Transmitting data in a power line network using link quality assessment

a technology of link quality assessment and power line network, applied in powerline communications applications, frequency-division multiplexes, instruments, etc., can solve problems such as significant drawbacks in methods and the inability to provide the best signal throughput of the shortest path between two nodes

Inactive Publication Date: 2005-05-10
ENIKIA
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  • Summary
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AI Technical Summary

Problems solved by technology

However, this method suffers from a significant drawback.
Specifically, since the character of the powerlines in a network are constantly changing as a result of noise and other sources of signal degradation, the shortest path between two nodes does not always provide the best signal throughput.

Method used

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Embodiment Construction

[0007]The present invention uses a link quality assessment algorithm (LQAA) to determine the most viable communications path between two nodes of a powerline network. In such a network, a given node may not be able to communicate with all the other nodes due to changing characteristics in the powerline environment. The present invention ensures a reliable communication path by rotating communications through more reliable links on the network.

[0008]Historical communication data regarding Effective Link Throughput (ELT) is gathered and stored at each node of the network in the form of an ELT table. Periodically, each node enters the network which is fabricated as a token ring and broadcasts a normalized throughput value of between 0 and 1 for every other visible node on the network. All the other nodes on the network listen to the broadcast messages and compare the broadcast values for each node to the values that the listening nodes have stored in their respective ELT tables. This a...

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Abstract

A method for selecting a communication path between two nodes of a powerline network using a link quality assessment algorithm which selects a communication path based on an analysis of historical data regarding the effective throughput of data transmitted between different nodes of the network. The algorithm is also used to select an appropriate gear for such communication based on an analysis of historical data regarding the unit error rates of data transmitted between the two nodes.

Description

PRIORITY NOTICE[0001]This U.S. patent application is a Continuation-In-Part of U.S. patent application Ser. No. 09 / 290,353 filed on Apr. 12, 1999 abandoned which claims the benefit of the Dec. 23, 1998 filing date of Provisional U.S. patent application Ser. No. 60 / 113,608, filed Dec. 23, 1998. This application is related to U.S. patent applications entitled Method for Transmitting a Signal on a Network and Method for Changing Signal Modulation Based on Analysis of Powerline Conditions which were both filed on Jun. 28, 2000.FIELD OF THE INVENTION[0002]The present invention pertains to powerline networks, and more particularly to a method for selecting a reliable communication path between two network nodes based on an analysis of node-to-node historical conditions and throughput values.BACKGROUND OF THE INVENTION[0003]Conventional networks typically use the open shortest path first (OSPF) method for selecting a communication path between two nodes. This method assumes that the shorte...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04L27/26H04B3/54H04L12/28
CPCH04B3/54H04L27/2602H04L12/28H04B2203/5408H04B2203/5416H04B2203/5445H04B2203/5491H04B2203/5425H04L27/26025
Inventor MANIS, CONSTANTINE N.WALVIS, DICKBAUTISTA, MIKESZILAGYI, TOM
Owner ENIKIA
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