An Architecture of a Quality of Service Resource Manager Middleware for Flexible Embedded Multimedia Systems

2002 ◽  
pp. 36-55 ◽  
Author(s):  
Marisol García Valls ◽  
Alejandro Alonso ◽  
José Ruiz ◽  
Angel Groba
Keyword(s):  
Quality Of Service ◽  
Multimedia Systems ◽  
Resource Manager ◽  
Service Resource

HARMONY — AN ARCHITECTURE FOR PROVIDING QUALITY OF SERVICE IN MOBILE COMPUTING ENVIRONMENTS

2000 ◽  
Vol 01 (03) ◽  
pp. 247-266 ◽  
Author(s):  
A. M. LELE ◽  
S. K. NANDY ◽  
D. H. J. EPEMA
Keyword(s):  
Quality Of Service ◽  
Mobile Computing ◽  
Blocking Probability ◽  
Multimedia Systems ◽  
Entropy Model ◽  
Total Load ◽  
Backbone Network ◽  
Mobile Computing Environment ◽  
Computing Environments

Future mobile multimedia systems will have wearable computing devices as their front ends, supported by database servers, I/O servers, and compute servers over a backbone network. Multimedia applications on such systems are demanding in terms of network and compute resources, and have stringent Quality of Service (QoS) requirements. Providing QoS has two aspects. On the one hand, the QoS requirements for the relevant resources have to be defined and suitable policies for meeting these requirements have to be devised and analyzed. On the other hand, the architecture of the system components and the mechanisms enabling the implementation of these policies have to be designed. In this paper we propose an architecture called HARMONY for providing QoS in mobile computing environments. The HARMONY architecture is a layered architecture that provides mechanisms for the management of network and compute resources, in particular for call admission control taking into account the simultaneous requests for both types of resources by the mobile units. It also provides a mechanism for mobility management of mobile units as they move from one cell to another in a mobile computing environment. The network resources are reserved based on the Entropy model. In order to provide compute guarantees, we provide a novel scheme for off-loading tasks from the mobile units to the compute servers in the backbone network. We propose a load-balancing scheme to minimize the call blocking probability due to lack of compute resources, which redistributes the total load in the system across all compute servers so that these are equally loaded. Through a quantitative analysis of the HARMONY architecture we establish its effectiveness in providing quality of service in mobile computing environments.

scholarly journals FSB-DReViSeR: Flow Splitting-Based Dynamic Replacement of Virtual Service Resources for Mobile Users in Virtual Heterogeneous Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Jean Frédéric Myoupo ◽  
Vianney Kengne Tchendji ◽  
Yannick Florian Yankam ◽  
Joël Casimir Tagne
Keyword(s):  
Quality Of Service ◽  
End Users ◽  
Virtual Networks ◽  
Virtual Paths ◽  
Dynamic Replacement ◽  
Service Resource ◽  
Suitable Amount ◽  
Flow Splitting ◽  
Resource Replacement

Virtual networks are sets of virtual devices that are interconnected through a physical network to provide services to end users. These services are usually heterogeneous (VOIP, VoD, streaming, etc.), exploit various amounts of resources (bandwidth, computing power, servers, etc.), and have topologies different from those of the substrate network. These variations in requirements are traditionally known as the architectural flexibility of virtual networks. Each virtual service is provided through a server called a virtual service resource. When a virtual service resource can no longer provide a good quality of service to end users due to the traffic variation generated by their mobility, two approaches are commonly implemented: provisioning the virtual network with resources or replacing the virtual service resource by migrating the service to another node that offers the most suitable amount of resource to satisfy the quality of service (QoS). In this paper, we propose a flow splitting-based dynamic virtual service resource replacement approach that allows for virtual service replacement across multiple virtual paths. Our approach is based on a graph topology that differs from those in the literature, which are based on tree topologies. The simulations performed in this study show that our approach significantly reduces the virtual service resource replacement time compared to other approaches.

An Assessment of the Effect of Remuneration on the Construction Performances of the Professionals in the Nigerian Building Industry

2012 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
J.A.B. Awoles ◽  
C.A. Ayedun
Keyword(s):  
Quality Of Service ◽  
Resource Management ◽  
Service Quality ◽  
Significant Relationship ◽  
The Other ◽  
Building Industry ◽  
Resource Manager ◽  
Environmental Resource ◽  
Other Hand

Construction professionals are the authors on one hand and co-executors of constructionprojects on the other, therefore, the quality of the services expected of them in constructionproject delivery as environmental resource manager is key. This paper investigated whetherquality of service of the construction professionals in Nigeria is influenced by the level ofprofessional fees receivable for services rendered hence their resource management role. Thedeterminants of service quality are identified and their means of evaluation examined usingthe SERVQUAL; instrument used for measurement of the service quality on responses gotfrom a set of questionnaires administered on the construction stakeholders comprising of theconstruction clients on one hand and the construction professionals on the other hand inLagos, Nigeria with a view to assessing the perception of the clients regarding the quality ofservices being received from their construction professionals vis-a-vis clients expectations.The study revealed that there was no significant relationship between the level of fees paidand the quality of service rendered by the construction professionals as the result of theanalysis of variance between service quality gap and the various methods of fees paid is notreflected in the service quality of construction professionals.

Adaptable QoS Management Communication Architectures for User Perception

2003 ◽  
pp. 192-210
Author(s):  
G. Ghinea ◽  
J. P. Thomas
Keyword(s):  
Quality Of Service ◽  
Communication Protocol ◽  
Multimedia Systems ◽  
Management Communication ◽  
Adaptive Communication ◽  
Qos Management ◽  
Distributed Multimedia Systems ◽  
Qos Parameters ◽  
Communication Architectures

Distributed multimedia systems are characterised by a broad spectrum of quality of service (QoS) parameters which must be managed dynamically to ensure an acceptable user experience. Whilst there has been a considerable amount of work on QoS management itself, not the same can be said about the way that variations in QoS impact upon the user multimedia experience. We introduce the term quality of perception (QoP) to characterise the latter and, in this chapter, after a review of QoS-oriented communication architectures and protocols, highlight our experiences of using a specifically tailored adaptive communication protocol to provide an enhanced QoP.

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