Wireless Packet Transmission Method for Real-Time Traffic
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Solution Overview
Problem
Existing wireless network technologies face challenges in providing efficient real-time communication services due to high power consumption and suboptimal bandwidth usage, particularly in wireless handheld devices, as they are designed to transmit data packets rather than optimize real-time packet transmission, leading to inefficiencies in power-saving mechanisms that often compromise network performance.
Innovation Solution
A packet transmitting method that utilizes a multicast mechanism compatible with Standard 802.11, dynamically determining whether real-time packets require re-transmission based on network status, integrating multiple real-time packets into a single downlink packet, and converting unicast to multicast MAC addresses to reduce re-transmission overhead and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the network card is kept on permanently to transmit and receive packets, then real-time communication service is available, but power consumption increases
Solution Approach 1:
The patent implements periodic wake-up cycles where the wireless network device alternates between sleep mode and active state. The device wakes up at predetermined intervals to check for buffered packets, transmit uplink packets, and receive downlink packets, then returns to sleep mode. This periodic operation enables real-time communication while significantly reducing power consumption compared to continuous operation.
2Use of energy by moving object
If the wireless network is kept in sleeping mode to reduce power consumption, then power saving is achieved, but packet transmission efficiency decreases
Solution Approach 1:
The patent employs preliminary actions by buffering packets at the access point before the wireless network device wakes up. The access point stores incoming downlink packets in a buffer during the device's sleep period, and the device retrieves these buffered packets immediately upon waking. This preliminary buffering eliminates transmission delays and maintains high packet transmission efficiency despite the device being in sleep mode most of the time.
3Reliability
If re-transmission mechanism is enabled to ensure reliable transmission, then transmission reliability improves, but bandwidth usage increases
Solution Approach 1:
The patent implements a dynamic re-transmission mechanism where the re-transmission function is selectively enabled or disabled based on packet type. For real-time packets (voice, video), re-transmission is disabled to conserve bandwidth, accepting some packet loss as tolerable. For non-real-time data packets, re-transmission remains enabled to ensure reliable delivery. This dynamic adaptation optimizes bandwidth usage while maintaining appropriate reliability for different application requirements.
4Reliability
If multiple control packets (RTS, CTS, ACK) are transmitted to ensure reliable communication, then transmission reliability improves, but network overhead increases
Solution Approach 1:
The patent extracts and removes unnecessary control packets from the transmission protocol for real-time traffic. Specifically, the RTS (Request to Send) and CTS (Clear to Send) handshake packets are eliminated for real-time packet transmission, allowing direct data transmission without the full CSMA/CA reservation sequence. This extraction of redundant control elements significantly reduces network overhead while maintaining acceptable reliability for real-time applications where some packet loss is tolerable.
Data Source
AI summary
A packet transmitting method of wireless network is provided. The packet transmitting method determines whether the packet to be transmitted is a real-time packet or not, and, when the packet is a real-time packet, a re-transmission mechanism of the packet is determined to be ON or OFF according to the transmission status of the wireless network itself.