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Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Internet,...
Anycast communication has been defined as a standard communication model of IPv6. The anycast routing problem with multiple QoS constrained is known to be NP-complete problem and we can't get satisfying results when using the precise method in polynomial time. In this paper, a QoS anycast routing algorithm based on ant colony optimization is proposed. This algorithm regulates the pheromone on the...
In order to provide high speed broadband access to users in next generation networks, Gigabit Ethernet-Passive Optical Network (GE-PON) has emerged as one of the most promising technologies. The evolution of the GE-PON technology permits the users to connect to the Internet via gigabit access networks, which contribute to the increase of the network traffic in not only downstream but also along the...
In beyond 3G networks the user will not be aware of the access network technology used to provide a telecommunications service. Heterogeneous network technologies will be seamlessly integrated in one "common'' access network, enabling users to move around and continuously receive their subscribed services. In a commercial environment, this network evolution requires that a telecommunications...
Recently Andrew et al. proposed the TCP evaluation suite to provide a common test suite for researchers designing new TCP extensions and AQM mechanisms. It defines network topologies, simulation scenarios i.e. traffic characteristic as well as evaluation parameters to provide a common testbed for all new enhancements. The presented remarks determine the essential features of a simulation environment...
In the Internet literature, the concept of efficiency is mainly associated with the bandwidth allocation policy under which the network operates. Consequently, efficiency is measured as the ratio of the aggregate out flow to in flow traffic in a network. In situation of a constant charge per unit bandwidth to the users, a high efficiency fulfills the network provider's objectives of profit/revenue...
In order to effectively manage network resources and to serve different traffic needs, several works have been done in the QoS area. Basically, ldquomulti-field (MF) packet classifiersrdquo classify a packet by looking for multiple fields of the IP/TCP headers, recognize which flow the packet belongs to, and according to this information, provide service differentiation in IP networks. However, for...
Actually, the 802.11 WLAN is considered as the IP-centric wireless access network and it is more asked to transport IP multimedia services such as IPTV, VoIP, etc. In this context, QoS provisioning in 802.11 WLAN for real-time traffic is becoming a main issue that should be addressed. In this paper, we propose a 802.11 MAC-level video frame grouping using cross-layer architecture. The MAC frame grouping...
The bandwidth is one of the most precious resources in mobile ad hoc networks (MANETs); their network protocols should therefore be able to achieve an increase in efficiency of bandwidth utilization. TCP, which implements flow control to regulate the network traffic, plays a significant role in determining the workload of the network. However, spurious TCP retransmissions can increase the link utilization...
To support the fast growing demand for transmission capacity, optical label switching technology (OLS) seems to be a strong candidate due to its ability to allow fast switching and resources provisioning as well as quality of service (QoS) support. Since TCP is and may remain the most popular traffic in Internet, TCP implementation becomes a major concern in OLS networking and operation. To take full...
Face-to-face communication over the Internet and network links can enhance the experience of distance learning, but such links can be poor at handling real-time data. Network bottlenecks, variable delays and network congestion can lead to the multimedia data being severely degraded and ultimately unintelligible. It is desirable to manage the use of the network traffic so as to maximize the trade-off...
In a bilateral teleoperated system, the signal transmissions between the operator and the slave manipulators have different QoS requirements in comparison to traditional network traffic. Running teleoperated systems over wireless networks poses more challenges in comparison to wired networks. The media streams involved differentiate themselves from other media types in that they require both reliable...
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