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A channel access control method and system for a power line communication network

A channel access control and communication network technology, applied in distribution line transmission systems, transmission systems, hybrid switch systems, etc., can solve problems such as poor communication efficiency, reduce system complexity, reduce the number of data retransmissions, The effect of reducing channel contention collisions

Active Publication Date: 2017-01-04
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0008] The present invention aims to overcome the problem of poor communication efficiency caused by frequent CSMA / CA mechanism channel competition in the LPLC network in the prior art. According to one aspect of the present invention, a method and system for channel access control of a power line communication network are proposed

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  • A channel access control method and system for a power line communication network
  • A channel access control method and system for a power line communication network
  • A channel access control method and system for a power line communication network

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Embodiment Construction

[0026] The specific embodiments of the present invention will be described in detail below in conjunction with the drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0027] In order to solve the problem of low communication efficiency and low communication quality caused by frequent channel competition of the CSMA / CA mechanism in the LPLC network in the prior art, the present invention proposes a power line communication network channel access control method.

[0028] According to an embodiment of the present invention, a channel access control method (Event Drived Access Control, hereinafter referred to as EDAC) of a power line communication network is provided, figure 1 The working flow chart of EDAC, the specific steps are as follows:

[0029] Step 101: Before sending data, each node listens to the channel, and realizes access to the channel by responding to the event instruction sent by the master ...

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Abstract

The present invention discloses a power-line communication network channel access control method and system, said method comprising: on the basis of the number of nodes transmitting data, a main station divides the data transmission time window of the nodes into a plurality of time slots; each node calculates and compares the data transmission probability in each time slot; and the node with the highest data transmission probability in a given time slot sends data to the main station during the corresponding time slot. By means of a method combining an event-driven approach and probability functions, the present power-line communication network channel access control method and system guarantees that at times of data transmission competition, only one node in the network has the highest probability of data transmission, thereby effectively inhibiting or reducing channel collision; the present method and system can also effectively decrease the occurrence of data re-transmission, thus reducing power-line communication network delay; implementation is relatively simple and the complexity of the system is reduced.

Description

Technical field [0001] The present invention relates to the field of power line communication, and in particular to a method and system for channel access control of a power line communication network. Background technique [0002] Low-Voltage Powerline Communications (LPLC) technology, as a unique communication technology in the power industry, has the huge advantages of wide coverage and low cost. It is widely used in power users' electricity information collection systems and is used in intelligent power distribution The field has huge application prospects. [0003] The CSMA / CA mechanism is still widely used in the MAC protocol of the LPLC network. In the competitive CSMA / CA protocol based on the time slot window, if there is data to be sent, the communication node first randomly selects a transmission time slot with equal probability within the transmission window; after that, the communication node keeps listening to the channel until the random The selected transmission ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/911H04B3/54
CPCH04L12/6418
Inventor 白晖峰王东山王立城胡科军
Owner STATE GRID CORP OF CHINA
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