WIRELESS TERMINAL DEVICE AND COMMUNICATION METHOD
First Claim
1. A wireless terminal device that selectively switches among a plurality of communication systems provided so as to overlap with each other for performing communication, the wireless terminal device comprising:
- an instruction reception unit which, when a predetermined communication is produced in a state where a location registration is performed in a first communication system and the predetermined communication is transferred from the first communication system to a second communication system, receives a transfer instruction signal in the first communication system;
a communication request unit which, when the transfer instruction signal is received by the instruction reception unit, captures the second communication system and requests a start of the predetermined communication to which the transfer is instructed, in the second communication system;
a communication processing unit which, after the start of the predetermined communication is requested, when receiving in the second communication system an enabling signal for the request for the start of the predetermined communication, performs the predetermined communication in the second communication system; and
a storage unit which, after the start of the predetermined communication is requested, when the enabling signal is not received in the second communication system, stores a combination of information on a communication area section in the second communication system when the enabling signal is not received, and information on a communication area section in the first communication system when the transfer instruction signal is received;
whereinwhen a combination of information on a communication area section in the second communication system at a time when a new transfer instruction signal is received in the first communication system by the instruction reception unit and the second communication system is newly captured and information on a communication area section in the first communication system at a time when the new transfer instruction signal is received matches with the combination stored in the storage unit, the communication request unit requests to the second communication system the start of the communication to which the transfer is instructed, after newly performing a location registration in a communication area section of the newly captured second communication system.
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Accused Products
Abstract
A mobile telephone device includes: an instruction reception unit which, when a predetermined communication is transferred to a CDMA communication system, receives a handover instruction signal in the LTE communication system; a communication request unit which, when the signal is received, captures the CDMA communication system and requests a start of the communication; a communication processing unit which, when receiving an enabling signal for the request, performs communication in the CDMA communication system; and a storage unit which, when the enabling signal is not received, stores a combination of calling zones of both communication systems; wherein when a combination of a calling zone of the CDMA communication system newly captured in accordance with a new handover instruction and a calling zone in the LTE communication system matches with the stored combination, the communication request unit requests the start of the communication after performing a new location registration.
6 Citations
14 Claims
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1. A wireless terminal device that selectively switches among a plurality of communication systems provided so as to overlap with each other for performing communication, the wireless terminal device comprising:
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an instruction reception unit which, when a predetermined communication is produced in a state where a location registration is performed in a first communication system and the predetermined communication is transferred from the first communication system to a second communication system, receives a transfer instruction signal in the first communication system; a communication request unit which, when the transfer instruction signal is received by the instruction reception unit, captures the second communication system and requests a start of the predetermined communication to which the transfer is instructed, in the second communication system; a communication processing unit which, after the start of the predetermined communication is requested, when receiving in the second communication system an enabling signal for the request for the start of the predetermined communication, performs the predetermined communication in the second communication system; and a storage unit which, after the start of the predetermined communication is requested, when the enabling signal is not received in the second communication system, stores a combination of information on a communication area section in the second communication system when the enabling signal is not received, and information on a communication area section in the first communication system when the transfer instruction signal is received;
whereinwhen a combination of information on a communication area section in the second communication system at a time when a new transfer instruction signal is received in the first communication system by the instruction reception unit and the second communication system is newly captured and information on a communication area section in the first communication system at a time when the new transfer instruction signal is received matches with the combination stored in the storage unit, the communication request unit requests to the second communication system the start of the communication to which the transfer is instructed, after newly performing a location registration in a communication area section of the newly captured second communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A communication method of a wireless terminal device that selectively switches among a plurality of communication systems provided so as to overlap with each other for performing communication, the method comprising:
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an instruction reception step in which, when a predetermined communication is produced in a state where a location registration is performed in a first communication system and the predetermined communication is transferred from the first communication system to a second communication system, a transfer instruction signal is received in the first communication system; a communication request step in which, when the transfer instruction signal is received in the instruction reception step, the second communication system is captured and a start of the predetermined communication to which the transfer is instructed is requested in the second communication system; a communication processing step in which, after the start of the predetermined communication is requested, when receiving in the second communication system an enabling signal for the request for the start of the predetermined communication, the predetermined communication is performed in the second communication system; and a storage step in which, after the start of the predetermined communication is requested, when the enabling signal is not received in the second communication system, a combination of information on a communication area section in the second communication system when the enabling signal is not received, and information on a communication area section in the first communication system when the transfer instruction signal is received is stored;
whereinwhen a combination of information on a communication area section in the second communication system at a time when a new transfer instruction signal is received in the first communication system in the instruction reception step and the second communication system is newly captured and information on a communication area section in the first communication system at a time when the new transfer instruction signal is received matches with the combination stored in the storage step, the start of the communication to which the transfer is instructed is requested to the second communication system in the communication request step, after newly performing a location registration in a communication area section of the newly captured second communication system.
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14. A wireless terminal device which, when receiving by a first communication system incoming call in a second communication system, transmits a response to the incoming call by switching from the first communication system to the second communication system, wherein
if a combination of a location area in the first communication system before the switching and a location area in the second communication system after the switching meets a predetermined condition, the wireless terminal device does not transmit the response to the incoming call.
Specification