Handover Threshold Control via Carrier Aggregation Policies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, existing handover management techniques do not effectively consider the carrier-aggregation capabilities of user equipment (UE) and neighboring base stations, leading to inefficient handover decisions that can result in suboptimal resource allocation and interference.
Innovation Solution
A method where a base station determines whether a target cell can be aggregated with other cells and whether the UE supports carrier aggregation, selecting a handover threshold based on this information to control the handover process, thereby optimizing handover decisions and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing handover management techniques are used without considering carrier-aggregation capabilities, then handover decisions are made based on simple signal strength thresholds, but this leads to suboptimal resource allocation and interference
Solution Approach 1:
The base station pre-acquires and stores carrier aggregation capability information for neighboring base stations before handover decisions are needed. This preliminary action allows the handover decision process to efficiently utilize this information without adding significant complexity to the real-time decision-making process
Solution Approach 2:
The system implements feedback mechanisms where UEs report their carrier aggregation capability status and the base station uses this feedback to make informed handover decisions. The base station also shares carrier aggregation policy information with neighboring base stations through feedback channels, enabling coordinated resource allocation
2Adaptability or versatility
If handover threshold is lowered to enable more handovers, then UE can access more cells, but this may cause suboptimal resource allocation when UE lacks carrier aggregation capability
Solution Approach 1:
The base station applies different handover threshold policies locally based on UE capability. UEs with carrier aggregation capability receive more favorable handover conditions and lower thresholds, while UEs without this capability receive more conservative thresholds. This local differentiation optimizes resource allocation efficiency while maintaining handover flexibility for capable devices
3Power
If carrier aggregation is supported at target cell, then bandwidth can be increased, but this requires coordinated policies between serving and neighboring base stations
Solution Approach 1:
The base station implements a universal carrier aggregation policy framework that can be shared and coordinated with neighboring base stations. This framework defines standardized policies for carrier aggregation support, enabling multiple base stations to work together seamlessly to provide extended bandwidth capacity while avoiding the complexity of custom bilateral agreements
Data Source
AI summary
A base station may use another base station's carrier-aggregation policy for a cell and carrier-aggregation capability information for a UE as a basis to control handover of the UE from the base station to the other base station. As one example, a first base station may receive, from a UE, a report that the UE has detected coverage of a target cell. The target cell may be provided by a second base station, and the first base station may determine whether the target cell can be aggregated with one or more other cells and whether the UE supports carrier aggregation. The first base station may then select a handover threshold based on the determination, and use the selected handover threshold as a basis to control handover of the UE from being served by the first base station to being served by the second base station.