METHOD AND DEVICE FOR OPERATING IN IDLE MODE

• US 20130039243A1
• Filed: 08/08/2012
• Published: 02/14/2013
• Est. Priority Date: 08/12/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: PARK, Gi Won, YUK, Young Soo, KIM, Jeong Ki
• Granted Patent: US 9,301,254 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• 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: Y02D 30/70 in wireless communication networks

Abstract

A method and device for operating in an idle mode for Machine To Machine (M2M) communication are provided. A M2M device receives a paging message from a base station. The paging message includes a M2M group identifier that identifies a M2M group to which the M2M device belongs. The M2M device monitors an uplink resource allocation beginning from an offset during a monitoring duration.

Claims

1. A method for operating in an idle mode for Machine To Machine (M2M) communication, comprising:

entering, by a M2M device, into an idle mode;

receiving, by the M2M device in the idle mode, a paging message from a base station, the paging message includes a M2M group identifier, a network access type, a resource offset and a monitoring duration,

the M2M group identifier that identifies a M2M group to which the M2M device belongs,

the network access type indicating a resource allocation for a ranging request,

the resource offset indicating an offset that the M2M device starts to monitor an uplink resource assignment,

the monitoring duration indicating a time duration that the M2M device monitors the uplink resource assignment; and

monitoring, by the M2M device, the uplink resource allocation beginning from the offset during the monitoring duration.

2. The method of claim 1, further comprising:

transmitting, by the M2M device, the ranging request to the base station by using the uplink resource assignment when the M2M device succeeds to receive the uplink resource assignment before an expiration of the monitoring duration.

3. The method of claim 1, further comprising:

transmitting, by the M2M device, a ranging code to the base station when the M2M device fails to receive the uplink resource assignment until an expiration of the time duration.

4. The method of claim 1, wherein the paging message further includes an action code indicating that the M2M device performs a network reentry or a location update.

5. The method of claim 1, wherein a cyclic redundancy check (CRC) of the uplink resource assignment is masked with a part of a M2M identifier that identifies the M2M device.

6. The method of claim 5, wherein the uplink resource assignment includes a remaining part of the M2M identifier.

7. The method of claim 6, wherein the M2M identifier includes a fixed M2M deregistration identifier (FMDID) that is a 16-bit identifier that uniquely identifies the M2M device in domain of the base station, and

wherein the FMDID is assigned to the M2M device by the base station during an idle mode entry and is released during a network reentry.

8. A wireless device configured for operating in an idle mode for Machine To Machine (M2M) communication, comprising:

a radio frequency unit for receiving and transmitting a radio signal; and

a processor operatively coupled with the radio frequency unit and configured to;

enter into an idle mode;

receive, at the idle mode, a paging message from a base station, the paging message includes a M2M group identifier, a network access type, a resource offset and a monitoring duration,

the M2M group identifier that identifies a M2M group to which the wireless device belongs,

the network access type indicating a resource allocation for a ranging request,

the resource offset indicating an offset that the wireless device starts to monitor an uplink resource assignment,

the monitoring duration indicating a time duration that the wireless device monitors the uplink resource assignment; and

monitor the uplink resource allocation beginning from the offset during the monitoring duration.

9. The wireless device of claim 8, wherein the processor is configured to:

instruct the radio frequency unit to transmit the ranging request to the base station by using the uplink resource assignment when the processor succeeds to receive the uplink resource assignment before an expiration of the monitoring duration.

10. The wireless device of claim 8, the processor is configured to:

instruct the radio frequency unit to transmit a ranging code to the base station when the processor fails to receive the uplink resource assignment until an expiration of the time duration.

11. The wireless device of claim 8, wherein the paging message further includes an action code indicating that the wireless device performs a network reentry or a location update.

12. The wireless device of claim 8, wherein a cyclic redundancy check (CRC) of the uplink resource assignment is masked with a part of a M2M identifier that identifies the wireless device.

13. The wireless device of claim 12, wherein the uplink resource assignment includes a remaining part of the M2M identifier.

14. The wireless device of claim 13, wherein the M2M identifier includes a fixed M2M deregistration identifier (FMDID) that is a 16-bit identifier that uniquely identifies the wireless device in domain of the base station, and

wherein the FMDID is assigned to the wireless device by the base station during an idle mode entry and is released during a network reentry.