Optimizing hand-off neighbor lists for improved system performance
First Claim
1. A method for creating a neighbor list for use in hand-offs in a cellular communications system comprising:
- determining a requested base station, a-reference base station, and a list of other base stations from a saved call;
determining if the requested base station is present in a neighbor list of a base stations listed in the list of other base stations; and
adding the requested base station to a neighbor list for an optimal base station if the requested base station is absent from neighbor lists of the reference base station and all base stations listed in the list of other base stations.
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Accused Products
Abstract
Method for improving hand-off performance in a code-division multiple access (CDMA) cellular telephone system. A preferred embodiment comprises the analysis of saved hand-off information to minimize the size of neighbor lists for each base station in the cellular telephone system. If a requested base station (for example, base station 618) is listed in any neighbor list of any base station (for example, base stations 605, 617, and 620) involved in the hand-off, then the requested base station is not added to any neighbor list. If the requested base station is not the neighbor lists of any of the base stations involved in the hand-off, then it is added to an initial base station'"'"'s neighbor list (base station 605).
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Citations
22 Claims
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1. A method for creating a neighbor list for use in hand-offs in a cellular communications system comprising:
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determining a requested base station, a-reference base station, and a list of other base stations from a saved call;
determining if the requested base station is present in a neighbor list of a base stations listed in the list of other base stations; and
adding the requested base station to a neighbor list for an optimal base station if the requested base station is absent from neighbor lists of the reference base station and all base stations listed in the list of other base stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for optimizing a neighbor list comprising:
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selecting a saved call from a list of saved calls;
determining a requested base station, a reference base station, and a list of other base stations from the saved call;
determining if the requested base station is present in a neighbor list of a base stations listed in the list of other base stations;
adding the requested base station to a neighbor list for an optimal base station if the requested base station is absent from neighbor lists of the reference base station and all base stations listed in the list of other base stations; and
repeating for all remaining saved calls in the list of saved calls. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for populating a neighbor list comprising:
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determining a requested base station, a reference base station, and a list of other base stations from call data;
searching each base station'"'"'s neighbor list for an occurrence of the requested base station, wherein each base station is from the list of other base stations;
searching the reference base station'"'"'s neighbor list for an occurrence of the requested base station; and
adding the requested base station to an optimal base station'"'"'s neighbor list if all searches are negative. - View Dependent Claims (20, 21, 22)
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Specification