Wireless Communication Device Dynamic Carrier Sense Level Adjustment
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Solution Overview
Problem
In wireless communication systems, the inequality of transmission opportunities arises when a wireless terminal using dynamic sensitivity control (DSC) has a higher chance of acquiring transmission rights compared to those without DSC, leading to unfair access to radio resources and potential interference.
Innovation Solution
A wireless communication device and method that dynamically set a carrier sense level and transmission parameters based on a comparison between a default and a dynamically changed carrier sense level, ensuring fair access by adjusting the transmission opportunities of both DSC and non-DSC terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wireless terminal changes the carrier sense level to increase transmission opportunities, then the transmission efficiency of that terminal is improved, but inequality of transmission opportunities occurs between terminals with and without DSC capability
Solution Approach 1:
The patent changes the carrier sense level parameter dynamically based on whether DSC is used. When DSC is enabled, the carrier sense level is adjusted to a higher threshold, allowing the terminal to transmit even when other terminals are transmitting. This parameter change resolves the contradiction by improving transmission efficiency for DSC terminals while maintaining fairness through standardized parameter adjustment rules defined in the protocol.
Solution Approach 2:
The patent introduces dynamic adjustment of the carrier sense level based on the DSC usage state. The system transitions from a static carrier sense level to a dynamic one that adapts according to whether DSC is enabled. This dynamic mechanism allows the system to optimize transmission opportunities while maintaining fairness through protocol-defined adjustment rules.
2Reliability
If a wireless terminal uses a lower carrier sense level to avoid collision, then data collision is reduced, but transmission opportunities are excessively suppressed
Solution Approach 1:
The patent adjusts the carrier sense level parameter based on DSC usage. When DSC is enabled, the carrier sense level is raised to allow more aggressive transmission. This parameter change resolves the contradiction by allowing terminals to transmit more frequently while relying on DSC mechanisms to manage collisions, thus improving transmission opportunities without sacrificing reliability.
3Productivity
If DSC terminals transmit more frequently to utilize radio resources better, then system throughput is improved, but non-DSC terminals experience reduced transmission opportunities
Solution Approach 1:
The patent standardizes the carrier sense level adjustment when DSC is used, defining specific threshold values and adjustment rules in the protocol. This ensures that while DSC terminals can transmit more frequently to improve system throughput, the adjustment is controlled and predictable, preventing complete monopolization of radio resources and maintaining a baseline level of access fairness for all terminals.
Data Source
AI summary
[Object] To provide a wireless communication device and a wireless communication method capable of reducing an inequality of transmission opportunities occurring when a carrier sense level is changed.[Solution] A wireless communication device includes: a wireless communication unit configured to perform wireless communication with another device; and a control unit configured to set a first carrier sense level and control a parameter used by the wireless communication unit to transmit data based on a comparison result between the set first carrier sense level and a second carrier sense level which is a default.