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Method for exchanging routing messages in a wireless meshed communication network

A communication network and wireless grid technology, applied in the field of wireless grid-like communication network, can solve the problem of no designation

Inactive Publication Date: 2015-05-06
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not specified in this document how switching between a mode in which a bidirectional data path is established and a mode in which only a single-phase data path is established can be triggered via the root node

Method used

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  • Method for exchanging routing messages in a wireless meshed communication network
  • Method for exchanging routing messages in a wireless meshed communication network
  • Method for exchanging routing messages in a wireless meshed communication network

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Experimental program
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Embodiment Construction

[0042] figure 1 The schematic diagram shows a mesh-like wireless communication network in which embodiments of the method according to the invention are used for routing data packets. The communication network includes a number of network nodes, which are represented as circles, wherein the network nodes can communicate wirelessly with each other. Communication paths between network nodes are shown on the one hand as solid lines and on the other hand as dashed lines. figure 1 The communication network is based on the standard IEEE 802.11s, which specifies data exchange in the L2 layer in a mesh-like communication network. Here, the path-switching protocol HWMP (HWMP=Hybrid Wireless Mesh Protocol, Hybrid Wireless Mesh Protocol) is used for the transfer of data packets, which protocol operates in the so-called "Proactive Tree Building Mode" according to the following embodiment run in. In this case, a routing tree is established from the root network node to the remaining net...

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Abstract

In a method for exchanging routing messages in a wireless meshed communication network with network nodes and a root node, a routing tree is set up with data transmission paths. The root node sends routing requests at regular time intervals to set up the paths, wherein a request contains a specification for a first bidirectional path mode or a second unidirectional path mode. At a respective node, a first field is used to indicate a first or a second node state. If, upon receipt of a request, the first field is in the first state, a routing response is always sent and otherwise not. Next, the node checks the mode specified in the request, ensuring that the respective mode is set. In case of a node to root data transmission, a node also ensures that the first field of the respective network node is in the first state.

Description

technical field [0001] The invention relates to a method for exchanging routing messages in a wireless mesh communication network with a large number of network nodes, and to a corresponding network node and a wireless mesh communication network. Background technique [0002] The prior art discloses many different mechanisms how data can be transmitted along paths in a communication network with a large number of network nodes. Document WO 2008 / 058933 A1 describes a method for setting up bidirectional data transmission paths in a wireless mesh-like communication network with a large number of network nodes. In this case, a routing tree is set up between the wirelessly communicating network nodes starting from a node acting as root network node, the root node sending routing requests to the network nodes at regular time intervals in order to set up the routing tree. In this case, a unidirectional data transmission path is initially established from the individual network nod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/26H04W84/18
CPCH04W40/26H04W84/18H04W40/14H04L45/00
Inventor M.巴尔
Owner SIEMENS AG