SERICAω. An extension of the SERICA algorithm

This work presents an extension of a recently developed scheme, namely the Simple Explicit Rate Identification with Congestion Avoidance (SERICA) algorithm, which regulates the ABR traffic flow in an ATM network. Like SERICA, the new scheme, which is called SERICA_ω, takes into account the load and the queue length per VC, calculates the first approximation of the ER field of the BRM cell, and then it informs the switch accordingly. Because of the low buffer availability, the network administrator may not be able to initialize a new session. The solution of the above problem is given by means of deriving a new control function family for the SERICA_ω algorithm. This function has the property to decrease the average available queue length of the switch at about O(q), where q is the average queue length of the SERICA_1, i.e., the basic SERICA. The above model is calibrated to use different values of ω, in order to provide a guaranteed ABR service with short buffer availability (or, a limited queue length).