MOBILE COMMUNICATION SYSTEM, MOBILE STATION AND DIVERSITY HANDOVER BRANCH CONTROL METHOD
1 Assignment
0 Petitions
Accused Products
Abstract
A branch candidate selecting method by a mobile station and a diversity handover control method on a network side in DHO performance are provided which consider a maximum cable branch number and maximum radio branch number of the mobile station, when the mobile station detects the plurality of addition branch candidates and deletion branch candidates. The mobile station inserts a plurality of addition branch candidates and deletion branch candidates, that is, all the DHO candidates into one handover trigger signal, and notifies the network. The addition branch candidates are put into addition information parameters in the handover trigger signal, and the deletion branch candidates are put into deletion information parameters. To simplify processing on the network side, the network side separates the addition branch candidates from the deletion branch candidates, and carries out sequential processing of them independently.
61 Citations
23 Claims
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1-6. -6. (canceled)
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7. A handover method for controlling a communication between a mobile station and at least one base station, in a wireless communication system including the mobile station and a plurality of base stations, said method comprising:
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an act of measuring qualities of signals transmitted from at least some of said plurality of base stations, the measured qualities of signals including a measured quality of a signal received from a certain base station;
an act of identifying the base station as an addition candidate based on the measured quality of the signal received from the certain base station exceeding an addition threshold;
after the act of identifying the base station as an addition candidate, an act of detecting that the measured quality of the signal received from the addition candidate has further exceeded an active threshold which is greater than the addition threshold, wherein the active threshold is determined in accordance with a quality of a signal transmitted from one or more active base stations;
in response to the act of detecting, an act of notifying one or more of the plurality of base stations of information about the addition candidate; and
an act of performing a handover process based on the information in the notification;
wherein the notification includes the measured quality. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A candidate base station notification method using in a handover controlling a communication between a mobile station and at least one base station, in a wireless communication system including the mobile station and a plurality of base stations, said method comprising:
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an act of comparing an active threshold with a quality of a signal transmitted from a base station that is an addition candidate, said active threshold being greater than an addition threshold used to categorize the base station as the addition candidate, the active threshold being determined in accordance with a quality of a signal transmitted from one or more active base stations; and
in response to the act of comparing, an act of notifying at least one of the one or more active base stations of information about the addition candidate whose signal quality is greater than the active threshold in accordance with a result of the act of comparing;
wherein said act of notifying transmits information including the quality of the signal transmitted from the addition candidate. - View Dependent Claims (15)
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16. A handover method for controlling a communication between a mobile station and at least one base station, in a wireless communication system including the mobile station and a plurality of base stations, said method comprising:
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an act of measuring qualities of signals transmitted from at least some of said plurality of base stations, the measured qualities of signals including a measured quality of a signal received from a certain base station;
an act of detecting that the measured quality of the signal received from the certain base station has dropped below a deletion threshold, wherein the deletion threshold is determined in accordance with a quality of a signal transmitted from one or more active base stations;
in response to the act of detecting, an act of notifying one or more of the plurality of based stations of information about the detected base station; and
an act of performing a handover process based on the information in the notification;
wherein the notification includes the measured quality. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A candidate base station notification method using in a handover controlling a communication between a mobile station and at least one base station, in a wireless communication system including the mobile station and a plurality of base stations, said method comprising:
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an act of comparing a deletion threshold with a quality of a signal transmitted from a base station, said deletion threshold being determined in accordance with a quality of a signal transmitted from one or more active base stations; and
in response to the act of comparing, an act of notifying at least one of the one or more active base stations of information about the deletion candidate whose signal quality is less than the deletion threshold in accordance with a result of the act of comparing;
wherein said act of notifying transmits information including the quality of the signal transmitted from the deletion candidate. - View Dependent Claims (23)
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Specification