METHOD AND APPARATUS FOR SUPPORTING IDLE MODE OF MOBILE STATION IN WIRELESS COMMUNICATION SYSTEM

• US 20090303953A1
• Filed: 06/04/2009
• Published: 12/10/2009
• Est. Priority Date: 06/04/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: CHEON, Jung-Hoon, KANG, Hyun-Jeong, SON, Yeong-Moon, SON, Jung-Je, MIN, Chan-Ho, ROH, Won-Il
• Granted Patent: US 8,588,085 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus for supporting an idle mode of a Mobile Station (MS) in a superframe-based wireless communication system are provided. In a method for operating an MS to support an idle mode in a superframe-based wireless communication system, a paging listening interval is determined based on a Broadcast CHannel (BCH) information Transmit (TX) interval. BCH information including paging information is received during the paging listening interval. The inclusion/non-inclusion of a paging advertisement (MOB_PAG-ADV) message is detected based on the BCH information.

Claims

1. A method for operating a Mobile Station (MS) to support an idle mode in a superframe-based wireless communication system, the method comprising:

determining a paging listening interval based on a Broadcast CHannel (BCH) information Transmit (TX) interval;

receiving BCH information including paging information during the paging listening interval; and

detecting the inclusion/non-inclusion of a paging advertisement (MOB_PAG-ADV) message based on the BCH information.

2. The method of claim 1, wherein the BCH information includes at least one of a paging group IDentifier (ID), a paging indicator, a superframe-based Primary Broadcast CHannel (P-BCH) Configuration Change Count (CCC), and a transmission time of MOB_PAG-ADV message and the BCH information is transmitted through a Secondary Broadcast CHannel (S-BCH) transmitted in every superframe, through a P-BCH transmitted over one or more superframes, or through an additional BCH.

3. The method of claim 1, further comprising:

determining if system information should be obtained based on the BCH information,

wherein the determining if the system information should be obtained comprises;

comparing a first paging group IDentifier (ID) obtained in the idle mode and a second paging group ID obtained through the BCH; and

detecting a superframe-based Configuration Change Count (CCC) FOR Primary Broadcast CHannel (P-BCH) obtained through the BCH, if the first paging group ID is identical to the second paging group ID.

4. The method of claim 3, wherein the MS obtains system information used to perform a location update operation, if the first paging group ID is different from the second paging group ID.

5. The method of claim 3, wherein the MS obtains system BCH information if the superframe-based CCC FOR P-BCH obtained through the BCH is different from a stored value.

6. The method of claim 1, wherein

if the MOB_PAG-ADV message is not included in the corresponding superframe during the paging listening interval, the MS transitions to an idle mode;

if the MOB_PAG-ADV message is included in the corresponding superframe during the paging listening interval, the MS determines whether the MS is a paging target;

if the MS is a paging target, the MS performs a network entry operation; and

if the MS is not a paging target, the MS transitions to an idle mode.

7. The method of claim 1, wherein the MS obtains paging cycle information, paging offset information and paging listening interval information when transitioning to the idle mode.

8. The method of claim 7, wherein the paging cycle has a length corresponding to an integer multiple of a superframe-based Primary Broadcast CHannel (P-BCH) information TX interval.

9. The method of claim 7, wherein the paging offset corresponds to the amount of time the MS waits until the starting point of the paging listening interval in the paging cycle, and is set to the starting point of the superframe-based Primary Broadcast CHannel (P-BCH) information TX interval or to 1/n of the superframe-based P-BCH information TX interval.

10. The method of claim 7, wherein the paging listening interval exists in one or more superframes, and has a length of one or more frames.

11. The method of claim 2, wherein the paging indicator includes information indicating the transmission/non-transmission of an MOB_PAG-ADV message in the paging listening interval, and information about the length of the paging listening interval.

12. The method of claim 2, wherein the paging indicator is constituted by a bit of the corresponding paging group or the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe,

if the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe, the paging indicator indicates whether an MOB_PAG-ADV message is transmitted in each frame of a superframe.

13. A method for operating a Base Station (BS) to support an idle mode in a superframe-based wireless communication system, the method comprising:

determining the need to transmit a paging advertisement (MOB_PAG-ADV) message to a Mobile Station (MS);

transmitting Broadcast CHannel (BCH) information, indicating the transmission/non-transmission of the MOB_PAG-ADV message, through at least one or more first frames in a paging listening interval determined based on a BCH information Transmit (TX) interval; and

transmitting the MOB_PAG-ADV message through at least one or more second frames in the paging listening interval.

14. The method of claim 13, wherein the BCH information includes at least one of a paging group IDentifier (ID), a superframe-based Primary Broadcast CHannel (P-BCH) Configuration Change Count (CCC) and a transmission time of MOB_PAG-ADV message.

15. The method of claim 13, wherein the paging indicator includes information indicating the transmission/non-transmission of an MOB_PAG-ADV message in the paging listening interval, and information about the length of the paging listening interval.

16. The method of claim 13, wherein the paging indicator is constituted by a bit of the corresponding paging group or the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe,

if the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe, the paging indicator indicates whether an MOB_PAG-ADV message is transmitted in each frame of a superframe.

17. A method for operating a Mobile Station (MS) to process additional system information and a neighbor Base Station (BS) advertisement message in an idle mode in a wireless communication system, the method comprising:

entering a paging listening interval to receive a system information indicator message;

determining, based on the system information indicator message, whether the additional system information and the neighbor BS advertisement message are changed; and

detecting the Transmit (TX) point of the additional system information and the neighbor BS advertisement message to receive the additional system information and the neighbor BS advertisement message at the detected TX point.

18. The method of claim 17, further comprising:

transiting to a paging unavailable interval if the additional system information and the neighbor BS advertisement message are not changed.

19. The method of claim 17, wherein the system information indicator message includes at least one or more of a Configuration Change Count (CCC) value of an additional system control broadcast message transmitted by a BS, information about the point of transmission of the additional system control broadcast message by the BS, a CCC value of a neighbor BS advertisement message transmitted by the BS, and information of the point of transmission of the neighbor BS advertisement message by the BS.

20. The method of claim 17, further comprising:

receiving the additional system information and the neighbor BS advertisement message and transitioning to a paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging listening interval.

21. The method of claim 17, further comprising:

awaking from the paging listening interval to receive the additional system information and the neighbor BS advertisement message and again transitioning to the paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging unavailable interval.

22. A method for operating a Mobile Station (MS) to process additional system information and a neighbor Base Station (BS) advertisement message in an idle mode in a wireless communication system, the method comprising:

entering a paging listening interval and receiving a Broadcast CHannel (BCH) to determine whether a system information indicator message exists;

receiving the system information indicator message if the system information indicator message exists;

determining, based on the system information indicator message, whether the additional system information and the neighbor BS advertisement message are changed; and

detecting the Transmit (TX) point of the additional system information and the neighbor BS advertisement message to receive the additional system information and the neighbor BS advertisement message at the detected TX point, if the additional system information and the neighbor BS advertisement message are changed.

23. The method of claim 22, wherein the system information indicator message includes at least one or more of a Configuration Change Count (CCC) value of an additional system control broadcast message transmitted by a BS, information about the point of transmission of the additional system control broadcast message by the BS, a CCC value of a neighbor BS advertisement message transmitted by the BS, and information of the point of transmission of the neighbor BS advertisement message by the BS.

24. The method of claim 22, further comprising:

receiving the additional system information and the neighbor BS advertisement message and transitioning to a paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging listening interval.

25. The method of claim 22, further comprising:

awaking from the paging listening interval to receive the additional system information and the neighbor BS advertisement message and again transitioning to the paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging unavailable interval.

26. A method for receiving paging information in a wireless communication system, the method comprising:

decoding, if at least one or more frames for paging transmission in a superframe constituted by a plurality of frames is predefined, MAP information in the frame for the paging transmission; and

detecting the location of paging information in the frame for the paging transmission by using MAP information for the paging information.

27. The method of claim 26, wherein the MAP information for the paging transmission is located in a subframe of the corresponding frame.

28. The method of claim 26, wherein a paging message is not transmitted if MAP information for paging information does not exist in the frame for the paging transmission.

29. A method for receiving paging information in a wireless communication system, the method comprising:

detecting, if a start location for transmission of a paging message in a superframe constituted by a plurality of frames is determined, the message type information and the burst size information of the paging message; and

decoding the paging message at the start location for transmission of the paging message by using by the message type information and the burst size information of the paging message.

30. The method of claim 29, wherein the message type information and the burst size information of the paging message are transmitted through a fixed resource.

31. An apparatus of a Mobile Station (MS) for supporting an idle mode in a superframe-based wireless communication system, the apparatus comprising:

an idle mode controller for determining a paging listening interval based on a Broadcast CHannel (BCH) information Transmit (TX) interval; and

a paging controller for receiving BCH information including paging information during the paging listening interval, and for detecting the inclusion/non-inclusion of a paging advertisement (MOB_PAG-ADV) message based on the BCH information.

32. The apparatus of claim 31, wherein the BCH information includes at least one of a paging group IDentifier (ID), a paging indicator, a superframe-based Primary Broadcast CHannel (P-BCH) Configuration Change Count (CCC) and a transmission time of MOB_PAG-ADV message, and the BCH information is transmitted through a Secondary Broadcast CHannel (S-BCH) transmitted in every superframe, through a P-BCH transmitted over one or more superframes, or through an additional BCH.

33. The apparatus of claim 31, wherein the paging controller determines if system information should be obtained, based on the BCH information, by comparing a first paging group IDentifier (ID) obtained in the idle mode and a second paging group ID obtained through the BCH and detecting a superframe-based Configuration Change Count (CCC) FOR Primary Broadcast CHannel (P-BCH) obtained through the BCH, if the first paging group ID is identical to the second paging group ID.

34. The apparatus of claim 33, wherein the paging controller obtains system information used to perform a location update operation, if the first paging group ID is different from the second paging group ID.

35. The apparatus of claim 33, wherein the paging controller obtains system BCH information if the superframe-based CCC FOR P-BCH obtained through the BCH is different from a stored value.

36. The apparatus of claim 31, wherein

if the MOB_PAG-ADV message is not included in the corresponding superframe during the paging listening interval, the idle mode controller transitions to an idle mode;

if the MOB_PAG-ADV message is included in the corresponding superframe during the paging listening interval, the idle mode controller determines whether the MS is a paging target;

if the MS is a paging target, the idle mode controller performs a network entry operation; and

if the MS is not a paging target, the idle mode controller transitions to an idle mode.

37. The apparatus of claim 31, wherein the idle mode controller obtains at least one of paging cycle information, paging offset information, and paging listening interval information when transitioning to the idle mode.

38. The apparatus of claim 37, wherein the paging cycle has a length corresponding to an integer multiple of a superframe-based Primary Broadcast CHannel (P-BCH) information TX interval.

39. The apparatus of claim 37, wherein the paging offset corresponds to an amount of time of the MS waits until the starting point of the paging listening interval in the paging cycle, and is set to the starting point of the superframe-based Primary Broadcast CHannel (P-BCH) information TX interval or to 1/n of the superframe-based P-BCH information TX interval.

40. The apparatus of claim 37, wherein the paging listening interval exists in one or more superframes, and has a length of one or more frames.

41. The apparatus of claim 32, wherein the paging indicator includes information indicating the transmission/non-transmission of an MOB_PAG-ADV message in the paging listening interval, and information about the length of the paging listening interval.

42. The apparatus of claim 32, wherein the paging indicator is constituted by a bit of the corresponding paging group or the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe,

if the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe, the paging indicator indicates whether an MOB_PAG-ADV message is transmitted in each frame of a superframe.

43. An apparatus of a Base Station (BS) for supporting an idle mode in a superframe-based wireless communication system, comprising a controller for:

determining the need to transmit a paging advertisement (MOB_PAG-ADV) message to a Mobile Station (MS);

transmitting Broadcast CHannel (BCH) information, indicating the transmission/non-transmission of the MOB_PAG-ADV message, through at least one or more first frames in a paging listening interval determined based on a BCH information Transmit (TX) interval; and

transmitting the MOB_PAG-ADV message through at least one or more second frames in the paging listening interval.

44. The apparatus of claim 43, wherein the BCH information includes at least one of a paging group IDentifier (ID) and a superframe-based Primary Broadcast CHannel (P-BCH) Configuration Change Count (CCC).

45. The apparatus of claim 43, wherein the paging indicator includes information indicating the transmission/non-transmission of an MOB_PAG-ADV message in the paging listening interval, and information about the length of the paging listening interval.

46. The apparatus of claim 43, wherein the paging indicator is constituted by a bit of the corresponding paging group or the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe,

if the paging indicator is constituted by a bitmap of the same length as the number of frames constituting a superframe, the paging indicator indicates whether an MOB_PAG-ADV message is transmitted in each frame of a superframe.

47. An apparatus of a Mobile Station (MS) for processing additional system information and a neighbor Base Station (BS) advertisement message in an idle mode in a wireless communication system, comprising a controller for:

entering a paging listening interval to receive a system information indicator message;

determining, based on the system information indicator message, whether the additional system information and the neighbor BS advertisement message are changed; and

detecting the Transmit (TX) point of the additional system information and the neighbor BS advertisement message to receive the additional system information and the neighbor BS advertisement message at the detected TX point.

48. The apparatus of claim 47, wherein the controller transitions to a paging unavailable interval if the additional system information and the neighbor BS advertisement message are not changed.

49. The apparatus of claim 47, wherein the system information indicator message includes at least one or more of a Configuration Change Count (CCC) value of an additional system control broadcast message transmitted by a BS, information about the point of transmission of the additional system control broadcast message by the BS, a CCC value of a neighbor BS advertisement message transmitted by the BS, and information of the point of transmission of the neighbor BS advertisement message by the BS.

50. The apparatus of claim 47, wherein the controller receives the additional system information and the neighbor BS advertisement message and transitions to a paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging listening interval.

51. The apparatus of claim 47, wherein the controller awakes from the paging listening interval to receive the additional system information and the neighbor BS advertisement message and again transitions to the paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging unavailable interval.

52. An apparatus of a Mobile Station (MS) for processing additional system information and a neighbor Base Station (BS) advertisement message in an idle mode in a wireless communication system, comprising a controller for:

entering a paging listening interval and receiving a Broadcast CHannel (BCH) to determine whether a system information indicator message exists;

receiving the system information indicator message if the system information indicator message exists;

determining, based on the system information indicator message, whether the additional system information and the neighbor BS advertisement message are changed; and

detecting the Transmit (TX) point of the additional system information and the neighbor BS advertisement message to receive the additional system information and the neighbor BS advertisement message at the detected TX point, if the additional system information and the neighbor BS advertisement message are changed.

53. The apparatus of claim 52, wherein the system information indicator message includes at least one or more of a Configuration Change Count (CCC) value of an additional system control broadcast message transmitted by a BS, information about the point of transmission of the additional system control broadcast message by the BS, a CCC value of a neighbor BS advertisement message transmitted by the BS, and information of the point of transmission of the neighbor BS advertisement message by the BS.

54. The apparatus of claim 52, wherein the controller receives the additional system information and the neighbor BS advertisement message and transitions to a paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging listening interval.

55. The apparatus of claim 52, wherein the controller awakes from the paging listening interval to receive the additional system information and the neighbor BS advertisement message and again transitions to the paging unavailable interval, if the TX point of the additional system information and the neighbor BS advertisement message corresponds to the paging unavailable interval.