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Networking communication method for multi-slave cable anti-theft monitoring system

  • US 10,169,966 B1
  • Filed: 11/01/2017
  • Issued: 01/01/2019
  • Est. Priority Date: 06/20/2017
  • Status: Active Grant
First Claim
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1. A networking communication method for a multi-slave cable anti-theft monitoring system, wherein the cable anti-theft monitoring system using the networking communication protocol is composed of a central office, a master and slaves, and the central office receives a message of a cable status monitoring result, reported by the master, and presents the status of the system to a user through a human-machine interface;

  • the master and the slaves monitor a work status of a cable in real time based on power line carrier communication and data collection, and reports a monitoring result to the central office over a GPRS wireless network; and

    the slaves receive a cable status data query command from the master and feed a local collection result back to the master;

    as a timer is arranged at each site of the system, the central office (CO), the master (MA) and the slave Sn perform initialization respectively after the system is powered on, which is characterized in that the execution flow of a networking and communication protocol between communication sites is described as follows;

    A1;

    the master (MA) sends a site registration application message to the central office via a wireless communication module, and starts a registration feedback timer thereof;

    A2;

    after receiving the registration application message from the master (MA), the central office (CO) first determines whether the master has been registered, if the master has been registered, the central office sends a registration confirmation message to the master directly via the wireless communication module;

    if the master is not registered, the central office writes information on the master to a list of sites in a database, and then replies a registration confirmation message to the master;

    after the registration confirmation message is sent to the master, the central office starts a site failure timer for the master to be registered;

    A3;

    after receiving the registration confirmation message, the master (MA) turns off the registration feedback timer and verifies the correctness of the message, the registration is successful if the message is correct, the master will change a registration flag REG=1 thereof, then construct a piggybacking slave data request frame, and sends the data request frame via a power carrier communication module to the slave Sn furthest from the master, where the slave Sn is located on a monitored line, n is a positive integer greater than 2, and a slave response timer is turned on;

    A4;

    after receiving the piggybacking data request, the slave Sn first turns off a site failure timer thereof and verifies the correctness of the message, if the message is correct, the slave Sn will collect relevant local data information according to the data request and insert the data information in a piggybacking data request feedback frame, and send the data request feedback frame to the last slave Sn−

    1 via the power carrier communication module, after sending the data frame, the slave Sn will restart the site failure time to wait for the next data request;

    A5;

    after receiving the piggybacking data request feedback frame with response data from the slave Sn, the slave Sn−

    1 turns off a site failure timer thereof and verifies the correctness of the message, if the message is correct, the slave Sn−

    1 will also insert relevant local data information in a piggybacking data request feedback frame, and send the data request feedback frame to the last slave Sn−

    2 via the power carrier communication module, after sending the data frame, the slave Sn−

    1 will restart the site failure time;

    A6;

    similar to the slave Sn and the slave Sn−

    1, after verifying the correctness of the message, a preorder slave inserts local data information in a piggybacking data request feedback frame and sends the data request feedback frame to the last slave until the slave S1 closest to the master (MA) receives the message for processing and sends the processed message back to the master (MA) via the power carrier communication module;

    A7;

    after receiving the piggybacking data request feedback frame from the slave S1, the master (MA) turns off the slave feedback timer and verifies the correctness of the message, if the message is correct, the master constructs a data collection message according to the data request feedback frame and sends the data collection message to the central office (CO); and

    A8;

    after receiving the data collection message reported by the master (MA), the central office (CO) first turns off the corresponding site failure timer and verifies the correctness of the message, if the message is correct, the central office writes the data information to a database, after writing the data information, the central office (CO) will restart the corresponding site failure timer to wait for the next data reporting from the master (MA).

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