Radiocommunication system using time-division digital frames
First Claim
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1. A radiocommunication system for performing bidirectional simultaneous communication, comprising:
- a base station having transmitting means for dividing each of a plurality of digital frames into a plurality of time slots and assigning a plurality of consecutive channel numbers to the time slots of each digital frame, each including a bit and frame synchronization field, an address field, a control field, a transmit information field, and a frame check and correct sequence field, and transmitting the time-division digital frames as a radio signal of a first frequency, and receiving means for receiving a radio signal of a second frequency; and
a plurality of terminal stations each having receiving means for receiving the radio signal of the first frequency transmitted from the transmitting means of said base station and transmitting means for selecting at least one of said channels in said plurality of time-division digital frames to which said plurality of consecutive channel numbers are added and each of which has a frame structure which is the same as the frame structure of each of said time-division digital frames received from said base station, and transmitting the time-division digital frame of the selected channel to said base station as a radio signal of the second frequency.
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Abstract
A radiocommunication system comprising a base station and a plurality of terminal stations. The base station includes a transmitting section for arranging a plurality of digital frames on a time-division basis, assigning a channel number to each digital frame, and transmitting the time-division digital frames as a radio signal of a first frequency. Each terminal station includes a receiving section for receiving the radio signal transmitted from the transmitting section of the base station, and separating the time-division digital frames for each channel in accordance with the channel number.
75 Citations
16 Claims
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1. A radiocommunication system for performing bidirectional simultaneous communication, comprising:
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a base station having transmitting means for dividing each of a plurality of digital frames into a plurality of time slots and assigning a plurality of consecutive channel numbers to the time slots of each digital frame, each including a bit and frame synchronization field, an address field, a control field, a transmit information field, and a frame check and correct sequence field, and transmitting the time-division digital frames as a radio signal of a first frequency, and receiving means for receiving a radio signal of a second frequency; and a plurality of terminal stations each having receiving means for receiving the radio signal of the first frequency transmitted from the transmitting means of said base station and transmitting means for selecting at least one of said channels in said plurality of time-division digital frames to which said plurality of consecutive channel numbers are added and each of which has a frame structure which is the same as the frame structure of each of said time-division digital frames received from said base station, and transmitting the time-division digital frame of the selected channel to said base station as a radio signal of the second frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radiocommunication system for performing bidirectional simultaneous communication, comprising:
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a first terminal station having transmitting means for dividing each of a plurality of digital frames into a plurality of time slots and assigning a plurality of consecutive channel numbers to the time slots of each digital frame, each including a bit and frame synchronization field, an address field, a control field, a transmit information field, and a frame check and correct sequence field, selecting at least one of the channels in the time-division digital frames, and transmitting the time-division digital frame of the selected channel as a radio signal of a first frequency; a second terminal station having transmitting means for adding said plurality of consecutive channel numbers, which are periodically repeated, to said plurality of time-division digital frames, selecting at least one of the channels other than said selected at least one of the channels in the time-division digital frames, and transmitting the time-division digital frame of the selected channel as a radio signal of a first frequency; a base station having receiving means for receiving and separating the time-division digital frames transmitted from said first and second terminals for each of the channels and recognizing channel numbers added to the channels selected by said first and second terminal stations, transmitting means for adding said plurality of consecutive channel numbers, which are periodically repeated, to said plurality of time-division digital frames, selecting a digital frame of the same channel as the channel selected by said first terminal station, transmitting the time-division digital frame of the selected channel to said first terminal station as a radio signal of a second frequency, selecting a digital frame of the same channel as the channel selected by said second terminal station, and transmitting the time-division digital frame of the selected channel of said second terminal station as a radio signal of the second frequency; and interface means provided on said base station, for transmitting and receiving digital data to and from a digital network to insert data or control information into the time-division digital frame.
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10. A radiocommunication system for performing bidirectional simultaneous communication, comprising:
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a base station having transmitting means for dividing each of a plurality of digital frames into a plurality of time slots and assigning a plurality of consecutive channel numbers to the time slots of each digital frame, each including a bit and frame synchronization field, an address field, a control field, a transmit information field, and a frame check and correct sequent field, and transmitting the time-division digital frames as a radio signal of a first frequency, and receiving means for receiving a radio signal of a second frequency; and a plurality of terminal stations each having receiving means for receiving the radio signal of the first frequency transmitted from the transmitting means of said base station, and recognizing and separating each channel from each digital frame, and transmitting means for selecting at least one of said channels in said plurality of time-division digital frames to which said plurality of consecutive channel numbers are added and each of which has a frame structure which is the same as the frame structure of each of said time-division digital frames received from said base station, and transmitting the time-division digital frame of the selected channel of said base station as a radio signal of the second frequency; wherein the receiving means of said base station receives the time-division digital frames of the second frequency transmitting from the terminal stations and separates the time-division frames for each of the channels.
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11. A radiocommunication system for performing bidirectional simultaneous communication, comprising:
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a first terminal station having transmitting means for dividing each of a plurality of digital frame into a plurality of time slots and assigning a plurality of consecutive channel numbers to the time slots of each digital frame, each including a bit and frame synchronization field, an address field, a control field, a transmit information field and a frame check and correct sequence field, selecting at least one of the channels in the time-division digital frames, and transmitting the time-division digital frame of the selected channel as a radio signal of a first frequency; a second terminal station having transmitting means for adding said plurality of consecutive channel numbers, which are periodically repeated, to said plurality of time-division digital frames, each including the bit and frame synchronization field, the address field, the control field, the transmit information field and the frame check and correct sequence field, selecting at least one of the channels other than said selected at least one of the channels in the time-division digital frames, and transmitting the time-division digital frame of the selected channel as a radio signal of the first frequency; a base station having receiving means for receiving and separating the time-division digital frames transmitted from said first and second terminals for each of the channels and recognizing channel numbers added to the channels selected by said first and second terminal stations, transmitting means for adding said plurality of consecutive channel numbers, which are periodically repeated, to said plurality of time-division digital frames, each including the bit and frame synchronization field, the address field, the control field, the transmit information field and the frame check and correct sequence field, selecting a digital frame of the same channel as the channel selected by said first terminal station, transmitting the time-division digital frame of the selected channel to said first terminal station as a radio signal of a second frequency, selecting a digital frame of the same channel as the channel selected by said second terminal station, and transmitting the time-division digital frame of the selected channel to said second terminal station as a radio signal of the second frequency; and interface means provided on said base station, for transmitting and receiving digital data to and from a digital network to insert data or control information into the time-division digital frame. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification