Wireless access system and method
First Claim
1. A wireless access system using Carrier Sense Multiple Access for Media Access Control of a host device by terminals, the wireless access system comprising:
- a master station for converting an electrical signal in a downstream direction inputted from the host device into an optical signal and sending out the optical signal to an optical fiber transmission line, and for converting an optical signal in an upstream direction inputted through the optical fiber transmission line into an electrical signal and outputting the electrical signal to the host device;
a plurality of slave stations each for converting an electrical signal in the upstream direction received from any one of the terminals in a wireless communications area into an optical signal and sending out the optical signal to the optical fiber transmission line, and for converting an optical signal in the downstream direction inputted through the optical fiber transmission line into an electrical signal and sending out the electrical signal to the wireless communications area; and
an access control section for transmitting an optical signal in the downstream direction sent out from the master station, to each of the plurality of slave stations through the optical fiber transmission line, transmitting an optical signal in the upstream direction sent out from any one of the plurality of slave stations, to the master station through the optical fiber transmission line, and notifying all other slave stations that the one of the slave stations has outputted the optical signal in the upstream direction.
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Accused Products
Abstract
A wireless access system and method are provided by which the wireless communications area covered by a single access point is increased while maintaining the maintainability of the access point, minimizing an increase in system cost, and avoiding the hidden terminal problem. An access point (12) and terminals (16a to 16c) are connected via a master station (13), an optical multiplexing/demultiplexing section (14), and slave stations (15a to 15c). A downstream signal to the terminals (16a to 16c) from the access point (12) is transmitted such that the master station (13) outputs the downstream signal to each of the slave stations (15a to 15c) in a distributed manner through the optical multiplexing/demultiplexing section (14). An upstream signal to the access point (12) from any one of the terminals (for example, 16a) is transmitted to the master station (13) through a slave station (for example, 15a) and the optical multiplexing/demultiplexing section (14), and also sent to all other slave stations (for example, 15b and 15c) through the master station (13) or the optical multiplexing/demultiplexing section (14).
133 Citations
28 Claims
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1. A wireless access system using Carrier Sense Multiple Access for Media Access Control of a host device by terminals, the wireless access system comprising:
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a master station for converting an electrical signal in a downstream direction inputted from the host device into an optical signal and sending out the optical signal to an optical fiber transmission line, and for converting an optical signal in an upstream direction inputted through the optical fiber transmission line into an electrical signal and outputting the electrical signal to the host device;
a plurality of slave stations each for converting an electrical signal in the upstream direction received from any one of the terminals in a wireless communications area into an optical signal and sending out the optical signal to the optical fiber transmission line, and for converting an optical signal in the downstream direction inputted through the optical fiber transmission line into an electrical signal and sending out the electrical signal to the wireless communications area; and
an access control section for transmitting an optical signal in the downstream direction sent out from the master station, to each of the plurality of slave stations through the optical fiber transmission line, transmitting an optical signal in the upstream direction sent out from any one of the plurality of slave stations, to the master station through the optical fiber transmission line, and notifying all other slave stations that the one of the slave stations has outputted the optical signal in the upstream direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A wireless access method performed by a system using Carrier Sense Multiple Access for Media Access Control of a host device by terminals, the method comprising:
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connecting the host device and the terminals via a master station and a plurality of slave stations;
transmitting a signal in a downstream direction outputted from the host device, to the plurality of slave stations from the master station through a predetermined transmission line; and
transmitting a signal in an upstream direction received by a specific slave station from any one of the terminals in a wireless communications area, to the master station and other slave stations through the predetermined transmission line.
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Specification