Subscriber Station Identification via BR Index and STID
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Solution Overview
Problem
In mobile broadband systems, base stations struggle to uniquely identify subscriber stations sharing the same station identifier (STID) during bandwidth requests, leading to resource allocation failures due to size constraints in quick access messages.
Innovation Solution
Assigning unique bandwidth request (BR) indexes to subscriber stations, either shared or single, based on their STID, allowing the base station to differentiate and allocate resources accurately through the BR index and STID combination in the quick access message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the base station assigns the same STID to multiple subscriber stations to support a large number of stations, then the system capacity is improved, but the base station fails to uniquely identify the subscriber station during bandwidth requests
Solution Approach 1:
The patent segments the identification process into two distinct components: STID (station identifier) and BR index (bandwidth request index). The STID identifies the subscriber station, while the BR index uniquely identifies the bandwidth request opportunity. This segmentation allows multiple stations to share the same STID while maintaining unique identification through the combination of STID and BR index, resolving the contradiction between supporting many stations and maintaining identification accuracy.
2Quantity of substance
If the quick access message includes only STID and BR index without additional identification fields, then the message size is reduced, but the base station cannot differentiate between multiple stations sharing the same STID
Solution Approach 1:
The patent introduces the BR index as an intermediary element that mediates between the limited message size constraint and the need for station differentiation. The BR index acts as a unique identifier for each bandwidth request opportunity, allowing the base station to differentiate between multiple stations sharing the same STID without increasing the message size beyond the fixed structure. The combination of STID and BR index provides sufficient differentiation capability within the constrained message format.
3Adaptability or versatility
If the base station uses a three-step BR procedure with random BR opportunity selection, then the system supports dynamic resource allocation, but stations sharing STID cannot be uniquely identified when sending bandwidth requests
Solution Approach 1:
The patent applies preliminary action by pre-assigning unique BR indices to each subscriber station during the connection establishment phase. This pre-assignment ensures that when stations send bandwidth requests at random opportunities, the base station can immediately identify the originating station using the pre-configured BR index associated with each STID-BR index pair, maintaining identification accuracy while preserving dynamic resource allocation capabilities.
Data Source
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AI summary
A method and apparatus identify a subscriber station during a bandwidth request procedure. In one embodiment, a method of identifying a subscriber station from a quick access message includes receiving the quick access message from the subscriber station connected to a base station, where the quick access message includes a station identifier (STID) and a bandwidth request (BR) index assigned to the subscriber station. The method also includes determining whether the STID in the quick access message is assigned to multiple subscriber stations. Furthermore, the method includes identifying a subscriber station associated with the quick access message using the BR index in conjunction with the STID if the STID is assigned to the multiple subscriber stations. Moreover, the method includes performing an action identified by the BR index for the identified subscriber station in response to the quick access message.