LOCAL BREAKOUT SESSION ESTABLISHMENT METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM

• US 20110292896A1
• Filed: 11/24/2009
• Published: 12/01/2011
• Est. Priority Date: 11/25/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yeuom, Tae Sun, Lim, Chae Gwon, Choi, Sung Ho, Bae, Eun Hui
• Granted Patent: US 9,185,545 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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 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), comprising:

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.

2. The local breakout service method of claim 1, wherein selecting the internal PGW of the HeNB comprises selecting an address of the HeNB transmitted by a Home Subscriber Server (HSS) as the PGW address.

3. The local breakout service method of claim 2, further comprising:

transmitting, when an Attach Request message is received from the user equipment, the Attach Request message including a local breakout indicator from the HeNB to the MME;

transmitting a Location Update message including the address of the HeNB from the MME to the HSS; and

storing, at the HSS, the address of the HeNB in a user equipment context for use in local breakout service as a gateway address and registering a location update of the user equipment.

4. The local breakout service method of claim 3, wherein the local breakout service request message is a PDN Connectivity Request message or an Attach Request message including the local breakout APN.

5. The local breakout service method of claim 4, wherein the local breakout APN has a fixed value for all user equipments and predefined between the user equipment and network.

6. The local breakout service method of claim 5, wherein the local breakout APN is formatted in forms of ‘

local’

, ‘

local.<

mnc>

.<

mcc>

’ and

‘

<

home eNB id>

.<

mnc>

.<

nnc>

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

7. A local breakout service apparatus for a wireless communication system, comprising:

a user equipment which transmits a local breakout service request message including a local breakout Access Point Name (APN);

a home evolved Node B (HeNB) which includes a Packet Data Network (PDN) Gateway (PGW) and a Serving Gateway (SGW), assigns an IP address to the user equipment when receiving a Create Default Bearer Request message, transmits a Create Default Bearer Response message including a Tunnel Endpoint Identifier (TEID) in response to the Create Default Bearer Request message, configures a radio bearer with the user equipment when a Bearer Setup Request message is received, and routes data received through the radio bearer by means of the PGW; and

a Mobility Management Entity (MME) which selects an address of the PGW of the HeNB when the local breakout service request message is received, transmits the Create Default Bearer Request message to the HeNB, and transmits the Bearer Setup Request message including the TEID to the HeNB.

8. The local breakout service apparatus of claim 7, further comprising:

a Home Subscriber Server (HSS) which stores the address of the PGW of the HeNB in a user equipment context for use in local breakout service and registers location update of the user equipment.

9. The local breakout service apparatus of claim 8, wherein the MME selects the address of the HeNB provided by the HSS as a PGW address for local breakout service.

10. The local breakout service apparatus of claim 7, wherein the local breakout service request message is a PDN Connectivity Request message or an Attach Request message including the local breakout APN.

11. The local breakout service apparatus of claim 10, wherein the local breakout APN has a fixed value for all user equipments and predefined between the user equipment and network.

12. The local breakout service of claim 10, wherein the local breakout APN is formatted in forms of ‘

local’

, ‘

local.<

mnc>

.<

mcc>

’

, and ‘

<

home eNB id>

.<

mnc>

.<

nnc>

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

13. A local breakout service method for a wireless communication system including a home evolved Node B (HeNB) having a Packet Data Network (PDN) gateway (PGW) and a serving gateway (SGW), comprising:

receiving Access Point Name (APN);

selecting, when the APN is a local breakout APN, the HeNB as a PGW for the local breakout service;

selecting, when APN is received from the HeNB, the HeNB as a SGW for the local breakout service;

requesting the HeNB for creating default bearer; and

routing, at the HeNB, data transmitted by a user equipment to an Internet Protocol (IP) network.