Local breakout session establishment method and apparatus in wireless communication system

• US 9,185,545 B2
• Filed: 11/24/2009
• Issued: 11/10/2015
• Est. Priority Date: 11/25/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yeoum, Tae Sun, Lim, Chae Gwon, Choi, Sung Ho, Bae, Eun Hui
• Primary Examiner(s): FOUD, HICHAM B
• Application Number:
  US13/131,169
• Publication Number:
  US 20110292896A1
• Time in Patent Office: 2,177 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 2212/00 Encapsulation of packets
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A local breakout session establishment method and apparatus in an Evolved Packet System (EPS) is provided for an HeNB to efficiently route local IP packets. A local breakout service method for a wireless communication system including a macro evolved Node B (eNB) and a Home eNB (HeNB) having a Packet Data Network (PDN) gateway (PGW) and a serving gateway (SGW) includes selecting, at a Mobility Management Entity (MME), the PGW of the HeNB and transmitting a Create Default Bearer Request message to the HeNB in response to a local breakout service request message including a local breakout Access Point Name (APN); assigning, at the HeNB, an IP address to a user equipment transmitted the local breakout service request message and transmitting a Create Default Bearer Response message including a Tunnel Endpoint Identifier (TEID) to the MME; transmitting a Bearer Setup Request message including the TEID from the MME to the HeNB; and configuring, at the HeNB, a radio bearer with the user equipment and routing data transmitted by the user equipment through the radio bearer to an Internet Protocol (IP) network by means of the internal PGW.

Claims

1. A method of providing a local breakout service of a mobility management entity (MME) in a wireless communication system, comprising:

receiving a connection request message;

transmitting a location update message including an address of a home evolved Node B (HeNB);

determining whether local breakout access point name (APN) information is contained in the connection request message;

selecting a packet data network (PDN) gateway (PGW) corresponding to the HeNB according to the address of the HeNB provided by a home subscriber server (HSS) if the local breakout APN information is contained in the connection request message; and

transmitting a create default bearer request message to the selected PGW to create a default bearer.

2. The method of claim 1, further comprising:

receiving a create default bearer response message including an internet protocol (IP) address of a user equipment assigned by the selected PGW, and transmitting a bearer setup request message.

3. The method of claim 2, wherein the create default bearer response message and the bearer setup request message include a tunnel endpoint identifier (TEID).

4. The method of claim 1, further comprising:

receiving, if an attach request message is received from a user equipment, the attach request message including a local breakout indicator,

wherein the address of the selected PGW in a user equipment context for use in the local breakout service is stored as a gateway address by the HSS.

5. The method of claim 1, wherein the connection request message is a PDN connectivity request message or an attach request message including the local breakout APN.

6. The method of claim 5, wherein the local breakout APN has a fixed value for all user equipments and predefined between a user equipment and network.

7. The method of claim 6, wherein the local breakout APN is formatted as “

local,”

“

local.<

mobile network code(MNC)>

.<

mobile country code(MCC)>

,” and

“

<

home eNB id>

.<

MNC>

.<

national numbering convention(NNC)>

,”

or by inserting a home local breakout flag into the PDN request message, to support HeNB local breakout.

8. A mobility management entity (MME) for providing a local breakout service in a wireless communication system, the MME comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to receive a connection request message, transmit a location update message including an address of a home evolved Node B (HeNB), determine whether local breakout access point name (APN) information is contained in the connection request message, select a packet data network (PDN) gateway (PGW) corresponding to the HeNB according to the address of the HeNB provided by a home subscriber server (HSS) if the local breakout APN information is contained in the connection request message, and transmit a create default bearer request message to the selected PGW to create a default bearer.

9. The MME of claim 8, wherein an address of the selected PGW in a user equipment context for use in local breakout service is stored by the HSS.

10. The MME of claim 8, wherein the controller is configured to receive a create default bearer response message including an internet protocol (IP) address of a user equipment assigned by the selected PGW, and transmit a bearer setup request message.

11. The MME of claim 10, wherein the create default bearer response message and the bearer setup request message include a tunnel endpoint identifier (TEID).

12. The MME of claim 8, wherein the connection request message is a PDN connectivity request message or an attach request message including the local breakout APN.

13. The MME of claim 12, wherein the local breakout APN has a fixed value for all user equipments and predefined between a user equipment and network.

14. The MME of claim 12, wherein the local breakout APN is formatted as “

local,”

“

local.<

mobile network code(MNC)>

.<

mobile country code(MCC)>

,” and

“

<

home eNB id>

.<

MNC>

.<

national numbering convention(NCC)>

,”

or by inserting a home local breakout flag into the PDN request message, to support HeNB local breakout.

15. A method of providing a local breakout service of home evolved Node B (HeNB) in a wireless communication system, comprising:

receiving a create default bearer request message from a mobility management entity (MME) if local breakout access point name (APN) information is contained in a connection request message;

assigning an internet protocol (IP) address to a user equipment which transmitted the connection request message; and

configuring a radio bearer with the user equipment and routing data transmitted by the user equipment through the radio bearer to an IP network by means of a packet data network (PDN) gateway (PGW) corresponding to a home evolved Node B (HeNB), selected by the MME, provided by a home subscriber server (HSS),

wherein the PGW corresponding to the HeNB is selected according to an address of the HeNB, and

wherein the address of the HeNB is included in a location update message which is transmitted from the MME to the HSS.

16. The method of claim 15, further comprising:

transmitting, if an attach request message is received from the user equipment, the attach request message including a local breakout indicator to the MME.

17. The method of claim 15, wherein the connection request message is a PDN connectivity request message or an attach request message including the local breakout APN.

18. The method of claim 17, wherein the local breakout APN has a fixed value for all user equipments and predefined between the user equipment and the network.

19. The method of claim 18, wherein the local breakout APN is formatted as “

local,”

“

local.<

mobile network code(MNC)>

.<

mobile country code(MCC)>

,” and

“

<

home eNB id>

.<

MNC>

.<

national numbering convention(NNC)>

,”

or by inserting a home local breakout flag into the PDN request message, to support HeNB local breakout.

20. The method of claim 15, further comprising:

transmitting a create default bearer response to the MME; and

receiving a bearer setup request message from the MME to configure a radio bearer with the user equipment.

21. The method of claim 20, wherein a create default bearer response message and a bearer setup request message include a tunnel endpoint identifier (TEID).

22. A home evolved Node B (HeNB) for providing a local breakout service in a wireless communication system, the HeNB comprising:

a transceiver configured to transmit and receive a signal;

a controller configured to receive a create default bearer request message from a mobility management entity (MME) if local breakout access point name (APN) information is contained in a connection request message, assign an internet protocol (IP) address to a user equipment which transmitted the connection request message, configure a radio bearer with the user equipment, and route data transmitted by the user equipment through the radio bearer to an IP network by means of a packet data network (PDN) gateway (PGW) corresponding to a HeNB, selected by the MME, provided by a home subscriber server (HSS),

wherein the PGW corresponding to the HeNB is selected according to an address of the HeNB, and

wherein the address of the HeNB is included in a location update message which is transmitted from the MME to the HSS.

23. The HeNB of claim 22, wherein the controller is configured to transmit, if an attach request message is received from the user equipment, the attach request message including a local breakout indicator to the MME.

24. The HeNB of claim 22, wherein the connection request message is a PDN connectivity request message or an attach request message including the local breakout APN.

25. The HeNB of claim 24, wherein the local breakout APN has a fixed value for all user equipments and predefined between the user equipment and the network.

26. The HeNB of claim 25, wherein the local breakout APN is as “

local,”

“

local.<

mobile network code(MNC)>

.<

mobile country code(MCC)>

,” and

“

<

HeNB id>

.<

MNC>

.<

national numbering convention(NNC)>

,”

or by inserting a home local breakout flag into the PDN request message, to support HeNB local breakout.

27. The HeNB of claim 22, wherein the controller is configured to transmit a create default bearer response to the MME, and receive a bearer setup request message from the MME to configure a radio bearer with the user equipment.

28. The HeNB of claim 27, wherein a create default bearer response message and a bearer setup request message include a tunnel endpoint identifier (TEID).