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Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing

An access method, ultraviolet light technology, applied in the field of ultraviolet light communication, can solve the problem that the access algorithm cannot be directly applied to ultraviolet light non-line-of-sight communication, and achieve the effect of reducing the probability of generation, reducing the number of hops, and increasing the transmission distance

Inactive Publication Date: 2012-01-18
江苏崛起通讯科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a directional access method for ultraviolet non-line-of-sight communication based on angle perception, which solves the disadvantage that the existing access algorithm cannot be directly applied to ultraviolet non-line-of-sight communication

Method used

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  • Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing
  • Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing
  • Ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing

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Embodiment

[0075] (1) with Figure 4 Take node A and node B as an example, the model of the node is as follows image 3 As shown, assume that the coordinates of node A are (0, 0, 0), and the coordinates of node B are (3, 0), r 1 = 4m, φ t = 30°, θ t =20°, substitute into the formula: , then ∠EAF=31.8°, the coverage of transmitting node A is as follows figure 1 The area of ​​AFDE in is composed of triangle AFE and a semicircle with point B' as the center. It can be calculated as S=7.9885m 2 , Node B is within the coverage of Node A and can communicate.

[0076] (2) The network is initialized, and the interface elevation neighbor list is constructed. Such as Figure 4 As shown, the records in the table include neighbor nodes, interface numbers, and sending elevation angles. Node A has three neighbor nodes, namely B, C, and D, and the interface numbers are 0, 1, and 2 respectively. The launch elevation angles are 10°, 35°, and 60°, respectively. Node B has two neighbor nodes A a...

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Abstract

The invention discloses an ultraviolet light non-line of sight (NLOS) communication directional access method based on angular sensing. The method comprises the steps of: firstly, setting the value of a receiving elevation angle to be 90 degrees, and calculating the coverage area of ultraviolet light NLOS communication according to a divergence angle and a launching elevation angle of an emission node; then designing a node structure of the ultraviolet light NLOS communication, and establishing an interface elevation angle neighbor list; then updating a directional network vector distribution table; then judging whether a channel is idle or not; performing channel reservation; and finally, sending and receiving data to complete the direction access of the ultraviolet light NLOS communication. According to the method disclosed by the invention, an optimal launching elevation angle and an optimal interface number can be selected by an ultraviolet light communication node during channel access according to the interface elevation angle neighbor list, for data transmission. Compared with an access algorithm of a static appointed transmission elevation angle, the method disclosed by the invention has the advantages of reducing the probability in interference node generation, increasing communication transmission distance, reducing a hop count needed by communication, and providing relevant guidance for the node structural design with adoption of an ultraviolet light NLOS communication manner.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet light communication, and relates to a communication access method, in particular to an angle perception-based ultraviolet light non-line-of-sight communication directional access method. Background technique [0002] Currently, broadband access methods are mainly divided into wired access and wireless access. Wired access solutions include telephone lines, cable TV networks, high-speed Ethernet, and full-fiber optic networks. These access methods (such as telephone lines and full-fiber-optic networks) need to be buried in advance, are easily damaged, and are difficult to maintain. Wireless access solutions include LMDS, MMDS, Wi-Fi, WiMAX, etc. Compared with wired access methods, this type of technology has less start-up capital, less initial investment, short construction period, fast service provision, and great flexibility in development , Dynamic allocation of system resources according t...

Claims

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Application Information

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IPC IPC(8): H04B10/10H04B10/11
Inventor 赵太飞柯熙政候兆敏王小瑞于晓冬
Owner 江苏崛起通讯科技有限公司
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