Bandspread communication network system in low-voltage distribution network and its communication method

A low-voltage distribution network and spread-spectrum communication technology, which is applied in the distribution line transmission system and other directions, can solve problems such as inability to guarantee communication reliability

Inactive Publication Date: 2003-01-01
TSINGHUA UNIV
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Problems solved by technology

[0011] When using the spread spectrum communication method to carry out network communication on the low-voltage distribution network, due to the complexity of the channel of the low-voltage distribution network, the direct communication distance between any two points on the network is generally less than 500 meters. In special cases, even if the distance is relatively short, due to For reasons such as the bifurcation of the distribution network, the reliability of communication cannot be guaranteed; thus, it is necessary to plan the distribution network and place routers at key nodes

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  • Bandspread communication network system in low-voltage distribution network and its communication method
  • Bandspread communication network system in low-voltage distribution network and its communication method
  • Bandspread communication network system in low-voltage distribution network and its communication method

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[0033] please see figure 1 . 1 is a computer, using Lenovo Kaitian P41.5G, with an ATEN photoelectric isolation 232-485 converter; 2 is a 485 communication line; 3 is a carrier communication concentrator, 4 is a router, and 5 is a user terminal.

[0034] figure 2 It is a typical network distribution, that is, a schematic diagram of network segment division. 61~64 represent the network segment. This unified management of network node address allocation simplifies the "prior knowledge" required by routers for network node allocation. If the arrangement of addresses in the network is messy, the concentrator 3 needs to send a data packet to the address 64.18 , the concentrator 3 (the router of the 61 network segment) needs to know the specific path to reach 64.18, which will be unrealistic when there are many network nodes. Now after the unification, the concentrator 3 can deliver to the network segment 64 via the network segment 63, and then directly send to 64.18 by the rou...

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Abstract

The present invention belongs to the field of low-voltage power line communication technology. The bandspread communication network system features the pyramid-shaped master-slave communication system structure comprising computer, concentrator, router and subscribers from top to down. The communication method features the establishment of relation table of network node low-place address and phase on the basis of proposing network node and network segment; the establishment of the bi-directional communication relationship including concentrator, network segment router, network node low-place address and phase; and the establishment of the subscriber ID-network node address table for unique correspondence of subscriber ID and destination address.

Description

technical field [0001] A low-voltage distribution network spread-spectrum communication network system and a communication method thereof belong to the technical field of low-voltage power line communication. Background technique [0002] The use of power lines as the signal transmission medium to realize communication is a technology that research and industrial departments such as electric power, communication, and network in various countries have been devoting to research and development. Power line communication is usually divided according to the voltage level of the power network, which can be divided into high voltage power line communication (above 100KV), medium voltage power line communication (1KV~100KV) and low voltage power line communication (below 1kV, 380V / 220V). As far as the characteristics of the power line communication channel are concerned, the high-voltage power line communication environment is the best, followed by the medium-voltage power line envi...

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Application Information

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IPC IPC(8): H04B3/54
Inventor 郭静波王赞基吕海峰李刚赵宇明王乔辰
Owner TSINGHUA UNIV
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