CoMP Handover Selection via Aggregate Throughput Ranking
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Solution Overview
Problem
In wireless communication networks, handover of User Equipment (UE) to neighboring Base Stations (NBS) is often inefficient due to insufficient resource support and quality of service (QoS) issues, leading to service denial, admission refusal, and throughput drops, as existing methods rely solely on signal strength and load at the Serving Base Station (SBS).
Innovation Solution
A method for Coordinated Multipoint (CoMP) handover that detects UE handover triggers based on aggregate throughput across multiple CoMP links, ranks neighboring Base Stations (NBS) on handover potential, and selects a target NBS for migration of active CoMP links, ensuring seamless service continuity and throughput maintenance by considering UE support capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If handover decision is based on signal strength and load at SBS, then handover speed is improved, but service continuity and throughput maintenance deteriorate
Solution Approach 1:
The patent changes the handover decision parameters from simple signal strength and load metrics to a comprehensive evaluation including handover potential, UE support capability, and aggregate throughput across multiple CoMP links. This parameter transformation enables more reliable handover decisions while maintaining speed through automated ranking and selection algorithms.
Solution Approach 2:
The patent performs preliminary evaluation of handover potential and UE support capability before actual handover execution. By pre-assessing target NBS capabilities and CoMP link configurations, the system ensures service continuity is maintained while enabling rapid handover execution through pre-computed rankings.
2Speed
If target NBS is selected based on signal strength, then handover speed is improved, but resource support and QoS satisfaction deteriorate
Solution Approach 1:
The patent transforms the handover selection criteria from signal strength-only to a multi-parameter evaluation including handover potential, UE support capability, and resource availability. This enables the system to select target NBS that can actually support the UE's QoS requirements while maintaining efficient handover through automated ranking.
Solution Approach 2:
The patent incorporates feedback mechanisms by evaluating UE support capability information and aggregate throughput across CoMP links when selecting target NBS. This feedback loop ensures that handover decisions are based on actual resource support capability rather than just signal strength, preventing admission refusal and service denial.
3Device complexity
If all CoMP links are terminated during handover, then handover simplicity is improved, but throughput maintenance and service continuity deteriorate
Solution Approach 1:
The patent segments the CoMP links into different categories during handover, allowing selective migration of active CoMP links to the target NBS rather than terminating all links. This segmentation approach maintains throughput by preserving essential CoMP connections while simplifying handover through structured link management.
Solution Approach 2:
The patent ensures continuity of useful action by migrating active CoMP links to the target NBS during handover rather than terminating them. This maintains service continuity and throughput performance while keeping handover complexity manageable through automated link migration procedures.
4Speed
If target NBS is selected without considering UE support capability, then handover speed is improved, but admission refusal and service denial increase
Solution Approach 1:
The patent adds UE support capability as a critical parameter in the handover selection process. By evaluating whether the target NBS can support the specific UE capabilities and QoS requirements, the system prevents admission refusal and service denial while maintaining efficient handover through automated ranking and selection.
Data Source
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AI summary
Methods and systems for Coordinated Multipoint (CoMP) handover in a wireless communication network are disclosed. In an embodiment, the method includes detecting a User Equipment (UE) handover trigger based on an aggregate throughput for each Data Radio Bearers (DRBs) in each CoMP link between the UE and each Neighboring Base Stations (NBS) in a set of NBSs, the UE being in communication with a Serving Base Station (SBS) and each NBS in the set of NBSs through a set of active CoMP links; ranking each NBS based on handover potential of each NBS in the set of NBSs; and selecting a target NBS from the set of NBSs for UE handover based on the ranking and UE support capability information associated with each NBS, wherein a subset of the set of active CoMP links is migrated to the target NBS during the UE handover.