Handover control method and handover path determination for use in communication system
First Claim
1. A handover control method for use in a mobile communication system, the method comprising the steps of:
- changing a handover method according to an overlapping zone residence time of a mobile station;
the step of changing a handover method comprising the sub-steps of, ranking the handover methods for the mobile station including a gateway handover method, a base station controller path extension handover method, and a radio link path extension handover method in association with how long the overlapping zone residence time of the mobile station is; and
selecting one of the handover methods for the mobile station among the three methods, which method corresponds to the overlapping zone residence time of the mobile station.
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Abstract
The handover control method for use in a mobile communication system changes a handover method according to an overlapping zone residence time of a mobile station by ranking three handover methods for the mobile station including a gateway handover method, a base station controller path extension handover method, and a radio link path extension handover method in association with how long the overlapping zone residence time of the mobile station is, and by selecting one handover method that corresponds to the overlapping zone residence time of the mobile station. When either the gateway handover method or the base station controller path extension handover method is selected for use, the handover method selects a handover path of which load on the system is minimum among the handover paths that can be employed by the selected handover method.
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Citations
10 Claims
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1. A handover control method for use in a mobile communication system, the method comprising the steps of:
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changing a handover method according to an overlapping zone residence time of a mobile station;
the step of changing a handover method comprising the sub-steps of, ranking the handover methods for the mobile station including a gateway handover method, a base station controller path extension handover method, and a radio link path extension handover method in association with how long the overlapping zone residence time of the mobile station is; and
selecting one of the handover methods for the mobile station among the three methods, which method corresponds to the overlapping zone residence time of the mobile station. - View Dependent Claims (2, 3, 4)
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5. A mobile communication system comprising base stations that can communicate with mobile stations, a communication network including a plurality of nodes, and a handover control apparatus, wherein,
the mobile station comprises: -
a part for indicating a movement characteristic of the mobile station and a handover request to the handover control apparatus, the handover control apparatus comprises;
a part for holding movement characteristics of the mobile stations;
a part for determining a handover method on the basis of the movement characteristic of a mobile station upon receiving a handover request from the mobile station;
a part for determining a handover path of which load on the system is minimum among the handover paths that can be employed by the determined handover method; and
a part for controlling the nodes and the base stations such that the mobile station are connected with the base station and the nodes using the determined handover path. - View Dependent Claims (6, 7)
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8. A handover control apparatus provided in a communication network including a plurality of nodes and base stations that can communicate with mobile stations, the apparatus comprising:
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a part for holding movement characteristics reported from the mobile stations;
a part for determining a handover method on the basis of the movement characteristic of a mobile station upon receiving a handover request from the mobile station;
a part for determining a handover path of which load on the network is minimum among the handover paths that can be employed by the determined handover method; and
a part for controlling the nodes and the base stations such that the mobile station is connected with the base station and the nodes using the determined handover path. - View Dependent Claims (9, 10)
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Specification