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The research trends in computer and wireless communication networks are growingly facilitated with the emergence of various Network Simulation tools. Network simulation software enables users to model network behavior demonstrating the packet transmission behavior and interaction amongst the nodes. These models are further used to analyze and predict the behavior of a computer network on various devices...
Mobile data traffic has increased drastically during last few years and expected to increase multifold in the coming years. Heterogeneous wireless networks have made it possible to have simultaneous traffic flows on all available wireless accesses. IP Flow Mobility (IFOM) which has been standardized from 3GPP Release 10 provides possibility to seamlessly transfer individual flows from one access to...
Data traffic in Mobile networks is increasing exponentially since last few years and is projected to increase multifold before the end of this decade. Evolution in heterogeneous wireless networks and network based mobility protocols has enabled the usage of simultaneous traffic flows on all available wireless accesses. Standardization of IP Flow Mobility (IFOM) from 3GPP Release 10 provides possibility...
Mobile traffic is growing exponentially and various kinds of traffic are emerging. It is hard to support new communication mechanisms in current cellular networks due to their inflexibility. And since link capacities are fairly close to the Shannon limit, further improvements seem to be expensive and will provide limited gains. As a result, people are working on redesigning cellular networks with...
Next generation network(NGN) is an All-IP based heterogeneous network which includes wired network, satellite network, wireless mobile network and so on. Comparing with the traditional wired network, in NGN, the classical TCP/IP is beginning to show signs of age. In order to cope with problems such as the poor performance of wireless links and mobile terminals, including the high error rate of wireless...
As the Internet continues to shape and reshape our lives, there is a parallel phenomenon taking place in wireless communication which is equally influential. Mobile communication has proved to be a major paradigm in the history of human communication. As both the Internet and mobile telephony continue their dramatic advances, there is a lot of requirement that should be available such as valid IP...
Real-time streaming over wireless networks is a challenging proposition due to the highly variable nature of wireless links and the resource-poor nature of mobile device. In such a context, transmission control schemes have to dynamically adapt both to the application requirements and to the channel conditions. In this paper, we propose an adaptive cross-layer quality-of-service (QoS) scheme for wireless...
Traditional approaches for testing MANET protocols and applications prior to field experimentation often involve simulation tools or small-sized physical testbeds. However, simulation tools typically do not run in real-time and rely on simplified models rather than a real system, while physical testbeds are prohibitively expensive to build and operate. A more practical method is to use emulation tools...
The current network management makes the service provider shift from the backend to frontend in order to provide the user satisfactory service. It also leads to the researchers pay the more efforts on the study of integration of QoE and QoS, which provide a better analysis of the service management from the user perspective and from the network perspective respectively. In order to ensure the quality...
The success of next generation wireless networks will rely much on advanced mechanisms for seamless mobility support among emerging heterogeneous technologies. Currently, mobile IP is the most promising solution for mobility management in the Internet. Several IP micro mobility approaches have been proposed to enhance the performance of mobile IP which supports quality of service, minimum packet loss,...
The following article is about the network quality of service issues, which is a set of technologies that enable to users obtain from the network predicted level of services basing on particular rules e.g. throughput, delay and jitter. An investigation and comparison of QoS mechanisms, focusing on the Internet protocols has been done here, to analyze and compare existing solutions. Beginning from...
Using the application of bluck data transfer, we investigate the performance of QoS-satisfied pathover for transport layer mobility scheme such as mSCTP in FMIPv6 envirmonment. We find that existing scheme has some defects in aspect of pathover and throughput. Based on this, we make a potential change to mSCTP by adding QoS-Measurement-Chunk, which is used to take into account information about wireless...
Modern networks provide QoS model to go beyond best-effort services, but current QoS models are oriented towards low level network parameters (e.g. bandwidth, latency, jitter) application developers on the other hand are interested in quality models that are meaningful to the end-user and therefore struggle to bridge the gap between networks and application QoS models. Network-aware applications are...
This paper discusses the inter-layer mobility and quality of service (QoS) support in a multi-tier Wireless Overlay Network (WON). It proposes integrated network architecture with layer manager for vertical handoff, switching and mobility management using Mobile IP protocol. Various functionalities of the Layer manager are implemented as modular blocks and are distributive over the gateways in each...
The joint tactical radio system (JTRS) program is developing a set of mobile ad-hoc networking (MANET) waveforms, to provide the last tactical mile connectivity to the global information grid (GIG). JTRS networking services provide an Internet protocol (IP) networking stack and networking services that operate at open systems interconnection (OSI) layer 3 and below. Developers program the networking...
This paper presents the results of our computer simulation for delays experienced by voice packets over WiMAX 802.16e protocol running over an enterprise packet network connected to public internet. In the simulation we analyzed the effect of packet size, core network link speed, Internet service provider link speed, wireless network link speed, wireless distance, base station range, and distance...
The wireless network landscape is changing gradually from homogeneous to heterogeneous and future generation networks are envisioned to be a combination of diverse but complimentary access technologies, like GPRS, WCDMA/HSPA, LTE, WiMAX, and WLAN. One issue which has become apparent recently with the proliferation of different link layer technologies is how service providers can offer a consistent...
Resource reservation in mobile environments is an important task in the future when the userpsilas point of attachment to the network changes frequently due to mobility. One crucial issue of this task is to release unnecessary reservation along old path after departure of mobile node(s). Although this can be done automatically by a soft state mechanism, default soft statepsilas lifetime which is conceived...
Recent advances in wireless client devices and multimedia communications have motivated relevant standardization efforts, such as the IP Multimedia Subsystem (IMS) to support session control, mobility, and interoperability in all-IP next generation networks. Notwithstanding the central relevance of IMS for novel mobile multimedia services, IMS-based solutions still exhibit limited support for service...
Wireless mesh networks have recently gained a lot of popularity due to their rapid deployment and instant communication capabilities. Special routing protocols are employed, which facilitate routing between the Mesh Routers as well as between the Mesh Routers and the Mobile Nodes. This work addresses a framework of packet routing in the wireless mesh network. We investigate a cross-layer solution...
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