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Maltz David B Johnson YihChun Hu Jorjeta Jetcheva Computer Science Department Carnegie Mellon University Pittsburgh PA 15213 httpwwwmonarchcscmuedu Abstract An ad hoc network is a collection of wireless mobile nodes dynamically forming a temporary n. g shooter detection Goals of clock synchronization Compensate offset between clocks Compensate drift between clocks terms are explained on following slides Time Synchronization Sensing Localization Duty Cycling TDMA Ad Hoc and Sensor Networks Roger W com ABSTRA CT Multihop infrastructure wireless mesh netw orks of fer increased re liability co erage and reduced equipment costs er their single hop counterpart wireless LANs Equipping wireless routers with multiple radios further impro es the capaci Ad-hoc . On-Demand Distance Vector . Routing. &. DSR. : The Dynamic Source Routing . Protocol for. . Multi-Hop . Wireless Ad Hoc Networks. November 2011,. Giorgos . Papadakis. & Manolis. Dublin Ad-Hoc Wireless Network (DAWN) [5] infrastructure (DAWN is a Trinity College wireless network test-bed). The PDA software only communicates with others when specific conditions are met i.e., w Abstract. Ad hoc low-power wireless networks are an exciting research direction in sensing and pervasive computing. .. . Prior security work in this area has focused primarily on denial of communication at the routing or medium access control levels. . Multihop. . LEACH. Energy LEACH. 1. Abstract. E. nergy-LEACH . and . multihop –LEACH protocols. . . Energy-LEACH . protocol improves . the . choice . method of the cluster head, . makes . some . nodes which . Media Applications. on Different Cloud based Host Servers. Group 11. Arun. . Shivaramakrishna. (#69127904). Prateek. . Ramachandra. (#28321312) . . Alok. . Boopalam. . Anantha. Krishna(#91527264). Jung. Il . Choi. , . Mayank. . Jain. , . Kannan. . Srinivasan. , . Philip Levis, . Sachin. . Katti. . Stanford . University. . Mobicom. 10’. Wireless Channel . –. Half Duplex?. “It is generally not possible for radios to receive and transmit on the same frequency band because of the interference that results. 11/14/12. http://. www.youtube.com/watch?v=B7yayA6mJe8. Overview. Wireless networks are used almost . everywhere:. . At . home, in industry, . for entertainment….. Anywhere there is communication required, WLAN’s are . EE 122: Intro to Communication Networks. . Materials with thanks to . Scott Shenker, . Jennifer Rexford, Ion Stoica, Vern Paxson. and other colleagues at Princeton and UC Berkeley. 2. 3. Metrics for evaluation / comparison of wireless technologies. Broch. et al. Presented by Brian Card. 1. Outline. Introduction. NS enhancements. Protocols:. DSDV. TORA. DRS. AODV. Evaluation. Conclusions. 2. 3. Node1. Node2. Node3. Node4. Introduction. 4. Node1. A Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing Protocols MOBICOM 1998 Dallas, Texas Josh Broch , David Maltz , David Johnson, Yih -Chun Hu and Jorjeta Jetcheva Computer .. Wireless is Global. The standard radio frequencies run in the range of 3Hz to 300 GHz. There is other frequencies used for example the 222 MHz through 225 MHz is for amateur radio. If your interested in what frequencies your country is using for what? Take a look at the frequencies. Jung. Il . Choi. , . Mayank. . Jain. , . Kannan. . Srinivasan. , . Philip Levis, . Sachin. . Katti. . Stanford . University. . Mobicom. 10’. Wireless Channel . –. Half Duplex?. “It is generally not possible for radios to receive and transmit on the same frequency band because of the interference that results.