Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

SDMA visible light wireless access system

A wireless access system and space division multiple access technology, which is applied in the field of space division multiple access visible light wireless access systems, can solve the problem that the orientation of the projected light spot and the small person cannot be directly observed and controlled, and the market price of infrared wireless optical communication equipment is expensive. , It is difficult to realize the problem of space division multiple access multiplexing, so as to avoid the external wall operation, the structure of the optical system is simple, and the price is low.

Inactive Publication Date: 2006-11-22
JINAN UNIVERSITY
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These requirements have greatly increased the equipment and labor costs of manufacturing and commissioning
In addition, infrared optical systems and infrared optoelectronic devices are higher than visible light optical systems and optoelectronic devices in terms of manufacturing costs and procurement costs.
The above factors make the existing infrared wireless optical communication equipment expensive in the market, and cannot be popularized and used in the cost-sensitive access equipment market
In addition, for infrared-based wireless optical communication equipment, the orientation and size of the projected light spot cannot be directly observed and controlled, and it is difficult to implement space division multiple access when users are dense, which also affects its competition in the access network market force

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • SDMA visible light wireless access system
  • SDMA visible light wireless access system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] The structure diagram of the present invention is as figure 1 , 2 As shown, it includes an access switch 2, a central-side optical transceiver array 1 composed of several central-side optical transceivers 4, and several user-side optical transceivers 3. The access switch 2 is connected to several central-side optical transceivers 4 through interface cables 16, respectively. Several center-side optical transceivers 4 of the central-side optical transceiver array 1 are respectively connected to several user-side optical transceivers 3 through visible light laser beams forming communication links.

[0024] Each of the above-mentioned communication links can form a point-to-point duplex communication relationship between uplink and downlink laser beams that are parallel and opposite in direction, or a point-to-point simplex communication relationship that only consists of downlink laser beams.

[0025] In this embodiment, there are 24 user-side optical transceivers 3, 24 u...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a space division multiple access visible light wireless access system, which comprises the following parts: access exchange (2), center side fiber optic array(1) which is composed of several center side fiber optics (4) and several user side fiber optics (3), wherein the access exchange (2) connects several center side fiber optics (4) through interface cable (16); the center side fiber optics (4) of center side fiber optic array(1) aim several user side fiber optic (3) by visible light laser beam which makes up communication chain circuit; the communication chain circuit can use upward and descending two parallel laser beams to makeup duplex communication relation with corresponding point and use descending laser beam to makeup simplex communication relation with corresponding point. The invention reduces the cost, which is convenience to fix.

Description

Technical field: [0001] The invention is a space division multiple access visible light wireless access system, which belongs to the innovative technology of communication access network. Background technique: [0002] There are many structures of the existing communication access network. How to realize broadband access network while achieving low cost has always been a headache for the communication industry. Among them, optical fiber access can solve the bandwidth problem, but the cost of equipment is high, and it is difficult to lay and connect. Radio frequency wireless access solves the problem of laying costs, but factors such as limited bandwidth, scarce electromagnetic wave resources need to be paid for, and people are more and more concerned about electromagnetic pollution limit its promotion and use. Copper cable access utilizes existing copper cable resources, but users have limited bandwidth, and the exclusive right to copper cable resources restricts competitio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04B10/116H04J14/00
Inventor 陈长缨
Owner JINAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com