Dynamic learning of neighboring wireless cells
First Claim
1. A method of learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising the steps of:
- performing activity transfers from the current base station to each of the target base stations;
measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the step of measuring comprises the step of calculating an average duration of activity time of the wireless handsets in each of the target base stations after each of the activity transfers from the current base station;
recording the measured performance of each of the target base stations; and
determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations.
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Accused Products
Abstract
Using dynamic learning techniques by a system controller to determine a subset of neighboring cell sites to which an activity transfer should be attempted. An activity transfer can be a handoff or registration. The neighboring cell sites that should be chosen for an activity transfer are specified for each cell site. The specified neighboring cell sites are determined by the dynamic learning process. In a first embodiment, the dynamic learning is accomplished by accumulating statistical data that defines the average call duration of each of the selected neighboring sites after an activity transfer to each. Advantageously, this average duration can include the total call duration for two subsequent activity transfers. In a second embodiment, the dynamic learning is accomplished by accumulating statistical data that defines the maximum transmission power from the base station to which a handset was transferred. In a third embodiment, the duration of the low power transmission level of the base station from which the handset had just been transferred is timed. If the duration is less than a predefined number, it is assumed that a null had occurred, and that fact is stored for that cell. This information is used to detect multipath fading and to prevent premature handoffs when multipath fading occurs. Subsequently, a transfer is delayed for a cell having a large average number of nulls.
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Citations
28 Claims
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1. A method of learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising the steps of:
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performing activity transfers from the current base station to each of the target base stations; measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the step of measuring comprises the step of calculating an average duration of activity time of the wireless handsets in each of the target base stations after each of the activity transfers from the current base station; recording the measured performance of each of the target base stations; and determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising the steps of:
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performing activity transfers from the current base station to each of the target base stations; measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the step of measuring comprises the step of calculating the average maximum amount of transmission power received from each of the target base stations after each of the activity transfers from the current base station to each of the target base stations; recording the measured performance of each of the target base stations; and determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations. - View Dependent Claims (8, 9, 10)
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11. A method of learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising the steps of:
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performing activity transfers from the current base station to each of the target base stations; measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the step of measuring comprises the steps of detecting an occurrence of low transmission power for less than a predefined amount of time being received from the current base station after each of the activity transfers from the current base station, and calculating an average number of detected occurrences for each of the target base stations; recording the measured performance of each of the target base stations; and determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations. - View Dependent Claims (12, 13, 14)
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15. An apparatus for learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising:
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means for performing activity transfers from the current base station to each of the target base stations; means for measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the means for measuring comprises means for calculating an average duration of activity time of the wireless handsets in each of the target base stations after each of the activity transfers from the current base station; means for recording the measured performance of each of the target base stations; and means for determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations. - View Dependent Claims (16, 17, 18, 19, 20)
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21. An apparatus for learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising:
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means for performing activity transfers from the current base station to each of the target base stations; means for measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the means for measuring comprises means for calculating the average maximum amount of transmission power received from each of the target base stations after each of the activity transfers from the current base station to each of the target base stations; means for recording the measured performance of each of the target base stations; and means for determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations. - View Dependent Claims (22, 23, 24)
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25. An apparatus for learning of target base stations to which activity transfers of wireless handsets can be made from a current base station in a wireless switching system, comprising:
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means for performing activity transfers from the current base station to each of the target base stations; means for measuring performance of each of the target base stations in maintaining the activities of the wireless handsets and the means for measuring comprises means for detecting an occurrence of low transmission power for less than a predefined amount of time being received from the current base station after each of the activity transfers from the current base station, and means for calculating an average number of detected occurrences for each of the target base stations; means for recording the measured performance of each of the target base stations; and means for determining subsequently one of the target base stations to which to do a activity transfer based on the recorded measured performance of the target base stations. - View Dependent Claims (26, 27, 28)
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Specification