WLAN Station Event Request Cancellation During ESS Handover
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Solution Overview
Problem
Current wireless network management procedures for WLANs face inefficiencies in handling event reporting and diagnostic requests, particularly when stations move between Extended Service Sets (ESS) or Independent BSS (IBSS), leading to resource wastage and incomplete information processing.
Innovation Solution
The proposed solution involves a management procedure where stations cancel outstanding event requests and delete pending data when moving to a different ESS, and transmit event reports without available data, ensuring efficient resource utilization and accurate information handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If stations continue to process outstanding event requests when moving to a different ESS, then event reporting completeness is improved, but network resource wastage increases and management efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by requiring stations to cancel outstanding event requests and delete pending event report frames before moving to a different ESS. This pre-cancellation prevents wasted processing of obsolete requests and eliminates the need to filter out invalid reports later, improving overall network management efficiency while maintaining reporting completeness for the new ESS
Solution Approach 2:
The patent applies discarding and recovering by instructing stations to discard (cancel and delete) outstanding event requests and pending report frames when transitioning to a new ESS. This eliminates resources tied to the old ESS, allowing the station to fully utilize its capabilities for event reporting in the new ESS without carrying over obsolete processing burdens
2Productivity
If stations transmit event reports without available data, then resource utilization is improved, but information accuracy may deteriorate
Solution Approach 1:
The patent applies inversion by reversing the conventional approach: instead of only transmitting event reports when data is available, the system transmits event report frames even when no event data is available, using an empty event report element list to indicate the absence of events. This ensures continuous resource utilization and maintains reporting discipline while clearly communicating the lack of events through the structured empty response
3Loss of information
If stations store the last 5 events for all supported event report elements, then event reporting completeness is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing event storage and reporting capabilities selectively for each event report element type that a station supports, rather than uniformly for all possible event types. Each station determines its supported event report elements and maintains storage for the last 5 events only for those specific types, reducing memory and processing requirements while maintaining completeness for locally supported events
Data Source
AI summary
Provided are WLAN system management procedure and a station supporting the procedure. In the management procedure, a station receives one or more event request frames each of which includes zero or more event request elements, wherein each of the event request elements comprises an event type field for specifying the event type of an event request. After reception, if the station moves to a different Extended Service Set (ESS), the station cancels all outstanding event requests of the event request frames and deletes all pending event report frames and event data.