Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2008-05-20
2008-05-20
Perez-Gutierrez, Rafael (Department: 2617)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C370S347000, C370S321000, C370S346000, C370S337000, C370S331000, C370S324000, C370S395620, C370S503000, C370S507000, C370S509000, C370S510000, C455S436000
Reexamination Certificate
active
10927110
ABSTRACT:
In the case of radio base stations of different kinds, a synchronization in a radio section cannot be established so that the efficiently effective use of electric waves cannot be retained. According to the invention, therefore, there is provided a TDMA type mobile communication system100comprising: a plurality of radio base stations of different system kinds (i.e., a general type radio base station1, an IP connection type radio base station10and a main digital cordless phone2); mobile phones5A and5B wirelessly connected with the plural radio base stations; and a private branch exchange4wired with the radio base stations. The radio base station receives, when a synchronized operation mode is decided, a frame signal containing a control CH signal, from a reference radio base station (i.e., a reference station); and times the transmission of the frame signal of a local station to the transmission position of the control CH signal in the frame signal, thereby to establish a frame synchronization in a radio section between own station and the reference radio base station.
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Miyawaki Katsushi
Takahashi Yuuichi
Antonelli, Terry Stout & Kraus, LLP.
Hitachi Communication Technologies Ltd.
Hitachi Hybrid Network Co., Ltd.
Patel Nimesh
Perez-Gutierrez Rafael
LandOfFree
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