Visible-light communication system enabling 73 Mb/s data streaming

Abstract

The hOME Gigabit Access (OMEGA) home-area-network project aims at bridging the gap between home and access network and providing Gb/s connectivity to users. The project considers a combination of various technologies such as radio-frequency and wireless optical links operating at infrared and visible wavelengths. When combined with power-line communications (PLC), this enables a home backbone that meets the project's "without new wires" vision. A technology-independent MAC layer will control this network and provide services as well as connectivity to any number of devices the user wishes to connect to in any room of a house/apartment. In order to make this vision come true, substantial progress had to be achieved in the fields of optical wireless physical layer development and data-link-layer protocol design. This paper reports an experimental demonstration of an indoor visible-light wireless link including a MAC layer protocol adapted to optical wireless communication s systems. The system operates at 84 Mb/s broadcast and was successfully used to transmit three highdefinition video streams

Color Intensity Modulation for Multicolored Visible Light Communications

“…CIM first sets a specific region in signal space as the target subspace 1 (or the target point) which is mapped from a region in color space, satisfying lighting constraints. After that, symbols' positions and probabilities are analyzed for maximum mutual information (capacity) on conditions that the 1 It is mathematically not a subspace passing through the origin but a shift of a subspace. However, the term subspace is used in this letter instead of subset in order to help visual imagination.…”

A Parallel Transmission MAC Protocol in Hybrid VLC-RF Network

“…In this section, the PT-MAC protocol will be validated through two performance metrics: throughput and transmission efficiency. The numerical result also bases on the parameters given in the Table I From the equation 7, (9) and 14, the packet allocation scheme is associated with the variables: the number of the nodes is n, the number of the sub-frame is N, and the length of the sub-frame is l. Setting 5 n  and 50 N  , we reported the throughput of the hybrid network supporting the PT-MAC protocol that depends on the length of the sub-frame, which is shown in Fig. 6.…”

“…In order to overcome these disadvantages of VLC technology, scholars proposed the concept of hybrid network with VLC and RF and devote their energy to study the MAC protocol of the hybrid network. Olivier [8], [9] described the next generation home network with using radio frequency and visible light technologies. In [10], Rahaimc et al proposed an indoor hybrid system that contains WiFi and VLC in which VLC is only used for broadcasting.…”

Visible Light Communication Physical Layer Design for Jist Simulation

“…Typical VLC use case scenario [5] VLC infrastructure: Figure 1 shows typical VLC use case scenario where source of data represents ceiling light hardware with programmable LED light array sources. On the other side there is a consumer (PC-laptop device) that consumes data being provided by the ceiling light.…”