDU session resource establishment response message.

[0304] Step S2105 : The WAB device 101 sends a fourth message to the second core network device 103 - 2 .

[0305] In some embodiments, the fourth message can be used to provide the downlink transport layer information of the first PDU session to the second core network device 103-2 to ensure the transmission of uplink and downlink data of the terminal.

[0306] In some embodiments, the fourth message may be a PDU session resource establishment response message, but is not limited thereto and may also be other messages.

[0307] In some embodiments, the fourth message includes downlink transport layer information of the first PDU session, wherein the downlink transport layer information is provided to the WAB device by the access network device 102 through the third message.

[0308] In some embodiments, the fourth message may be sent by the access network part (WAB-gNB) of the WAB device to the second core network device 103-2.

[0309] Step S2106 , the WAB device 101 sends an RRC reconfiguration message to the terminal 104 .

[0310] In some embodiments, the RRC reconfiguration message may be used to indicate that the first PDU session establishment or modification is successful.

[0311] In step S2107 , the WAB device 101 transmits the uplink data and / or downlink data based on the traffic mapping information.

[0312] In some embodiments, uplink data may refer to data sent by the terminal 104 to the access network part (WAB-gNB) of the WAB device, and needs to be forwarded by the terminal part (WAB-MT) of the WAB device to the second core network device 103-2.

[0313] In some embodiments, downlink data may refer to data sent by the second core network device 103-2 to the terminal part (WAB-MT) of the WAB device, and needs to be forwarded to the terminal 104 by the access network part (WAB-gNB) of the WAB device.

[0314] In some embodiments, the WAB device 101 receives traffic corresponding to the terminal 104, such as uplink and downlink data. Based on its own implementation, the WAB device 101 maps the first PDU session and the first QoS flow to be transmitted through the second PDU session and the second QoS flow, or maps the second PDU session and the second QoS flow to be transmitted through the first PDU session and the first QoS flow. The WAB device 101 can determine the traffic mapping information.

[0315] In some embodiments, the WAB device 101 receives traffic corresponding to the terminal 104, such as uplink data. Based on the traffic mapping information, the WAB device 101 maps the traffic (e.g., uplink data) received through the second PDU session and the second QoS flow (or the radio bearer corresponding to the second PDU session and QoS flow) to be transmitted through the first PDU session and the first QoS flow. In some embodiments, the WAB device 101 receives traffic corresponding to the terminal 104, such as downlink data. Based on the traffic mapping information, the WAB device 101 maps the traffic (e.g., downlink data) received from the first PDU session and the first QoS flow to be transmitted through the second PDU session and the second QoS flow (or the radio bearer corresponding to the second PDU session and QoS flow).

[0316] In some embodiments, the WAB device 101 receives a second message sent by the first core network device 103 - 1 , which includes traffic mapping information. The WAB device 101 may determine the traffic mapping information based on the second message.

[0317] In some embodiments, the WAB device 101 receives a third message sent by the service access network device 102 , which includes traffic mapping information. The WAB device 101 may determine the traffic mapping information based on the third message.

[0318] In some embodiments, the WAB device 101 determines the traffic mapping information based on a combination of two or more of the above. The present disclosure does not limit the manner in which the WAB device 101 determines the traffic mapping information.

[0319] In some embodiments, the WAB device 101 transmits uplink data and / or downlink data based on the traffic mapping information:

[0320] In one example, the terminal 104 sends uplink data to the access network part (WAB-gNB) of the WAB device 101, and the access network part (WAB-gNB) of the WAB device receives the uplink data.

[0321] Furthermore, the WAB device 101 may determine the second PDU session information corresponding to the uplink data, determine the first DRB to which the second PDU session information is mapped based on the traffic mapping information, and transmit the uplink data through the first DRB.

[0322] For example, the terminal part (WAB-MT) of the WAB device sends the uplink data to the serving access network device 102 of the WAB device 101 through the first DRB. The access network device 102 can provide the uplink data to the second core network device 103-2, such as UPF.

[0323] In one example, the second core network device 103-2, such as the UPF of the terminal 104, can send the downlink data to the terminal part (WAB-MT) of the WAB device through the service access network device 102 of the WAB device. After receiving the downlink data, the terminal part (WAB-MT) of the WAB device can determine the first PDU session information corresponding to the downlink data.

[0324] Furthermore, the WAB device 101 may determine, based on the aforementioned traffic mapping information, a second DRB to which the first PDU session information is mapped. The downlink data may be transmitted via the second DRB. For example, the access network portion (WAB-gNB) of the WAB device may transmit the downlink data to the terminal 104 via the second DRB.

[0325] The second DRB is the DRB transmitted between the terminal and the access network part (WAB-gNB) of the WAB device.

[0326] 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.

[0327] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0328] 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.

[0329] 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.

[0330] In some embodiments, the information transmission method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2107. 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, step S2104 can be implemented as an independent embodiment, steps S2103+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, step S2107 can be implemented as an independent embodiment, and steps S2101 to S2107 can be implemented as independent embodiments, but are not limited thereto.

[0331] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if terminal 104 does not access the network through a WAB device, step S2101 may not be performed. For another example, if terminal 104 accesses the network through a WAB device 101 and the establishment of a second PDU session triggers the selection of the already established first PDU session, step S2101 may not be performed.

[0332] In some embodiments, step S2102 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the first core network device 103-1 refuses to establish or refuses to modify the first PDU session, step S2102 may not be performed.

[0333] In some embodiments, steps S2103 to S2104 are optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the WAB device 101 obtains traffic mapping information and / or downlink transport layer information of the first PDU session from other execution entities, step S2103 may not be performed.

[0334] In some embodiments, step S2105 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the second core network device 103-2 obtains the fourth message from another execution entity, step S2105 may not be performed.

[0335] In some embodiments, step S2106 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, when the terminal 104 obtains the RRC reconfiguration message from another execution entity, step S2106 may not be performed.

[0336] 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 WAB device 101 transmits uplink and downlink data based on other information, step S2107 may not be performed.

[0337] In some embodiments, steps S2101 to S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0338] In some embodiments, the execution order of steps S2101 to S2107 is not limited.

[0339] In the above embodiment, when the second PDU session is established or modified, the establishment, modification or selection of the first PDU session can be triggered. The WAB device can determine the traffic mapping information through the above process, and thus transmit the uplink and downlink data of the terminal based on the traffic mapping information, thereby ensuring the reliability of the uplink and downlink transmission, and improving the availability and reliability of the WAB.

[0340] FIG3A is an interactive diagram of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3A , the present disclosure embodiment relates to an information transmission method, which can be executed by a WAB device 101. The method includes:

[0341] Step S3101, determine traffic mapping information.

[0342] In some embodiments, the optional implementation of step S3101 can refer to the optional implementation provided in step S2107 of Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0343] Step S3102: Transmit uplink data and / or downlink data.

[0344] In some embodiments, the WAB device 101 transmits uplink data and / or downlink data based on the traffic mapping information.

[0345] In some embodiments, the optional implementation of step S3102 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.

[0346] In some embodiments, steps S3101 to S3102 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0347] In some embodiments, the execution order of steps S3101 to S3102 is not limited.

[0348] In the above embodiment, the WAB device can determine the traffic mapping information, and thus transmit the uplink and downlink data of the terminal based on the traffic mapping information, thereby ensuring the reliability of the uplink and downlink transmission and improving the availability and reliability of the WAB.

[0349] FIG3B is an interactive diagram of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3B , the present disclosure embodiment relates to an information transmission method, which can be executed by the access network device 102. The method includes:

[0350] Step S3201, obtain the fifth message.

[0351] In some embodiments, the fifth message may include traffic mapping information.

[0352] In some embodiments, the access network device 102 may obtain the fifth message from the first core network device 103 - 1 , but is not limited thereto and may also receive the fifth message sent by other entities.

[0353] In some embodiments, the access network device 102 obtains a fifth message determined according to a predefined rule.

[0354] In some embodiments, the access network device 102 performs processing to obtain the fifth message.

[0355] In some embodiments, step S3201 is omitted, the access network device 102 autonomously implements the function indicated by the fifth message, or the access network device 102 obtains the fifth message based on predefined rules or protocol agreements, or the above functions are default or default.

[0356] In some embodiments, the optional implementation of step S3201 can refer to the optional implementation of step S2103a in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0357] Step S3202, sending the third message.

[0358] In some embodiments, the third message may include the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0359] In some embodiments, the access network device 102 may send a third message to the WAB device 101 .

[0360] In some embodiments, the WAB device 101 receives the third message.

[0361] In some embodiments, the optional implementation of step S3202 can refer to the optional implementation of step S2103b in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0362] In some embodiments, steps S3201 to S3202 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0363] In some embodiments, the execution order of steps S3201 to S3202 is not limited.

[0364] In the above embodiment, the service access network device of the WAB device can obtain the fifth message to determine the traffic mapping information, and then provide the traffic mapping information and / or the downlink transport layer information of the first PDU session to the WAB device through the third message, thereby ensuring the reliability of uplink and downlink transmission and improving the availability and reliability of the WAB.

[0365] FIG3C is an interactive diagram of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3C , the present disclosure embodiment relates to an information transmission method, which can be executed by the first core network device 103-1. The method includes:

[0366] Step S3301, obtain the first message.

[0367] In some embodiments, the first message may be used to request the first core network device 103 - 1 to establish or modify a first PDU session for the terminal part (WAB-MT) of the WAB device.

[0368] In some embodiments, the first core network device 103 - 1 may obtain the first message from the WAB device 101 , but is not limited thereto and may also receive the first message sent by other entities.

[0369] In some embodiments, the first core network device 103 - 1 obtains a first message determined according to a predefined rule.

[0370] In some embodiments, the first core network device 103 - 1 performs processing to obtain the first message.

[0371] In some embodiments, step S3301 is omitted, the first core network device 103-1 autonomously implements the function indicated by the first message, or the first core network device 103-1 obtains the first message based on predefined rules or protocol agreements, or the above functions are default or default.

[0372] In some embodiments, the optional implementation of step S3301 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.

[0373] Step S3302, sending a second message.

[0374] In some embodiments, the second message includes traffic mapping information.

[0375] In some embodiments, the first core network device 103 - 1 sends a second message to the WAB device 101 .

[0376] In some embodiments, the optional implementation of step S3302 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.

[0377] Step S3303, sending the fifth message.

[0378] In some embodiments, the first core network device 103 - 1 sends a fifth message to the service access network device 102 of the WAB device, and the fifth message may include traffic mapping information.

[0379] In some embodiments, the optional implementation of step S3303 can refer to the optional implementation of step S2103a in Figure 2 and other related parts of the embodiment involved in Figure 2, which will not be repeated here.

[0380] Step S3304, obtain the sixth message.

[0381] In some embodiments, the first core network device 103 - 1 may obtain the sixth message from the service access network device 102 of the WAB device, but is not limited thereto. The first core network device 103 - 1 may also receive the sixth message sent by other entities.

[0382] In some embodiments, the first core network device 103 - 1 obtains a sixth message determined according to a predefined rule.

[0383] In some embodiments, the first core network device 103 - 1 performs processing to obtain the sixth message.

[0384] In some embodiments, step S3304 is omitted, the first core network device 103-1 autonomously implements the function indicated by the sixth message, or the first core network device 103-1 obtains the sixth message based on predefined rules or protocol agreements, or the above functions are default or default.

[0385] In some embodiments, the optional implementation of step S3304 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.

[0386] In some embodiments, steps S3301 to S3304 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0387] In some embodiments, the execution order of steps S3301 to S3304 is not limited.

[0388] In the above embodiment, the first core network device can provide traffic mapping information to the WAB device and / or the service access network device of the WAB device, so that the WAB device and / or the service access network device of the WAB device transmits the uplink and downlink data of the terminal based on the traffic mapping information, ensuring the reliability of the uplink and downlink transmission, and improving the availability and reliability of the WAB.

[0389] FIG3D is an interactive diagram of an information transmission method according to an embodiment of the present disclosure. As shown in FIG3D , the present disclosure embodiment relates to an information transmission method, which can be executed by the second core network device 103-2. The method includes:

[0390] Step S3401, obtain the fourth message.

[0391] In some embodiments, the fourth message includes downlink transport layer information of the first PDU session, where the first PDU session is a PDU session established between the WAB device and the first core network device.

[0392] In some embodiments, the second core network device 103 - 2 may obtain the fourth message from the WAB device 101 , but is not limited thereto and may also receive the fourth message sent by other entities.

[0393] In some embodiments, the second core network device 103 - 2 obtains a fourth message determined according to a predefined rule.

[0394] In some embodiments, the second core network device 103 - 2 performs processing to obtain the fourth message.

[0395] In some embodiments, step S3401 is omitted, the second core network device 103-2 autonomously implements the function indicated by the fourth message, or the second core network device 103-2 obtains the fourth message based on predefined rules or protocol agreements, or the above functions are default or default.

[0396] In some embodiments, the optional implementation of step S3401 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.

[0397] In the above embodiment, the second core network device can obtain the fourth message, thereby obtaining the downlink transport layer information of the first PDU session, thereby ensuring the reliability of data transmission.

[0398] The above content is further illustrated below with examples.

[0399] In an embodiment of the present disclosure, a bearer establishment method is provided to support a terminal to establish a corresponding bearer for uplink and downlink data transmission when accessing via WAB.

[0400] In the embodiment of the present disclosure, the triggering of establishing or modifying a WAB-MT BH PDU session (first PDU session) includes:

[0401] - Triggered by UE PDU session (second PDU session) establishment or modification;

[0402] - During the PDU session establishment process, the WAB-MT needs to inform the core network (first core network device) of the relationship between the requested first PDU session and the UE PDU session, as well as auxiliary information so that the core network can perform node selection, session establishment or modification.

[0403] -The auxiliary information (or second PDU session information) includes:

[0404] Terminal identifier, used to indicate the specific terminal to which the information corresponds, which may be a GUTI or other identifier;

[0405] A second PDU session identifier is used to indicate that the terminal needs to establish a session;

[0406] SMF identifier, used to indicate the SMF node selected by the second PDU session;

[0407] A UPF identifier, used to indicate the UPF node selected by the second PDU session;

[0408] Uplink transport layer information (UL NG-U UP TNL Information), used to indicate the uplink transport layer information of the second PDU session;

[0409] Terminal policy information;

[0410] Information related to the second QoS flow.

[0411] In the embodiment of the present disclosure, the WAB-MT BH PDU session (first PDU session) establishment process includes:

[0412] -The core network (first core network) of the WAB-MT needs to indicate the mapping relationship between the serving base station BH PDU session and the UE PDU session of the WAB-MT;

[0413] - The serving base station of the WAB-MT needs to indicate the traffic mapping relationship between the WAB-MT BH PDU session information and the UE PDU session information, that is, indicate the traffic mapping information and use it for the downlink transport layer data of the UE PDU session.

[0414] The traffic mapping information includes one or more traffic mapping items, wherein each traffic mapping item includes at least one of the following:

[0415] Traffic mapping index;

[0416] The second PDU session information corresponding to the traffic;

[0417] The first PDU session information corresponding to the traffic.

[0418] The first PDU session information includes at least one of the following:

[0419] First PDU session identifier;

[0420] First QoS flow identifier;

[0421] The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

[0422] In the embodiment of the present disclosure, the uplink and downlink data transmission process of the terminal includes

[0423] -Based on the traffic mapping information, WAB needs to transmit uplink data;

[0424] -Based on the downlink transport layer information and traffic mapping information, UPF and WAB require DL data for transmission.

[0425] In Example 1, as shown in FIG4 , the contents irrelevant to the invention are omitted, that is, the specific process of establishing or modifying a PDU session by a core network device is omitted:

[0426] Step S4101: After the terminal accesses the network, it sends a PDU session establishment request message to the second core network device, such as AMF, to establish a second PDU session.

[0427] In step S4102, the second core network device, such as the AMF, sends a PDU session resource setup response message to the WAB-gNB.

[0428] The second PDU session is the PDU session of the UE.

[0429] In the embodiment of the present disclosure, the first PDU session and the second PDU session may be one or more PDU sessions, and one PDU session includes one or more QoS flows.

[0430] In step S4103, if the terminal is accessed through the WAB-gNB, the WAB-gNB notifies the WAB-MT to initiate a PDU session establishment or modification request (the example in Figure 4 shows the request process).

[0431] The PDU session initiated by the WAB-MT is the first PDU session, or may be called a BH PDU session, and the PDU session is the PDU session of the WAB-MT.

[0432] Among them, the terminal's PDU session transmission needs to rely on the WAB-MT's PDU session.

[0433] In some embodiments, multiple terminal PDU sessions can be mapped into one WAB-MT PDU session;

[0434] In some embodiments, multiple QoS flows in a terminal PDU session can be mapped to one or more QoS flows in a WAB-MT PDU session.

[0435] The WAB-MT sends a first message (e.g., a PDU session resource setup request message) to the first core network device of the WAB-MT, such as the AMF. The first message is used to allocate or modify resources on the Uu and NG-U for one or more PDU sessions and corresponding QoS flows, and to set the corresponding first DRB for a given terminal (here, the WAB-MT).

[0436] The first message includes UE PDU session related information.

[0437] The first core network device, such as AMF, initiates relevant core network processes based on the first message, such as selecting a suitable node (SMF) to establish or modify a PDU session.

[0438] The UE PDU session-related information includes at least one of the following information:

[0439] Terminal identifier, used to indicate the specific terminal to which the information corresponds, which may be a GUTI or other identifier;

[0440] A second PDU session identifier is used to indicate that the terminal needs to establish a session;

[0441] SMF identifier, used to indicate the SMF node selected by the second PDU session;

[0442] A UPF identifier, used to indicate the UPF node selected by the second PDU session;

[0443] UL NG-U UP TNL Information, used to indicate the uplink transport layer information of the second PDU session;

[0444] The information related to the second QoS flow includes the identifier of the second QoS flow and corresponding QoS parameters.

[0445] The AMF of the WAB-MT selects a suitable SMF according to the information, and the SMF performs operations related to session establishment or modification according to the information.

[0446] Step S4104a, the AMF of WAB-MT sends a second message (e.g., a PDU session establishment accept message) to WAB-MT, where the second message includes traffic mapping information.

[0447] In step S4104b, the AMF of the WAB-MT sends a fifth message (e.g., a PDU session resource establishment request message) to the service access network device of the WAB-MT, where the fifth message includes traffic mapping information. The service access network device of the WAB-MT may transmit uplink and downlink data related to the terminal based on the traffic mapping information.

[0448] The WAB-MT's service access network device sends a third message (e.g., an RRC reconfiguration message) to the WAB-MT, wherein the third message includes traffic mapping information and / or downlink transport layer information. The WAB-MT transmits uplink and downlink data related to the terminal based on the traffic mapping information.

[0449] The content of the traffic mapping information has been introduced in the above embodiment and will not be repeated here.

[0450] Among them, the second PDU session identifier and the second QoS flow identifier are information of the terminal; the first PDU session identifier, the first QoS flow identifier and the first DRB are information of the WAB-MT.

[0451] After receiving the traffic mapping information, the WAB-MT saves the information and transmits the uplink and downlink data related to the terminal according to the information.

[0452] Step S4105: The service access network device of the WAB-MT sends a sixth message (eg, a PDU session resource establishment response message) to the AMF of the WAB-MT.

[0453] In step S4106, the WAB-gNB sends a fourth message (e.g., a PDU Session Resource Establishment Response message) to the terminal's AMF. The fourth message includes the downlink transport layer information received in step 104b. The AMF transmits the information to the SMF. The SMF initiates a session establishment or modification procedure and transmits the information to the UPF. The UPF transmits downlink data related to the terminal based on the information.

[0454] In step S4107, the WAB-gNB sends an RRC reconfiguration message to the terminal, where the message includes information that the PDU session is successfully established.

[0455] WAB Behavior:

[0456] After the WAB-gNB receives uplink data from the terminal, the WAB-gNB transmits the uplink data through the corresponding first DRB (or the DRB corresponding to the first PDU session identifier and / or the first QoS flow identifier) ​​according to the second PDU session information corresponding to the uplink data, such as the second PDU session identifier and / or the second QoS flow identifier, and according to the traffic mapping information.

[0457] After the WAB-gNB receives downlink data from the UPF, the WAB-gNB receives the downlink data through the first DRB (or the DRB corresponding to the first PDU session identifier and / or the first QoS flow identifier), and transmits the downlink data to the terminal through the second DRB corresponding to the second PDU session identifier and / or the second QoS flow identifier according to the traffic mapping information.

[0458] In the above embodiments, the specific process of establishing or modifying a PDU session is consistent with the protocol agreed process and will not be repeated here.

[0459] The embodiments of the present disclosure also propose an apparatus for implementing any of the above methods. For example, an apparatus is proposed, which includes units or modules for implementing the steps performed by each node (e.g., WAB device, access network device, first core network device, second core network device) in any of the above methods.

[0460] 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), which realizes the functions of some or all of the above units or modules 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, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the 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 realized 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 rest by hardware circuits.

[0461] 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.

[0462] FIG5A is a schematic diagram of the structure of a WAB device according to an embodiment of the present disclosure. As shown in FIG5A , the WAB device 5100 may include: a processing module 5101 and a transceiver module 5102 .

[0463] In some embodiments, the above-mentioned processing module 5101 is configured to determine traffic mapping information in response to triggering the establishment, modification or selection of a first packet data unit PDU session, wherein the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, the second PDU session is a PDU session established between the terminal and the second core network device, and wherein the terminal accesses the access network part of the WAB device.

[0464] In some embodiments, the above-mentioned transceiver module 5102 is configured to transmit uplink data and / or downlink data based on the traffic mapping information, wherein the uplink data is data received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

[0465] In some embodiments, the processing module 5101 is configured to execute at least one of the other steps (such as step S2107 , but not limited thereto) executed by the WAB device 5100 in any of the above methods, which will not be described in detail here.

[0466] In some embodiments, the transceiver module 5102 is used to execute at least one of the communication steps such as sending and / or receiving performed by the WAB device 5100 in any of the above methods (for example, step S2101, step S2102, step S2103b, step S2105, step S2106, but not limited thereto), which will not be repeated here.

[0467] FIG5B is a schematic diagram of the structure of an access network device according to an embodiment of the present disclosure. As shown in FIG5B , the access network device 5200 may include a transceiver module 5201 .

[0468] In some embodiments, the above-mentioned transceiver module 5201 is configured to receive a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, and the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

[0469] Optionally, the transceiver module 5201 is further configured to send a third message to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

[0470] 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 access network device 5200 in any of the above methods (for example, step S2103a, step S2103b, step S2104, but not limited to this), which will not be repeated here.

[0471] FIG5C is a schematic diagram of the structure of a first core network device according to an embodiment of the present disclosure. As shown in FIG5C , the first core network device 5300 may include a transceiver module 5301 .

[0472] In some embodiments, the above-mentioned transceiver module 5301 is configured to send a second message to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, and the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

[0473] 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 performed by the first core network device 5300 in any of the above methods (for example, step S2101, step S2102, step S2103a, step S2104, but not limited to these), which will not be repeated here.

[0474] FIG5D is a schematic diagram of the structure of a second core network device according to an embodiment of the present disclosure. As shown in FIG5D , the second core network device 5400 may include a transceiver module 5401 .

[0475] In some embodiments, the above-mentioned transceiver module 5401 is configured to receive a fourth message sent by the wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of the first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device.

[0476] In some embodiments, the above-mentioned transceiver module 5401 is used to execute at least one of the communication steps such as sending and / or receiving (for example, step S2105, but not limited to this) performed by the second core network device 5400 in any of the above methods, which will not be repeated here.

[0477] 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.

[0478] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules each 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.

[0479] 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 can be a WAB device, an access network device, or a core network device, or can be a chip, chip system, or processor that supports the WAB device, access network device, or core network device in implementing any of the above methods. Communication device 6100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0480] 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, DUs or CUs, core network devices, WAB devices, 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.

[0481] 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 of sending and / or receiving in the above method (e.g., step S2101, step S2102, step S2103a, step S2103b, step S2104, step S2105, step S2106, but not limited thereto), and the processor 6101 performs at least one of the other steps (e.g., step S2107, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0482] 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.

[0483] 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.

[0484] 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.

[0485] The chip 6200 includes one or more processors 6201. The chip 6200 is configured to execute any of the above methods.

[0486] 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.

[0487] In some embodiments, the interface circuit 6202 performs at least one of the communication steps (e.g., steps S2101, S2102, S2103a, S2103b, S2104, S2105, and S2106) of the aforementioned method. For example, the interface circuit 6202 performing the communication steps (e.g., steps S2101, S2102, S2103a, S2103b, S2104, S2105, and S2106) of the aforementioned method 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., step S2107, but not limited thereto).

[0488] 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.

[0489] 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.

[0490] 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.

[0491] 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.

[0492] 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.

[0493] 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 wireless access backhaul (WAB) device, and includes: In response to triggering establishment, modification, or selection of a first packet data unit (PDU) session, determining traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device, and the second PDU session is a PDU session established between a terminal and a second core network device, and wherein the terminal accesses an access network portion of the WAB device; Based on the traffic mapping information, uplink data and / or downlink data are transmitted, wherein the uplink data is data that is received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data that is received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

2. The method according to claim 1, characterized in that The method further comprises at least one of the following: In response to establishing the second PDU session, determining to trigger establishment of the first PDU session; In response to modifying the second PDU session, determining to trigger modification of the first PDU session; In response to the second PDU session being established, determining triggers selection of the established first PDU session.

3. The method according to claim 1 or 2, characterized in that The method further comprises: A first message is sent to the first core network device, where the first message is used to request the first core network device to establish or modify the first PDU session for the terminal part of the WAB device, and the first message includes the second PDU session information.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Receive a second message sent by the first core network device, where the second message includes the traffic mapping information.

5. The method according to any one of claims 1 to 4, characterized in that The traffic mapping information includes one or more traffic mapping items, wherein each of the traffic mapping items includes at least one of the following: Traffic mapping index; The second PDU session information corresponding to the traffic; The first PDU session information corresponding to the traffic.

6. The method according to any one of claims 1 to 5, characterized in that The second PDU session information includes at least one of the following: Terminal identification; Second PDU session identifier; Second core network device identifier; Uplink transport layer information of the second PDU session; Terminal policy information; Second quality of service flow QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

7. The method according to any one of claims 1 to 6, characterized in that The first PDU session information includes at least one of the following: First PDU session identifier; First QoS flow identifier; The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: receiving a third message sent by the service access network device of the WAB device, where the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session; A fourth message is sent to the second core network device, where the fourth message includes downlink transport layer information of the first PDU session.

9. The method according to any one of claims 1 to 8, characterized in that Transmitting uplink data based on the traffic mapping information includes: After receiving the uplink data sent by the terminal, the access network part of the WAB device determines the second PDU session information corresponding to the uplink data; Determine, based on the traffic mapping information, a first DRB to which the second PDU session information is mapped, where the first DRB is a DRB transmitted between a terminal part of the WAB device and a service access network device of the WAB device; The terminal part of the WAB device sends a signal to the service access network device of the WAB device through the first DRB. The uplink data.

10. The method according to any one of claims 1 to 8, characterized in that Mapping and transmitting downlink data based on the traffic mapping information includes: After receiving the downlink data sent by the second core network device, the terminal part of the WAB device determines the first PDU session information corresponding to the downlink data; Determine, based on the traffic mapping information, a second DRB to which the first PDU session information is mapped, where the second DRB is a DRB transmitted between the terminal and an access network portion of the WAB device; The access network part of the WAB device sends the downlink data to the terminal through the second DRB.

11. A communication method, characterized in that: The method is performed by an access network device, and the method includes: Receiving a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, where the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device; A third message is sent to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

12. The method according to claim 11, characterized in that The traffic mapping information includes one or more traffic mapping items, wherein each of the traffic mapping items includes at least one of the following: Traffic mapping index; The second PDU session information corresponding to the traffic; The first PDU session information corresponding to the traffic.

13. The method according to claim 11 or 12, characterized in that The second PDU session information includes at least one of the following: Terminal identification; Second PDU session identifier; Second core network device identifier; Uplink transport layer information of the second PDU session; Terminal policy information; Second quality of service flow QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

14. The method according to any one of claims 11 to 13, characterized in that: The first PDU session information includes at least one of the following: First PDU session identifier; First QoS flow identifier; The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

15. A communication method, characterized in that: The method is performed by a first core network device, and the method includes: A second message is sent to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, and the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

16. The method according to claim 15, characterized in that The method further comprises: A first message sent by the WAB device is received, where the first message is used to request the first core network device to establish or modify the first PDU session for the terminal part of the WAB device.

17. The method according to claim 15 or 16, characterized in that The method further comprises: Sending a fifth message to the access network device to which the WAB device is connected, wherein the fifth message includes the traffic mapping information; A sixth message sent by the access network device is received, where the sixth message is used to respond to the fifth message.

18. The method according to any one of claims 15 to 17, characterized in that: The traffic mapping information includes one or more traffic mapping items, wherein each of the traffic mapping items includes at least one of the following: Traffic mapping index; The second PDU session information corresponding to the traffic; The first PDU session information corresponding to the traffic.

19. The method according to any one of claims 15 to 18, characterized in that: The second PDU session information includes at least one of the following: Terminal identification; Second PDU session identifier; Second core network device identifier; Uplink transport layer information of the second PDU session; Terminal policy information; Second quality of service flow QoS flow information, where the second QoS flow is the QoS flow in the second PDU session.

20. The method according to any one of claims 15 to 19, characterized in that: The first PDU session information includes at least one of the following: First PDU session identifier; First QoS flow identifier; The first data radio bearer DRB identifier is a DRB transmitted between the terminal part of the WAB device and the service access network device of the WAB device.

21. A communication method, characterized in that: The method is performed by a second core network device, and the method includes: Receive a fourth message sent by a wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of a first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device.

22. A wireless access backhaul WAB device, characterized in that: include: a processing module configured to, in response to triggering establishment, modification, or selection of a first packet data unit (PDU) session, determine traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and a first core network device, the second PDU session is a PDU session established between a terminal and a second core network device, and wherein the terminal accesses an access network portion of the WAB device; The transceiver module is configured to transmit uplink data and / or downlink data based on the traffic mapping information, wherein the uplink data is data that is received by the access network part of the WAB device from the terminal and forwarded to the second core network device by the terminal part of the WAB device, and wherein the downlink data is data that is received by the terminal part of the WAB device from the second core network device and forwarded to the terminal by the access network part of the WAB device.

23. An access network device, characterized in that: include: A transceiver module is configured to receive a fifth message sent by the first core network device, wherein the fifth message includes traffic mapping information, wherein the traffic mapping information is used to indicate a traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the wireless access backhaul WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device; The transceiver module is further configured to send a third message to the WAB device, wherein the third message includes the traffic mapping information and / or downlink transport layer information of the first PDU session.

24. A first core network device, characterized in that: include: The transceiver module is configured to send a second message to the wireless access backhaul WAB device, wherein the second message includes traffic mapping information, wherein the traffic mapping information is used to indicate the traffic mapping relationship between the first PDU session information and the second PDU session information, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device, and the second PDU session is a PDU session established between the terminal and the second core network device.

25. A second core network device, characterized in that: include: The transceiver module is configured to receive a fourth message sent by the wireless access backhaul WAB device, wherein the fourth message includes downlink transport layer information of the first PDU session, and wherein the first PDU session is a PDU session established between the WAB device and the first core network device.

26. A wireless access backhaul WAB device, 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 10.

27. An access network device, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 11 to 14.

28. A core network device, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 15 to 20 or 21.

29. A communication system, characterized in that: include: Wireless access backhaul WAB device, the WAB device is configured to implement the communication according to any one of claims 1-10 method; An access network device, wherein the access network device is configured to implement the communication method according to any one of claims 11 to 14; A first core network device, wherein the first core network device is configured to implement the communication method according to any one of claims 15 to 20; The second core network device is configured to implement the communication method according to claim 21.

30. 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 1-10, 11-14 or 15-21.

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