Wireless Polling Response Timing for Network Throughput
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Solution Overview
Problem
Current wireless communication methods, such as the IEEE 802.11 PCF, face inefficiencies in polling procedures due to the need for stations to wait for complete packet decoding before responding, which can lead to delays and reduced network throughput.
Innovation Solution
The method involves sending a response packet by a second device in a wireless network before or during the completion of decoding the poll packet, utilizing separate uplink and downlink channels for full duplex operation, and modifying the poll packet structure to include a high reliability MAC header and preamble for robust transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a station waits for complete poll packet decoding before sending response, then decoding accuracy is ensured, but communication delay increases and network throughput decreases
Solution Approach 1:
The station performs preliminary decoding of the address field in the poll packet as soon as it is received, before the complete packet is decoded. This preliminary action allows the station to identify that it is being polled and prepare its response in advance, reducing the overall communication delay while maintaining accurate address identification
Solution Approach 2:
The poll packet decoding process is segmented into priority levels, with the address field being decoded first and treated as more critical than other fields. This segmentation allows the station to focus decoding resources on the most important information (address) first, enabling early response preparation without waiting for complete packet decoding
2Reliability
If stations respond only after complete poll packet decoding, then response accuracy is improved, but network throughput deteriorates
Solution Approach 1:
The station performs preliminary decoding of the address field and prepares the response in advance before the complete poll packet is decoded. This preliminary action enables the station to have its response ready earlier, allowing faster response transmission while ensuring the address identification is accurate, thus improving network throughput without sacrificing response accuracy
Solution Approach 2:
The decoding and response preparation processes are made continuous rather than sequential. While the station continues decoding the remaining fields of the poll packet, it has already prepared its response based on the address field. This continuity eliminates idle waiting time and keeps the communication channel actively utilized, improving network throughput
3Loss of information
If stations decode the entire poll packet before responding, then complete information processing is achieved, but power consumption increases
Solution Approach 1:
The station extracts only the essential address information from the poll packet that is needed to determine whether it should respond. By taking out only this critical information for processing, the station avoids the energy cost of completely decoding the entire packet when it may not be addressed, thus reducing power consumption while maintaining the ability to respond accurately when necessary
Data Source
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AI summary
A wireless communication method includes sending, by a first device in a wireless network, a poll packet (32, 38, 44) for polling a second device in the wireless network. The poll packet includes an address of the second device. The second device receives and at least partially decodes the poll packet. The second device sends a response packet (36, 40, 46) in response to the poll packet. The sending of at least part of the response packet is substantially simultaneous with the receiving of at least part of the poll packet by the second device. Wireless communication systems, transmitters and receivers using the method are also described.