Network Control Repeater RLF Handling via Pre-configured Cell Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The behavior and requirements for Network Control Repeater (NCR) during radio link failure (RLF) are undefined, including cell selection, RLF indication, and re-establishment procedures, which affect its operation and communication with user equipment (UE) and the network.
Innovation Solution
The NCR determines if an RLF occurred and performs cell selection for RRC connection with a pre-configured or fallback base station, and communicates RLF status to UE and the network, ensuring transparent operation and appropriate actions are taken.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NCR performs cell selection and RRC connection procedure after RLF, then network connectivity is restored, but connection establishment time increases
Solution Approach 1:
The NCR performs cell selection procedures and maintains a list of candidate base stations before actual connection failure occurs. When RLF happens, the NCR can immediately initiate RRC connection with a pre-identified candidate base station, avoiding the need for time-consuming cell search and selection after failure.
2Ease of operation
If NCR maintains transparency to UE during RLF handling, then UE communication is uninterrupted, but NCR control complexity increases
Solution Approach 1:
The network acts as an intermediary that provides RLF indication to the NCR. The network also provides the NCR with a list of candidate base stations and receives RRC connection establishment confirmation from the NCR. This intermediary approach allows the NCR to maintain UE transparency while the network handles the complex coordination of failover procedures.
Data Source
AI summary
A method performed by a network control repeater (NCR) is provided. The method comprises determining whether a radio link failure (RLF) between the NCR and a first base station occurred. The method comprises, in case that the RLF between the NCR and the first base station occurred, performing cell selection for radio resource control (RRC) connection procedure. The method comprises, based on the result of the performing cell selection procedure, performing the RRC connection procedure with a selected base station.