Wireless communication having operation time correcting function
First Claim
1. A wireless communication system using a GPS time signal from a satellite comprising:
- a plurality of communication networks including a first network operable under a first communication protocol and capable of transmitting a GPS-synchronization signal in synchronism with the GPS time signal, and a second network operable under a second communication protocol different from the first communication protocol; and
a communication device operable to communicate with the first network and the second network under the first communication protocol and the second communication protocol, respectively, and including a receiving part which receives the GPS-synchronization signal from the first network, a transmitting part which transmits an output signal to the second network, and a controlling part which synchronizes a time of transmission of the output signal from the transmitting part to the GPS-synchronization signal, wherein the second network is constructed to correct a synchronization of operation time thereof based on the output signal received from the communication device.
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Accused Products
Abstract
An integrated communication system includes a CDMA network and other network such as a private cordless phone network which operates under a communication protocol different from that of the CDMA network. The CDMA network receives a GPS time signal from a GPS satellite and transmits a GPS-synchronization signal in synchronism with the GPS time signal. When a cellular phone receives an output request signal such as a position registration request signal from the other network, it transmits an output signal such as a position registration signal to the other network at a time synchronized with the GPS-synchronization signal. The other communication network responsively corrects a time of synchronization of its operation time based on the received output signal.
16 Citations
7 Claims
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1. A wireless communication system using a GPS time signal from a satellite comprising:
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a plurality of communication networks including a first network operable under a first communication protocol and capable of transmitting a GPS-synchronization signal in synchronism with the GPS time signal, and a second network operable under a second communication protocol different from the first communication protocol; and
a communication device operable to communicate with the first network and the second network under the first communication protocol and the second communication protocol, respectively, and including a receiving part which receives the GPS-synchronization signal from the first network, a transmitting part which transmits an output signal to the second network, and a controlling part which synchronizes a time of transmission of the output signal from the transmitting part to the GPS-synchronization signal, wherein the second network is constructed to correct a synchronization of operation time thereof based on the output signal received from the communication device. - View Dependent Claims (2, 3)
the transmitting part is constructed to transmit the output signal as a position registration signal in return of a request signal received from the second network.
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3. A wireless communication system of claim 1, wherein:
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the first network is constructed to operate under a code division multiple access method as the first communication protocol; and
the second network is constructed as a privately-owned cordless phone communication network to operate only within private premises.
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4. A wireless communication device for use in an integrated communication system of a plurality of communication networks operable under different communication protocols, one of the networks being capable of transmitting a GPS-synchronization signal in response to a GPS time signal from a GPS satellite, the device comprising:
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a receiving part for receiving the GPS-synchronization signal from the one of the communication networks;
a transmitting part for transmitting an output signal to another of the communication networks; and
a controlling part which synchronizes a time of transmission of the output signal from the transmitting part to the GPS-synchronization signal received by the receiving part, so that the another of the communication networks may correct a synchronization of operation time thereof based on the output signal. - View Dependent Claims (5)
the one of the communication network is constructed to operate under a code division multiple access protocol; and
the second network is constructed as a privately-owned cordless phone communication network to operate only within a private premises.
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6. A wireless communication method using a GPS time signal transmitted from a GPS satellite comprising:
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receiving the GPS time signal and transmitting a GPS-synchronization signal in synchronism with the received GPS time signal in a first communication network which is operable only under a code division multiple access protocol;
receiving the GPS-synchronization signal and transmitting an output signal in synchronism with the received GPS-synchronization signal in a cellular phone which is operable under both of the code division multiple access protocol and another protocol different from the code division multiple access protocol; and
receiving the output signal and correcting a time of synchronization of operation time in a second communication network which is operable only under the another protocol. - View Dependent Claims (7)
the second communication network transmits to the cellular phone a request signal which requests a transmission of the output signal; and
the cellular phone transmits the output signal in response to the request signal.
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Specification