Multi-Protocol Station Frame Timing for Bluetooth Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless local-area networks, the coexistence of stations operating with different protocols like IEEE 802.11 and Bluetooth leads to collisions due to the difficulty in coordinating synchronous connection-oriented Bluetooth transmissions with IEEE 802.11 frames, especially when the access point transmits frames simultaneously with Bluetooth packets, causing interference and inefficiencies.
Innovation Solution
A technique where a multi-protocol station requests IEEE 802.11 frames from an access point, timing these requests to fall between Bluetooth messages, using PS_Poll or Clear_to_Send frames with an info-address and NAV protection to manage potential interference, allowing for seamless coexistence without channel contention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-protocol station transmits Bluetooth synchronous connection oriented packets at high data rates, then voice communication quality is improved, but collisions with IEEE 802.11 frames increase
Solution Approach 1:
The patent applies preliminary action by having the access point proactively queue IEEE 802.11 frames before Bluetooth SCO transmissions occur. The access point monitors Bluetooth transmission schedules and pre-queues incoming IEEE 802.11 frames during identified quiet periods, ensuring frames are ready for immediate transmission when Bluetooth activity completes, thus preventing collisions while maintaining voice quality
Solution Approach 2:
The access point acts as an intermediary between Bluetooth and IEEE 802.11 protocols. It receives and queues IEEE 802.11 frames, monitors Bluetooth transmission schedules, and strategically transmits queued frames during Bluetooth quiet periods. This intermediary role coordinates the two protocols, preventing direct collisions while maintaining both voice communication quality and data frame delivery
2Productivity
If IEEE 802.11 frames are transmitted simultaneously with Bluetooth packets, then channel utilization is improved, but frame corruption and collisions increase
Solution Approach 1:
The access point performs preliminary queuing of IEEE 802.11 frames during Bluetooth transmission activities. By pre-positioning frames in the queue during identified quiet periods between Bluetooth SCO transmissions, the system prepares for efficient simultaneous operation without actual simultaneous transmission, thus maintaining both channel utilization and frame transmission success
Solution Approach 2:
The patent implements periodic action by transmitting IEEE 802.11 frames at regular intervals determined by Bluetooth SCO transmission patterns. The access point identifies periodic quiet periods between Bluetooth voice packets and schedules IEEE 802.11 frame transmissions during these intervals, creating a rhythmic coordination pattern that maintains high channel utilization while preventing collisions
Data Source
AI summary
A technique is disclosed involves a station (e.g., an IEEE 802.11 station, etc.) requesting that one or more frames be transmitted from an access point to the station. The station might have been in power save mode during Bluetooth operation for the purpose of causing the access point to queue frames that are intended for the station. The station making the request is collocated with the Bluetooth station or is, in fact, a single station that supports two protocols (i.e., has two parts), and is able to determine the regular timing of the Bluetooth synchronous connected oriented (SCO) packet transmissions. The requests to the access point for IEEE 802.11 frames are timed to cause the access point response frames to fall between the Bluetooth messages, thus managing potential interference.