Member Login

E-mail:    Password:  




 TitleDate AddedCompany
whitepaper Long Term Evolution (LTE): A Technical Overview2008-12-16 Motorola
  This paper describes the system architecture and performance objectives of the next generation access-network technology being developed by 3GPP. It also discussed how mobility is handled in the new system. Motorola's role in this enhancement of 3GPP LTE technology was also explained. With the envisaged throughput and latency targets and emphasis on simplicity, spectrum flexibility, added capacity and lower cost per bit, LTE is destined to provide greatly improved user experience, delivery of new revenue generating exciting mobile services and will remain a strong competitor to other wireless technologies in the next decade for both developed and emerging markets.

Tags: Mobile and Wireless, Software Development Tools		   
whitepaper Resource-Aware Deployment and Configuration of QoS-Enabled Middleware2008-12-15 Vanderbilt University
  Ad hoc Deployment and Configuration (D&C) of fault-tolerance mechanisms can lead to unacceptable response times, overloads, and low-availability for soft real-time applications. This paper describes how the Quality-of-Service (QoS)-enabled middleware called DeCoRAM (Deployment and Configuration Reasoning via Analysis and Modeling) provides a holistic and automated solution to fault-tolerance and real-time D&C through two novel capabilities. First, DeCoRAM provides a deployment-time allocation and scheduling algorithm that maps passively replicated application components to appropriate hosts subject to their soft real-time requirements and determines the failover order of application replicas based on their worst case state synchronization delays. Second, DeCoRAM's model-driven D&C engine deploys and configures replicas for each application and provides resource-aware failover and delay-bounded state synchronization between backup and primary replicas.

Tags: Network Management		   
whitepaper SLA Requirement Generation and Implementation Algorithm Selection for Service Composition Based on QoS Reference Vector2008-12-11 Tsinghua University
  Under SOA, composite service is formed by aggregating multiple component services together in given workflow. One key criterion of this research is QoS composition. Most work on service composition focuses on the algorithms about how to compose services according to assumed service level agreement. This paper proposes to strengthen current service composition mechanism by adding generation of QoS requirement and its implementation algorithm selection based on the QoS reference vectors which are calculated optimally from the existing individual services' QoS by registry to represent QoS overview about the best QoS, the worst QoS, or the average QoS of all composite services.

Tags: Network Management		   
whitepaper Evaluation of Energy-Aware QoS Routing Protocol for Ad Hoc Wireless Sensor Networks2008-12-03 World Academy of Science, Engineering and Technology
  Many advanced Routing protocols for wireless sensor networks have been implemented for the effective routing of data. Energy awareness is an essential design issue and almost all of these routing protocols are considered as energy efficient and its ultimate objective is to maximize the whole network lifetime. However, the introductions of video and imaging sensors have posed additional challenges. Transmission of video and imaging data requires both energy and QoS aware routing in order to ensure efficient usage of the sensors and effective access to the gathered measurements. In this paper, the performance of the energy-aware QoS routing Protocol are analyzed in different performance metrics like average lifetime of a node, average delay per packet and network throughput.

Tags: Network Management, Network Management		   
whitepaper Towards a Meta-Negotiation Architecture for SLA-Aware Grid Services2008-11-20 Vienna University of Technology
  In novel market-oriented resource sharing models resource consumers pay for the resource usage and expect that non-functional requirements for the application execution, termed as Quality of Service (QoS), are satisfied. QoS is negotiated between two parties following the specific negotiation protocols and is recorded using Service Level Agreements (SLAs) standard. However, most of the existing work assumes that the communication partners know about the SLA negotiation protocols and about the SLA templates before entering the negotiation. However, this is a contradictory assumption, if one considers computational Grids and novel commercially oriented Computing Clouds where consumers and providers meet each other dynamically and on demand.

Tags: User Satisfaction		   
whitepaper Accurately Measuring Denial of Service in Simulation and Testbed Experiments2008-11-12 Institute of Electrical and Electronics Engineers
  Researchers in the Denial of Service (DoS) field lack accurate, quantitative and versatile metrics to measure service denial in simulation and testbed experiments. Without such metrics, it is impossible to measure severity of various attacks, quantify success of proposed defenses and compare their performance. Existing DoS metrics equate service denial with slow communication, low throughput, high resource utilization and high loss rate. These metrics are not versatile because they fail to monitor all traffic parameters that signal service degradation. They are not quantitative because they fail to specify exact ranges of parameter values that correspond to good or poor service quality. Finally, they are not accurate since they were not proven to correspond to human perception of service denial.

Tags: Intrusion - Tampering		   
whitepaper Secure Voice Over IP (VoIP) Solutions: Delivering a Robust, Secure VoIP Solution That Counters Both External and Internal Threats While Providing Superior Quality of Service2008-11-05 Alcatel-Lucent
  This paper discusses the key security challenges to consider when deploying VoIP solutions, and describes Alcatel-Lucent's VPN Firewall Portfolio and how it meets the security requirements of today's and tomorrow's VoIP networks and applications. Creating high levels of security is essential to fully leverage VoIP technology and the many advantages it offers over traditional wireline solutions. To meet this challenge, Alcatel-Lucent's VPN Firewall Portfolio provides a complete solution to cope with the evolving threats that can slow down the deployment and use of VoIP applications. The portfolio combines the Alcatel-Lucent Security Management Server, Alcatel-Lucent VPN Firewall Brick appliances, and deployment of the Alcatel-Lucent IPSec Client.

Tags: Network Management, Security Administration		   
whitepaper Advanced QoS Methods for Grid Workflows Based on Meta-Negotiations and SLA-Mappings2008-11-05 Vienna University of Technology
  In novel market-oriented resource sharing models, resource consumers pay for the resource usage and expect that non-functional requirements for the application execution, termed as Quality of Service (QoS), are satisfied. QoS is negotiated between two parties following the specific negotiation protocols and is recorded using Service Level Agreements (SLAs). However, most of the existing work assumes that the communication partners know about the SLA negotiation protocols and about the SLA templates before entering the negotiation. However, this is a contradictory assumption, if one considers computational Grids and novel, commercially oriented computing Clouds where consumers and providers meet each other dynamically.

Tags: User Satisfaction		   
whitepaper Towards Scalable End-to-End QoS Provision for VoIP Applications2008-10-16 Institute of Electrical and Electronics Engineers
  The growth of the Internet and the development of its new applications have increased the demand for providing a certain level of resource assurance and service support. Recently, the IETF have proposed a new QoS architecture that implements IntServ over DiffServ in order to provide an end-to-end QoS for scalable networks. Hence, it became possible to provide and support a certain level of QoS for some delay sensitive and bandwidth-demanding applications such as Voice over Internet Protocol (VoIP). With regard to VoIP applications, delay, jitter and packet loss are crucial issues that have to be taken into consideration for any VoIP system design and such parameters need a distinct level of QoS support.

Tags: Network Management, Software Development Tools		   
whitepaper Long Term Evolution Protocol Overview2008-10-01 Freescale Semiconductor
  This paper provides an introduction to how the Long term evolution (LTE) protocol stack operates. Because the final 3GPP specification will cover tens of thousands of pages, this paper touches only on the highest levels of protocol operation. The paper discusses the history and application requirements that determine the functions and priorities of LTE, examines the protocol stack in terms of the time domain and in terms of information moving through the stack, and finally discusses more specialized aspects of the standard such as scheduling and quality of service, management and control functions, handovers and power save operation.

Tags: Mobile and Wireless