System for and its method of controlling handover, mobile terminal, and apparatus for controlling handover
First Claim
1. A system for controlling handover, comprising:
- a mobile terminal which enables communication with a plurality of wireless systems having wireless access stations; and
a handover-controlling apparatus which executes control of handover for said mobile terminal which travels among a plurality of types of the wireless systems, wherein said mobile terminal comprises;
a destination wireless system determining unit which receives downlink signals from two or more of the wireless access stations so as to determine which of the corresponding wireless systems accommodates a destination wireless access station based on reception quality of the downlink signals; and
a destination wireless system reporting unit which sends information indicating said determined wireless system to said handover-controlling apparatus, and said handover-controlling apparatus comprises a handover-controlling unit which controls handover operations for said mobile terminal based on the information indicating the determined wireless system which is sent from said destination wireless system reporting unit.
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Accused Products
Abstract
A system for controlling handover is disclosed that includes a mobile terminal that enables communications with multiple wireless systems having wireless access stations, and a handover-controlling apparatus that executes control of handover for the mobile terminal, which travels among multiple types of wireless systems. The mobile terminal includes a destination wireless system determining unit that receives downlink signals from the corresponding wireless access stations so as to determine which wireless system accommodates a destination wireless access station based on reception quality of downlink signals. The mobile terminal also includes a destination wireless system reporting unit that sends information indicating the determined wireless system to the handover-controlling apparatus. The handover-controlling apparatus includes a handover-controlling unit that controls handover operations for the mobile terminal based on the information indicating the determined wireless system, which is sent from the destination wireless system reporting unit.
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Citations
11 Claims
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1. A system for controlling handover, comprising:
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a mobile terminal which enables communication with a plurality of wireless systems having wireless access stations; and
a handover-controlling apparatus which executes control of handover for said mobile terminal which travels among a plurality of types of the wireless systems, wherein said mobile terminal comprises;
a destination wireless system determining unit which receives downlink signals from two or more of the wireless access stations so as to determine which of the corresponding wireless systems accommodates a destination wireless access station based on reception quality of the downlink signals; and
a destination wireless system reporting unit which sends information indicating said determined wireless system to said handover-controlling apparatus, and said handover-controlling apparatus comprises a handover-controlling unit which controls handover operations for said mobile terminal based on the information indicating the determined wireless system which is sent from said destination wireless system reporting unit. - View Dependent Claims (2, 3)
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- 4. An apparatus for controlling handover which executes control of handover for a mobile terminal that travels among a plurality of types of wireless systems, comprising a handover-controlling unit which controls handover operations for said mobile terminal based on information indicating a wireless system which is sent from said mobile terminal.
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8. A mobile terminal which enables communication with a plurality of wireless systems having wireless access stations and handover to a plurality of types of the wireless systems, comprising:
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a destination wireless system determining unit which receives downlink signals from two or more of the wireless access stations so as to determine which of the corresponding wireless systems accommodates a destination wireless access station based on reception quality of the received downlink signals; and
a destination wireless system reporting unit which sends to an apparatus for controlling handover at the network side the information indicating said determined wireless system. - View Dependent Claims (9, 10)
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11. A method of controlling handover in a system for controlling handover which comprises a mobile terminal that enables communication with a plurality of wireless systems having wireless access stations and an apparatus for controlling handover that executes control of the handover for said mobile terminal that travels among a plurality of types of the wireless systems,
said method comprising the steps of: -
receiving, at said mobile terminal, downlink signals from two or more wireless access stations so as to determine which of the corresponding wireless systems accommodates a destination wireless access station based on reception quality of received downlink signals; and
sending, from said mobile terminal, information indicating said determined wireless system to said apparatus for controlling handover, and controlling, by said apparatus, handover operations for said mobile terminal based on the information indicating said reported wireless system.
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Specification