Bounded Power-Save-Polling Logic for WLAN Coexistence Interference
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Solution Overview
Problem
Coexistence interference between wireless technologies in combo devices, such as WLAN and WiMAX, leads to reduced channel utilization and potential data transmission failures due to the avalanche effect and out-of-band emissions, with existing protection mechanisms like CTS2Self reducing efficiency and channel utilization.
Innovation Solution
Implementing bounded Power-Save-Poll (BPS) logic to confine PS-Poll transmissions to specific windows within the medium grant duration, allowing for early or delayed PS-Poll transmission based on BT activity to minimize CTS2Self frames and maximize channel utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CTS2Self mechanism is used to protect BT and WLAN performance, then the avalanche effect is avoided, but channel utilization is greatly reduced
Solution Approach 1:
The STA sends a CTS2Self frame in advance before BT activity to reserve the channel, preventing other STAs from transmitting during the upcoming BT operation. This preliminary reservation avoids the avalanche effect while minimizing the duration of channel blockage, thereby improving overall channel utilization compared to reactive protection mechanisms.
2Productivity
If PS mode is used to reduce CTS2Self frames, then channel utilization improves, but AP response delay causes data transmission failures
Solution Approach 1:
The STA sends a PS-Poll frame in advance to wake the AP and indicate readiness to receive data. This preliminary action ensures the AP is prepared and can immediately transmit data upon receiving the PS-Poll, eliminating the AP response delay that causes transmission failures while maintaining the channel utilization benefits of PS mode.
Solution Approach 2:
The PS-Poll frame acts as an intermediary signal between the STA and AP, coordinating their operations. The PS-Poll mediates the interaction by notifying the AP of the STA's wake state and data readiness, enabling synchronized transmission that avoids both the avalanche effect and AP response delays.
3Object-affected harmful factors
If PS-Poll transmission is delayed to avoid BT activity, then coexistence interference is reduced, but data transmission latency increases
Solution Approach 1:
The system dynamically adjusts PS-Poll transmission timing based on BT activity patterns. By monitoring BT operation schedules, the STA can transmit PS-Poll frames during intervals when BT is inactive, minimizing coexistence interference while maintaining acceptable data transmission latency through adaptive scheduling rather than fixed delays.
Data Source
AI summary
In accordance with at least some embodiments, a system comprises an access point and a station in communication with the access point. The station has at least two network technology subsystems subject to coexistence interference. The station selectively implements bounded Power Save (PS)-Polling (BPS) logic to handle communications between the station and the access point. The BPS logic operates to confine PS-Poll transmissions starts to one of two separate windows during a medium grant duration of the station.