Method of controlling idle mode in broadband wireless access system

• US 7,917,183 B2
• Filed: 06/25/2005
• Issued: 03/29/2011
• 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 Joon
• Primary Examiner(s): Addy; Anthony S
• Application Number:
  US11/571,139
• Publication Number:
  US 20070243910A1
• Time in Patent Office: 2,103 Days
• Field of Search: 455/343.2, 455/343.3, 455/343.4, 455/343.5, 455/432.1, 455/435.1, 455/436, 455/440, 455442-444, 455/448, 455/458, 455/522, 455/524, 455/525, 455/526, 455/574, 455/515, 370/311, 370/312, 370/318, 370/329, 370/330, 370/337, 370/338, 340/7.1, 340/7.2, 340/7.21, 340/7.28, 340/7.32, 340/7.33, 340/7.34, 340/7.35
• 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 in a broadband wireless access system, the method comprising:

receiving, at the base station, a message from a mobile subscriber station, the message used for requesting a transition to the idle mode, wherein the base station belongs to at least two paging groups, each of the at least two paging groups having a paging cycle and a paging offset;

transmitting, to the mobile subscriber station, paging information including first paging cycles and first paging offsets of the at least two paging groups;

transmitting, to the mobile subscriber station, first paging messages, wherein the first two paging messages are transmitted according to the first paging cycles and the first paging offsets of the at least two paging groups;

transmitting, to the mobile subscriber station, second paging messages including second paging cycles and second paging offsets of the at least two paging groups, and further including an action code instructing the mobile subscriber station to change paging cycles and paging offsets of the mobile subscriber station to the second paging cycles and the second paging offsets; and

transmitting, to the mobile subscriber station, third paging messages according to the second paging cycles and the second paging offsets of the at least two paging groups.

2. The method of claim 1, further comprising 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:

notifying the different base stations that downlink traffic to be transmitted to the mobile subscriber station has been generated if the downlink traffic 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 is transmitted via an idle mode response message.

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

receiving, from a base station belonging to at least two paging groups, paging information including first paging cycles and first paging offsets of the at least two paging groups, wherein each of the at least two paging groups has a paging cycle and a paging offset;

receiving, from the base station, first paging messages according to the first paging cycles and the first paging offsets of the at least two paging groups;

receiving, from a base station, second paging messages including second paging cycles and second paging offsets of the at least two paging groups, and further including an action code instructing the mobile subscriber station to change paging cycles and paging offsets of the mobile subscriber station to the second paging cycles and the second paging offsets; and

receiving, from the base station, third paging messages according to the second paging cycles and the second paging offsets of the at least two paging groups.

6. The method of claim 5, further comprising:

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

receiving a fourth paging message according to only paging information of the specific one of the at least two paging groups.

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