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The increased deployment of real-time video applications, including IPTV in home networks and remote monitoring in Internet of Things, requires new routing mechanism to support rapid and reliable real-time traffic transmission, especially in the bandwidth-limited and high link loss rate networks. In this paper, we study the problem of reliable multi-path routing with bandwidth and delay constraints...
This paper presents a trust-based QoS management implementation to assure trust and security of the IP network. In this architecture, every IP packet is forwarded and queued by its trust-value, which is the quantification of the network's expectation of this packet's behavior in networks. We also outlined the deployment of the trusted routers which carry out this algorithm. At last we provide the...
In order to become truly ubiquitous, the Internet of Things (IoT) has to evolve to provide connectivity anytime, any place, for any thing. IEEE 802.15.4-based wireless personal area networks (WPANs) is a preferable communication method for IoT. Wireless personal area networks (WPANs) are used to convey information over relatively short distances. Connections effected via WPANs involve little or no...
In an integrated fiber and wireless access (FiWi) network, multi-path forwarding may be applied in the wireless subnetwork to improve throughput. Due to the delay difference along multiple paths, reordered packets of a flow may arrive at the Optical Line Terminal (OLT) waiting for dispatching to the Internet, which may deteriorate the TCP performance. As all traffic in a FiWi network is sent out through...
Delay/Disruption Tolerant Networks (DNTs) enables nodes to communicate by means of asynchronous sending messages without the need for an end-to-end path. In this paper, we study the problem of multicasting in DTNs. Several schemes have been proposed for multicast routing assuming the group of message receivers is known by sender, and the group members do not change during the process of message delivery...
Multipath inter-domain routing can solve many technical flaws which have been exposed in BGP, but the market-driven factors have more direct relationship with its deployment. In order to analyze impact of these market-driven elements, this paper established an optimization model for Internet service provider (ISP) revenues based on user's utility function. Then, the solution using Lagrange multiplier...
In this paper, we study the network queuing effects on the VoIP delay and jitter. Two service polices, FIFO and Differentiated Service (DiffServ), are studied with repect to the queuing delays of VoIP packets. First, we present our assumptions for delay characterization. Then, we provide a model for the traffic flow. We create a ??Markovian+Deterministic (M+D)?? model in order to represent the traffic...
Anycast communication is a new Internet service defined in IPv6, and it can make a host communication with the one ldquonearestrdquo member in a group of servers. 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...
After analyzing the rule of TCP congestion window protocol based on AIMD, the paper deduces the requisite route buffer and queuing delay of standard TCP and N-TCP when link reaches 100% utilization rate, and discusses the effect to the two achieving throughputs (bandwidth utilization) when the router buffer changes. Theoretical analysis and simulation show that, with the router buffer decreasing and...
We consider multi-rate peer-to-peer multi-party conferencing applications, where different receivers in the same group can receive videos at different rates using, for example, scalable layered coding. The quality of video received by each receiver can be modeled as a concave utility function of the video rate. We study and address the unique challenges introduced by multi-rate setting as compared...
Bandwidth-delay-constrained multicast routing problem is an NP-complete problem. In this paper, we propose a QoS multicast routing algorithm based on artificial fish swarm optimization. Meeting with the bandwidth-delay-constrained, the proposed algorithm can search the least-cost multicast routing tree quickly. Simulation results show that this algorithm has high reliability and good performance of...
Anycast communication is a new Internet service defined in IPv6, and it can make a host communication with the one "nearest" member in a group of servers. 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, an improved ant colony optimization algorithm...
We propose a novel approach using active probingand learning techniques to track minimum delay pathsfor real-time applications in service overlay networks.Stochastic automata are used to probe paths in a decentralized,scalable manner. We propose four variationson active probing and learning strategies. It canbe proved that our approach converges to the user equilibriumfor minimum delay routing. The...
Wireless mesh network (WMN) has become a popular access network architecture. But because of its multi-hop nature, co-channel interference and contention, the attainable capacity of a wireless node in a WMN is significantly less than the radio capacity. We propose a overlay architecture for a WMN, where a wireless-ring (WRing) is deployed over the regular mesh for carrying wireless mesh traffic only...
Multimedia applications are becoming more and more popular on today's Internet. Given the enormous development costs and less flexibility, traditional monolithic based approaches are not suitable for building large-scale multimedia systems. By composing of distributed, autonomous services dynamically to provide more complex tasks, service composition provides an attractive way for building large-scale...
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