Topology Control in Wireless Ad Hoc Networks phần 8 ppt

... 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 ... MobiHoc – Tokyo, May 24, 2004 Istituto di Informatica e Telem atica Infinite loop Level-based TC: 8/ 16  If not implemented carefully, the optimization described in the p...

Ngày tải lên: 14/08/2014, 14:20

... 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 ... sleep:idle:rx:tx min :tx max ratio is – 0.056 : 1 : 1 : 1.044: 1.4 18 in a CISCO Aironet 80 2.11 wireless card – 0.440 : 1 : 1.006 :0 .87 2 : 1.114 in a Medusa II sensor...

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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 San...

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... 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 three goals of: – maximizing network ... CTR: 10/12  In [Narayanaswamy et al.02], the authors introduce COMPOW, a protocol that attempts to determine the CTR for connectivity in a distributed way  Nodes maintain a routing table...

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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 ... 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 MobiHoc – Tokyo, May 24, 2004 Istituto di...

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... (reverse of the broadcast problem) – Drawbacks: non localized; GPS required  RamanathanRosales-Hain00: – Goal: minimize the maximum of nodes transmitting ranges while maintaining connectivity – ... in G’)  Other research focused on trying to adjust the maximum nodes’ transmitting range, in such a way that the communication graph remains connected. the topology of the communication gra...

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... 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 ... (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...

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... 2004 Istituto di Informatica e Telem atica Open issues Open issues: 1/11  Considerable body of research devoted to TC in ad hoc networks, but several aspects have not been carefully investigated ... 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 mod...

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... 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 ... . . . . . . . . 85 8 Energy-efficient Communication Topologies 87 8. 1 Energy-efficientUnicast 87 8. 2 Energy-efficientBroadcast 92 Topology Control in Wireless Ad...

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... 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