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OLSR routing protocol control information dynamic generation method

A technology of protocol control information and dynamic generation, applied in wireless communication, digital transmission systems, electrical components, etc., can solve problems such as increased routing overhead, expired topology information, OLSR cannot perceive node movement and network topology changes, etc., to achieve The effect of reducing routing overhead

Active Publication Date: 2020-09-15
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] In the standard OLSR routing protocol, the cycle of generating and sending these control messages is fixed. However, the fixed cycle cannot adapt to the dynamic changes of the network topology. In the environment where the nodes move rapidly or the network topology changes dynamically, OLSR cannot perceive the node movement. and network topology c

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  • OLSR routing protocol control information dynamic generation method
  • OLSR routing protocol control information dynamic generation method
  • OLSR routing protocol control information dynamic generation method

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Embodiment

[0044] A kind of OLSR (Optimized Link State Routing, optimal link state routing) protocol control information dynamic generation method, described control information dynamic generation method comprises the following steps:

[0045] S1, initialization, according to the HELLO (handshake) message sending interval default value H in the OLSR standard protocol I Set the HELLO message timer, every H I Timeout timeout interrupt; according to the OLSR standard protocol TC (Topology Control, topology control) message sending interval default value T I Set TC message timer, every T I The duration sends a timeout interrupt;

[0046] S2, judge whether the HELLO message timer is overtime, if overtime, then dynamically adjust the HELLO message sending interval according to the node neighbor table change situation, the process is as follows:

[0047] S2.1. When the HELLO message timer expires, count the changes in the number of neighbor nodes in the neighbor table of the node in the curr...

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Abstract

The invention discloses an OLSR routing protocol control information dynamic generation method. An OLSR routing protocol transmits a control message at a fixed control message interval to obtain the link states of surrounding nodes, so that a routing table from a source node to a target node is established. A control message in a fixed period cannot adapt to dynamic change of network topology, andnodes cannot sense node movement and network topology change in an environment with dynamic change of the network topology, so that topology information is out of date. In an environment in which thenetwork topology changes slowly, the OLSR broadcasts a control message periodically, which increases the routing overhead. Based on the defects of a standard OLSR protocol, the sending frequency of HELLO messages is dynamically adjusted according to the change condition of a node neighbor table, and the sending frequency of TC messages is dynamically adjusted according to the change condition ofan MPR Selector set of MPR nodes. Through the method, the routing overhead of the OLSR protocol is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of mobile ad hoc networks, in particular to a method for dynamically generating OLSR routing protocol control messages, which uses dynamic self-adaptive sending of control messages on the basis of the original OLSR protocol to improve network routing performance. Background technique [0002] Mobile ad hoc network (MANET) has the characteristics of automatic network organization, automatic healing, multi-hop transmission, high bandwidth, and support for high-speed mobility. Mobile ad hoc networks have broad application prospects in military, wireless sensor networks, emergency communications, unmanned aerial vehicles, and Internet of Vehicles. The technical difficulties of the mobile ad hoc network mainly focus on the routing protocols of the mobile ad hoc network, among which the OLSR (Optimized Link State Routing, optimized link state routing) protocol is one of the widely used routing protocols. OLSR opt...

Claims

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Application Information

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IPC IPC(8): H04W40/24H04W84/18H04L12/759H04L45/28
CPCH04W40/248H04W84/18H04L45/028
Inventor 余华吴俊文季飞陈芳炯
Owner SOUTH CHINA UNIV OF TECH
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