Method and apparatus for supporting idle mode of mobile station in wireless communication system

• US 8,588,085 B2
• Filed: 06/04/2009
• Issued: 11/19/2013
• Est. Priority Date: 06/04/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kang, Hyun-Jeong, Son, Yeong-Moon, Son, Jung-Je, Cheon, Jung-Hoon, Min, Chan-Ho, Roh, Won-Il
• Primary Examiner(s): Jung, Min
• Application Number:
  US12/478,649
• Publication Number:
  US 20090303953A1
• Time in Patent Office: 1,629 Days
• Field of Search: None
• US Class Current: 370/252
• 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:

receiving a first message comprising a paging group Identifier (ID) during a paging listening interval;

receiving a second message indicating whether to perform one of a location update process and a network entry process;

if the second message indicates that the MS is a paging target, performing one of the location update process and the network entry process based on information in the second message; and

returning to a paging unavailable interval if the second message does not indicate that the MS is a paging target.

2. The method of claim 1, wherein the first message includes information indicating whether the second message is transmitted in the paging listening interval.

3. The method of claim 1, further comprising:

comparing a first paging group ID of a previous paging group and a second paging group ID obtained through the first message; and

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

4. The method of claim 3, further comprising:

obtaining 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, further comprising:

obtaining 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, further comprising:

obtaining paging cycle information, paging offset information and paging listening interval information when returning to the paging unavailable interval.

7. The method of claim 6, wherein the paging cycle has a length corresponding to an integer multiple of a superframe-based Primary Broadcast CHannel (P-BCH) information TX interval.

8. The method of claim 6, 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.

9. The method of claim 6, wherein the paging listening interval is one or more superframes.

10. The method of claim 1, further comprising:

determining whether a current paging group is identical to a previous paging group through the first message; and

performing a location update if the current paging group is not identical to the previous paging group.

11. The method of claim 1, wherein the first message is transmitted in one of a next subframe and a same subframe as a superframe header including a P-BCH.

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

transmitting a first message comprising a paging group Identifier (ID) in a paging listening interval; and

transmitting a second message indicating whether to perform one of a location update process and a network entry process in the paging listening interval,

wherein the first message includes information indicating whether the second message is transmitted in the paging listening interval.

13. The method of claim 12, wherein the first message is transmitted in one of a next subframe and a same subframe as a superframe header including a P-BCH.

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

a paging controller for receiving a first message comprising a paging group Identifier (ID) during the paging listening interval, and for receiving a second message indicating whether to perform one of a location update process and a network entry process; and

an idle mode controller for, if the second message indicates that the MS is a paging target, performing one of the location update process and the network entry process based on information in the second message, and for returning to a paging unavailable interval if the second message does not indicate that the MS is a paging target.

15. The apparatus of claim 14, wherein the first message includes information indicating whether the second message is transmitted in the paging listening interval.

16. The apparatus of claim 14, wherein the paging controller compares a first paging group ID of the previous paging group and a second paging group ID obtained through the first message and detects a superframe-based Configuration Change Count (CCC) for Primary Broadcast CHannel (P-BCH) obtained through a Broadcast CHannel (BCH), if the first paging group ID is identical to the second paging group ID.

17. The apparatus of claim 16, 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.

18. The apparatus of claim 16, 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.

19. The apparatus of claim 14, wherein the idle mode controller obtains at least one of paging cycle information, paging offset information, and paging listening interval information when returning to the paging unavailable interval.

20. The apparatus of claim 19, wherein the paging cycle has a length corresponding to an integer multiple of a superframe-based Primary Broadcast CHannel (P-BCH) information TX interval.

21. The apparatus of claim 19, 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.

22. The apparatus of claim 19, wherein the paging listening interval is one or more superframes.

23. The apparatus of claim 14, further comprising:

a paging controller for determining whether current paging group is identical to a previous paging group through the first message, and for performing a location update if the current paging group is not identical to the previous paging group.

24. The apparatus of claim 14, wherein the first message is transmitted in one of a next subframe and a same subframe as a superframe header including a P-BCH.

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

a controller for

transmitting a first message comprising a paging group Identifier (ID) in a paging listening interval; and

for

transmitting a second message indicating whether to perform one of a location update process and a network entry process in the paging listening interval.

26. The apparatus of claim 25, wherein the first message includes information indicating whether the second message is transmitted in the paging listening interval.

27. The apparatus of claim 25, wherein the first message is transmitted in one of a next subframe and a same subframe as a superframe header including a P-BCH.

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

receiving a first message comprising a paging group Identifier (ID) during a paging listening interval;

receiving a second message including information used to determine whether to perform one of a location update process, a network entry process, and a process of returning to a paging unavailable interval; and

performing one of the location update process, the network entry process, and a process of returning to the paging unavailable interval.