Mobile equipment based filtering for packet radio service
View Patent ↗A method for operating a mobile equipment (ME 10 ) in a wireless network ( 12 ) includes determining a parameter that is indicative of a signal quality experienced by the ME, such as by determining a speed of the ME; calculating in the ME an indication of link quality, the calculation employing a filtering operation having a filter length that is a function of the determined parameter, such as speed or derivative of the speed of the ME; and reporting the calculated indication of link quality to the wireless network. The step of determining includes steps of (a) deriving an indication of ME speed in the wireless network; and (b) transmitting the speed indication to the ME using a point-to-point message.
1. A method comprising:
calculating a default forgetting factor based on a parameter received in a broadcast message;
wirelessly receiving, at a mobile equipment and from a network, an indication of signal quality experienced by the mobile equipment;
modifying the default forgetting factor to set a finite length of a filter as a function of the received indication of signal quality;
filtering a sequence of link quality measurement data using the finite length filter; and
transmitting an indication of the filtered link quality measurement data to the network.
2. The method of claim 1 , wherein the indication of signal quality comprises an indication of the mobile equipment's speed.
3. The method of claim 1 , wherein the indication of a signal quality is received in a point-to-point message.
4. The method of claim 1 , wherein the sequence of link quality measurement data comprises bit error probability.
5. The method of claim 1 , wherein the indication of the filtered link quality measurement data comprises mean bit error probability.
6. The method of claim 1 , wherein the indication of the filtered link quality measurement data comprises coefficient of variation of bit error probability.
7. A mobile equipment comprising:
a receiver adapted to wirelessly receive from a network an indication of signal quality experienced by the mobile equipment and to receive from the network a broadcast message that includes a parameter;
a processor adapted to calculate a default forgetting factor based on the parameter received in the broadcast message and to modify the default forgetting factor to implement a filter for filtering a sequence of link quality measurement data, said filter having a finite filter length that is a function of said received indication of signal quality; and
a transmitter, coupled to the processor, adapted to transmit an indication of the filtered link quality measurement data to the network.
8. The mobile equipment of claim 7 , wherein the indication of signal quality comprises an indication of the particularmobile equipment's speed.
9. The mobile equipment of claim 7 , wherein the indication of a signal quality is received in a point-to-point message.
10. The mobile equipment of claim 7 , wherein the sequence of link quality measurement data comprises bit error probability.
11. The mobile equipment of claim 7 , wherein the indication of the filtered link quality measurement data comprises mean bit error probability.
12. The mobile equipment of claim 7 , wherein the indication of the filtered link quality measurement data comprises coefficient of variation of bit error probability.
13. A computer readable medium encoded with a computer program and executable by a controller of a mobile equipment for executing measurement data filtering operations, the operations comprising:
calculating a default forgetting factor based on a parameter received in a broadcast message;
modifying the default forgetting factor to set a finite length of a filter as a function of an indication of signal quality experienced by the mobile equipment, said indication of signal quality received in a wireless message;
filtering a sequence of link quality measurement data using the finite length filter; and
transmitting an indication of the filtered link quality measurement data to the network.
14. The computer program of claim 13 , wherein the indication of signal quality comprises an indication of the mobile equipment's speed.
15. The computer program of claim 13 , wherein the indication of the filtered link quality measurement data comprises mean bit error probability.
16. The computer program of claim 13 , wherein the indication of the filtered link quality measurement data comprises coefficient of variation of bit error probability.
17. An apparatus comprising:
receiving means for wirelessly receiving from a network an indication of signal quality experienced by the mobile equipment and a broadcast message that includes a parameter;
processing means for calculating a default forgetting factor based on the parameter received in the broadcast message and for modifying the default forgetting factor to implement a filter for filtering a sequence of link quality measurement data, said filter having a finite filter length that is a function of said received indication of signal quality; and
transmit means for transmitting an indication of the filtered link quality measurement data to the network.