# US 2014/0192640 A1 · Traffic offload via local network

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- Number: US 2014/0192640 A1
- Document ID: US20140192640A1
- Status: Published application
- Kind: A1
- Application number: 14/127,070
- Filed: 2012-06-15
- Published: 2014-07-10
- Earliest claimed: 2011-06-18
- Assignees: LG Electronics Inc.
- Inventors: Alexandre Saso Stojanovski; Hyun Sook Kim; Jae Hyun Kim; Tae Hyeon Kim; Lae Young Kim
- Web page: https://patentgrep.com/patent/US20140192640A1

## CPC

- H04W 36/22: for handling the traffic
- H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W 8/082: {for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents}
- H04W 36/0077: {of access information of target access point}
- H04W 48/20: Selecting an access point
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

For traffic offload via a local network, a MME may obtain from a HSS, subscription data including SIPTO related permissions defined on APN basis that indicate SIPTO prohibited, indicate SIPTO allowed excluding SIPTO via Local Network (SIPTO@LN), and/or indicate SIPTO allowed including SIPTO@LN. Then, the MME may obtain information about one or more local Gateways (GWs) capable of offloading selected traffic, such information indicating which of the one or more local GWs provides access to which Packet Data Networks (PDNs), with each PDN being identified by its associated APN. Finally, the MME may process PDN connections and/or PDN disconnections in order to support offloading of the selected traffic. The counterpart UE includes the appropriate means of hardware and/or software that is configured to support and perform SIPTO@LN.

## Claims

### Claim 1

A method comprising:
obtaining, by a Mobility Management Entity (MME) from a Home Subscriber Server (HSS), subscription data including Selected IP Traffic Offload (SIPTO) related permissions defined on Access Point Name (APN) basis that indicate at least one among situations comprising SIPTO prohibited, SIPTO allowed excluding SIPTO via Local Network (SIPTO@LN), and SIPTO allowed including SIPTO@LN;
receiving, by the MME, information about one or more local Gateways (GWs) capable of offloading selected traffic, said information indicating which of the one or more local GWs provide access to which Packet Data Networks (PDNs), with each PDN being identified by its associated APN; and
processing, by the MME, PDN connections and/or PDN disconnections in order to support said offloading of said selected traffic.

### Claim 2 (depends on 1)

The method of claim 1, wherein the processing step comprises:
performing, by the MME with a User Equipment (UE), a PDN disconnection with request for subsequent reconnection; and
when the UE attempts reconnection, selecting, by the MME, one of the local GWs based on the obtained subscription data and the received information about the one or more local GWs.

### Claim 3 (depends on 1)

The method of claim 1, wherein the processing step comprises:
based on a decision by the MME to perform SIPTO@LN for said PDN connections, initiating deactivation, by the MME, of said PDN connections by sending to the UE a Deactivate Bearer Request message indicating that reactivation is required for said PDN connections; and
when the UE attempts reactivation, selecting, by the MME, one of the local GWs based on the obtained subscription data and the received information about the one or more local GWs.

### Claim 4 (depends on 1)

The method of claim 1, wherein the SIPTO allowed including SIPTO@LN includes implicit user consent or explicit user consent.

### Claim 5 (depends on 1)

The method of claim 1, wherein a single local GW supports multiple APNs.

### Claim 6 (depends on 1)

The method of claim 1, wherein one or more local GWs are reachable by a Home eNodeB (eNB).

### Claim 7 (depends on 1)

The method of claim 1, wherein a same local GW supports both SIPTO and Local IP Access (LIPA).

### Claim 8 (depends on 1)

The method of claim 1, wherein APN information is received, by the MME from a Home eNB, that provides a list of GWs.

### Claim 9 (depends on 8)

The method of claim 8, wherein if the APN information is not received from the Home eNB, then the MME is assumed to know which APNs are used to provide access to the Internet.

### Claim 10

A Mobility Management Entity (MME) comprising:
means for obtaining, from a Home Subscriber Server (HSS), subscription data including Selected IP Traffic Offload (SIPTO) related permissions defined on Access Point Name (APN) basis that indicate at least one among situations comprising SIPTO prohibited, SIPTO allowed excluding SIPTO via Local Network (SIPTO@LN), and SIPTO allowed including SIPTO@LN;
means for receiving information about one or more local Gateways (GWs) capable of offloading selected traffic, said information indicating which of the one or more local GWs provide access to which Packet Data Networks (PDNs), with each PDN being identified by its associated APN; and
means for processing PDN connections and/or PDN disconnections in order to support said offloading of said selected traffic.