transport protocols for ad hoc networks

... not already seen the packet In symmetriclink ad hoc networks, an intermediate MMA can deliver the RREP packet on the reverse route of the RREQ packet, while in asymmetric link ad hoc networks, ... Overlay multicasting can improve routing efficiency by exploiting the broadcast nature of ad hoc networks For instance, a one broadcast packet can be received simultaneously by two neighboring group ... Multicasting (IPLM) Associativity-Based Ad Hoc Multicast (ABAM) Protocol Description ABAM [19] is an On-Demand Source- based multicast routing protocol for mobile ad hoc networks. A multicast tree rooted

Ngày tải lên: 21/06/2014, 22:20

... getNoise(NoiseInfo∗ni){return 0; } RadioChannelManager∗rcm; double getFastFading(){ return 1; } double getFastFading(FastFadingInfo∗ ffi) { return 1; } double getSlowFading(){ return 1; } double getSlowFading(SlowFadingInfo∗sfi){ ... depending on the type Trang 7InterfererNoiseInfo RcmModule FastFading FastFadingInfo RadioChannelManager SlowFading SlowFadingInfo GroundBasedShadowing UwbInterfererNoise PathLoss PathLossInfo doublex1, ... protocol when subject to radio channel effects Such a header is added to the bytes of DL-PDU payload, similarly to the UDP and IP headers as presented in Figure 2 This DL-PDU payload includes the bits

Ngày tải lên: 21/06/2014, 23:20

... representative ad hoc routing protocols in the literature, including the well-known AODV routing protocol and a recently presented state-of-the-art ad hoc routing protocol in the literature, congestion-adaptive ... challenging problems for seamless access to wireless networks In this paper, a novel link enhancement mechanism is proposed to deal with mobility management problem in vehicular ad hoc networks Two machine ... destination without any preconfigured infor-mation or regularly varying link situations The position-based routing becomes a suitable candidate for vehicular ad hoc networks (VANETs) because this kind

Ngày tải lên: 21/06/2014, 23:20

... Vehicular Ad Hoc Networks (VANET ’04), pp 29–37, Philadelphia, Pa, USA, October 2004. [15] F Picconi, N Ravi, M Gruteser, and L Iftode, “Probabilistic validation of aggregated data in vehicular ad-hoc ... vehicular ad hoc networks (VANETs) have drawn a lot of attention in recent years with their promising functions on car accident reduction, real-time traffic information support, and enhancement of comfortable ... these two functions in the reputation adap-tation mechanism, that is, the algorithm for repuadap-tation value accumulation and the degradation function D( ) for reputation decrease, can be flexibly

Ngày tải lên: 21/06/2014, 23:20

... (I-EPD) for real-time video streaming over a multihop wireless ad hoc network In a multihop wireless ad hoc network, the quality of transferring real-time video streams could be seriously degraded, ... promoted multimedia applications over wireless ad hoc networks Transferring real-time video streams over a wireless ad hoc network could suffer serious QoS degradation because stale video packets are ... intelligently on IN for improving the quality of video streams over multi-hop wireless ad hoc networks Previous works on improving the quality of video streaming over a wireless ad hoc network include

Ngày tải lên: 21/06/2014, 23:20

... drawbacks and benefits of adding certain function-alities to the network Finally, the main conclusions are pre-sented inSection 7 2 AD HOC PROTOCOLS FOR 4G SOLUTIONS Bringing ad hoc networks into a 4G ... update routes between end-points Because of the nature of ad hoc networks, rout-ing protocols should be highly dynamic and robust Ad hoc routing protocols are often classified regarding its method ... configuration in this type of networks Perkins [9] proposes a simple mechanism for au-toconfiguration where nodes simply choose a random ad-dress and perform a duplicate adad-dress detection based

Ngày tải lên: 22/06/2014, 19:20

... shown poor performance for large ad hoc networks without spatial multiplexing In this paper, we will show that spatial multiplexing provides large gains in throughput for small networks, and ... throughput of a lattice ad hoc network with infinitely narrow beamwidth Theorem 4 The uniform throughput T for an ad hoc network on a square lattice with g beams of zero width for each node satisfies ... Gerstacker We concentrate on an ad hoc network model with nodes on integer lattice points over a 2D plane We examine the limits of ad hoc network performance for systems with antenna arrays capable

Ngày tải lên: 22/06/2014, 19:20

... energy limitation has become a performance bottleneck for mobile ad hoc networks. IEEE 802.11 has been adopted as the current standard MAC protocol for ad hoc networks. However, it was developed ... cally adjusting power level for transmitting DATA/ACK according to the distances between the transmitter and its neighbors. In addition, the power level for transmitting RTS/CTS is also adjustable ... research on wireless networks has gained a great amount of attention. One of the most important research ar- eas is MANETs (mobile ad hoc networks, also called mobile multihop wireless networks) [1].

Ngày tải lên: 22/06/2014, 22:20

... type Source address O ff-Phase duration On-Phase duration super-time-slot duration for nodei super-time-slot starts defer time Source address forith super-time-slot Destination address forith super-time-slot ... transmis-sion time for each TRFR message comply with a uniform dis-tribution, and carrier sensing is done before sending Since hidden problem is accessible for our system, the performance will be ... removing accumulative clock-drifts and in-forming phase-switching schedules, an additional function for schedule broadcasts is to acquire more suitable values for essential parameters according to

Ngày tải lên: 22/06/2014, 22:20

... INTRODUCTION: AD HOC NETWORK BROADCASTING We introduce three new classes of broadcast protocols that use machine learning in different ways for mobile ad hoc networks A mobile ad hoc network (MANET) ... Hamid Sadjadpour Because adaptability greatly improves the performance of a broadcast protocol, we identify three ways in which machine learning can be applied to broadcasting in a mobile ad hoc ... Article Intelligent Broadcasting in Mobile Ad Hoc Networks: Three Classes of Adaptive Protocols Michael D Colagrosso Department of Mathematical and Computer Sciences, Colorado School of Mines,

Ngày tải lên: 22/06/2014, 22:20

... existing literature on mobility in MANETs In reality, fading links are the norm in wireless communication networks at the scales relevant for ad hoc networks [9] In such cases, link availability is ... January 2006; Revised 9 October 2006; Accepted 9 October 2006 Recommended by Hamid Sadjadpour Mobile ad hoc networks (MANETs) have inherently dynamic topologies Under these difficult circumstances, ... An Analysis Framework for Mobility Metrics in Mobile Ad Hoc Networks Sanlin Xu, Kim L Blackmore, and Haley M Jones Department of Engineering, Faculty of Engineering and Information Technology,

Ngày tải lên: 22/06/2014, 22:20

... not feasible in large ad hoc networks where flooding could be harmful for the performances of the network [4] Therefore a trade off has to be found where nodes send some advertisements in specific ... introduces the reader to an overview of the resource discovery protocols for ad hoc networks The principles of the grid based discovery protocols are explained and the need for an efficient empty ... 1.1 The need for efficient resource discovery protocols in wireless ad hoc networks 1.2 The empty cell problem for grid based resource discovery protocols 1.3...

Ngày tải lên: 05/10/2015, 21:22

... MAC protocols in ad hoc networks Research efforts in the field of access mechanisms for single-channel ad hoc networks have been extensive For example, a multiplicity of single-channel MAC protocols ... of Service Provisioning in Ad hoc Wireless Networks: A Survey of Issues and Solutions Ad Hoc Networks 4, 83–124 (2006) L Kleinrock, F Tobagi, Packet Switching in Radio Channels: Part I-Carrier ... Cooperative Asynchronous Multi-Channel MAC Protocol for Ad Hoc Networks, in 3rd International Conference on Broadband Communications, Networks and Systems, BROADNETS ‘06, 1–10 (2006) S Nethi, J Nieminen,...

Ngày tải lên: 20/06/2014, 22:20

... the ad hoc transport Protocol (ATP) for mobile ad hoc networks [6] After studying issues with the TCP in ad hoc networks, the authors have taken a new approach using ATP to improve the performance ... comparison of TCP performance over three routing protocols for mobile ad hoc networks, ” in Proceedings of the 2nd International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc ’01), pp 56–66, ... involved in using the TCP in a multipath ad hoc network environment TCP PERFORMANCE IN MULTIPATH AD HOC NETWORKS The TCP was originally designed for wired networks where the packet drop is generally...

Ngày tải lên: 22/06/2014, 22:20

... affecting the performance of ad hoc networks Taxonomy for performance evaluation of ad hoc networks is presented in Figure 2.1 In the taxonomy, we classify general ad hoc networks into two categories, ... Hybrid Ad Hoc Networks Protocols Performance Delay-Sensitive Services Conventional Protocols MAC Protocls Protocols Supporting QoS Routing Protocls Power Control Figure 2.1： The taxonomy for performance ... channel for transmitting packets The MAC protocol is an important factor that affects the performance of an ad hoc network Since the emergence of ad hoc networks, a lot of MAC protocols have been adopted...

Ngày tải lên: 02/10/2015, 12:56

... acquire in mobile ad hoc networks There are many proposed protocol for multicast routing in mobile ad hoc networks, such as PUMA, ODMRP or MAODV In those protocols, PUMA (Protocol for unified multicasting ... environment The motivation for this work comes from the challenges of mobile ad hoc networks to support reliable and efficient communication for distributed computing Mobile Ad Hoc networks present another ... FOR MULTICAST ROUTING IN MOBILE AD HOC NETWORKS GRADUATION THESIS Faculty of Information Technology Supervisor: Dr Dai Tho Nguyen HA NOI - 2010 -2- ABSTRACT There are many multicast routing protocols...

Ngày tải lên: 23/11/2012, 15:03

... Feigenbaum for many valuable suggestions Message success rate 0.8 R EFERENCES 0.6 [1] C Perkins, Ad Hoc Networking Addison-Wesley, 2000 [2] C.-K Toh, Ad Hoc Mobile Wireless Networks: Protocols ... http://gunpowder.stanford.edu/˜laik/projects/adhoc/mitigating.pdf [5] L Buttyan and J P Hubaux, “Enforcing service availability in mobile ad- hoc WANs,” in IEEE/ACM Workshop on Mobile Ad Hoc Networking and Computing (MobiHOC), Boston, ... “Stimulating cooperation in self-organizing mobile ad hoc networks, ” ACM Journal for Mobile Networks (MONET), special issue on Mobile Ad Hoc Networks, summer 2002 [Online] Available: http://lcawww.epfl.ch/Publications/Buttyan/TR01“˙046.ps...

Ngày tải lên: 15/03/2014, 04:20

... SECURITY FOR WIRELESS AD HOC NETWORKS Farooq Anjum and Petros Mouchtaris SECURITY FOR WIRELESS AD HOC NETWORKS SECURITY FOR WIRELESS AD HOC NETWORKS Farooq Anjum and Petros ... take in order to reach their destinations Networks that support the ad hoc architecture are typically called wireless ad hoc networks or mobile ad hoc networks (MANET) We will use these two terms ... these networks The increased vulnerabilities of ad hoc networks and the limitations of existing security solutions designed for wireline networks will become clearer throughout the book Ad hoc networks...

Ngày tải lên: 25/03/2014, 12:07

... focal aspects in ad hoc networks The first chapter is a forerunner for things to come It primarily motivates the need for ad hoc networks and xxii discusses the evolution of these networks and projects ... AD HOC NETWORKS Technologies and Protocols This page intentionally left blank AD HOC NETWORKS Technologies and Protocols Edited by PRASANT MOHAPATRA University of California‚ Davis ... characteristics of ad hoc networks in more detail 1.1.2 Ad hoc Networks Characteristics Mobility: the fact that nodes can be rapidly repositioned and/or move is the raison d’etre of ad hoc networks Rapid...

Ngày tải lên: 01/06/2014, 00:31

... cognitive radio ad hoc networks Ad Hoc Netw Elsevier 7(5), 810–836 (2009) doi:10.1016/j adhoc.2009.01.001 HB Salameh, M Krunz, Channel access protocols for multihop opportunistic networks: challenges ... Radio An Integrated Agent Architecture for Software Defined Radio Ph.D dissertation (KTH Royal Institute of Technology, 2000) IF Akyildiz, W-Y Lee, KR Chowdhury, Crahns: cognitive radio ad hoc ... secondary users is a major challenge in distributed multiuser cognitive radio networks If legacy MAC protocols designed for traditional networks were to be used in CRNs, all of the secondary users that...

Ngày tải lên: 20/06/2014, 21:20