Radio channel selection method and system
First Claim
1. A radio channel selection method comprising the steps of:
- causing a mobile terminal, in an originating operation, to transmit a call setting signal indicating that communication can be performed by either of first and second communication schemes in different communication forms;
causing a radio base station to receive the call setting signal from said mobile terminal, and checking whether there is any available radio channel in the first communication scheme;
if there is an available radio channel in the first communication scheme, transmitting information on the found available radio channel, as a radio channel designation signal, to said mobile terminal;
if there is no available radio channel in the first communication scheme, searching for an available radio channel in the second communication scheme;
if there is an available radio channel in the second communication scheme, transmitting information on the found available radio channel, as a radio channel designation signal, to said mobile terminal; and
if there is no available radio channel in both the first and second communication schemes, transmitting a clear-forward signal to said mobile terminal.
1 Assignment
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Accused Products
Abstract
In a radio channel selection method, when an originating operation is performed, a mobile terminal transmits a call setting signal indicating that communication can be performed by either of first and second communication schemes in different communication forms. A radio base station then receives the call setting signal from the mobile terminal, and it is checked whether there is any available radio channel in the first communication scheme. If there is an available radio channel in the first communication scheme, the selected available radio channel is transmitted, as a radio channel designation signal, to the mobile terminal. If there is no available radio channel in the first communication scheme, a search for an available radio channel in the second communication scheme is performed. If there is an available radio channel in the second communication scheme, the selected available radio channel is transmitted, as a radio channel designation signal, to the mobile terminal. If there is no available radio channel in both the first and second communication schemes, a clear-forward signal is transmitted to the mobile terminal. A radio channel selection system is also disclosed.
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Citations
8 Claims
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1. A radio channel selection method comprising the steps of:
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causing a mobile terminal, in an originating operation, to transmit a call setting signal indicating that communication can be performed by either of first and second communication schemes in different communication forms; causing a radio base station to receive the call setting signal from said mobile terminal, and checking whether there is any available radio channel in the first communication scheme; if there is an available radio channel in the first communication scheme, transmitting information on the found available radio channel, as a radio channel designation signal, to said mobile terminal; if there is no available radio channel in the first communication scheme, searching for an available radio channel in the second communication scheme; if there is an available radio channel in the second communication scheme, transmitting information on the found available radio channel, as a radio channel designation signal, to said mobile terminal; and if there is no available radio channel in both the first and second communication schemes, transmitting a clear-forward signal to said mobile terminal. - View Dependent Claims (2, 3, 4)
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5. A radio channel selection system comprising:
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base stations connected to a mobile switching center; and a plurality of mobile terminals for performing communication with said base stations by selecting a plurality of radio channels in first and second communication schemes in different communication forms, each of said mobile terminals including call setting signal transmission means for, when an originating operation is performed, transmitting a call setting signal indicating that communicating can be performed by either of the first and second communication schemes, and each of said base stations including search means for searching for an available radio channel in the first and second communicating schemes in a predetermined communication scheme order upon reception of a call setting signal from said mobile terminal, channel designation signal transmission means for, when an output from said search means indicates the presence of an available radio channel, transmitting information on the found available radio channel, as a radio channel designation signal, to said mobile terminal, and clear-forward signal transmission means for transmitting a clear-forward signal to said mobile terminal when an output from said search means indicates the absence of an available radio channel. - View Dependent Claims (6, 7, 8)
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Specification