Date Added: Aug 2009
In this paper, the authors study the stability of Open Box Transport Protocol (OBP), an explicit congestion control protocol that provides information to the end systems about the current state of the network path. To support the study they deduced the OBP transfer function to study the protocol stability, which modulates the OBP behavior at equilibrium. In the stability evaluation they use Bode and Nyquist diagrams. The OBP stability characteristics, discussed in this work, are only related with the equilibrium phase, which means when all the network capacity is in use. The results show that OBP is stable for the tested scenarios and that the OBP transfer function does not have unstable poles.