Ranging Regions for Wireless Relay Stations
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Solution Overview
Problem
Current wireless communication systems employing relay stations face inefficiencies in ranging functions, channel quality reporting, and retransmission control, particularly in multi-hop networks like IEEE 802.16, leading to suboptimal resource utilization and performance degradation.
Innovation Solution
A unique ranging technique is introduced where each relay station and base station has a dedicated ranging region with specific resources, allowing mobile stations to initiate ranging and receive transmission adjustments directly from the relay station, which can then communicate these adjustments to the base station, optimizing synchronization and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay stations are employed to extend coverage area, then communication distance and coverage area are improved, but resource utilization efficiency and system performance deteriorate due to inefficient ranging functions and control mechanisms
Solution Approach 1:
The patent divides the coverage area into distinct ranging regions, each associated with a specific relay station or base station. Mobile stations perform ranging functions with the appropriate relay station based on which ranging region they are in, enabling localized resource allocation and improving overall resource utilization efficiency while maintaining extended coverage.
Solution Approach 2:
Different ranging regions have different resource allocations and control mechanisms tailored to their specific needs. Each relay station manages its own ranging region with dedicated resources, allowing for optimized local resource utilization while contributing to the overall extended coverage area of the network.
2Length of stationary object
If relay stations are introduced to improve coverage, then communication range is extended, but system complexity increases due to multiple hops and coordination requirements
Solution Approach 1:
Relay stations serve as intermediaries between mobile stations and base stations, simplifying the overall system architecture. Each relay station independently manages its associated ranging region and performs ranging functions, reducing the coordination complexity that would otherwise exist between mobile stations and distant base stations across multiple hops.
Solution Approach 2:
The system segments the communication network into independent ranging regions, each managed by a specific relay station. This segmentation allows each relay station to operate semi-independently, reducing the overall system complexity by distributing control functions rather than requiring centralized coordination across the entire multi-hop network.
3Extent of automation
If base station controls all ranging functions in multi-hop networks, then centralized control is maintained, but resource allocation efficiency and performance degrade
Solution Approach 1:
The patent segments the ranging control function by creating distinct ranging regions associated with each relay station. Mobile stations perform ranging with their local relay station rather than requiring base station involvement for each ranging operation, significantly improving resource allocation efficiency while maintaining overall system coordination.
Solution Approach 2:
Relay stations autonomously manage ranging functions within their assigned ranging regions. Each relay station independently allocates resources and performs ranging operations with mobile stations in its region, eliminating the need for base station involvement in every ranging transaction and thereby improving resource allocation efficiency.
Data Source
AI summary
One embodiment of the present invention provides a unique ranging technique in wireless communication environments that employ relay stations associated with a base station. Each relay station, and optionally the base station itself, can be allocated a unique ranging region having unique ranging resources that may be used by a mobile station to initiate a ranging function with the corresponding relay station or base station.