Wireless telephone system having a free period allocated to switching between two frequencies
First Claim
1. A method of operating a wireless telephone system of the time division multiple access scheme having base stations connected to a public telephone network and plural mobile wireless terminals for communicating with the base stations, comprising the steps of:
- communicating a state data among said mobile wireless terminals,performing a bi-directional communication between a first mobile wireless terminal and a second mobile wireless terminal out of said plural mobile wireless terminals,causing said first mobile wireless terminal to transmit first data to said base station using a first frequency;
causing said base station to relay said first data transmitted from said first mobile wireless terminal and to transmit said first data to said second mobile wireless terminal using said first frequency; and
causing said second mobile wireless terminal to transmit second data directly to said first mobile wireless terminal,wherein the base station transmits and receives control data to other mobile wireless terminals which are in a reception waiting state using a second frequency, even during the bi-directional communication between said first and second mobile wireless terminals,and wherein a free period is allocated to switching between the first and second frequencies.
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Accused Products
Abstract
A wireless-phone system makes it possible to simplify a radio section of the base station for relaying the predetermined data sent from a mobile wireless terminal by means of a first frequency, and for transmitting/receiving the control data to mobile wireless terminals which are in a reception waiting state by means of a second frequency. A first data sent from a first mobile wireless terminal, out of the bi-directional communications between the first and second mobile wireless terminals, is relayed at a base station to transmit it to the second mobile wireless terminal, and a second data sent from the second mobile wireless terminal is directly transmitted to the first mobile wireless terminal. Thereby, the base station is able to ensure a free period which is allocated to switching of the oscillation frequency of the frequency-selecting oscillators, and to transmission and reception of the control data by the use of the second frequency.
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Citations
8 Claims
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1. A method of operating a wireless telephone system of the time division multiple access scheme having base stations connected to a public telephone network and plural mobile wireless terminals for communicating with the base stations, comprising the steps of:
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communicating a state data among said mobile wireless terminals, performing a bi-directional communication between a first mobile wireless terminal and a second mobile wireless terminal out of said plural mobile wireless terminals, causing said first mobile wireless terminal to transmit first data to said base station using a first frequency; causing said base station to relay said first data transmitted from said first mobile wireless terminal and to transmit said first data to said second mobile wireless terminal using said first frequency; and causing said second mobile wireless terminal to transmit second data directly to said first mobile wireless terminal, wherein the base station transmits and receives control data to other mobile wireless terminals which are in a reception waiting state using a second frequency, even during the bi-directional communication between said first and second mobile wireless terminals, and wherein a free period is allocated to switching between the first and second frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification