Method for determining when a communication device should rate shift or roam in a wireless environment
First Claim
1. A method of improving communication performance in a wireless communication system, said wireless communication system having at least one mobile wireless communication device and a plurality of transmitter/receiver sites that communicate with communication signals, each of which has a geographic area, defined as a cell, within which said at least one mobile wireless communication device can communicate with at least one of said transmitter/receiver sites, said method of improving communication performance comprising the steps off:
- receiving at one of the transmitter/receiver sites the communication signals transmitted by the communication device;
evaluating over time intervals the quality of the communication signals received from the mobile wireless communication device to obtain measurement values of the quality of the evaluated communication signals;
creating a functional relationship value based on the measurement values and a configurable parameter associated with the measurement values;
storing the functional relationship value in a memory;
calculating an extrapolated functional relationship value based on a stored functional relationship value; and
determining an optimal one of said plurality of transmitter/receiver sites for communication with said wireless communication device based on the extrapolated functional relationship value.
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Abstract
Methods for improving communication performance in a wireless communication system where the wireless communication system has at least one mobile wireless communication device and a plurality of transmitter/receiver sites. The transmitter/receiver sites have a geographic area, defined as a cell, within which the mobile wireless wireless communication devices can communicate with at least one of the transmitter/receiver sites. The methods determine when the mobile wireless communication device should rate shift or roam based on connection quality measurement data or position information such as GPS.
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Citations
16 Claims
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1. A method of improving communication performance in a wireless communication system, said wireless communication system having at least one mobile wireless communication device and a plurality of transmitter/receiver sites that communicate with communication signals, each of which has a geographic area, defined as a cell, within which said at least one mobile wireless communication device can communicate with at least one of said transmitter/receiver sites, said method of improving communication performance comprising the steps off:
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receiving at one of the transmitter/receiver sites the communication signals transmitted by the communication device;
evaluating over time intervals the quality of the communication signals received from the mobile wireless communication device to obtain measurement values of the quality of the evaluated communication signals;
creating a functional relationship value based on the measurement values and a configurable parameter associated with the measurement values;
storing the functional relationship value in a memory;
calculating an extrapolated functional relationship value based on a stored functional relationship value; and
determining an optimal one of said plurality of transmitter/receiver sites for communication with said wireless communication device based on the extrapolated functional relationship value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
determining whether to use the measurement values;
applying a weighting factor associated with the measurement values; and
applying a threshold factor associated with the measurement values.
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9. A method of improving communication performance in a wireless communication system, said wireless communication system having at least one mobile wireless communication device and a plurality of transmitter/receiver sites that communicate with communication signals, each of which has a geographic area, defined as a cell, within which said at least one mobile wireless communication device can communicate with at least one of said transmitter/receiver sites, said method of improving communication performance comprising the steps of:
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receiving at one of the transmitter/receiver sites the communication signals transmitted by the communication device;
evaluating over time intervals the quality of the communication signals received from the mobile wireless communication device to obtain measurement values of the quality of the evaluated communication signals;
detecting one of a transmission failure and reception failure of the communication signals;
storing the last measurement value evaluated before the detected one of a transmission failure and a reception failure;
calculating a function based on current values of the measurement values and the stored last measurement value; and
determining whether to make a change in the transmission of the communication signals based at least in part on the function. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification