Method and device for sending and receiving data packet, and data packet transmission system

1. A method for sending a data packet, comprising:

acquiring, by an Integrated Access and Backhaul Links (IAB) node, bearer configuration information from a Centralized Unit (CU), and determining, by the IAB node according to the bearer configuration information, a bearer for sending a data packet, wherein the bearer configuration information comprises indication information indicating a protocol type of the data packet borne by an associated bearer, and the indication information indicating the protocol type of the data packet borne by the associated bearer comprises indication information indicating that the associated bearer is used for bearing an F1 Application Protocol (F1AP) message; and

sending, by the IAB node, the data packet to a child IAB node, a parent IAB node or an IAB donor through the bearer.

2. The method as claimed in claim 1 , wherein the bearer configuration information further comprises at least one of the following:

a bearer identifier containing a Data Radio Bearer Identifier (DRB ID) or a Signaling Radio Bearer Identifier (SRB ID);

indication information indicating whether an adaptation layer needs to be parsed;

indication information indicating F1AP encapsulation;

indication information indicating General Packet Radio Service Tunneling Protocol User Plane (GTP-U) encapsulation;

indication information indicating Packet Data Convergence Protocol (PDCP) processing;

indication information indicating whether a data packet borne by an associated bearer is a forwarded data packet;

indication information indicating that an associated bearer is used for forwarding.

3. The method as claimed in claim 1 , wherein before acquiring, by the IAB node, the bearer configuration information, the method further comprises:

sending, by the IAB node, indication information to a CU through a Radio Resource Control (RRC) message or an F1 message, wherein the indication information is IAB node indication information, or is used for requesting the bearer configuration information for the IAB node.

4. The method as claimed in claim 1 , wherein acquiring, by the IAB node, the bearer configuration information from the CU comprises:

acquiring, by the IAB node, the bearer configuration information from the CU through a Radio Resource Control (RRC) message; or,

acquiring, by the IAB node, the bearer configuration information from the CU through an F1 message.

5. The method as claimed in claim 3 , wherein the RRC message or the F1 message comprises identifier information of the IAB node.

6. A method for receiving a data packet, comprising:

receiving, by an integrated Access and Backhaul Links (IAB) node, a data packet sent by a designated IAB node, wherein the designated IAB node is a child IAB node or a parent IAB node or an IAB donor, and

processing, by the IAB node, the data packet according to bearer configuration information acquired from a Centralized Unit (CU), wherein the bearer configuration information comprises indication information indicating a protocol type of the data packet borne by an associated bearer, and the indication information indicating the protocol type of the data packet borne by the associated bearer comprises indication information indicating that the associated bearer is used for bearing an F1 Application Protocol (F1AP) message.

7. The method as claimed in claim 6 , wherein processing the data packet according to the acquired bearer configuration information comprises:

judging, by the IAB node according to the bearer configuration information, whether to perform adaptation layer parsing on the data packet; or,

judging, by the IAB node according to the bearer configuration information, whether to perform F1 Application Protocol (F1AP) protocol layer processing on the data packet; or,

judging, by the IAB node according to the bearer configuration information, whether to perform General Packet Radio Service Tunneling Protocol User Plane (GTP-U) protocol layer processing on the data packet; or,

judging, by the IAB node according to the bearer configuration information, whether to perform Packet Data Convergence Protocol (PDCP) protocol layer processing on the data packet.

8. A device for sending a data packet, located in an Integrated Access and Backhaul Links (IAB) node, and comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method as claimed in claim 1 .

9. A device for receiving a data packet, located in an Integrated Access and Backhaul Links (IAB) node, and comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method as claimed in claim 6 .