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Wireless backhaul has been received much attention as an enabler of future broadband mobile communication systems because it can reduce deployment cost of pico-cells, an essential part of high capacity system. A high performance network in terms of high throughput, low average delay and low packet loss rate, is highly appreciated to sustain the increasing proliferation in multimedia transmissions...
In recent years, Internet Protocol (IP) telephony is becoming popular because it offers more flexibility in the implementation of new features and services. Session Initiation Protocol (SIP) is a peer-to-peer, multimedia signaling protocol standardized by the Internet Engineering Task Force (IETF) plays a vital role in providing services to IP telephony. SIP is ASCII-based, resembling HTTP, and reuses...
In this paper we propose a new architecture for sending, receiving and archiving of multimedia files over 4G MIPV6 network with an effective multiple authentication method. The two modes of mobile multimedia file transfer discussed in this paper are 1) Closed group network suitable for organizations and corporate 2) Peer to peer file transfer between mobile nodes. MIPV6 mobile network enables file...
Multimedia communication networks, such as the Internet, are heterogeneous in their nature due to the usage of different methods for content distribution. The efficiency of multimedia distribution depends on the variety of communication protocols that are simultaneously running (composed) over different network hosts in order to resolve packet conflicts. A very natural question that arises in such...
The existing routing protocols designed for real-time multimedia applications in sensor networks adopt comparatively simple routing models where fewer service metrics are considered. Furthermore, for the sake of route discovery or the acquisition of a target location, they usually need extra locating equipments or beacon exchanges to construct a coordinate system for each sensor node, which imports...
Tremendous efforts have been conferred towards the congestion control concern in mobile wireless networks while dealing with maximizing both throughput and fair bandwidth allocation. Unfortunately, this is made limited by the variable and unpredictable behaviour of such networks. In this paper we propose a new congestion control mechanism for multimedia traffic in mobile wireless networks. Our proposed...
This paper proposes a mechanism which allows extending IMS service delivery on the Internet using overlay networks. Dubbed Advanced Quality of Service (AQoS), this solution aims at dynamically providing alternate high-bandwidth routes on the Internet using overlay network measurements to improve connection QoS. The estimation of the achievable QoS in the overlay network makes it possible to adapt...
Explicit congestion notification (ECN) is a mechanism that can be used to provide early indication of impending Internet congestion, and as such can be used to reduce the latency and improve the throughput of applications using the Internet. This paper examines the impact of using ECN with quality of service classification for Internet paths that include a satellite delay. Specifically, it provides...
The following topics are dealt with: reliability; quality of service; computer networks; radio networks; telecommunication network management; communication theory; protocols; telecommunication network routing; OFDM systems; telecommunication channel; multimedia communication; and optical communication.
The introduction of multimedia capable sensors has posed new challeges for classic Wireless Sensor Networks that are henceforth required to provide both power and quality efficent routing. This paper proposes an innovative protocol for power and perceived QoS aware routing of multimedia content over Wireless Multimedia Sensor Networks. The proposed scheme comprises the advantages of both energy efficient...
With the technological changes on the horizon, there seems significant potential for availability of telecommunications access, and hence services. Many incumbent telecommunications operators are announcing a transition to so-called Next Generation Networks (NGN) to replace their existing networks. Such changes are expected to have significant implications in the way services are provided and the...
In this paper we propose a rapid-deployment service platform to facilitate the development and the distribution of communication services over IMS network. The mechanism and the architecture to achieve a rapid-deployment platform are discussed. Furthermore, we implemented the platform in an IMS application server (IP-SMS), which provides IP-based short message service over IMS networks. On top of...
The IP multimedia subsystem (IMS) is considered as a valid possibility to tackle the seamless provision of multimedia services in both packet switched and circuit switched networks. The session initiation protocol (SIP) is applied as a protocol for signaling, but is not yet used to fully exploit the potential of dynamic and context-aware service provision. In this paper we present a method to semantically...
Localized mobility protocols are designed to address many of the drawbacks such as additional signaling and over-the-air tunnel overhead associated with global mobility protocols like Mobile IPv4 and Mobile IPv6. Proxy Mobile IPv6 is one such network controlled localized protocol defined in the IETF Although Proxy Mobile IPv6 can resolve longer binding update and tunnel overhead related issues when...
Multimedia applications have been widely developed. These applications use TCP-friendly congestion control mechanisms. One of the congestion control mechanisms which multimedia applications use is the TCP-friendly rate control (TFRC). This mechanism is designed for wired networks which any packet loss indicates congestion loss and the sending rate is reduced correspondingly. In this paper, we propose...
The provision of innovating multimedia services is a high priority for service providers. Due to the the high traffic volume characteristics of multimedia content, decentralised services are a desired solution for multimedia scenarios. Based on the ongoing work of the IETF P2PSIP WG this paper defines a simple way to interconnect different domains using on peer-to-peer technology. The objective is...
Wireless sensor networks consisting of spatially distributed autonomous devices required to survive in unprotected environments. They are always susceptible to attack by malicious behavior of its routers (nodes) or external enemy nodes which could negatively affect secured routing and QoS and hence, vital wireless multimedia applications. In recent times, a lot of specific severe attacks have been...
Development of multimedia services, e.g. video on demand or IPTV and their flow transport over the IP multi-domain networks with quality of services (QoS) guarantees require appropriate management and control of QoS at service and also at the network level. The management and control system must first support cooperation between several independent network domains at service provisioning level while...
Mobile IPv6 and SIP are protocols designed to support different types of mobility. Mobile IPv6 has been used to support mobility in IP networks and SIP has been used for voice over IP applications. It is the signalling protocol of the IP multimedia subsystem (IMS). In this paper both protocols have been simulated and compared in order to observe their performance for voice over IP (VoIP) applications...
The following topics are dealt with: IP network security; wireless security; network topology; power line communication; intelligent transportation; cryptography; P2P streaming; wireless communication; wireless channel; network traffic; routing protocol; security protocols; resource management; ad hoc network; wireless sensor network; MAC protocol; power control; QoS; scheduling; coding; modulation;...
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