Access system and method for ultraviolet light communication network thereof

Abstract

The invention discloses an access system and method for an ultraviolet light communication network, and the method comprises the steps: enabling an ultraviolet light communication node to emit light independently or not to emit light when any ultraviolet light communication node serving as an ultraviolet light communication terminal needs to transmit information in a local area network space of ultraviolet light communication; according to a dominant state or an invisible state respectively represented by light emitting or non-light emitting of an ultraviolet light communication node serving as an ultraviolet light communication terminal, forming the state of the whole ultraviolet light communication network through a light superposition principle, and on the basis, performing channel competition access. Other structures or methods are combined to effectively avoid the basic mechanism, frame structure definition, protocol flow and other aspects of conflict-free competitive access in the prior art, and effectively avoid the defects of competition and conflict during multi-node access in ultraviolet light communication terminal networking application in the prior art.

Description

technical field [0001] The present invention relates to the field of wireless optical communication technology and networking technology, in particular to an access system and method for an ultraviolet communication network, and in particular to a conflict-free and competitive access system for an ultraviolet communication network and its method. Background technique [0002] As a new type of communication technology, wireless optical communication has the advantages of both optical fiber communication and mobile communication. It can realize broadband transmission, flexible networking, no frequency application, anti-electromagnetic interference, and good confidentiality. Therefore, wireless optical communication research has received extensive attention. Specifically, wireless optical communication is a communication technology that uses light as the carrier and free space as the transmission channel. Compared with traditional radio communication, it has the advantages of...

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Problems solved by technology

The advantage of this method is that it is simple and reliable, but the disadvantage is that there may be a waste of communication resources; the other is a conflict avoidance scheme based on contention channels, and each terminal can randomly access the network according to needs, which may cause communication conflicts and requires a relatively complex design collision detection or collision avoidance mechanism, which may eventually degrade network performance

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