CN115175249A - Data transmission method in IAB network, IAB node and storage medium - Google Patents

Abstract

The embodiment of the application provides a data transmission method, an IAB node and a storage medium in an access and return integrated IAB network, and relates to the technical field of communication. The method comprises the following steps: receiving a first data packet from a first IAB donor node; obtaining a second data packet containing first BAP header information and second BAP header information based on the first data packet; determining a routing path of a second data packet and transmitting the second data packet according to the first BAP header information and the second BAP header information; the first BAP header information is used to indicate a routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate a routing path from the second IAB host node to the first IAB node. According to the embodiment of the application, in the downlink data transmission process in the inter-CU, when the data volume is large or switching is needed, the data can be distributed to paths under different CUs, so that the problem of data interruption in the inter-CU can be effectively reduced, and meanwhile, the possibility of load balancing is increased.

Description

Method for data transmission in IAB network, IAB node and storage medium

technical field

The present application relates to the field of communication technologies, and in particular, the present application relates to a method for data transmission in an IAB network, an IAB node and a storage medium.

Background technique

Integrated Access and Backhaul (IAB for short) technology enables one or more IAB nodes to connect to the parent node as a parent node's UE through its local access resources, and form a multi-hop network on this basis. The wireless self-backhaul network provides backhaul connectivity for locally accessed UEs of the IAB node.

In the deployment of the IAB network, it consists of an IAB host node or a central control node (IAB donor), an IAB node (IABnode) and a UE. The IAB donor is used to connect the core network, transmit the information of the IAB node and the UE back to the core network, and transmit the information of the core network to the IAB node and the UE. IAB donors are also responsible for managing IAB nodes throughout the IAB network.

An IAB donor can be an access network element with complete base station functions, such as a donor base station DgNB, or an access network in the form of a separate centralized unit (CU) and distributed unit (DU) network element.

Currently, in the IAB network, only downlink data transmission is supported through the path under the intra-CU. In the inter-CU scenario, the data packet is not supported for downlink transmission through another path. Therefore, when the amount of data is large or switching is required, intra-CU load balancing can only distribute data to different paths under the same CU, resulting in longer data transmission time or serious data interruption during switching. .

SUMMARY OF THE INVENTION

The present application provides a method for data transmission in an IAB network, an IAB node and a computer-readable storage medium, which are used to solve the problem that when the amount of data is large or switching is required, the load balancing of intra-CU can only distribute data to On different paths under the same CU, the data transmission time is long, or the technical problem of severe data interruption during switching.

A first aspect provides a method for data transmission in an integrated IAB network for access and backhaul, applied to a second IAB host node, the method comprising:

receiving the first data packet from the first IAB host node;

obtaining a second data packet based on the first data packet, where the second data packet includes the BAP header information of the first adaptive backhaul protocol and the second BAP packet header information;

Determine the routing path of the second data packet according to the first BAP packet header information and the second BAP packet header information; transmit the second data packet according to the routing path;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the route from the second IAB host node to the second IAB host node. A routing path between IAB nodes.

In a possible implementation manner, the obtaining a second data packet based on the first data packet includes:

If the first data packet includes first BAP header information, based on the second routing information, add second BAP header information to the first data packet to obtain the second data packet, the second routing information Used to characterize the routing path from the second IAB host node to the first IAB node.

In yet another possible implementation, the first IAB host node includes a first centralized unit CU, and the second IAB host node further includes a second CU;

Receiving the first data packet from the first IAB host node specifically includes:

receiving the first data packet transmitted by the first CU through the IP layer; or,

receiving the first data packet transmitted by the first CU through the F1 interface with the first CU; or,

The first data packet transmitted by the second CU is received through the F1 interface.

In yet another possible implementation, receiving the first data packet from the first IAB host node specifically includes:

receiving the mapping-related parameters and the first data packet from the first IAB host node;

Described, based on the first data packet, obtaining the second data packet including the first BAP packet header information and the second BAP packet header information, including:

If the first data packet does not include first BAP header information, first routing information is determined according to the mapping-related parameters, and first BAP header information is added to the first data packet based on the first routing information , to obtain the added data packet, and the first routing information is used to represent the routing path from the first IAB node to the second IAB node;

The second BAP header information is added to the added data packet based on the second routing information to obtain the second data packet, and the second routing information is used to represent the path from the second IAB host node to the first IAB node routing paths between.

In yet another possible implementation, the first IAB host node includes a first CU, and receives mapping-related parameters and a first data packet from the first IAB host node, including:

Receive the first data packet and the mapping-related parameters transmitted by the first CU through the F1 interface with the first CU; or,

receiving the first data packet and the mapping-related parameters transmitted by the first CU through the IP layer; or,

The first data packet and the mapping-related parameter transmitted by the second CU are received through the F1 interface.

In yet another possible implementation manner, the first IAB node is an IAB node jointly managed by the first IAB host node and the second IAB host node.

In a second aspect, a method for data transmission in an IAB network is provided, applied to the first IAB host node, and the method includes:

determining the second IAB host node;

sending a first data packet to the second IAB host node, so that the second IAB host node obtains a second data packet based on the first data packet, and transmits the second data packet;

Wherein, the second data packet includes first BAP packet header information and second BAP packet header information, the first BAP packet header information is used to indicate the routing path from the first IAB node to the second IAB node, the The second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node.

In a third aspect, a method for data transmission in an IAB network is provided, which is applied to a child node of a second IAB host node, and the method includes:

Parsing the BAP header information of the second data packet from the second IAB host node, wherein the second data packet includes the first BAP packet header information and the second BAP packet header information;

Determine the first IAB node based on the second BAP packet header information obtained by parsing, and the first IAB node is the node of the destination corresponding to the second BAP packet header information;

Transmit the parsed data packet including the first BAP header information to the first IAB node, so that the first IAB node will remove the first BAP header information based on the first BAP header information. The data packet is transmitted to the second IAB node, and the second IAB node is the node of the destination corresponding to the first BAP header information;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the route from the second IAB host node to the second IAB node. Describe the routing path between the first IAB nodes.

In a fourth aspect, an IAB host node is provided, including:

memory for storing computer programs;

a transceiver for sending and receiving data under the control of the processor;

The processor is configured to read the computer program in the memory and implement the method for data transmission in the IAB network shown in the first aspect of the present application when executing the claims.

In a fifth aspect, an IAB host node is provided, including:

memory for storing computer programs;

a transceiver for sending and receiving data under the control of the processor;

A processor for reading the computer program in the memory and performing the following operations:

determining the second IAB host node;

sending a first data packet to the second IAB host node, so that the second IAB host node obtains a second data packet based on the first data packet, and transmits the second data packet;

Wherein, the second data packet includes first BAP packet header information and second BAP packet header information, the first BAP packet header information is used to indicate a routing path from the first IAB node to the second IAB node, the second The BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node.

In a sixth aspect, an integrated IAB node for access and backhaul is provided, including:

memory for storing computer programs;

a transceiver for sending and receiving data under the control of the processor;

A processor for reading the computer program in the memory and performing the following operations:

Parsing the BAP header information of the second data packet from the second IAB host node, wherein the second data packet includes the first BAP packet header information and the second BAP packet header information;

Determine the first IAB node based on the second BAP packet header information obtained by parsing, and the first IAB node is the node of the destination corresponding to the second BAP packet header information;

Transmit the parsed data packet including the first BAP header information to the first IAB node, so that the first IAB node will remove the first BAP header information based on the first BAP header information. The data packet is transmitted to the second IAB node, and the second IAB node is the node of the destination corresponding to the first BAP header information;

The first BAP header information is used to indicate a routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the route from the second IAB host node to the second IAB node Routing paths between the first IAB nodes.

In a seventh aspect, an IAB host node is provided, including:

a receiving module for receiving the first data packet from the first IAB host node;

a processing module, configured to obtain a second data packet based on the first data packet, where the second data packet includes the first adaptive backhaul protocol BAP header information and the second BAP packet header information; according to the first BAP Packet header information and the second BAP packet header information, determine the routing path of the second data packet; transmit the second data packet according to the routing path;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the route from the second IAB host node to the second IAB host node. A routing path between IAB nodes.

In an eighth aspect, an IAB host node is provided, including:

a determining module for determining the second IAB host node;

a sending module, configured to send a first data packet to the second IAB host node, so that the second IAB host node obtains a second data packet based on the first data packet, and transmits the second data packet;

Wherein, the second data packet includes first BAP packet header information and second BAP packet header information, the first BAP packet header information is used to indicate the routing path from the first IAB node to the second IAB node, the The second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node.

A ninth aspect provides an integrated IAB node for access and backhaul, including:

A processing module, configured to parse the BAP header information of the second data packet from the second IAB host node, and determine the first IAB node based on the second BAP packet header information obtained by parsing, wherein the second data packet contains The first BAP packet header information and the second BAP packet header information, the first IAB node is the node of the destination corresponding to the second BAP packet header information;

A sending module, configured to transmit the parsed data packet including the first BAP packet header information to the first IAB node, so that the first IAB node will remove the first BAP packet header information based on the first BAP packet header information. A data packet of BAP header information is transmitted to a second IAB node, and the second IAB node is the node of the destination corresponding to the first BAP header information;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the route from the second IAB host node to the second IAB node. Describe the routing path between the first IAB nodes.

A tenth aspect provides a processor-readable storage medium, where a computer program is stored on the processor-readable storage medium, and when the computer program is executed by the processor, the first aspect, the second aspect or the third aspect of the present application is implemented The method of data transmission in the IAB network shown.

The beneficial effects brought by the technical solution provided by the application are:

By adding two layers of BAP headers to the data packets, the downlink data transmission under the inter-CU is realized. When the amount of data is large or switching is required, the data can be distributed to the paths under different CUs, which can effectively reduce the inter-CU. The problem of data interruption in the CU, at the same time, increases the possibility of load balancing.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present application.

Fig. 1 is the IAB network topology structure diagram;

Fig. 2 is the structure diagram of each node in the IAB network;

Fig. 3 is the topology structure diagram of intra-CU in the IAB network;

4 is a topology diagram of an inter-CU in an IAB network provided by an embodiment of the present application;

5 is a schematic flowchart of a data transmission method in an IAB network provided by an embodiment of the present application;

6 is a schematic flowchart of a data transmission method in an IAB network provided by another embodiment of the present application;

7 is a schematic flowchart of a data transmission method in an IAB network provided by another embodiment of the present application;

8 is an interaction process diagram of a data transmission method in an IAB network provided by an embodiment of the present application;

9 is an interaction process diagram of a data transmission method in an IAB network provided by another embodiment of the present application;

10 is an interaction process diagram of a data transmission method in an IAB network provided by another embodiment of the present application;

11 is an interaction process diagram of a data transmission method in an IAB network provided by another embodiment of the application;

12 is a schematic structural diagram of an IAB host node according to an embodiment of the present application;

13 is a schematic structural diagram of an IAB host node according to an embodiment of the present application;

14 is a schematic structural diagram of an IAB host node according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of an IAB node according to an embodiment of the present application.

Detailed ways

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but not to be construed as limiting the present invention.

It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the specification of this application refers to the presence of the stated features, integers, steps, operations, elements and/or components, but does not preclude the presence or addition of one or more other features, Integers, steps, operations, elements, components and/or groups thereof. It will be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Furthermore, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combination of one or more of the associated listed items.

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The technical solutions provided in the embodiments of the present application can be applied to various systems, especially 5G systems. For example, applicable systems may be global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) general packet radio Service (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, advanced long-term Evolution (long term evolution advanced, LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. . These various systems include terminal equipment and network side equipment. The system may also include a core network part, such as an evolved packet system (Evloved Packet System, EPS), a 5G system (5GS), and the like.

First of all, some terms involved in this application are introduced and explained:

The terminal device involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called user equipment (User Equipment, UE). Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN). "telephone) and computers with mobile terminal equipment, eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants, PDA) and other devices. A wireless terminal device may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, A remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device) are not limited in the embodiments of the present application.

The IAB network topology is shown in Figure 1. In the IAB network deployment, it consists of an IAB host node or a central control node (IABdonor), an IAB node (IAB node) and a UE. The IAB donor is used to connect the core network, transmit the information of the IAB node and the UE back to the core network, and transmit the information of the core network to the IAB node and the UE. IAB donors are also responsible for managing IAB nodes throughout the IAB network.

It can be understood that an IAB donor may be an access network element with a complete base station function, such as a donor base station DgNB, or may be a separate form of a centralized unit (CU) and a distributed unit (DU). The access network element, the IAB donor is connected to the core network (eg, connected to the 5G core network) network element serving the terminal equipment, and provides wireless backhaul for the IAB node. For ease of expression, the centralized unit of the IAB host node is abbreviated as donor CU, and the distributed unit of the IAB host node is abbreviated as donor DU. The donor CU may also be the control plane (CP) and user plane (user plane). plane, UP) separated form, for example, a CU may consist of one CU-CP and one (or more) CU-UP.

The IAB node relays and transmits the information of the UE to the IAB donor through the wireless link (Uu interface), and relays and transmits the information of the IABdonor to the UE. Between IAB nodes, and between IAB nodes and IAB donors are connected by wireless links.

In the existing IAB network topology, each IAB node consists of two parts, as shown in Figure 2, one part is the IAB Mobile Terminal (IAB Mobile Termination, IAB MT) pair connected to the base station or the distributed unit in the upper-level IAB node The DU part, the base station or the IAB node is called its parent node; the other part is the MT part of the IAB Distributed Unit (IAB Distributed Unit, IAB DU) connected to the UE or the lower-level IAB node, and the UE or IAB MT node is called the child. node.

As shown in FIG. 1 , IAB node 1 is the parent node of IAB node 2, IAB node 3 is the child node of IAB node 2, and IAB node 3 is the descendant node of IAB node 1.

The IAB node introduces an adaptive backhaul protocol layer (Backhaul Adaptation Protocol, BAP) to realize the relay function, and the BAP layer undertakes the routing and the BH RLC channel mapping function of the IAB node egress and ingress. The PDCP layer of the terminal and the PDCP layer of the IABdonor are peer entities.

As shown in Figure 2, the BAP layer is located in the UE's parent node MT (IAB node 2 in Figure 2) and all nodes on all intermediate paths, as well as in the donor DU. The UE here can also be a separate IAB MT. Usually, after the donor CU receives the data from the upper-layer core network, it sends the data packet to the donor DU, and then adds a BAP header to the data packet in the donor DU.

The BAP packet header has a total of 24 bits, of which 1 bit D/C indicates whether the type of the BAP packet is data (data) or control (control), 3 Rs are reserved bits, 10bit destination address and 10bit routing path identifier path ID.

Currently, the IAB network only supports downlink data transmission through the path under the intra-CU, which has great limitations. As shown in FIG. 3 , when the amount of data transmitted to the UE through the path (leg1) is large or needs to be switched, the prior art only transfers the data to the UE through the path (leg2) in the intra-CU. That is to say, the load balancing of intra-CU can only offload data to different paths under the same CU. As a result, the data transmission time is longer, or the data is interrupted when switching.

To this end, a method for data transmission in an IAB network provided by an embodiment of the present application extends the application scenario of intra-CU to inter-CU (as shown in FIG. 4 ), and proposes to implement inter-CU through a 2-layer BAP header. Data transmission under the CU, so that the downlink data can be transmitted to the UE or the IAB-MT through the path under the inter-CU, which effectively reduces the problem of data interruption in the inter-CU, and can shorten the data transmission time. During the switching process, data can be transmitted from leg2 (as shown in Figure 4 ), that is, data can be distributed to paths under different CUs, which increases the possibility of load balancing and is more flexible.

The present invention aims to realize the transmission of downlink data from leg2 as shown in FIG. 4 .

An edge node is a node belonging to two CUs (donor1-CU and donor2-CU) topology at the same time, that is, the node is jointly managed by two CUs, such as IAB node 3 in FIG. 4 . Among them, donor1 is the first IAB host node hereinafter, which receives data from the core network, and donor2 is the second IAB host node hereinafter.

The network topologies managed by donor1-CU (donor CU1 or first CU hereinafter) and donor2-CU (donor CU2 or second CU hereinafter) do not interfere with each other, and only edge node IAB node 3 has two BAP addresses, One is configured by donor CU1 and the other is configured by donor CU2. Descendant nodes (IAB node 4, IAB node 5) and UE only belong to donor CU1, and the descendant nodes only have the BAP address allocated by donor CU1. The donor CU1 receives data from the core network. That is to say, donor CU2 does not know the existence of descendant nodes and UEs, but only knows that IAB node3 belongs to itself.

The donor CU1 and the donor CU2 negotiate the amount of data to be transmitted through the donor CU2, the QOS required for data transmission and other information. The donor CU2 determines whether the corresponding data transmission can be carried out according to the information provided by the donor CU1, and provides the necessary data for the data transmission. resources, and configure routing information, ingress and egress BH RLC channels (ingress BH RLC channel and egress BH RLC channel).

The route between the donor CU2 and the edge node is performed through the second routing information configured by the donor CU2, and the route between the edge node and its descendant node MT or terminal is performed through the first routing information configured by the donor CU1.

Specifically: the data packet has two layers of BAP headers, and the inner BAP header (the first BAP header in the following) carries the routing information (the first routing information in the following) configured by the donorCU1, and the routing information includes: and the destination node of the data packet The corresponding destination BAP address (destination BAP address, hereinafter the first destination address) and path ID (path ID, hereinafter the first routing path identifier); the outer BAP header (hereinafter the second BAP header) carries the donor CU2 configuration The routing information (hereinafter the second routing information), the routing information includes: the destination BAP address (destination BAP address, hereinafter the second destination address) and the path ID (path ID (path ID) corresponding to the edge node or the parent node of the edge node , hereinafter the second routing path identification).

Among them, the adding methods of the two-layer BAP header include:

The first way: Donor DU1 adds the inner BAP header, and donor DU2 adds the outer BAP header. Specifically, donor CU1 directly forwards the data packet with the inner BAP header added or forwards it to donorDU2 through donor CU2, and then donor DU2 adds the outer BAP header;

The second way: donor DU2 receives two routing configurations, and donor DU2 adds two layers of BAP headers. specific,

Routing configuration 1 is the routing configuration of donor CU1. Donor CU1 directly forwards the mapping-related parameters (for example: IP to layer 2 mapping relationship) together with the data packet or forwards it to donor DU2 through donor CU2. The mapping-related parameters include BAP routing. ID (BAP routing ID), namely: the first routing path identifier and the first destination address in the routing configuration 1. That is to say, the first routing information may be carried in the mapping-related parameters and sent to the donor DU2.

Routing configuration 2 is the routing configuration of donor CU2, including: a second routing path identifier and a second destination address. Donor DU2 adds two layers of BAP headers according to routing configuration 1 and routing configuration 2.

The transmission process of data packets includes:

Step1: The outer BAP header is used for routing data packets from donor DU2 to edge nodes. The IAB node between the donor DU2 and the edge node routes the data packet to the edge node through the outer BAP header, and removes the outer BAP header after reaching the node with the target BAP address, where the node with the target BAP address (the first one in the following) IAB nodes) can be edge nodes or parent nodes of edge nodes.

Step 2: The inner BAP header is used for the routing of data packets from the edge node to the descendant node MT or terminal under the edge node. The node between the edge node and the descendant node MT or the terminal sends the data packet to the corresponding descendant node MT (the second IAB node hereinafter) or the terminal through the inner BAP header.

The technical solutions of the present application and how the technical solutions of the present application solve the above-mentioned technical problems will be described in detail below with specific examples. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

An embodiment of the present application provides a method for data transmission in an IAB network. As shown in FIG. 5 , the method is applied to the second IAB host node, and can be executed by the second distributed unit DU of the second IAB host node. Methods include:

S101, receiving a first data packet from a first IAB host node;

S102, based on the first data packet, obtain a second data packet, where the second data packet includes the first adaptive backhaul protocol BAP packet header information and the data packet of the second BAP packet header information;

S103, determine the routing path of the second data packet according to the first BAP packet header information and the second BAP packet header information; transmit the second data packet according to the routing path;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node .

Specifically, in this embodiment, the first BAP header information includes: a first routing path identifier and a first destination address, where the first destination address is the BAP address of the second IAB node;

The second BAP packet header information includes: a second routing path identifier and a second destination address, where the first destination address is the BAP address of the first IAB node.

The first IAB node is a child node of the second IAB host node, and is an IAB node jointly managed by the first IAB host node and the second IAB host node, or an IAB jointly managed by the first IAB host node and the second IAB host node The parent node of the node.

That is to say, in the embodiment of the present application, the downlink data transmission under the inter-CU is realized by adding two layers of BAP headers to the data packets. When the amount of data is large or switching is required, the data can be offloaded to paths under different CUs. Therefore, the problem of data interruption in the inter-CU can be effectively reduced, and at the same time, the possibility of load balancing is increased.

In some embodiments, S102 may specifically include:

If the first data packet includes the first BAP header information, based on the second routing information, add the second BAP header information to the first data packet to obtain the second data packet, and the second routing information is used to represent the host from the second IAB host The routing path between the node and the first IAB node, and the second routing information includes: a second routing path identifier and a second destination address.

Specifically, in this embodiment, the first IAB host node includes a first centralized unit CU, the second IAB host node further includes a second CU, and S101 may include:

receiving the first data packet transmitted by the first CU through the IP layer; or

receive the first data packet transmitted by the first CU through the F1 interface with the first CU; or

The first data packet transmitted by the second CU is received through the F1 interface.

That is to say, in this embodiment, the data packet from the first IAB host node already contains a layer of BAP header, and the second IAB host node adds a second layer of BAP header to the data packet based on the pre-negotiated routing information Then, based on the routing information, the data packets are transmitted to the nodes on the routing path.

In other embodiments, S101 may specifically include:

receiving the mapping-related parameters and the first data packet from the first IAB host node;

S102 may specifically include:

If the first data packet does not include the first BAP header information, the first routing information is determined according to the mapping-related parameters, and the first BAP packet header information is added to the first data packet based on the first routing information to obtain the added data packet, The first routing information is used to represent the routing path from the first IAB node to the second IAB node, and the first routing information includes: a first routing path identifier and a first destination address;

The second BAP header information is added to the added data packet based on the second routing information to obtain the second data packet. The second routing information is used to represent the routing path from the second IAB host node to the first IAB node. The routing information includes: a second routing path identifier and a second destination address.

Specifically, in this embodiment, the first IAB host node includes a first centralized unit CU and a first DU, the second IAB host node further includes a second CU, and receives the mapping-related parameters and the first IAB host node from the first IAB host node. A packet, including:

Receive the first data packet and mapping-related parameters transmitted by the first CU through the F1 interface with the first CU; or,

Receive the first data packet and mapping-related parameters transmitted by the first CU through the IP layer; or,

The first data packet and mapping related parameters transmitted by the second CU are received through the F1 interface.

That is to say, in this embodiment, the data packet from the first IAB host node is the original data packet from the core network, and the second IAB host node is the original data packet based on the first routing information from the first IAB host node. After adding a layer of BAP header, add a second layer of BAP header to the data packet based on the second routing information negotiated in advance, and then transmit the data packet to the nodes on the routing path.

The embodiment of the present application also provides a method for data transmission in an IAB network, the method is applied to the second centralized unit CU of the second IAB host node, and the method includes:

A first data packet from a first IAB host node is received.

Specifically, in this embodiment, the first IAB host node includes the first CU and the first DU, and when the first data packet contains the data packet of the first BAP header information, the first data packet is received in any of the following ways :

Receive the first data packet transmitted by the first CU through the Xn interface, and transmit it to the second DU through the F1 interface;

Receive the first data packet transmitted by the first DU through the IP layer, and transmit it to the second DU through the F1 interface.

Or, when the first data packet is the original data packet, the first data packet and the first routing information transmitted by the first CU through the Xn interface are received, and transmitted to the second DU through the F1 interface.

To sum up, the embodiments of the present application may provide various data receiving manners.

The technical solution of the method for data transmission in an IAB network provided by the embodiment of the present application is described above from the perspective of the second IAB host node in conjunction with FIG. 5 , and the present invention is described below in conjunction with FIG. The technical solutions of a method for data transmission in an IAB network provided by the application embodiments.

The embodiment of the present application also provides a method for data transmission in an IAB network. The method is applied to the first IAB host node. As shown in FIG. 6 , the method includes:

S201. Determine the second IAB host node;

S202, sending the first data packet to the second IAB host node, so that the second IAB host node obtains the second data packet based on the first data packet, and transmits the second data packet;

Wherein, the second data packet contains first BAP packet header information and second BAP packet header information, the first BAP packet header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP packet header information is used for to indicate the routing path from the second IAB host node to the first IAB node.

Specifically, in this embodiment, when it is necessary to perform handover or perform balanced data transmission, a second IAB host node is determined, so as to realize data offloading. The second IAB host node manages the same IAB node as the first IAB host node.

The embodiment of the present application also provides a method for data transmission in an IAB network, the method is applied to the first DU of the first IAB host node, and the method includes:

Send the first data packet including the first BAP packet header information to the second IAB host node.

Specifically, in this embodiment, the first IAB host node further includes a first CU, and the second IAB host node includes a second CU and a second DU,

Send the first data packet to the second IAB host node in any of the following ways:

The first data packet is transmitted to the first CU through the F1 interface, the first CU is transmitted to the second CU through the Xn interface, and the second CU is transmitted to the second DU through the F1 interface;

The first data packet is transmitted to the first CU through the F1 interface, and the first CU is transmitted to the second DU through the IP layer;

The first data packet is transmitted to the second CU through the IP layer, and the second CU is transmitted to the second DU through the F1 interface;

The first data packet is transmitted to the first CU through the F1 interface, and the first CU is transmitted to the second DU through the F1 interface with the second DU.

That is to say, in this embodiment, when the data packet including the first BAP header information is sent to the second IAB host node, it can be implemented by the DU of the first IAB host node, and the data packet can be implemented in various ways. of sending.

In some embodiments, it also includes:

Receive the mapping-related parameters and the data packet sent by the first CU, and add first BAP header information to the data packet according to the first routing information determined by the mapping-related parameters to obtain the first data packet, where the first routing information includes: Routing path identifier and first destination address.

That is, in this embodiment, the first DU may determine the first routing information based on the mapping-related parameters transmitted by the first CU, and add the first BAP header to the data packet based on the first routing information. Specifically, the first routing information may be configured based on the routing information table, IP header information, and backhaul (Backhaul, BH) information included in the mapping-related parameters.

The embodiment of the present application also provides a method for data transmission in an IAB network, the method is applied to the first CU of the first IAB host node, and the method includes:

Send the data packet to be transmitted and the mapping-related parameters to the second IAB host node, so that the second IAB host node adds the first BAP header information to the data packet according to the first routing information determined by the mapping-related parameters, and the first routing information includes: A routing path identifier and a first destination address.

Specifically, in this embodiment, the second IAB host node includes a second CU and a second DU, and sends the data packet to be transmitted and mapping-related parameters to the second IAB host node, including any of the following methods:

The data packet and mapping-related parameters are transmitted to the second CU through the Xn interface, and the second CU is transmitted to the second DU through the F1 interface;

transmitting the data packet and mapping-related parameters to the second DU through the F1 interface with the second DU;

The data packet and mapping-related parameters are transmitted to the second DU through the IP layer.

That is to say, in this embodiment, when the original data packet is sent to the second IAB host node, it can be implemented by the CU of the first IAB host node, and the routing information of the first IAB host node is also required, which can be implemented through various methods. way to realize the sending of data packets and routing information.

In some embodiments, the first IAB host node further includes the first DU, further including:

Send the data packet from the core network and the mapping-related parameters to the first DU, so that the first DU adds the first BAP header information to the data packet according to the first routing information determined by the mapping-related parameters.

The technical scheme of the method for data transmission in an IAB network provided by the embodiment of the present application is described from the perspectives of the second IAB host node and the first IAB host node. The technical solution of a method for data transmission in an IAB network provided by the embodiments of the present application is described from a perspective.

An embodiment of the present application provides a method for data transmission in an IAB network. The method is applied to a child node of the second IAB host node, that is, the first IAB node. As shown in FIG. 7 , the method includes:

S301, parse the BAP header information of the second data packet from the second IAB host node, wherein the second data packet includes the first BAP packet header information and the second BAP packet header information;

S302, determining the first IAB node based on the second BAP packet header information obtained by parsing, and the first IAB node is the node of the destination corresponding to the second BAP packet header information;

S303: Transmit the parsed data packet including the first BAP header information to the first IAB node, so that the first IAB node transmits the data packet without the first BAP header information to the second IAB node based on the first BAP header information , the second IAB node is the node of the destination corresponding to the first BAP header information;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node .

That is to say, in this embodiment, when the first IAB node receives a data packet containing two BAP headers from the second IAB host node, it can parse the BAP header and determine the second BAP header based on the parsed BAP header information. The IAB node sends a data packet including a BAP header to the second IAB node, so that the second IAB node sends the data packet without the BAP header information to the user equipment or the mobile terminal IAB-MT of the IAB node.

In some embodiments, when the first IAB node is an IAB node jointly managed by the first IAB host node and the second IAB host node, S201 may specifically include:

Analyzing the second BAP header information of the second data packet to obtain the second routing path identifier and the second destination address;

When the second destination address is the BWP address of the IAB node, the second BAP header information is removed from the second data packet, and the first BAP header information of the data packet is parsed to obtain the first routing path identifier and the first destination address. ;

It is determined that the IAB node whose BAP address is the same as the first destination address is the second IAB node, and the path for transmitting the data packet to the second IAB node is determined according to the first routing path identifier.

That is to say, in this embodiment, the first IAB node may be an edge node jointly managed by the first IAB host node and the second IAB host node, and after parsing the second BAP header information of the received data packet, obtain The second routing path identifier and the second destination address, and when the second destination address is the BWP address of the edge node, remove the second BAP header information from the second data packet, and parse the first BAP header information of the data packet , obtain the first routing path identifier and the first destination address, determine the IAB node with the same BAP address and the first destination address as the second IAB node based on the first destination address, and then determine to transmit the data packet to the second IAB node based on the first routing path identifier The routing path of the second IAN node.

In other embodiments, when the first IAB node is the parent node of the IAB node jointly managed by the first IAB host node and the second IAB host node, S201 may specifically include:

Analyzing the second BAP header information of the second data packet to obtain the second routing path identifier and the second destination address;

When the second destination address is the BWP address of the first IAB node, remove the second BAP header information from the data packet, and transmit the data packet to the child node of the first IAB node, so that the child node of the first IAB node can The first BAP header information of the packet is parsed to obtain the first routing path identifier and the first destination address, and the second IAB node is determined based on the first destination address, and the data packet is transmitted to the second IAB node based on the first routing path identifier. path.

That is to say, in this embodiment, the first IAB node may be the parent node of the edge node, and after parsing the second BAP header information of the received data packet, the second routing path identifier and the second destination address are obtained, And when the second destination address is the BWP address of the parent node of the edge node, the second BAP header information is removed from the data packet, and the data packet is transmitted to the edge node, so that the edge node can process the first BAP header information of the data packet. By parsing, the first routing path identifier and the first destination address are obtained, the second IAB node is determined based on the first destination address, and the path for transmitting the data packet to the second IAB node is determined based on the first routing path identifier.

An IAB provided by an embodiment of the present application described above with reference to FIGS. 5-7 respectively from the perspectives of the “second IAB host node”, the “first IAB host node (hereinafter DU1)”, and the “first IAB node” For the technical solution of the method for data transmission in the network, the following describes in detail the implementation process of the method for data transmission in the IAB network provided by the embodiments of the present application from the perspective of information exchange with reference to FIGS. 8-11 . Specifically, the process in which the data packet sent by CU1 reaches UE1 through leg2 in FIG. 4 is described.

Embodiment 1. For the first method in the two-layer BAP header addition method, and the destination address of the BAP header 2 is set as the parent node of the edge node (ie: the first IAB node), combined with FIG. 4 and FIG. 8 . describe. A method for data transmission in an IAB network as shown in Figure 8, comprising:

S401. The donor CU1 receives data packets from the core network.

S402, the donor CU1 sends the data packet and mapping-related parameters to the donor DU1.

S403. The donor DU1 adds a first BAP header (BAP header 1) to the data packet according to the BAP routing information (first routing information) determined by the mapping-related parameters.

The BAP header 1 is the path ID (path 1) and the destination address in the CU1 topology, that is, the first routing path identifier and the first destination address.

According to the routing table of CU1, path 1 is the BAP address of IAB node 3 under CU1, the BAP address of IAB node 4, and the first destination address is the BAP address of IAB node 5.

S404. The donor DU1 sends a first data packet to the donor DU2, where the first data packet includes the first BAP header. Specifically, the sending of the first data packet may be implemented in any of the following manners.

The first way: DU1 is transmitted to CU1 through the F1 interface, then CU1 is passed to CU2 through the Xn interface, and then CU2 is passed to the donor DU2 through the F1 interface.

The second way: DU1 is transmitted to CU1 through the F1 interface, and then CU1 is directly transmitted to the donor DU2 through the IP layer.

The third way: DU1 is directly transmitted to CU2 through the IP layer, and then CU2 is passed to the donor DU2 through the F1 interface.

The fourth way: DU1 is transmitted to CU1 through the F1 interface, and then CU1 is directly transmitted to the donor DU2 through the F1 interface with the donor DU2.

S405. After the first data packet reaches the donor DU2, the donor DU2 adds the second routing information under the CU2 topology to the first data packet according to the requirements of the donor CU1 data packet (eg, QOS requirements, etc.), and assigns the second routing information to the first data packet. The information is added to the BAP header of the first data packet.

It can be referred to as BAP header 2 here, and the BAP header 2 contains the path ID and the destination address, that is, the second routing path identifier and the second destination address.

It should be noted that the current data packet (the second data packet above) is configured with a 2-layer BAP header, and the BAP header 2 is in the outer layer of the BAP header 1, and the BAP header 2 is added after the BAP header 2. In this embodiment, the nodes on the redundant path will not continue parsing after unpacking the 24-bit BAP header, and it is considered that everything after 24 bits is data (data), so the connection between the redundant path and the edge node BAP header 1 will always exist during transmission, but will not be parsed.

S406, the donor DU2 determines the first IAB node according to the second routing path identifier and the second target node.

Specifically, in this embodiment, among the IAB nodes corresponding to the second routing path identifier, the IAB node whose BAP address is the same as the second destination address is determined as the first IAB node.

For example, the second destination address is set to the BAP address of IAB node 2 in Figure 4, and the path ID is set to path2. According to path 2 and the second destination address, the BAP address of the next hop, that is, the BAP address of IAB node 2, can be found. That is, in this embodiment, the next hop address is the second destination address.

S407. The donor DU2 sends the second data packet to the first IAB node.

Specifically, in this embodiment, the first IAB node is the parent node of the edge node in FIG. 8 , and the IABnode 2 in FIG. 4 .

S408: The first IAB node receives the second data packet, and parses the second BAP header information BAPheader2 of the second data packet to obtain the second routing path identifier and the second destination address. When the second destination address is the BWP address of the first IAB node, the BAP header2 is removed from the second data packet.

Specifically, in this embodiment, the data packet reaches the IAB node 2 through the redundant path, and the IAB node 2 deciphers the BAP header (the BAP header 2 is actually deciphered, and the BAP header 1 is not deciphered, and the current IAB node 2 does not know the BAP header 1 The existence of the BAP header only considers the data behind the BAP header) and finds that it is the destination address, so the BAP header BAP header 2 will be removed.

S409: Transmit the first data packet with the BAP header 2 removed to the child node of the first IAB node.

Specifically, in this embodiment, the child nodes of the first IAB node are the edge nodes in FIG. 8 and the IABnode 3 in FIG. 4 . The specific transmission process includes: IAB node 2 transmits the PYH-MAC-RLC of the destination node IAB node 3 through RLC-MAC-PYH. After reaching the RLC, it is found that it can continue to be solved, and the data packet is sent from the RLC to the IAB. Node 3's BAP layer.

S410. The edge node IAB node 3 parses the first BAP header information BAP header1 of the first data packet, obtains the first routing path identifier and the first destination address, and determines the second IAB node based on the first routing path identifier and the first destination address .

Specifically, in this embodiment, among the IAB nodes corresponding to the first routing path identifier, the IAB node whose BAP address is the same as the first destination address is determined as the second IAB node. The second IAB node is the IABnode 5 in FIG. 4 .

S411. The edge node IAB node 3 sends the first data packet to the target node IAB node 5 according to the first routing information.

Specifically, in this embodiment, the data packet arrives at the BAP layer of IAB node 3, starts to decipher the inner BAP header, that is, the BAP header 1 added by donor DU1, and finds that the destination BAP address is the BAP address of IAB node 5, and the path information is IAB node 3-IAB node 4. IAB node 3 will pass the packet through IAB node 4 to IAB node 5.

S412. The second IAB node receives the first data packet and parses the first BAP header information BAPheader1 of the data packet to obtain the first routing path identifier and the first destination address. When the first destination address is the BWP address of the second IAB node, the BAP header1 is removed from the first data packet, and a data packet not including the BAP header is sent to the UE.

Specifically, in this embodiment, after the data packet arrives at IAB node 5, IAB node 5 unpacks the BAP packet and finds that the destination address is itself, throws away the BAP header 1, and then sends the data packet down to RLC-MAC-PYH , and then reach the PYH layer of the UE, the UE will further analyze it, and finally complete the entire process of data transmission.

Embodiment 2: For the first method in the two-layer BAP header adding method, and the destination address of the BAP header 2 is set as the edge node (ie: the first IAB node), it will be described with reference to FIG. 4 and FIG. 9 . The implementation process of S501-S505 included in a method for data transmission in an IAB network as shown in FIG. 9 is similar to the implementation process of S401-S405 in Embodiment 1, and is not repeated here for the sake of brevity of description.

S506, the donor DU2 determines the first IAB node according to the second routing path identifier and the second target node.

Specifically, in this embodiment, among the IAB nodes corresponding to the second routing path identifier, the IAB node whose BAP address is the same as the second destination address is determined as the first IAB node.

For example, the second destination address is set to the BAP address of IAB node 3 in Figure 4, and the path ID is set to path2. According to path 2 and the destination address, the BAP address of the next hop, that is, the BAP address of IAB node 2, can be found. Then, continue to find the BAP address of the next hop according to path 2 and the destination address, and finally reach the destination address IAB node 3.

S507. The donor DU2 sends the second data packet to the first IAB node.

Specifically, in this embodiment, the first IAB node is the IAB node 3 in FIG. 4 .

S508: The first IAB node receives the second data packet, and parses the second BAP header information BAPheader2 of the second data packet to obtain the second routing path identifier and the second destination address. When the second destination address is the BWP address of the first IAB node, the BAP header2 is removed from the second data packet.

Specifically, in this embodiment, after reaching the IAB node 3 through the redundant path, the IAB node 3 unpacks the BAP header (the actual solution is BAP header 2, but the BAP header 1 is not resolved) and finds that it is the destination address, so the BAP will be removed. header 2.

S509. The first IAB node continues to parse the BAP header 1 of the first data packet, obtains the first routing path identifier and the first destination address, and determines the second IAB node based on the first routing path identifier and the first destination address.

Specifically, in this embodiment, among the IAB nodes corresponding to the first routing path identifier, the IAB node whose BAP address is the same as the first destination address is determined as the second IAB node. The second IAB node is the IABnode 5 in FIG. 4 .

That is to say, after removing BAP header 2, the edge node finds that there is still a layer of BAP header, and continues to decipher the BAP header of the inner layer, that is, BAP header 1 added by donor DU1, and finds that the destination BAP address is the BAP address of IAB node 5. , the path information is IAB node 3-IAB node 4. IAB node 3 will pass the BAP packet to IAB node 5 through IAB node 4.

The implementation process of S510-S511 in this embodiment is similar to that of S411-S412 in Embodiment 1, and for the sake of brevity of description, details are not repeated here.

Embodiment 3. For the second method in the two-layer BAP packet header addition method, and the destination address of the BAP header 2 is set as the parent node of the edge node (ie: the first IAB node), combined with FIG. 4 and FIG. 10 . describe. A method for data transmission in an IAB network, as shown in Figure 10, includes:

S601. CU1 receives data packets from the core network.

S602, CU1 sends a data packet and mapping related parameters to DU2.

Specifically, in this embodiment, the mapping-related parameters are used to indicate the mapping relationship between the IP layer and the layer 2. The first data packet is the original data packet from the core network.

Specifically, the sending of the first data packet and the mapping-related parameters may be implemented in any of the following manners.

The first way: CU1 is sent to CU2 through the Xn port, and CU2 is sent to the donor DU2 through the F1 interface.

The second way: CU1 sends to donor DU2 through the F1 interface.

The third way: CU1 directly transmits to donor DU2 through the IP layer.

S603. After the first data packet arrives at the donor DU2, the Donor DU2 determines, according to the mapping-related parameters, that the BAP routing ID of the first routing information under the CU1 is the first data packet plus the BAP header1.

Specifically, in this embodiment, the BAP header 1 includes the path ID (ie, path 1 ) and the destination address in the CU1 topology, that is, the first routing path identifier and the first destination address. According to the routing table of CU1, path 1 is the BAP address of IAB node 3 under CU1, the BAP address of IAB node 4, and the destination address is the BAP address of IAB node 5.

S604, donor DU2 adds the second routing information under the CU2 topology to the first data packet according to the requirements of the donor CU1 data packet (eg, QOS requirements, etc.), and adds the second routing information to the BAP of the first data packet in advance. It can be referred to as BAP header 2 here, and the BAP header 2 contains the path ID and the destination address, that is, the second routing path identifier and the second destination address.

For example, the second destination address is set to the BAP address of IAB node 2 in Figure 4, and the path ID is set to path2. According to path 2 and the second destination address, the BAP address of the next hop, that is, the BAP address of IAB node 2, can be found. That is, in this embodiment, the next hop address is the second destination address.

The implementation process of S605-S610 in this embodiment is similar to that of S407-S412 in Embodiment 1, and is not repeated here for the sake of brevity of description.

Embodiment 4: For the second method in the two-layer BAP header adding method, and the destination address of the BAP header 2 is set as the edge node (ie: the first IAB node), it will be described with reference to FIG. 4 and FIG. 11 . The implementation process of S701-S703 included in a method for data transmission in an IAB network as shown in FIG. 11 is similar to the implementation process of S601-S603 in Embodiment 3, and is not repeated here for the sake of brevity of description.

S704, the donor DU2 adds the second routing information under the CU2 topology to the first data packet according to the requirements of the donor CU1 data packet (eg, QOS requirements, etc.), and adds the second routing information to the BAP of the first data packet in advance. It can be referred to as BAP header 2 here, and the BAP header 2 contains the path ID and the destination address, that is, the second routing path identifier and the second destination address.

For example, the second destination address is set to the BAP address of IAB node 3 in Figure 4, and the path ID is set to path2. According to path 2 and the destination address, the BAP address of the next hop, that is, the BAP address of IAB node 2, can be found. Then, continue to find the BAP address of the next hop according to path 2 and the destination address, and finally reach the destination address IAB node 3.

The implementation process of S705-S709 in this embodiment is similar to that of S507-S511 in the second embodiment, which is not repeated here for the sake of brevity of description.

The technical solutions of a method for data transmission in an IAB network provided by the embodiments of the present application are described in detail above with reference to the accompanying drawings 4-11 . Each unit and/or node of the method for data transmission in the IAB network is described in detail.

The IAB host node shown in FIG. 12 may include: a memory 801, a transceiver 802 and a processor 803, wherein,

The memory 801 is used to store computer programs;

a transceiver 802, configured to receive the first data packet from the first IAB host node under the control of the processor 803;

The processor 803 is used to read the computer program in the memory 801 and perform the following operations:

Based on the first data packet, a second data packet is obtained, and the second data packet includes the first adaptive backhaul protocol BAP packet header information and the second BAP packet header information;

According to the first BAP packet header information and the second BAP packet header information, determine the routing path of the second data packet; transmit the second data packet according to the routing path;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node .

Specifically, in this embodiment, the first IAB node is a child node of the second IAB host node, and is any of the following:

an IAB node jointly managed by the first IAB host node and the second IAB host node;

The parent node of the IAB node jointly managed by the first IAB host node and the second IAB host node.

In some embodiments, the first BAP header information includes: a first routing path identifier and a first destination address, where the first destination address is the BAP address of the second IAB node;

The second BAP packet header information includes: a second routing path identifier and a second destination address, where the first destination address is the BAP address of the first IAB node.

In some embodiments, the processor 803 is specifically configured to, if the first data packet includes the first BAP header information, add the second BAP header information to the first data packet based on the second routing information to obtain the second data packet , the second routing information is used to represent the routing path from the second IAB host node to the first IAB node, and the second routing information includes: a second routing path identifier and a second destination address.

In some embodiments, the first IAB host node includes a first centralized unit CU and a first DU, the second IAB host node further includes a second CU, and the transceiver 802 is further configured to receive the first data packet in any of the following ways :

receiving the first data packet transmitted by the first CU through the IP layer;

Receive the first data packet transmitted by the first CU through the F1 interface with the first CU;

The first data packet transmitted by the second CU is received through the F1 interface.

In some embodiments, the transceiver 802 is specifically configured to receive the mapping-related parameters and the first data packet from the first IAB host node;

The processor 803 is specifically configured to, if the first data packet does not include the first BAP header information, determine the first routing information according to the mapping-related parameters, and add the first BAP packet header information to the first data packet based on the first routing information, The added data packet is obtained, and the first routing information is used to represent the routing path from the first IAB node to the second IAB node, and the first routing information includes: a first routing path identifier and a first destination address;

The second BAP header information is added to the added data packet based on the second routing information to obtain the second data packet. The second routing information is used to represent the routing path from the second IAB host node to the first IAB node. The routing information includes: a second routing path identifier and a second destination address.

In some embodiments, the first IAB host node includes a first centralized unit CU and a first DU, and the transceiver 802 is further configured to receive the mapping-related parameters and the first data packet in any of the following ways:

Receive the first data packet and mapping-related parameters transmitted by the first CU through the F1 interface with the first CU;

receiving the first data packet and mapping related parameters transmitted by the first CU through the IP layer;

The first data packet and mapping related parameters transmitted by the second CU are received through the F1 interface.

The IAB host node in this embodiment is the second IAB host node in the foregoing embodiment, which can execute the methods shown in the foregoing FIG. 5 and 8-11 of the present application, and the implementation principles thereof are similar, which are not described in detail in this embodiment. For the content, reference may be made to the methods provided in the above embodiments. The beneficial effects that can be achieved by the IAB host node provided by the embodiments of the present application are the same as those provided by the methods provided in the above embodiments, which will not be repeated here.

Based on the same inventive concept, an embodiment of the present application also provides a centralized unit CU of an IAB host node including: a memory, a transceiver, and a processor, wherein,

memory for storing computer programs;

a transceiver for receiving the first data packet from the first IAB host node under the control of the processor;

A processor for reading the computer program in the memory and performing control of the transceiver.

In some embodiments, the first IAB host node includes a first centralized unit CU and a first DU, and the transceiver is specifically configured to, when the first data packet contains the data packet of the first BAP header information, pass any one of the following The way to receive the first data packet:

Receive the first data packet transmitted by the first CU through the Xn interface, and transmit it to the second DU through the F1 interface;

Receive the first data packet transmitted by the first DU through the IP layer, and transmit it to the second DU through the F1 interface.

In some embodiments, the first IAB host node includes a first CU and a first DU, and the transceiver is specifically configured to, when the first data packet is an original data packet, receive the first data packet transmitted by the first CU through the Xn interface and the first routing information, and transmitted to the second DU through the F1 interface.

The CU in this embodiment is the second CU in the foregoing embodiments, and can execute the methods shown in the foregoing Figs. For the method provided in the example, the beneficial effects that can be achieved by the CU provided by the embodiment of the present application are the same as those provided by the method provided in the foregoing embodiment, and are not repeated here.

Based on the same inventive concept, an embodiment of the present application also provides an IAB host node, including: a memory, a transceiver, and a processor, wherein,

memory for storing computer programs;

a transceiver, configured to send the first data packet to the second IAB host node under the control of the processor, so that the second IAB host node obtains the second data packet based on the first data packet, and transmits the second data packet;

a processor for determining the second IAB host node;

Wherein, the second data packet contains first BAP packet header information and second BAP packet header information, the first BAP packet header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP packet header information is used for to indicate the routing path from the second IAB host node to the first IAB node.

In some embodiments, a transceiver, configured to send a first data packet including the first BAP header information to the second IAB host node under the control of the processor;

In some embodiments, the first IAB host node further includes a first CU, the second IAB host node includes a second CU and a second DU, and the transceiver is specifically configured to, under the control of the processor, transmit to the The second IAB host node sends the first packet:

The first data packet is transmitted to the first CU through the F1 interface, the first CU is transmitted to the second CU through the Xn interface, and the second CU is transmitted to the second DU through the F1 interface;

The first data packet is transmitted to the first CU through the F1 interface, and the first CU is transmitted to the second DU through the IP layer;

The first data packet is transmitted to the second CU through the IP layer, and the second CU is transmitted to the second DU through the F1 interface;

The first data packet is transmitted to the first CU through the F1 interface, and the first CU is transmitted to the second DU through the F1 interface with the second DU.

In some embodiments, the transceiver is configured to receive mapping-related parameters and data packets sent by the first CU;

The processor is further configured to add the first BAP header information to the data packet according to the first routing information determined by the mapping related parameters to obtain the first data packet, where the first routing information includes: a first routing path identifier and a first destination address .

It should be understood that, in this embodiment, the structure of the IAB host node may refer to the structure of the IAB host node shown in FIG. 12 .

The IAB host node in this embodiment is the first IAB host node in the foregoing embodiment, and can execute the methods shown in the foregoing FIGS. 6 and 8-11 of the present application. For the content, reference may be made to the methods provided in the above embodiments. The beneficial effects that can be achieved by the IAB host node provided by the embodiments of the present application are the same as those provided by the methods provided in the above embodiments, which will not be repeated here.

Based on the same inventive concept, an embodiment of the present application also provides a centralized unit CU of an IAB host node, including: a memory, a transceiver, and a processor, wherein,

memory for storing computer programs;

The transceiver is used to send the data packet to be transmitted and the mapping-related parameters to the second IAB host node under the control of the processor, so that the second IAB host node adds the first routing information to the data packet according to the first routing information determined by the mapping-related parameters. BAP header information, the first routing information includes: a first routing path identifier and a first destination address;

A processor for reading the computer program in the memory and performing control of the transceiver.

In some embodiments, the second IAB host node includes a second CU and a second DU, and the transceiver is specifically configured to, under the control of the processor, send data packets and mapping-related data to the second IAB host node in any one of the following manners parameter:

It is transmitted to the second CU through the Xn interface, and the second CU is transmitted to the second DU through the F1 interface;

It is transmitted to the second DU through the F1 interface with the second DU;

It is transmitted to the second DU through the IP layer.

In some embodiments, the first IAB host node further includes a first DU, and the transceiver is further configured to send the data packet from the core network and the mapping-related parameters to the first DU, so that the first DU determines the first DU according to the mapping-related parameters. A routing information adds first BAP header information to the data packet.

The CU in this embodiment is the first CU in the foregoing embodiments, and can execute the methods shown in the foregoing Figs. For the method provided in the example, the beneficial effects that can be achieved by the CU provided by the embodiment of the present application are the same as those provided by the method provided in the foregoing embodiment, and are not repeated here.

Based on the same inventive concept, an embodiment of the present application also provides an IAB node, including: a memory, a transceiver, and a processor, wherein,

memory for storing computer programs;

A processor that reads the computer program in memory and performs the following operations:

Parsing the BAP header information of the second data packet from the second IAB host node, wherein the second data packet includes the first BAP packet header information and the second BAP packet header information;

Determine the first IAB node based on the second BAP packet header information obtained by parsing, and the first IAB node is the node of the destination corresponding to the second BAP packet header information;

a transceiver, configured to transmit the parsed data packet containing the first BAP header information to the first IAB node under the control of the processor, so that the first IAB node will remove the first BAP header information based on the first BAP header information The data packet is transmitted to the second IAB node, and the second IAB node is the node of the destination corresponding to the first BAP header information;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node .

In this embodiment, the first IAB node is a child node of the second second IAB host node.

In some embodiments, when the first IAB node is an IAB node jointly managed by the first IAB host node and the second IAB host node, the processor is specifically configured to:

Analyzing the second BAP header information of the second data packet to obtain the second routing path identifier and the second destination address;

When the second destination address is the BWP address of the first IAB node, remove the second BAP header information from the second data packet, and parse the first BAP header information of the data packet to obtain the first routing path identifier and the first Destination address;

It is determined that the IAB node whose BAP address is the same as the first destination address is the second IAB node, and the path for transmitting the data packet to the second IAB node is determined according to the first routing path identifier.

In some embodiments, when the first IAB node is the parent node of the IAB node jointly managed by the first IAB host node and the second IAB host node, the processor is specifically configured to:

Analyzing the second BAP header information of the second data packet to obtain the second routing path identifier and the second destination address;

When the second destination address is the BWP address of the first IAB node, remove the second BAP header information from the data packet, and transmit the data packet to the child node of the first IAB node, so that the child node of the first IAB node can The first BAP header information of the packet is parsed to obtain the first routing path identifier and the first destination address, and the second IAB node is determined based on the first destination address, and the data packet is transmitted to the second IAB node based on the first routing path identifier. path.

It should be understood that, in this embodiment, the structure of the IAB node may refer to the structure of the IAB host node shown in FIG. 12 .

The IAB node in this embodiment is the first IAB node in the foregoing embodiment, and can execute the methods shown in the foregoing FIG. 7-11 of the present application, and its implementation principle is similar. The beneficial effects that can be achieved by the IAB node provided by the embodiments of the present application are the same as those provided by the methods provided in the foregoing embodiments, and details are not described herein again.

It should be understood that, in the above-described embodiments, the bus architecture in FIG. 12 may include any number of interconnected buses and bridges, specifically various circuit links of one or more processors represented by processor 803 and memory represented by memory 801 together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 802 may be multiple elements, ie, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like.

The processor 803 is responsible for managing the bus architecture and general processing, and the memory 801 may respectively store data used by the processor 803 when performing operations.

Optionally, the processor 803 may be a CPU (central processor), an ASIC (Application Specific Integrated Circuit, application specific integrated circuit), an FPGA (Field-Programmable Gate Array, field programmable gate array) or a CPLD (Complex Programmable Logic Device, Complex Programmable Logic Device), the processor can also use a multi-core architecture.

The processor is configured to execute any method provided by the embodiments of the present application according to the obtained executable instructions by invoking the computer program stored in the memory. The processor and memory may also be physically separated.

Based on the same inventive concept, an embodiment of the present application also provides an IAB host node. As shown in FIG. 13 , the DU includes: a receiving module 901 and a processing module 902, wherein,

a receiving module 901, configured to receive the first data packet from the first IAB host node;

The processing module 902 is configured to obtain a second data packet based on the first data packet, and the second data packet includes the first adaptive backhaul protocol BAP packet header information and the second BAP packet header information; according to the first BAP packet header information and the second BAP packet header information BAP packet header information, determine the routing path of the second data packet; transmit the second data packet according to the routing path;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node .

Specifically, in this embodiment, the first IAB node is a child node of the second IAB host node, and is any of the following:

an IAB node jointly managed by the first IAB host node and the second IAB host node;

The parent node of the IAB node jointly managed by the first IAB host node and the second IAB host node.

In some embodiments, the first BAP header information includes: a first routing path identifier and a first destination address, where the first destination address is the BAP address of the second IAB node;

The second BAP packet header information includes: a second routing path identifier and a second destination address, where the first destination address is the BAP address of the first IAB node.

In some embodiments, the processing module 902 is specifically configured to, if the first data packet includes the first BAP header information, add the second BAP header information to the first data packet based on the second routing information to obtain the second data packet , the second routing information is used to represent the routing path from the second IAB host node to the first IAB node, and the second routing information includes: a second routing path identifier and a second destination address.

In some embodiments, the first IAB host node includes a first centralized unit CU and a first DU, the second IAB host node further includes a second CU, and the receiving module 901 is further configured to receive the first data packet in any of the following manners :

receiving the first data packet transmitted by the first CU through the IP layer;

Receive the first data packet transmitted by the first CU through the F1 interface with the first CU;

The first data packet transmitted by the second CU is received through the F1 interface.

In some embodiments, the receiving module 901 is specifically configured to receive the mapping-related parameters and the first data packet from the first IAB host node;

The processing module 902 is specifically configured to, if the first data packet does not include the first BAP header information, determine the first routing information according to the mapping-related parameters, and add the first BAP packet header information to the first data packet based on the first routing information, The added data packet is obtained, and the first routing information is used to represent the routing path from the first IAB node to the second IAB node, and the first routing information includes: a first routing path identifier and a first destination address;

The second BAP header information is added to the added data packet based on the second routing information to obtain the second data packet. The second routing information is used to represent the routing path from the second IAB host node to the first IAB node. The routing information includes: a second routing path identifier and a second destination address.

In some embodiments, the first IAB host node includes a first centralized unit CU and a first DU, and the receiving module 901 is further configured to receive the mapping-related parameters and the first data packet in any of the following ways:

Receive the first data packet and mapping-related parameters transmitted by the first CU through the F1 interface with the first CU;

receiving the first data packet and mapping related parameters transmitted by the first CU through the IP layer;

The first data packet and mapping related parameters transmitted by the second CU are received through the F1 interface.

The IAB host node in this embodiment is the second IAB host node in the foregoing embodiment, which can execute the methods shown in the foregoing FIG. 5 and 8-11 of the present application, and the implementation principles thereof are similar, which are not described in detail in this embodiment. For the content, reference may be made to the methods provided in the above embodiments. The beneficial effects that can be achieved by the IAB host node provided by the embodiments of the present application are the same as those provided by the methods provided in the above embodiments, which will not be repeated here.

Based on the same inventive concept, an embodiment of the present application further provides a centralized unit CU of an IAB host node, including: a receiving module configured to receive a first data packet from a first IAB host node.

In some embodiments, the first IAB host node includes a first centralized unit CU and a first DU, and when the first data packet includes a data packet of the first BAP header information, the receiving module is specifically configured to use any one of the following methods Receive the first packet:

Receive the first data packet transmitted by the first CU through the Xn interface, and transmit it to the second DU through the F1 interface;

Receive the first data packet transmitted by the first DU through the IP layer, and transmit it to the second DU through the F1 interface.

In some embodiments, the first IAB host node includes a first CU and a first DU, and when the first data packet is an original data packet, the receiving module is specifically configured to receive the first data packet transmitted by the first CU through the Xn interface and the first routing information, and transmitted to the second DU through the F1 interface.

The CU in this embodiment is the second CU in the foregoing embodiments, and can execute the methods shown in the foregoing Figs. For the method provided in the example, the beneficial effects that can be achieved by the CU provided by the embodiment of the present application are the same as those provided by the method provided in the foregoing embodiment, and are not repeated here.

Based on the same inventive concept, an embodiment of the present application also provides an IAB host node, as shown in FIG. 14 , including: a determining module 1001 and a sending module 1002, wherein,

A determination module 1001, configured to determine a second IAB host node;

A sending module 1002, configured to send the first data packet to the second IAB host node, so that the second IAB host node obtains the second data packet based on the first data packet, and transmits the second data packet;

Wherein, the second data packet contains first BAP packet header information and second BAP packet header information, the first BAP packet header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP packet header information is used for to indicate the routing path from the second IAB host node to the first IAB node.

In some embodiments, the sending module 1001 is configured to send the first data packet including the first BAP header information to the second IAB host node.

In some embodiments, the first IAB host node further includes a first CU, the second IAB host node includes a second CU and a second DU, and the sending module 1001 is specifically configured to send to the second IAB host node in any one of the following manners First packet:

The first data packet is transmitted to the first CU through the F1 interface, the first CU is transmitted to the second CU through the Xn interface, and the second CU is transmitted to the second DU through the F1 interface;

The first data packet is transmitted to the first CU through the F1 interface, and the first CU is transmitted to the second DU through the IP layer;

The first data packet is transmitted to the second CU through the IP layer, and the second CU is transmitted to the second DU through the F1 interface;

The first data packet is transmitted to the first CU through the F1 interface, and the first CU is transmitted to the second DU through the F1 interface with the second DU.

In some embodiments, it also includes: a receiving module, wherein,

a receiving module, configured to receive mapping-related parameters and data packets sent by the first CU;

The determining module 1001 is specifically configured to add the first BAP header information to the data packet according to the first routing information determined by the mapping related parameters to obtain the first data packet, wherein the first routing information includes: a first routing path identifier and a first destination address.

The IAB host node in this embodiment is the first IAB host node in the foregoing embodiment, and can execute the methods shown in the foregoing FIGS. 6 and 8-11 of the present application. For the content, reference may be made to the methods provided in the above embodiments. The beneficial effects that can be achieved by the IAB host node provided by the embodiments of the present application are the same as those provided by the methods provided in the above embodiments, which will not be repeated here.

Based on the same inventive concept, an embodiment of the present application also provides a centralized unit CU of an IAB host node, including: a sending module configured to send a data packet to be transmitted and mapping related parameters to a second IAB host node, so that the first The second IAB host node adds first BAP header information to the data packet according to the first routing information determined by the mapping related parameters, where the first routing information includes: a first routing path identifier and a first destination address.

In some embodiments, the second IAB host node includes a second CU and a second DU, and the sending module is specifically configured to send the data packet and mapping-related parameters to the second IAB host node in any of the following ways:

It is transmitted to the second CU through the Xn interface, and the second CU is transmitted to the second DU through the F1 interface;

It is transmitted to the second DU through the F1 interface with the second DU;

It is transmitted to the second DU through the IP layer.

In some embodiments, the first IAB host node further includes a first DU, and further includes a processing module configured to send the data packet from the core network and the mapping-related parameters to the first DU, so that the first DU determines the mapping-related parameters according to the mapping-related parameters. The first routing information adds first BAP header information to the data packet.

The CU in this embodiment is the first CU in the foregoing embodiments, and can execute the methods shown in the foregoing Figs. For the method provided in the example, the beneficial effects that can be achieved by the CU provided by the embodiment of the present application are the same as those provided by the method provided in the foregoing embodiment, and are not repeated here.

Based on the same inventive concept, an embodiment of the present application also provides an IAB node. As shown in FIG. 15 , the IAB node includes: a processing module 1101 and a sending module 1102 , wherein,

The processing module 1101 is configured to parse the BAP header information of the second data packet from the second IAB host node, and determine the first IAB node based on the second BAP packet header information obtained by the analysis, wherein the second data packet includes the first IAB node. One BAP packet header information and the second BAP packet header information, the first IAB node is the node of the destination corresponding to the second BAP packet header information;

The sending module 1102 is used to transmit the parsed data packet containing the first BAP packet header information to the first IAB node, so that the first IAB node transmits the data packet without the first BAP packet header information to the first IAB node based on the first BAP packet header information. The second IAB node, the second IAB node is the node of the destination corresponding to the first BAP header information;

The first BAP header information is used to indicate the routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate the routing path from the second IAB host node to the first IAB node .

In this embodiment, the first IAB node is a child node of the second second IAB host node.

In some embodiments, when the first IAB node is an IAB node jointly managed by the first IAB host node and the second IAB host node, the processing module 1102 is specifically configured to:

Analyzing the second BAP header information of the second data packet to obtain the second routing path identifier and the second destination address;

When the second destination address is the BWP address of the first IAB node, remove the second BAP header information from the second data packet, and parse the first BAP header information of the data packet to obtain the first routing path identifier and the first Destination address;

It is determined that the IAB node whose BAP address is the same as the first destination address is the second IAB node, and the path for transmitting the data packet to the second IAB node is determined according to the first routing path identifier.

In some embodiments, when the first IAB node is the parent node of the IAB node jointly managed by the first IAB host node and the second IAB host node, the processing module 1102 is specifically configured to:

Analyzing the second BAP header information of the second data packet to obtain the second routing path identifier and the second destination address;

When the second destination address is the BWP address of the first IAB node, remove the second BAP header information from the data packet, and transmit the data packet to the child node of the first IAB node, so that the child node of the first IAB node can The first BAP header information of the packet is parsed to obtain the first routing path identifier and the first destination address, and the second IAB node is determined based on the first destination address, and the data packet is transmitted to the second IAB node based on the first routing path identifier. path.

The IAB node in this embodiment is the first IAB node in the foregoing embodiment, and can execute the methods shown in the foregoing FIG. 7-11 of the present application, and its implementation principle is similar. The beneficial effects that can be achieved by the IAB node provided by the embodiments of the present application are the same as those provided by the methods provided in the foregoing embodiments, and details are not described herein again.

Embodiments of the present application provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program runs on the computer, the computer can execute the corresponding content in the foregoing method embodiments. Compared with the prior art, the downlink data transmission under the inter-CU is realized by adding two layers of BAP headers to the data packets. When the amount of data is large or switching is required, the data can be shunted to paths under different CUs. The problem of data interruption in the inter-CU can be effectively reduced, and at the same time, the possibility of load balancing is increased.

It should be understood that although the various steps in the flowchart of the accompanying drawings are sequentially shown in the order indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless explicitly stated herein, the execution of these steps is not strictly limited to the order and may be performed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but may be executed at different times, and the execution sequence is also It does not have to be performed sequentially, but may be performed alternately or alternately with other steps or at least a portion of sub-steps or stages of other steps.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means including the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.

These processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.

The above are only some embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as It is the protection scope of the present invention.

Claims (15)

1. A method for data transmission in an access backhaul integrated IAB network, which is applied to a second IAB host node, and comprises:

receiving a first data packet from a first IAB host node;

obtaining a second data packet based on the first data packet, wherein the second data packet comprises first adaptive backhaul protocol BAP header information and second BAP header information;

determining a routing path of the second data packet according to the first BAP header information and the second BAP header information; transmitting the second data packet according to the routing path;

wherein the first BAP header information is used to indicate a routing path from a first IAB node to a second IAB node, and the second BAP header information is used to indicate a routing path from the second IAB donor node to the first IAB node.

2. The method of claim 1, wherein obtaining a second packet based on the first packet comprises:

and if the first data packet comprises first BAP header information, adding second BAP header information to the first data packet based on second routing information to obtain a second data packet, wherein the second routing information is used for representing a routing path from the second IAB host node to the first IAB node.

3. The method of claim 2, wherein the first IAB host node comprises a first centralized unit, CU, and wherein the second IAB host node further comprises a second CU;

receiving a first data packet from a first IAB donor node, specifically including:

receiving the first data packet transmitted by a first CU through an IP layer; or,

receiving the first data packet transmitted by the first CU through an F1 interface of the first CU; or,

and receiving the first data packet transmitted by the second CU through the F1 interface.

4. The method of claim 1, wherein receiving the first packet from the first IAB donor node comprises:

receiving a mapping-related parameter and a first data packet from a first IAB host node;

obtaining a second data packet based on the first data packet, including:

if the first data packet does not include first BAP header information, determining first routing information according to the mapping related parameters, and adding the first BAP header information to the first data packet based on the first routing information to obtain an added data packet, wherein the first routing information is used for representing a routing path from a first IAB node to a second IAB node;

and adding second BAP header information to the added data packet based on second routing information to obtain the second data packet, wherein the second routing information is used for representing a routing path from the second IAB host node to the first IAB node.

5. The method of claim 4, wherein the first IAB home node comprises a first CU, and wherein the second IAB home node further comprises a second CU;

receiving a mapping-related parameter and a first packet from a first IAB donor node, comprising:

receiving a first data packet and mapping related parameters transmitted by a first CU through an F1 interface between the first CU and the first CU; or,

receiving a first data packet and mapping related parameters transmitted by a first CU through an IP layer; or,

and receiving a first data packet and mapping related parameters transmitted by the second CU through the F1 interface.

6. The method of any of claims 1-5, wherein the first IAB node is an IAB node commonly managed by the first IAB hosting node and the second IAB hosting node.

7. A method for data transmission in an access backhaul integrated IAB network, applied to a first IAB host node, the method comprising:

determining a second IAB host node;

sending a first data packet to the second IAB host node so that the second IAB host node obtains a second data packet based on the first data packet and transmits the second data packet;

the second data packet includes first BAP header information and second BAP header information, where the first BAP header information is used to indicate a routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate a routing path from the second IAB host node to the first IAB node.

8. A method for data transmission in an access backhaul integrated IAB network, which is applied to a child node of a second IAB host node, and comprises the following steps:

analyzing BAP header information of a second data packet from a second IAB host node, wherein the second data packet comprises first BAP header information and second BAP header information;

determining a first IAB node based on the analyzed second BAP header information, wherein the first IAB node is a destination node corresponding to the second BAP header information;

transmitting the analyzed data packet containing the first BAP header information to the first IAB node, so that the first IAB node transmits the data packet without the first BAP header information to a second IAB node based on the first BAP header information, wherein the second IAB node is a destination node corresponding to the first BAP header information;

wherein the first BAP header information indicates a routing path from a first IAB node to the second IAB node, and the second BAP header information indicates a routing path from the second IAB donor node to the first IAB node.

9. An access backhaul integrated IAB host node, comprising:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

a processor for reading the computer program in the memory and performing the method of data transmission in an IAB network of any of claims 1 to 6.

10. An access backhaul integrated IAB host node, comprising:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

a processor for reading the computer program in the memory and performing the following:

determining a second IAB host node;

sending a first data packet to the second IAB host node so that the second IAB host node obtains a second data packet based on the first data packet and transmits the second data packet;

wherein the second data packet comprises first BAP header information and second BAP header information, the first BAP header information is used for indicating a routing path from the first IAB node to the second IAB node, and the second BAP header information is used for indicating a routing path from the second IAB host node to the first IAB node.

11. An access backhaul integrated IAB node, comprising:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

a processor for reading the computer program in the memory and performing the following:

analyzing BAP header information of a second data packet from a second IAB host node, wherein the second data packet comprises first BAP header information and second BAP header information;

determining a first IAB node based on the analyzed second BAP header information, wherein the first IAB node is a destination node corresponding to the second BAP header information;

transmitting the analyzed data packet containing the first BAP header information to the first IAB node, so that the first IAB node transmits the data packet without the first BAP header information to a second IAB node based on the first BAP header information, wherein the second IAB node is a destination node corresponding to the first BAP header information;

wherein the first BAP header information indicates a routing path from a first IAB node to the second IAB node, and the second BAP header information indicates a routing path from the second IAB donor node to the first IAB node.

12. An IAB host node, comprising:

a receiving module, configured to receive a first data packet from a first IAB host node;

a processing module, configured to obtain a second data packet based on the first data packet, where the second data packet includes first adaptive backhaul protocol BAP header information and second BAP header information; determining a routing path of the second data packet according to the first BAP header information and the second BAP header information; transmitting the second data packet according to the routing path;

wherein the first BAP header information is used to indicate a routing path from a first IAB node to a second IAB node, and the second BAP header information is used to indicate a routing path from the second IAB donor node to the first IAB node.

13. An IAB donor node, comprising:

a determining module, configured to determine a second IAB host node;

a sending module, configured to send a first data packet to the second IAB donor node, so that the second IAB donor node obtains a second data packet based on the first data packet, and transmits the second data packet;

the second data packet includes first BAP header information and second BAP header information, where the first BAP header information is used to indicate a routing path from the first IAB node to the second IAB node, and the second BAP header information is used to indicate a routing path from the second IAB host node to the first IAB node.

14. An access backhaul integrated IAB node, comprising:

a processing module, configured to parse BAP header information of a second data packet from a second IAB host node, and determine a first IAB node based on the parsed second BAP header information, where the second data packet includes first BAP header information and second BAP header information, and the first IAB node is a destination node corresponding to the second BAP header information;

a sending module, configured to transmit the parsed data packet including the first BAP header information to the first IAB node, so that the first IAB node transmits the data packet without the first BAP header information to a second IAB node based on the first BAP header information, where the second IAB node is a destination node corresponding to the first BAP header information;

wherein the first BAP header information is used to indicate a routing path from a first IAB node to the second IAB node, and the second BAP header information is used to indicate a routing path from the second IAB donor node to the first IAB node.

15. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to execute the method of data transmission in an IAB network of any of claims 1 to 8.

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