QOS information exchange to setup a backhaul routing path in IAB

An apparatus for wireless communication of a first network node, comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory and configured to:
• receive, by a central unit (CU) of the first network node, quality of service (QoS) information and a request from a second network node to configure, based on the QoS information, a backhaul routing path for traffic between the second network node and a third network node via the first network node, the third network node having a signaling connection to the second network node;
• communicate, with the second network node in response to the request, QoS mapping information;
• receive, from the second network node, an Internet protocol (IP) packet with a header configured based on the received QoS mapping information;
• transmit, based on the header, the IP packet for routing to the third network node through the backhaul routing path;
• and
• process offload of the traffic based on the IP packet with the configured IP header.

A method of communication of a first network node, comprising:

• sending a request to a central unit (CU) of a second network node to configure, based on quality of service (QoS) information provided by the first network node, a backhaul routing path for traffic between the first network node and a third network node via the second network node, the third network node having a signaling connection with the first network node;
• receiving, from the second network node in response to the request, QoS mapping information;
• configuring an Internet protocol (IP) header of an IP packet based on the received QoS mapping information;
• sending the IP packet with the configured IP header to the second network node for routing through the backhaul routing path;
• and
• offloading the traffic to the second network node based on the IP packet with the configured IP header.

A method of communication of a first network node, comprising:

• receiving, by a central unit (CU) of the first network node, quality of service (QoS) information and a request from a second network node to configure, based on the QoS information, a backhaul routing path for traffic between the second network node and a third network node via the first network node, the third network node having a signaling connection to the second network node;
• communicating, with the second network node in response to the request, QoS mapping information;
• receiving, from the second network node, an Internet protocol (IP) packet with a header configured based on the received QoS mapping information;
• transmitting, based on the header, the IP packet for routing to the third network node through the backhaul routing path;
• and
• processing offload of the traffic based on the IP packet with the configured IP header.

An apparatus for wireless communication of a first Integrated Access and Backhaul (IAB) donor control unit (IAB-donor-CU), comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory and configured to:
• send, to a second IAB-donor-CU, a request to configure a backhaul routing path via a donor-distributed unit (DU) associated with the second IAB-donor-CU and an IAB-node that has a signaling connection with the first IAB-donor-CU, the first IAB-donor-CU providing quality of service (QoS) information for the backhaul routing path to the second IAB-donor-CU;
• receive, from the second IAB-donor-CU, mapping information for a QoS of traffic to be carried over the backhaul routing path;
• and
• cause the traffic to be offloaded to the second IAB-donor-CU for routing through the backhaul routing path.