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Cloud federation is the way to integrate various cloud data centers from a single vendor or multiple vendors for better resource sharing. This paper looks in to various cloud federation aspects with associated challenges and solutions. Few key challenges mentioned are networking delay, data corruption while transit, handling the control signal, security, QoS guarantees, etc. Various state of the art...
This paper presents a DiffServ based adaptive QoS model for real-time interactive traffic in constrained bandwidth IP network without over provisioning the users. A WRR based QoS scheduling algorithm has been implemented to allocate the network resources to the users. A tuning parameter for VBR real-time traffic is also introduced in order to provide fair performance to the non real-time traffic as...
Increasing demands of ubiquitous services in wireless networks and evolution towards heterogeneous solutions has driven the necessity of developing efficient QoS aware vertical handoff (handoff between different networks) mechanisms. This paper proposes a QoS aware fuzzy rule based vertical handoff mechanism that makes a multi-criteria based decision, found to be effective for meeting the requirements...
A prominent function of a mobile host is seamless Vertical Handoff (VHO) that ensures application service continuity and quality. VHO decision algorithms that have been proposed in the literature consider parameters such as wireless channel quality (RSSI), cost, channel load, and available bandwidth. The mobile node runs the VHO algorithm autonomously and makes the decision. We highlight the fact...
In last few years there has been significant growth in the area of wireless communication. Quality of Service (QoS) has become an important consideration for supporting variety of applications that utilize the network resources. IEEE 802.16/WiMAX is a new network which is designed with quality of service in mind. This paper focuses on the comparison of quality of service parameters between different...
Present 3G Mobile Devices are often supports multiple communication technologies. If software developers want to control the configuration or monitor the characteristics of active Radio Access Technologies (RATs), their mobile applications will have to use different programming interfaces for each technology on various supported platform. We propose Modular Data Link Layer M-DALL for a NEXT GEN Mobile...
The interaction between multicasting and real-time multimedia streams poses various new and interesting problems in research on communication protocols and architectures. For example, display systems of heterogeneous users in the same session may have different or even varying latency, display resolution, and/or processing capabilities. In this paper, we propose a receiver-oriented resource reservation...
In this paper, we analyze the performance of peer-to-peer video telephony (VT) services over 1x EV-DO Revision A (DOrA) cellular networks. Through simulation studies in OPNET, we illustrate the throughput and delay of both video and voice data during multiple video telephony sessions under varying traffic density (number of users, video bit rate and frame rate). We also study the effect of application...
In this paper a novel interoperability strategy and architecture is described that guarantees the quality of service (QoS) requirements for applications originating in IEEE 802.11e based WLAN to a serving IEEE 802.16 based WirelessMAN and vice versa. The architecture for mapping QoS requirements makes use of inherent MAC layer convergence flexibilities available in these networks along with features...
The advances in wireless communications and growth of real-time applications have necessitated the development of wireless networks that can support high Quality of Service (QoS). Unfortunately, support for real time traffic in such networks is still in its infancy. In this paper, we introduce a new MAC protocol, called Multi-rate Multi-hop QoS-aware MAC Protocol (MMMP) for Ad hoc networks that concurrently...
With various wireless technologies developed, a ubiquitous and integrated architecture is envisioned for future wireless communication. An important optimization issue in such an integrated system is how to minimize the overall communication cost by intelligently utilizing the available heterogeneous wireless technologies while, at the same time, meeting the quality-of-service requirements of mobile...
We describe applications of policy-based reasoning algorithms in joint networking, including ground and airborne nodes, and illustrate how this approach can be used to enhance routing, network planning, mission planning, and spectrum allocation for tactical networking data links such as airborne networking waveform (ANW) and wideband networking waveform (WNW). The outcome of this research will be...
With the increase in need for wireless appliances to support mobility, many schemes have been proposed to improve the quality of service (QoS) levels during handoffs. Although these schemes have been proven to be very effective in improving the latency and packet loss during handoffs to a significant level, they are mainly limited to micro-mobility scenario. In the context of macro-mobility, mobile...
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