Ultraviolet light communication network clock synchronization system and method

Abstract

The invention belongs to the technical field of wireless Ad hoc communication local area network clock synchronization and discloses an ultraviolet light communication network clock synchronization system and method. According to the clock synchronization system, a host-slave mode Ad hoc network topology structure is employed. According to the clock synchronization method, a local clock source of a host is taken as a reference clock; a network NTP clock synchronization protocol, an AODV routing protocol and a quantitative prediction method are optimized and fused; a host carries out time information interaction with a first level intermediate slave, a second level intermediate slave, an Nth level intermediate slave and a destination slave according to a path discovery process; and the clocks of the slaves and the reference clock of the host are synchronized, so the clock of each communication slave on an ultraviolet light communication multi-hop network and the clock of the host are synchronized. According to the system and the method, the energy consumption of the host and the slaves is balanced, the information transmission times in the network is reduced, network loads and an information transmission conflict probability are reduced, the clock synchronization precision of the whole network is ensured, and the system and the method are particularly applicable to communication of military squads.

Description

technical field [0001] The invention belongs to the technical field of clock synchronization of a wireless ad hoc communication local area network, and in particular relates to a clock synchronization system and method for an ultraviolet light communication network. Background technique [0002] Ultraviolet light communication data transmission has high confidentiality and strong anti-interference ability, and can be used for communication in non-line-of-sight concealed complex terrain environments. Due to the limited radius of single-stage ultraviolet communication in the sun-blind band, to achieve the purpose of communication within a certain distance, it is necessary to build a local area network ultraviolet communication system with relay function. The system is easy to carry by individual soldiers, and is suitable for small team communication in the fields of military, security, disaster relief, and fire fighting. Ultraviolet light communication has attracted great att...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: due to the diversity of wireless ad hoc network application environments, temperature changes, electromagnetic interference, oscillator aging and production debugging, there are errors between the local clock and the reference clock

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