Wireless Device Transmission Power Control via Dynamic CCA Threshold
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Solution Overview
Problem
Current wireless communication systems using CSMA/CA face performance limitations due to overly conservative Clear Channel Assessment (CCA) thresholds, especially when dynamic sensitivity control (DSC) is employed, leading to unnecessary reduction in transmission power for high-priority transmissions, which can result in incorrect reception and decoding by APs.
Innovation Solution
The system determines whether to apply transmission power control (TPC) commands based on the type of traffic and dynamically adjusts the CCA threshold, allowing high-priority transmissions to proceed without TPC commands when unnecessary, thereby optimizing transmission power and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power control commands are applied to dynamically adjust transmission power, then interference with neighboring transmissions is reduced, but system performance deteriorates due to unnecessary power reductions for high-priority transmissions
Solution Approach 1:
The patent changes the parameter of transmission power control application by introducing a traffic type parameter. The system dynamically adjusts whether to apply TPC commands based on the traffic type, allowing high-priority transmissions to bypass power reduction while maintaining power control for other traffic types. This resolves the contradiction by making the power control application conditional rather than universal.
Solution Approach 2:
The patent introduces dynamic decision-making based on traffic type classification. The system dynamically determines whether to apply TPC commands in real-time based on the priority level of the transmission, rather than using a static approach. This dynamic adaptation allows the system to optimize both interference reduction and performance maintenance simultaneously.
2Reliability
If CCA threshold is set conservatively low, then channel access reliability is improved, but transmission performance deteriorates due to limited system throughput
Solution Approach 1:
The patent changes the CCA threshold parameter dynamically based on traffic type. For high-priority transmissions, the system uses a higher (less conservative) CCA threshold to improve throughput, while for other traffic types, it maintains a lower threshold for reliability. This parameter adaptation resolves the contradiction between reliability and throughput.
Solution Approach 2:
The patent applies different CCA threshold values for different traffic types, creating local optimization rather than a uniform approach. High-priority traffic receives favorable threshold settings while other traffic maintains conservative settings, allowing each traffic type to operate under optimal conditions for its specific requirements.
3Productivity
If DSC techniques are employed to adjust CCA threshold, then channel access efficiency is improved, but interference to neighboring transmissions increases
Solution Approach 1:
The patent modifies the DSC operation by introducing traffic-type-dependent CCA threshold adjustment. Instead of uniformly adjusting CCA thresholds for all transmissions, the system selectively applies DSC based on traffic priority, reducing interference generation while maintaining channel access efficiency for appropriate traffic types.
Solution Approach 2:
The patent introduces dynamic control over DSC application based on real-time traffic type assessment. The system dynamically enables or disables DSC effects for each transmission based on its priority level, creating a adaptive mechanism that balances channel access efficiency with interference reduction.
Data Source
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AI summary
Methods and devices for configuring a transmission power of a transmission by a wireless communication device (102) are provided. For instance, an example method (200) is described that includes determining (202) whether the wireless communication device (102) is to control the transmission power (114) of the transmission (104) in accordance with transmission power control commands (108) from a radio network node (106). In an aspect, the determination is based on whether the wireless communication device (102) is configured to dynamically adjust a clear channel assessment (CCA) threshold for the transmission (104) and based on a traffic type (112) conveyed by the transmission (104). The example method may also include transmitting (204) the transmission (104) with a transmission power (114) that is configured based on such a determination.