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A MANET or Mobile Ad-Hoc Network is decentralized in nature and it is basically a collection of heterogeneous mobile nodes which are autonomous and can communicate among themselves over the wireless link. In this infrastructure-less network, all the nodes dynamically route the packets by themselves with help of some protocols for sending or receiving the packet information. The ZRP or Zone Routing...
Vehicular Ad-hoc Networks (VANETs) experience diverse network environments ranging from infrastructure based with dense connected vehicle communication in urban highways to infrastructurless with sparse connected vehicle communication in rural highways. Routing protocols in such challenging environments should be adaptive to work with or without a fixed infrastructure under a quickly varying connected...
Available smartphone« and smart objects can use short range connections like Wi-Fi and Bluetooth as a communication technique to exchange information with nearby devices. Those techniques are used in cases of absent end-to-end connection such as in Delay Tolerant or Opportunistic Networks. The study of message transmission processes and contact information in such networks has gained more attention...
New Long-Range radio technologies have recently emerged in the IoT landscape. These technologies work in the Sub-GHz bands, allowing low-power communications over long distances. They are typically based on star-topology networks, where nodes send the data directly to a base station connected to the Internet. One of such technologies is LoRa. Enabled LoRa-based multihop communications would open up...
In recent years, unmanned aerial vehicle(UAV) has been developing rapidly which is also widely concerned in the military field, but the research on the communication services for the battlefield is seriously lack of development. Multi-UAV cooperative applications have better performance than single UAV, but the cooperative communication problems between UAVs need to be solved urgently. Therefore,...
Multicast is widely deployed in data centers for point-to-multi-point communications. It has an established set of control protocols such as IGMP and PIM that has limitations around the lack of bandwidth awareness when establishing the multicast trees. This could leads to over-subscription of network links and packet loss impacting user quality of experience. Other existing multicast issues are around...
Requirement for high bandwidth internet traffic is growing rapidly now-a-days. Utilization of the available resources becomes troublesome due to rise in the number of users. So it is important to provide the resources efficiently. To solve the problem of resource provisioning, many developments have been made by the researchers. During working hours, the scheduled traffic is huge and sluggish during...
A number of geolocation-based DTN (Delay Tolerant Networking) routing protocols have been shown to perform well in selected simulation and mobility scenarios. However, the suitability of these mechanisms for widely-available inexpensive GPS hardware has not been evaluated. In this brief paper we evaluate the effect of GPS positional error on our own and previously existing geographic routing protocols.
Resource competition, a serious problem in many actual networks, largely influence the network performance and may lead to network congestion. The allocation of link's bandwidth resource is a key process to relieve the situation. Researchers have put forward some strategies to improve the network capacity. They thought that the allocation strategies were determined by the importance of each link which...
Reverse Path Forwarding based multicasting used in Distance Vector Multicast Routing Protocol (DVMRP) has the major drawback of generating large number of duplicate and prune packets. Use of the concept of pseudo diameter reduces the number of duplicate packets. The reason is that pseudo diameter helps in the reduction of the scope of travel of a packet. In this work a new approach of multicasting...
In this paper, we propose a modeling approach for a Content-Centric Networking (CCN) network by considering the dynamics of its transport layer protocol. Transport layer protocols for CCN have mainly been investigated through simulation experiments because CCN itself is a complicated network architecture compared with IP, and the complex interaction between CCN caching and the behavior of a transport...
Wireless links are inherently lossy due to channel fading or interference. Previously, duplicate packets were transmitted on multiple routes of lossy mobile ad hoc networks (MANETs) to enhance reliability. In this paper, a multicast routing protocol that constructs multiple multicast trees and employs network coding is proposed for lossy MANETs, where each multicast tree can satisfy a predefined percentage...
In this paper the mathematical model of multicast routing of flows with support shared explicit reservation of link resources is proposed. The proposed model consists of a linear expressions, which are responsible for providing the connectivity of the calculated multicast routes, and also the absence of loops in them. The novelty of the model is the using of conditions of prevention the congestion...
The Fast ReRoute flow-based model has been improved, where the node and link protection schemes in the linear form were formulated with the implementation of single path and multipath routing strategies. The use of linear-quadratic optimality criterion was substantiated, and the system hierarchy relations of weight coefficients in the objective function were determined with the aim to ensure maximum...
Typically, in low-power and lossy networks nodes communicate with servers over the Internet. Nodes collaborate wirelessly to relay their data to a gateway. A large-scale network can have multiple gateways. Selecting a proper gateway can have an immense impact on the network's performance. In this paper, we present joint routing and gateway selection protocols for low-power and lossy networks. To analyse...
A lot of researches exploit the flexibility of Software-Defined Networking (SDN) to conduct traffic engineering in order to improve network performance and enhance robustness to failures. As the upgrade of a traditional network to a full SDN deployment is an incremental process, the coexistence of SDN switches and legacy switches forms a hybrid SDN. Due to the different forwarding characteristics...
SINET5 is a new 100-Gbps-based academic backbone network, which started full-scale operations in April 2016. It uses multi-protocol label switching-transport profile (MPLS-TP) systems and reconfigurable optical add-drop multiplexers (ROADMs) to create a nationwide network and has more than 50 backbone IP routers to provide a wide range of services, such as several virtual private network (VPN) services...
New applications where anyone can broadcast video are becoming very popular on smartphones. With the advent of high definition video, ISP providers may take the opportunity to propose new high quality broadcast services to their clients. Because of its centralized control plane, Software Defined Networking (SDN) seems an ideal way to deploy such a service in a flexible and bandwidth-efficient way...
Global IP traffic is forecast to triple by 2020 to reach 2.3 ZB per year. Such an explosion will inevitably be the catalyst of Operator infrastructure transformation. In this context, SDN is the technology that is shaping the future of carriers' networks. It offers the opportunity to implement more powerful control algorithms. In this perspective, we put forward a SD-WAN architecture to enhance the...
With the increasing demand for communication quality, improving the service quality has become the focus and difficulty of the research. The traditional method has its limitations. The cross layer design method can break the barriers between layers, and ensure the quality of service transmission. This article proposes a cross-layer scheme called Ad hoc On-demand Distance Vector Routing Cross-layer...
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