WPAN-WLAN Traffic Arbitration for Overlapping Channels
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Solution Overview
Problem
Coexistence of WLAN and WPAN protocols with overlapping channels leads to performance degradation for WPAN due to aggressive medium access policies of WLAN, resulting in starved access and increased latency.
Innovation Solution
A combined traffic arbitrator facilitates simultaneous transmission of data using overlapping channels by leveraging WLAN channel assessment to enable immediate WPAN transmission without additional backoff events, reducing power consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WLAN protocol uses aggressive medium access parameters to ensure its transmission access, then WLAN transmission reliability is improved, but WPAN protocol access to transmission medium is starved and performance deteriorates
Solution Approach 1:
The patent combines WLAN and WPAN protocol operations under a unified traffic arbitrator that coordinates channel access for both protocols. The arbitrator merges the channel assessment functions and backoff mechanisms into a single coordinated system, allowing WPAN to leverage WLAN's channel availability detection while maintaining fair access rights for both protocols.
Solution Approach 2:
The traffic arbitrator acts as an intermediary between WLAN and WPAN protocols, mediating their competing access requests. It receives transmission requests from both protocols, coordinates their access based on channel availability, and ensures that WPAN gains fair access opportunities without compromising WLAN's transmission reliability.
2Reliability
If WPAN protocol performs independent channel scanning and backoff events before transmission, then channel access reliability is improved, but transmission latency increases and power consumption increases
Solution Approach 1:
The WLAN protocol performs preliminary channel assessment actions that WPAN can leverage. Instead of WPAN independently scanning the channel and performing backoff events, it utilizes the WLAN's preliminary channel availability detection results, eliminating redundant scanning and reducing access latency while maintaining reliability.
Solution Approach 2:
The WLAN channel assessment mechanism serves multiple functions: it ensures channel availability for WLAN transmissions and simultaneously provides channel status information for WPAN protocol access decisions. This multi-functionality eliminates the need for separate WPAN channel scanning, reducing latency and power consumption.
3Reliability
If WPAN protocol performs independent channel scanning and backoff events before transmission, then channel access reliability is improved, but power consumption increases
Solution Approach 1:
WLAN performs preliminary channel assessment that WPAN can reuse. By leveraging WLAN's preliminary channel availability detection, WPAN avoids performing its own independent channel scanning and backoff events, thereby reducing power consumption while maintaining channel access reliability.
Solution Approach 2:
The WLAN protocol's channel assessment mechanism serves both its own access needs and WPAN's access needs. WPAN benefits from WLAN's channel status detection without needing to independently perform energy-consuming scanning operations,实现ing a form of self-service where one protocol's operations benefit another.
Data Source
AI summary
A traffic arbitration technique enables a wireless personal area network (WPAN) protocol to use channel assessment performed by a wireless personal area network protocol (WLAN) and to transmit associated data immediately following completion of a WLAN transmission without an intervening channel assessment or backoff event. This technique reduces power consumption and latency introduced by backoff events of coexistence techniques of the WPAN protocol and increases intermittent transmission of WPAN data. The WPAN protocol may enter a sleep mode after transmission thereby further reducing power consumption of a system with co-located wireless communications protocols.