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Route selection in wireless network

A wireless network and routing technology, applied in wireless communication, electrical components, etc., can solve the problems of not finding the best end-to-end route, unsatisfactory cache route, etc.

Active Publication Date: 2013-06-12
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the best end-to-end route may not be found because the route cached in the intermediate nodes may not be the best route to the destination node
The metrics may change due to wireless network dynamics, making cached routing less ideal

Method used

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  • Route selection in wireless network
  • Route selection in wireless network
  • Route selection in wireless network

Examples

Experimental program
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Embodiment Construction

[0016] When a source node / mesh point wishes to send a data packet / frame to a certain destination node, it checks the route in its routing table. If there is a valid route, it delivers the packet / frame to the next hop specified in the routing table for this destination node. If no valid route exists, the source node initiates route discovery by flooding a route request (RREQ) message over the wireless mesh / ad hoc network. The data packets / frames may originate in / by the node, or if the node is a wireless access point, the data packets / frames may originate from a station associated with the node. It is possible that a source node needs to discover routes / paths to multiple destination nodes. The source node can either disseminate the RREQ per destination, or, to reduce routing overhead, flood the network with a single RREQ message with a list containing the addresses of multiple destination nodes in it.

[0017] figure 1 is an example RREQ message format, other formats are poss...

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PUM

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Abstract

The invention describes a system for finding out a route between a source node and a destination node in a wireless network and a method thereof. The method comprises the following steps: the source node sets an intermediate response mark of a route request message; the wireless network is subject to flooding by the route request message; and a first intermediate node with an effective route to the destination node responds the route request message by a route response message. The invention further describes a system and a method for finding out a best route when the route response message is changed into a first route response message. The system and the method comprise: the best route between the destination node and the source node is selected by the destination based on accumulation volume received in the route request message received by the destination node, another route response message is created, and the another route response message is subject to unicast to the source node.

Description

[0001] This application is a divisional application of an invention patent application with a filing date of November 9, 2005, an application number of 200580052021.7, and an invention title of "routing selection in wireless networks". technical field [0002] The present invention relates to wireless networks, and in particular to wireless mesh networks. More specifically, the invention relates to the handling of routing request messages in on-demand routing protocols. Background technique [0003] On-demand routing protocols such as the Ad Hoc On-Demand Distance Vector (AODV) routing protocol specified by the MANET working group in the IETF use route request and route reply mechanisms to establish two Routing between nodes. When a source node wishes to send a data packet / frame to a destination node, if the source node does not have and needs a valid route to the destination node, the source node sends a route request (RREQ) by flooding the network. ) message to discover ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/24H04W40/02
Inventor 刘航
Owner INTERDIGITAL CE PATENT HLDG