Reverse link soft hand off method
AssigneeLG Information & Communications, Ltd.
InventorJong Sun Han
Life of this patent
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Abstract
Reverse link soft hand off method for improving a reverse link communication quality in a CDMA cellular communication system having a plurality of base stations, at least one mobile station, and at least one base station controller, including the step of a particular mobile station being handed off from a first channel on a serving base station to a second channel on a target base station, if a reverse link traffic signal strength or a reverse link pilot signal strength for the particular mobile station measured at a target base station exceeds a preset threshold.
Claims12
A reverse link soft hand off method in a communication system including a plurality of base stations, at least one mobile station, and at least one base station controller, the method comprising:
- a particular mobile station being independently handed off from a first channel on a serving base station to a second channel on a target base station, if a reverse link traffic signal strength or a reverse link pilot signal strength for the particular mobile station measured at the target base station exceeds a preset threshold and a forward link hand off is not established.
A soft hand off method in a communication system including a plurality of base stations, at least one mobile station, and at least one base station controller, the method comprising:
- (1) comparing a reverse link traffic signal strength or a reverse link pilot signal strength of a particular mobile station measured at a serving base station to a first threshold preset at the serving base station;
- (2) reporting the signal strength measured at the serving base station to the base station controller in a case when the signal strength is lower than the first threshold as a result of the comparison;
- (3) the base station controller instructing the base stations around the particular mobile station to measure the reverse link traffic signal strength or the reverse link pilot signal strength of the particular mobile station when the base station controller receives the report on the signal strength;
- and
- (4) the particular mobile station being independently handed off from a first channel on the serving base station to a second channel on the target base station according to a result of the signal strength measured at the base stations around the particular mobile station and a forward link hand off is not established.
A reverse link soft hand off method in a CDMA cellular communication system including a plurality of base stations, at least one base station, and at least one mobile station controller, the method comprising:
- a particular mobile station being independently handed off from a channel on a serving base station to another channel on a target base station, if a reverse link communication quality of the particular mobile station is relatively lower than a forward link communication quality of the particular mobile station and a forward link hand off is not established.
A soft hand off method in a communication system including a plurality of base stations, at least one mobile station, and at least one base station controller, the method comprising:
- (1) comparing a reverse link traffic signal strength or a reverse link pilot signal strength of a particular mobile station measured at a serving base station to a first threshold preset at the serving base station;
- (2) reporting the signal strength measured at the serving base station to the base station controller in a case when the signal strength is lower than the first threshold as a result of the comparison;
- (3) the base station controller instructing the base stations around the particular mobile station to measure the reverse link traffic signal strength or the reverse link pilot signal strength of the particular mobile station when the base station controller receives the report on the signal strength;
- and
- (4) the particular mobile station being handed off from a first channel on the serving base station to a second channel on the target base station according to a result of the signal strength measured at the base stations around the particular mobile station,
- wherein the first threshold ST1 is determined between a second threshold, which is a reverse link signal strength for adding a new communication channel between the particular mobile station and the serving base station in reverse link soft handoff, and a third threshold, which is a reverse link signal strength requiring release of an communication channel between the particular mobile station and the serving base station in reverse link soft handoff, and
- wherein a window defined as a difference between the second threshold and the third threshold is determined to be relatively smaller than a window defined as a difference between a forward link signal strength for adding a new communication channel between the particular mobile station and the serving base station at a forward link hand off for the particular mobile station, and a forward link signal strength requiring release of an communication channel between the particular mobile station and the serving base station in reverse link soft handoff.
Dependencies are inferred from the claim text.