Managing assigned fingers in wireless telecommunication using a finger lock mechanism

• US 6,975,670 B1
• Filed: 10/02/2000
• Issued: 12/13/2005
• Est. Priority Date: 10/02/2000
• Status: Expired due to Term

• Current Assignee: ST Wireless SA, ST-Ericcson SA (Telefonaktiebolaget LM Ericsson), Texas Instruments, Inc.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Aldaz, Luis, Hsia, Daniel Jeng
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): WARE, CICELY Q
• Application Number:
  US09/678,472
• Time in Patent Office: 1,898 Days
• Field of Search: 375/150, 375/347, 375/144
• US Class Current: 375/144
• CPC Class Codes: H04B 1/7117 Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
• CPC Class Codes: H04B 1/712 Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop

Abstract

Managing assigned fingers in wireless telecommunication, such as Code Division Multiple Access (CDMA), using a finger lock mechanism. The method includes a series of steps, including a first step of receiving a finger assignment from a searcher portion of a communication device. Next, the signal-strength of the finger assignment is determined, and a time period over which the signal-strength exists is determined. The finger assignment is then compared to multiple signal-strength thresholds and to a time threshold. In the next step, the finger assignment is evaluated for a combing operation based upon which of the aforementioned thresholds it satiates. In particular, the finger assignment is enabled for a combining operation if it is a new finger assignment or if it continues to satiate a combine signal-strength threshold. Alternatively, the finger assignment is not enabled for combining but neither is it deassigned (e.g., a locked state) if it fails to satiate the combine signal-strength threshold but does satiate the lock signal-strength threshold without exceeding the time threshold. Lastly, control of the finger assignment is passed to the searcher if the finger assignment fails to satiate the lock signal-strength threshold.

Claims

1. A method of managing a finger assignment in a wireless communication device, said method comprising the steps of:

a) receiving said finger assignment from a searcher portion of said communication device;

b) determining a signal-strength for said finger assignment;

c) enabling said finger assignment for a combine operation if said signal-strength for said finger assignment satiates a first signal-strength threshold; and

d) preventing said finger assignment from being deassigned if said signal-strength of said finger assignment satiates a second signal-strength threshold as a function of a predetermined time period, said second signal-strength threshold being less than said first signal-strength threshold.

2. The method recited in claim 1 further comprising the step of:

e) determining said time period over which said signal-strength of said finger assignment satiates said second signal-strength threshold.

3. The method recited in claim 2 further comprising the step of:

f) preventing said finger assignment from being deassigned if said time period satiates a time threshold.

4. The method recited in claim 2 further comprising the step of:

f) allowing said finger assignment to be deassigned if said finger assignment fails to satiate said time threshold.

5. The method recited in claim 1 further comprising the step of:

e) allowing said finger assignment to be deassigned if said finger assignment fails to satiate said second signal-strength threshold.

6. The method recited in claim 1 further comprising the step of:

e) demodulating said finger assignment.

7. The method recited in claim 1 further comprising the step of:

e) filtering said signal-strength of said finger assignment as determined in step b).

8. The method of claim 1 further comprising the step of:

e) categorizing said finger assignment into one of a plurality of states based upon said signal-strength of said finger assignment.

9. The method of claim 2 further comprising the step of:

f) categorizing said finger assignment into one of a plurality of states based upon said signal-strength of said finger assignment and based upon said time period over which said signals strength exists.

10. The method of claim 8 further comprising the step of:

f) evaluating said finger assignment for said combine operation or for deassignment based upon its state.

11. A wireless communication device for managing a finger assignment, said communication device comprising:

a transceiver;

a processor, said processor coupled to said transceiver; and

a computer readable memory unit, said computer readable memory unit coupled to said processor, said computer readable memory unit containing program instructions stored therein that execute, via said processor, and cause the processor to perform the steps of;

a) receiving said finger assignment;

b) determining a signal-strength for said finger assignment;

c) enabling said finger assignment for a combine operation if said signal-strength for said finger assignment satiates a first signal-strength threshold; and

d) preventing said finger assignment from being deassigned if said signal-strength of said finger assignment satiates a second signal-strength threshold as a function of a predetermined time period, said second signal-strength threshold being less than said first signal-strength threshold.

12. The method recited in claim 11 further comprising the step of:

e) determining said time period over which said signal-strength of said finger assignment satiates said second signal-strength threshold.

13. The method recited in claim 12 further comprising the step of:

f) preventing said finger assignment from being deassigned if said time period satiates a time threshold.

14. The method recited in claim 12 further comprising the step of:

f) allowing said finger assignment to be deassigned if said finger assignment fails to satiate said time threshold.

15. The method recited in claim 11 further comprising the step of:

e) allowing said finger assignment to be deassigned if said finger assignment fails to satiate said second signal-strength threshold.

16. The method recited in claim 11 further comprising the step of:

e) demodulating said finger assignment.

17. The method recited in claim 11 further comprising the step of:

e) filtering said signal-strength of said finger assignment as determined in step b).

18. The method of claim 11 further comprising the step of:

e) categorizing said finger assignment into one of a plurality of states based upon said signal-strength of said finger assignment.

19. The method of claim 12 further comprising the step of:

f) categorizing said finger assignment into one of a plurality of states based upon said signal-strength of said finger assignment and based upon said time period over which said signals strength exists.

20. The method of claim 18 further comprising the step of:

f) evaluating said finger assignment for said combine operation or for deassignment based upon its state.

21. A computer readable medium containing therein computer readable codes for causing an electronic device to implement a method of managing said multipath signals, said method comprising the steps of:

a) receiving said finger assignment;

b) determining a signal-strength for said finger assignment;

c) enabling said finger assignment for a combine operation if said signal-strength for said finger assignment satiates a first signal-strength threshold; and

d) preventing said finger assignment from being deassigned if said signal-strength of said finger assignment satiates a second signal-strength threshold as a function of a predetermined time period, said second signal-strength threshold being less than said first signal-strength threshold.

22. The method recited in claim 21 further comprising the step of:

e) determining said time period, using said timer, over which said signal-strength of said finger assignment satiates said second signal-strength threshold.

23. The method recited in claim 22 further comprising the step of:

f) preventing said finger assignment from being deassigned if said time period satiates a time threshold.

24. The method recited in claim 22 further comprising the step of:

f) allowing said finger assignment to be deassigned if said finger assignment fails to satiate said time threshold.

25. The method recited in claim 21 further comprising the step of:

e) allowing said finger assignment to be deassigned if said finger assignment fails to satiate said second signal-strength threshold.

26. The method recited in claim 21 further comprising the step of:

e) demodulating said finger assignment.

27. The method recited in claim 21 further comprising the step of:

e) filtering said signal-strength of said finger assignment as determined in step b).

28. The method of claim 21 further comprising the step of:

e) categorizing said finger assignment into one of a plurality of states based upon said signal-strength of said finger assignment.

29. The method of claim 22 further comprising the step of:

f) categorizing said finger assignment into one of plurality of states based upon said signal-strength of said finger assignment and based upon said time period over which said signals strength exists.

30. The method of claim 28 further comprising the step of:

f) evaluating said finger assignment for said combine operation or for deassignment based upon its state.

31. An arrangement for managing a finger assignment in a wireless communication device, said arrangement comprising:

means for receiving said finger assignment from a searcher portion of said communication device;

means for determining a signal-strength for said finger assignment;

means for enabling said finger assignment for a combine operation if said signal-strength for said finger assignment satiates a first signal-strength threshold;

means for preventing said finger assignment from being deassigned if said signal-strength of said finger assignment satiates a second signal-strength threshold, said second signal-strength threshold being less than said first signal-strength threshold; and

means for determining a time period over which said signal-strength of said finger assignment satiates said second signal-strength threshold.