Method of Controlling Idle Mode in Broadband Wireless Access System

• US 20070243910A1
• Filed: 06/25/2005
• Published: 10/18/2007
• Est. Priority Date: 06/25/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ryu, Gi Seon, Kim, Beom
• Granted Patent: US 7,917,183 B2
• Time in Patent Office: Days
• US Class Current: 455/574
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of controlling an idle mode in a broadband wireless access system is disclosed, in which paging information is allocated to a mobile subscriber station to enter an idle mode via a base station belonging to at least two paging groups and in which the idle mode is efficiently controlled by improving a method of changing paging information of a mobile subscriber station in idle mode. The present invention includes the steps of receiving a message requesting a transition to the idle mode from a mobile subscriber station, transmitting paging information for the entire paging groups of the base station to the mobile subscriber station, and transmitting a paging message to the mobile subscriber station according to the paging information of each of the paging groups to which the base station belongs.

Claims

1. A method of controlling an idle mode by a base station belonging to at least two paging groups in a broadband wireless access system, comprising the steps of:

receiving a message requesting a transition to the idle mode from a mobile subscriber station;

transmitting paging information for the entire paging groups of the base station to the mobile subscriber station; and

transmitting paging messages to the mobile subscriber station according to the paging information of each of the paging groups to which the base station belongs.

2. The method of claim 1, further comprising the step of notifying different base stations belonging to the at least two paging groups that the mobile subscriber station has entered the idle mode.

3. The method of claim 2, further comprising the steps of:

if a downlink traffic to be transmitted to the mobile subscriber station is generated, notifying the different base stations belonging to the at least two paging groups that the downlink traffic to be transmitted to the mobile subscriber station is generated; and

instructing the mobile subscriber station to terminate the idle mode and to re-enter a network.

4. The method of claim 1, wherein the paging information includes a paging group ID, a paging cycle and a paging offset for each of the entire paging groups.

5. The method of claim 4, wherein the paging information is transmitted via an idle mode response message.

6. A method of controlling an idle mode by a base station belonging to at least two paging groups in a broadband wireless access system, comprising the steps of:

receiving a message requesting a transition to the idle mode from a mobile subscriber station;

comparing paging loads of the at least two paging groups to each other;

transmitting paging information for at least one of the at least two paging groups to the mobile subscriber station according to a result of the comparing step; and

transmitting a paging message to the mobile subscriber station according to the paging information of the at least one paging group.

7. The method of claim 6, wherein the paging information of the at least one paging group is transmitted to the mobile subscriber station by taking a small one of the paging loads as a reference.

8. The method of claim 7, wherein the paging information of the paging group having the smallest paging load is transmitted to the mobile subscriber station.

9. The method of claim 6, wherein the paging information includes a paging group ID, a paging cycle and a paging offset for each of the at least of paging group.

10. The method of claim 9, wherein the paging information is transmitted via an idle mode response message.

11. A method of transmitting paging information from a base station to a mobile subscriber station in a broadband wireless access system, comprising the steps of:

transmitting a first paging information to the mobile subscriber station requesting to enter an idle mode;

transmitting a second paging information changed via a paging message transmitted according to the first paging information; and

transmitting a paging message according to the second paging information.

12. The method of claim 11, further comprising the step of notifying different base stations of a paging group, to which the base station belongs, that the paging information for the mobile subscriber station is changed into the second paging information.

13. The method of claim 12, further comprising the step of transmitting paging message according to the second paging information to the mobile subscriber station from the different base stations.

14. The method of claim 11, wherein the paging information includes a paging group ID, a paging cycle and a paging offset.

15. The method of claim 14, wherein the paging information is transmitted via an idle mode response message.

16. A method of controlling an idle mode in a mobile subscriber station of a broadband wireless access system, an idle mode control method comprising the steps of:

receiving paging information for at least two paging groups to which a base station belongs from the base station belonging to the at least two paging groups;

receiving at least two paging messages transmitted from the base station according to the paging information of each of the paging groups to which the base station belongs; and

performing actions instructed by the at least two paging messages.

17. The method of claim 16, further comprising the steps of:

detecting that the mobile subscriber station has moved to an area of a different base station belonging to a specific one of the at least two paging groups only; and

receiving the paging message according to the paging information of the specific paging group only.

18. The method of claim 16, wherein the paging information includes a paging group ID, a paging cycle and a paging offset for each of paging groups.

19. The method of claim 18, wherein the paging information is transmitted via an idle mode response message.

20. A method of controlling an idle mode in a mobile subscriber station of a broadband wireless access system, comprising the steps of:

requesting a transition to the idle mode to a base station;

receiving a first paging information from the base station;

receiving a second paging information changed via a paging message transmitted according to the first paging information;

receiving a paging message according to the second paging information; and

performing an action instructed by the paging message.

21. The method of claim 20, wherein each of the first and second paging informations includes a paging group ID, a paging cycle and a paging offset.

22. The method of claim 21, wherein the first paging information is transmitted via an idle mode response message.