RTS/CTS Transmission Control for Shared-Channel Collision Avoidance
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Solution Overview
Problem
In wireless communication systems, handshake signals such as RTS and CTS messages can collide with other transmission signals in shared spectrum channels, leading to interference and inefficient communication processes, particularly due to hidden node issues and unnecessary signal detections, which increase power consumption.
Innovation Solution
A transmission control method and apparatus that cancels or skips configured transmissions when preset conditions are met, such as collision of RTS/CTS messages with other resources, and reduces unnecessary detections to expedite handshake processes and minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a handshake mechanism (RTS/CTS messages) is used for channel access in shared spectrum, then communication reliability is improved, but signal collision with other transmission signals occurs, affecting communication efficiency
Solution Approach 1:
The patent extracts the problematic RTS/CTS handshake signals from the transmission timeline by canceling configured transmissions when resource collision is detected. This removes the conflicting signals while preserving the beneficial collision detection mechanism, allowing the system to maintain reliability through LBT while avoiding efficiency losses from handshake collisions.
Solution Approach 2:
The patent implements dynamic transmission control where the terminal adjusts its behavior based on real-time detection of RTS/CTS messages. When collision is detected, the terminal dynamically cancels configured transmissions; when no collision occurs, normal transmission proceeds. This dynamic adaptation resolves the contradiction by making the system responsive to actual channel conditions.
2Productivity
If terminal performs detection within channel occupancy time indicated by RTS message, then communication process is completed, but power consumption increases due to unnecessary signal detections
Solution Approach 1:
The patent applies partial action by having the terminal skip unnecessary detections within the channel occupancy time when RTS messages are detected. Instead of performing full detection procedures, the terminal makes a streamlined decision to cancel transmission, reducing power consumption while maintaining communication process completion through the cancellation mechanism.
Data Source
AI summary
A transmission control method, a transmission control apparatus, and a communication device are provided. A transmission control method, performed by a communication device, includes: canceling, in a case that a Request-To-Send (RTS) message or a Clear-To-Send (CTS) message meets a preset condition, configured transmission.