Traffic migration between network topology

1 . A communication apparatus comprising:

at least one processor configured to perform operations comprising:

determining at least one of first quality of service (QoS) information of data or a signaling type of signaling, wherein the first QoS information comprises QoS parameters for controlling transmission of the data in a second network topology managed by a second integrated access and backhaul donor central unit (IAB donor CU), and the signaling type comprises a type indicator for controlling transmission of the signaling in the second network topology;

sending a first message to the second IAB donor CU, wherein the first message comprises the at least one of the first QoS information or indication information of the signaling type, wherein

the data or the signaling is communicated across the second network topology and a first network topology managed by the apparatus; and

wherein the first message further comprises a first routing identifier, and wherein

the first network topology comprises a first node and a second node, the first routing identifier identifies a first path for transmission of at least one of the data or the signaling between the first node and the second node, the first node is a boundary node, and the second node is an access node of a terminal device.

2 . The apparatus according to claim 1 , wherein the determining first QoS information of data comprises:

determining second QoS information and the first QoS information based on QoS corresponding to the data; and

wherein the operations further comprise at least one of:

determining transmission of the data in the first network topology based on the second QoS information; or

determining transmission of the signaling in the first network topology based on the signaling type.

3 . The apparatus according to claim 1 , wherein the first message further comprises a first backhaul radio link control channel (BH RLC CH) identifier, wherein

the first BH RLC CH identifier identifies a first BH RLC CH for transmission of at least one of the data or the signaling between the first node and a child node of the first node.

4 . The apparatus according to claim 1 , wherein the first network topology comprises a first node and a second node, the first message further comprises first indication information, and the first indication information indicates that a first path for transmission of at least one of the data or the signaling between a first node and a second node is used for uplink transmission or downlink transmission, or a first backhaul radio link control channel (BH RLC CH) indicated by the first message is used for uplink transmission or downlink transmission.

5 . The apparatus according to claim 3 , wherein the operations further comprise:

receiving a second message from the second IAB donor CU, wherein the second message comprises at least one of a second routing identifier corresponding to the first routing identifier, or a second BH RLC CH identifier corresponding to the first BH RLC CH identifier.

6 . The apparatus according to claim 3 , wherein the operations further comprise:

receiving a second message from the second IAB donor CU, wherein the second message comprises second indication information, and the second indication information indicates that a second path corresponding to a second routing identifier comprised in the second message is used for uplink transmission or downlink transmission, or a second BH RLC CH corresponding to a second BH RLC CH identifier comprised in the second message is used for uplink transmission or downlink transmission.

7 . The apparatus according to claim 5 , wherein the operations further comprise:

sending a third message to the first node, wherein the third message comprises the first routing identifier and the second routing identifier, or the first BH RLC CH identifier and the second BH RLC CH identifier, wherein

the second network topology comprises the first node and a third node, the second routing identifier identifies a second path for transmission of at least one of the data or the signaling between the first node and the third node, the second BH RLC CH identifier identifies the second BH RLC CH for transmission of at least one of the data or the signaling between the first node and a parent node of the first node, and the third node is a second IAB donor DU.

8 . The apparatus according to claim 1 , wherein the operations further comprise:

receiving a second message from the second IAB donor CU, wherein the second message comprises at least one of a second routing identifier or a second BH RLC CH identifier, wherein

the second network topology comprises a first node and a third node, the second routing identifier identifies a second path for transmission of at least one of the data or the signaling between the first node and the third node, the second BH RLC CH identifier identifies a second BH RLC CH for transmission of at least one of the data or the signaling between the first node and a parent node of the first node, the first node is a boundary node, and the third node is a second IAB donor DU.

9 . The apparatus according to claim 8 , wherein the second message further comprises second indication information, and the second indication information indicates that the second path or the second BH RLC CH is used for uplink transmission or downlink transmission.

10 . The apparatus according to claim 8 , wherein the first network topology comprises the first node and a second node, and the operations further comprise:

determining a first routing identifier corresponding to the second routing identifier, or a first BH RLC CH identifier corresponding to the second BH RLC CH identifier.

11 . The apparatus according to claim 8 , wherein the operations further comprise:

sending a third message to the first node, wherein the third message comprises the first routing identifier and the second routing identifier, or a first BH RLC CH identifier and the second BH RLC CH identifier, wherein

the first network topology comprises the first node and the second node, the first routing identifier identifies a first path for transmission of at least one of the data or the signaling between the first node and the second node, the first BH RLC CH identifier identifies a first BH RLC CH for transmission of at least one of the data or the signaling between the first node and a child node of the first node, and the second node is an access node of a terminal device.

12 . A communication apparatus comprising:

at least one processor configured to perform operations comprising:

receiving a first message from a first integrated access and backhaul donor central unit (IAB donor CU), wherein the first message comprises at least one of first quality of service (QoS) information or indication information of a signaling type;

determining, at least one of the following:

transmission of data in a second network topology managed by the apparatus based on the first QoS information; or

transmission of signaling in the second network topology based on the signaling type; and

wherein the first message further comprises a first routing identifier, and wherein

a first network topology managed by the first IAB donor CU comprises a first node and a second node, the first routing identifier identifies a first path for transmission of at least one of the data or the signaling between the first node and the second node, the first node is a boundary node, and the second node is an access node of a terminal device.

13 . The apparatus according to claim 12 , wherein the first message further comprises a first backhaul radio link control channel (BH RLC CH) identifier, wherein

the first BH RLC CH identifier identifies a first BH RLC CH for transmission of at least one of the data or the signaling between the first node and a child node of the first node.

14 . The apparatus according to claim 12 , wherein a first network topology managed by the first IAB donor CU comprises a first node and a second node, the first message further comprises first indication information, and the first indication information indicates that a first path for transmission of at least one of the data or the signaling between a first node and a second node is used for uplink transmission or downlink transmission, or a first backhaul radio link control channel (BH RLC CH) indicated by the first message is used for uplink transmission or downlink transmission.

15 . The apparatus according to claim 13 , wherein the first message further comprises QoS of the first BH RLC CH identifier.

16 . The apparatus according to claim 13 , wherein the operations further comprise:

sending a second message to the first IAB donor CU, wherein the second message comprises at least one of a second routing identifier corresponding to the first routing identifier, or a second BH RLC CH identifier corresponding to the first BH RLC CH identifier, wherein

the second network topology comprises the first node and a third node, the second routing identifier identifies a second path for transmission of at least one of the data or the signaling between the first node and the third node, the second BH RLC CH identifier identifies a second BH RLC CH for transmission of at least one of the data or the signaling between the first node and a parent node of the first node, and the third node is a second IAB donor DU.

17 . The apparatus according to claim 12 , wherein the operations further comprise:

sending a second message to the first IAB donor CU, wherein the second message comprises at least one of a second routing identifier or a second BH RLC CH identifier, wherein

the second network topology comprises a first node and a third node, the second routing identifier identifies a second path for transmission of at least one of the data or the signaling between the first node and the third node, the second BH RLC CH identifier identifies a second BH RLC CH for transmission of at least one of the data or the signaling between the first node and a parent node of the first node, the first node is a boundary node, and the third node is a second IAB donor DU.

18 . The apparatus according to claim 16 , wherein the second message further comprises second indication information, and the second indication information indicates that the second path or the second BH RLC CH is used for uplink transmission or downlink transmission.

19 . A communication apparatus comprising:

at least one processor configured to perform operations comprising:

receiving a third message from a first integrated access and backhaul donor central unit (IAB donor CU), wherein the third message comprises a first routing identifier and a second routing identifier, or a first backhaul radio link control channel (BH RLC CH) identifier and a second BH RLC CH identifier;

determining, based on the first routing identifier and the second routing identifier, routing conversion between transmission of at least one of data or signaling in a first network topology managed by the first IAB donor CU and transmission of at least one of the data or the signaling in a second network topology managed by a second IAB donor CU; and

determining, based on the first BH RLC CH identifier and the second BH RLC CH identifier, bearer mapping conversion between the transmission of at least one of the data or the signaling in the first network topology and the transmission of at least one of the data or the signaling in the second network topology, wherein

the first network topology comprises a first node and a second node, the first routing identifier identifies a first path for transmission of at least one of the data or the signaling between the first node and the second node, the first BH RLC CH identifier identifies a first BH RLC CH for transmission of at least one of the data or the signaling between the first node and a child node of the first node, the first node is a boundary node, and the second node is an access node of a terminal device; and

the second network topology comprises the first node and a third node, the second routing identifier identifies a second path for transmission of at least one of the data or the signaling between the first node and the third node, the second BH RLC CH identifier identifies a second BH RLC CH for transmission of at least one of the data or the signaling between the first node and a parent node of the first node, and the third node is a second IAB donor DU.

20 . The apparatus according to claim 19 , wherein the third message further comprises third indication information, and the third indication information indicates at least one of:

that the first path and the second path are used for uplink transmission or downlink transmission, or

that the first BH RLC CH and the second BH RLC CH are used for uplink transmission or downlink transmission.