A topology control method for post-disaster emergency communication underground flight ad hoc network

A topology control and emergency communication technology, applied in network topology, wireless communication, earthwork drilling and mining, etc., can solve problems such as increased computational complexity and signaling overhead, no application prospects, and mismatch between connectivity dominance set and topology. Achieve the effect of good universality and scalability

Active Publication Date: 2022-02-08
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, this method is only suitable for cases where the frequency of topology changes is low. When the topology changes rapidly, all the alternative connected dominating sets fail, and multi-connected dominating sets need to be rebuilt, which greatly increases the computational complexity and signaling overhead, resulting in The current connectivity dominance set does not match the topology, the service quality cannot be guaranteed, and there is no good application prospect

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  • A topology control method for post-disaster emergency communication underground flight ad hoc network
  • A topology control method for post-disaster emergency communication underground flight ad hoc network
  • A topology control method for post-disaster emergency communication underground flight ad hoc network

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[0038] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] figure 1 This is a schematic diagram of an emergency communication scenario in underground space, taking a mine as an example. In this scenario, affected by mine accidents such as rock bursts, gas explosions, and coal fires, some or all of the mine base stations fixed underground fail and cannot To restore communication services, it is impossible to quickly perceive the disaster situation and send back emergency information to the accident area. Therefore, it is necessary for the UAV swarm to quickly go deep into the dangerous area to perform detection and search and rescue missions. Based on this, the present invention adopts an efficient and stable flight ad hoc network model, that is, an unmanned aerial vehicle is connected to the emergency communication command vehicle through a tethered optical cable, and serves as an unmanned u...

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Abstract

The invention discloses a topology control method for post-disaster emergency communication underground flight ad-hoc network. Firstly, a hierarchical method is proposed to maintain the dominating set adaptively, then the connectivity of the dominating set is repaired by maintaining the weighted minimum spanning tree, and finally the failure joint is dynamically detected. nodes, guaranteeing the minimum connected dominating set. In order to ensure that the time complexity of maintaining the minimum connected dominator set after each update is less than the time complexity of recalculation, the present invention only deals with the part of the topology change, and can handle all types of topology changes in the ad hoc network, including the entry of nodes , leave and move, with better universality and scalability.

Description

technical field [0001] The invention belongs to the technical field of post-disaster underground communication, and in particular relates to a topology control method of an ad hoc network in flight. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of infrastructure intelligence, after years of development and construction, it now has the most underground space in the world, including mines, tunnels, subways, civil air defense projects, underground parking lots, etc. With the continuous expansion of the development scale of underground space, the frequency and intensity of underground disasters are also increasing. Once a disaster occurs in the underground space, it is not only very difficult to rescue, but also the comprehensive perception of on-site disaster information, fast return, and the rapid and flexible construction of a rescue emergency communication command network are also major problems. The current ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04W40/24E21F17/18H04W84/06H04W84/18
CPCH04B7/18504H04W40/248E21F17/18H04W84/06H04W84/18
Inventor 王博文孙彦景董锴文牛勇陈岩周家思
Owner CHINA UNIV OF MINING & TECH
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