MAC Rate Selection for Wireless Error Control
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Solution Overview
Problem
Conventional communication systems face challenges in efficiently managing data transfer rates and error rates in wireless communication networks, particularly in multimedia applications, where peak data rates may be below wire speed and real-time constraints necessitate minimizing retransmissions due to latency delays.
Innovation Solution
A system and method for medium access control (MAC) rate selection that dynamically adjusts MAC and PHY layer parameter values, such as coding rates and modulation types, to maintain error rates within specified ranges, thereby optimizing data transfer rates while reducing bit error rates, packet error rates, and frame error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted at high data transfer rates in wireless communication networks, then productivity is improved, but reliability deteriorates due to increased bit error rates, packet error rates, and frame error rates
Solution Approach 1:
The patent implements dynamic adaptation of MAC layer parameters (such as contention window sizes, retry limits, and transmission intervals) based on real-time channel conditions and error rate measurements. This allows the system to optimize data transfer rates while maintaining reliability by adjusting parameters dynamically rather than using fixed settings.
Solution Approach 2:
The system changes MAC layer parameters based on observed error rates and channel conditions. When error rates increase, the system adjusts parameters such as reducing transmission power, increasing retry limits, or modifying contention window sizes to maintain reliable communication while adapting to varying channel quality.
2Reliability
If retransmissions are performed to reduce error rates, then reliability is improved, but loss of time increases due to latency delays
Solution Approach 1:
The patent implements selective retransmission strategies where not all erroneous packets are retransmitted. Instead, the system uses forward error correction to correct certain errors without retransmission, and only retransmits packets that cannot be corrected. This partial action approach maintains reliability for critical data while reducing overall latency.
Solution Approach 2:
The system performs preliminary error detection and correction using forward error correction codes before retransmission is needed. By preemptively adding redundancy and correcting errors in advance, the system reduces the need for time-consuming retransmissions and associated latency delays.
3Productivity
If MAC layer parameters are optimized for peak data rates below wire speed, then productivity is improved, but adaptability deteriorates when transmission conditions vary
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors channel conditions, error rates, and transmission performance. Based on this feedback, MAC layer parameters are dynamically adjusted to maintain optimal peak data rates while adapting to varying transmission conditions such as channel quality, interference levels, and traffic patterns.
Solution Approach 2:
The system transitions from static MAC parameter configuration to dynamic adaptation. MAC layer parameters such as contention window sizes, retry limits, and transmission intervals are continuously adjusted based on real-time channel conditions, enabling the system to maintain high productivity across varying transmission environments.
Data Source
AI summary
Aspects of a method and system for medium access control (MAC) rate selection are presented. Aspects of the system may include at least one processor that enables selection of MAC layer parameter values and/or PHY layer parameter values, to maintain a rate of data transmission of at least one transmitted signal, which is no greater than a selected data transfer rate. The error rate of the one or more transmitted signals may be maintained within a specified range based on the selection for varying signal to noise (SNR) ratios.