WiFi boost with uplink offload to LTE with independent IP addresses

Patent metadata

Field	Value
Publication number	US-9806905-B2
Application number	US-201414569726-A
Country	US
Kind code	B2
Filing date	Dec 14, 2014
Priority date	Dec 14, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A local gateway and router device is configured to route uplink IP packets from a base station to a network element of a wireless local area network (WLAN) by configuring an IP route for the uplink IP packets based on a source IP address of the uplink IP packets. The source IP address is obtained from the WLAN; the uplink IP packets originate from a user equipment application having the source IP address; and the uplink IP packets have an indicator indicating that the uplink IP packets were received at the base station over a cellular link between the user equipment and the base station.

First claim

We claim:

1. A radio access network element comprising:
a local gateway and router device configured to route uplink IP packets from a base station to a network element of a wireless local area network (WLAN) by configuring an IP route for the uplink IP packets based on a source IP address of the uplink IP packets, wherein
the source IP address is obtained from the WLAN,
the uplink IP packets originate from a user equipment application having the source IP address, and
the uplink IP packets have an indicator indicating that the uplink IP packets were received at the base station over a cellular link between the user equipment and the base station.

2. The radio access network element of claim 1 , wherein the local gateway and router device is further configured to route the uplink IP packets to the network element of the WLAN over an IP tunnel between the local gateway and router device the network element of the WLAN.

3. The radio access network of claim 2 , wherein the network element of the WLAN is a WLAN access point.

4. The radio access network element of claim 1 , wherein the local gateway and router device is further configured to route the uplink IP packets to the network element of the WLAN over a generic routing encapsulation (GRE) tunnel between the local gateway and router device and the network element of the WLAN.

5. The radio access network element of claim 4 , wherein the network element of the WLAN is a WLAN gateway.

6. The radio access network of claim 5 , wherein the local gateway and router device is further configured to route the uplink IP packets to a network address translation (NAT) function at the WLAN gateway.

7. The radio access network of claim 1 , wherein the local gateway and router device is further configured to establish an interface with the network element of the WLAN, the interface with the network element of the WLAN being one of an IP tunnel and a GRE tunnel between the local gateway and router device and the network element of the WLAN.

8. The radio access network of claim 1 , wherein the uplink IP packets include at least one of uplink bearer IP traffic and Transport Control Protocol (TCP) acknowledgements originating from the user equipment application having the source IP address obtained from the WLAN.

Assignees

• Kanugovi Satish
• Vasudevan Subramanian
• Scharf Michael
• Alcatel Lucent

Inventors

• Kanugovi Satish
• Vasudevan Subramanian
• Scharf Michael

Classifications

• H04W40/02 Primary

  Communication route or path selection, e.g. power-based or shortest path routing · CPC title

• H04L45/72

  Routing based on the source address · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W76/12

  Setup of transport tunnels · CPC title