US 11,985,652 B2
P-BSR enhancements for IAB networks to improve E2E latency
Sarma V. Vangala, Cupertino, CA (US); Fangli Xu, Beijing (CN); Haijing Hu, Cupertino, CA (US); Murali Narasimha, Cupertino, CA (US); Naveen Kumar R Palle Venkata, San Diego, CA (US); Ralf Rossbach, Bavaria-Bayern (DE); Sethuraman Gurumoorthy, Cupertino, CA (US); Sree Ram Kodali, Cupertino, CA (US); Yuqin Chen, Beijing (CN); and Zhibin Wu, Cupertino, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Appl. No. 17/593,680
Filed by APPLE INC., Cupertino, CA (US)
PCT Filed Jan. 14, 2021, PCT No. PCT/CN2021/071679
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2022/151129, PCT Pub. Date Jul. 21, 2022.
Prior Publication US 2023/0180212 A1, Jun. 8, 2023
Int. Cl. H04W 72/1263 (2023.01); H04W 28/02 (2009.01)
CPC H04W 72/1263 (2013.01) [H04W 28/0278 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of an integrated access and backhaul (IAB) node of a wireless communication system, comprising:
assigning one or more incoming data flows received by the IAB node to an outgoing data flow having an outgoing logical channel group (LCG) based on an incoming LCG of each of the one or more incoming data flows, wherein the outgoing LCG indicates a priority of the outgoing data flow, wherein the assignment of the one or more incoming data flows to the outgoing data flow is based on a configuration provided to the IAB node by an IAB control unit (CU), and wherein the outgoing LCG is determined based on a comparison of a number of the one or more incoming data flows with a threshold amount of data flows that is received from the IAB CU; and
sending a pre-emptive buffer status report (pre-BSR) to a second IAB node of the wireless communication system using an extended Medium Access Control (MAC) Control Element (MAC CE) that communicates the outgoing LCG and a requested buffer size corresponding to the outgoing data flow.