Quality of services for remote control in High Energy Physics experiments: a case study

Abstract The development of new advanced applications and the evolution in networking are two related processes which greatly benefit from two-way exchanges and from progress in both fields. In this study we show how mission-oriented networked applications can be effectively deployed for research purposes if coupled to the support of Quality of Service (QoS) in IP networks. QoS is one of the latest research topics in network engineering. In this article we focus on two specific examples of networked applications: remote instrumentation control and remote display of analysis data when applied for the support of experiments in the high energy physics field. In this paper we focus on the application requirements: the availability of a reliable transmission channel, limited one-way delay for timely interactions between servers and clients and fairness in network resources allocation in case of contention. The above-mentioned requirements can be addressed through the support of QoS, i.e. through the differential treatment of packets on the end-to-end data path. Several technologies and protocols for QoS support in packet networks have been devised during the last years by the research community. In this study we focus on the Differentiated Services (diffserv) approach, an architecture characterized by high scalability, flexibility and interoperability. In this paper we identify the application requirements and we quantitatively specify the corresponding service profiles. The diffserv network architecture needed to support the services is defined in terms of functional blocks (policing, classification, marking and scheduling) and of their placement in the network. Finally, for each of them the configuration best suited to remote control support is defined

Implementation of QoS onto virtual bus network

Quality of Service (QoS) is a key issue in a multimedia environment because multimedia applications are sensitive to delay. The virtual bus architecture is a hierarchical access network structure that has been proposed to simplify network signaling. The network employs an interconnection of hierarchical database to support advanced routing of the signaling and traffic load. Therefore, the requirements and management of quality of service is important in the virtual bus network particularly to support multimedia applications. QoS and traffic parameters are specified for each class type and the OMNeT model has been described

ANALISIS PENERAPAN DIFFSERV PADA TEKNOLOGI TCP/IP TRADISIONAL UNTUK JARINGAN PERANGKAT TELEKOMUNIKASI 3G BERBASIS IP DI PT INDOSAT, TBK. CABANG MALANG

ABSTRAK Teknologi komunikasi seluler generasi ketiga atau 3G memungkinkan pengguna untuk menikmati berbagai layanan komunikasi berkecepatan tinggi. PT Indosat, Tbk. sebagai salah satu operator seluler terkemuka di Indonesia membangun jaringan perangkat telekomunikasi 3G berbasis IP di Kota Malang yang terdiri dari pemancar seluler 3G (Node B)dan  Radio Network Controller(RNC) menggunakan perangkat jaringan dengan teknologi IP/MPLS untuk menjaga  Quality of Service (QoS)dari jaringan TCP/IP yang menjadi pondasi dasar dari komunikasi antar-perangkat telekomunikasi 3G. Perangkat jaringan dengan teknologi TCP/IP tradisional yang merupakan teknologi awal pengembangan sebelum teknologi IP/MPLS memiliki biaya yang lebih murah dan mampu mengimplementasikan metode diffserv  (Differentiated Service)sebagai salah satu metode untuk melakukan perbaikan Qualiy of Service (QoS)pada jaringan TCP/IP. Rumusan masalah dalam penelitian ini adalah bagaimana merancang dan membangun jaringan simulasi berskala kecil (testbed)TCP/IP tradisional serta melakukan pengujian dan analisis dari penerapan diffservpada jaringan tersebut. Dari hasil pengujian dan analisis didapatkan bahwa metode diffservdapat diaplikasikan pada jaringan testbedTCP/IP tradisional yang dirancang dan mampu melakukan perbaikan  QoSdengan menerapkan prioritas pada paket data berdasarkan  Differentiated Service Code Point(DSCP). Jaringan  testbedyang dirancang juga mampu menangani 3 Node Byang terhubung pada 1 RNC. Kata Kunci:Diffserv, QoS, TCP/IP, 3G. ABSTRACT The third generation mobile communication technology or 3G allows users to enjoy various high-speed communications services. PT Indosat, Tbk. as one ofthe leading mobile operators in Indonesia builds IP-based 3G telecommunications network in Malang, which consists of 3G cellular network transmitters (Node B) and  Radio Network Controller (RNC), over an IP/MPLS network that become the communication line among 3G telecommunication network elements. Network deviceswith traditional TCP/IP concept, which is the beginning of IP/MPLS development, has a lower implementation cost and a feature to implement DiffServ (Differentiated Services) to improve Qualiy of Service (QoS). The goal of this research is to design and build a small-scale traditional TCP/IP network (testbed) and performing analysis on the Diffserv implementation. The analysis shows that DiffServ can be applied to the designed network and able to improveQoS by making priorites based on Differentiated Service Code Point (DSCP). The testbed network is also capable of handling 3 Node B which is connected to 1 RNC. Keywords:Diffserv, QoS, TCP/IP, 3G

Comparaçao de plataformas para suporte de serviços diferenciados em redes IP

O principal objectivo deste trabalho é fazer a comparação, de um ponto de vista prático, de duas plataformas para o suporte de Serviços Diferenciados em redes IP: uma desenvolvida pelo ICA/EPFL para plataformas Linux, e a outra baseada em routers Cisco. Para além de comparar e estabelecer as estratégias de configuração em cada plataforma, funcionalidades Diffserv como a classificação, condicionamento de tráfego ou queuing, são testadas, avaliadas e discutidas. Particularmente, são testadas possíveis implementações dos PHBs EF, AFs e BE. As capacidades de oferecer largura de banda garantida, prioritização de tráfego, ou mecanismos adequados de condicionamento de tráfego são avaliadas, assim como o impacto que o tráfego de background tem no atraso dos pacotes de prioridade mais alta. A utilização extra do CPU provocada pelas funcionalidades Diffserv nos routers é também avaliada.EURESCOM P1006 / DISCMAN