High performance SQL to SMS gateway configuration using Oracle database server (500 MPS+)

(Requires Ozeki NG SMS Gateway v4.5.0 or newer version)This guide gives you information on how to configure your Ozeki NG SMS Gateway software to achieve a performance of 500 Messages Per Second (MPS) or more in an SQL to SMS gateway environment. The solution is based on Oracle and it requires the installation of Ozeki NG SMS Gateway.


The configuration works the following way: Ozeki NG SMS Gateway connects to an ORACLE database using an oledb connection. It reads outgoing messages from this database and sends these messages to the Short Messages Service Center (SMSC) of an SMS service provider over the Internet through an SMPP connection (Figure 1).

architecture overview of oracle to sms configuration
Figure 1 - Architecture overview of ORACLE to SMS configuration

How to setup

To setup this system, you need to perform the following steps:

  1. Setup your ORACEL database server
  2. Setup Ozeki NG SMS Gateway
  3. Configure an SMS Service Provider connection in Ozeki NG SMS Gateway
  4. Configure SQL to SMS forwarding
  5. Configure Ozeki NG SMS Gateway for high performance operation

Step 1.) Setup your ORACLE database server

For this solution to work you need Microsoft SQL Server 2008 (or Microsoft SQL Server 2005). In ORACLE you should create a database. The recommended name for the database is 'ozeki'. You should also create a user with SQL server authentication, who can connect to this database. The username should be 'ozekiuser', the password should be 'ozekipass'. In the database, create the following table structure, and grant SELECT,INSERT and UPDATE privileges to the ozekiuser user.

CREATE TABLE ozekimessageout (
                 id int ,
                 sender varchar(255),
                 receiver varchar(255),
                 msg varchar(160),
                 msgtype varchar(30),
                 stat int,
                 operator varchar(30)

CREATE INDEX idindex ON ozekimessageout (id);

CREATE index index_id3 ON ozekimessageout(id);
CREATE TRIGGER ozekimessageout_auto BEFORE INSERT on ozekimessageout
for each row
when (new.id is null)
   SELECT z.nextval INTO :new.id FROM DUAL;

CREATE TABLE msgreferences (
             id int primary key,
             msgid int,
             stat int,
             reference char(200),
             senttime varchar(100),
             errormessage varchar(2048)

CREATE INDEX refindex ON msgreferences (id);
CREATE TRIGGER msgreferences_auto BEFORE INSERT on msgreferences
for each row
when (new.id is null)
   SELECT M.nextval INTO :new.id FROM DUAL;

CREATE TABLE ozekimessagein (
             id int ,
             sender varchar(255),
             receiver varchar(255),
             msg varchar(160),
             senttime varchar(100),
             receivedtime varchar(100),
             msgtype varchar(30)

CREATE index index_id4 ON ozekimessagein(id);
CREATE TRIGGER ozekimessagein_auto BEFORE INSERT on ozekimessagein
for each row
when (new.id is null)
   SELECT U.nextval INTO :new.id FROM DUAL;

Figure 2 - Database table layout

If you take a look at this table structure you will notice several differences to the default table structure used in the standard Ozeki SQL to SMS solution. The first difference is that the ozekimessageout table contains a stat field instead of status and this field is an integer. The reason for the change in the name of the field is that the status word is a reserved word in ORACLE. The reason for the change in the field type is that it is significantly faster to update integer values, then to update strings in a database.

In this ozekimessageout table the stat field can have the following values:

1Message waiting to be submitted
2Message queued for delivery
3Message submitted to the SMSC
4Message rejected by the SMSC
5Message delivered to handset
6Message delivery to handset failed

Figure 3 - Stat field values

If you want to send an SMS message you need to insert the message with stat value 1 into the ozekimessageout database table. To send a message you can use the following SQL command:

INSERT INTO ozekimessageout (sender,receiver,msg,msgtype,stat)
VALUES ('+111111','+222222','Hello world','SMS:TEXT',1);

Figure 4 - Sample SQL command to send an SMS message

After you have inserted a message for submission, Ozeki NG SMS Gateway will read it and will change the value of the stat field to '2'. This indicates that the message is queued for delivery. A few moments later Ozeki NG tries to submit this message to the SMSC. If message submission is successful the value of the stat field is updated to '3', if message submission fails, the value is updated to '4'. In addition to this update a new record is inserted into a different table called msgreferences, to give you details about message submission results.

This brings us to note the second change in the database structure: There is a new table called msgreferences. This table contains records that are inserted by Ozeki NG SMS Gateway after a message is successfully submitted to the SMSC or after the message submission fails. The 'id' field in this table contains a value matching the id field of ozekimessageout (this is a foreign key). The second field, called reference, will contain the callback id (message reference value) returned by the SMSC after it accepted the message for delivery. The senttime contains the timestamp of message submission and the error message field holds a text explaining the error in case the message could not be submitted to the SMSC. The reason for introducing this table was that it is faster to insert a new record into a database table then to update an existing record with new text content.

Step 2.) Setup Ozeki NG SMS Gateway

Download and install

Once your database is defined, you are ready to setup Ozeki NG SMS Gateway. To start download Ozeki NG SMS Gateway from the download page, then run the setup wizard by clicking "Next" in each dialog box. This will give you a default configuration.

Step 3.) Configure an SMPP mobile network connection

The first step in configuring Ozeki NG SMS Gateway, is to configure a mobile network connection. In our example this is an SMPP connection. The SMPP service connection setup page gives you details instruction on how to setup SMPP. If you could successfully configure your SMPP connection, you should test connectivity by sending a test message from the graphical user interface to your mobile phone. Do this by clicking on the "Compose" button.

Step 4.) Configure SQL to SMS forwarding

To setup the SQL to SMS gateway service, you need to setup an instance of the "Database user with batch processing" module. This can be done by clicking on "Add user" menu item the "Users and applications" menu, then clicking on "install" in the "Database user with batch processing for Oracle" section (Figure 4).

setup database user with batch processing
Figure 4 - Setup Database user with batch processing

During the installation provide a unique user name. "oracle1" is a good choice (Figure 5).

configure a unique user name
Figure 5 - Configure a unique user name

On the configuration form, that comes up after this, turn off logging, by making sure the "Log sent and received messages in human readable format" and the "Log low level communication" checkboxes are not checked. Logging should be turned off to get better performance (Figure 6).

turn off logging
Figure 6 - Turn off logging

The final step in configuring the SQL to SMS gateway system, is to specify the database connection string. The database connection string can be specified by clicking on the "ORACLE Settings" link in the left hand panel. The default connection string is:

Provider=OraOLEDB.Oracle;Data Source=MyOracleDB; User Id=myUsername;Password=myPassword;

If you use Oracle Expres edition, the following connection string might work for you:

Provider=OraOLEDB.Oracle;dbq=localhost:1521/XE;User Id=SYSTEM;Password=qwe123;

In the connection string change settings to point to your ORACLE instance. Please set the username and password and the name of the database (Figure 7).

setup the connection string
Figure 7 - Setup the connection string

Step 5.) Configure Ozeki NG SMS Gateway for high performance operation

The final step is to adjust Ozeki NG SMS Gateway to give you the throughput you desire. In order to achieve high throughput, you need to disable some functionality, that eats up resources. In short do the following:

Open the "Server preferences form" from the "Edit menu". In the server preferences form open the "Advanced" tab and apply the following configure:

  1. Uncheck the "Match delivery reports" to original messages checkbox
  2. Check the "Delete messages that were forwarded to a client, or processed by an application" checkbox
  3. Uncheck the "Use persistent message queues" checkbox

The appropriate configuration can be seen on Figure 8.

high performance configuration
Figure 8 - High performance configuration


To test the configuration you can insert several messages into the ozekimessagout database table and check the event log of Ozeki NG SMS Gateway to see the performance they were sent.


I have one issue. If we send SMS through ozeki s/w and receiver number does not exists then what happen?

When you send an SMS through Ozeki software to a receiver whose number does not exist:
The SMS service provider may either reject the message during the sending process or accept it initially. If accepted, the provider will later return a delivery report indicating that the message could not be delivered. In the first case, the SMS ends up in the “not sent” folder. In the second case, it initially appears in the “sent” folder, but when an “undelivered” report arrives, it is marked as such. If you’re using an SQL to SMS configuration, the status will be set to “notsent” or “sent”, and later changed to “undelivered” based on the delivery outcome.

I have one issue. If we send SMS through ozeki s/w and receiver has switched off his mobile. Will updated value of status field of ozekimessageout table show the status?

When you send an SMS through Ozeki software to a recipient whose mobile phone is switched off:
The message is accepted by the SMS service provider for delivery. It is saved in the “sent” folder. While the recipient’s phone remains off, the SMS service provider’s SMSC stores the message. Once the phone is switched on, the message is delivered to it, and your system receives a delivery report. However, if the recipient never switches on their phone (beyond the message validity time, usually 1 week), the SMS is deleted from the SMSC, and you receive an “undelivered” status report. In an SQL to SMS configuration, the status transitions from “sent” to “delivered” or “undelivered” based on the delivery outcome.

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