L1/L2 Triggered Mobility Cancellation for Unnecessary Handover Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing mobility events, particularly in heterogeneous networks, leading to suboptimal resource allocation and increased latency due to inefficient handover processes.
Innovation Solution
Implementing Layer 1/Layer 2 (L1/L2) triggered mobility cancellation mechanisms initiated by the target base station to optimize handover procedures, reducing unnecessary handovers and improving resource allocation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional handover procedures are used in heterogeneous networks, then mobility management is maintained, but resource allocation efficiency deteriorates and latency increases due to unnecessary handovers
Solution Approach 1:
The target base station proactively sends a handover cancellation indication to the source base station before the handover is fully executed, based on preliminary assessment that the handover is unnecessary. This preliminary action prevents the completion of redundant handover procedures, thereby reducing latency and optimizing resource allocation without compromising mobility management.
2Reliability
If handover procedures are executed to ensure mobility management, then connectivity is maintained, but resource allocation efficiency deteriorates due to unnecessary handovers
Solution Approach 1:
The system implements a feedback mechanism where the target base station monitors handover conditions and provides cancellation indications to the source base station when handovers are determined to be unnecessary. This feedback loop ensures that mobility management remains reliable by only executing handovers when actually needed, thereby improving resource allocation efficiency without compromising connectivity.
Data Source
AI summary
A wireless device transmits, to a base station, a measurement report message and receives, from the base station, a first radio resource control (RRC) reconfiguration message comprising a layer 1/layer 2 triggered mobility (LTM) configuration comprising an LTM candidate configuration of a candidate cell for an LTM, an identifier of the LTM candidate configuration, and a cell identifier of the candidate cell. The wireless device transmits, after receiving the first RRC reconfiguration message and to the base station, an RRC reconfiguration complete message and transmits, to the base station, a layer 1 measurement report and receives, from the base station, a second RRC reconfiguration message indicating to release the LTM candidate configuration. A cancelling of the LTM is indicated by an LTM cancel message comprising the identifier of the candidate cell and a cause value indicating a reason for the cancelling of the LTM of the candidate cell.