4.11 Support for UE assistance information for local cache

36.3003GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN)Overall descriptionRelease 17Stage 2TS

UE assisted local cache is a solution to address long backhaul latency issue. The UE is allowed to transmit assistance information bit to eNB to enable the eNB to identify whether an uplink data needs to be transferred to the local cache entity, which may be co-sited with eNB or has direct connection with eNB, by operator implementation.

UE can report to the network its capability of supporting assistance information bit for local cache. If supported, the UE assisted local cache function can be activated by the eNB. After that, the UE may indicate the assistance information bit in the uplink PDCP PDU. Whether the UE indicates this assistance information bit is based on for instance the service from the application layer the UE requests that support local cache handling.