Mobile Device Soft Handoff Coordination in Distributed Base Stations
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Solution Overview
Problem
Current broadband cellular communication systems face challenges in efficiently facilitating soft handoff and data throughput, particularly in distributed architectures where centralized coordination is lacking, leading to uneven coverage and increased interference, and existing solutions require complex centralized control for resource management.
Innovation Solution
A method and system that enables selective soft handoff in mobile broadband systems by allowing the mobile device to coordinate communication with multiple base station transceivers, reserving resources, and performing Layer 2 bearer functions at the base station, eliminating the need for centralized coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized coordination is used for resource management in soft handoff, then resource allocation reliability is improved, but system complexity and control overhead increase
Solution Approach 1:
The patent extracts the coordination function from a centralized controller and relocates it to the mobile device itself. The mobile device independently determines resource reservations with multiple base stations, eliminating the need for centralized coordination while maintaining reliable resource allocation through local decision-making based on measured signal conditions.
Solution Approach 2:
The mobile device performs self-service by autonomously managing its own resource reservations across multiple base stations. It measures signal strengths, determines appropriate resource allocations, and coordinates with base stations independently without requiring external centralized control, thereby reducing system complexity while maintaining allocation reliability.
2Device complexity
If soft handoff is enabled in distributed architecture without centralized coordination, then system complexity is reduced, but resource management precision deteriorates
Solution Approach 1:
The mobile device continuously measures signal strengths from multiple base stations and uses this feedback information to dynamically determine resource reservations. This closed-loop feedback mechanism enables precise resource management at the distributed level, compensating for the lack of centralized coordination through real-time adaptive decision-making based on actual channel conditions.
3Loss of time
If mobile device coordinates soft handoff independently, then centralized control overhead is reduced, but measurement and coordination difficulty increase
Solution Approach 1:
The mobile device performs preliminary measurements of signal strengths from multiple base stations before making resource reservation decisions. By gathering necessary measurement data in advance and using predetermined criteria for resource allocation, the device simplifies the coordination process and reduces the time required for decision-making, making independent coordination more efficient.
Data Source
AI summary
The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.