CONTROL DEVICE, HANDOVER CONTROL METHOD AND MOBILE COMMUNICATION SYSTEM
First Claim
1. A control device, which constitutes a mobile communication system together with a mobile host, or a moving network comprising a plurality of mobile hosts, and a plurality of mutually connectable access interfaces each constituting an interface for the connection to a core network at the mobile host or moving network, and which serves to control a handover relating to the connection to the core network at the access interfaces, comprising:
- connection status acquiring means for acquiring information on the connection status to the core network at each access interface, from each access interface;
handover predicting means for predicting a subsequent handover on the basis of the information on the connection status to the core network at each access interface; and
changing means for dynamically changing the access interface adopted as the connection interface in accordance with predetermined logic when a predetermined condition is satisfied on the basis of the information on the connection status to the core network at each access interface or the prediction information for a subsequent handover.
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Abstract
An object of the present invention is to avoid packet loss and implement a seamless handover by minimizing the handover latency when a handover is implemented by a multihomed moving network (MN) or a mobile host (MH). The present invention is a mobile communication system that is constituted comprising an MN, a plurality of AI each constituting an interface for the connection to a core network at the MN, and a control device (MMF), wherein the MMF dynamically changes the AI adopted as the connection interface when a predetermined condition is satisfied on the basis of the connection status to the core network at each AI or the prediction information for a subsequent handover. In so doing, the control device continues the transmission and receipt of data with respect to an appropriate AI capable of maintaining a predetermined communication quality, and maintains the connection to the core network of another AI while causing this AI to enter a closed state in which the transmission and receipt of data is disabled.
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Citations
13 Claims
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1. A control device, which constitutes a mobile communication system together with a mobile host, or a moving network comprising a plurality of mobile hosts, and a plurality of mutually connectable access interfaces each constituting an interface for the connection to a core network at the mobile host or moving network, and which serves to control a handover relating to the connection to the core network at the access interfaces,
comprising: -
connection status acquiring means for acquiring information on the connection status to the core network at each access interface, from each access interface;
handover predicting means for predicting a subsequent handover on the basis of the information on the connection status to the core network at each access interface; and
changing means for dynamically changing the access interface adopted as the connection interface in accordance with predetermined logic when a predetermined condition is satisfied on the basis of the information on the connection status to the core network at each access interface or the prediction information for a subsequent handover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A handover control method by a mobile communication system that is constituted comprising a mobile host, or a moving network comprising a plurality of mobile hosts;
- a plurality of mutually connectable access interfaces each constituting an interface for the connection to a core network at the mobile host or moving network; and
a control device for controlling a handover relating to the connection to the core network at the access interfaces,wherein the control device dynamically changes the access interface adopted as the connection interface in accordance with predetermined logic when a predetermined condition is satisfied on the basis of the connection status to the core network at each access interface or the prediction information for a subsequent handover.
- a plurality of mutually connectable access interfaces each constituting an interface for the connection to a core network at the mobile host or moving network; and
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13. A mobile communication system that is constituted comprising a mobile host, or a moving network comprising a plurality of mobile hosts;
- a plurality of mutually connectable access interfaces each constituting an interface for the connection to a core network at the mobile host or moving network; and
a control device for controlling a handover relating to the connection to the core network at the access interfaces, wherein the control device comprises;
connection status acquiring means for acquiring information on the connection status to the core network at each access interface, from each access interface;
handover predicting means for predicting a subsequent handover on the basis of the information on the connection status to the core network at each access interface; and
changing means for dynamically changing the access interface adopted as the connection interface in accordance with predetermined logic when a predetermined condition is satisfied on the basis of the information on the connection status to the core network at each access interface or the prediction information for a subsequent handover.
- a plurality of mutually connectable access interfaces each constituting an interface for the connection to a core network at the mobile host or moving network; and
Specification