Wireless Station Scheduling Mechanism for Contention-Based Access Periods
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently managing contention-based access periods within beacon intervals, particularly in allocating transmission opportunities between multiple stations, which can lead to inefficiencies and conflicts due to the lack of precise priority and timing mechanisms.
Innovation Solution
Implementing a scheduling mechanism within beacon frames that allocates specific contention-based access periods (CBAPs) with defined priorities and timing, allowing only designated stations to transmit immediately after a predetermined idle period, while others wait for a longer period or a back-off period, ensuring efficient data transfer during Data Transfer Times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple stations are allowed to transmit during CBAP without precise scheduling, then channel access flexibility is improved, but transmission conflicts and network efficiency deteriorate
Solution Approach 1:
The patent applies preliminary action by allocating CBAP parameters (such as CBAP start time, duration, and station-specific transmission opportunities) in advance through beacon frames. This pre-scheduling allows stations to know their transmission rights beforehand, preventing conflicts while maintaining flexibility. The coordinator station distributes time resources ahead of time, so stations can access the channel flexibly within their allocated windows without causing collisions.
Solution Approach 2:
The patent implements dynamics by making the CBAP allocation adaptable to changing network conditions. The coordinator can dynamically adjust CBAP parameters in each beacon interval based on current traffic demands and station requirements. This allows the system to balance between structured access (for efficiency) and flexible allocation (for adaptability), resolving the contradiction between rigid scheduling and flexible access.
2Ease of operation
If contention-based access is allowed during CBAP, then ease of operation is improved, but transmission conflicts and latency increase
Solution Approach 1:
The patent applies segmentation by dividing the CBAP into multiple sub-periods or transmission opportunities assigned to different stations. Instead of allowing all stations to contend simultaneously (which causes conflicts and latency), the CBAP is segmented into time-multiplexed slots. Each station has a designated opportunity within the CBAP, maintaining ease of operation through simple access rules while eliminating conflicts and reducing latency through structured time division.
3Device complexity
If no scheduling mechanism is used in beacon frames, then device complexity is reduced, but priority management and timing precision deteriorate
Solution Approach 1:
The patent introduces an intermediary scheduling mechanism in the beacon frame that acts as a mediator between the coordinator and stations. This intermediary layer provides timing precision and priority management information to stations without requiring complex distributed coordination algorithms. The beacon frame serves as the intermediary carrier of scheduling information, achieving precise timing control while keeping individual station complexity low.
Data Source
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AI summary
Some demonstrative embodiments include devices, systems and/or methods of communicating during a Contention-Based-Access-Period (CBAP). For example, a device may include a wireless communication station to transmit a wireless communication transmission over a wireless communication medium upon determining that the wireless communication medium is idle for a predefined time period within a contention-based-access period (CBAP), if a scheduling element allocating the CBAP includes an indication of an identity of the wireless communication station in a predefined field.