WLAN Mesh Beacon Scheduling via Time Slot Segmentation
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Solution Overview
Problem
The IEEE 802.11s standard for WLAN mesh communication systems does not specify intervals for transmitting and receiving beacon messages, leading to potential collisions and interference, which deteriorate the communication system's performance.
Innovation Solution
A method and apparatus for scheduling in WLAN mesh communication systems, where a predetermined period is divided into intervals for transmitting and receiving beacon messages, with priority-based intervals to prevent collisions and ensure normal message transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If beacon messages are transmitted periodically without scheduled intervals, then the transmission simplicity is maintained, but message collisions and interference occur
Solution Approach 1:
The beacon period is segmented into distinct transmission intervals and reception intervals. Each MAP is assigned specific time slots for transmitting beacon messages and other time slots for receiving beacon messages from neighboring MAPs. This segmentation prevents simultaneous transmission and reception conflicts, eliminating message collisions while maintaining periodic transmission for simplicity.
2Area of stationary object
If beacon messages are transmitted by all MAPs simultaneously, then the coverage area is maximized, but interference and collisions increase
Solution Approach 1:
The system implements periodic beacon message transmission with scheduled intervals. Each MAP transmits beacon messages at specific periodic time slots rather than simultaneously. This periodic action with staggered timing ensures that all MAPs maintain coverage area while avoiding simultaneous transmissions that cause interference and collisions.
3Device complexity
If no scheduling method is implemented, then the system complexity is reduced, but communication performance deteriorates
Solution Approach 1:
The scheduling method is pre-configured and established before beacon message transmission begins. Each MAP is assigned predetermined transmission intervals and reception intervals in advance. This preliminary action defines the scheduling framework upfront, avoiding the need for complex real-time scheduling decisions while ensuring optimal communication performance through pre-planned time slot allocation.
Data Source
AI summary
A method and apparatus for scheduling in a Wireless Local Area Network (WLAN) mesh communication system including a plurality of Mesh Access Points (MAPs) are provided, in which, when a message to be transmitted from a first MAP of the MAPs to MAPs adjacent to first MAP is generated, setting a first interval for transmitting the generated message during a predetermined period, and setting a remaining interval excluding the first interval during the predetermined period as a second interval for receiving messages from the adjacent MAPs.