Link layer control method capable of detecting conflicts

A control method and link layer technology, applied in electrical components, wireless communication, wireless network protocols, etc., can solve the problem of high cost and achieve the effect of avoiding transmission conflicts

Active Publication Date: 2014-03-26
WUXI TSINGHUA NAT LAB FOR INFORMATIONSCI & TECH INTERNET OF THINGS TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for efficient communication between different devices over networks without any problems caused when transmitting data from one device to another through specific windows or channels that are reserved based on factors like distance travelled (the speed at which they move) or priority levels.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving battery life efficiency during wireless sensors' deployment without compromising their effectiveness or impact upon surrounding electronic devices due to excessive energy usage caused by repeated turning them ON/OFF frequently.

Method used

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  • Link layer control method capable of detecting conflicts
  • Link layer control method capable of detecting conflicts
  • Link layer control method capable of detecting conflicts

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0037]The core principle of the present invention is: after the receiver wakes up and sends a notification message (S-probe), using the idea of ​​time diversity, all senders and receivers temporarily synchronize time and divide the next period of time is a number of time slices of equal length. The sender gives the receiver a reply (acknowledgment frame ACK) in different time slots. According to the number of received ACKs and the sequence number of the time slice, the receiver can immediately know the number of senders and distinguish them by the sequence number of the time slice.

[0038] (1) Overall description of the protocol

[0039] In order to better understand the working mode of the sensor node in the transmission mode initiated by the receiver, we next describe the typical workflow of the sensor node and give a new protocol (CD-MAC link layer control p

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PUM

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Abstract

The invention provides a link layer control method capable of detecting conflicts. The method comprises the following steps: broadcasting a notification message to a transmission node by using a receiving node, and starting an RSVP (Resource Reservation Protocol) window including a plurality of time slices, wherein the notification message comprises two parameters, namely, n and m; if data packets to be forwarded exists in the transmission node, calculating a time slice sequence number according to the attached parameters n and m after receiving the notification message, and selecting corresponding time slices from the RSVP window; replying an acknowledgement frame to the receiving node; after the RSVP window ends, speculating the time slice sequence number of the received acknowledgement frame according to the receiving time of each acknowledgement frame by using the receiving node; broadcasting a poll frame to the transmission node by using the receiving node, and embedding the speculated time slice sequence number of the acknowledgement frame in the poll frame; transmitting the data packets in sequence in a polling way by using the transmission node. By adopting the link layer control method, transmission conflicts can be avoided effectively.

Description

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Claims

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Application Information

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Owner WUXI TSINGHUA NAT LAB FOR INFORMATIONSCI & TECH INTERNET OF THINGS TECH CENT
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