Relay Station Bandwidth Request Reporting in Multihop BWA
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Solution Overview
Problem
In multihop relay Broadband Wireless Access (BWA) communication systems, existing technologies face challenges in efficiently processing bandwidth requests due to the inability of relay stations to accurately report the number of bandwidth request ranging codes to base stations, leading to potential code collisions and resource wastage.
Innovation Solution
A method and apparatus where a relay station receives bandwidth request ranging codes from subordinate stations, determines the number, and reports this information to the base station using a modified resource allocation message with zero-filled fields, allowing the base station to generate and transmit resource allocation messages that are updated by the relay station for distribution to the stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the relay station relays the ranging code over the ranging region allocated to the terminal, then the terminal can request bandwidth, but the base station cannot distinguish whether the ranging code is received from the terminal or the relay station
Solution Approach 1:
The patent segments the ranging code into two distinct parts: terminal ranging codes and relay station ranging codes. The relay station uses a dedicated ranging code that is separate from terminal ranging codes, allowing the base station to clearly identify the source of each ranging code and perform appropriate processing for terminal bandwidth requests.
2Measurement precision
If the ranging code is divided into terminal ranging code and relay station ranging code, then source discrimination is feasible, but the probability of code collision increases due to reduced available codes
Solution Approach 1:
The patent introduces a new dimension for code organization by allocating specific ranging codes to relay stations based on their identity or configuration. This dimensional separation in the code space allows for clear source discrimination while maintaining a sufficient pool of available codes for terminals, thereby reducing code collision probability.
3Loss of information
If a ranging region dedicated to the relay station is used, then the relay station can report terminal information, but resource wastage occurs
Solution Approach 1:
The patent makes the relay station's ranging code serve multiple functions: it acts as both the relay station's own ranging code for bandwidth requests and as an identifier for reporting terminal information. This multi-functionality eliminates the need for a separate dedicated ranging region, thereby preventing resource wastage while maintaining full reporting capability.
Data Source
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AI summary
Apparatuses and methods for processing a bandwidth request in a multihop relay Broadband Wireless Access (BWA) communication system are provided. A communication method of a Relay Station (RS) includes determining a number of bandwidth request ranging codes received from Subscriber Stations (SSs); and reporting the number of the bandwidth request ranging codes to a Base Station (BS). A communication method of the BS includes allocating a resource to an RS to report on a number of detected bandwidth request ranging codes; and receiving a report on the number of the bandwidth request ranging codes using the allocated resource.