Non-preemptive priority queue system is a type of where customers with higher priorities cannot interrupt low one while being served. High consumers will still be at the head queue. This article discusses non-preemptive multiple working vacations, vacation can interrupted. Customers are classified into two classes, namely class I (non-preemptive customers) and II, exponentially distributed serv...

Among the various existing models for the warehousing management, the simultaneous use of private and public warehouses is as the most well-known one. The purpose of this article is to develop a queuing theory-based model for determining the optimal capacity of private warehouse in order to minimize the total corresponding costs. In the proposed model, the available space and budget to create a...

In this work, we consider the performance analysis of state dependent priority traffic and scheduling in device to (D2D) heterogeneous networks. There are two transmission types data wireless communication, such as video or telephone, which always meet requirements high (HP) first. If there is a large amount low (LP) data, will be LP that cannot sent. This situation cause excessive delay packet...

high congestion of returned product at remanufacturing facility causes substantial delays and consequently remarketing value losses for time-sensitive and high-tech products with short life cycles, such as electronic equipments. at the remanufacturing site the returned product are inspected and classified according to their quality and processing time in one of the two classes: class 1 being ad...

Traditionally targeted to best-effort packet-switching networks , adaptive applications implement a variety of mechanisms to make use of variable quality bearing service. In the framework of integrated services networks, relaxing quality of service (QoS) requirements through the use of such applications allows a greater operation flexibility and increases statistical multiplexing gains. However...

This paper presents formulas for calculating waiting time for customers in a queue with combined preemptive and head-ofline (nonpreemptive) priority scheduling disciplines and describes the reasoning behind them. This work has been applied in the development of programmable terminal control units. Introduction The development of programmable terminal control units has created the need for a new...

Queuing theory is the study of queues for managing process and objects. In this paper we analyze various models of the Single server queuing system with.Single-sever service node consists of a server plus its queue. If only one service technician, the machine shop model from section 1. 1 is a single-server queue.Queueing theory is the mathematical study of waiting lines, or queues. The MM1 queu...

The Worldwide Interoperability for Microwave Access (WiMAX) is the IEEE 802.16 standard. Scheduling in WiMAX become one of the most challenging issues, since it is responsible for distributing available resources among users to meet the Quality of Service(QOS) criteria such as delay, delay jitter, fairness and throughput requirements. However, no specific scheduling mechanism has been defined t...

With increasing demand for multimedia and realtime applications, local area network (LAN) technologies are rapidly being upgraded to support Quality-of-Service (QoS). Many QoS-enabled LANs are making use of resource allocation mechanisms that can discriminate among traffic classes of different priorities. When such LANs are interconnected by bridges to form an extended LAN, it is necessary to u...