ESTIMATING LINK QUALITIES IN MULTI-CARRIER SYSTEMS
First Claim
1. A method for estimating qualities of links between a transmitter and a receiver on respective carrier frequencies in a multi-carrier wireless communication system from measurements made during a scanning interval in which pilot signals may be transmitted from the transmitter to the receiver in a plurality of carrier-time bins, each carrier-time bin corresponding to a respective carrier frequency of the multi-carrier system and a respective time slot within the scanning interval, the method comprising:
- during the scanning interval, making test measurements in less than all of the carrier-time bins, each test measurement comprising transmitting a respective signal from the transmitter to the receiver in a respective carrier time bin and measuring a strength of the corresponding signal received by the receiver; and
using the test measurements to determine at least one of;
a value indicative of a predicted quality of a link between the transmitter and the receiver in a carrier-time bin of the scanning interval in which no test measurement is made during the scanning interval; and
a value indicative of a predicted quality of a link between the transmitter and the receiver over a period of time within or equal to the scanning interval on a carrier frequency for which no test measurement is made in at least one carrier-time bin during said period of time.
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0 Petitions
Accused Products
Abstract
A method for estimating qualities of links between a transmitter and a receiver on respective carrier frequencies in a multi-carrier wireless communication system from measurements made during a scanning interval in which pilot signals may be transmitted from the transmitter to the receiver in a plurality of carrier-time bins, each carrier-time bin corresponding to a respective carrier frequency of the multi-carrier system and a respective time slot within the scanning interval, are provided. The method includes, during the scanning interval, making test measurements in less than all of the carrier-time bins, each test measurement comprising transmitting a respective signal from the transmitter to the receiver in a respective carrier-time bin and measuring a strength of the corresponding signal received by the receiver, and using the test measurements to determine at least one of: a value indicative of a predicted quality of a link between the transmitter and the receiver in a carrier-time bin of the scanning interval in which no test measurement is made during the scanning interval, and a value indicative of a predicted quality of a link between the transmitter and the receiver over a period of time within or equal to the scanning interval on a carrier frequency for which no test measurement is made in at least one carrier-time bin during said period of time.
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Citations
31 Claims
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1. A method for estimating qualities of links between a transmitter and a receiver on respective carrier frequencies in a multi-carrier wireless communication system from measurements made during a scanning interval in which pilot signals may be transmitted from the transmitter to the receiver in a plurality of carrier-time bins, each carrier-time bin corresponding to a respective carrier frequency of the multi-carrier system and a respective time slot within the scanning interval, the method comprising:
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during the scanning interval, making test measurements in less than all of the carrier-time bins, each test measurement comprising transmitting a respective signal from the transmitter to the receiver in a respective carrier time bin and measuring a strength of the corresponding signal received by the receiver; and using the test measurements to determine at least one of; a value indicative of a predicted quality of a link between the transmitter and the receiver in a carrier-time bin of the scanning interval in which no test measurement is made during the scanning interval; and a value indicative of a predicted quality of a link between the transmitter and the receiver over a period of time within or equal to the scanning interval on a carrier frequency for which no test measurement is made in at least one carrier-time bin during said period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of determining a value of a parameter indicative of a rate of variation of a received signal strength with time at a mobile receiver, traveling at a speed v(t), as a result of time-dependent fading between a transmitter and the mobile receiver, the method comprising:
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measuring a first speed v0 of the mobile receiver at a first time to; performing a plurality of measurements of received signal strength at the mobile receiver versus time in a first time period following said first time; determining from the first plurality of measurements a first value of a parameter indicative of a first rate of said variation of received signal strength with time; measuring a speed vn of the mobile receiver at a later time tn; and determining a second value of said parameter, indicative of a second rate of said variation corresponding to speed vn, from the first said value and the first and second speeds. - View Dependent Claims (28, 29, 30)
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31. A computer readable medium having stored thereon instructions arranged, when executed, to implement a method for estimating qualities of links between transmitter and receiver on respective carrier frequencies in a multi-carrier wireless communication system from measurements made during a scanning interval in which pilot signals may be transmitted from the transmitter to the receiver in a plurality of carrier-time bins, each carrier-time bin corresponding to a respective carrier frequency of the multi-carrier system and a respective time slot within the scanning interval, the method comprising:
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during the scanning interval, making test measurements in less than all of the carrier-time bins, each test measurement comprising transmitting a respective signal from the transmitter to the receiver in a respective carrier time bin and measuring a strength of the corresponding signal received by the receiver; and using the test measurements to determine at least one of; a value indicative of a predicted quality of a link between the transmitter and the receiver in a carrier-time bin of the scanning interval in which no test measurement is made during the scanning interval; and a value indicative of a predicted quality of a link between the transmitter and the receiver over a period of time within or equal to the scanning interval on a carrier frequency for which no test measurement is made in at least one carrier-time bin during said period of time.
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Specification