Mobile communication system and switching apparatus
AssigneeNtt Docomo, Inc.
InventorsYuji Aburakawa, Toru Otsu
Life of this patent
Estimating the term…
Abstract
When a signal is sent from a wireless base station 3-1, a wireless modem 10-1 converts the signal to a signal of a unified transmission form. The switch 11-1 switches the signal to one of wireless transceivers 12-1, 12-2 and the optical transceiver 13-1. The wireless transceiver 12-1 or 12-2 sends the signal to a control station 4 or a wireless base station 3—3 via a wireless circuit 20. The optical transceiver 13-1 converts the signal into an optical signal and sends the optical signal to a wireless base station 3-2 via an optical fiber circuit 30.
Claims21
A mobile communication system including a plurality of base stations, a control station which controls said base stations, and switching apparatuses each of which is a part of one of said base station or said control station, wherein said switching apparatuses are connected with each other by a wireless circuit or an optical fiber circuit, said switching apparatus in a sending side comprising:
- a modulation part configured to modulate a first signal into a second signal of a unified transmission form;
- a first switching part configured to switch an output destination of said second signal from said modulation part according to a sending destination of said second signal;
- and
- a wireless signal transmission part configured to send said second signal from said first switching part to a base station or a control station in a receiving side via a wireless circuit;
- an optical signal transmission part configured to send said second signal from said first switching part to a base station or a control station in a receiving side via an optical fiber circuit,
- said switching apparatus in a receiving side comprising:
- a wireless signal receiving part configured to receive a third signal via a wireless circuit;
- an optical signal receiving part configured to receive a third signal via an optical fiber circuit;
- and
- a demodulation part configured to demodulating said third signal.
A switching apparatus in a mobile communication system including a plurality of base stations and a control station which controls said base stations, each of said base stations and said control station having said switching apparatus, said switching apparatus being connected to another switching apparatus via a wireless circuit or an optical fiber circuit, said switching apparatus comprising:
- a modulation part configured to modulate a first signal into a second signal of a unified transmission form;
- a first switching part configured to switching an output destination of said second signal from said modulation part according to a sending destination of said second signal;
- and
- a wireless signal transmission part configured to send said second signal from said first switching part to a base station or a control station in a receiving side via a wireless circuit;
- and
- an optical signal transmission part configured to send said second signal from said first switching part to a base station or a control station in a receiving side via an optical fiber circuit.
A switching apparatus in a mobile communication system including a plurality of base stations and a control station which controls said base stations, each of said base stations and said control station having said switching apparatus, said switching apparatus being connected to another switching apparatus via a wireless circuit or an optical fiber circuit, said switching apparatus comprising:
- a wireless signal receiving part configured to receive a first signal of a unified transmission form suitable for transmission through a wireless circuit and an optical fiber circuit via a wireless circuit;
- an optical signal receiving part configured to receive a first signal of a unified transmission form suitable for transmission through a wireless circuit and an optical fiber circuit via an optical fiber circuit;
- and
- a demodulation part configured to demodulate said first signal of a unified transmission form suitable for transmission through a wireless circuit and an optical fiber circuit when received by the wireless signal receiving part and also when received by the optical signal receiving part.
Dependencies are inferred from the claim text.