# US 10,455,489 B2 · Method for supporting PDN GW selection

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- Number: US 10,455,489 B2
- Document ID: US10455489B2
- Status: Granted
- Kind: B2
- Application number: 15/277,466
- Filed: 2016-09-27
- Published: 2017-01-19
- Granted: 2019-10-22
- Earliest claimed: 2009-05-08
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Huarui Liang; Hong Wang; Lixiang Xu; Xiaoqiang Li
- Web page: https://patentgrep.com/patent/US10455489B2

## CPC

- H04W 48/17: {Selecting a data network PoA [Point of Attachment]}
- H04L 61/5007: Internet protocol [IP] addresses
- H04W 8/082: {for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents}
- H04W 48/02: Access restriction performed under specific conditions
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 48/16: Discovering, processing access restriction or access information
- H04W 48/20: Selecting an access point
- H04W 76/11: Allocation or use of connection identifiers
- H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
- H04W 80/04: Network layer protocols, e.g. mobile IP [Internet Protocol]
- H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method for supporting packet data network (PDN) gateway (GW) selection, comprising the following steps of: receiving by a mobility management entity (MME) a local route optimization service request information; searching by the MME the internet protocol (IP) address of a PDN GW which supports local route optimization according to the IP address of a PDN GW on home evolved node B (HeNB) (PDN GWh); sending by the MME a bearer request establishment message to the PDN GWh. The method of the present invention can ensure core network equipment to find PDN GW correctly while HeNB system supports local route optimization.

## Claims

### Claim 1

A method by a mobility management entity (MME) in a wireless communication system, the method comprising:
receiving, from a base station, a message related to a terminal;
receiving, from the terminal, information on an access point name (APN) for a packet data network (PDN) connectivity request;
identifying whether the APN is authorized for a local internet protocol access (LIPA) based on subscription information of the terminal;
identifying whether an address of a gateway collocated with the base station is included in the message in case that the APN is authorized for the LIPA based on the subscription information of the terminal; and
rejecting the PDN connectivity request in a case that the address is not included in the message and the APN is authorized for the LIPA based on the subscription information of the terminal.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
selecting the gateway using the address, in a case that a connection establishment corresponding to the message is permitted based on the subscription information and the address is included in the message.

### Claim 3 (depends on 2)

The method of claim 2,
wherein the subscription information comprises at least one closed subscriber group identifier (CSG ID), the at least one CSG ID being used for authorizing the connection related to the LIPA.

### Claim 4 (depends on 1)

The method of claim 1,
wherein the address is included in an s1 message, and
wherein the message is an initial user equipment (UE) message.

### Claim 5

A method by a base station in a wireless communication system, the method comprising:
transmitting, to a mobility management entity (MME), a message related to a terminal; and
receiving, from the MME, a response message in response to the message,
wherein information on an access point name (APN) for a packet data network (PDN) connectivity request is acquired at the MME,
wherein whether the APN is authorized for a local internet protocol access (LIPA) is identified based on subscription information of the terminal,
wherein whether an address of a gateway collocated with the base station is included in the message is identified in case that the APN is authorized for the LIPA based on the subscription information of the terminal, and
wherein the PDN connectivity request is rejected in a case that the address is not included in the message and the APN is authorized for the LIPA based on the subscription information of the terminal.

### Claim 6 (depends on 5)

The method of claim 5, wherein the gateway is selected using the address, in a case that a connection establishment corresponding to the message is permitted based on the subscription information and the address is included in the message.

### Claim 7 (depends on 6)

The method of claim 6, wherein the subscription information comprises at least one closed subscriber group identifier (CSG ID), the at least one CSG ID being used for authorizing the connection related to the LIPA.

### Claim 8 (depends on 5)

The method of claim 5,
wherein the address is included in an s1 message, and
wherein the message is an initial user equipment (UE) message.

### Claim 9

An apparatus in a wireless communication system, the apparatus comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a base station, a message related to a terminal,
receive, from the terminal, information on an access point name (APN) for a packet data network (PDN) connectivity request,
identify whether the APN is authorized for a local internet protocol access (LIPA) based on subscription information of the terminal,
identify whether an address of a gateway collocated with the base station is included in the message in case that the APN is authorized for the LIPA based on the subscription information of the terminal, and
reject the PDN connectivity request in a case that the address is not included in the message and the APN is authorized for the LIPA based on the subscription information of the terminal.

### Claim 10 (depends on 9)

The apparatus of claim 9, wherein the controller is further configured to select the gateway using the address, in a case that a connection establishment corresponding to the message is permitted based on the subscription information and the address is included in the message.

### Claim 11 (depends on 10)

The apparatus of claim 10,
wherein the subscription information comprises at least one closed subscriber group identifier (CSG ID), the at least one CSG ID being used for authorizing the connection related to the LIPA.

### Claim 12 (depends on 9)

The apparatus of claim 9,
wherein the address is included in an s1 message, and
wherein the message is an initial user equipment (UE) message.

### Claim 13

An apparatus in a wireless communication system, the apparatus comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a mobility management entity (MME), a message related to a terminal, and
receive, from the MME, a response message in response to the message,
wherein information on an access point name (APN) for a packet data network (PDN) connectivity request is acquired at the MME,
wherein whether the APN is authorized for a local internet protocol access (LIPA) is identified based on subscription information of the terminal,
wherein whether an address of a gateway collocated with the apparatus is included in the message is identified in case that the APN is authorized for the LIPA based on the subscription information of the terminal, and
wherein the PDN connectivity request is rejected in a case that the address is not included in the message and the APN is authorized for the LIPA based on the subscription information of the terminal.

### Claim 14 (depends on 13)

The apparatus of claim 13, wherein the gateway is selected using the address, in a case that a connection establishment corresponding to the message is permitted based on the subscription information and the address is included in the message.

### Claim 15 (depends on 14)

The apparatus of claim 14,
wherein the subscription information comprises at least one closed subscriber group identifier (CSG ID), the at least one CSG ID being used for authorizing the connection related to the LIPA.

### Claim 16 (depends on 13)

The apparatus of claim 13,
wherein the address is included in an s1 message, and
wherein the message is an initial user equipment (UE) message.