The proportional delay differentiation model provides a consistent packet delay differentiation between various classes of service. The waiting time priority (WTP) scheduler is a priority scheduler in which the priority of a packet increases in proportion to its waiting time, and it is known as the best scheduler to achieve the proportional delay differentiation model. This paper proposes an ad...

In this paper, a new priority M/M/c queuing hub covering problem is presented, in which products with high priority are selected for service ahead of those with low priority. In addition, a mixed-integer nonlinear mathematical programming model is presented to find a good solution of the given problem. Due to its computational complexity, we propose a multi-objective parallel simulated annealin...

Queuing disciplines have now become the subject of intensive discussion in network field. There are several queuing disciplines that claim best performance. In this paper, we evaluate a hypothetical network topology based on multi-class traffic approach. Multi-class traffic provides for aggregate traffic to be classified and conditioned at the edge of the network routers on the basis of perform...

This paper focuses on cost and profit analysis of single-server Markovian queuing system with two priority classes. In this paper, functions of total expected cost, revenue and profit of the system are constructed and subjected to optimization with respect to its service rates of lower and higher priority classes. A computing algorithm has been developed on the basis of fast converging numerica...

This paper describes a state space-based simulation method for queuing systems with attributed customers. The approach extends a previous version, which was designed for only one customer class, enabling the simulation of a larger group of queuing models. The work is motivated by the need for exact solutions for queuing systems where no analytical solution is available. In this paper, the origi...

The paper presents a quality of service aware routing protocol which provides low latency for high priority packets. Packets are differentiated based on their priority by applying queuing theory. Low priority packets are transferred through less energy paths. The sensor nodes interact with the pivot nodes which in turn communicate with the sink node. This protocol can be applied in monitoring c...

The provisioning of end-to-end services in presence of traffic aggregation is evaluated in the framework of the Differentiated Services QoS architecture. The effect of stream multiplexing on delay and jitter-sensitive traffic is analyzed through an experimental approach. Aggregation is evaluated in three different scenarios: with different aggregate traffic loads, with a variable number of flow...

Enterprises are increasingly depending on their networks to carry mission-critical applications. To ensure the performance of such applications, quality of service (QoS) control is required and routers with QoS functions should be implemented in networks. This paper describes the OPNETTM modeling of an IP router with two scheduling algorithms: custom queuing (CQ) and priority queuing (PQ). A pr...

To estimate the capacity of roundabouts more accurately, the priority rank of each stream is determined through the classification technique given in the Highway Capacity Manual 2010 (HCM2010), which is based on macroscopical analysis of the relationship between entry flow and circulating flow. Then a conflict matrix is established using the additive conflict flow method and by considering the ...