METHOD FOR TRANSMITTING AND RECEIVING PAGING INFORMATION IN A BROADBAND WIRELESS ACCESS SYSTEM

• US 20110051668A1
• Filed: 06/03/2009
• Published: 03/03/2011
• Est. Priority Date: 06/03/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Jong Young, Cho, Han Gyu, Choi, Jin Soo, Park, Hyung Ho, Lee, Eun Jong, Chung, Jae Hoon, Sung, Doo Hyun, Park, Kyu Jin
• Granted Patent: US 8,660,064 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for efficiently transmitting and receiving a paging message and system information from and in a mobile station of a broadband wireless access system is disclosed. A method for receiving a paging message in a mobile station comprise receiving paging information from a serving base station, the paging information including paging sub group identifier (paging sub_group ID) indicating a paging sub group to which the mobile station belongs; and receiving the paging message for a predetermined paging interval of the paging sub group, wherein the paging sub group is determined separately from a paging group and a geographical location determining the paging group, and is maintained while the mobile station is being operated in an idle mode.

Claims

1. A method for receiving a paging message in a mobile station, the method comprising:

receiving paging information from a serving base station, the paging information including paging sub group identifier (paging_sub_group ID) indicating a paging sub group to which the mobile station belongs; and

receiving the paging message for a predetermined paging interval of the paging sub group.

2. The method of claim 1, wherein the paging interval is determined in a subframe unit.

3. The method of claim 1, further comprising receiving paging indication information indicating whether a paging message of at least one paging sub group is transmitted, wherein the step of receiving the paging message is performed when the paging indication information indicates the paging sub group to which the mobile station belongs.

4. The method of claim 3, wherein the paging indication information includes at least one of bits indicating whether the paging message of at least one paging sub group is transmitted, and if the paging indication information is transmitted twice or more within the paging cycle, the paging indication information is transmitted at different superframes.

5. The method of claim 4, wherein the paging indication information is transmitted at a first subframe of a superframe where a paging cycle starts, through any one of a superframe header (SFH), a broadcast channel (BCH) included in the superframe header, a data region of the first subframe, and a sub-packet of a secondary superframe header.

6. The method of claim 4, wherein the paging interval is a subframe after predetermined offset determined in accordance with the paging sub group from the subframe through which the paging indication information is transmitted.

7. The method of claim 4, wherein the bits respectively indicate whether the paging message of one paging sub group is transmitted, and if the paging indication information includes bits of all paging sub groups belonging to a predetermined paging group, the paging information is broadcasted to the mobile station through the superframe header.

8. The method of claim 1, wherein the paging message further includes a system information update indication (SIUI) field, the method further comprising updating system information if the SIUI field indicates update of the system information.

9. The method of claim 8, wherein the step of updating system information includes acquiring system information by decoding a superframe header (SFH) received after a superframe where the paging message including the system information update indication field is transmitted

10. The method of claim 2, wherein the paging message is transmitted to the mobile station through a downlink resource indicated by predetermined paging message control information included in a sub-map of a subframe corresponding to the paging interval, the predetermined paging message control information being CRC masked by predetermined paging connection identifier (CID) for a specific mobile station of an idle mode, and the mobile station performs blind decoding for the predetermined paging message control information using its paging CID.

11. The method of claim 10, wherein the predetermined paging message control information has a predetermined size in a predetermined location of the sub-map.

12. A method for transmitting a paging message from a base station to a mobile station, the method comprising:

receiving a deregistration request message from the mobile station;

transmitting a deregistration command message including paging information to the mobile station, the paging information including paging sub group identifier (paging_sub_group ID) indicating a paging sub group to which the mobile station belongs; and

transmitting a paging message to the mobile station for a predetermined paging interval of the paging sub group,

wherein the paging sub group is determined separately from a paging group and a geographical location determining the paging group, and is maintained while the mobile station is being operated in an idle mode.

13. The method of claim 12, wherein the paging interval is determined in a subframe unit.

14. The method of claim 13, further comprising:

receiving a paging indication message of the mobile station from a paging controller; and

transmitting paging indication information to the mobile station, the paging indication information indicating whether a paging message of a paging sub group to which the mobile station belongs is transmitted.

15. The method of claim 14, wherein the paging indication information is transmitted at a first subframe of a superframe where a paging cycle starts, through any one of a superframe header (SFH), a broadcast channel (BCH) included in the superframe header, a data region of the first subframe, and a subpacket of a secondary superframe header.

16. The method of claim 13, wherein the step of transmitting a paging message is performed at a subframe after predetermined offset previously determined for a paging sub group to which the mobile station belongs, from a subframe where the paging indication information is transmitted.

17. A method for receiving a paging message in a mobile station of an idle mode, the method comprising:

monitoring the paging message for a first paging cycle; and

increasing the first paging cycle by a predetermined value if the paging message is not received for the first paging cycle.

18. The method of claim 17, wherein the step of monitoring the paging message and the step of increasing the first paging cycle are repeated as much as a number of times, which is previously determined.

19. The method of claim 18, wherein the step of increasing the first paging cycle is performed until the first paging cycle becomes equal to a maximum paging cycle which is previously determined.