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SDN-based vehicle self-organizing network mobile switching system and method

A technology of vehicular ad hoc network and handover system, which is applied in the field of vehicular ad hoc network mobile handover, which can solve problems such as a large amount of signaling overhead and high handover delay, and achieve the effect of saving signaling overhead and reducing download volume

Active Publication Date: 2019-04-12
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When nodes frequently move and switch, a large amount of signaling overhead will be generated, resulting in high switching delay

Method used

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  • SDN-based vehicle self-organizing network mobile switching system and method
  • SDN-based vehicle self-organizing network mobile switching system and method

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Embodiment Construction

[0064] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] The application scenario of the present invention is: the source node Car1 first enters the communication area of ​​the RSU1, sends a routing request to the RSU1 and sends a message to the target node Car2 for communication. The message that the target node Car2 replies to the source node Car1 is forwarded to RSU1 by multiple switches in the network. After the vehicle moves, the source node Car1 enters the communication area of ​​RSU2 and continues to communicate with the target node Car2. The problem that the present invention is dedicated to solving is: when the source node Car1 moves from the communication area of ​​RSU1 to the communication area of ​​RSU2, how to ensure the correct forwarding of the data packet and the continuity of the session when communicating with the source node Car1 and the target node Car2.

[0066]...

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Abstract

The invention discloses an SDN-based vehicle self-organizing network mobile switching system. The system comprises the following steps: according to a network topology and vehicle node access information acquired in real time, predicting the strength and the position of a switch signal received by a vehicle node at the next moment, when judging that the vehicle node is to be switched from one switch to another switch, entering a pre-switching state; respectively calculating the shortest path of a correspondent node CN to HoA and CoA that communicates with a routing calculator by the routing calculator according to the address mapping (HoA, CoA) of the vehicle node, and generating a path pair; selecting a switch that minimizes the total overhead of number of issued flow tables and the forwarding path length as an optimal forwarding switch by an LMA selector, that is LMA; and inserting flow table information including the shortest path from the CN to the CoA on a switch between the LMA and the CoA. The SDN-based vehicle self-organizing network mobile switching system provided by the invention can realize dynamic routing, save information overhead, and reduce the switching delay and packet loss rate.

Description

technical field [0001] The invention relates to an SDN-based mobile switching method for a vehicle ad hoc network. Background technique [0002] Today, people's mobile devices and mobile traffic are increasing, resulting in new and growing demands for vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications. During the moving process, the vehicle frequently switches from one base station to another base station. This frequent switching will affect the loss rate of data packets and the continuity of sessions. Therefore, a key challenge of today's VANET (Vehicle Ad Hoc Network) is how to provide high-quality network services with low packet loss rate and handover delay in the case of a large number of mobile devices and frequent movements. [0003] Regarding mobility management issues in vehicular ad hoc networks, IETF has proposed some mechanisms, such as MIPv4 and MIPv6. These mechanisms utilize IP tunneling and mobility proxies to ensure session continu...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W4/44H04W8/02H04W24/02H04W36/00H04W36/30H04W40/02H04W40/20H04L12/721H04L12/741H04L45/74
CPCH04L45/12H04L45/745H04W4/02H04W4/44H04W8/02H04W24/02H04W36/0088H04W36/30H04W40/02H04W40/20
Inventor 何振茜付彬
Owner HUNAN UNIV
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