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Local routing discovering method for on-demand routing of mobile ad hoc network

A discovery method and routing technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of large network overhead, reduce network overhead, reduce the number and scope of transmission, and reduce the possibility of collision Effect

Inactive Publication Date: 2008-05-14
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a local route discovery method for on-demand routing in a mobile ad hoc network in view of the relatively large network overhead of the route discovery process of the current on-demand routing protocol. The number and range of transmissions in the network can reduce the network overhead of the route discovery process, reduce the possibility of collisions during the transmission of data packets, reduce the transmission delay of data packets and improve the success rate of data packet transmission

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  • Local routing discovering method for on-demand routing of mobile ad hoc network
  • Local routing discovering method for on-demand routing of mobile ad hoc network
  • Local routing discovering method for on-demand routing of mobile ad hoc network

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Embodiment Construction

[0023] In order to complete the local routing discovery method, each node SN, DN, and MN participating in routing in the network needs to establish an MH table, which includes DN1, MH local and T refresh Three fields, as shown in Table 1, each MH record maintains an MH state according to these fields, where: the DN1 field indicates the destination node corresponding to the minimum hops maintained by a record; MH local The field indicates the minimum hop value; T refresh Field indicates when a record was last updated. If a minimum hop record has not been updated within a period of time, it is considered that the record has expired, and the record can be deleted from the MH table or the MH local The value of the field is set to INF (indicating infinity).

[0024] Table 1

[0025] DN1

M H local

T refresh

[0026] Figure 1 is the node initialization process A of the local route discovery method. When a node just joins the network, the node needs ...

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Abstract

The invention discloses a method for detecting a local route of an on-demand route inside a mobile ad hoc network. An intermediate node near the route receives a data massage on a sharing wireless channel and records the least hop number of the arrived nodes according to the head information of the data information; a message for requesting to detect the route is only transferred in an area near the previous interrupted route; then the message for requesting to detect the route is transmitted along the arrived nodes with decreased hop number; when the message for requesting to detect the route arrives the destination node, a unicasting transmission route of the destination node detects that a response message arrives a source node, thus finishing the establishing course from the source node to the destination node. The invention is applicable for the course of detecting the route in the on-demand route inside the mobile ad hoc network, so as to decrease the transmission times and scope of the route detecting message in the network, decrease the network expenditure in the course of route detecting, lower the possibility of collision in the transmission course of the data message, reduce the transmission delay of the data message and increase the success rate of transmission for the data message.

Description

technical field [0001] The invention relates to a route discovery method for on-demand class routing in a mobile ad hoc network. Background technique [0002] The mobile ad hoc network has the characteristics of strong mobility, no center, self-organization, and self-repair. It has a wide range of application requirements in military and civilian applications, and it is expected to play an important role in future communication systems. The function of routing protocol in mobile ad hoc network is to search and maintain the path between communication nodes, as the basis of communication, it is one of the key technologies of ad hoc network. At present, the routing protocols in the adhoc network can be roughly divided into two categories: table-driven routing protocols and on-demand routing protocols. Table-driven routing protocols are derived from wired networks and require periodic update of routing information between nodes to adapt to dynamic changes in network topology, w...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04W40/04
Inventor 赫阳欧阳元新刘玉恒熊璋
Owner BEIHANG UNIV
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