Method for identifying a fast speed mobile station, and a base station
First Claim
Patent Images
1. A method for identifying a fast speed mobile station in a radio system, said method comprising:
- continuously measuring, at a base station, a frequency error of radio signals received from a mobile station;
calculating, at said base station, a change in said frequency error from a time interval of predetermined length;
identifying said mobile station as a fast speed mobile station if said change in said calculated frequency error exceeds a predetermined limit value; and
transmitting, from said base station, a speed report concerning said mobile station to a base station controller, only when said mobile station has been identified as a fast speed mobile station.
5 Assignments
0 Petitions
Accused Products
Abstract
A method for identifying a fast speed mobile station (MS) in a radio system, said method comprising measuring the frequency error of radio signals received from a mobile station. In order for a fast speed mobile station to be more reliably identified than before, the method comprises calculating the change (df) in BSC the frequency error from a time interval (t) of predetermined length, and identifying the mobile station as a fast speed mobile station if the change (df) in the calculated frequency error exceeds a predetermined limit value.
40 Citations
13 Claims
-
1. A method for identifying a fast speed mobile station in a radio system, said method comprising:
-
continuously measuring, at a base station, a frequency error of radio signals received from a mobile station;
calculating, at said base station, a change in said frequency error from a time interval of predetermined length;
identifying said mobile station as a fast speed mobile station if said change in said calculated frequency error exceeds a predetermined limit value; and
transmitting, from said base station, a speed report concerning said mobile station to a base station controller, only when said mobile station has been identified as a fast speed mobile station. - View Dependent Claims (2)
-
-
3. A base station of a radio system, said base station comprising:
-
a receiver arranged to receive signals transmitted by a mobile station;
means for continuously measuring a frequency error of said received signals;
a calculator unit responsive to said measuring means and arranged to calculate a change in said frequency error in a time interval of predetermined length;
a comparator responsive to said calculator unit and arranged to compare said change in said frequency error with a predetermined limit value and to identify said mobile station as a fast speed mobile station if said change in said frequency error exceeds said predetermined limit value; and
means responsive to said comparator for sending a speed report concerning said mobile station to a base station controller only when said comparator of said base station identifies said mobile station as a fast speed mobile station. - View Dependent Claims (4, 5, 6, 7, 8, 9)
-
-
10. A method for identifying a fast speed mobile station in a radio system, said method comprising:
-
defining predetermined speed classes;
continuously measuring, at a base station, a frequency error of radio signals received from a mobile station;
calculating, at said base station, a change in said frequency error from a time interval of predetermined length;
identifying said mobile station as a fast speed mobile station if said change in said calculated frequency error exceeds a predetermined limit value; and
identifying a speed class corresponding to said calculated change in said frequency error;
transmitting, from said base station, a speed report concerning said mobile station to a base station controller, only when said mobile station has been identified as a fast speed mobile station, said speed report including at least said speed class of said mobile station.
-
-
11. A base station of a radio system, said base station comprising:
-
a receiver arranged to receive signals transmitted by a mobile station;
means for continuously measuring a frequency error of said received signals;
a calculator unit responsive to said measuring means and arranged to calculate a change in said frequency error in a time interval of predetermined length;
a comparator responsive to said calculator unit and arranged to compare said change in said frequency error with a predetermined limit value and to identify said mobile station as a fast speed mobile station if said change in said frequency error exceeds said predetermined limit value;
means for identifying a predetermined speed class corresponding to said change in said frequency error; and
means responsive to said comparator for sending a speed report concerning said mobile station to a base station controller only in response to an identification of said mobile station as a fast speed mobile station.
-
-
12. A base station of a radio system, said base station comprising:
-
a receiver arranged to receive signals transmitted by a mobile station;
a measuring mechanism to continuously measure a frequency error of said received signals;
a calculator unit responsive to said measuring mechanism and arranged to calculate a change in said frequency error in a time interval of predetermined length;
a comparator responsive to said calculator unit and arranged to compare said change in said frequency error with a predetermined limit value and to identify said mobile station as a fast speed mobile station if said change in said frequency error exceeds said predetermined limit value; and
a sending mechanism, responsive to said comparator, to send a speed report concerning said mobile station to a base station controller only when said comparator of said base station identifies said mobile station as a fast speed mobile station.
-
-
13. A base station of a radio system, said base station comprising:
-
a receiver arranged to receive signals transmitted by a mobile station;
a measuring mechanism to continuously measure a frequency error of said received signals;
a calculator unit responsive to said measuring mechanism and arranged to calculate a change in said frequency error in a time interval of predetermined length;
a comparator responsive to said calculator unit and arranged to compare said change in said frequency error with a predetermined limit value and to identify said mobile station as a fast speed mobile station if said change in said frequency error exceeds said predetermined limit value;
an identifying mechanism to identify a predetermined speed class corresponding to said change in said frequency error; and
a sending mechanism responsive to said comparator to send a speed report concerning said mobile station to a base station controller only in response to an identification of said mobile station as a fast speed mobile station.
-
Specification