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We propose a novel distributed on-demand routing scheme for multimedia communication through Cognitive Radio Networks (CRN). The basic technique is to effect the multimedia communication through multiple routes between the source and the destination nodes based on Sample Division Multiplexing (SDM) [2] such that the sum of flow along all such routes is equal to the required flow between the source-destination...
Information centric networking is proposed to deal with the inefficiency of content distributions in traditional networks. It replaces the current host-centric communication paradigm with the content-centric one, so all the network devices can identify and cache the contents passed by.
VANET is an emerging technology to achieve intelligent inter-vehicle communications, consistent internet connectivity resulting in improved road safety, more important alerts and accessing comforts and entertainments. Within VANETs, Vehicle mobility leads to constant breakage of communication links between vehicles. Such link failures require a direct response from the routing protocols. This leads...
The router buffer sizing problem is a vital problem to the performance of the Internet. The traditional rule-of-thumb is that the router buffer size should be equal to the bandwidth-delay product (BDP) of a link. Recent studies show that the router buffer size can be significantly smaller than the BDP without causing negative impact on the TCP performance in the Internet. But a fundamental assumption...
Cognitive radio technology can be used to solve the problems of limited available spectrum and inefficient spectrum usage by adaptively changing transmission parameters. By utilizing CR technology for dynamic and distributed multi-hop networks, cognitive radio ad hoc networks can efficiently utilize free wireless resources. However, the routing protocols for cognitive radio CSMA/CA ad hoc networks...
Interdomain Multipath Routing, which enables a source AS to use more than one paths for a destination AS, is a promising technique for achieving high bandwidth, high resiliency and fast reaction to failures. However, previous interdomain multipath routing protocols often produce paths which might share bottlenecks, which makes them vulnerable to failure on bottlenecks and therefore inefficient to...
Computer architectures have evolved to structures where communication has become an essential part of the system and most of it currently takes place inside the chip. The number of on-Chip cores and the available off-chip bandwidth is not growing at the same rate. This demands for the inclusion of more sophisticated memory hierarchies inside the chip to deal with off-chip latency and bandwidth problems...
Successive Interference Cancellation (SIC) is a new physical layer technique which enables the receiver to either partially cancel the interfering signals or receive more than one desired signal at a time. By fully exploring the potential advantages of SIC, we develop an SIC Aware Routing protocol, referred to as SAR, aiming at enhancing the overall end-to-end throughput. An SICable condition is defined,...
We describe and demonstrate fully distributed algorithms that enable cloud clients to select among a set of available computing clusters adaptively, based on measurements of cluster computing loads and the relative bandwidths of paths between the client and each cluster. These techniques are particularly important in cases where (1) clients connect to clusters over stressed wireless networks whose...
The purpose of this article is to present the results of deployment and benchmarking of multi-gigabit Intel-based software routers in real-world applications. There are two ways to achieve the router bandwidth over 1Gbit: using aggregation of multiple 1Gbit Ethernet adapters and using 10Gbit Ethernet NICs. Software routers are substantially cheaper then hardware routers which make them a cost effective...
Some of the attractive features of using Reverse Path Forwarding (RPF) method for broadcasting include reasonably low amount of memory necessary for storing the data structures in a router required by the protocol and ease of its implementation as it does not look for shortest path delivery. However, it generates quite a large number of duplicate packets resulting in poor bandwidth utilization. In...
In this paper, we address the quality aware routing issue in MANET: Mobile Ad hoc networks. The MANET network is based on dynamic radio links. Our contribution improves the multipath routing in Mobile Ad hoc networks based on the path quality, path stability and QoS awareness. Prediction methods are used in order to estimate the path quality. The paths will be sorted and weighted according to the...
This study presents a broad selection of methods and techniques for data transfers, starting with the TCP/IP protocol, its main enhancements, new non TCP protocols, and the class of applications and libraries able to sustain massive bulk transfers in HBDP networks. Distinctive features and comparison based on performance, effectiveness, efficiency and fairness are emphasized in each case. As a result,...
Name-based routing in content-centric networks leads to a paradigm shift from a host-to-host to a host-to-content communication model. However, name-based routing faces many challenges. In this paper, we mainly focus on the scalability challenge and address it via a hybrid, reactive routing approach, where we augment the content-centric networking design with an Infrastructure Information Base (IIB)...
Location-based services provide (and maintain) location information used by geographic routing protocols. Routing and location service are widely related, but handled separately in usual studies about Vehicular Ad hoc Network (VANET). In this paper, we propose a hybrid approach, denoted mobility-Prediction-based Hybrid Routing and Hierarchical Location Service (PHRHLS), coupling a VANET routing protocol,...
An analytical approach to quantifying the routing overhead in wireless ad hoc networks is presented in this paper. We find that in addition to the traditional control overhead and sub-optimal routing overhead, the retransmissions of discarded packets due to buffer overflow in receiver nodes on a route will consume extra bandwidth, which increasing the routing overhead. In this paper, we focus on the...
In this work, we consider the problem of providing QoS routing in wireless sensor network. Due to the dynamic nature of wireless network, it's a challenging issue to implement QoS routing in multi-hop network. We make following major contribut contributions in this paper. First, we propose and implement a QoS providing framework based on DiffServ model. Second, we implement bandwidth and ETX measurement...
VoIP traffic over Mobile Ad-Hoc Networks (MANETs) faces many interacting challenges such as the mobility of the nodes that leads to continuous link breakages, the restricted bandwidth availability, the different characteristics of the existing routing protocols, the used voice codecs, the number of the mobile nodes and the background traffic. These factors introduce variability in the latency and...
The current UPnP service discovery algorithm in the presence of the service can cause severe drops in the digital home network. The reason is that the root devices instantly send delay sending response messages and randomly select independent response message congestion through simulation analysis. To solve these problems, an improved UPnP service discovery algorithm was given. Considering the length...
Wireless mesh networks (WMNs) are taking advantage of multiple radio interfaces to improve network performance, and numerous routing protocols have been proposed for WMNs. However, these routing protocols can not perform well in the heterogeneous multi-radio environment with distinct bandwidth difference, for little attention has been paid to routing overhead balancing. To address this issue, we present...
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