Method and system of combining signals in bpl communications

a technology of combining signals and bpl communication, applied in the field of bpl communications, can solve problems such as the potential injury or death of people on mv power lines

Inactive Publication Date: 2008-06-19
SHI SAM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008]The system and method according to the invention allows for a BPL MV communications system on power utility grid that eliminates the need for two MV couplers per BPL modem (one for each of two communication directions) w

Problems solved by technology

Such MV power lines have the pote

Method used

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  • Method and system of combining signals in bpl communications
  • Method and system of combining signals in bpl communications
  • Method and system of combining signals in bpl communications

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Embodiment Construction

[0024]As shown in FIG. 2, a BPL access system according to the invention, generally designated as 10, communicating over MV power line 100 and using FDD to combine BPL Signal 1 and BPL Signal 2 into BPL Signal 1+2, requires only one MV coupler 200, which provides for both upstream and downstream traffic along MV power line 100. BPL modem 210 therefore requires only a single input / output port 220, in the case where RF combiner is internal to BPL modem 210.

[0025]FIG. 3 shows how BPL signal 1 and BPL signal 2 (one intended for upstream communications, the other for downstream) are combined into one signal, BPL Signal 1+2. As BPL signal 1 and BPL signal 2 are in different frequency bands according to FDD, they can be combined with minimal interference. RF combiner 300 is used to combine BPL signal 1 and BPL signal 2. RF combiner 300 can be an off the shelf component (when external to modem 210) or can be positioned within BPL modem 210.

[0026]As shown in FIG. 4, BPL modem 210 may have mu...

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Abstract

A system for communicating BPL signals is provided, including a BPL modem having a first internal modem and a second internal modem, the first internal modem and the second internal modem each in communication with a RF combiner; the RF combiner in communication with a medium voltage power line; and wherein the RF combiner combines signals from the first internal modem and the second internal modem into a single signal, and communicates the single signal to the medium voltage power line.

Description

FIELD OF THE INVENTION[0001]The invention relates to broadband over power line (“BPL”) communications, and more particularly to such communications between a BPL modem and a medium voltage (“MV”) power line.BACKGROUND OF THE INVENTION[0002]Using BPL communications on MV power lines requires repeating or regenerating signals at various intervals to maintain sufficient signal strength to reach the signal destination. Such signal regeneration may be done by BPL modems connected to the MV power line. When multiple devices try to communicate over a single physical line, the devices must follow a specified scheme to share the physical resource and to avoid interfering with each other. There are two such schemes commonly used, one referred to as Time Division Duplexing (“TDD”), and the other as Frequency Division Duplexing (“FDD”).[0003]TDD is a scheme whereby devices split up a period of time T (seconds) into N divisions, with each device being given T / N (seconds) of the total time T in w...

Claims

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Application Information

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IPC IPC(8): H04J1/02H04B1/38
CPCH04B2203/5479H04B3/58
Inventor SHI, SAMSOBOTKA, PETERDONNELLY, BRIAN
Owner SHI SAM
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