Selective Handover Data Transfer for Relay Base Stations
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Solution Overview
Problem
Conventional wireless communication networks face traffic burdens and latency during handover operations when transferring buffered downlink data to relay base stations with wireless backhaul connections, as all data is typically transmitted, including non-critical data that can be omitted without adverse impact on communication sessions.
Innovation Solution
The method involves determining if the target base station is a relay base station with a wireless backhaul connection and, if so, refraining from transmitting at least some of the buffered downlink data from the source base station during handover, thereby reducing traffic burden on the air interface and wireless backhaul.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all buffered downlink data is transmitted to the relay base station during handover, then data completeness is improved, but traffic burden and latency on the air interface and wireless backhaul worsen
Solution Approach 1:
The patent extracts and identifies critical data from the buffered downlink data at the source base station. Only the essential critical data is transferred to the target relay base station, while non-critical data is omitted. This selective extraction resolves the contradiction by ensuring data completeness for essential information while reducing the overall data volume to minimize handover latency and traffic burden on the air interface and wireless backhaul.
2Reliability
If all buffered downlink data is transmitted to the relay base station, then data completeness is improved, but traffic burden on air interface and wireless backhaul worsens
Solution Approach 1:
The source base station extracts only the critical portion of buffered downlink data for transfer to the target relay base station. Non-critical data is deliberately excluded from the transfer. This extraction approach maintains data completeness for essential information while significantly reducing the traffic volume on the air interface and wireless backhaul, thereby resolving the contradiction between data completeness and traffic burden.
3Reliability
If buffered data is transmitted during handover to relay base station, then communication continuity is improved, but congestion on wireless backhaul worsens
Solution Approach 1:
The patent applies data extraction by identifying and transferring only critical data during handover to the relay base station. This selective transfer maintains communication continuity for essential services while reducing the overall data load on the wireless backhaul. The result is improved backhaul efficiency with reduced congestion, while still ensuring continuous communication for critical data streams.
4Loss of time
If selective data omission is implemented during handover, then latency is reduced, but data completeness worsens
Solution Approach 1:
The patent applies local quality by differentiating between critical and non-critical data portions. Critical data receives priority handling and is transferred to ensure completeness, while non-critical data is selectively omitted to reduce latency. This differential treatment based on data importance resolves the contradiction by maintaining data completeness for essential information while accepting selective omission for non-essential data to achieve lower handover latency.
Data Source
AI summary
A method and system for transferring buffered downlink data for a wireless communication device (WCD) from a source base station to a target base station as part of a handover of the WCD from the source to the target base station. The source base station may have downlink data for transmission to the WCD buffered during the handover. A determination may be made as to whether or not the target base station is a relay base station with a wireless backhaul. If the target base station is determined to be a relay base station with a wireless backhaul, then the source base station may refrain from transmitting at least one portion of the buffered data to the target base station.