Method and apparatus for routing data in a communication system

An apparatus for wireless communication, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the apparatus to:
• receive configuration information indicating at least one candidate path identity;
• detect a failure in a backhaul link between two communication devices;
• select a candidate path identity from the at least one candidate path identity for downlink transmission, wherein an egress link associated with the selected candidate path identity does not include the failed backhaul link between the two communication devices;
• transmit the downlink transmission on the egress link;
• and
• transmit, in response to the failure in the backhaul link between the two communication devices, a buffer status report (BSR) or a pre-emptive BSR (pre-BSR).

A method for wireless communication, the method comprising:

• select a first egress link between the apparatus and a first next hop communication device;
• receive, from a base station, configuration information, the configuration information indicating routing configuration and bearer mapping configuration;
• detect a failure on the first egress link between an apparatus and the first next hop communication device;
• re-route first data intended to be transmitted on the first egress link, the first data has not been acknowledged by a layer lower than a backhaul adaption protocol (BAP) layer;
• reselect a second egress link between the apparatus and a second next hop communication device based on the routing configuration;
• reselect an egress radio link control (RLC) channel of the second egress link based on the bearer mapping configuration;
• submit the first data to the reselected egress RLC channel of the second egress link;
• and
• transmit, in response to the failure on the first egress link and re-routing the first data to the second next hop communication device, a buffer status report (BSR) or a pre-emptive BSR (pre-BSR) associated with the first data to the second next hop communication device.