Semi-connected operations for wireless communications

• US 8,284,706 B2
• Filed: 09/20/2007
• Issued: 10/09/2012
• Est. Priority Date: 09/20/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Ulupinar, Fatih, Agrawal, Avneesh, Agashe, Parag A., Prakash, Rajat
• Primary Examiner(s): Scheibel, Robert
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US11/858,755
• Publication Number:
  US 20090082072A1
• Time in Patent Office: 1,846 Days
• Field of Search: 370/310, 370/311
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and methodologies are described that facilitate reducing battery consumption during periods of inactivity intermixed with traffic bursts in wireless communications systems. A semi-connected mode is provided that fast recognition of mobile devices upon wakeup and access while enabling mobile devices to operate in reduce power states. A mobile device operates in a semi-connected mode with all base stations in an active set of the mobile device. Moreover, mechanisms are provided to notify mobile devices of pending data while avoiding latency associated with paging channels.

Claims

1. A method of operating a mobile device in a wireless communications system, comprising:

initiating a semi-connected mode with one or more base stations in an active set in which the mobile device sends a semi-connected start message, retains a MAC ID that enables expedited system access, and enters a sleep state;

operating in the semi-connected mode in which the mobile device wakes at scheduled intervals to monitor for a forward link assignment block, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

exiting the semi-connected mode on receipt of the forward link assignment block on a shared signaling channel.

2. The method of claim 1, further comprising sleeping during a period of inactivity while in the semi-connected mode.

3. The method of claim 1, further comprising retaining a MAC ID from each member of the active set during periods of inactivity.

4. The method of claim 1, further comprising receiving an information block on a shared signal channel during a wakeup period.

5. The method of claim 1, wherein initiating the semi-connected mode comprises transmitting at least one message to one or more base stations in the active set that includes a parameter specifying a number of physical frames of wakeup per period.

6. The method of claim 5, wherein transmitting at least one message comprises sending the semi-connected start message to a serving sector base station.

7. The method of claim 6, wherein the start message is sent over the air or tunneled through a serving sector to all base stations in the active set.

8. The method of claim 6, further comprising receiving a semi-connect acknowledgement message in response to the start message.

9. The method of claim 1, further comprising broadcasting a semi-connect exit message to terminate the semi-connected mode.

10. The method of claim 4, wherein the information block is the forward link assignment block.

11. The method of claim 1, further comprising monitoring forward pilot channels of active set members.

12. The method of claim 11, further comprising utilizing MAC ID scrambled access to initiate handoff.

62. The method of claim 1, further comprising accessing the system with MAC ID scrambled access.

13. A wireless communications apparatus, comprising:

a memory that stores instructions related to;

initiating a semi-connected mode with one or more base stations in an active set in which a mobile device sends a semi-connected start message, retains a MAC ID that enables expedited system access, and enters a sleep state;

operating in the semi-connected mode in which the mobile device wakes at scheduled intervals to monitor for a forward link assignment block, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

exiting the semi-connected mode on receipt of the forward link assignment block on a shared signaling channel; and

a processor coupled to the memory, configured to execute the instructions retained in the memory.

14. A wireless communications apparatus that effectuates reduce power consumption during periods of inactivity, comprising:

means for initiating a semi-connected mode with one or more base stations in an active set in which a mobile device sends a semi-connected start message, retains a MAC ID that enables expedited system access, and enters a sleep state;

means for operating in the semi-connected mode in which the mobile device wakes at scheduled intervals to monitor for a forward link assignment block, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

means for exiting the semi-connected mode on receipt of the forward link assignment block on a shared signaling channel.

15. The wireless communications apparatus of claim 14, further comprising means for sleeping during a period of inactivity while in the semi-connected mode.

16. The wireless communications apparatus of claim 14, further comprising means for retaining a MAC ID from each member of the active set during periods of inactivity.

17. The wireless communications apparatus of claim 14, further comprising means for receiving an information block on a shared signal channel during a wakeup period.

18. The wireless communications apparatus of claim 14, wherein the means for initiating the semi-connected mode comprises means for transmitting at least one message to one or more base stations in the active set that includes a parameter specifying a number of physical frames of wakeup per period.

19. The wireless communications apparatus of claim 18, wherein transmitting at least one message comprises sending the semi-connected start message to a serving sector base station.

20. The wireless communications apparatus of claim 19, wherein the start message is sent over the air or tunneled through a serving sector to all base stations in the active set.

21. The wireless communications apparatus of claim 20, further comprising means for receiving a semi-connected acknowledgement message in response to the start message.

22. The wireless communications apparatus of claim 14, further comprising means for broadcasting a semi-connected exit message to terminate the semi-connected mode.

23. The wireless communications apparatus of claim 17, wherein the information block is the forward link assignment block.

24. The wireless communications apparatus of claim 14, further comprising means for monitoring forward pilot channels of active set members.

25. The wireless communications apparatus of claim 24, further comprising utilizing MAC ID scrambled access to initiate handoff.

63. The wireless communications apparatus of claim 14, further comprising means for accessing the system with MAC ID scrambled access.

26. A non-transitory machine-readable medium having stored thereon machine-executable instructions for:

initiating a semi-connected mode with one or more base stations in an active set in which a mobile device sends a semi-connected start message, retains a MAC ID that enables expedited system access, and enters a sleep state;

operating in the semi-connected mode in which the mobile device wakes at scheduled intervals to monitor for a forward link assignment block, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

exiting the semi-connected mode on receipt of the forward link assignment block on a shared signaling channel.

27. The machine-readable medium of claim 26, further comprising sleeping during a period of inactivity while in the semi-connected mode.

28. The machine-readable medium of claim 26, further comprising retaining a MAC ID from each member of the active set during periods of inactivity.

29. The machine-readable medium of claim 26, further comprising receiving an information block on a shared signal channel during a wakeup period.

30. The machine-readable medium of claim 26, wherein initiating the semi-connected mode comprises transmitting at least one message to one or more base stations in the active set that includes a parameter specifying a number of physical frames of wakeup per period.

31. The machine-readable medium of claim 30, wherein transmitting at least one message comprises sending the semi-connected start message to a serving sector base station.

32. The machine-readable medium of claim 31, wherein the start message is sent over the air or tunneled through a serving sector to all base stations in the active set.

33. The machine-readable medium of claim 32, further comprising receiving a semi-connected acknowledgement message in response to the start message.

34. The machine-readable medium of claim 26, further comprising broadcasting a semi-connected exit message to terminate the semi-connected mode.

35. The machine-readable medium of claim 29, wherein the information block is a forward link assignment block.

36. The machine-readable medium of claim 26, further comprising instructions for monitoring forward pilot channels of active set members.

37. The machine-readable medium of claim 36, further comprising instructions for utilizing MAC ID scrambled access to initiate handoff.

64. The machine-readable medium of claim 26, further comprising accessing the system with MAC ID scrambled access.

38. In a wireless communication system, an apparatus comprising:

a processor configured to;

initiate a semi-connected mode with one or more base stations in an active set in which a mobile device sends a semi-connected start message, retains a MAC ID that enables expedited system access, and enters a sleep state;

operate in the semi-connected mode in which the mobile device wakes at scheduled intervals to monitor for a forward link assignment block, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

exit the semi-connected mode on receipt of the forward link assignment block on a shared signaling channel.

39. A method of operating a mobile device in a wireless communications system, comprising:

initiating a semi-connected mode with one or more base stations in an active set in which the mobile device sends a semi-connected start message, retains a MAC ID that enables expedited system access, and enters a sleep state;

operating in the semi-connected mode in which the mobile device wakes at scheduled intervals to monitor for a forward link assignment block, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

exiting the semi-connected mode on receipt of the forward link assignment block on a shared signaling channel thereby enabling expedited system access by receiving the forward link assignment block as a paging mechanism.

40. The method of claim 39, further comprising identifying the mobile device through the MAC ID retained by the mobile device.

41. The method of claim 40, further comprising providing quality of service (QoS) treatment to the mobile device upon access.

42. The method of claim 39, further comprising maintaining a forward link while not transmitting on a reverse link.

43. The method of claim 39, further comprising transmitting at least one acknowledgement message in response to the request.

44. The method of claim 39, further comprising detecting a false handoff.

45. The method of claim 44, wherein detecting the false handoff comprises:

starting a timer when a non-serving base station grabs a tunnel;

reacquiring the tunnel upon timer expiration; and

deleting the timer upon receipt of a semi-connected exit message.

46. A wireless communications apparatus, comprising:

a memory that stores instructions related to;

receiving a request from a mobile device to initiate a semi-connected mode;

retaining a MAC ID of the mobile device to enable expedited system access;

transmitting a forward link assignment block on a shared signaling channel to notify the mobile device of pending data and to cause the mobile device to exit the semi-connected mode, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

accepting access using the MAC ID; and

a processor coupled to the memory, configured to execute the instructions retained in the memory.

47. A wireless communications apparatus, comprising:

means for receiving a request from a mobile device to initiate a semi-connected mode;

means for retaining a MAC ID of the mobile device to enable expedited system access;

means for transmitting a forward link assignment block on a shared signaling channel to notify the mobile device of pending data and to cause the mobile device to exit the semi-connected mode, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

means for accepting communications using the MAC ID.

48. The wireless communications apparatus of claim 47, further comprising means for identifying the mobile device through the MAC ID retained by the mobile device.

49. The wireless communications apparatus of claim 48, further comprising means for providing quality of service (QoS) treatment to the mobile device upon access.

50. The wireless communications apparatus of claim 47, further comprising means for maintaining a forward link while not transmitting on a reverse link.

51. The wireless communications apparatus of claim 47, further comprising means for transmitting at least one acknowledgement message response to the request.

52. The wireless communications apparatus of claim 47, further comprising means for detecting a false handoff.

53. The wireless communications apparatus of claim 52, wherein means for detecting the false handoff comprises:

means for initiating a timer when a non-serving base station grabs a tunnel;

means for reacquiring the tunnel upon timer expiration; and

means for deleting the timer upon receipt of a semi-connect exit message.

54. A non-transitory machine-readable medium having stored thereon machine-executable instructions for:

receiving a request from a mobile device to initiate a semi-connected mode;

retaining a MAC ID of the mobile device to enable expedited system access;

transmitting a forward link assignment block on a shared signaling channel to notify the mobile device of pending data and to cause the mobile device to exit the semi-connected mode, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

accepting communications using the MAC ID.

55. The machine-readable medium of claim 54, further comprising identifying the mobile device through the MAC ID retained by the mobile device.

56. The machine-readable medium of claim 55, further comprising providing quality of service (QoS) treatment to the mobile device upon access.

57. The machine-readable medium of claim 54, further comprising maintaining a forward link while not transmitting on a reverse link.

58. The machine-readable medium of claim 54, further comprising transmitting at least one acknowledgement message response to the request.

59. The machine-readable medium of claim 54, further comprising detecting a false handoff.

60. The machine-readable medium of claim 59, wherein detecting the false handoff comprises:

starting a timer when a non-serving base station grabs a tunnel;

reacquiring the tunnel upon timer expiration; and

deleting the timer upon receipt of a semi-connect exit message.

61. In a wireless communication system, an apparatus comprising:

a processor configured to;

receive a request from a mobile device to initiate a semi-connected mode;

retain a MAC ID of the mobile device to enable expedited system access;

transmit a forward link assignment block on a shared signaling channel to notify the mobile device of pending data and to cause the mobile device to exit the semi-connected mode, wherein the forward link assignment block is employed as a page mechanism that bypasses traditional paging channels to provide expedited system access; and

accept communications using the MAC ID.