Method for determining whether to wake up a mobile station

• US 20020025811A1
• Filed: 08/23/2001
• Published: 02/28/2002
• Est. Priority Date: 12/04/1998
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Willey, W. Daniel
• Granted Patent: US 6,889,067 B2
• Time in Patent Office: Days
• US Class Current: 455/434
• 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, the mobile station including first configuration parameters relating to a base station, the method comprising the steps of:

receiving a configuration change indicator at the mobile station, the configuration change indicator indicative that the first configuration parameters relating to the base station are different than second configuration parameters relating to the base station; and

waking up the mobile station to receive the second configuration parameters.

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

4. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

5. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

6. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station receives the configuration parameter values again if a sequence number matches the stored value for the base station.

7. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

8. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station receives and combines multiple configuration change quick bits.

9. A method for determining whether to wake up a mobile station in accordance with claim 1, 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 configuration parameter values are up-to-date.

10. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

11. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station wakes up and receives its PCH slot first and then receives the BCCH.

12. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein the mobile station supports simultaneous demodulation of a BCCH and a PCH.

13. A method for determining whether to wake up a mobile station in accordance with claim 12, wherein the mobile station receives the BCCH and simultaneously receives the PCH based upon the paging indicator bits.

14. A method for determining whether to wake up a mobile station in accordance with claim 12, wherein simultaneous demodulation of the PCH and BCCH minimizes the amount of time the radio receiver and associated hardware are consuming power.

15. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, if a BCCH is configured, the mobile station preferably wakes up for the BCCH without waking up for the configuration change indicators.

16. A method for determining whether to wake up a mobile station in accordance with claim 1, wherein, if the mobile station determines that a second configuration change indicator bit is set to “

OFF”

, the mobile station goes to sleep.

17. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

18. A method for determining whether to wake up a mobile station in accordance with claim 17, 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.

19. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

20. A method for determining whether to wake up a mobile station in accordance with claim 1, 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.

21. 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:

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

waking up the mobile station based at least in part upon the configuration change indicator to receive the configuration information relating to the base station.

22. A method for determining whether to wake up a mobile station in accordance with claim 21, wherein the first configuration parameters were received on a first channel, and wherein the step of waking up the mobile station to receive second configuration parameters comprises waking up the mobile station on a second channel distinct from the first channel.

23. A method for determining whether to wake up a mobile station in accordance with claim 21, further comprising the step of receiving, at the mobile station, second configuration parameters.

24. A method for determining whether to wake up a mobile station in accordance with claim 21, further comprising the step of receiving, at the mobile station, a paging indicator bit.

25. A method for determining whether to wake up a mobile station in accordance with claim 21, 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.

26. A method for determining whether to wake up a mobile station in accordance with claim 21, 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.

27. A method for determining whether to wake up a mobile station in accordance with claim 21, 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.

28. A method for determining whether to wake up a mobile station in accordance with claim 21, wherein, if the mobile station does not detect that a first assigned paging indicator is “

OFF”

, the mobile station receives a second paging indicator.

29. A method for determining whether to wake up a mobile station in accordance with claim 21, 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.

30. A method for determining whether to wake up a mobile station in accordance with claim 21, wherein, to determine the mobile station'"'"'s assigned paging indicators, the base station uses the same formula as used by the mobile station.

31. 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:

receiving, at the mobile station, a quick paging channel, the quick paging channel including paging indicators and a configuration change indicator; and

waking up the mobile station based at least in part upon the configuration change indicator to receive the configuration information relating to the base station.

32. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the first configuration parameters were received on a first channel, and wherein the step of waking up the mobile station to receive the second configuration parameters comprises waking up the mobile station on a second channel distinct from the first channel.

33. A method for determining whether to wake up a mobile station in accordance with claim 31, further comprising the step of receiving, at the mobile station, second configuration parameters.

34. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the beginning of a QPCH slot occurs approximately 100 ms earlier in time than the beginning of the associated PCH slot.

35. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the first paging indicator bit in a QPCH slot is in one of the first two 20 ms frames of the QPCH slot.

36. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the second paging indicator bit is in the frame two frames after the frame containing the mobile station'"'"'s first paging indicator bit.

38. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the positions of a mobile station'"'"'s QPCH paging indicator bits within a QPCH slot vary as a function of the system time.

39. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein a Configuration Change indicator bit is reserved approximately every 10 ms as a QPCH bit.

40. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein a QPCH bit is reserved as a Configuration Change indicator bit approximately every 5 ms.

41. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein a QPCH bit is reserved as a Configuration Change indicator bit approximately every 20 ms.

42. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein, when the base station changes the configuration parameter values, the base station sets all Configuration Change indicator bits.

43. A method for determining whether to wake up a mobile station in accordance with claim 42, further comprising transmitting using On-Off Keying as with paging indicator QPCH bits, to “

ON”

44. A method for determining whether to wake up a mobile station in accordance with claim 42, wherein the base station sets all Configuration Change indicator bits for approximately 10 minutes after changing the configuration information.

45. A method for determining whether to wake up a mobile station in accordance with claim 31, 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.

46. A method for determining whether to wake up a mobile station in accordance with claim 31, 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.

47. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the mobile station receives the paging indicator bits to determine whether to wake up for the PCH.

48. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein if neither paging indicator bit was “

OFF”

, the mobile station wakes up and receives the PCH.

49. A method for determining whether to wake up a mobile station in accordance with claim 48, wherein the mobile station wakes up and receives the PCH until it receives a page directed to it.

50. A method for determining whether to wake up a mobile station in accordance with claim 48, wherein the mobile station wakes up and receives the PCH until it determines that there are no pages for it in the PCH slot.

51. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the mobile station goes to sleep until the next QPCH bit after receiving the updated configuration parameters

52. A method for determining whether to wake up a mobile station in accordance with claim 31, 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.

53. A method for determining whether to wake up a mobile station in accordance with claim 31, 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.

54. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the first paging indicator for the mobile station is assigned between about 100 milliseconds and 80 milliseconds before the paging channel slot.

55. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the second paging indicator is assigned between about 60 milliseconds and 40 milliseconds before the paging channel slot.

56. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the first paging indicator for the mobile station is assigned between about 80 ms and 60 ms before the paging channel slot.

57. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the second paging indicator is assigned between about 40 ms and 20 ms before the paging channel slot.

58. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the configuration change indicators are scheduled about at 10 ms intervals on the Quick Paging Channel.

59. A method for determining whether to wake up a mobile station in accordance with claim 31, wherein the mobile station operates in the non-slotted mode until the mobile station has received at least one valid configuration message on the new Paging Channel.

60. A method for determining whether to wake up a mobile station in accordance with claim 59, wherein, following the reception of the valid configuration message, the mobile station resumes slotted mode operation.

61. A method for determining whether to wake up a mobile station in accordance with claim 31, 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;

T=N×

2<sup>MAX_—

SLOT_—

CYCLE_—

INDEX</sup>

and N is an integer greater than or equal to 1.

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

(└

(t−

5)/4┘

−

PGSLOT)mod(16×

T)=0,

where t is the System Time in frames, PGSLOT is selected preferably in the range 0 to 2047, and T is the slot cycle length, preferably in units of 1.28 seconds such that

T=2ⁱ,

and i is the slot cycle index.

63. A method for updating configuration parameters at a mobile station, the method comprising the steps of:

storing, at the mobile station, first configuration parameters from a first base station;

performing an idle handoff of the mobile station from the first base station to a second base station, the second base station having second configuration parameters associated therewith;

updating configuration parameters at the mobile station from the first configuration parameters to the second configuration parameters;

performing an idle handoff of the mobile station from the second base station to the first base station; and

receiving at least one configuration change indicator to indicate whether current configuration parameters associated with the first base station are different from the first configuration parameters.

64. A method for updating configuration parameters at a mobile station in accordance with claim 63, the method further comprising the step of receiving the current configuration parameters.

65. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein the second configuration parameters are distinct from the first configuration parameters

66. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein the mobile station determines, after the idle handoff, if configuration information has changed without waking up for a paging channel slot.

67. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein when a mobile station performs an idle handoff, the mobile station receives at least one configuration change indicator bit for the new base station if a timer associated with the new base station has not expired.

68. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein, when a timer for the new base station has expired when the mobile determines that it needs to perform an idle handoff to the new base station, the mobile station does not wake up to receive at least one configuration change indicator bit.

69. A method for updating configuration parameters at a mobile station in accordance with claim 68, wherein the mobile station does not wake up when there is no BCCH and only a PCH.

70. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein the mobile station performs the idle handoff to the base station associated with the new pilot.

71. A method for updating configuration parameters at a mobile station in accordance with claim 70, further comprising the step of determining, at the mobile station, whether its configuration parameter value timer has expired for the new base station.

72. A method for updating configuration parameters at a mobile station in accordance with claim 71, wherein, if the configuration parameter value timer has expired for the new base station, the mobile station wakes up and receives the updated configuration parameters.

73. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein the mobile station does not receive the configuration change indicator

74. A method for updating configuration parameters at a mobile station in accordance with claim 63 wherein, before performing an idle handoff to a base station whose paging channel was recently monitored, a mobile station operating in the slotted mode monitors one or more configuration change indicators on the assigned Quick Paging Channel for the new base station if the mobile station supports the Quick Paging Channel.

75. A method for updating configuration parameters at a mobile station in accordance with claim 74, wherein the new base station supports Quick Paging Channel.

76. A method for updating configuration parameters at a mobile station in accordance with claim 74, wherein the mobile station is not monitoring the Paging Channel.

77. A method for updating configuration parameters at a mobile station in accordance with claim 74, wherein no more than about 600 seconds have elapsed since the mobile station last received a valid message on the new Paging Channel.

78. A method for updating configuration parameters at a mobile station in accordance with claim 63, wherein, while performing an idle handoff, if the mobile station supports the Quick Paging Channel operation and the mobile station determines that the QPCH configuration indicator for the new QPCH is set to “

OFF” and

if no more than about 600 seconds have elapsed since the mobile station last received a valid message on the new Paging Channel, the mobile station does not begin operating in the non-slotted mode after the idle handoff.