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Ad hoc network system and communication device

A peer-to-peer network and sub-device technology, applied in transmission systems, network topology, wireless communication, etc., can solve the problems of increased path retrieval processing, increased terminal memory, and huge path information, and achieves rapid path repair and suppresses the effect of pressure.

Inactive Publication Date: 2014-06-25
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the point-to-point routing protocol, if the number of terminals constituting the network is large, there are problems in that the route information (routing table) for relaying is huge, the memory capacity of the terminals increases, and the processing for route search increases.

Method used

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  • Ad hoc network system and communication device
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  • Ad hoc network system and communication device

Examples

Experimental program
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Embodiment approach 1

[0042] figure 1 It is a diagram showing a configuration example of Embodiment 1 of the peer-to-peer network system according to the present invention. The peer-to-peer network system of this embodiment is composed of nodes (communication devices) 1-a to 1-j and a data collection device (GW) 2, and a plurality of nodes (nodes 1-a to 1-j, data collection device 2) autonomously form a network. like figure 1 As shown, the nodes 1 - a to 1 - j and the data collection device 2 are connected to the adjacent nodes 1 - a to 1 - j or the data collection device 2 through the wireless link 3 . In addition, in figure 1 In FIG. 10 , an example is shown in which 10 nodes of nodes 1 - a to 1 - j are provided as nodes other than the data collection device 2 , but the number of nodes other than the data collection device 2 is not limited thereto. In addition, in figure 1 In , only one wireless link (the wireless link between the node 1 - b and the node 1 - e ) is marked with a symbol as a ...

Embodiment approach 2

[0069] Figure 15 It is a diagram showing an example of transmission of a partial repair message according to Embodiment 2 in the ad hoc network system according to the present invention. The structure of the peer-to-peer network system of this embodiment, and figure 1 The structure of the peer-to-peer network system according to Embodiment 1 shown is the same.

[0070] In Embodiment 1, a method is described in which an intermediate node that detects a link error transmits a partial repair message to find a route that bypasses the link error to the destination, and sends the found route to the data collection The device 2 notifies (or implements route notification and message resending to the data collection device 2). In this embodiment, a method of finding a route that bypasses a link error for a node specified in a source route will be described.

[0071] As in Embodiment 1 Figure 5 As shown, suppose a link error 11 occurs between node 1-c and node 1-f. In addition, a...

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PUM

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Abstract

A data collection device stores, in a message, a source route which designates a path through which the message, which is transmitted to a destination node (1-h), is routed. A node which receives the message transfers the message on the basis of the source route which the received message stores. If a link error is detected between a node (1-c) and an adjacent node, the node (1-c) sets and floods a TTL to a local restore message in which the destination node (1-h) which the message does not reach due to the link error is a subject to be searched, and notifies the data collection device of a restoration path from the node (1-h) to the host device on the basis of the response to the local restore message.

Description

technical field [0001] The invention relates to an ad-hoc network system and a communication device. Background technique [0002] A large number of routing protocols (point-to-point routing protocols) have been proposed for a wireless mesh (point-to-point) network capable of communicating between wireless communication devices without using an existing network architecture (see, for example, Non-Patent Documents 1 and 2). [0003] In the point-to-point routing protocol, if the number of terminals constituting the network is large, routing information (routing table) used for relaying is huge, increasing the amount of memory in the terminals and processing for routing search. [0004] In Patent Document 1, the following network communication method is envisaged, that is, the terminals of the point-to-point network are divided into the center terminal (main terminal) and other sub-terminals, and the sub-terminals only send data to one center terminal, and receive data corresp...

Claims

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Application Information

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IPC IPC(8): H04W40/28H04L12/721H04W84/18
CPCH04L45/34H04L45/28H04W40/24H04W84/18
Inventor 川岛佑毅
Owner MITSUBISHI ELECTRIC CORP