SDMA visible light wireless access system
A wireless access system, space division multiple access technology, applied in the field of space division multiple access visible light wireless access system, can solve the problem that the direction and size of the projected light spot cannot be directly observed and controlled, and the infrared wireless optical communication equipment market is expensive and difficult Realize problems such as space-division multiple-access multiplexing, and achieve the effects of avoiding external wall operations, simple optical system structure, and low price
Inactive Publication Date: 2012-10-17
JINAN UNIVERSITY
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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 densely populated, which also affects its competitiveness in the access network market.
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[0023] The structure diagram of the present invention is as figure 1 , 2 As shown, it includes an access switch (2), a center-side optical transceiver array (1) composed of several center-side optical transceivers (4), and a number of user-side optical transceivers (3). The access switch (2) is connected through an interface cable ( 16) Connect to several center-side optical transceivers (4) respectively, and several central-side optical transceivers (4) of the center-side optical transceiver array (1) are respectively connected to several user-side optical transceivers (3) through visible light laser beams constituting a communication link .
[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 the present embodiment, i...
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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...
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IPC IPC(8): H04B10/16H04B10/18H04B10/14H04B10/116H04J14/00
Inventor 陈长缨
Owner JINAN UNIVERSITY