Base Station Cell Switch Handover With Early Timing Advance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing handover procedures, particularly in scenarios involving subsequent cell switches, which can lead to service disruptions and increased latency due to suboptimal handover mechanisms.
Innovation Solution
Implementing a mechanism for subsequent cell switch procedures that utilize conditional handover configurations and early timing advance acquisition to optimize handover processes, reducing latency and improving service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handover procedures are used in subsequent cell switches, then handover can be completed, but service disruptions and latency increase
Solution Approach 1:
The patent applies preliminary action by acquiring timing advance values early during the handover preparation phase, before the actual cell switch occurs. The source base station provides timing advance information to the target base station in advance, allowing the UE to quickly adjust uplink timing without waiting for post-handover measurements, thereby reducing handover latency while maintaining service continuity
Solution Approach 2:
The patent implements beforehand cushioning by pre-configuring conditional handover parameters and timing advance values before the handover is triggered. This preparatory configuration acts as a cushion that prevents service disruptions during the actual cell switch, as the UE and base stations already have the necessary parameters ready for immediate execution
2Productivity
If existing handover mechanisms are used, then cell switching can occur, but handover efficiency decreases due to suboptimal procedures
Solution Approach 1:
The patent improves handover efficiency through preliminary action by establishing timing advance relationships during the handover preparation phase. The target base station receives timing advance information from the source base station before the handover executes, enabling faster uplink synchronization and reducing overall handover execution time
Solution Approach 2:
The patent employs feedback mechanisms where the source base station provides timing advance measurements and observations about the UE's uplink timing to the target base station. This feedback loop allows the target base station to pre-configure appropriate timing advance values, improving handover efficiency while minimizing service disruptions
Data Source
AI summary
A first base station comprises one or more processors and memory storing instructions that, when executed by the one or more processors, cause the first base station to receive, from a second base station, a cell switch notification message, for a wireless device, comprising an identifier of a candidate cell. The instructions further cause the first base station to transmit, to a third base station, a second message to establish a connection, for the wireless device, between the first base station and the third base station. The second message comprises a first identifier identifying the wireless device within the first base station. The instructions further cause the first base station to receive, from the third base station, a third message, to establish the connection, comprising a fourth identifier identifying the wireless device within the third base station.