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Power-line communication method, power-line communication device, and power-line communication system

A power line communication, power line technology, applied in power line communication applications, distribution line transmission systems, transmitting/receiving signals by adding signals to waves, etc., can solve problems such as degraded throughput, achieve elimination of periodic noise, Effect of eliminating influence, high communication efficiency

Active Publication Date: 2013-11-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

like Figure 26 As shown in (b), when widening the range including large noise levels and emitting Figure 26 With the packets DPx, DPy, and DPz shown in (a), noise with a higher level than the assumed level is applied to the packet DPz, thereby greatly degrading the throughput

Method used

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  • Power-line communication method, power-line communication device, and power-line communication system
  • Power-line communication method, power-line communication device, and power-line communication system
  • Power-line communication method, power-line communication device, and power-line communication system

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no. 1 example

[0084] figure 1 is a diagram schematically illustrating the configuration of the power line communication system according to the first embodiment of the present invention. figure 1 The power line communication system shown in includes a plurality of PLC (Power Line Communication) modems 100M, 100T1 , 100T2 , 100T3 , . . . , 100TN connected to a power line 900 . exist figure 1 Five PLC modems are shown in , but the number of connected modems is arbitrary. The PLC modem 100M serves as a master terminal, and is used to manage the connection status (link status) of the PLC modems 100T1, . . . , 100TN serving as slave terminals. However, the PLC modem used as the master terminal is not necessary.

[0085] In the following description, master terminals and specific slave terminals are described as PLC modems 100M, 100T1, 100T2, 100T3, . . . , 100TN, and general slave terminals are described as PLC modems 100T. The PLC modem is not limited to the master terminal, and the slav...

no. 2 example

[0147] In the power line communication system according to the first embodiment described above, the noise condition in the communication medium has been detected regardless of the communication time slot. In contrast, in the power line communication system according to the second embodiment of the present invention, noise conditions are detected in units of time slots synchronized with the cycle of the AC power supply. The power line communication system according to the second embodiment differs from the power line communication system according to the first embodiment only in this point, and thus descriptions of other configurations are omitted.

[0148] Figure 20 The configuration of a time slot in the power line communication system according to the second embodiment of the present invention is shown. Figure 20 (a) shows packet transmission timing synchronized with AC power source 1, where Figure 20 (a1) shows grouping, and Figure 20 (a2) shows a slot column. exis...

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Abstract

Provided is a power-line communication method, a power-line communication device, and a power-line communication system, which can make communication with high communication efficiency even when the condition of a power line is changed. In step S101, a noise detection process is performed in correspondence to a time domain synchronized with a power source cycle of a power line. In step S102, a communication channel decision process of generating communication channels in the time domain is performed on the basis of the noise condition detected in step S101. In step S103, tone maps are preparedfor the communication channels generated in step S102. When the preparation of the tone maps is ended, the tone maps are transmitted to a destination PLC and data are transmitted and received betweena transmission-side PLC and a reception-side PLC by the use of the same tone map (step S104).

Description

technical field [0001] The present invention relates to a power line communication method, a power line communication device and a power line communication system for performing multi-carrier communication using a power line as a communication medium. Background technique [0002] It is well known that there is noise in power lines that is synchronous with the AC power cycle. Accordingly, when communication is performed using a power line as a communication medium, it is possible to perform efficient communication by transmitting and receiving packets in synchronization with the cycle of the AC power supply. Figure 25 An example of a tone map assignment procedure in conventional power line communication is shown. Figure 25 (a) shows a packet train synchronized with the cycle of the AC power supply 1, in which data packets DP and acknowledgment packets AK are alternately transmitted. Figure 25 (b) shows the noise level of the power line as a communication medium, where the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/54
CPCH04B3/54H04B2203/5416H04B2203/5454H04L1/0026H04L1/1671H04L1/24H04L5/0046H04L5/006H04L25/0202H04L25/03878H04L27/2626H04L5/0007H04L1/0057H04L1/203H04L5/0094
Inventor 古贺久雄儿玉宣贵
Owner PANASONIC CORP