Method for determining whether to wake up a mobile station

• US 6,505,058 B1
• Filed: 02/26/1999
• Issued: 01/07/2003
• Est. Priority Date: 12/04/1998
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Willey, W. Daniel
• Primary Examiner(s): APPIAH, CHARLES NANA
• Application Number:
  US09/258,985
• Time in Patent Office: 1,411 Days
• Field of Search: 455/343, 455/383, 455/515, 455/507, 455/517, 455/458, 455/434, 455/574, 455/553, 455/552, 455/419, 455/422, 455/436, 455/455, 455/575, 455/13.4, 455/70, 455/69, 455/522, 455/442, 455/561, 340/7.32, 340/7.33
• US Class Current: 455/574
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention provides a method for determining whether to wake up a mobile station. The mobile station includes first configuration parameters relating to a base station. The method includes the steps of receiving a configuration change indicator at the mobile station. The configuration change indicator is indicative that the first configuration parameters relating to the base station are different than second configuration parameters that currently relate to the base station. The method further includes waking up the mobile station to receive the second configuration parameters.

Claims

1. A method for determining whether to wake up a mobile station to receive configuration information relating to a base station, the method comprising the steps of:

monitoring, at the mobile station and after an idle handoff, a quick paging channel comprising paging indicators and a configuration change indicator;

receiving, by the mobile station, the configuration change indicator;

determining, by the mobile station, whether there has been a configuration change based at least in part upon the configuration change indicator;

when the mobile station determines that there has been a configuration change, waking up the mobile station to receive updated configuration information; and

when the mobile station determines that there has not been a configuration change, ceasing monitoring of a succeeding configuration change indicator without updating stored configuration information.

2. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein first configuration parameters were received on a first channel, and wherein the step of waking up the mobile station to receive configuration information comprises waking up the mobile station to receive second configuration parameters on a second channel distinct from the first channel.

3. A method for determining whether to wake up a mobile station in accordance with claim 1, further comprising the step of receiving, at the mobile station, second configuration parameters.

4. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the beginning of a QPCH slot occurs approximately 100 ms earlier in time than the beginning of the associated PCH slot.

5. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein a first paging indicator bit is in one of a first two 20 ms frames of a QPCH slot.

6. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the second paging indicator bit is in the frame two frames after the frame containing the mobile station'"'"'s first paging indicator bit.

7. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the positions of a mobile station'"'"'s QPCH paging indicator bits within a QPCH slot vary as a function of the system time.

8. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein a Configuration Change indicator bit is reserved approximately every 10 ms as a QPCH bit.

9. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein a QPCH bit is reserved as a Configuration Change indicator bit approximately every 5 ms.

10. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein a QPCH bit is reserved as a Configuration Change indicator bit approximately every 20 ms.

11. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, when the base station changes the configuration parameter values, the base station sets all Configuration Change indicator bits.

12. A method for determining whether to wake up a mobile station in accordance with claim 11, further comprising transmitting using On-Off Keying as with paging indicator QPCH bits, to “

ON”

13. A method for determining whether to wake up a mobile station in accordance with claim 11, wherein the base station sets all Configuration Change indicator bits for approximately 10 minutes after changing the configuration information.

14. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, if the mobile station is confident that there is no page and is confident that there was no configuration change, the mobile station goes to sleep until the next quick paging slot.

15. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, once the mobile station is confident that there is no change in configuration, the mobile station does not receive a configuration change bit in a subsequent quick paging slot.

16. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station receives the paging indicator bits to determine whether to wake up for the PCH.

17. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein if neither paging indicator bit was “

OFF”

, the mobile station wakes up and receives the PCH.

18. A method for determining whether to wake up a mobile station in accordance with claim 17, wherein the mobile station wakes up and receives the PCH until it receives a page directed to it.

19. A method for determining whether to wake up a mobile station in accordance with claim 17, wherein the mobile station wakes up and receives the PCH until it determines that there are no pages for it in the PCH slot.

20. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station goes to sleep until the next QPCH bit after receiving the updated configuration parameters.

21. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, if there is no BCCH and the mobile station does not determine that that one of the paging indicator bits is off, the mobile station avoids being awake for the configuration change indicator bit.

22. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, when the base station updates its configuration parameter value information, the base station sets all QPCH paging indicator bits to “

ON”

for an amount of time which is a function of the maximum slot cycle index.

23. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the first paging indicator for the mobile station is assigned between about 100 milliseconds and 80 milliseconds before the paging channel slot.

24. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the second paging indicator is assigned between about 60 milliseconds and 40 milliseconds before the paging channel slot.

25. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the first paging indicator for the mobile station is assigned between about 80 ms and 60 ms before the paging channel slot.

26. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the second paging indicator is assigned between about 40 ms and 20 ms before the paging channel slot.

27. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the configuration change indicators are scheduled about at 10 ms intervals on the Quick Paging Channel.

28. A method of determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station operates in a non-slotted mode until the mobile station has received at least one valid configuration message on the new Paging Channel.

30. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, if the base station operates with a Quick Paging Channel, after any configuration parameter value is updated, the base station sets all paging indicators to “

ON”

for each Quick Paging Channel slot for a time interval of T units of 1.28 seconds, where;

31. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the Quick Paging Channel slots are those slots for which

29. A method for determining whether to wake up a mobile station in accordance with claim 29, wherein, following the reception of the valid configuration message, the mobile station resumes slotted mode operation.

32. A method for determining whether to wake up a mobile station to receive configuration parameters relating to a base station, the method comprising the steps of:

engaging in an idle handoff and being assigned the base station as a result of the handoff;

receiving a configuration change indicator at the mobile station, the configuration change indicator relating to the base station;

determining whether the configuration change indicator indicates a change in configuration parameters of the base station;

when the configuration change indicator fails to indicate a change in configuration parameters of the base station, going to sleep without updating stored configuration parameters;

when the configuration change indicator indicates a change in configuration parameters of the base station, receiving, at the mobile station, the updated configuration parameters; and

wherein the step of receiving the updated configuration parameters comprises a step of, when the configuration change indicator indicates a change in configuration parameters of the base station, going to sleep after receiving the configuration change indicator and subsequently waking up to receive the updated configuration parameters.

33. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein the updated configuration parameters comprise second configuration parameters, wherein the configuration change indicator indicates that first configuration parameters relating to the base station are different than the second configuration parameters, wherein the first configuration parameters were received on a first channel, and wherein the step of receiving, at the mobile station, the updated configuration parameters comprises a step of receiving, at the mobile station, the second configuration parameters on a second channel distinct from the first channel.

34. A method for determining whether to wake up a mobile station in accordance with claim 32, further comprising the step of determining, at the mobile station, whether configuration parameter values at the mobile station are up-to-date by checking another message when the mobile station wakes up for its paging channel slot.

35. A method for determining whether to wake up a mobile station in accordance with claim 32, further comprising the step of staying awake, if a configuration sequence number does not match the mobile station'"'"'s stored value, for a longer amount of time to receive new configuration parameter values.

36. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein the mobile station receives the configuration parameter values again if a sequence number matches the stored value for the base station.

37. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein configuration parameters are updated by receiving a special broadcast channel (BCCH), over which configuration parameter messages are sent, for a period of time until all configuration parameters are up-to-date.

38. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein the mobile station receives and combines multiple configuration change quick bits.

39. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if the mobile station determines that the configuration has changed after receiving a configuration change quick bit, the mobile station wakes up for its regular paging slot and stays awake until the con figuration parameter values are up-to-date.

40. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if a broadcast channel (BCCH) is used and the mobile station determines that the configuration has changed after receiving the configuration change indicator bit, the mobile station wakes up and receives the BCCH until the configuration parameter values are up-to-date.

41. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein the mobile station wakes up and receives its PCH slot first and then receives the BCCH.

42. A method for determining whether to wake up a mobile station in accordance with claim 32, further comprising steps of:

after engaging in the idle handoff, determining whether a configuration parameter value timer has expired; and

when the configuration parameter value timer has expired, waking up and receiving updated configuration parameter values.

43. A method for determining whether to wake up a mobile station in accordance with claim 42, wherein the mobile station receives the BCCH and simultaneously receives the PCH based upon paging indicator bits.

44. A method for determining whether to wake up a mobile station in accordance with claim 42, wherein simultaneous demodulation of the PCH and BCCH minimizes the amount of time the radio receiver and associated hardware are consuming power.

45. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if a BCCH is configured, the mobile station preferably wakes up for the BCCH without waking up for the configuration change indicators.

46. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if the mobile station determines that a second configuration change indicator bit is set to “

OFF”

, the mobile station goes to sleep.

47. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if the mobile station determines that a second configuration change indicator bit is not set to “

OFF”

, the mobile station determines whether the configuration change bits are “

OFF”

by combining the results of the first two configuration change indicator bits.

48. A method for determining whether to wake up a mobile station in accordance with claim 47, wherein, if after combining the two configuration change indicator bits the mobile station is confident there has not been a configuration change, the mobile station goes to sleep.

49. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if the mobile station determines that the configuration change indicator bits are not “

OFF”

, the mobile station remains awake for another configuration change bit.

50. A method for determining whether to wake up a mobile station in accordance with claim 32, wherein, if the mobile station receives a configuration change indicator bit and determines that it is “

ON”

, the mobile station does not stay awake to receive a subsequent configuration change indicator bit.

51. A method for determining whether to wake up a mobile station comprising the steps of:

engaging in an idle handoff and being assigned a base station as a result of the handoff;

receiving, at the mobile station, a paging indicator and a configuration change indicator from the base station;

determining whether the mobile station is being paged based on the paging indicator;

determining whether configuration information relating to the base station has changed based on the configuration change indicator;

when the configuration information have not changed and the mobile station is not being paged, going to sleep without updating stored configuration parameters;

when the configuration information has changed, receiving, at the mobile station, updated configuration information;

when the mobile station is being paged, receiving, at the mobile station, the page; and

wherein the step of receiving the updated configuration information comprises a step of, when the configuration change indicator indicates a change in configuration parameters of the base station, going to sleep after receiving the configuration change indicator and subsequently waking up to receive the updated configuration information.

52. A method for determining whether to wake up a mobile station in accordance with claim 51, wherein the configuration information comprises second configuration parameters, wherein the method further comprises a stop of storing, by the mobile station, first configuration parameters received on a first channel, and wherein the step of receiving, at the mobile station, the second configuration parameters comprises receiving, at the mobile station, the second configuration parameters on a second channel distinct from the first channel.

53. A method for determining whether to wake up a mobile station in accordance with claim 51, further comprising the step of receiving at the mobile station, a paging indicator bit.

54. A method for determining whether to wake up a mobile station in accordance with claim 51, further comprising the steps of:

receiving, at the mobile station, the first paging indicator;

staying awake until the next scheduled configuration change indicator bit;

receiving the next scheduled configuration change indicator bit; and

going back to sleep.

55. A method for determining whether to wake up a mobile station in accordance with claim 51, wherein, if the mobile station does not determine that a first paging indicator is set to “

OFF”

, the mobile station wakes up to receive a second paging indicator.

56. A method for determining whether to wake up a mobile station in accordance with claim 51, wherein, if the mobile station receives a second paging indicator and determines that it is set to “

OFF”

, the mobile station stays awake to receive a second configuration change indicator bit.

57. A method for determining whether to wake up a mobile station in accordance with claim 51, wherein, if the mobile station does not detect that a first assigned paging indicator is “

OFF”

, the mobile station receives a second paging indicator.

58. A method for determining whether to wake up a mobile station in accordance with claim 51, wherein, if the mobile station does not detect that a second assigned paging indicator is “

OFF”

, the mobile station receives its assigned Paging Channel slot immediately following its assigned Quick Paging Channel slot.

59. A method for determining whether to wake up a mobile station in accordance with claim 51, wherein, to determine the mobile station'"'"'s assigned paging indicators, the base station uses the same formula as used by the mobile station.