Preamble length for discontinuous control channel transmission

• US 8,521,205 B2
• Filed: 08/04/2006
• Issued: 08/27/2013
• Est. Priority Date: 08/05/2005
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Vimpari, Anna-Mari, Malkamki, Esa, Nauha, Jukka, Ranta-Aho, Karri
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): AYOTUNDE, AYODEJI O
• Application Number:
  US11/499,847
• Publication Number:
  US 20070030829A1
• Time in Patent Office: 2,580 Days
• Field of Search: None
• US Class Current: 455/522
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0085 when channel conditions change
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 52/58 Format of the TPC bits

Abstract

The specification and drawings present a new method, system, apparatus and software product for defining a preamble length of a preamble (e.g., a power control preamble) for a discontinuous control channel transmission using, e.g., a dedicated physical control channel (DPCCH) for transmitting the preamble. The preamble length can be optimized using a predetermined criterion depending on a transmission gap length (which can be variable) in the discontinuous control signal (e.g., transmitted on the DPCCH) or in a discontinuous data signal, e.g., transmitted on an enhanced dedicated channel (E-DCH), and/or on a length of a transmission timing interval (TTI) of the discontinuous data. Furthermore, a power in the preamble can be changed in time using a further predetermined criterion.

Claims

1. A method, comprising:

providing a discontinuous data signal for transmission on a data channel transmitted from a user equipment to a network element and a discontinuous control signal for transmission on a control channel that is transmitted separate from said data channel from said user equipment to said network element;

defining a preamble length of a power control preamble according to a predetermined criterion, wherein said preamble length depends on a transmission gap length in said discontinuous control signal or in said discontinuous data signal, wherein the predetermined criterion is a length of time prior to the control signal or the data signal being transmitted in uplink;

transmitting a preamble signal comprising said power control preamble on said control channel before or simultaneously with said data signal on said data channel; and

receiving feedback for power adjustment.

2. The method of claim 1, wherein said transmission gap length is variable.

3. The method of claim 1, wherein said preamble length is non-zero only if said transmission gap length exceeds a pre-defined threshold value.

4. The method of claim 1, wherein said preamble length is variable.

5. A non-transitory computer readable medium comprising code that when executed causes a computer processor to perform the method of claim 1.

19. The method of claim 1, wherein said preamble length depends on at least one of said transmission gap length in said discontinuous control signal and a length of a transmission timing interval of said discontinuous data signal.

20. The method of claim 1, wherein said preamble length depends on said transmission gap length in said discontinuous control signal and a length of a transmission timing interval of said discontinuous data signal.

21. The method of claim 1, wherein a shorter preamble length depends on a shorter transmission gap length.

22. The method of claim 19, wherein a shorter preamble length depends on a shorter transmission gap length or a longer transmission timing interval.

23. The method of claim 20, wherein a shorter preamble length depends on a shorter transmission gap length and a longer transmission timing interval.

29. The method of claim 1, wherein said preamble length is measured as one or more slots of a frame.

6. An apparatus comprising:

at least one processor and at least one non-transitory computer readable medium including software configured to, with the at least one processor, cause the apparatus at least to;

provide a discontinuous data signal for transmission on a data channel transmitted from a user equipment to a network element and a discontinuous control signal for transmission on a control channel that is transmitted separate from said data channel from said user equipment to said network element, wherein a preamble length of a power control preamble is defined according to a predetermined criterion, said preamble length depends on a transmission gap length in said discontinuous control signal or in said discontinuous data signal, wherein the predetermined criterion is a length of time prior to the control signal or the data signal being transmitted in uplink;

transmit a preamble signal comprising said power control preamble on said control channel before or simultaneously with said data signal on said data channel; and

receive feedback for power adjustment.

7. The user equipment of claim 6, wherein said transmission gap length is variable.

8. The apparatus of claim 6, wherein before said apparatus is caused to transmit said preamble, said at least one processor and said at least one non-transitory computer readable medium including software are further configured to cause said apparatus to define a time dependence of a preamble power of said preamble.

9. The apparatus of claim 6, wherein said at least one processor and said at least one non-transitory computer readable medium including software are further configured to cause said apparatus to change said preamble length by a pre-selected value after said transmission gap length is changed.

10. The apparatus of claim 6, wherein said preamble length is non-zero only if said transmission gap length exceeds a pre-defined threshold value.

11. The apparatus of claim 6, wherein said preamble length is variable.

24. The apparatus of claim 6, wherein said preamble length depends on at least one of said transmission gap length in said discontinuous control signal and a length of a transmission timing interval of said discontinuous data signal.

25. The apparatus of claim 6, wherein said preamble length depends on said transmission gap length in said discontinuous control signal and a length of a transmission timing interval of said discontinuous data signal.

26. The apparatus of claim 6, wherein a shorter preamble length depends on a shorter transmission gap length.

27. The apparatus of claim 24, wherein a shorter preamble length depends on a shorter transmission gap length or a longer transmission timing interval.

28. The apparatus of claim 25, wherein a shorter preamble length depends on a shorter transmission gap length and a longer transmission timing interval.

30. The apparatus of claim 6, wherein said preamble length is measured as one or more slots of a frame.

12. A user equipment, comprising:

means for signal generation, for providing a discontinuous data signal for transmission on a data channel transmitted from a user equipment to a network element and a discontinuous control signal for transmission on a control channel that is transmitted separate from said data channel from said user equipment to said network element, wherein a preamble length of a power control preamble is defined according to a predetermined criterion, said preamble length depends on transmission gap length in said discontinuous control signal or in said discontinuous data signal, wherein the predetermined criterion is a length of time prior to the control signal or the data signal being transmitted in uplink; and

means for receiving and transmitting, for transmitting said power control preamble on said control channel before or simultaneously with said data signal on said data channel and for receiving feedback for power adjustment.

13. The user equipment of claim 12, wherein the means for signal generation is configured to provide scheduling of said discontinuous control signal.

14. The user equipment of claim 12, wherein said control channel is an uplink channel transmitting said power control preamble from said user equipment to a network element.

31. The user equipment of claim 12, wherein said preamble length is measured as one or more slots of a frame.

15. An apparatus, comprising:

at least one processor and at least one non-transitory computer readable medium including software configured to, with the at least one processor, cause the apparatus to provide a discontinuous data signal for transmission on a data channel transmitted from a user equipment to a network element and a discontinuous control signal for transmission on a control channel that is transmitted separate from said data channel from said user equipment to said network element;

define a preamble length of a power control preamble according to a predetermined criterion, wherein said preamble length depends on a transmission gap length in said discontinuous control signal or in said discontinuous data signal, wherein the predetermined criterion is a length of time prior to the control signal or the data signal being transmitted in uplink;

transmit a preamble signal comprising said power control preamble on said control channel before or simultaneously with said data signal on said data channel; and

receive feedback for power adjustment.

16. The apparatus of claim 15, wherein said transmission gap length is variable.

32. The apparatus of claim 15, wherein said preamble length is measured as one or more slots of a frame.

17. An apparatus, comprising:

at least one processor and at least one non-transitory computer readable medium including software configured to, with the at least one processor, cause the apparatus to receive an uplink discontinuous control transmitted from a user equipment on a control channel and an uplink discontinuous data signal separately transmitted from said user equipment on a different data channel, and transmit, in response to a preamble signal comprising a power control preamble from said user equipment, a preamble feedback signal comprising feedback information for a power adjustment, wherein a preamble length of said power control preamble is defined according to a predetermined criterion, said preamble length depends on a transmission gap length in said uplink discontinuous control signal or in said uplink discontinuous data signal provided by the user equipment, wherein the predetermined criterion is a length of time prior to the control signal or the data signal being transmitted in uplink.

18. The apparatus of claim 17, wherein said transmission gap length is variable.

33. The apparatus of claim 17, wherein said preamble length is measured as one or more slots of a frame.