Method and Apparatus for Dynamically Creating and Updating Base Station Neighbor Lists
First Claim
1. A method for creating a base station neighbor list for a target base station in a network comprising a plurality of base stations, comprising:
- obtaining signal strength measurement information associated with a set of candidate base stations;
creating the base station neighbor list by selecting ones of the candidate base stations for inclusion in the base station neighbor list in a manner for substantially maximizing a number of locations in the coverage area of the target base station receiving signal coverage from at least a threshold number of selected ones of the candidate base stations; and
storing the base station neighbor list.
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Abstract
The invention includes a method and apparatus for creating a base station neighbor list for a target base station in a network comprising a plurality of base stations. A method includes obtaining signal strength measurement information associated with a set of candidate base stations, creating the base station neighbor list by selecting ones of the candidate base stations for inclusion in the base station neighbor list in a manner for substantially maximizing a number of locations in the coverage area of the target base station receiving signal coverage from at least a threshold number of selected ones of the candidate base stations, and storing the base station neighbor list. The base station neighbor list may be updated periodically, or in response to changes to signal strength measurement information. The base station neighbor list is distributed from the base station to wireless user devices served by the base station for use by the wireless user devices in making handoff decisions.
102 Citations
21 Claims
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1. A method for creating a base station neighbor list for a target base station in a network comprising a plurality of base stations, comprising:
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obtaining signal strength measurement information associated with a set of candidate base stations; creating the base station neighbor list by selecting ones of the candidate base stations for inclusion in the base station neighbor list in a manner for substantially maximizing a number of locations in the coverage area of the target base station receiving signal coverage from at least a threshold number of selected ones of the candidate base stations; and storing the base station neighbor list. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for creating a base station neighbor list for a target base station in a network comprising a plurality of base stations, comprising:
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means for obtaining signal strength measurement information associated with a set of candidate base stations; means for creating the base station neighbor list by selecting ones of the candidate base stations for inclusion in the base station neighbor list in a manner for substantially maximizing a number of locations in the coverage area of the target base station receiving signal coverage from at least a threshold number of selected ones of the candidate base stations; and means for storing the base station neighbor list. - View Dependent Claims (12, 13)
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14. A method for creating a base station neighbor list for a target base station using pilot signal strength measurements obtained from wireless user devices served by the target base station, comprising:
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receiving, from the wireless user devices, a first set of pilot signal strength measurements associated with ones of the base stations included in a first base station neighbor list; receiving, from the wireless user devices, a second set of pilot signal strength measurements associated with ones of the base stations included in a second base station neighbor list, wherein the second base station neighbor list is different than the first base station neighbor list; and creating a final base station neighbor list using the first and second sets of pilot signal strength measurements, wherein the final base station neighbor list includes selected ones of the plurality of base stations. - View Dependent Claims (15, 16, 17, 18)
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19. An apparatus for creating a base station neighbor list for a target base station using pilot signal strength measurements obtained from wireless user devices served by the target base station, comprising:
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means for receiving, from the wireless user devices, a first set of pilot signal strength measurements associated with ones of the base stations included in a first base station neighbor list; means for receiving, from the wireless user devices, a second set of pilot signal strength measurements associated with ones of the base stations included in a second base station neighbor list, wherein the second base station neighbor list is different than the first base station neighbor list; and means for creating a final base station neighbor list using the first and second sets of pilot signal strength measurements, wherein the final base station neighbor list includes selected ones of the plurality of base stations. - View Dependent Claims (20)
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21. A method for updating a base station neighbor list of a target base station, comprising:
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detecting a base station in the vicinity of the target base station; determining whether or not the base station neighbor list of the target base station is full; if the base station neighbor list of the target base station is not full, adding the new base station to the base station neighbor list of the target base station; and if the base station neighbor list of the target base station is full, replacing the lowest-priority base station on the base station neighbor list with the new base station in response to a determination that the new base station is preferred over the lowest-priority base station.
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Specification