WLAN WPAN Coexistence Interference Mitigation During Authentication
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Solution Overview
Problem
Coexistence interference between WLAN and WPAN interfaces during WLAN authentication processes in wireless devices, particularly due to shared radio frequency bands, leads to reduced reliability and potential failure in establishing secure encrypted connections, as existing coexistence algorithms like CTS2Self and power save modes are ineffective during critical message exchanges with timeouts.
Innovation Solution
Implementing alternating time periods for WLAN and WPAN transmissions during the authentication process, where WLAN time periods allow for message exchange and WPAN time periods accommodate data communication, based on WPAN profiles and authentication message reception or timers, to minimize interference and ensure timely message exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If WLAN and WPAN interfaces transmit simultaneously on shared radio frequency bands, then device productivity is maintained, but coexistence interference increases causing authentication failure
Solution Approach 1:
The patent segments the transmission time into distinct WLAN time periods and WPAN time periods, alternating between them during the authentication process. This temporal segmentation ensures that WLAN authentication messages are transmitted without WPAN interference while maintaining overall device productivity through efficient time utilization.
Solution Approach 2:
The patent implements periodic action by establishing a repeating pattern of WLAN transmission periods followed by WPAN transmission periods. This periodic alternation continues through the authentication process, creating predictable time slots that ensure reliable message exchange while maintaining device functionality.
2Device complexity
If existing coexistence algorithms like CTS2Self and power save modes are used, then device complexity is reduced, but they are ineffective during critical message exchanges with timeouts
Solution Approach 1:
The patent applies preliminary action by establishing dedicated time periods in advance for WLAN authentication message exchange before actual transmission occurs. The system pre-configures the timing structure based on expected authentication duration and WPAN profile requirements, ensuring critical messages are transmitted without interference before timeouts can occur.
Solution Approach 2:
The patent changes the temporal parameters of transmission by adjusting time period durations based on WPAN profiles and authentication progress. The system dynamically modifies timing parameters to accommodate different WPAN operations while ensuring WLAN authentication messages are transmitted within critical time windows, overcoming the limitations of static coexistence algorithms.
3Reliability
If WPAN time periods are extended to accommodate data communication, then WPAN connection performance is maintained, but WLAN authentication message exchange time is delayed
Solution Approach 1:
The patent implements dynamics by making the time period durations adjustable rather than fixed. The system dynamically adapts the length of WPAN time periods based on actual WPAN data communication requirements and the WPAN profile in use, while ensuring that WLAN authentication critical periods are maintained. This dynamic adjustment allows optimization of both WPAN performance and authentication speed.
Solution Approach 2:
The patent employs feedback mechanisms where the system monitors authentication progress and WPAN communication status to adjust time period allocations in real-time. Based on feedback from authentication message exchange status and WPAN data buffer conditions, the system optimizes time period durations to minimize overall authentication time while ensuring WPAN data communication is properly accommodated.
Data Source
AI summary
Methods and apparatuses for mitigating coexistence interference in a wireless device between a WLAN interface and a WPAN interface during a WLAN authentication process. The wireless device associates with a WLAN access point (AP), and after receiving a WLAN association response from the WLAN AP, the wireless device alternates between WLAN time periods, during which WLAN transmission is enabled and WPAN transmission is disabled, and WPAN time periods, during which WPAN transmission is enabled and WLAN transmission is disabled, during the WLAN authentication process. Durations of the WPAN time periods are based at least in part on a WPAN profile, e.g., a Bluetooth profile, in use by the wireless device. Durations of the WLAN time periods are based at least in part on receipt of WLAN authentication messages from the WLAN AP during the authentication process or expiration of WLAN authentication process timers.