INFORMATION PROCESSING METHOD AND APPARATUS
An information processing apparatus, configured in an IAB-node in an integrated access and backhaul (IAB) network, includes: a receiver configured to receive backhaul adaptation protocol (BAP) configuration information; and processor circuitry configured to use the BAP configuration information in topology of an IAB donor central unit (IAB-donor-CU) generating the BAP configuration information if the BAP configuration information is configured to be setup or if the BAP configuration information includes a BAP address.
1 . An information processing apparatus, configured in an IAB-node in an integrated access and backhaul (IAB) network, the apparatus comprising:
a receiver configured to receive backhaul adaptation protocol (BAP) configuration information; and
processor circuitry configured to use the BAP configuration information in topology of an IAB donor central unit (IAB-donor-CU) generating the BAP configuration information if the BAP configuration information is configured to be setup or if the BAP configuration information includes a BAP address.
2 . The apparatus according to claim 1 , wherein,
if the BAP configuration information includes the BAP address, the processor circuitry configures the BAP address as a BAP address used by a BAP entity of the IAB-node;
and the processor circuitry uses the BAP address in the topology of the IAB-donor-CU generating the BAP configuration information.
3 . The apparatus according to claim 1 , wherein,
the BAP configuration information is included in a radio resource control (RRC) reconfiguration message.
4 . The apparatus according to claim 1 , wherein,
the IAB-node is an IAB-node with an RRC interface and an F1 interface terminated to different IAB-donor-CUs.
5 . The apparatus according to claim 1 , wherein,
the receiver further receives cell group configuration information, the cell group configuration information including a BAP address;
and the processor circuitry designates the BAP address as a BAP address of a parent node of the IAB-node, and the BAP address is configured by an IAB-donor-CU configuring the cell group.
6 . The apparatus according to claim 5 , wherein,
the cell group configuration information is included in an RRC reconfiguration message.
7 . The apparatus according to claim 5 , wherein,
the parent node of the IAB-node is an IAB-node with an RRC interface and an F1 interface terminated to different IAB-donor-CUs.
8 . An information processing apparatus, configured in a target IAB-donor-CU in an IAB network, the apparatus comprising:
processor circuitry configured to, when the target IAB-donor-CU responds to a source IAB-donor-CU with an Egress BAP Routing ID, provide the same Egress BAP Routing ID for all to-be-offloaded uplink traffic, whose UL BH mappings received from the source IAB-donor-CU in an IAB TRANSPORT MIGRATION MANAGEMENT REQUEST message share the same Ingress BAP Routing ID.
9 . The apparatus according to claim 8 , wherein,
the processor circuitry provides the Egress BAP Routing ID to the source IAB-donor-CU in an IAB TRANSPORT MIGRATION MANAGEMENT RESPONSE message via XnAP signaling.
10 . The apparatus according to claim 8 , wherein,
the Egress BAP Routing ID is used for the uplink traffic offloading of a descendant IAB-node of a boundary IAB-node.
11 . The apparatus according to claim 10 , wherein,
the boundary IAB-node is an IAB-node with an RRC interface and an F1 interface terminated to different IAB-donor-CUs.
12 . The apparatus according to claim 10 , wherein,
the target IAB-donor-CU responding to a source IAB-donor-CU with an Egress BAP Routing ID is performed in the IAB inter-CU topology adaptation procedure with descendant IAB-node.
13 . The apparatus according to claim 10 , wherein,
the IAB-MT of the boundary IAB-node migrates to a parent node under a different IAB-donor-CU and the IAB-DU of the boundary IAB-node and its descendant IAB-node retain F1 connection with the source IAB-donor-CU.
14 . An information processing apparatus, configured in a descendant IAB-node of a boundary IAB-node in an IAB network, the apparatus comprising:
processor circuitry configured to select an IP address for to-be-offloaded uplink traffic, the IP address satisfying the following conditions that:
the IP address is anchored at an IAB donor distributed unit (IAB-donor-DU) whose BAP address is contained in the BAP routing identifier of the uplink mapping for the uplink traffic; and
the IP address is configured by a source IAB-donor-CU, and the source IAB-donor-CU obtains the IP address from a target IAB-donor-CU.
15 . The apparatus according to claim 14 , wherein,
the boundary IAB-node is an IAB-node with an RRC interface and an F1 interface terminated to different IAB-donor-CUs.
16 . The apparatus according to claim 14 , wherein,
the source IAB-donor node of the descendant IAB-node performs uplink traffic mapping configuration on the descendant IAB-node, the uplink traffic mapping configuration including a BAP routing identifier used by each uplink traffic, a BAP address included in the BAP routing identifier being a destination address of the uplink traffic.
17 . The apparatus according to claim 14 , wherein,
the IP address selection is performed in an IAB inter-CU topology adaptation procedure with descendant IAB-node.
18 . The apparatus according to claim 14 , wherein,
the IAB-MT of the boundary IAB-node migrates to a parent node in a different IAB-donor-CU and the IAB-DU of the boundary IAB-node and its descendant IAB-node retain F1 connection with the source IAB-donor-CU.
19 . The apparatus according to claim 14 , wherein,
the source IAB-donor-CU sends a DL RRC MESSAGE TRANSFER message to the descendant IAB-node's parent IAB-node, which includes an RRCReconfiguration message for the descendant IAB-node, the RRCReconfiguration message including the new TNL (IP) addresses received in IAB TRANSPORT MIGRATION MANAGEMENT RESPONSE message.
20 . The apparatus according to claim 19 , wherein,
the descendant IAB-node's parent IAB-node forwards the received RRCReconfiguration message to the descendant IAB-node.