Method for delivery of messages in a communication system

A system comprising:

• a communication server configured to receive a message from a node,
• to obtain user information with recipient information in said message, said user information comprising a user entity state and user entity protocol information,
• to determine a first protocol to become a preferred protocol based on said user entity protocol information,
• to attempt the delivery of said message with a delivery mechanism of said preferred protocol,
• to determine a second protocol to become said preferred protocol with said user entity protocol information upon a failure to deliver said message with said first protocol and
• to repeat said attempting of the delivery of said message with a delivery mechanism of said preferred protocol.

A network node comprising:

• a communication core entity configured to receive a message from a node, to obtain user information with recipient information in said message, said user information comprising a user entity state and user entity protocol information, to determine a first protocol to become a preferred protocol based on said user entity protocol information, to determine a second protocol to become said preferred protocol with said user entity protocol information upon a failure indication from a first protocol entity to deliver said message with said first protocol;
• said first protocol entity configured to attempt the delivery of said message with said preferred protocol;
• and
• a second protocol entity configured to repeat said attempting of the delivery of said message with said preferred protocol.

A network node comprising:

• means for receiving a message from a node;
• means for obtaining user information with recipient information in said message, said user information comprising a user entity state and user entity protocol information;
• means for determining a first protocol to become a preferred protocol based on said user entity protocol information;
• means for attempting the delivery of said message with a delivery mechanism of said preferred protocol;
• means for determining a second protocol to become said preferred protocol with said user entity protocol information upon a failure to deliver said message with said first protocol;
• and
• means for repeating said attempting of the delivery of said message with a delivery mechanism of said preferred protocol.

A computer program embodied on a computer readable medium, the computer program comprising code for controlling a processor to execute a method comprising:

• receiving a message from a node;
• obtaining user information with recipient information in said message, said user information comprising a user entity state and user entity protocol information;
• determining a first protocol to become a preferred protocol based on said user entity protocol information;
• attempting the delivery of said message with a delivery mechanism of said preferred protocol;
• determining a second protocol to become said preferred protocol with said user entity protocol information upon a failure to deliver said message with said first protocol;
• and
• repeating said attempting of the delivery of said message with a delivery mechanism of said preferred protocol.