security in wireless ad hoc networks

... the topic of security for wireless ad hoc networks The topic of security in wireless ad hoc networks itself is... destinations Networks that support the ad hoc architecture ... be using any of the addresses chosen by an incoming host, thus denying the incoming host the right to join the network Constraints existing in ad hoc networks also add to the vulnerabilities ... magazines SECURITY FOR WIRELESS AD HOC NETWORKS Farooq Anjum and Petros Mouchtaris SECURITY FOR WIRELESS AD HOC NETWORKS [...]... of wireless nirvana Technology under development for wireless

Ngày tải lên: 25/03/2014, 12:07

... Fundamentally, wireless networks can be divided into two types: infra- structure, and ad hoc networks (also called infrastruc- ture less networks). Examples of infrastructure and wireless ad hoc networks ... proposals for improving the performance of TCP on wireless ad hoc networks, those readers who are interested in single-hop wireless networks are referred to [17]. The readers inter- ested in the surveys ... TCP in wireless ad hoc networks TCP was designed for wired networks without consider- ing the complexity of wireless networks. With the advent of wireless technology TCP was also employed in wireless

Ngày tải lên: 21/06/2014, 00:20

... have discussed the potential advantages of using TC techniques in wireless ad hoc and sensor networks: reducing node energy consumption and reducing radio interference between nodes ... builds and maintains routing table RT i ) 2. Building the master routing table repeat until termination for each node v in RT max find the minimum i such that v is in RT i set the master routing table ... tocol. As in COMPOW, every node in the network maintains separate routing tables, one for each power level. Routing table RT i , referring to power level P i , is maintained by exchanging hello

Ngày tải lên: 14/08/2014, 14:20

... broadcasting in wireless ad hoc networks IEEE Transactions on Parallel and Distributed Systems 15(12), 105 7– 106 9 Liang W 2002 Constructing minimum-energy broadcast trees in wireless ... wireless ad hoc networks. .. Communications and Multimedia, Washington, DC Moaveni-Nejad K and Li X 2005 Low-interference topology control for wireless ad hoc networks Ad Hoc ... Choi Y 2001 On supporting link asymmetry in. .. Morin P, Stojmenovic I and Urrutia J 2001 Routing with guaranteed delivery in ad hoc wireless networks Wireless Networks 7(6), 609–616

Ngày tải lên: 14/08/2014, 14:20

... fewer chances to win the contention) 1.4 Fairness Issues in Multihop Wireless Ad Hoc Networks As in wireline networks, fairness in multihop wireless ad hoc networks can also beinvestigated at two ... Multihop wireless ad hoc network Figure 1.4: MAC/Link layer fairness in cellular network/wireless LAN, single-hop less ad hoc network and multihop wireless ad hoc network wire-Several fair scheduling ... multihop wireless adhoc networks In this thesis, we investigate the fairness problem in multihop wireless ad hoc networks We look into the fairness problem at two levels: the MAC/link layerand the

Ngày tải lên: 12/09/2015, 11:35

... …… MessageInfoHeader infoArray[MAX_INFO_FIELDS]; int packetSize; char *packet; NodeAddress originatingNodeId; int sequenceNumber; int originatingProtocol; int numberOfHeaders; int headerProtocols[MAX_HEADERS]; ... to be a promising technique in current wireless packet switched networks. In order to bring the benefit of network coding to the wireless mobile ad-hoc networks we have designed an intelligent ... may result in additional challenging issues to be addressed. Finally, another interesting area for consideration would be information security. In our intelligent opportunistic network coding scheme,

Ngày tải lên: 16/10/2015, 11:59

... UNIVERSITYUNIVERSITY OF TECHNOLOGY AND ENGINEERINGBinh Minh NguyenEFFICIENT CORE SELECTION FOR MULTICASTROUTING IN MOBILE AD HOC NETWORKS GRADUATION THESISFaculty of Information TechnologyHA NOI - 2010Trang ... UNIVERSITYUNIVERSITY OF TECHNOLOGY AND ENGINEERINGBinh Minh NguyenEFFICIENT CORE SELECTION FOR MULTICASTROUTING IN MOBILE AD HOC NETWORKS GRADUATION THESISFaculty of Information TechnologySupervisor: ... participating, the networktopology, link state, Which are not available or too expensive to acquire in mobile adhoc networks There are many proposed protocol for multicast routing in mobile ad hocnetworks,

Ngày tải lên: 23/11/2012, 15:03

... Yingsong Huang, Philip A Walsh, Shiwen Mao and Yihan Li Section 2 Routing Protocols for Wireless Ad-Hoc Networks 53 Chapter 3 Graph-Based Routing, Broadcasting and Organizing Algorithms for Ad-Hoc ... Yuan Chapter 5 Reducing Routing Loops Under Link-State Routing in Wireless Mesh Networks 101 Takuya Yoshihiro and Masanori Kobayashi Section 3 Applications of Wireless Ad-Hoc Networks 121 Chapter ... configuration or maintenance There are an array of applications of wireless ad-hoc networks in the place where there is noinfrastructure or the infrastructure is knocked out, and a wireless ad-hoc network

Ngày tải lên: 14/03/2014, 21:20

... clustering All clustering algorithms incur some additional signaling overhead to Page-20 form and maintain their cluster structures The clustering overhead consists of: HELLO packets overhead, ... to the existing techniques. Keywords: Vehicular networks; V2V; clustering schemes in VANET; CH election. Page-1 1. Introduction Recent advances in wireless networks have led to the introduction ... cluster-head. The authors proposed that a clustering decision is made periodically every clustering interval (CI) period, and a clustering maintenance is performed in between CI. However, having cluster

Ngày tải lên: 20/06/2014, 20:20

... wideband sensing given the inherent inaccuracy of spectrum sensing Coordinated Sender-Receiver SensingIn ad hoc envir-onments in which nodes are exposed to different parts of the network, the interference ... probabilityp D∗ min= 1− Pr[Dmin< D (i)∗ min] Substituting in (14), we get D (i)∗  − ln(p D∗ min) πα i ρ i (15) Note that,p D∗ mindetermines how muchD (i)minis close to D (i)∗min Give that Pr[outage|D ... cognitive ad hoc networks that optimizes the constrained cognitive user goodput while taking the unavoidable inaccuracy of spectrum sensing into account The proposed framework (i) randomly explores individual

Ngày tải lên: 20/06/2014, 21:20

... Cheng, J Sun, M Min, and D.-Z Du, “Energy-efficient broadcast and multicast routing in ad hoc wireless networks, ” in Proceedings of the 22nd IEEE International Performance, Computing and Communications ... by the shaded sector in Figure 5(a) There is no any other link included in the tree in the following grow operation Step In the second iteration, the link (4, 1) is found and added into the tree ... Gupta, “On maximizing lifetime of multicast trees in wireless ad hoc networks, ” in Proceedings of the International Conference on Parallel Processing (ICPP ’03), pp 333–340, Taiwan, China, October...

Ngày tải lên: 22/06/2014, 22:20

... 5th ACM MobiHoc – Tokyo, May 24, 2004 Tutorial outline  Introduction – – –  Stationary networks – – –  Motivation: the need for Topology Control (TC) in ad hoc networks An ad hoc network model ... Istituto di Inform atica e Telem atica 5th ACM MobiHoc – Tokyo, May 24, 2004 Motivations for topology control  Both energy and capacity are limited resources in ad hoc networks  In case of Wireless ... Control (TC) — maintain a topology with certain properties (e.g., connectivity) while reducing energy consumption and/or increasing network capacity Istituto di Inform atica e Telem atica Introduction:...

Ngày tải lên: 14/08/2014, 14:20

... maintain a routing table for each power level, and set as the common transmit power the minimum level such that the corresponding routing table contains all the nodes in the network  Setting ... dense networks  However, similar results have been proved also for the case of sparse networks In this case, R=[0,l ]2, and connectivity is investigated for l → ∞  In case of sparse networks, ... di Inform atica e Telem atica the CTR: 3/12 5th ACM MobiHoc – Tokyo, May 24, 2004 CTR: probabilistic approaches  In many realistic scenarios, node positions are not known in advance (for instance,...

Ngày tải lên: 14/08/2014, 14:20

... the minimum-power path in G’ and in G  In words, the power stretch factor is a measure of the increase in the energy cost due to the fact that we communicate using the routing graph G’ instead ... routing messages between nodes in an energy-efficient way  Why use the routing graph G’ instead of G? – Because G’ is sparse, thus the task of finding routes between nodes is much easier than in ... unidirectional links may occur  The RA problem: Consider a set of n points in a d-dimensional region R, denoting the node positions Determine a connecting range assignment RA of minimum energy...

Ngày tải lên: 14/08/2014, 14:20

... transmitting a message along an energy-efficient path in G’)  Other research focused on trying to adjust the maximum nodes’ transmitting range, in such a way that the communication graph remains ... information), the more energy savings can be achieved  However, information quality (and, thus, the energy savings) must be carefully traded off with the cost incurred for making the information available ... unicast, the concept of broadcast stretch factor of a subgraph G’ of G can be defined  Also in this case, the goal is to find sparse broadcast spanners that can be computed in a distributed and localized...

Ngày tải lên: 14/08/2014, 14:20

... mobility model in the ad hoc networks community Every node chooses uniformly at random a destination in [0,1]2, and moves towards it along a straight line with velocity chosen at random in [vmin,vmax] ... (similar to KNeigh): – – – at the beginning, every node orders its neighbors (set of nodes in the maximum transmitting range) according to some criterion (e.g., link quality) then, every node transmits ... Istituto di Inform atica e Telem atica TC protocols: 12/12 5th ACM MobiHoc – Tokyo, May 24, 2004 Mobile networks  Which is the impact of mobility on TC? – Increased message overhead: contrary...

Ngày tải lên: 14/08/2014, 14:20

... Open issue Istituto di Inform atica e Telem atica Mobility: 10/10 5th ACM MobiHoc – Tokyo, May 24, 2004 Open issues  Considerable body of research devoted to TC in ad hoc networks, but several ... idealized model of a real wireless network  Main limitation of this model: assumption that the radio coverage area is a perfect circle  In realistic scenarios: radio coverage area influenced by many ... influenced by many factors (obstacles, buildings, existing infrastructure, weather conditions, etc.), and it is hardly regular  Including too many details in the network model would make it extremely...

Ngày tải lên: 14/08/2014, 14:20

... Preliminary step in this direction: the determination of the information exchange period for the LMST protocol [Li et al.03b] Istituto di Inform atica e Telem atica Open issues: 7/11 5th ACM MobiHoc ... Istituto di Inform atica e Telem atica Open issues: 8/11 5th ACM MobiHoc – Tokyo, May 24, 2004 TC in the protocol stack  Where should TC be positioned in the protocol stack?  No clear answer in the ... Our view: Routing Layer TC Layer MAC Layer Istituto di Inform atica e Telem atica Open issues: 9/11 5th ACM MobiHoc – Tokyo, May 24, 2004 TC and Routing One possible view: Routing Protocol Trigger...

Ngày tải lên: 14/08/2014, 14:20

... 7/16 5th ACM MobiHoc – Tokyo, May 24, 2004 Infinite loop  If not implemented carefully, the optimization described in the previous slide can lead to packets getting into infinite loops! n1 S ... found in which CLUSTERPOW is more efficient than NTCPL, or in which the contrary holds  Intuitively, NTC-PL is more efficient in the uplink (from u to n1), while CLUSTERPOW is more efficient in ... “Topology Control in Wireless Ad Hoc and Sensor Networks , Tech Rep IIT-TR-04/2003, Istituto di Informatica e Telematica, Pisa Italy, March 2003 Available upon request Istituto di Inform atica e Telem...

Ngày tải lên: 14/08/2014, 14:20