Mobile equipment based filtering for packet radio service (PRS)

DC CAFC

US 7,599,664 B2
Filed: 03/26/2008
Issued: 10/06/2009
Est. Priority Date: 12/09/1999
Status: Expired due to Fees

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1. A method comprising:

receiving an indication of signal quality experienced by a particular mobile equipment;

setting 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 from the particular mobile equipment an indication of the filtered link quality measurement data.

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Abstract

A method for operating a mobile equipment (ME 10) in a wireless network (12) includes receiving from a wireless network 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 wireless network derives an indication of ME speed and transmits the speed indication to the ME using a point-to-point message.

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28 Claims

1. A method comprising:
- receiving an indication of signal quality experienced by a particular mobile equipment;
  
  setting 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 from the particular mobile equipment an indication of the filtered link quality measurement data.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- - 2. The method of claim 1, wherein the indication of signal quality comprises an indication of the particular 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 setting the finite length of the filter comprises setting a forgetting factor.
  - 5. The method of claim 4, further comprising:
    - calculating a default forgetting factor based on a parameter received in a broadcast message;
      
      and wherein setting the finite length of the filter comprises modifying the default forgetting factor.
  - 6. The method of claim 1, wherein the sequence of link quality measurement data comprises bit error probability.
  - 7. The method of claim 1, wherein the indication of the filtered link quality measurement data comprises mean bit error probability.
  - 8. The method of claim 1, wherein the indication of the filtered link quality measurement data comprises coefficient of variation of bit error probability.
  - 9. The method of claim 1, executed by the particular mobile equipment.
  - 10. The method of claim 9, wherein the filter is disposed in the particular mobile equipment.
  - 11. The method of claim 10, further comprising calculating in the particular mobile equipment a default factor;
    - and wherein setting the finite length of the filter comprises modifying the default factor.
  - 12. The method of claim 11, wherein the default factor comprises a default forgetting factor that is calculated based on a parameter received from a network.
  - 13. The method of claim 12, wherein the parameter is received from the network in a broadcast message.

14. An apparatus comprising:
- a receiver configured to receive an indication of signal quality experienced by a particular mobile equipment;
  
  a processor configured 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 the received indication of signal quality; and
  
  a transmitter, coupled to the processor, configured to transmit an indication of the filtered link quality measurement data.
- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- - 15. The apparatus of claim 14, wherein the apparatus comprises the particular mobile equipment and the indication of signal quality comprises an indication of the particular mobile equipment'"'"'s speed.
  - 16. The apparatus of claim 14, wherein the indication of a signal quality is received in a point-to-point message.
  - 17. The apparatus of claim 14, wherein the finite length comprises a forgetting factor.
  - 18. The apparatus of claim 17, wherein:
    - the receiver is further configured to receive from the network a broadcast message that includes a parameter;
      
      and the processor is further configured to calculate a default forgetting factor based on the parameter received in the broadcast message;
      
      and wherein the processor is configured to implement the filter by modifying the default forgetting factor.
  - 19. The apparatus of claim 14, wherein the sequence of link quality measurement data comprises bit error probability.
  - 20. The apparatus of claim 14, wherein the indication of the filtered link quality measurement data comprises mean bit error probability.
  - 21. The apparatus of claim 14, wherein the indication of the filtered link quality measurement data comprises coefficient of variation of bit error probability.
  - 22. The apparatus of claim 14, wherein the apparatus comprises the particular mobile equipment.
  - 23. The apparatus of claim 22, wherein the filter is disposed in the particular mobile equipment.
  - 24. The apparatus of claim 23, wherein the processor is configured to calculate a default factor, and is configured to implement the filter by modifying the default factor.
  - 25. The apparatus of claim 24, wherein the default factor comprises a default forgetting factor and the processor is configured to calculate the default forgetting factor based on a parameter received from a network.
  - 26. The apparatus of claim 25, wherein the parameter is received from the network in a broadcast message.

27. An apparatus comprising:
- receiving means for receiving an indication of signal quality experienced by a particular mobile equipment;
  
  processing means for implementing 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.
- View Dependent Claims (28)
- - 28. The apparatus of claim 27 wherein the finite length of the filter is a function of a forgetting factor that is influenced by the received indication of signal quality.

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Current Assignee
Conversant Wireless Licensing S.à.r.l. (f/k/a Core Wireless Licensing S.a.r.l.) (MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management))
Original Assignee
Nokia Corporation
Inventors
Nikula, Eero, Zhao, Yuping, Sebire, Guillaume
Primary Examiner(s)
Nguyen, David Q

Application Number

US12/079,317
Publication Number

US 20080207134A1
Time in Patent Office

559 Days
Field of Search

455/67.11, 455/515, 455/441, 455/456, 455/65
US Class Current

455/67.11
CPC Class Codes

H04L 1/0026 Transmission of channel qua...

H04L 1/20 using signal quality detector

Mobile equipment based filtering for packet radio service (PRS)

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28 Claims

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Mobile equipment based filtering for packet radio service (PRS)

First Claim

11 Assignments

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Abstract

23 Citations

28 Claims

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