Topology Control in Wireless Ad Hoc Networks phần 4 pot

... than in the case of unicast 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica Physical vs. logical node degree TC protocols: 4/ 12  Major advantage of topology control: ... periodical topology control 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica RNG, GG, and other routing graphs (2) Energy-efficient communication: 5/7...

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 ... 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 MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica...

Ngày tải lên: 14/08/2014, 14:20

... TC 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica Impact of interferences Open issues: 4/ 11  Another possibility for more realistic models is considering interferences between ... needed 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica The mobile CTR (4) Mobility: 7/10 CTR in case of stationary and RWP mobile networks (fr...

Ngày tải lên: 14/08/2014, 14:20

... network capacity Introduction: 1/7 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica Topology Control in Wireless Ad Hoc Networks Paolo Santi Istituto di Informatica e ... 20 04 Istituto di Informatica e Telem atica Topology control: an informal definition Topology control: the art of coordinating nodes’ decisions regarding their transmittin...

Ngày tải lên: 14/08/2014, 14:20

... 24, 20 04 Istituto di Informatica e Telem atica CTR: probabilistic approaches the CTR: 4/ 12  In many realistic scenarios, node positions are not known in advance (for instance, sensors spread ... data [SantiBlough03]: – reducing the transmitting range of about 40 % with respect to CTR yields a graph in which 90% of the nodes are connected 5 th ACM MobiHoc – Tokyo, May 24, 20 04 I...

Ngày tải lên: 14/08/2014, 14:20

... simulating mobile ad hoc networks 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica Mobile networks Mobility: 1/10  Which is the impact of mobility on TC? – Increased ... w.h.p. 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica The mobile CTR Mobility: 4/ 10  With homogeneous topology control, message overhead is not an...

Ngày tải lên: 14/08/2014, 14:20

... sleep:idle:rx:tx min :tx max ratio is – 0.056 : 1 : 1 : 1. 044 : 1 .41 8 in a CISCO Aironet 802.11 wireless card – 0 .44 0 : 1 : 1.006 :0.872 : 1.1 14 in a Medusa II sensor node  Open issue: how do these ... 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...

Ngày tải lên: 14/08/2014, 14:20

... 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 ... packets getting into infinite loops! 1mW 10mW S D n 10 n 1 10mW 5 th ACM MobiHoc – Tokyo, May 24, 20 04 Istituto di Informatica e Telem atica CLUSTERPOW vs. NTC-PL Level-...

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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 ... Connectivity: Stationary Networks 39 4. 1 TheCTRinDenseNetworks 42 4. 2 TheCTRinSparseNetworks 46 4. 3 The CTR with Different Deployment Region and Node Distributio...

Ngày tải lên: 14/08/2014, 14:20

... 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 subclass of ad hoc networks, this model ... has Topology Control in Wireless Ad Hoc and Sensor Networks P. Santi  2005 John Wiley & Sons, Ltd AD HOC AND SENSOR NETWORKS 7 Table 1.1 Comparison of typ...

Ngày tải lên: 14/08/2014, 14:20