Wireless Access Point Scheduling for Band Flexibility and Delay Reduction
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Solution Overview
Problem
Current wireless communications systems face inefficiencies due to the limitations of existing scheduling access modes, which either use contention access on all frequency bands or scheduling access on all bands, leading to high delays and collisions, especially as the number of terminals increases, and lack flexibility and overhead.
Innovation Solution
A method where an access point sends a scheduling request to a scheduling server for frequency band allocation based on data transmission requirements, allowing for the coexistence of scheduling and contention access by determining the appropriate access mode and frequency band usage, considering factors like service priority, data capacity, and interference information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contention access is used on all frequency bands, then the system operates on non-authorized frequency bands with full flexibility, but delays and collisions increase drastically as the number of terminals grows
Solution Approach 1:
The frequency spectrum is segmented into multiple bands, with different access modes applied to different segments. High-priority traffic uses scheduling access on dedicated frequency bands, while low-priority traffic uses contention access on other bands, resolving the contradiction between flexibility and delay
Solution Approach 2:
The access mode is made dynamic and adjustable based on traffic conditions. The system can switch between contention access and scheduling access dynamically, allowing flexibility when needed while reducing delays when traffic load increases
2Loss of time
If scheduling access is used on all frequency bands, then delays and collisions are reduced, but the system loses flexibility and requires more signaling overhead
Solution Approach 1:
Different quality characteristics are applied locally to different frequency bands and traffic types. Scheduling access with its structured signaling is applied only where needed (high-priority traffic), while contention access with minimal signaling is used elsewhere, reducing overall overhead while maintaining delay performance
3Productivity
If existing scheduling access mode is introduced in WLAN system based on contention access signaling design, then scheduling capability is added, but overheads and flexibility are inevitably limited
Solution Approach 1:
The access point is designed with multi-functionality, capable of operating in both contention access mode and scheduling access mode. This universal design allows the system to adapt to different traffic requirements and frequency band conditions, overcoming the limitations of dedicated scheduling access designs
Data Source
AI summary
A method includes sending, by an access point, a scheduling request to a first scheduling server according to a data transmission requirement, where the scheduling request includes frequency band bandwidth information of a contention frequency band that is applied for and frequency band use time information of the contention frequency band that is applied for. The method also includes receiving, by the access point, a contention frequency band that is allocated by the first scheduling server to the access point according to a spectrum list and the scheduling request, where the spectrum list includes at least frequency band use information and interference information of the access point. The method also includes performing, by the access point, scheduling transmission by using the allocated contention frequency band.