Wi-Fi Continuous Retransmission Interval Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems like IEEE 802.11 (Wi-Fi), packet retransmissions are often performed with similar priority as new transmissions, leading to interleaving of other transmissions between initial and retransmissions, which can result in decreased throughput and increased buffer corruption risks.
Innovation Solution
Implementing packet retransmissions at a different interval than initial transmissions, providing a higher priority level to retransmissions, allowing continuous transmission without interleaving with other data packets, and enabling receivers to use receive/chase combining with reduced buffer corruption risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packet retransmissions are performed with similar priority as new packet transmissions, then new packets can be transmitted efficiently, but retransmissions may be interleaved with other transmissions causing decreased throughput and buffer corruption
Solution Approach 1:
The patent changes the transmission interval parameter for retransmissions, using a shorter interval (e.g., 9 microseconds) compared to the standard interframe space (e.g., 34 microseconds) for new transmissions. This parameter change ensures retransmissions occur continuously without interleaving, resolving the contradiction by maintaining high throughput while eliminating buffer corruption risks.
Solution Approach 2:
The patent implements continuous retransmission of the same packet until successful delivery, preventing other packets from being interleaved in between. This continuity ensures that retransmissions complete without interruption, maintaining system throughput while preventing buffer corruption that would occur with intermittent transmissions.
2Productivity
If retransmissions are performed at a shorter interval than new transmissions, then retransmissions get higher priority and continuous transmission is achieved, but the transmission protocol complexity increases
Solution Approach 1:
The patent applies different transmission intervals for different packet types: a shorter interval for retransmissions and a standard interval for new transmissions. This local differentiation ensures retransmission efficiency without requiring the entire protocol to become more complex, as each packet type follows its own transmission rules.
Solution Approach 2:
The transmission interval dynamically changes based on whether the packet is a retransmission or a new transmission. The system automatically adjusts the interval parameter according to the packet type, achieving high retransmission efficiency without manual intervention or complex protocol management.
Data Source
AI summary
This disclosure relates to performing retransmissions in a wireless communication system by a wireless device. A wireless device may receive a first transmission of a data frame according to a wireless communication technology. The wireless device may attempt to decode the data frame. It may be determined that attempting to decode the data frame is unsuccessful. A retransmission of the data frame may be received at a retransmission interval after the first transmission of the data frame. The retransmission interval may be less than a minimum interframe interval for contending for medium access for new transmissions according to the wireless communication technology.