METHOD OF CONTROLLING CONGESTION OF MTC DATA IN A MOBILE COMMUNICATION SYSTEM

• US 20130051228A1
• Filed: 04/28/2011
• Published: 02/28/2013
• Est. Priority Date: 04/28/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Taehyeon, Kim, Laeyoung, Stojanovski, Saso, Kim, Hyunsook
• Granted Patent: US 9,042,221 B2
• Time in Patent Office: Days
• US Class Current: 370/230
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/115 using a dedicated packet
• CPC Class Codes: H04L 47/22 Traffic shaping
• CPC Class Codes: H04W 28/0215 based on user or device properties, e.g. MTC-capable devices services for machine-to-machine communication [M2M] or machine type communication [MTC] H04W4/70; wireless resource selection or allocation plan definition based on terminal or device properties H04W72/51
• CPC Class Codes: H04W 28/0289 Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

The present invention relates to a method for controlling traffic congestion of MTC devices in a mobile communication system which provides a machine type communication (MTC) service. The method of the present invention is configured in that a core network node (for example, MME, MSC, SGSN, etc.) performs scheduling and rescheduling procedures on data communication traffic for user equipment (that is, MTC deices) using subscription information and congestion control information of the user equipment; and generates a resultant “recalculated time interval” parameter and transmits the parameter to the user equipment, thereby efficiently distributing the amount of data communication (that is, traffic) concentrated to a specific time slot, and thus controlling traffic congestion or network overload.

Claims

1. A method of controlling congestion in a mobile communication system, the method comprising:

(a) receiving, by a core network node, subscription information on terminals and congestion control information from a registration information server;

(b) receiving, by the core network node, an access request from the terminals;

(c) when the access request is received from the terminals, rescheduling, by the core network node, traffic on the terminals in consideration of the received subscription information and congestion control information and a situation of the core network; and

(d) transmitting, by the core network node, the rescheduled result to the terminals.

2. The method of claim 1, wherein the step (a) further comprises:

scheduling, by the core network node, the traffic on the terminals to be uniformly distributed by using the subscription information on the terminals and the congestion control information.

3. The method of claim 2, wherein in order to control a congestion state of the traffic, the scheduling of the traffic comprises uniformly distributing scheduled traffic among the traffic of the terminals and then uniformly distributing unscheduled traffic among the traffic on the terminals.

4. The method of claim 1, wherein the step (c) comprises:

generating, by the core network node, a result value of the rescheduling that indicates an allowed time of the terminals.

5. The method of claim 4, wherein the result value of the rescheduling is a “

recalculated time interval”

parameter, and a value of the “

recalculated time interval”

parameter is a changed value of an “

Allowed time interval”

parameter during the rescheduling of the traffic.

6. The method of claim 1, wherein the received subscription information and congestion control information comprise at least one of an “

international mobile subscriber identity (IMSI)”

parameter, a “

machine type communication (MTC) device indicator”

parameter, a “

Group id”

parameter, an “

Allowed time interval”

parameter, an “

Allowed data capacity”

parameter, and a “

priority”

parameter.

7. The method of claim 1, wherein the step (b) comprises:

confirming, by the core network node, whether the access request received from the terminals includes an “

MTC device indicator”

; and

when the access request includes the “

MTC device indicator”

, performing, by the core network node, a rescheduling procedure on the traffic on the terminals,

wherein the “

MTC device indicator”

is a parameter indicating that each of the terminals is an MTC device.

8. A method of controlling a congestion state due to traffic of MTC devices in a mobile communication system supporting machine type communication (MTC) service, the method comprising:

in order to uniformly distribute the traffic of the MTC devices, scheduling, by a core network node, the traffic of each of the MTC devices by a time slot unit by using subscription information on each of the MTC devices and congestion control information;

when there is an access request from the MTC devices, rescheduling, by the core network node, the traffic of each of the MTC devices in consideration of a network situation and the scheduled result; and

on the basis of the rescheduled result, when an allowed time that the MTC devices access a core network is changed, notifying, by the core network node, the allowed time to the MTC devices.

9. The method of claim 8, wherein the access request of the MTC devices uses an attach message on a core network, a tracking area update (TAU) request message, or a routing area update (RAU) request message.

10. The method of claim 8, wherein the allowed time is delivered to the MTC devices by using the “

recalculated time interval”

parameter that the core network node generates during the rescheduling of the traffic.

11. The method of claim 8, wherein the notifying of the allowed time uses an attach accept message, a tracking area update (TAU) allow message, or a routing area update (RAU) message.

12. The method of claim 8, wherein the received subscription information and congestion control information comprise at least one of an “

international mobile subscriber identity (IMSI)”

parameter, a “

machine type communication (MTC) device indicator”

parameter, a “

Group id”

parameter, an “

Allowed time interval”

parameter, an “

Allowed data capacity”

parameter, and a “

priority”

parameter.