# US 9,439,057 B2 · Registration notification for SMS over LTE

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- Number: US 9,439,057 B2
- Document ID: US9439057B2
- Status: Granted
- Kind: B2
- Application number: 12/571,385
- Filed: 2009-09-30
- Published: 2011-03-31
- Granted: 2016-09-06
- Earliest claimed: 2009-09-30
- Assignees: Alcatel Lucent
- Applicants: Jay B. Bhatt; Yigang Cai; Gyan Shanker
- Inventors: Jay B. Bhatt; Yigang Cai; Gyan Shanker
- Web page: https://patentgrep.com/patent/US9439057B2

## CPC

- 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 4/12: Messaging; Mailboxes; Announcements
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

An LTE subscriber database pushes a registration notification to a SMSC or IP-SM-GW when subscriber registers/deregisters to LTE. The subscriber registration information is stored in local database. Thus, MT SMS may be delivered to a registered subscriber without querying the subscriber database each time for registration information. An exemplary apparatus includes an interface for receiving a registration status message for a mobile device over a broadband network, a subscriber database, and a control system for storing subscriber information in response to receipt of the registration status message and forwarding a notification of subscriber registration status including subscriber registration information to a first network device when the mobile device registers or deregisters to the broadband data network.

## Claims

### Claim 1

A subscriber database, the database configured to:
store subscriber information for a mobile device in response to receipt of a registration status message;
update a profile or record associated with the registration status of the mobile device; and
automatically forward a pushed notification indicating the updated registration status of the mobile device to a Short Message Service Center (SMSC) or Internet-Protocol Short-Message Gateway (IP-SM-GW) to enable the SMSC or IP-SM-GW to forward a Mobile Terminated (MT), Short Message Service (SMS) message to a mobile device without querying the database.

### Claim 2 (depends on 1)

The database of claim 1 wherein the database comprises a Home Subscriber Server (HSS) or an Authentication, Authorization and Accounting (AAA) Server.

### Claim 3 (depends on 1)

The database of claim 1 wherein the database is configured to establish an identity for the mobile device and to organize an authorization to access at least one type of service.

### Claim 4 (depends on 1)

The database of claim 1 wherein the database comprises subscription-related information, the subscription-related information associated with handling of calls, sessions, or a combination thereof.

### Claim 5 (depends on 1)

The database of claim 1 wherein the pushed notification further comprises a subscriber identifier, an access type, a mobile Internet Protocol (IP) address, a mobile directory number (MDN), a Packet Data Network-Gateway-Internet Protocol (PDN-GW-IP) address, a registration timestamp, and a deregistration timestamp.

### Claim 6

A Short Message Service Center (SMS-C) comprising:
a local database configured to store subscriber registration information for a mobile device based on a push notification from an apparatus including a database of subscriber registration information in response to a change in registration status of the mobile device to a broadband data network;
a first interface configured to receive a Mobile Terminated (MT) SMS message destined for the mobile device; and
a control system configured to store the MT SMS message, to identify a routing address for the mobile device over the broadband data network based on the subscriber registration information stored in the local database, and to forward the MT SMS message through the interface to the mobile device over the broadband data network based on the routing address without querying any of a Home Subscriber Server (HSS), a Home Location Register (HLR), or an Authentication, Authorization and Accounting (AAA) Server.

### Claim 7 (depends on 6)

The SMS-C of claim 6 further comprising:
a second interface configured to receive a status notice including the subscriber registration information when the mobile device registers with the broadband data network and when the mobile device deregisters with the broadband data network thereby modifying the registration status of the mobile device.

### Claim 8 (depends on 6)

The SMS-C of claim 6 wherein the first interface comprises a Session Initiation Protocol (SIP) interface for connect to the broadband data network, and the control system is further configured to forward a SIP MESSAGE comprising the MT SMS message through the first interface to the broadband data network.

### Claim 9 (depends on 6)

The SMS-C of claim 6 wherein the control system is configured to forward the MT SMS message through the interface to the mobile device over the broadband data network based on the routing address without querying an external subscriber database.

### Claim 10 (depends on 6)

The SMS-C of claim 6 wherein the control system is configured to forward the MT SMS message through the interface to the mobile device over the broadband data network based on the routing address only when the mobile device is in a registered state with the broadband data network.

### Claim 11 (depends on 6)

The SMS-C of claim 6 wherein the interface is further configured to receive a Mobile Originated (MO) SMS message from the mobile device, and the control system is further configured to (i) verify that the MO SMS message is valid by comparing header information of the MO SMS message with the subscriber registration information stored in the local subscriber registration status database, (ii) identify a destination for the MO SMS message based on routing information stored in a routing database if the MO SMS message is valid, and (iii) to route the MO SMS message to the destination.

### Claim 12 (depends on 6)

The SMS-C of claim 6 wherein the control system is further configured to validate the MO SMS message by comparing a mobile IP (MIP) address in a header of the MO SMS message with a MIP address of the mobile device as stored in the local subscriber registration status database.

### Claim 13 (depends on 6)

The SMS-C of claim 6 wherein the control system is further configured to validate the MO SMS message by comparing a mobile directory number (MDN) in a header of the MO SMS message with an MDN of the mobile device as stored in the local subscriber registration status database.

### Claim 14

A method comprising:
receiving, at a Short Message Service Center (SMS-C), a pushed notification comprising subscriber registration information from a database, the notification indicating a change in a registration status of a mobile device to a broadband data network;
storing the subscriber registration information in the SMS-C;
receiving a Mobile Terminated (MT) Short Message Service (SMS) message that is destined for the mobile device at the SMS-C;
storing the MT SMS message at the SMS-C;
identifying a routing address for the mobile device over the broadband data network based on the subscriber registration information in the SMS-C; and
forwarding the MT SMS message to the mobile device over the broadband data network based on the routing address without querying a Home Subscriber Server (HSS), a Home Location Register (HLR), and an Authentication, Authorization and Accounting (AAA) Server.

### Claim 15 (depends on 14)

The method of claim 14 wherein forwarding the MT SMS message to the mobile device over the broadband data network comprises:
forwarding a SIP MESSAGE from the SMS-C to the broadband data network, wherein the SIP MESSAGE comprises the MT SMS message.

### Claim 16 (depends on 14)

The method of claim 14 further comprising:
receiving a Mobile Originated (MO) SMS message in the SMS-C from the mobile device;
verifying that the MO SMS message is valid by comparing header information of the MO SMS message with the subscriber registration information in the SMS-C;
identifying a destination for the MO SMS message based on a routing table if the MO SMS message is valid; and
routing the MO SMS message to the destination.

### Claim 17 (depends on 14)

The method of claim 14 wherein the broadband data network comprises one of an Evolution-Data Optimized (EVDO) network, a GSM/EDGE Radio Access Network (GERAN), a Universal Terrestrial Radio Access Network (UTRAN), and an Evolved UTAN (E-UTRAN).