UE Cell Switch Event Logging for Lower Signaling Overhead
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Solution Overview
Problem
Existing methods for reporting cell switch events in wireless communication systems are not suitable for scenarios where a user equipment (UE) moves along a fixed pattern, leading to increased signaling overhead and processing burden for base stations.
Innovation Solution
A UE is configured to log and report cell switch events, such as handover or cell reselection events, by storing specific information related to the event, which it transmits to the base station when reconnecting, reducing the need for continuous reporting and minimizing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously reports cell switch events to the base station, then the base station can make accurate handover decisions, but the signaling overhead and processing burden increase
Solution Approach 1:
The UE performs preliminary actions by logging cell switch event information locally before reporting to the base station. The UE stores event IDs, timestamps, and cell identities in its memory during mobility events, then reports this pre-collected data upon connection, eliminating the need for continuous real-time reporting while maintaining decision accuracy
Solution Approach 2:
The patent extracts only the essential elements needed for handover decisions (event ID, timestamp, cell identity) from the complete cell switch event data. By reporting only these critical parameters rather than full event details, the signaling overhead is reduced while the base station retains sufficient information for accurate handover decisions
2Loss of information
If the UE reports detailed cell switch event information frequently, then the base station can track UE movement patterns accurately, but the processing burden on the base station increases
Solution Approach 1:
The UE creates a simplified copy of the cell switch event information containing only essential parameters (event ID, timestamp, cell identity) rather than reporting complete event details. This copied data structure reduces the processing burden on the base station while preserving the core information needed to track UE movement patterns
Solution Approach 2:
The UE performs preliminary data preparation by logging and organizing cell switch event information locally before reporting. This advance preparation allows the base station to receive pre-processed data that requires minimal additional processing, reducing the overall processing burden while maintaining accurate movement pattern tracking
3Quantity of substance
If the UE logs and reports cell switch events only when reconnecting to the first cell, then the signaling overhead is reduced, but the timing of information availability is delayed
Solution Approach 1:
The UE adopts periodic reporting by logging cell switch events continuously during mobility and reporting the accumulated data at periodic intervals when reconnecting to the first cell. This approach reduces signaling overhead compared to continuous reporting while ensuring information is transmitted at regular intervals, balancing delay and overhead concerns
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for logging and reporting cell switch event. According to an embodiment of the present disclosure, a user equipment (UE) may include: a processor configured to log information related to a cell switch event from a first cell to a second cell; and a transmitter coupled to the processor and configured to transmit the information related to the cell switch event to a base station (BS) when the UE connects to the first cell again; and a receiver coupled to the processor.