Correlation ID for local IP access

• US 9,325,531 B2
• Filed: 11/01/2010
• Issued: 04/26/2016
• Est. Priority Date: 11/02/2009
• Status: Active Grant

• Current Assignee: Rosedale Dynamics LLC
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Stojanovski, Saso, Vedrine, Arnaud
• Primary Examiner(s): Blanton, John
• Assistant Examiner(s): TRAN, THINH D
• Application Number:
  US12/916,883
• Publication Number:
  US 20110103310A1
• Time in Patent Office: 2,003 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 76/16 Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 76/22 Manipulation of transport tunnels
• 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 8/26 Network addressing or numbering for mobility support
• 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
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 92/04 Interfaces between hierarchically different network devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The invention relates to a home cellular base station (HeNB), comprising a radio interface (RI), to communicate with a user equipment (UE), a local interface (LI), to communicate with a local gateway (L-GW) providing access to a local IP network, a user plane interface (S1-U), to communicate with a serving gateway (SGW), and a control plane interface (S1-MME), to communicate with a control node (MME). The home cellular base station (HeNB) further comprises a selection module (SelMod) set to obtain a first correlation ID for enabling a direct user plane path between the home cellular base station (HeNB) and the local gateway (L-GW), the first correlation ID being obtained via the control plane interface (S1-MME) upon each establishment of a bearer providing access to the local IP network.

The invention also relates to a control node (MME), to a home subscriber server (HSS), to a direct path enablement method, and to a PDN management method.

Claims

1. A method for providing Local IP Access (LIPA), the method comprising:

for uplink data transmission, if a correlation identification (ID) is included in a request message received from a mobility management entity (MME), enabling, by an apparatus having a base station collocated with a local gateway (L-GW) providing a direct user plane path between the base station and the L-GW, the direct user plane path by using the correlation ID, wherein the apparatus uses an interface configured at the L-GW, the interface comprising an S5 interface, the correlation ID comprising a General Packet Radio Service (GPRS) Tunneling Protocol (GTP) based endpoint identifier of the S5 interface or a Generic Routing Encapsulation (GRE) key of the S5 interface configured between the local gateway and the S-GW; and

for downlink data transmission, if the base station establishes a secure link with a security gateway (SeGW) and the L-GW uses the same secure link with the SeGW, discriminating, by the apparatus, at least one downlink packet delivered through the secure link to the base station and the L-GW by using different IP address, the different IP address being allocated to the base station and the L-GW.

2. The method of claim 1, wherein the request message is used for creating the bearer with a mobile terminal.

3. The method of claim 1, wherein the request message comprises a bearer setup request message.

4. The method of claim 3, wherein the bearer setup request message comprises a Packet Data Network (PDN) connectivity Accept message.

5. An apparatus in a communication system, comprising:

a local gateway (L-GW) configured for providing Local IP Access (LIPA);

a base station collocated with the L-GW; and

a processor coupled to the L-GW and the base station, the processor configured;

for uplink data transmission, if a correlation identification (ID) is included in a request message received from a mobility management entity (MME), enabling a direct user plane path between the base station and the L-GW by using the correlation ID, wherein the apparatus uses an interface configured at the L-GW, wherein the interface comprises an S5 interface, wherein the correlation ID comprises a General Packet Radio Service (GPRS) Tunneling Protocol (GTP) based endpoint identifier of the S5 interface or a Generic Routing Encapsulation (GRE) key of the S5 interface; and

for downlink data transmission, if the base station establishes a secure link with a security gateway (SeGW) and the L-GW uses the same secure link with the SeGW, discriminate at least one downlink packet delivered through the secure link to the base station and the L-GW by using different IP address, wherein the different IP address are allocated to the base station and the L-GW.

6. The apparatus of claim 5, wherein the request message is used for creating the bearer with a mobile terminal.

7. The apparatus of claim 5, wherein the request message comprises a bearer setup request message.

8. The apparatus of claim 7, wherein the bearer setup request message comprises a Packet Data Network (PDN) connectivity Accept message.