today, in a competitive market, service organizations and producers have a great attention to optimization and customer satisfaction in order to become competitive. service organization must reduce the number of arrival, waiting time and service time in the queue to increase the customer satisfaction. in this paper by the aim of queuing theory we analyze the optimal amount of increment in a rep...

This paper proposes a novel scheme of continuous time assessment of user-level QoS and its continuous time mapping in audio–video transmission over IP networks. In the user–level QoS assessment, we time–continuously utilize the method of successive categories, which is one of the psychometric methods. We also adopt multiple regression analysis as the continuos time QoS mapping. By experiment, w...

The huge investment in 3G mobile licences is an incentive to develop extra services above and beyond basic telephony and data services. Service control provides an infrastructure to deliver services, particularly those of a real-time nature. This paper focuses on the progress in developing service control in the context of the 3GPP Release 4/5 network. To achieve the objectives for service evol...

If a set of agents tries to reach an agreement, there will exist an Agreement Space that models the maximum valid space according to the individual constraints of each agent, regarding the terms of the agreement. Previous approaches to Agreement Spaces model them by means of a Counsellor Agent that will help to agents trying to obtain an agreement knowing all the possible terms in that agreemen...

We calculate a fixed finite set of state space fragments for a service P , where each fragment carries a part of the whole behavior of P . By composing these fragments according to the behavior of a service R we build the state space of their composition P⊕R which can be checked for deadlocks and livelocks. We show that this approach is applicable to realize a “find” request by a service R with...

In order to help service designers build high-quality service models quickly and accurately, this paper presents a value-oriented iterative service modeling process. This modeling process combines service business perspective and service value perspective together, and it is executed interactively between service model space and service value space, simultaneously, some value-awareness activiti...

Drivers in urban neighborhoods who patrol streets, seeking inexpensive on-street parking create a significant fraction of measured traffic congestion. The pool of drivers patrolling at any time can be modeled as a queue, where ‘queue service’ is the act of parking in a recently vacated parking space and queue discipline is SIRO – Service In Random Order. We develop a queueing model of such driv...

quality of service (qos) is an important issue in the design and management of web service composition. qos in web services consists of various non-functional factors, such as execution cost, execution time, availability, successful execution rate, and security. in recent years, the number of available web services has proliferated, and then offered the same services increasingly. the same web ...

service oriented enterprises (soes) are subject to constant change and variation. in this paper, the changes are considered from an economic perspective based on service culture notion. once a change is implemented, the costs of some member services may increase, whereas the costs of some other services may reduce. we construct a game theoretic model trying to capture the possible conflicting i...