Wireless Interference Feedback Frames for WLAN Throughput
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Solution Overview
Problem
Wireless communications are affected by interference from in-device coexisting radios, such as Bluetooth transmitters, which degrade wireless transmission throughput in devices using WLAN transmitters.
Innovation Solution
A wireless device generates frames with feedback fields indicating unavailability due to interference, using specific formats in Buffer Status Report Poll (BSRP) and Multi-Station Block Acknowledgement (BA) frames to manage interference and optimize transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-device coexisting radios (e.g., Bluetooth transmitter) operate simultaneously with WLAN transmitter, then device functionality is enhanced, but wireless transmission throughput is degraded due to interference
Solution Approach 1:
The patent applies preliminary action by having the wireless device proactively generate and transmit unavailability information frames before interference occurs. The device predicts potential interference periods from in-device coexisting radios and notifies the access point in advance, allowing the access point to adjust transmission schedules and avoid data packet drops during interference periods
Solution Approach 2:
The patent implements feedback by establishing a continuous information exchange mechanism where the wireless device reports its availability status and interference conditions to the access point. The unavailability information frames provide real-time feedback about interference periods, enabling the access point to adapt its transmission strategy dynamically based on the device's current state
2Reliability
If traditional interference mitigation methods are used, then interference impact is reduced, but data packet drops still occur and rate adaptation is suboptimal
Solution Approach 1:
The patent uses feedback by implementing a detailed unavailability information reporting mechanism that provides the access point with precise knowledge of interference periods. This feedback enables the access point to make informed rate adaptation decisions and adjust transmission parameters dynamically, improving both reliability and throughput compared to traditional methods
Solution Approach 2:
The patent applies dynamics by enabling adaptive rate adjustment and dynamic transmission scheduling based on real-time availability information. The access point can dynamically change transmission rates, adjust timing, and modify resource allocation in response to changing interference conditions, rather than using static interference mitigation parameters
3Productivity
If unavailability information is not transmitted, then frame structure remains simple, but wireless device availability and throughput optimization are compromised
Solution Approach 1:
The patent applies universality by designing the unavailability information frame to serve multiple functions simultaneously. The frame not only conveys availability status but also enables rate adaptation, transmission scheduling, and interference coordination. This multi-functionality justifies the additional frame structure complexity by delivering comprehensive throughput optimization benefits
Data Source
AI summary
Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to generate a frame that includes one or multiple types of feedbacks indicating unavailability of the wireless device and a wireless transceiver configured to wirelessly transmit the frame.