TINA service session control supporting complex negotiation

The paper describes how the TINA GSC (Global Session Control) service component has been designed and implemented to support complex negotiation driven by ownership assignment over the service session members represented by a session graph. First, a brief introduction into TINA concepts, and the motivation of the work are presented. Then, both the information and the computational models of the GSC are described. Particular emphasis is given to major contributions of the work, namely flexible and transparent management of dynamic modification sequences treated as atomic units, and negotiation supporting concurrent voting. A simple scenario exemplifies GSC functionality's.