Adjustable Multi-Link Clear Channel Assessment Under Self-Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges with unreliable transmissions, significant channel access delay, and reduced medium utilization efficiency due to interference and constraints in multi-link operations, particularly in environments with multiple wireless stations sharing a shared communication spectrum.
Innovation Solution
Implementing an adjustable multi-link clear channel assessment (ML-CCA) mechanism that adjusts channel availability assessments based on the transmission states of multiple wireless links to reduce access latency, improve transmission reliability, and increase throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link operations are performed in wireless communication systems, then transmission throughput can be increased, but transmission reliability deteriorates due to self-interference and channel constraints
Solution Approach 1:
The patent implements dynamic Clear Channel Assessment (CCA) mechanisms that adaptively adjust channel detection parameters based on the transmission states of multiple wireless links. The system dynamically modifies CCA behavior when self-interference is detected, enabling reliable channel access decisions despite the presence of multiple active links, thus maintaining transmission reliability while enabling multi-link operations for increased throughput
Solution Approach 2:
The patent employs feedback mechanisms where the wireless device continuously monitors the transmission states of its multiple links and uses this information to adjust CCA procedures. When a link is in transmission state, the device provides feedback to modify the CCA behavior on other links, creating a closed-loop system that maintains reliability while maximizing throughput through coordinated multi-link operation
2Ease of operation
If channel availability assessment is performed on each wireless link independently, then channel access can be simplified, but access delay increases due to redundant assessments and lack of coordination
Solution Approach 1:
The patent merges the CCA procedures across multiple wireless links by allowing the transmission state of one link to influence the CCA behavior of other links. Instead of performing completely independent assessments, the system combines information from multiple links to make coordinated channel access decisions, reducing redundant assessments and decreasing access delay while maintaining operational simplicity
Solution Approach 2:
The patent implements preliminary CCA actions where the system proactively assesses channel conditions on multiple links before actual transmission is needed. By performing channel availability assessments in advance and coordinating them across links, the system prepares for future transmissions more efficiently, reducing the delay when actual channel access is required
3Productivity
If multiple wireless stations share the same frequency channel, then medium utilization efficiency can be improved, but transmission reliability deteriorates due to interference
Solution Approach 1:
The patent segments the channel access control by implementing link-specific CCA procedures that can be independently adjusted based on transmission states. Each wireless link maintains its own CCA counter and assessment procedure, allowing the system to manage multiple sharing stations without mutual interference, thus maintaining reliability while improving overall medium utilization efficiency through coordinated sharing
Data Source
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AI summary
The present document discloses methods, systems, and devices related to digital wireless communications, and more specifically, to techniques related to adjustable clear channel assessment for simultaneous transmission and reception constraint multi-link device. The method of the adjustable multi-link clear channel assessment includes adjustment of signal strength measurement algorithm or adjustment of energy detection threshold for the assessment when the multi-link network allocation vector is set for the transmission. A method for wireless communication includes identifying, by a wireless device, that a first wireless link and a second wireless link of the wireless device are in a detecting state at a first time. The method also includes modifying, by the wireless device, a multi-link channel availability assessment procedure of a second wireless link based on detecting a transmission state of the first wireless link at the first time.