US 12,457,657 B2
Communication control method and relay node
Masato Fujishiro, Yokohama (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Filed by KYOCERA Corporation, Kyoto (JP)
Filed on Oct. 7, 2022, as Appl. No. 18/045,043.
Application 18/045,043 is a continuation of application No. PCT/JP2021/014298, filed on Apr. 2, 2021.
Claims priority of application No. 2020-070656 (JP), filed on Apr. 9, 2022.
Prior Publication US 2023/0059195 A1, Feb. 23, 2023
Int. Cl. H04W 76/18 (2018.01); H04W 28/02 (2009.01); H04W 76/27 (2018.01)
CPC H04W 76/18 (2018.02) [H04W 28/0273 (2013.01); H04W 76/27 (2018.02)] 5 Claims
OG exemplary drawing
 
1. A communication control method comprising:
establishing, by a relay node configured to relay communication between user equipment and a donor base station, a Backhaul Adaptation Protocol (BAP) entity in response to a Radio Resource Control (RRC) message from the donor base station, in an RRC connected state in which the relay node has an RRC connection with the donor base station;
transitioning, by the relay node, from the RRC connected state to an RRC inactive state;
performing, by the relay node, control to not release but maintain the BAP entity even when the relay node transitions to the RRC inactive state;
establishing, by the relay node, a plurality of Radio Link Control (RLC) channels for relaying the communication;
performing, by the BAP entity, a routing process of selecting one of the plurality of RLC channels as an RLC channel to which a data packet is to be output in the communication; and
in response to the selected RLC channel being unavailable, storing, by the BAP entity, the data packet to be output to the selected RLC channel in a buffer of the BAP entity.