Criteria for base station selection, including handover, in a wireless communication system
First Claim
1. A method for selecting a base station comprising:
- receiving transmissions from a plurality of base stations;
deriving indications of received signal strength for each of the transmissions;
deriving from the transmissions load information associated with each of the plurality of base stations; and
selecting one of the plurality of base stations as a current base station based on the indications of received signal strength and the load information.
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Accused Products
Abstract
The present invention provides method and apparatus for facilitating base station selection/handover by a user terminal in a distributed (e.g., cellular-type) wireless communication system. In accordance with one aspect, hysteresis is adaptively determined as a function of the variance of receive signal strength fluctuations. In turn, an adaptive hysteresis factor can be obtained and used for a subsequent handover decision, for example, based on a cost function that takes into account the hysteresis. In accordance with another aspect, base station selection depends on a number of criteria, such as received signal strength, base station load, and estimated distance between a receiving user terminal and one or more base stations.
94 Citations
20 Claims
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1. A method for selecting a base station comprising:
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receiving transmissions from a plurality of base stations;
deriving indications of received signal strength for each of the transmissions;
deriving from the transmissions load information associated with each of the plurality of base stations; and
selecting one of the plurality of base stations as a current base station based on the indications of received signal strength and the load information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A machine-readable medium having stored thereon a set of machine-executable instructions that, when executed by a data-processing system, cause the system to perform a method for selecting a base station comprising:
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receiving transmissions from a plurality of base stations;
deriving indications of received signal strength for each of the transmissions;
deriving from the transmissions load information associated with each of the plurality of base stations; and
selecting one of the plurality of base stations as a current base station based on the indications of received signal strength and the load information. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification