Calibration of signal strength measurements in a cellular communications system
First Claim
1. A method of calibrating signal strength measurements in cellular communications, comprising:
- repeatedly making signal strength measurements of first and second frequencies in at least one cell of a plurality of cells;
creating a plurality of measurement histories for said first and second frequencies in said at least one cell of said plurality of cells, each one of said plurality of measurement histories based on the signal strength measurements of one of said first and second frequencies in said at least one cell of said plurality of cells;
storing said plurality of measurement histories;
determining a respective correction factor for each possible pair of first and second frequencies in said at least one of said plurality of cells, each correction factor based on the stored measurement history of the respective first and second frequencies in the pair; and
applying the respective correction factor of a pair of first and second frequencies when comparing the signal strength measurements of said first and second frequencies in said pair.
3 Assignments
0 Petitions
Accused Products
Abstract
Signal strength measurements for different frequencies in different cells are calibrated in a cellular communications system. The signal strength of first and second frequencies in at least one cell of a plurality of cells is repeatedly measured. A measurement history is created for said first and second frequencies in at least the one cell. Each measurement history is based on the signal strength measurements of one of the first and second frequencies in the respective one cell. The measurement histories are stored. A respective correction factor is determined for each possible pair of first and second frequencies in at least the one cell. Each correction factor is based on the stored measurement history of the first and second frequencies in the pair. The respective correction factor for a pair of first and second frequencies cell is applied when comparing the signal strength measurements of the first and second frequencies in said pair.
-
Citations
49 Claims
-
1. A method of calibrating signal strength measurements in cellular communications, comprising:
-
repeatedly making signal strength measurements of first and second frequencies in at least one cell of a plurality of cells;
creating a plurality of measurement histories for said first and second frequencies in said at least one cell of said plurality of cells, each one of said plurality of measurement histories based on the signal strength measurements of one of said first and second frequencies in said at least one cell of said plurality of cells;
storing said plurality of measurement histories;
determining a respective correction factor for each possible pair of first and second frequencies in said at least one of said plurality of cells, each correction factor based on the stored measurement history of the respective first and second frequencies in the pair; and
applying the respective correction factor of a pair of first and second frequencies when comparing the signal strength measurements of said first and second frequencies in said pair. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 19, 20, 21, 22, 23, 24, 25, 26, 28, 30, 31, 32, 33, 34, 35, 36, 37, 40, 42, 43, 44, 45, 46, 47, 48, 49)
-
-
15. A network element for use in a cellular communications system, said network element performing a method of calibrating signal strength measurements from a plurality of cells, said method comprising:
-
receiving signal strength measurements of first and second frequencies in at least one cell of a plurality of cells;
creating a plurality of measurement histories for said first and second frequencies in said at least one cell of said plurality of cells, each one of said plurality of measurement histories based on the signal strength measurements of one of said first and second frequencies in said at least one cell of said plurality of cells;
storing said plurality of measurement histories;
determining a respective correction factor for each possible pair of first and second frequencies in said at least one of said plurality of cells, each correction factor based on the stored measurement history of the respective first and second frequencies in the pair; and
applying the respective correction factor of a pair of first and second frequencies when comparing the signal strength measurements of said first and second frequencies in said pair. - View Dependent Claims (17, 18)
-
-
27. A mobile terminal for use in a cellular communications system, said mobile terminal calibrating signal strength measurements, said calibration method comprising:
-
making repeated signal strength measurements of a plurality of first frequencies and a plurality of second frequencies;
providing information relating to said signal strength measurements to a base station;
receiving respective correction factors from a base station for each possible pair of first and second frequencies, each respective correction factor based on said information relating to said signal strength measurements provided to said base station; and
applying the respective correction factor received for a pair of first and second frequencies when comparing the signal strength measurements of said first and second frequencies. - View Dependent Claims (29)
-
-
38. A cellular communications network, said network performing a method of calibrating signal strength measurements from at least one cell of a plurality of cells, said network comprising:
-
at least one mobile terminal, said at least one mobile terminal making repeated signal strength measurements of a plurality of first frequencies and a plurality of second frequencies; and
a base station in said at least one cell, said base station receiving information relating to said signal strength measurements from said at least one mobile terminal, wherein said network performs a calibration method comprising;
creating a plurality of measurement histories for said first and second frequencies in said at least one cell of said plurality of cells, each one of said plurality of measurement histories based on the signal strength measurements of one of said first and second frequencies in said at least one cell of said plurality of cells;
storing said plurality of measurement histories;
determining a respective correction factor for each possible pair of first and second frequencies in said at least one of said plurality of cells, each correction factor based on the stored measurement history of the respective first and second frequencies in the pair; and
applying the respective correction factor of a pair of first and second frequencies when comparing the signal strength measurements of said first and second frequencies. - View Dependent Claims (41)
-
Specification