Frame termination

• US 8,743,909 B2
• Filed: 02/19/2009
• Issued: 06/03/2014
• Est. Priority Date: 02/20/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Black, Peter John, Attar, Rashid Ahmed Akbar, Jou, Yu-Cheun
• Primary Examiner(s): Rutkowski, Jeffrey M
• Application Number:
  US12/389,211
• Publication Number:
  US 20090232052A1
• Time in Patent Office: 1,930 Days
• Field of Search: None
• US Class Current: 370/477
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 52/58 Format of the TPC bits

Abstract

Techniques to increase capacity in a wireless communications system. In an aspect, systematic non-transmission, or “blanking,” of minimal-rate frames transmitted in a communications system is provided. In an exemplary embodiment, eighth rate frames in a cdma2000 voice communications system are systematically substituted with null-rate frames carrying zero traffic bits. Provisions are nevertheless made for the transmission of certain designated as “critical” by, e.g., a vocoder. The receiver detects the presence of null rate or non-null rate transmissions and processes the received frames accordingly, including updating an outer loop power control only in response to non-null rate frames. Further techniques for changing the pilot transmission gating pattern to assist the receiver in detecting null rate frames are provided. In another aspect, early termination of a signal transmission over a wireless communications link is provided. In an exemplary embodiment, a base station (BS) transmits power control groups (PCG'"'"'s) for a frame over a forward link (FL) to a mobile station (MS) until accurate reception of the frame is acknowledged by the MS over a reverse link (RL), possibly before all PCG'"'"'s of the frame are received over the FL. Possible ACK signaling methods are defined for channels associated with a cdma2000 wireless communications system. In another exemplary embodiment, techniques for reverse link early termination are also provided.

Claims

1. A method of controlling a wireless communication device, the method comprising:

receiving an acknowledgement message from an access point that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

stopping transmission of the frame responsive to the acknowledgement message;

gating a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

2. The method of claim 1, wherein the acknowledgement message can be received from any cell in an active set.

3. The method of claim 2, wherein the wireless communication device comprises an access terminal.

4. The method of claim 1, wherein the wireless communication device comprises an access terminal.

5. A method of controlling a wireless communication device, the method comprising:

receiving an acknowledgement message from an access terminal that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

stopping transmission of the frame responsive to the acknowledgement message; and

gating a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

6. The method of claim 5, wherein the wireless communication device comprises an access point.

7. A method of controlling a wireless communication device, the method comprising:

decoding each of a plurality of power control bits as received;

transmitting an acknowledgement message to terminate transmission of a frame on a forward link responsive to successfully decoding the frame, wherein the transmitting is prior to receiving all of the plurality of power control bits allocated for the frame; and

restricting the transmitting according to an acknowledgement transmission mask, the acknowledgement transmission mask allowing transmission after a threshold number of the plurality of power control bits has been received.

8. The method of claim 7, wherein the wireless communication device comprises an access point.

9. The method of claim 7, wherein the wireless communication device comprises an access terminal.

10. A wireless communication device, comprising:

means for receiving an acknowledgement message from an access point that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

means for stopping transmission of the frame responsive to the acknowledgement message; and

means for gating a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

11. The wireless communication device of claim 10, wherein the acknowledgement message can be received from any cell in an active set.

12. The wireless communication device of claim 11, wherein the wireless communication device comprises an access terminal.

13. The wireless communication device of claim 10, wherein the wireless communication device comprises an access terminal.

14. A wireless communication device, comprising:

means for receiving an acknowledgement message from an access terminal that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

means for stopping transmission of the frame responsive to the acknowledgement message; and

means for gating a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

15. The wireless communication device of claim 14, wherein the wireless communication device comprises an access point.

16. A wireless communication device, comprising:

means for decoding each of a plurality of power control bits as received;

means for transmitting an acknowledgement message to terminate transmission of a frame on a forward link responsive to successfully decoding the frame, wherein the transmitting is prior to receiving all of the plurality of power control bits allocated for the frame; and

means for restricting the transmitting according to an acknowledgement transmission mask, the acknowledgement transmission mask allowing transmission after a threshold number of the plurality of power control bits has been received.

17. The wireless communication device of claim 16, wherein the wireless communication device comprises an access point.

18. The wireless communication device of claim 16, wherein the wireless communication device comprises an access terminal.

19. A computer program product, comprising:

a non-transitory computer-readable medium having program code recorded thereon, the program code comprising;

program code to receive an acknowledgement message from an access point that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

program code to stop transmission of the frame responsive to the acknowledgement message; and

program code to gate a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

20. The computer program product of claim 19, wherein the acknowledgement message can be received from any cell in an active set.

21. The computer program product of claim 20, wherein the wireless communication device comprises an access terminal.

22. The computer program product of claim 19, wherein the wireless communication device comprises an access terminal.

23. A computer program product, comprising:

a non-transitory computer-readable medium having program code recorded thereon, the program code comprising;

program code to receive an acknowledgement message from an access terminal that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

program code to stop transmission of the frame responsive to the acknowledgement message; and

program code to gate a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

24. The computer program product of claim 23, wherein the wireless communication device comprises an access point.

25. A computer program product, comprising:

a non-transitory computer-readable medium having program code recorded thereon, the program code comprising;

program code to decode each of a plurality of power control bits as received;

program code to transmit an acknowledgement message to terminate transmission of a frame on a forward link responsive to successfully decoding the frame, wherein the program code to transmit is executed prior to receiving all of the plurality of power control bits allocated for the frame; and

program code to restrict execution of the program code to transmit according to an acknowledgement transmission mask, the acknowledgement transmission mask allowing transmission after a threshold number of the plurality of power control bits has been received.

26. The computer program product of claim 25, wherein the wireless communication device comprises an access point.

27. The computer program product of claim 25, wherein the wireless communication device comprises an access terminal.

28. A wireless communication apparatus, comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to;

receive an acknowledgement message from an access point that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

stop transmission of the frame responsive to the acknowledgement message; and

gate a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

29. The wireless communication apparatus of claim 28, wherein the acknowledgement message can be received from any cell in an active set.

30. The wireless communication apparatus of claim 29, wherein the wireless communication device comprises an access terminal.

31. The wireless communication apparatus of claim 28, wherein the wireless communication device comprises an access terminal.

32. A wireless communication apparatus, comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to;

receive an acknowledgement message from an access terminal that a frame has been successfully decoded prior to completed transmission of all power control bits allocated for the frame, wherein the acknowledgement message is received in a symbol position of a received power control bit;

stop transmission of the frame responsive to the acknowledgement message; and

gate a pilot signal, responsive to the acknowledgement message, for select power control groups according to a gated pilot pattern that is used to signal transmission of a null rate frame.

33. The wireless communication apparatus of claim 32, wherein the wireless communication device comprises an access point.

34. A wireless communication apparatus, comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to;

decode each of a plurality of power control bits as received;

transmit an acknowledgement message to terminate transmission of a frame on a forward link responsive to successfully decoding the frame, wherein the at least one processor is configured to transmit prior to receiving all of the plurality of power control bits allocated for the frame; and

wherein the at least one processor is further configured to restrict execution of the program code to transmit according to an acknowledgement transmission mask, the acknowledgement transmission mask allowing transmission after a threshold number of the plurality of power control bits has been received.

35. The wireless communication apparatus of claim 34, wherein the wireless communication device comprises an access point.

36. The wireless communication apparatus of claim 34, wherein the wireless communication device comprises an access terminal.