Research On Network Organizing Algorithm In Low-voltage Power Line Communication Network

Power line carrier communication (PLC) is a new way which the modulated electricalsignals in the grid carry data over the power line media. PLC has the characteristics such asfast building, low investment and zero indoor wiring, which has huge advantages comparingto any other access technology. With the market of power line carrier communicationexpanding, especially for the application of automatic meter reading in electricity informationacquisition system, it puts forward higher requirements for the validity and reliability of thepower line communication network. Therefore it is very meaningful to do research onnetwork organizing algorithm.According to field survey, there are many complex electromagnetic compatibilityproblems in power line carrier communication system, mainly including harmful conductedinterference coupled by capacitance, inductance and resistance. The negative impact results ingreat reduction of the system reliability.Aiming at the logical topology error caused by power line conducted interference, thisarticle analyses the traditional network organizing algorithm based on slave decision-making,introduces the networking strategy based on sink decision-making, summarizes three modelsof circuitous path in logical topology, puts forward the circuitous routes removing algorithm.By comparison of simulation results, circuitous routes removing algorithm gets rid of logicaltopology error effectively. Logical topology after network building is more accurate, beinghigh reliability, and the average hop count from sink node to any node is less so the validitygets improved. The test network platform based on embedded high-performance modem chipis designed and realized, the experiment of the validity and reliability of the system using thecircuitous routes removing algorithm is executed. The average end-to-end delay and low bit error rate is very low so that it can meet the requirements of the demand for some services.