Topology Control in Wireless Ad Hoc Networks phần 5 ppsx

... simulating mobile ad hoc networks 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica Mobile networks Mobility: 1/10  Which is the impact of mobility on TC? – Increased ... value Optimal value of k for increasing values of n (from [Blough et al. 03]) Remark: setting k = 9 guarantees connectivity w.h.p. for values of n ranging from 50 to 50 0 5 th ACM...

Ngày tải lên: 14/08/2014, 14:20

... simulation 0,07 651 000 0,0894 750 0,108 250 0 0, 153 3 250 0,2 353 100 0,2720 75 0,3 258 50 0,44 152 5 0, 656 610 CTRn Table 1. (from [SantiBlough03]) Values of the CTR when n nodes are distributed uniformly in R = [0,1] 2 . ... power the minimum level such that the corresponding routing table contains all the nodes in the network  Setting the power to this minimum level achieves the...

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... 2004 Istituto di Informatica e Telem atica Topology control: an informal definition Topology control: the art of coordinating nodes’ decisions regarding their transmitting ranges, in order to generate ... network capacity Introduction: 1/7 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica Topology Control in Wireless Ad Hoc Networks Paolo S...

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... 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 ... n points in a d-dimensional region R, denoting the node positions. Determine a connecting range assignment RA of minimum energy cost, i.e. such that ∑ u (RA(u)) α is minimum 5 th ACM...

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... periodical topology control 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica RNG, GG, and other routing graphs (2) Energy-efficient communication: 5/ 7  Other routing graphs ... = π/3 p u, ρ u 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica Topology control protocols TC protocols: 1/12  Previous Section: emphasis on fin...

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... properties) using these distributions 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica More realistic network models Open issues: 2/11  Ad hoc network model used in this ... MST-based TC 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica Impact of interferences Open issues: 4/11  Another possibility for more realistic models...

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

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... on-line at the following URL: http://www.imc.pi.cnr.it/~santi  A survey paper on TC: P. Santi, Topology Control in Wireless Ad Hoc and Sensor Networks , Tech. Rep. IIT-TR-04/2003, Istituto di Informatica ... described in the previous slide can lead to packets getting into infinite loops! 1mW 10mW S D n 10 n 1 10mW 5 th ACM MobiHoc – Tokyo, May 24, 2004 Istituto di Informatic...

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... xxvii I Introduction 1 1 Ad Hoc and Sensor Networks 3 1.1 TheFutureofWirelessCommunication 3 1.1.1 Adhocnetworks 3 1.1.2 Wirelesssensornetworks 5 1.2 Challenges 7 1.2.1 Adhocnetworks 8 1.2.2 Wirelesssensornetworks ... reducing multihop interference . 192 15. 3 Usingmorerealisticenergymodels 1 95 15. 4 Power spanning factor and network lifetime . . . . . . . . . . . . . . . . 197 15...

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... has Topology Control in Wireless Ad Hoc and Sensor Networks P. Santi  20 05 John Wiley & Sons, Ltd AD HOC AND SENSOR NETWORKS 7 Table 1.1 Comparison of typical features of wireless ad hoc ... Figure 2.1). 2 Modeling Ad Hoc Networks In this chapter, we introduce a simple but widely accepted model of ad hoc network. Since sensor networks are a subc...

Ngày tải lên: 14/08/2014, 14:20