Three-hop relay communication method and device for free optical communication, radio frequency and visible light communication
A technology of visible light communication and relay communication, which is applied in the fields of free light communication, radio frequency and visible light communication three-hop relay communication methods and devices, which can solve the problems of no forwarding protocol, expand communication coverage and reduce communication deployment costs Effect
Active Publication Date: 2020-12-18
SHANGHAI NORMAL UNIVERSITY
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Problems solved by technology
In order to provide a higher data rate and improve system performance, the VLC system can be equipped with a traditional RF link, and the RF channel and the FSO channel are connected by a relay to achieve indoor multimedia services with a high data rate, but there is currently no better forwarding protocol
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0037] A three-hop relay communication method for free optical communication, radio frequency and visible light communication, which is implemented by a relay communication control device in the form of a computer program. The relay communication control device includes a memory, a processor, and a memory stored in the memory and programs executed by the processor, such as figure 1 As shown, the processor implements the following steps when executing the program:
[0038] Step S1: Construct a three-hop hybrid relay system, such as figure 2 shown, and collect system parameters;
[...
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The invention relates to a free optical communication, radio frequency and visible light communication three-hop relay communication method and device, and the method comprises the steps: S1, buildinga three-hop hybrid relay system, and collecting system parameters; S2, respectively obtaining a cumulative distribution function of the instantaneous signal-to-noise ratio of the FSO channel, a cumulative distribution function of the instantaneous signal-to-noise ratio of the RF channel and a cumulative distribution function of the instantaneous signal-to-noise ratio of the VLC channel; S3, determining a probability density function of the instantaneous end-to-end signal-to-noise ratio based on the obtained cumulative distribution function of the instantaneous signal-to-noise ratio of the FSOchannel, the obtained cumulative distribution function of the instantaneous signal-to-noise ratio of the RF channel and the obtained cumulative distribution function of the instantaneous signal-to-noise ratio of the VLC channel; and S4, performing communication control based on the obtained probability density function of the instantaneous end-to-end signal to noise ratio. Compared with the priorart, the method has the advantages that the communication coverage range is expanded, and meanwhile, the communication deployment cost is reduced.
Description
technical field [0001] The present invention relates to a communication technology, in particular to a three-hop relay communication method and device for free optical communication, radio frequency and visible light communication. Background technique [0002] Free Space Optical (FSO) communication system is a visible technology which has various advantages such as offering cheap installation and operating costs, easy deployment, license-free spectrum, immunity to interference and high data rate (10Gbps), therefore, FSO communication is widely used in terrestrial and satellite communication, fiber optic backhaul, backhaul network, data restoration, high-definition transmission. However, for distances of 1 km or longer, atmospheric turbulence can impair the performance of FSO communications. In order to provide better system performance and extend coverage, a hybrid relay system based on RF combined with FSO is established by taking advantage of the complementary advantages...
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IPC IPC(8): H04B10/29H04B10/293H04B10/11H04B10/116
CPCH04B10/11H04B10/116H04B10/29H04B10/2939
Inventor 彭张节贾楠楠方国杏李敏魏爽冯伟杨茹王淑贤王龙龙
Owner SHANGHAI NORMAL UNIVERSITY