METHOD AND APPARATUS FOR CONTROLLING TRAFFIC IN WIRELESS COMMUNICATION SYSTEM

• US 20140204754A1
• Filed: 01/17/2014
• Published: 07/24/2014
• Est. Priority Date: 01/18/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Sang-Soo, Cho, Song-Yean, Bae, Beom-Sik, Baek, Young-Kyo, Lim, Han-Na, Won, Sung-Hwan
• Granted Patent: US 10,051,512 B2
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04W 28/0231 based on communication conditions dynamic wireless traffic scheduling definition based on channel quality criteria H04W72/54
• CPC Class Codes: H04W 28/0284 detecting congestion or overload during communication monitoring arrangements H04L43/00
• 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 88/14 Backbone network devices
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 92/24 between backbone network devices

Abstract

Provided is a method for transmitting traffic control information by an Evolved Node B (ENB) in a wireless communication system. The method includes transmitting congestion state information a traffic control node. The congestion state information is used to control traffic for a User Equipment (UE) that is accessing the ENB. And, the congestion state information includes information about a congestion state of the ENB, and is included in a packet header transmitted from the UE.

Claims

1. A method for transmitting traffic control information by an Evolved Node B (ENB) in a wireless communication system, the method comprising:

transmitting congestion state information to a traffic control node,

wherein the congestion state information is used to control traffic for a User Equipment (UE) being served by the ENB, and

wherein the congestion state information includes information about a congestion state of the ENB, and is included in a packet header transmitted from the UE.

2. The method of claim 1, wherein the congestion state information includes at least one of an Identifier (ID) of the ENB, a cell ID, a congestion indication indicating whether congestion occurs, a congestion level indicating a degree of congestion, a load reduction factor indicating an amount of load that needs to be reduced for congestion control, and information about UEs in an active state, which are accessing the ENB.

3. The method of claim 1, wherein the packet header includes one of an extension header of a GPRS Tunneling Protocol-User plane (GTP-U) packet and a Proxy Mobile IPv6 (PMIPv6)-based packet header.

4. A method for transmitting state information of a User Equipment (UE) by a first network node in a wireless communication system, the method comprising:

determining whether one of a connection mode and an idle mode is performed by the UE;

generating state information of the UE based on a result of the determination; and

transmitting the generated state information of the UE to a second network node that performs traffic control.

5. The method of claim 4, wherein the generated state information of the UE includes a mode indicator indicating whether one of the connection mode and the idle mode is performed by the UE, and is included in a Modify Bearer request message.

6. The method of claim 4, wherein the generated state information of the UE is transmitted every time a mode of the UE is changed, or transmitted according to a request of the second network node.

7. The method of claim 4, wherein the generated state information of the UE includes at least one of information indicating whether one of the connection mode and the idle mode is performed by the UE, location information of the UE, congestion state information indicating whether an Evolved Node B (ENB) to which the UE is connected is congested, and a timer value used to predict a mode change time of the UE.

8. The method of claim 4, further comprising:

receiving state information of the UE, which is determined by the second network node, from the second network node;

determining whether the received state information of the UE is identical to the generated state information of the UE; and

transmitting the generated state information of the UE to the second network node based on a result of the determination.

9. A method for determining a state of a User Equipment (UE) by a first network node in a wireless communication system, the method comprising:

receiving state information of the UE from a second network node;

starting a timer, if it is determined that a connection mode is performed by the UE, based on the state information of the UE;

determining whether a packet is received before the timer expires; and

determining that a mode of the UE is switched from the connection mode to an idle mode, based on a result of the determination.

10. The method of claim 9, wherein the state information of the UE includes at least one of information indicating whether the UE is connected to an Evolved Node B (ENB) that is in a congestion state, information indicating whether any one of the connection mode and the idle mode is performed by the UE, and information about a timer value used to start the timer, and is included in a header of a packet transmitted from the UE.

11. An Evolved Node B (ENB) in a wireless communication system, the ENB comprising:

a transmitter for transmitting congestion state information to a traffic control node,

wherein the congestion state information is used to control traffic for a User Equipment (UE) being served by the ENB, and

wherein the congestion state information includes information about a congestion state of the ENB, and is included in a packet header transmitted from the UE.

12. The ENB of claim 11, wherein the congestion state information includes at least one of an Identifier (ID) of the ENB, a cell ID, a congestion indication indicating whether congestion occurs, a congestion level indicating a degree of congestion, a load reduction factor indicating an amount of load that needs to be reduced for congestion control, and information about UEs in an active state, which are accessing the ENB.

13. The ENB of claim 11, wherein the packet header includes one of an extension header of a GPRS Tunneling Protocol-User plane (GTP-U) packet and a Proxy Mobile IPv6 (PMIPv6)-based packet header.

14. A first network node in a wireless communication system, the first network node comprising:

a controller for determining whether one of a connection mode and an idle mode is performed by a User Equipment (UE), and generating state information of the UE based on the determination results; and

a transmitter for transmitting the generated state information of the UE to a second network node that performs traffic control.

15. The first network node of claim 14, wherein the generated state information of the UE includes a mode indicator indicating whether one of the connection mode and the idle mode is performed by the UE, and is included in a Modify Bearer request message.

16. The first network node of claim 14, wherein the generated state information of the UE is transmitted every time a mode of the UE is changed, or transmitted according to a request of the second network node.

17. The first network node of claim 14, wherein the generated state information of the UE includes at least one of information indicating whether one of the connection mode and the idle mode is performed by the UE, location information of the UE, congestion state information indicating whether an Evolved Node B (ENB) to which the UE is connected is congested, and a timer value used to predict a mode change time of the UE.

18. The first network node of claim 14, further comprising:

a receiver for receiving state information of the UE, which is determined by the second network node, from the second network node;

wherein the controller determines whether the received state information of the UE is identical to the generated state information of the UE, and transmits the generated state information of the UE to the second network node based on a result of the determination.

19. A first network node in a wireless communication system, the first network node comprising:

a receiver for receiving state information of a User Equipment (UE) from a second network node;

a controller configured to;

start a timer, if it is determined that a connection mode is performed by the UE, based on the state information of the UE;

determine whether a packet is received before the timer expires; and

determine that a mode of the UE is switched from the connection mode to an idle mode, based on a result of the determination.

20. The first network node of claim 19, wherein the state information of the UE includes at least one of information indicating whether the UE is connected to an Evolved Node B (ENB) that is in a congestion state, information indicating whether any one of the connection mode and the idle mode is performed by the UE, and information about a timer value used to start the timer, and is included in a header of a packet transmitted from the UE.