A Recursive Model for Controlling New Voice Call Congestion on GSM Network Using Priority Queue Discipline and Call Duration Control
Osondu Everestus Oguike (University of Nigeria, Nsukka & Godfrey Okoye University, Enugu, Nigeria); Godwin Mbah and Moses Oyesanya (University of Nigeria, Nsukka, Nigeria)
Voice call is the most widely subscribed service on the Global System for Mobile communication network; as a result, the probability of congestion occurring on the network through voice call is very high. Whenever it occurs, there is need to control it. Controlling congestion on Global System for Mobile communication network will help to provide quality of service on the network. The most popular scheme for controlling congestion on the network is the call admission control, which defines the condition for rejecting and admitting new voice calls on the network. The condition for rejecting and admitting new calls is based on the congestion parameter, called new voice call blocking probability. This means that when the new voice call blocking probability is above a certain value, the network begins to reject new voice calls, otherwise, new voice calls will be admitted into the network. This control scheme will help to control the congestion parameter, new voice call blocking probability. However, the call admission control may lead to starvation, a situation where new voice call will be denied access into the network for a long period of time. Therefore, there is need for a new congestion control scheme that will give subscribers fair access into the network. Though, the first come first serve is the most popular queue discipline that can be used to model new voice call blocking probability, however, there are other queue disciplines, like priority queue discipline that can be used to model the new voice call blocking probability. This paper uses non pre-emptive priority queue discipline to develop recursive model for the new voice call blocking probability. The paper also uses a novel scheme for controlling congestion on the Global System for Mobile communication network, called call duration control. The scheme models the duration of new voice call based on the new voice call blocking probability, and uses it to time out the subscribers if he/she fails to terminate the call within the estimated time duration.
Journal: International journal of simulation: systems, science & technology V18
Published: Mar 31, 2017