Relay Station Dedicated Access Zone Allocation
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Solution Overview
Problem
Current Broadband Wireless Access (BWA) communication systems, such as IEEE 802.16e, face challenges in providing efficient communication services due to low flexibility in wireless network configuration, especially in environments with changing traffic distribution or interference, which affects the quality of service and coverage area.
Innovation Solution
A method and apparatus for allocating a dedicated access zone to a Relay Station (RS) performing distributed scheduling in a multihop relay wireless communication system, allowing the RS to request and allocate necessary bandwidth resources for communication with a Mobile Station (MS), thereby enhancing communication quality and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multihop relay scheme is adopted to improve network flexibility and coverage, then adaptability and coverage area are improved, but system complexity increases due to additional relay stations and scheduling mechanisms
Solution Approach 1:
The patent segments the network into Base Station (BS) and Relay Station (RS) components, allowing independent management and scheduling. The BS handles macro-level resource allocation while RS handles micro-level access scheduling, dividing the complex scheduling task into manageable segments that improve flexibility without overwhelming system complexity
Solution Approach 2:
The Relay Station acts as an intermediary between the Base Station and Mobile Stations, enabling indirect communication paths. This intermediary role allows the system to expand coverage and improve adaptability while the BS maintains overall control through dedicated access zone allocation, preventing unmanageable complexity
2Reliability
If dedicated access zones are allocated to relay stations to reduce interference, then communication quality improves, but resource allocation complexity increases
Solution Approach 1:
The patent implements local quality by allocating dedicated access zones specifically to relay stations in areas where interference occurs. Instead of uniform resource allocation, the BS grants time-frequency resources exclusively to RS for communicating with specific MS, reducing interference locally while maintaining overall system efficiency
Solution Approach 2:
The Base Station performs preliminary action by pre-allocating dedicated access zones to relay stations before interference problems manifest. The BS anticipates potential interference scenarios and proactively assigns exclusive resources to RS-MS pairs, preventing communication quality degradation before it occurs
3Adaptability or versatility
If distributed scheduling is implemented at relay stations to enhance flexibility, then adaptability improves, but coordination overhead increases
Solution Approach 1:
The scheduling function is segmented between BS and RS. The BS performs macro-scheduling by allocating dedicated access zones in advance, while RS performs micro-scheduling within those zones. This segmentation allows RS to have scheduling flexibility for immediate access decisions while the BS maintains overall coordination, balancing adaptability with manageable overhead
Solution Approach 2:
The Base Station performs preliminary scheduling action by allocating dedicated access zones to relay stations before the actual communication occurs. This preliminary allocation reduces the coordination overhead during real-time operation, as RS only needs to operate within pre-defined resource boundaries rather than negotiating resources dynamically
Data Source
AI summary
An apparatus and a method for allocating a dedicated access zone to a Relay Station (RS) in a multihop relay Broadband Wireless Access (BWA) communication system are provided. A communicating method of the RS includes relaying communications between a Base Station (BS) and a Mobile Station (MS), determining whether a dedicated resource is necessary for the communications with the MS, when the dedicated resource is necessary, generating a dedicated access zone request message which comprises necessary bandwidth information and transmitting the dedicated access zone request message to the BS.