NSTR Channel State Feedback via Idle Link Detection
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Solution Overview
Problem
In the NSTR operation mode, existing protocols face challenges in efficiently managing channel state feedback across multiple links, leading to inefficiencies in data transmission and increased latency due to the need for all links to synchronize their transmission and reception times.
Innovation Solution
A method for channel state feedback is introduced, where a communication device determines whether a channel of a second link is idle while the first link is transmitting data, and sends a feedback frame indicating the idle status of the second link, allowing for timely data transmission across all links in the NSTR link pair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If all links synchronize their transmission and reception times in NSTR mode, then radio frequency interferences between links are reduced, but data transmission efficiency decreases and latency increases
Solution Approach 1:
The patent applies preliminary action by having the first communication device determine the idle status of the second link's channel before the NSTR transmission begins. This advance determination allows the system to prepare coordination information in advance, enabling timely data transmission across all links without waiting for complete synchronization, thus reducing latency while maintaining interference protection.
Solution Approach 2:
The patent implements feedback by having the first communication device transmit a feedback frame to the second communication device, indicating whether the second link's channel is idle. This feedback mechanism enables the second device to make informed transmission decisions, allowing asynchronous transmission attempts that reduce both interference and latency by coordinating transmissions dynamically rather than requiring strict synchronization.
2Reliability
If all links wait for backoff counters to reach zero before transmitting, then channel access is coordinated, but transmission time is delayed
Solution Approach 1:
The patent applies preliminary action by determining the idle status of the second link's channel in advance, before the NSTR transmission window begins. This advance determination allows the system to prepare and coordinate transmission timing proactively, reducing the waiting time associated with traditional backoff mechanisms while maintaining reliable channel access coordination through the feedback frame mechanism.
Data Source
AI summary
This disclosure provides a method for channel state feedback in a non-simultaneous transmit and receive (NSTR) operation mode and the communication device thereof. The method implemented in a first communication device, the first communication device being configured with a plurality of links for communicating with a second communication device, the method including: receiving first data over a channel of a first link of the plurality of links; determining whether a channel of a second link of the plurality of links is idle in a case that no data is received over the channel of the second link and the first link and the second link belong to a non-simultaneous transmit and receive (NSTR) link pair; and transmitting a feedback frame over the channel of the first link, wherein the feedback frame includes a first field indicating whether the channel of the second link is idle.