Method and device for data distribution in self-backhaul IAB network, and network-side equipment

Abstract

The present application discloses a method and apparatus for data diversion in a self-backhauled IAB network, and network-side equipment, and belongs to the field of communication technology. The method includes: upon receiving a data packet of diverted data from a first centralized unit CU in a first IAB network, a second CU in a second IAB network determines backhaul adaptation protocol BAP configuration information, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network; based on the BAP configuration information, the second CU configures the second host distributed unit donor DU in the second IAB network to transmit the data packet to the first IAB node in the first IAB network through the backhaul path in the second IAB network, wherein the first IAB node is a diversion node. The present application solves the problem in the prior art that CUs across IAB networks are unclear about each other's routing structure and topology configuration, thereby failing to achieve data diversion across IAB networks.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a method and device for data offloading in a self-backhauled IAB network, and a network-side device. Background Art

[0002] like Figure 1 As shown, the Integrated Access and Backhaul (IAB) node at the edge of the first centralized unit (CU) network has an F1 connection with the first CU (CU1), which is controlled by the first CU. The second parent IAB node connected by the dual connection technology is connected to the second host node (donor DU2), and the second parent IAB node is controlled by another CU (CU2). The purpose of establishing a redundant backhaul channel based on inter-CU DC with the second parent IAB node is to perform load sharing, that is, the uplink data can be routed from the UE to CU2 via the cross-CU network backhaul channel, and then forwarded to CU1 by CU2; and the downlink data can be forwarded from CU1 to CU2, and then routed to the target UE by CU2 via the cross-CU network backhaul channel. Figure 1 The IAB node IAB2 in is in the inter-CU DC state.

[0003] When the IAB node is in the inter-CU DC state, the routing configurations in the two IAB networks are independently configured by the two CUs, that is, CU2 in the second IAB network is not aware of the topology and routing configuration of CU1 in the first IAB network, and CU1 is also not aware of the routing structure and topology configuration of CU2, which results in the inability to achieve cross-IAB network data diversion when the uplink / downlink diversion data needs to be transmitted across different CUs in the IAB network. Summary of the invention

[0004] The embodiments of the present application provide a method and apparatus for data diversion in a self-backhauled IAB network, and a network-side device, which can solve the problem in the prior art that CUs across the IAB network are not aware of each other's routing structure and topology configuration, thereby failing to implement data diversion across the IAB network.

[0005] In a first aspect, a method for data diversion in a self-backhauled IAB network is provided, comprising: upon receiving a data packet of diverted data from a first centralized unit CU in a first IAB network, a second CU in a second IAB network determines backhaul adaptation protocol BAP configuration information, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network; based on the BAP configuration information, the second CU configures a second donor distributed unit donor DU in the second IAB network to transmit the data packet to a first IAB node in the first IAB network through a backhaul path in the second IAB network, wherein the first IAB node is a diversion node.

[0006] In a second aspect, a method for data diversion in a self-backhauled IAB network is provided, comprising: a second donor DU in a second IAB network determines first BAP header information and second BAP header information, wherein the first BAP header information is used to indicate routing information of the data packet in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet in the second IAB network; the second donor DU receives a data packet of diverted data sent by a first CU in the first IAB network or a second CU in the second IAB network; the second donor DU transmits the data packet to a first IAB node in the first IAB network through a second IAB node in the second IAB network based on the second BAP header information, wherein the first IAB node is a diversion node.

[0007] In a third aspect, a method for data offloading in a self-backhauled IAB network is provided, including: a first CU in a first IAB network sends configuration information to a second CU in a second IAB network; and the first CU sends a data packet of offloaded data to the second CU or a second donor DU in the second IAB network.

[0008] In a fourth aspect, a method for data diversion in a self-backhauled IAB network is provided, characterized in that it includes: a first IAB node in a first IAB network receives a data packet of diverted data transmitted by a second IAB node in a second IAB network; wherein the data packet carries second BAP header information and first BAP header information, and the destination address indicated by the second BAP header information is the BAP address of the first IAB node; the first IAB node determines whether to forward the data packet in the first IAB network based on the first BAP header information.

[0009] In a fifth aspect, a device for data diversion in a self-backhauled IAB network is provided, which is applied to a second CU in a second IAB network, and includes: a first determination module, which is used to determine the backhaul adaptation protocol BAP configuration information when receiving a data packet of diverted data from a first centralized unit CU in the first IAB network, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network; a first configuration module, which is used to configure the second host distributed unit donor DU in the second IAB network to transmit the data packet to the first IAB node in the first IAB network through the backhaul path in the second IAB network based on the BAP configuration information, wherein the first IAB node is a diversion node.

[0010] In a sixth aspect, a device for data diversion in a self-backhauled IAB network is provided, which is applied to a second donor DU in a second IAB network, and includes: a second determination module, used to determine first BAP header information and second BAP header information, wherein the first BAP header information is used to indicate routing information of a data packet of diverted data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet in the second IAB network; a second receiving module, used to receive a data packet of diverted data sent by a first CU in the first IAB network or a second CU in the second IAB network; a transmission module, used to transmit the data packet to a first IAB node in the first IAB network via a second IAB node in the second IAB network based on the second BAP header information, wherein the first IAB node is a diversion node.

[0011] In a seventh aspect, a device for data offloading in a self-backhauled IAB network is provided, which is applied to a first CU in a first IAB network, and includes: a first sending module, used to send configuration information to a second CU in a second IAB network; and a second sending module, used to send a data packet of offloaded data to the second CU or a second donor DU in the second IAB network.

[0012] In an eighth aspect, a device for data diversion in a self-backhauled IAB network is provided, which is applied to a first IAB node in a first IAB network, and includes: a third receiving module, used to receive a data packet of diverted data transmitted by a second IAB node in a second IAB network; wherein the data packet carries second BAP header information and first BAP header information, and the destination address indicated by the second BAP header information is the BAP address of the first IAB node; a third determining module, used to determine whether to forward the data packet in the first IAB network based on the first BAP header information.

[0013] In the ninth aspect, a network side device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect, or implements the steps of the method described in the second aspect, or implements the steps of the method described in the third aspect, or implements the steps of the method described in the fourth aspect.

[0014] In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented, or the steps of the method described in the fourth aspect are implemented.

[0015] In the eighth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a network-side device program or instruction to implement the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect, or the steps of the method described in the fourth aspect.

[0016] In an embodiment of the present application, the second CU in the second IAB network can determine the routing information in the first IAB network and the second IAB network according to the backhaul adaptation protocol BAP configuration information, and then, when receiving the data packet of the diverted data of the first centralized unit CU in the first IAB network, the second donor distributed unit donor DU in the second IAB network can be configured to transmit the data packet to the first IAB node in the first IAB network through the backhaul path in the second IAB network, thereby realizing the transmission of the data packet from the second IAB network to the first IAB node (diverting node) of the first IAB network, realizing data diversion across IAB networks, and solving the problem in the prior art that CUs across IAB networks are not clear about each other's routing structure and topology configuration, thereby making it impossible to realize data diversion across IAB networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a topological diagram of a cross-IAB network in the prior art;

[0018] Figure 2 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0019] Figure 3 is a schematic diagram of an IAB system in the prior art;

[0020] Figure 4This is a schematic diagram of the structure of a centralized / distributed unit of an IAB system in an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of an IAB system of two CU networks in an embodiment of the present application;

[0022] Figure 6 The method flow of data distribution in the IAB network of the embodiment of the present application is as follows Figure 1 ;

[0023] Figure 7 The method flow of data distribution in the IAB network of the embodiment of the present application is as follows Figure 2 ;

[0024] Figure 8 The method flow of data distribution in the IAB network of the embodiment of the present application is as follows Figure 3 ;

[0025] Fig. 9 The method flow of data distribution in the IAB network of the embodiment of the present application is as follows Figure 4 ;

[0026] Fig.10 This is a schematic diagram of the structure of the data packet in the embodiment of the present application. Figure 1 ;

[0027] Fig.11 This is a schematic diagram of the structure of the data packet in the embodiment of the present application. Figure 2 ;

[0028] Fig.12 The structure of the device for data distribution in the IAB network of the embodiment of the present application is shown in FIG. Figure 1 ;

[0029] Fig.13 The structure of the device for data distribution in the IAB network of the embodiment of the present application is shown in FIG. Figure 2 ;

[0030] Fig.14 The structure of the device for data distribution in the IAB network of the embodiment of the present application is shown in FIG. Figure 3 ;

[0031] Fig.15 The structure of the device for data distribution in the IAB network of the embodiment of the present application is shown in FIG. Figure 4 ;

[0032] Fig.16 is a schematic diagram of the structure of a communication device according to an embodiment of the present application;

[0033] Fig.17 It is a schematic diagram of the structure of the network side device of an embodiment of the present application. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0035] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0036] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0037] Figure 2A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0038] The following are explanations of the relevant terms in this application;

[0039] Figure 3 Schematic diagram of an Integrated Access and Backhaul (IAB) system in the prior art, such as Figure 3As shown, an IAB node includes a distributed unit (DU) functional part and a mobile terminal (MT) functional part. Relying on the MT, an access node (i.e., IAB node) can find an upstream access point (parent IAB node or IAB-donor-DU) and establish a wireless connection with the DU of the upstream access point. This wireless connection is called a backhaul link. After an IAB node establishes a complete backhaul link, the IAB node turns on its DU function, and the DU will provide cell services, that is, the DU can provide access services for user equipment (UE). A self-backhaul loop includes a donor IAB node (or IAB donor), and the donor IAB node has a directly connected wired transmission network.

[0040] Figure 4 This is a schematic diagram of the centralized / distributed unit (CU-DU) structure of an IAB system. Figure 4 As shown in the figure, in a self-backhaul loop, the DUs of all IAB nodes are connected to a CU node, which configures the DUs through the F1-AP protocol. The CU configures the MT through the RRC protocol. The DonorIAB node does not have the MT function part.

[0041] The IAB system is introduced to solve the problem that the wired transmission network is not deployed properly when the access points are densely deployed. That is, when there is no wired transmission network, the access points can rely on wireless backhaul.

[0042] Figure 5 is a schematic diagram of the IAB system of two CU networks, such as Figure 5 As shown, there are two IAB networks of CU systems, in which the backhaul adaptation protocol (BAP) addresses, BAP routes, and mapping of input logical channels to output logical channels of IAB nodes IAB1, IAB2, IAB5, and IAB6 are all configured by CU1; and the corresponding parameters of IAB nodes IAB3, IAB4, and IAB7 are all configured by CU2. According to the current protocol, the DU of an IAB node has only one F1 connection, that is, it can only receive configuration signaling from one CU, including BAP addresses, BAP routes, and mapping of input logical channels to output logical channels.

[0043] According to the current routing protocol, the route is identified by the BAP header, which contains the BAP routing identifier (i.e., routing ID). The BAP routing identifier includes the destination BAP address and the path ID. For uplink data, the destination address is the BAP address of the donor DU, and for downlink data, the destination address is the BAP address of the access IAB node of the data receiving UE.

[0044] For downlink data, the donor DU determines the routing identifier of a downlink data packet based on the correspondence between the IP parameters (IPv4 address, IP v6address, IPv6 prefix, DSCP) configured by the CU and the routing identifier; and maps the data packet to the appropriate backhaul logical channel (Backhaul RLC channel) according to the Quality of Service (QoS) requirements configured by the CU.

[0045] For uplink data, when the access IAB node receives data from the UE, it determines the BAP header of the data based on the GTP-U (GPRS Tunneling Protocol) TEID identifier corresponding to the data, the correspondence between the CU pre-configured tunnel endpoint identifier (TEID) and the routing identifier, and the correspondence between the ingress logical channel and the egress logical channel, and maps the data to the egress logical channel.

[0046] For the intermediate IAB node, whether it is uplink data or downlink data, the output backhaul link and the backhaul logical channel on the output backhaul link are determined according to the BAPheader of the received BAP data packet and the ID of the input logical channel, and the backhaul link and the backhaul logical channel are used to transmit data.

[0047] It should be noted that, for the intermediate node, both the uplink and downlink, the input logical channel and the output logical channel are return logical channels; for the uplink of the access IAB node, the input logical channel is the Uu logical channel, and the output logical channel is the return logical channel; the downlink is the opposite.

[0048] The method for data offloading in a self-backhaul IAB network provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios.

[0049] The present application embodiment provides a method for data offloading in a self-backhaul IAB network, such as Figure 6 As shown, the steps of the method include:

[0050] Step 602, upon receiving a data packet of offloaded data from a first centralized unit CU in a first IAB network, a second CU in a second IAB network determines backhaul adaptation protocol BAP configuration information, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network;

[0051] Step 604: The second CU configures the second donor distributed unit donor DU in the second IAB network to transmit a data packet to the first IAB node in the first IAB network through a backhaul path in the second IAB network based on the BAP configuration information, wherein the first IAB node is a distribution node.

[0052] Through the above steps 602 and 604, the second CU in the second IAB network can determine the routing information in the first IAB network and the second IAB network according to the backhaul adaptation protocol BAP configuration information, and then, when receiving the data packet of the diverted data of the first centralized unit CU in the first IAB network, the second donor distributed unit donor DU in the second IAB network can be configured to transmit the data packet to the first IAB node in the first IAB network through the backhaul path in the second IAB network, thereby realizing the transmission of the data packet from the second IAB network to the first IAB node (diverting node) of the first IAB network, realizing data diversion across IAB networks, and solving the problem in the prior art that CUs across IAB networks are not clear about each other's routing structure and topology configuration, thereby failing to realize data diversion across IAB networks.

[0053] In an optional implementation manner of the embodiment of the present application, before the second CU in the second IAB network determines the BAP configuration information, the method steps of the embodiment of the present application may further include:

[0054] Step 601: The second CU receives configuration information sent by the first CU, wherein the configuration information includes at least one of the following: BAP address information of the first IAB node, routing information of the offloaded data in the first IAB network, and quality of service QoS parameters of the service corresponding to the offloaded data.

[0055] It can be known from the above step 601 that to realize data diversion between different IAB networks, the CU of one IAB network can send configuration information to the CU in another IAB network, and the configuration information is used for the subsequent second CU to determine the routing information in the first IAB network and the second IAB network. Based on this, in an optional implementation of the embodiment of the present application, the method for determining the BAP configuration information of the second CU in the second IAB network involved in step 602 can further include:

[0056] Step 602-11, the second CU configures parameter information of the offloaded data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node, and a mapping relationship of a return logical channel;

[0057] Step 602-12: The second CU configures routing configuration information of the offloaded data in the first IAB network according to the configuration information, wherein the routing configuration information includes at least one of the following: routing information from the first IAB node to the destination IAB node, a mapping relationship of the return logical channel, and a quality of service QoS parameter of the service corresponding to the offloaded data.

[0058] It can be seen from the above steps 602-11 and 602-12 that the second CU can determine the routing information of the data packet in the second IAB network according to the configuration information, that is, the routing information between the second donor DU and the first IAB node, and can also determine the routing configuration information of the data packet in the first IAB network, that is, determine which node in the first IAB network is the diversion node. After determining the diversion node, it is also necessary to determine the mapping relationship of the return logical channel in the first IAB network, that is, after the data packet arrives at the diversion node, whether to continue to transmit in the first IAB network, and the node to continue to transmit.

[0059] In an optional implementation of the embodiment of the present application, the data packet in the embodiment of the present application carries the first BAP header information of the data packet in the first IAB network. Based on this, the manner in which the second CU in the second IAB network involved in step 602 of the embodiment of the present application determines the BAP configuration information may further include:

[0060] Step 602-21, the second CU configures parameter information of the offloaded data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node in the second IAB network, a mapping relationship of the backhaul logical channel, and a quality of service QoS parameter of the service corresponding to the offloaded data;

[0061] Step 602-22: The second CU determines the second BAP header information of the data packet in the second IAB network according to the parameter information.

[0062] That is to say, the data packet is transmitted across the IAB network based on the first BAP header information and the second BAP header information in the data packet, and the first BAP header information carries the destination address in the first IAB network, and the destination BAP address in the second BAP header information is the BAP address of the shunt IAB node. The first BAP can be configured in the data packet by the first CU in the first IAB network and sent to the second CU in the second IAB network, so that the second CU does not need to configure the first BAP header information, but only needs to configure the second BAP header information.

[0063] If the data packet carries the first BAP header information of the data packet in the first IAB network, the method steps of the embodiment of the present application may further include:

[0064] Step 606: The second CU reads and removes the first BAP header information from the data packet to restore the data packet.

[0065] That is, if the data packet carries the first BAP header information of the data packet in the first IAB network, the second CU is required to restore the data packet to extract the first BAP header information.

[0066] Based on this, the method steps of the embodiment of the present application may also include:

[0067] Step 608, after the second CU in the second IAB network determines the BAP configuration information, the second CU configures the second donor DU to add the target BAP header information to the data packet to form a BAP protocol data unit PDU based on the BAP configuration information, wherein the target BAP header information includes the first BAP header information and the second BAP header information.

[0068] That is to say, whether the data packet carries the first BAP header information of the data packet in the first IAB network or does not carry the first BAP header information, the second CU will add the BAP header information to the data packet to form a BAP protocol data unit PDU, that is, place the first BAP header information and the second BAP header information at designated positions in the PDU.

[0069] It should be noted that the routing configuration information of the shunted data in the first IAB network in the embodiment of the present application includes the destination address and the return adaptation protocol header information in the first IAB network corresponding to the destination address. That is to say, if the first IAB node (shunting node) is not the final node, it is also necessary to forward the data packet to the destination address through the first IAB node in the first IAB network, that is, the node corresponding to the destination address in the first IAB network, so as to finally realize the shunting of the shunted data in the two IAB networks.

[0070] The above is an explanation of the embodiment of the present application from the perspective of the second CU of the second IAB network. The following is an explanation of the embodiment of the present application from the perspective of the second donor DU of the second IAB network. Based on this, the embodiment of the present application also provides a method for data offloading in a self-backhaul IAB network, such as Figure 7 As shown, the steps of the method include:

[0071] Step 702, the second donor DU in the second IAB network determines first BAP header information and second BAP header information, wherein the first BAP header information is used to indicate routing information of the data packet of the offloaded data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet of the offloaded data in the second IAB network;

[0072] Step 704, the second donor DU receives a data packet of the offloaded data sent by the first CU in the first IAB network or the second CU in the second IAB network;

[0073] Step 706: The second donor DU transmits the data packet to the first IAB node in the first IAB network through the second IAB node in the second IAB network based on the second BAP header information, wherein the first IAB node is a diversion node.

[0074] It can be seen that the second donor DU in the second IAB network can directly receive the data packet of the diverted data sent by the first IAB network, or the data packet can be sent from the first IAB network to the second CU of the second network and then forwarded to the second donor DU by the second CU. Then, the second donor DU transmits the data packet to the first IAB node in the first IAB network according to the second BAP header information.

[0075] The above is an explanation of the embodiment of the present application from the perspective of the second CU and the second donor DU of the second IAB network. The present application will be explained from the perspective of the first IAB network.

[0076] In an embodiment of the present application, based on a first CU on a first IAB network side, a method for data offloading in a self-backhauled IAB network is provided, such as Figure 8 As shown, the steps of the method include:

[0077] Step 802: A first CU in a first IAB network sends configuration information to a second CU in a second IAB network;

[0078] Step 804: The first CU sends a data packet of the offloaded data to a second CU or a second donor DU in a second IAB network.

[0079] It can be known from the above steps 802 and 804 that, in addition to sending configuration information to the second CU, the first CU can also send data packets to be diverted across networks. The data packets can be sent to the second CU or directly to the second donor DU, that is, the separation of configuration and data can be achieved. After the first CU sends the configuration information to the second CU, the second CU can configure the routing information of the data packets in the first IAB network and the second IAB network according to the configuration information, thereby achieving data diversion across IAB networks.

[0080] It should be noted that the configuration information in the embodiment of the present application may include at least one of the following: information of the first IAB node (diversion node) in the first IAB network, routing mapping information of the diverted data in the first IAB network, and QoS parameters of the service corresponding to the diverted data.

[0081] In addition, the embodiment of the present application also provides a method for data offloading in a self-backhauled IAB network. The method is described based on the first IAB node side of the first IAB network in the example of the present application. Fig. 9 As shown, the steps of the method include:

[0082] Step 902: A first IAB node in a first IAB network receives a data packet of offloaded data transmitted by a second IAB node in a second IAB network; wherein the data packet carries second BAP header information and first BAP header information, and the destination address indicated by the second BAP header information is the BAP address of the first IAB node;

[0083] Step 904: The first IAB node determines whether to forward the data packet in the first IAB network according to the first BAP header information.

[0084] It can be seen that after receiving the data packet, the first IAB node needs to determine whether to forward the data packet according to the first BAP header information, because if the destination address indicated by the first BAP is consistent with the address of the first IAB node, there is no need to forward the data packet.

[0085] Specifically, the manner in which the first IAB node involved in step 904 determines whether to forward the data packet in the first IAB network according to the first BAP header information may further include:

[0086] Step 904-11, when the destination address carried in the first BAP header information matches the address of the first IAB node, the first IAB node removes the first BAP header information and the second BAP header information from the data packet, and submits the processed data packet of the offloaded data to the upper layer;

[0087] Step 904-12: When the destination address carried in the first BAP header information does not match the address of the first IAB node, the first IAB node removes the second BAP header in the data packet and forwards the processed data packet according to the first BAP header information.

[0088] That is, if the destination address carried in the first BAP header information matches the address of the first IAB node, the data packet is not forwarded; if they do not match, the data packet is forwarded according to the first BAP header information.

[0089] In the following, in conjunction with the specific implementation manner of the embodiment of the present application, the method for data offloading in the IAB network in the embodiment of the present application is described by way of example.

[0090] In this specific implementation, an IAB network inter-CU (i.e., inter-CU) dual-connection routing method is provided, and the steps of the method include:

[0091] Step 11, CU1 notifies CU2 of the configuration information of downlink splitting;

[0092] The configuration information may include: IAB node information for offloading, BAP routing mapping information and QoS parameters between offloading data and CU1 network.

[0093] The routing mapping information may further include: mapping information of IP v4 / v6 address, IP v6 prefix and DSCP with routing ID in CU1 network; QoS parameters may further include: rate and delay requirements.

[0094] Step 12: CU2 configures parameter information of the downlink offload data in the CU2 network according to the received configuration information;

[0095] The parameter information includes the route from the second donor DU (SN donor or donor DU2) to the offload IAB node and the backhaul logical channel mapping relationship.

[0096] Step 13, after CU2 receives a downlink offload data packet from CU1 through the Xn interface, the SN donor (i.e., donor DU2) generates a BAP header (BAP header 1, i.e., first BAP header information) of the data packet in the first CU network and a BAP header (BAP header 2, i.e., second BAP header information) of the data packet in the CU2 network according to the information from the above CU2 configuration and the IP header information of the data packet.

[0097] The destination BAP address in the BAP header2 is the BAP address of the offload IAB node, such as Fig.10 As shown, BAP header 1 and BAP header 2 are placed in front of the received data packet to form the BAP PDU in the CU2 network. When the BAP data packet is transmitted in the CU network;

[0098] Step 14: CU2 forwards data according to BAP header 2.

[0099] The BAP header 1 is transparent to the number of intermediate IAB nodes in the second IAB network.

[0100] Step 15, when the offload IAB node receives the offload data from IAB3, it determines whether it is the data it should receive based on the address of BAP header 2. If so, it removes BAP header 2 to form a new BAP PDU with only BAP header 1, such as Fig.11 As shown, the shunted data is processed in the CU1 network according to the BAP header 1;

[0101] If the BAP address carried in the BAP header 1 is the same as the BAP address of the offload IAB node, the BAP header 1 is removed and the data is submitted to the PDU of the upper layer PDCP;

[0102] If the BAP address carried in the BAP header 1 is different from the BAP address of the offload IAB node, the data is forwarded in the CU network according to the BAP header 1.

[0103] It should be noted that in another specific implementation of the present application, CU1 does not need to notify CU2 of the routing configuration information of the diverted data in the CU1 network. CU1 or donor DU1 directly determines the routing configuration for the diverted data in the CU1 network, and generates a BAP header1 corresponding to the CU1 network route for the diverted data (header1 is carried in the data packet), and attaches the BAP header1 to the diverted data packet and sends it to CU2. CU2 configures the second donor DU (donor DU2) to take out BAPheader1. At the same time, donor DU2 adopts a method similar to steps 11 to 15 above. Donor DU2 generates a BAP header 2 corresponding to the CU2 network route for the diverted data; then, donor DU 2 generates a BAP header 2 corresponding to the CU2 network route for the diverted data; Fig.11 The format of the diversion data BAPPDU is formed.

[0104] Through this application, load sharing in the inter-CU DC state can be achieved, and load sharing between sidelink relay networks extended across gNBs can also be achieved.

[0105] It should be noted that the method for data diversion in an IAB network provided in an embodiment of the present application may be executed by a device for data diversion in an IAB network, or a control module in the device for data diversion in an IAB network for executing the method for data diversion in an IAB network. In the embodiment of the present application, the device for data diversion in an IAB network provided in an embodiment of the present application is described by taking the method for data diversion in an IAB network executed by a device for data diversion in an IAB network as an example.

[0106] The embodiments of the present application provide a device for data offloading in a self-backhauled IAB network. The device is applied to a second CU in a second IAB network, such as Fig.12 As shown, the device comprises:

[0107] A first determining module 1202 is configured to determine backhaul adaptation protocol BAP configuration information when receiving a data packet of offloaded data from a first centralized unit CU in a first IAB network, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network;

[0108] The first configuration module 1204 is used to configure the second donor distributed unit donor DU in the second IAB network to transmit data packets to the first IAB node in the first IAB network through the backhaul path in the second IAB network based on the BAP configuration information, wherein the first IAB node is a distribution node.

[0109] Through the device of the embodiment of the present application, the routing information in the first IAB network and the second IAB network can be determined according to the backhaul adaptation protocol BAP configuration information, and then, when a data packet of the diverted data of the first centralized unit CU in the first IAB network is received, the second host distributed unit donor DU in the second IAB network can be configured to transmit the data packet to the first IAB node in the first IAB network through the backhaul path in the second IAB network, thereby realizing the transmission of the data packet from the second IAB network to the first IAB node of the first IAB network, realizing data diversion across IAB networks, and solving the problem in the prior art that CUs across IAB networks are not clear about each other's routing structure and topology configuration, thereby making it impossible to realize data diversion across IAB networks.

[0110] Optionally, the device in the embodiment of the present application may also include: a first receiving module, used to receive configuration information sent by the first CU before determining the BAP configuration information, wherein the configuration information includes at least one of the following: BAP address information of the first IAB node, routing information of the diverted data in the first IAB network, and quality of service QoS parameters of the service corresponding to the diverted data.

[0111] Optionally, the first determination module 1202 in the embodiment of the present application may further include: a first configuration unit, used to configure parameter information of the diverted data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node, and a mapping relationship of the return logical channel; a second configuration unit, used to configure routing configuration information of the diverted data in the first IAB network according to the configuration information, wherein the routing configuration information includes at least one of the following: routing information from the first IAB node to the destination IAB node, a mapping relationship of the return logical channel, and a quality of service QoS parameter of the service corresponding to the diverted data.

[0112] Optionally, when the data packet carries the first BAP header information of the data packet in the first IAB network, the first determination module 1202 in the embodiment of the present application may further include: a third configuration unit, used to configure parameter information of the diverted data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node in the second IAB network, a mapping relationship of the return logical channel, and a quality of service QoS parameter of the service corresponding to the diverted data; a determination unit, used to determine the second BAP header information of the data packet in the second IAB network according to the parameter information.

[0113] Optionally, the device in the embodiment of the present application may further include: a processing module, configured to read and remove the first BAP header information from the data packet to restore the data packet.

[0114] Optionally, the device in the embodiment of the present application may also include: a second configuration module, used to configure the second donor DU to add target BAP header information to the data packet to form a BAP protocol data unit PDU based on the BAP configuration information after determining the BAP configuration information, wherein the target BAP header information includes first BAP header information and second BAP header information.

[0115] It should be noted that the routing configuration information of the offloaded data in the first IAB network in the embodiment of the present application includes the destination address and the BAP header information in the first IAB network corresponding to the destination address.

[0116] The above is an explanation of the present application from the second CU side of the second network. The following is an explanation from the second donor DU side of the second network.

[0117] The embodiments of the present application provide a device for data offloading in a self-backhauled IAB network. The device is applied to a second donor DU in a second IAB network, such as Fig.13 As shown, the device comprises:

[0118] The second determining module 1302 is used to determine first BAP header information and second BAP header information, wherein the first BAP header information is used to indicate routing information of the data packet of the offloaded data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet in the second IAB network;

[0119] The second receiving module 1304 is configured to receive a data packet of offloaded data sent by the first CU in the first IAB network or the second CU in the second IAB network;

[0120] The transmission module 1306 is configured to transmit the data packet to the first IAB node in the first IAB network through the second IAB node in the second IAB network based on the second BAP header information, wherein the first IAB node is a shunt node.

[0121] It can be seen that the device for the second donor DU in the second IAB network can directly receive the data packet of the diverted data sent by the first IAB network, or it can be sent from the first IAB network to the second CU of the second network and then forwarded to the second donor DU by the second CU. Then, the second donor DU transmits the data packet to the first IAB node in the first IAB network according to the second BAP header information.

[0122] The above is an explanation of the embodiment of the present application from the perspective of the second CU and the second donor DU of the second IAB network. The present application will be explained from the perspective of the first IAB network.

[0123] The embodiment of the present application provides a device for data offloading in a self-backhauled IAB network, and the device is applied to a first CU in a first IAB network, such as Fig.14 As shown, the device comprises:

[0124] A first sending module 1402, configured to send configuration information to a second CU in a second IAB network;

[0125] The second sending module 1404 is configured to send a data packet of the offloaded data to a second CU or a second donor DU in a second IAB network.

[0126] It can be seen that in addition to sending configuration information to the second CU, the first CU can also send data packets to be diverted across networks. The data packets can be sent to the second CU or directly to the second donor DU, which can achieve the separation of configuration and data. After the first CU sends the configuration information to the second CU, the second CU can configure the routing information of the data packet in the first IAB network and the second IAB network according to the configuration information, thereby achieving data diversion across IAB networks.

[0127] It should be noted that the configuration information in the embodiment of the present application includes at least one of the following: information of the first IAB node in the first IAB network, routing mapping information of the offloaded data in the first IAB network, and QoS parameters of the service corresponding to the offloaded data.

[0128] In addition, the present application also provides a device for data offloading in a self-backhauled IAB network, the device being applied to a first IAB node in a first IAB network, such as Fig.15 As shown, the device comprises:

[0129] The third receiving module 1502 is used to receive a data packet of the offloaded data transmitted by the second IAB node in the second IAB network; wherein the data packet carries the second BAP header information and the first BAP header information, and the destination address indicated by the second BAP header information is the BAP address of the first IAB node;

[0130] The third determining module 1504 is configured to determine whether to forward the data packet in the first IAB network according to the first BAP header information.

[0131] It can be seen that after receiving the data packet, the first IAB node needs to determine whether to forward the data packet according to the first BAP header information, because if the destination address indicated by the first BAP is consistent with the address of the first IAB node, there is no need to forward the data packet.

[0132] Optionally, the third determination module 1504 may further include: a first processing unit, used to remove the first BAP header information and the second BAP header information in the data packet when the destination address carried by the first BAP header information matches the address of the first IAB node, and submit the processed data packet of the diverted data to the upper layer; a second processing unit, used to remove the second BAP header in the data packet when the destination address carried by the first BAP header information does not match the address of the first IAB node, and forward the processed data packet according to the first BAP header information.

[0133] The device for data diversion in the IAB network in the embodiment of the present application may be a device, or a component, integrated circuit, or chip in a terminal. The device may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may include but is not limited to the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0134] The device for data distribution in the IAB network in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0135] The device for data distribution in the IAB network provided in the embodiment of the present application can achieve Figures 6 to 9 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0136] Optional, such as Fig.16As shown, the embodiment of the present application further provides a communication device 1600, including a processor 1601, a memory 1602, and a program or instruction stored in the memory 1602 and executable on the processor 1601. For example, when the communication device 1600 is a terminal, the program or instruction is executed by the processor 1601 to implement the various processes of the above-mentioned method embodiment for data diversion in the IAB network, and the same technical effect can be achieved. When the communication device 1600 is a network side device, the program or instruction is executed by the processor 1601 to implement the various processes of the above-mentioned method embodiment for data diversion in the IAB network, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0137] Specifically, the embodiment of the present application also provides a network side device. Fig.17 As shown, the network device 1700 includes: an antenna 171, a radio frequency device 172, and a baseband device 173. The antenna 171 is connected to the radio frequency device 172. In the uplink direction, the radio frequency device 172 receives information through the antenna 171 and sends the received information to the baseband device 173 for processing. In the downlink direction, the baseband device 173 processes the information to be sent and sends it to the radio frequency device 172, and the radio frequency device 172 processes the received information and sends it out through the antenna 171.

[0138] The frequency band processing device may be located in the baseband device 173 . The method performed by the network-side device in the above embodiment may be implemented in the baseband device 173 . The baseband device 173 includes a processor 174 and a memory 175 .

[0139] The baseband device 173 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.17 As shown, one of the chips is, for example, a processor 174, which is connected to a memory 175 to call a program in the memory 175 to execute the network device operations shown in the above method embodiment.

[0140] The baseband device 173 may further include a network interface 176 for exchanging information with the radio frequency device 172 . The interface may be, for example, a common public radio interface (CPRI).

[0141] Specifically, the network side device of the embodiment of the present invention further includes: instructions or programs stored in the memory 175 and executable on the processor 174, and the processor 174 calls the instructions or programs in the memory 175 to execute Figures 12 to 15 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0142] The embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the method embodiment of data diversion in the above-mentioned IAB network is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0143] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0144] The embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a network-side device program or instruction to implement each process of the above-mentioned method embodiment for data diversion in the IAB network, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0145] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0146] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0147] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0148] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for data offloading in a self-backhaul IAB network, characterized in that: include: Upon receiving a data packet of offloaded data from a first centralized unit CU in a first IAB network, a second CU in a second IAB network determines backhaul adaptation protocol BAP configuration information, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network; The second CU configures, based on the BAP configuration information, a second donor distributed unit in the second IAB network to transmit the data packet to a first IAB node in the first IAB network through a backhaul path in the second IAB network, wherein the first IAB node is a shunt node; Before the second CU in the second IAB network determines the BAP configuration information, the method further includes: The second CU receives configuration information sent by the first CU, wherein the configuration information is used to determine the BAP configuration information, and the configuration information includes at least one of the following: BAP address information of the first IAB node, routing information of the diverted data in the first IAB network, and quality of service QoS parameters of the service corresponding to the diverted data.

2. The method according to claim 1, characterized in that The second CU in the second IAB network determines BAP configuration information, including: The second CU configures parameter information of the offloaded data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node, and a mapping relationship of a backhaul logical channel; The second CU configures routing configuration information of the diverted data in the first IAB network according to the configuration information, wherein the routing configuration information includes at least one of the following: routing information from the first IAB node to the destination IAB node, a mapping relationship of the return logical channel, and a quality of service QoS parameter of the service corresponding to the diverted data.

3. The method according to claim 1, characterized in that In a case where the data packet carries first BAP header information of the data packet in the first IAB network, the second CU in the second IAB network determines BAP configuration information, including: The second CU configures parameter information of the offloaded data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node in the second IAB network, a mapping relationship of a backhaul logical channel, and a quality of service QoS parameter of a service corresponding to the offloaded data; The second CU determines second BAP header information of the data packet in the second IAB network according to the parameter information.

4. The method according to claim 3, characterized in that The method further comprises: The second CU reads and removes the first BAP header information from the data packet to restore the data packet.

5. The method according to claim 3, characterized in that: After the second CU in the second IAB network determines the BAP configuration information, the method further includes: Based on the BAP configuration information, the second CU configures the second donor DU to add target BAP header information to the data packet to form a BAP protocol data unit PDU, wherein the target BAP header information includes the first BAP header information and the second BAP header information.

6. The method according to claim 2, characterized in that The routing configuration information of the offloaded data in the first IAB network includes a destination address and BAP packet header information corresponding to the destination address in the first IAB network.

7. A method for data offloading in a self-backhaul IAB network, characterized in that: include: The second donor DU in the second IAB network determines first BAP header information and second BAP header information, wherein the first BAP header information is used to indicate routing information of a data packet of the offloaded data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet in the second IAB network; The second donor DU receives a data packet of offloaded data sent by the first CU in the first IAB network or the second CU in the second IAB network; The second donor DU transmits the data packet to a first IAB node in the first IAB network through a second IAB node in the second IAB network based on the second BAP header information, wherein the first IAB node is a diversion node.

8. A method for data offloading in a self-backhaul IAB network, characterized in that: include: A first CU in the first IAB network sends configuration information to a second CU in the second IAB network; The first CU sends a data packet of offloaded data to the second CU or a second donor DU in the second IAB network; The configuration information is used to determine backhaul adaptation protocol BAP configuration information, and the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network.

9. The method according to claim 8, characterized in that The configuration information includes at least one of the following: information of a first IAB node in the first IAB network, routing mapping information of the offloaded data in the first IAB network, and QoS parameters of a service corresponding to the offloaded data; The first IAB node is a distribution node.

10. A method for data offloading in a self-backhaul IAB network, characterized in that: include: A first IAB node in a first IAB network receives a data packet of offloaded data transmitted by a second IAB node in a second IAB network; wherein the data packet carries second BAP header information and first BAP header information, and a destination address indicated by the second BAP header information is a BAP address of the first IAB node; The first IAB node determines whether to forward the data packet in the first IAB network according to the first BAP header information; The first BAP header information is used to indicate routing information of the data packet of the diverted data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet of the diverted data in the second IAB network.

11. The method according to claim 10, characterized in that The first IAB node determines whether to forward the data packet in the first IAB network according to the first BAP header information, including: In the case where the destination address carried by the first BAP header information matches the address of the first IAB node, the first IAB node removes the first BAP header information and the second BAP header information from the data packet, and submits the processed data packet of the offloaded data to an upper layer; When the destination address carried in the first BAP header information does not match the address of the first IAB node, the first IAB node removes the second BAP header in the data packet and forwards the processed data packet according to the first BAP header information.

12. A device for data offloading in a self-backhauled IAB network, applied to a second CU in a second IAB network, characterized in that: include: A first determining module is configured to determine backhaul adaptation protocol BAP configuration information when receiving a data packet of offloaded data from a first centralized unit CU in a first IAB network, wherein the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network; A first configuration module, configured to configure, based on the BAP configuration information, a second donor distributed unit in the second IAB network to transmit the data packet to a first IAB node in the first IAB network through a backhaul path in the second IAB network, wherein the first IAB node is a shunt node; Wherein, the device for data offloading in the self-backhaul IAB network further includes: A first receiving module is used to receive configuration information sent by the first CU before determining the BAP configuration information, wherein the configuration information is used to determine the BAP configuration information, and the configuration information includes at least one of the following: BAP address information of the first IAB node, routing information of the diverted data in the first IAB network, and quality of service QoS parameters of the service corresponding to the diverted data.

13. The device according to claim 12, characterized in that The first determining module comprises: a first configuration unit, configured to configure parameter information of the offloaded data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node, and a mapping relationship of a backhaul logical channel; A second configuration unit is used to configure routing configuration information of the diverted data in the first IAB network according to the configuration information, wherein the routing configuration information includes at least one of the following: routing information from the first IAB node to the destination IAB node, a mapping relationship of the return logical channel, and a quality of service QoS parameter of the service corresponding to the diverted data.

14. The device according to claim 12, characterized in that In a case where the data packet carries first BAP header information of the data packet in the first IAB network, the first determining module includes: a third configuration unit, configured to configure parameter information of the offloaded data in the second IAB network according to the configuration information, wherein the parameter information includes at least one of the following: routing information between the second donor DU and the first IAB node in the second IAB network, a mapping relationship of a backhaul logical channel, and a quality of service QoS parameter of a service corresponding to the offloaded data; A determining unit is configured to determine second BAP header information of the data packet in the second IAB network according to the parameter information.

15. The device according to claim 14, characterized in that The device also includes: A processing module is used to read and remove the first BAP header information from the data packet to restore the data packet.

16. The device according to claim 14, characterized in that The device also includes: A second configuration module is used to configure the second donor DU to add target BAP header information to the data packet to form a BAP protocol data unit PDU based on the BAP configuration information after determining the BAP configuration information, wherein the target BAP header information includes the first BAP header information and the second BAP header information.

17. The device according to claim 14, characterized in that The routing configuration information of the offloaded data in the first IAB network includes a destination address and BAP packet header information corresponding to the destination address in the first IAB network.

18. A device for data offloading in a self-backhauled IAB network, applied to a second donor DU in a second IAB network, characterized in that: include: A second determining module is used to determine first BAP header information and second BAP header information, wherein the first BAP header information is used to indicate routing information of a data packet of the offloaded data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet in the second IAB network; A second receiving module, configured to receive a data packet of offloaded data sent by a first CU in the first IAB network or a second CU in the second IAB network; A transmission module is configured to transmit the data packet to a first IAB node in the first IAB network through a second IAB node in the second IAB network based on the second BAP header information, wherein the first IAB node is a shunt node.

19. A device for data offloading in a self-backhauled IAB network, applied to a first CU in a first IAB network, characterized in that: include: A first sending module, configured to send configuration information to a second CU in a second IAB network; A second sending module, configured to send a data packet of offloaded data to the second CU or the second donor DU in the second IAB network; The configuration information is used to determine backhaul adaptation protocol BAP configuration information, and the BAP configuration information is used to generate routing information of the data packet in the first IAB network and the second IAB network.

20. The device according to claim 19, characterized in that The configuration information includes at least one of the following: information of a first IAB node in the first IAB network, routing mapping information of the offloaded data in the first IAB network, and QoS parameters of a service corresponding to the offloaded data; The first IAB node is a distribution node.

21. A device for data distribution in a self-backhauled IAB network, applied to a first IAB node in a first IAB network, wherein the first IAB node is a distribution node, characterized in that: include: a third receiving module, configured to receive a data packet of the diverted data transmitted by the second IAB node in the second IAB network; wherein the data packet carries the second BAP header information and the first BAP header information, and the destination address indicated by the second BAP header information is the BAP address of the first IAB node; The third determining module is configured to determine whether to forward the data packet in the first IAB network according to the first BAP packet header information.

22. The device according to claim 21, characterized in that The third determination module comprises: a first processing unit, configured to, when the destination address carried by the first BAP header information matches the address of the first IAB node, remove the first BAP header information and the second BAP header information from the data packet, and submit the processed data packet of the offloaded data to an upper layer; a second processing unit, configured to, when a destination address carried by the first BAP header information does not match the address of the first IAB node, remove the second BAP header from the data packet, and forward the processed data packet according to the first BAP header information; The first BAP header information is used to indicate routing information of the data packet of the diverted data in the first IAB network, and the second BAP header information is used to indicate routing information of the data packet of the diverted data in the second IAB network.

23. A network side device, characterized in that: The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the method steps according to any one of claims 1 to 6, or implements the method steps according to claim 7, or implements the method steps according to any one of claims 8 to 9, or implements the method steps according to any one of claims 10 to 11.

24. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the method steps as described in any one of claims 1 to 6, or implements the method steps as described in claim 7, or implements the method steps as described in any one of claims 8 to 9, or implements the method steps as described in any one of claims 10 to 11.

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