Handover control method, mobile station and communication control apparatus
First Claim
1. A handover control method used in a mobile communication system which includes communication apparatuses having functions of base stations, a mobile station and a communication control apparatus which controls connections between said communication apparatuses and said mobile station, said handover control method comprising the steps of:
- said mobile station switching a communication apparatus of a communication partner to another communication apparatus when a communication quality value between said communication apparatus of said communication partner and said mobile station falls below a first threshold which is better than a limitation value by which communication is available;
wherein said communication control apparatus selects at least a handover destination candidate communication apparatus from among communication apparatuses surrounding said communication apparatus of said communication partner when said communication quality value falls below a second threshold which is better than said first threshold; and
said communication control apparatus keeps wireless resources of said at least a handover destination candidate communication apparatus which is selected.
1 Assignment
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Accused Products
Abstract
When a handover standby threshold falls below a received power of perch channel from a base station 150-1 of a communication partner, a mobile station 110 sends a handover standby operation request to a base station control apparatus 130, and notifies of history of movement of itself and receives powers of perch channels from base stations 150-2 -150-4 surrounding the communication partner (mobile station information). The base station control apparatus 130 compares the mobile station information with history of mobile station information so that a handover destination candidate base station is selected and sent to the mobile station 110. The mobile station 110 switches the communication partner to the handover destination candidate base station when received power of the perch channel from the base station 150-1 falls below a handover threshold.
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Citations
13 Claims
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1. A handover control method used in a mobile communication system which includes communication apparatuses having functions of base stations, a mobile station and a communication control apparatus which controls connections between said communication apparatuses and said mobile station, said handover control method comprising the steps of:
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said mobile station switching a communication apparatus of a communication partner to another communication apparatus when a communication quality value between said communication apparatus of said communication partner and said mobile station falls below a first threshold which is better than a limitation value by which communication is available;
wherein said communication control apparatus selects at least a handover destination candidate communication apparatus from among communication apparatuses surrounding said communication apparatus of said communication partner when said communication quality value falls below a second threshold which is better than said first threshold; and
said communication control apparatus keeps wireless resources of said at least a handover destination candidate communication apparatus which is selected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile station in a mobile communication system which includes communication apparatuses having functions of base stations, said mobile station communicating with a communication apparatus of a communication partner, said mobile station comprising:
a handover control part for switching said communication apparatus of said communication partner to another communication apparatus when a communication quality value between said communication apparatus of said communication partner and said mobile station falls below a first threshold which is better than a limitation value by which communication is available. - View Dependent Claims (13)
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12. A communication control apparatus in a mobile communication system which includes communication apparatuses having functions of base stations, a mobile station and said communication control apparatus which controls connections between said communication apparatuses and said mobile station, said communication control apparatus comprising:
a part for allowing said mobile station to switch a communication apparatus of a communication partner to another communication apparatus when a communication quality value between said communication apparatus of said communication partner and said mobile station falls below a first threshold which is better than a limitation value by which communication is available.
Specification