WLAN Channel Allocation via Beacon Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing use of wireless local area networks (WLANs) leads to performance degradation due to channel overlap between adjacent basic service sets (BSSs), causing collisions and interference, which existing technologies struggle to mitigate effectively.
Innovation Solution
A method for allocating channels between adjacent BSSs, involving the exchange of scheduling information and resource-related data through frames, such as beacon and resource allocation frames, to coordinate non-overlapping channels and transmission periods, ensuring efficient resource utilization and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channels are allocated to adjacent BSSs without coordination, then channel allocation is simple, but collisions and interference occur causing performance degradation
Solution Approach 1:
The patent applies preliminary action by having access points transmit beacon frames containing scheduling information before actual data transmission occurs. This allows adjacent BSSs to coordinate their channel usage in advance, preventing collisions and interference before they happen, thereby improving reliability without requiring complex real-time coordination mechanisms
Solution Approach 2:
The patent implements feedback through the exchange of beacon frames and resource allocation frames between adjacent access points. Each access point receives scheduling information from neighbors and adjusts its transmission timing accordingly, creating a closed-loop coordination system that prevents channel conflicts while maintaining manageable complexity
2Productivity
If channel overlap is allowed between adjacent BSSs, then resource utilization is high, but interference and collisions increase
Solution Approach 1:
The patent applies periodic action by organizing channel coordination into regular beacon intervals. Access points transmit beacon frames periodically to announce their scheduling intentions, allowing overlapping channels to be utilized efficiently while preventing interference through time-division multiplexing within each beacon period
Solution Approach 2:
The patent implements dynamics by allowing flexible transmission timing adjustments based on real-time scheduling information exchanged between access points. The system dynamically adapts transmission schedules to optimize resource utilization while avoiding conflicts, rather than using fixed static allocation
3Reliability
If scheduling information is exchanged between access points, then channel coordination is improved, but message transmission overhead increases
Solution Approach 1:
The patent applies universality by designing beacon frames to serve multiple functions: they announce scheduling information, confirm channel availability, and coordinate transmission timing all within a single frame type. This multi-functionality reduces the number of separate communication messages needed, minimizing overhead while maintaining reliable coordination
Solution Approach 2:
The patent merges channel coordination functions into existing beacon frame transmissions rather than creating separate dedicated coordination channels. By combining scheduling information exchange with routine beacon broadcasting, the system avoids additional transmission overhead while achieving reliable channel coordination
Data Source
AI summary
A method and apparatus for allocating a channel in a wireless local area network (WLAN) is disclosed. The method includes receiving a first frame including scheduling information with respect to a first interval from a second access point, generating a second frame including resource related information required for transmission and reception during a second interval which is continuous to the first interval, and transmitting the second frame to the second access point. Accordingly, performance of the WLAN can be improved.