NAT TRAVERSAL FOR LOCAL IP ACCESS

• US 20170026412A1
• Filed: 07/25/2016
• Published: 01/26/2017
• 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
• Granted Patent: US 10,027,710 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 63/164 at the network layer
• CPC Class Codes: H04W 12/02 Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 76/12 Setup 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 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: Y02D 30/70 in wireless communication networks

Abstract

A node is provided that includes a home base station collocated with a local gateway (L-GW) providing access to a local Internet Protocol (IP) network. The node performs an establishment procedure with a security gateway (SeGW), and discriminates a packet. The node uses a first interface configured at the L-GW and a second interface which is configured between the home base station and a gateway for the home base station. The first and second interfaces are tunneled through a same IP security (IPsec) tunnel opened between the home base station and the SeGW. The home base station for the first interface uses a first IP address that is either same as or different from a second IP address used by the home base station for the second interface. The node uses either distinct ranges of Tunnel Endpoint Identifiers (TEIDs) or the first and second IP addresses to discriminate the packet.

Claims

1. A node comprising a home base station collocated with a local gateway (L-GW) providing access to a local Internet Protocol (IP) network, wherein the node is configured to:

perform an establishment procedure with a security gateway (SeGW); and

discriminate a packet, wherein;

the node uses a first interface configured at the L-GW and a second interface which is configured between the home base station and a gateway for the home base station,

the first interface and the second interface are tunneled through a same IP security (IPsec) tunnel which is opened between the home base station and the SeGW,

the home base station for the first interface uses a first IP address that is either same as or different from a second IP address used by the home base station for the second interface,

if the first IP address is same as the second IP address, the node uses distinct ranges of Tunnel Endpoint Identifiers (TEIDs), which are assigned to the first and second interfaces, to discriminate the packet, and

if the first IP address is different from the second IP address, the node uses the first and second IP addresses to discriminate the packet.

2. The node of claim 1, wherein the home base station is a home evolved nodeB (HeNB) or a home nodeB (HNB).

3. The node of claim 1, wherein the first interface is an S5 interface.

4. The node of claim 1, wherein the second interface is an Iuh user plane interface or an S1-U interface.

5. The node of claim 1, wherein the packet is a downlink packet delivered on the first and second interfaces.

6. A method for providing a Local Internet Protocol (IP) Access (LIPA) service, the method comprising:

performing, by a node comprising a home base station collocated with a local gateway (L-GW), an establishment procedure with a security gateway (SeGW); and

discriminating, by the node, packets, wherein;

the node uses a first interface configured at the L-GW and a second interface which is configured between the home base station and a gateway for the home base station,

the first interface and the second interface are tunneled through a same IP security (IPsec) tunnel which is opened between the home base station and the SeGW,

the home base station for the first interface uses a first IP address that is either same as or different from a second IP address used by the home base station for the second interface,

if the first IP address is same as the second IP address, the node uses distinct ranges of Tunnel Endpoint Identifiers (TEIDs), which are assigned to the first and second interfaces, to discriminate the packet, and

if the first IP address is different from the second IP address, the node uses the first and second IP addresses to discriminate the packet.

7. The method of claim 6, wherein the home base station is a home evolved nodeB (HeNB) or a home nodeB (HNB).

8. The method of claim 6, wherein the first interface is an S5 interface.

9. The method of claim 6, wherein the second interface is an Iuh user plane interface or an S1-U interface.

10. The method of claim 6, wherein the packet is a downlink packet delivered on the first and second interfaces.