Protocol level communications for protocol level composition with session sharing

1. A method for composition of elements in a communication session, the method comprising:

processing the communication session with a device executing a first protocol session level element participating in the communication session at a first level;

detecting a change in a session state for the communication session by the first protocol session level element;

updating state information for the communication session with the first protocol session level element in response to detecting the change in the session state for the communication session and based on the processing of the communication session by the first protocol session level element;

passing the state information from the device executing the first protocol session level element to a device executing a second protocol session level element participating in the communication session at a second level, wherein the device executing the first protocol session level element and the device executing the second protocol session level element are different types of devices, wherein the first level and the second level are different session levels, and wherein the first protocol session level element and the second protocol session level element are orchestrated at an application session level;

receiving the state information from the first protocol session level element at the second protocol session level element;

processing the communication session with the second protocol session level element based on the state information for the communication session received from the first protocol session level element;

detecting a change in a session state for the communication session by the second protocol session level element based on the state information for the communication session received from the first protocol session element; and

updating the state information for the communication session with the second protocol session level element in response to detecting the change in the session state for the communication session and based on the processing of the communication session by the second protocol session level element.

2. The method of claim 1 , wherein the communication session comprises an application session and a protocol session.

3. The method of claim 2 , wherein passing the state information from the first protocol session level component to the second protocol session level component comprises passing the state information as part of a header of a protocol session level message.

4. The method of claim 2 , wherein passing the state information from the first protocol session level component to the second protocol session level component comprises passing the state information out of band from protocol session level exchanges between the first protocol session level component and the second protocol session level component.

5. The method of claim 2 , wherein passing the state information from the first protocol session level component to the second protocol session level component comprises passing the state information out of band from protocol specific exchanges between an application session level component and the first protocol session level component and the application session level component and the second protocol session level component.

6. The method of claim 2 , wherein passing the state information from the first protocol session level component to the second protocol session level component comprises writing the state information for the communication session to a set of shared information with the first protocol session level component and reading the state information for the communication session from the set of shared information with the second protocol session level component.

7. The method of claim 1 , wherein the state information for the communication session comprises routing information.

8. The method of claim 1 , wherein the state information for the communication session comprises routing logic.

9. The method of claim 1 , wherein the state information for the communication session comprises status information related to the processing of the communication session.

10. The method of claim 1 , wherein updating the state information for the communication session is performed synchronously.

11. The method of claim 1 , wherein updating the state information for the communication session is performed asynchronously.

12. A system comprising:

a communication network adapted to support a communication session via a signaling protocol;

a first device executing a first protocol session level element communicatively coupled with the communication network and participating in the communication session at a first level, wherein the first element is adapted to perform communication session processing, detect a change in a session state for the communication session, and update state information for the communication session in response to detecting the change in the session state for the communication session and based on the communication session processing; and

a second device executing a second protocol session level element communicatively coupled with the communication network and participating in the communication session at a second level, wherein the first device and the second device are different types of devices, wherein the first level and the second level are different session levels, wherein the first protocol session level element is further adapted to pass the state information to the second protocol session level element, and wherein the first protocol session level element and the second protocol session level element are orchestrated at an application session level, wherein the second protocol session level element is further adapted to receive the state information from the first protocol session level element, perform communication session processing based on the state information for the communication session received from the first protocol session level element, detect a change in a session state for the communication session based on the state information for the communication session received from the first protocol session element, and update the state information for the communication session in response to detecting the change in the session state for the communication session and based on the communication session processing.

13. A machine-readable memory having stored thereon a series of instruction which, when executed by a processor, cause the processor to perform composition of elements in a communication session by:

processing the communication session with a device executing a first protocol session level element participating in the communication session at a first level;

detecting a change in a session state for the communication session by the first protocol session level element;

updating state information for the communication session with the first protocol session level element in response to detecting the change in the session state for the communication session and based on the processing of the communication session by the first protocol session level element;

passing the state information from the device executing the first protocol session level element to a device executing a second protocol session level element participating in the communication session at a second level, wherein the device executing the first protocol session level element and the device executing the second protocol session level element are different types of devices, wherein the first level and the second level are different session levels, and wherein the first protocol session level element and the second protocol session level element are orchestrated at an application session level;

receiving the state information from the first protocol session level element at the second protocol session level element;

processing the communication session with the second protocol session level element based on the state information for the communication session received from the first protocol session level element;

detecting a change in a session state for the communication session by the second protocol session level element based on the state information for the communication session received from the first protocol session element; and

updating the state information for the communication session with the second protocol session level element in response to detecting the change in the session state for the communication session and based on the processing of the communication session by the second protocol session level element.