Preliminary performance of handover function in telecommunications system
First Claim
1. For use in a telecommunications system having a source base station and a destination base station where a specified mobile station establishes a connection with the source base station, a method comprising:
- initiating at the destination base station a preliminary portion of a handover sequence for the specified mobile station, the preliminary portion of the handover sequence including uplink radio synchronization with respect to the specified mobile station; and
then subsequently initiating at the destination base station another portion of a handover sequence for the specified mobile station.
1 Assignment
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Accused Products
Abstract
A telecommunications system has a source base station (BSS) and a destination base station (BSD), and a handover unit (100) having a dynamic offset threshold determination unit (102) which establishes a dynamic offset threshold for starting soft handover. When the dynamic offset threshold for soft handover is exceeded, a preliminary portion of a handover sequence is initiated at the destination base station. The preliminary portion of the handover sequence is initiated so that time-critical handover sequence activities (such as L1 uplink synchronization) are well underway, if not completed, by the time the soft handover is actually needed.
66 Citations
17 Claims
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1. For use in a telecommunications system having a source base station and a destination base station where a specified mobile station establishes a connection with the source base station, a method comprising:
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initiating at the destination base station a preliminary portion of a handover sequence for the specified mobile station, the preliminary portion of the handover sequence including uplink radio synchronization with respect to the specified mobile station; and
then subsequentlyinitiating at the destination base station another portion of a handover sequence for the specified mobile station. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. For use in a telecommunications system having a source base station and a destination base station where a specified mobile station establishes a connection with the source base station, a method comprising:
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initiating at the destination base station a preliminary portion of a handover sequence for the specified mobile station; and
then subsequentlyinitiating at the destination base station another portion of a handover sequence for the specified mobile station;
the preliminary portion of the handover sequence involving an operation between the destination base station and the specified mobile station that are more time critical than operations performed during the another portion of the handover sequence.
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9. A telecommunications system comprising a control node and a destination base station, characterized in that:
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the control node initiates at the destination base station a preliminary portion of a handover sequence for the specified mobile station, and then subsequently initiates at the destination base station another portion of the handover sequence for the specified mobile station;
the destination base station, in performing the preliminary portion of the handover sequence, performs uplink radio synchronization with respect to the specified mobile station.
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10. A telecommunications system comprising a control node and a destination base station, characterized in that:
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the control node initiates at the destination base station a preliminary portion of a handover sequence for the specified mobile station, and then subsequently initiates at the destination base station another portion of the handover sequence for the specified mobile station;
the destination base station, in performing the preliminary portion of the handover sequence, performs operations which are more time critical than operations included in the another portion of the handover sequence. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification