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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

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Software Defined network-Enabled Multicast for Multi-Party Video Conferencing systems

Software Defined Network-Enabled Multicast for Multi-Party V...

引用

IEEE International conference on communications

作者： Miao Zhao Bin Jia Mingquan Wu Heather Yu Yang Xu America Innovation Research Center Huawei Technologies Bridgewater NJ Dept. of ECE Polytechnic School of Engineering New York University Brooklyn NY

Providing well-satisfactory multi-party video conferencing service is remarkably challenging, which demands not only high bandwidth but also low latency. Current commercial implementations typically use one or multiple multipoint control units (MCUs) as the central points for distributing video bit-streams to all participants in the conferencing session. Such MCU-based solution has limited control on quality of service (QoS), which may cause large delay, single-point malfunction and communication bottleneck for entire system. Recent years have witnessed the emergence of a new paradigm in networking, software defined networking (SDN), which advocates separating data plane and control plane, making network switches in the data plane simple packet forwarding devices and leaving a logically centralized controller to manipulate network behaviors. SDN provides the flexibility of changing underlying infrastructure and makes it possible to radically provide service/flow-aware QoS guarantee. In this paper, we propose a novel architecture for multi-party video conferencing by utilizing SDN-enabled multicasting, where SDN controller helps media controller to buildup multicast trees for video flows originated at video parties. To realize the architecture, we correspondingly propose a novel multicast construction and packing method, in which multiple source-based multicast trees are constructed and integrated to maximize system-wide utility while guaranteeing an end-to-end delay bound. Extensive simulations demonstrate that it could provide better video delivery compared to the conventional MCU-based solution in terms of video rate and delay in both sparsely and densely distributed networks.

关键词： Delays Receivers control systems Media Resource management Software Streaming media

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CyNC: a MATLAB/SimuLink toolbox for network calculus 07

CyNC: a MATLAB/SimuLink toolbox for network calculus

引用

Proceedings of the 2nd international conference on Performance evaluation methodologies and tools

作者： Henrik Schioler Hans P. Schwefel Martin B. Hansen Aalborg University Aalborg Denmark

ISBN: (纸本)9789639799004

This paper presents a graphical integrated modelling and performance-analysis tool based on deterministic network calculus (DNC) and implemented as an open source toolbox for the MATLAB/SimuLink environment. The paper introduces briefly the main concepts from network calculus and especially recent results for systems with cyclic dependencies, which appear in cases of cyclic data/work flow or counter directional resource and work flows. A number of network element types are supported including various arbitration/scheduling disciplines such as: Fixed Priorities, FIFO, TDMA, round robin/token passing and EDF along with packetization, flow control and flow convergence. These are all presented in the paper together with auxiliary tools like worst case backlog and delay calculations. Implementation details of general interest are presented along with illustrative examples demonstrating the virtues of the separate modelling elements and the overall tool framework. Discussion is provided concerning issues in system stability and the ability of DNC to provide usefull estimates of stability limits. Likewise current activities to support synchronous communication and flow control within the tool are presented.

关键词： tools network calculus real time systems modelling performance analysis

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Reliable data delivery for relay-based overlay multicast

Reliable data delivery for relay-based overlay multicast

引用

International conference on Advanced communication Technology (ICACT)

作者： Sung-Hei Kim Chang-Kyu Lee Shin-Gak Kang Electronics and Telecommunications Research Institute Daejeon South Korea

Although the IP multicast can be solution for various new emerging services which require active participation from many users, it does not work well in the current Internet which is based on the unicast communications [5]. Various alternative methods are being developed to overcome this limitation of the current Internet. One such method is an overlay multicast method. Most overlay multicast uses bi-directional TCP connection between the end-systems. Although TCP guarantees the ordered sequence and reliable transmission, TCP does not satisfy all properties of the overlay multicast in viewpoint of reliable transmission which includes establishment of new connection from new end-system. This paper introduces reliable data delivery scheme for relay-based overlay multicast. The proposed method is based on the architecture for n-plex multicast service which realizes simultaneous communication between multiple senders and multiple receivers [1][2].

关键词： Relays IP networks Web and internet services Unicast Telecommunication network reliability Bidirectional control Data communication TCPIP IPTV Peer to peer computing

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Development of MEC system for indigenous 5G Test-Bed

Development of MEC system for indigenous 5G Test-Bed

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International communication systems and networks and Workshops, COMSNETS

作者： Arzad Alam Kherani Gaurav Shukla Shashvat Sanadhya Neha Vasudev Muneeb Ahmed Ashish Singh Patel Rashi Mehrotra Brejesh Lall Huzur Saran Mythili Vutukuru Abhishek Singh Sushila Seshasayee Vinodh R Viswakumar Kishore Loganathan Bharti School of Telecommunication Technology and Management IIT Delhi India IIT Bombay India Centre of Excellence in Wireless Technology Chennai India

ISBN: (数字)9781728191270

ISBN: (纸本)9781728191287

Multi-access Edge Computing (MEC) is an evolving technology and considered as one of the critical enablers for technologies to meet the IMT definition of 5G communications. It integrates the service provider's network with the high-performance computation facility to cater to various applications such as augmented reality, vision applications, etc., at the network edge. Thus, reducing the overall latency and preserving the bandwidth to send the complete data to the centralized data centers for processing instead. Furthermore, MEC opens up tremendous business opportunities for telecommunication companies by offering a service platform for deploying various services specific to consumers and industry at the network edge. In this work, we have demonstrated a full-fledged MEC architecture, including its entities, and integrated with 5G core following ETSI 5G specification with an application deployment use-case. The various MEC and 5G core components are instantiated in the virtual machine as a guest; the complete data path and control path is established between all core components following a service-based architecture. The MEC system developed is a part of the indigenous 5G Test-Bed project and follows the ETSI architecture. The developed system is suitable for executing various applications that require data offloading, extensive storage, and computing resources. Thus, our working MEC system establishes a proof of concept and closely resembles a real-world deployment of MEC system in 5G environment.

关键词： Industries Data centers 5G mobile communication Computer architecture Companies Virtual machining Edge computing

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Slice Aware Framework for Intelligent and Reconfigurable Battlefield networks

Slice Aware Framework for Intelligent and Reconfigurable Bat...

引用

MILCOM, Military communications conference

作者： Anthony Castañares Deepak K. Tosh Charles A. Kamhoua US Army Futures Command Combat Capabilities Development Command Data & Analysis Center (FCDD-DAC) White Sands Missile Range NM USA University of Texas at El Paso El Paso Texas USA US Army Futures Command Combat Capabilities Development Command Army Research Laboratory (FCDD-ARL) Adelphi MD USA

Modern day tactical battlefield networks are typically not designed specific to the operational mission they support. These tactical networks are usually large, flat, non-segmented, absent of a robust cybersecurity response process, and overloaded with heterogeneous systems with various bandwidth and Quality of Service (QoS) requirements. These conditions create poor battlefield network performance and introduce significant risk to commanders and their Warfighters. To address these deficiencies we have designed a framework that uses network slicing to address many of the cybersecurity and performance issues unique to modern day tactical battlefield networks. Novel communication technology in 5G networking has the potential to be adapted to work with existing and next-generation tactical radio technologies to create network slices that provide high security, strong segmentation, and guaranteed quality of service performance in both intra and inter-slice communication. Our novel framework contains three components: 1) An intelligent network slice controller that dynamically manages the creation, management, security, and topology of tactical battlefield network slices; 2) a decision making system that continuously analyzes the battlefield network and suggest dynamic reconfiguration based upon network changes, threats, losses, or mission modifications, adjustments, or pivots; and 3) a network slice broker and orchestrator that implements the slice reconfiguration in real-time when it is necessary. In addition to the framework described in this paper, the applicability and contributions to Joint all Domain Command and control (JADC2) are presented as well as potential challenges in our future work.

关键词： Military communication Intelligent networks network topology network slicing Decision making Quality of service Real-time systems

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Delay analysis of optical burst switching networks

Delay analysis of optical burst switching networks

引用

IEEE International conference on communications (ICC)

作者： Hai Le Vu A. Zalesky M. Zukerman Z. Rosberg J. Guo T.W. Um ARC Special Research Center for Ultra-Broadband Information Networks Department of Electrical and Electronic Engineering University of Melbourne Melbourne VIC Australia Department of Communication Systems Engineering Ben-Gurion University of the Negev Beersheba Israel Information and Communications University Taejon South Korea

This paper proposes a new optical burst switching (OBS) paradigm known as dynamic two-way reservation OBS (DTWR/OBS), in which the burst length is dynamically determined at an ingress router, according to the minimum length reservation period available on each wavelength channel within a lightpath, from the ingress router to the egress router. The dynamic nature of DTWR/OBS ensures the packet transmission rate is controlled at the ingress routers, based on the level of network congestion. This increases network utilization and eliminates burst blocking due to wavelength contention. An analytical model for a single isolated optical cross-connect (OXC) is derived to determine the waiting time distribution of an arbitrary IP packet at the ingress router using the proposed DTWR/OBS. The accuracy of the analytical model is confirmed by simulations.

关键词： optical burst switching optical buffering Lighting control Analytical models Quality of service all-optical networks optical fiber networks Delay Telecommunication switching IP networks

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FMC: The Convergence of networks, Devices and Services

FMC: The Convergence of Networks, Devices and Services

引用

International conference on Digital Telecommunications (ICDT)

作者： Abdulrahman Yarali Anna Cherry Babak Ahsant Telecommunication Systems Management Murray State University Murray KY USA Wireless Mobile Department Southem Illinois University Carbondale Carbondale USA

As communications services are evolving, users are increasingly faced with a confusion of devices, subscriptions and numbers. Consumers are growing to expect ubiquitous, constant connectivity and access to all manner of information applications. Service providers, large and small, must simultaneously find ways to offset the declines in traditional sources of revenues while drive top-line growth. Fixed Mobile Convergence (FMC) solutions are promising to offers advantages for both consumers and service providers and is gaining momentum in the marketplace as operators are realizing the market opportunities for creating new revenue-generating services. FMC solutions are promising to deliver the long awaited hand off of calls/calling features between wire-line and wireless networks. This article first defines the concept of FMC and it then several prominent concepts in the fixed mobile-convergence are analyzed. The article l addresses the business model, architecture, competitive and technological issues and summarizes the progress being made toward this network evolution.

关键词： Convergence Multiaccess communication Throughput Wireless networks Downlink Performance analysis 3G mobile communication Degradation Interference Clutter

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Maximal network for best effort services with fair availability

Maximal network for best effort services with fair availabil...

引用

International conference on Computer communications and networks (ICCCN)

作者： T. Kurimoto T. Shimizu R. Kawamura Media Networking Laboratory NTT Optical Network Systems Laboratories Nippon Telegraph and Telephone Corporation Japan

ISBN: (纸本)0818690143

The Internet was not originally designed to prevent malicious users from securing more resources than other users. Although the best effort service offered by the Internet is quite well known, realizing fair availability in the best effort service is becoming necessary. Accordingly, this paper proposes the maximal network that realizes fair availability. This new concept has two points (1) all users are guided to use some form of (adequate) rate control by the incentives of the proposed maximal network (2) the fair availability between rate controlled users is provided. As guidance, the proposed network penalizes users who refuse to use rate control. Using a distributed algorithm to realize max-min distribution, the proposed network offers fair availability. Its implementation is described and its feasibility is evaluated by computer simulations. It is shown that fair availability can be realized. Lastly, the concept of multi-class best effort service is proposed and simulations show that this service is possible in the maximal network.

关键词： Availability Internet IP networks Transport protocols communication system control Bandwidth Proposals Throughput Application software Telecommunication traffic

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Formalization of a security access control model for the 5G system

Formalization of a security access control model for the 5G ...

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International conference on the network of the Future (NOF)

作者： Luis Suárez David Espes Frédéric Cuppens Philippe Bertin Cao-Thanh Phan Philippe Le Parc IRT b<>com - Cesson-Sévigné France

ISBN: (数字)9781728180557

ISBN: (纸本)9781728180564

The race for implementing communication services over 5G has already begun. For this, network coverage is needed and resource sharing is a way to achieve it. Therefore, each provider enforces its own security requirements. Under this scenario, it is necessary to consider security access mechanisms and policy rules, to regulate how interconnections are made between the shared network functions and how to allow specific traffic. The existing models do not address all the needs inherent to the 5G architecture, such as multi-tenancy, multi-domain and multiple security levels. To solve this challenge, this paper defines a novel access control model for 5G, leveraging on the best characteristics of traditional access control models used in operating systems and cloud scenarios. The security properties in our model obey the functional requirements within the 5G system as well as towards the customers. The actions and type of traffic of the system can be specified and enforced via an access control policy. Besides addressing the 5G system, our innovation is general enough to be applied over other types of architectures, proving its scalability and capability to incorporate more security features. To solve this challenge, this paper defines a novel access control model for 5G, leveraging on the best characteristics of traditional access control models used in operating systems and cloud scenarios. The security properties in our model obey the functional requirements within the 5G system as well as towards the customers. The actions and type of traffic of the system can be specified and enforced via an access control policy. Besides addressing the 5G system, our innovation is general enough to be applied over other types of architectures, proving its scalability and capability to incorporate more security features. Besides addressing the 5G system, our innovation is general enough to be applied over other types of architectures, proving its scalability and capability to incor

关键词： Access control Technological innovation 5G mobile communication Scalability Operating systems Resource management Stakeholders

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Scalable Markov Chain Based Algorithm for Fault-Isolation in Autonomic networks

Scalable Markov Chain Based Algorithm for Fault-Isolation in...

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2010 IEEE Global Telecommunications conference GLOBECOM 2010

作者： Nikolay Tcholtchev Agnieszka Betkowska Cavalcante Ranganai Chaparadza Fraunhofer Institute of Open Communication Systems (FOKUS) Berlin Germany Telcordia Poland Poznan Poland

Research in the area of Autonomic networks is on the rise. Autonomicity - realized through control loops, is an enabler for advanced self-manageability of network nodes and devices. Therefore, the specification and design of autonomic behaviors is required for each of the management functions defined by the well established FCAPS network management framework (Fault-, Configuration-, Accounting-, Performance- and Security-Management). In the context of Autonomic Fault-Management, mechanisms and algorithms are required that enable efficient and scalable interactions among the Fault-Management processes defined by the TMN (Telecommunications Management network) standard. TMN defines Fault-Detection, Fault-Isolation, and Fault-Removal as the processes involved in Fault-Management. Therefore, in Autonomic networks, some capabilities of Fault-Isolation must be in-built into a node and into the whole fundamental network architecture (apart from those aspects handled in the management plane), and its results must be fed into the embedded automatic Fault-Removal mechanisms. This imposes some scalability requirements on the employed algorithms. In this paper, we propose a novel scalable Markov Chain based algorithm for on-line Fault-Isolation. Furthermore, we analyze its computational and space complexity and evaluate its fault identification capabilities, as well as scaling properties on potential issues within an IPv6 network.

关键词： Markov processes Peer to peer computing Bayesian methods Monitoring Complexity theory Fault diagnosis Cognition

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