MOBILE CONTROL DEVICE AND HANDOVER CONTROL METHOD
First Claim
1. A handover control method in a mobile communication system that performs handover control by changing base stations that communicate with a mobile terminal as the mobile terminal moves, and comprising:
- a first step of selecting one or more handover base station candidates based on the communication state;
a second step of deciding a multicast transmission rate for multicasting communication data based on the communication capabilities of each of the handover base station candidates;
a third step of multicasting the communication data to each of the handover base station candidates at the decided multicast transmission rate; and
a fourth step of sending the communication data that has been multicast and saved from a handover base station candidate that has been decided as a handover base station to the mobile terminal.
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Abstract
The present invention is a handover control method in a mobile communication system that performs handover control by switching base stations that communicate with a mobile terminal as the mobile terminal moves. In this handover control method, a mobile control device selects one or more handover base station candidates based on the communication state, and based on the communication capabilities of the handover base station candidates, decides a transmission rate for multicasting communication data, and transmits communication data to each of the handover base station candidates at the decided transmission rate, and a handover base station candidate that is decided as a handover base station sends the saved multicast communication data to the mobile terminal.
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Citations
20 Claims
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1. A handover control method in a mobile communication system that performs handover control by changing base stations that communicate with a mobile terminal as the mobile terminal moves, and comprising:
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a first step of selecting one or more handover base station candidates based on the communication state; a second step of deciding a multicast transmission rate for multicasting communication data based on the communication capabilities of each of the handover base station candidates; a third step of multicasting the communication data to each of the handover base station candidates at the decided multicast transmission rate; and a fourth step of sending the communication data that has been multicast and saved from a handover base station candidate that has been decided as a handover base station to the mobile terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mobile control device in a mobile communication system that performs handover control by changing base stations that communicate with a mobile terminal as the mobile terminal moves, and comprising:
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a handover base station candidate decision unit that selects one or more handover base station candidates based on the communication state; a transmission rate decision unit that decides a transmission rate for multicasting communication data based on the communication capabilities of each of the handover base station candidates; a multicast unit that transmits the communication data to each of the handover base station candidates at the decided multicast transmission rate; and a handover base station decision unit that decides one of the plurality of handover base station candidates as a handover base station. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification