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Indoor visible light communication (VLC) hybrid networking scheme based on room division multiplexing (RDM) and implementation method for switching of indoor VLC hybrid networking scheme

A technology of visible light communication and indoor division multiplexing, which is applied in the field of indoor visible light communication (VLC) hybrid networking scheme and its switching realization, and can solve the problems of low throughput switching efficiency of visible light communication network

Inactive Publication Date: 2013-12-11
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The present invention proposes an indoor visible light communication (VLC) networking scheme and its switching implementation method based on room division multiplexing (RDM) multiple access mode, thereby solving the problems of low indoor visible light communication (VLC) network throughput and switching efficiency

Method used

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  • Indoor visible light communication (VLC) hybrid networking scheme based on room division multiplexing (RDM) and implementation method for switching of indoor VLC hybrid networking scheme
  • Indoor visible light communication (VLC) hybrid networking scheme based on room division multiplexing (RDM) and implementation method for switching of indoor VLC hybrid networking scheme
  • Indoor visible light communication (VLC) hybrid networking scheme based on room division multiplexing (RDM) and implementation method for switching of indoor VLC hybrid networking scheme

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[0027] After the user business is transmitted from the outdoors to the VLC network, according to the management and configuration of the scheduler, the user's location is divided into several groups, and the LED array in a certain room only broadcasts the corresponding information of the user in the room; the optical signal is still evenly distributed in each room, but the signals of adjacent rooms are naturally separated by walls and doors, so there is no interference; at the same time, LED lights in different rooms transmit different information at the same time, thereby improving the throughput of the network. When the downlink data frame arrives at the scheduler, the MAC frame read / write module reads out its MAC address, identifies the user, searches the database, and determines the destination room, then generates a data frame and sends it to the digital switching matrix, and the digital switching matrix The frame is transferred to the corresponding output port. To implem...

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Abstract

The invention provides an indoor visible light communication (VLC) hybrid networking scheme based on room division multiplexing (RDM) and an implementation method for switching of the indoor VLC hybrid networking scheme. During hybrid networking, an upstream adopts WiFi (wireless fidelity), and a downstream adopts the VLC based on an LED (light emitting diode) array. A VLC network scheduler is used for reading and writing data frames from / to an external network and configuring and managing the network, so that an RDM multi-address access mode is realized; meanwhile, switching of a user between different rooms can be efficiently finished; compared with a conventional broadcast type indoor VLC network, the indoor VLC hybrid networking scheme has the advantage that the handling capacity of the network is greatly improved.

Description

technical field [0001] The present invention relates to the field of visible light communication (VLC), in particular to an indoor visible light communication (VLC) hybrid networking scheme based on room division multiplexing (RDM) and a switching implementation method thereof. Background technique [0002] Over the past few decades, wireless communication, especially mobile communication, has made great progress, meeting the universal access needs, and at the same time improving the quality of our daily life. However, the development of wireless communication is constrained by the shortage of spectrum resources in the microwave frequency band, and the effect of improving the bandwidth through technological improvement in the existing frequency band is limited. Expand the frequency band used for wireless communication to a higher frequency direction to increase the transmission bandwidth. With the emergence of white LED devices, it is possible to use the higher-frequency vi...

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Application Information

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IPC IPC(8): H04B10/116H04L12/24
Inventor 黄治同张馨跃纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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