overview of ad hoc routing protocols ppt

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/06/2014, 22:20

... achieved. 10.4 Routing in Wireless Ad Hoc Networks A brief introduction to packet routing in wireless ad hoc networks was made in Chapter 2. There, it was highlighted that the performance of such protocols ... Source Routing Protocols for Mobile Ad Hoc Networks, IETF Draft, October, 1999. [18] Toh C. K. A Novel Distributed Routing Protocol to Support Ad Hoc Mobile Computing, in Proceedings of IPCCC ... assumption of a static topology is made. Thus, new routing protocols are needed for the dynamically changing ad hoc wireless environment. This section describes some representative routing protocols...

Ngày tải lên: 29/09/2013, 21:20

... than CMOS • Need high current drive; should be able to drive capacitances of interconnects of any length ã High level of integration (>10 10 transistors/circuit) ã High reproducibility (better ... Heat shock protein (HSP 60) in organisms living at high temperatures (extremophiles) is of interest in astrobiology ã HSP 60 can be purified from cells as a double-ring structure consisting of ... of external magnetic field, application of mechanical deformation ã Very high current carrying capacity ã Excellent field emitter; high aspect ratio and small tip radius of curvature are ideal for field...

Ngày tải lên: 21/02/2014, 17:20

... Branch Office Firewall Use ISA Server to:  Create an IPSec tunnel-mode VPN between offices  Create a PPTP or L2TP with IPSec VPN between offices  Inspect and filter all traffic between offices  Provide ... access to the Internet at the branch office Corporate Headquarters Corporate Headquarters Server Internet LAN ISA Server VPN Tunnel Branch Office Branch Office ... filtering Ease of Use Ease of Use Efficient management tools Network templates Product integration Ease of use for clients Efficient management tools Network templates Product integration Ease of use...

Ngày tải lên: 27/02/2014, 05:20

... referred to as mobile ad hoc networks (MANETs) [33] or as infrastructure-less wireless networks. 1.2 Mobile Ad Hoc Networks A Mobile Ad hoc NETwork (MANET) is a system of wireless mobile ... and Local Ad Hoc Wireless Networks M arco Conti 2 M ulticasting Techniques in Mobile Ad Hoc Networks X iao Chen and Jie Wu 3 Qualit y of Service in Mobile Ad Hoc Networks ... of them is eliminated by optimizing over the secondary metric (say delay), and so on. The mobility of mobile ad hoc networks adds another dimension of difficulty. Highly mobile hosts in the ad...

Ngày tải lên: 03/06/2014, 01:08

... effective transport capacity of ad hoc dispersed spectrum cognitive radio networks is derived, and the effects of 3D node distribution on the effective transport capacity of ad hoc dispersed spectrum ... M- QAM) schemes. We then consider the deployment of such cognitive radio systems in an ad hoc fashion. We consider an ad hoc dispersed spectrum cognitive radio network, where the nodes are assumed to ... ticle Performance Analysis of Ad Hoc Dispersed Spectrum Cognitive Radio Networks over Fading Channels Khalid A. Qaraqe, 1 Hasari Celebi, 1 Muneer Mohammad, 2 and Sabit Ekin 2 1 Department of Electrical and...

Ngày tải lên: 21/06/2014, 05:20

... V i . Because of the random choice of the routes’ directions the ex- pected value of V i will be equal to half of the expected value of the number of nodes in the vertical strip formed by the “ column” of ... model to take into account the effects of fading and shadowing by introducing random direction depen- dent interference regions (in terminology of [20]) instead of circular in- terference regions ... obtain the main result of this paper: the scaling of the RDP limited throughput of a random ad hoc network. The next theorem covers the case where the RDP plays the role of the throughput bottleneck. Theorem...

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 04/07/2014, 06:20

Ngày tải lên: 07/07/2014, 00:20

... 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 has ... 2011:108 http://jwcn.eurasipjournals.com/content/2011/1/108 Page 3 of 15 2. T Bheemarjuna Reddy, I Karthigeyan, BS Manoj, C Siva Ram Murthy, Quality of Service Provisioning in Ad hoc Wireless Networks: A Survey of Issues and Solutions. Ad Hoc Networks. ... end of an ATIM window, it has to wait for the next data interval and an additional delay of T c is added. Hence, the overall delay is D = D 0 + M · T c , (15) where M denotes the number of additional...

Ngày tải lên: 20/06/2014, 22:20

Ngày tải lên: 22/06/2014, 22:20

... represent states of affairs and those which do not. The number of termination points of a chooser often exceeds the number of choices available. Table 1 shows the English forms of the Questions ... Structure. Ph.O. thesis, University of Pennsylvania. 1982. [Winograd 72] Winograd. T Understanding Natural Language. Academic Press, Edinburgh. 1972. 84 AN OVERVIEW OF THE NIGEL TEXT GENERATION ... project can be regarded as a single experiment, a test of the functionalism of the systemic framework, and of its identification of the functions of English. In artificial intelligence, there is...

Ngày tải lên: 31/03/2014, 17:20

... of 12 (page number not for citation purposes) Journal of Neuroinflammation Open Access Research Expression profiles for macrophage alternative activation genes in AD and in mouse models of AD Carol ... from AD patients show increased gene expression of alternative activation markers To translate the data derived from cell culture and mouse models of AD, we measured expression levels of genes associated ... effects of the Th1-inducing adjuvant, IL-12, in a Th2 model of granuloma- tous disease. Am J Pathol 2000, 157:945-955. 55. Davila H, Magee T, Vernet D, Rajifer J, Gonzalez-Cadavid N: Gene transfer of...

Ngày tải lên: 19/06/2014, 22:20

... AODV: ad hoc on-demand distance vector; ATCP: ad hoc TCP; ADV: adaptive distance vector; APS: adaptive packet size; APS-FeW: adaptive packet size on top of FeW; ABR: associativity-based routing protocol; ... in ad hoc wireless, networks. Ad hoc Netw. 4, 687–708 (2006). doi:10.1016/j.adhoc.2005.08.001 37. E Hamadani, V Rakocevic, A cross layer solution to address TCP, intra-flow performance degradation ... readers inter- ested in the surveys of TCP enhancement in wireless networks can refer to [18] where six of the surveyed proposals are related to ad hoc networks, and five of these six had already...

Ngày tải lên: 21/06/2014, 00:20

... root s 2 s 4 a 11 Administrative shutdown of the service Pr=0 SrvSt=“off” SzBuf =1 s 5 a 5 Log off Pr=2 SrvSt=“off” SzBuf =0 a 6 Restart the service Pr=2 SrvSt=“off” SzBuf =0 Pr=0 SrvSt=“off” SzBuf ... probability of occurrence of the whole attack scenario, starting from the probabilities of elementary actions in t he graphs of attacks, would be used. To enhance the accuracy of the obtained values, additional parameters ... the coverage of each other. Some of the observer nodes, for example, go out of the coverage of the user nodes (which partici- pated in routing the attack traffic) during some period of the attack...

Ngày tải lên: 21/06/2014, 02:20

... capacity improve- ment of ad hoc wireless networks using directional antennas,” in Proceedings of the 4th ACM International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc ’03),pp. 108–116, ... anonymous on demand routing with untraceable routes for mobile ad- hoc networks,” in Proceedings of the 4th ACM International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc ’03),pp. 291–302, ... for directional antennas in mobile ad hoc networks,” in Proceedings of the 3rd ACM International Symposium on Mobile Ad Hoc Networking & Computing (MobiHoc ’02), pp. 183–193, Lausanne, Switzerland,...

Ngày tải lên: 21/06/2014, 20:20

... in mobile ad hoc networks,” in The Handbook of Ad Hoc Wireless Networks,pp. 25–40, 2003. [50] L. Junhai, X. Liu, and Y. Danxia, “Research on multicast routing protocols for mobile ad- hoc networks,” ... for ad hoc networks,” Ad Hoc Netw ork s, vol. 4, no. 6, pp. 724–748, 2006. [45] C. S. R. Murthy and B. S. Manoj, Ad Hoc Wirel ess Netw ork s: Architectures and Protocols, Prentice-Hall, Upper Saddle ... possible, but this introduces additional overhead. Overlay multicasting can improve routing efficiency by exploiting the broadcast nature of ad hoc networks. For instance, a one broadcast packet can be...

Ngày tải lên: 21/06/2014, 22:20

... networks using 802.11 (WI-FI) are examples of this. Ad hoc networks are another type of wireless networks. They are formed by a collection of nodes without the aid of any fixed infrastructure. Since there ... fashion. The problem of throughput capacity of ad hoc wire- less networks has received a lot of attention starting with the article [1] in which it was shown that the throughput of random networks ... increase of the through- put with node density due to the increase of received power to noise ratio. The second effect is the decrease of the throughput due to the increase of the number of relays...

Ngày tải lên: 22/06/2014, 00:20