WLAN Coexistence with WPAN PAwR Empty Payloads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coexistence of WLAN and WPAN systems in a shared wireless medium leads to interference, with passive isolation methods becoming challenging due to shrinking device sizes, and existing time division multiplexing techniques do not fully optimize WLAN performance during WPAN periodic advertisement with responses (PAwR).
Innovation Solution
A coexistence management component determines whether WPAN sub-systems transmit empty payload advertisement packets, allowing WLAN sub-systems to utilize the shared medium during WPAN sub-events with empty payloads, thereby optimizing WLAN performance without degrading WPAN performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If passive isolation methods are used to reduce interference between WLAN and WPAN sub-systems, then interference is reduced, but device size increases and power consumption increases
Solution Approach 1:
The patent replaces passive physical isolation mechanisms with an active time-division multiplexing protocol. The coexistence manager actively controls medium access by dividing time into slots, allowing WPAN sub-systems to transmit during designated periods while blocking WLAN sub-systems, and vice versa. This software-based time slicing eliminates the need for physical shielding and isolation structures, reducing device size while maintaining interference reduction.
Solution Approach 2:
The patent implements dynamic time-slot allocation where the coexistence manager continuously monitors and adjusts medium access rights based on current transmission needs. The system dynamically switches between allowing WPAN or WLAN access depending on which sub-system has data to transmit, optimizing the balance between the two protocols without requiring fixed physical isolation structures.
2Object-affected harmful factors
If time division multiplexing is used to manage co-existence, then interference is reduced, but WLAN performance is not fully optimized during WPAN periodic advertisement with responses
Solution Approach 1:
The patent enhances the static time-division approach with dynamic adjustments specific to PAwR operations. When the WPAN sub-system is performing periodic advertisement with responses, the coexistence manager identifies these intervals and temporarily suspends WPAN medium access requests. This allows the WLAN sub-system to utilize the shared medium during advertisement phases when WPAN does not need to transmit, thereby optimizing WLAN performance without degrading WPAN's ability to establish connections.
Solution Approach 2:
The patent leverages the periodic nature of WPAN advertisement with responses to create predictable windows for WLAN transmission. By recognizing the periodic advertisement intervals, the coexistence manager schedules WLAN medium access to occur during these periods when WPAN is naturally inactive, maximizing WLAN productivity while maintaining WPAN's periodic connection establishment function.
3Reliability
If WPAN sub-systems transmit advertisement packets with payloads, then communication establishment is ensured, but WLAN access to shared medium is blocked during advertisement phases
Solution Approach 1:
The patent segments the WPAN advertisement process into distinct phases: advertisement transmission phases when WPAN must communicate connection establishment information, and response/listening phases when WPAN is receiving or processing responses. The coexistence manager uses this segmentation to allow WLAN medium access during response phases when WPAN is not actively transmitting advertisement packets, thereby maintaining both reliable WPAN communication establishment and WLAN productivity.
Solution Approach 2:
The patent implements preliminary blocking of WPAN medium access requests during advertisement phases before WLAN transmission can occur. The coexistence manager preemptively suspends WPAN transmission attempts during designated advertisement windows, ensuring that WLAN sub-systems can access the shared medium without interference. This preliminary action maintains WPAN's ability to establish communications while preventing it from blocking WLAN access during critical advertisement periods.
Data Source
AI summary
Methods and systems for improving wireless local area network performance during periodic advertisement with response protocol. The disclosed method includes, among other things, receiving, by a wireless local area network (WLAN) sub-system of a wireless device, a signal associated with a sub-event of an advertisement event from a wireless personal area network (WPAN) sub-system of the wireless device, wherein the WLAN sub-system and the WPAN sub-system share a frequency band, determining whether a priority bit associated with the sub-event indicates whether during the sub-event empty payload will be transmitted, and in response to determining that the priority bit indicates that during the sub-event an empty payload will be transmitted, utilizing, by the WLAN sub-system, the frequency band for a predetermined amount of time allocated to the sub-event.