Improving In-Network Aggregation for Wireless Sensor Networks

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Improving In-Network Aggregation by Exploiting the Broadcast Nature of Wireless Sensor Networks By: Anwar 09671A0441 ECE(IV/IV) JBIET(Autonomous)


Inception In-Network Aggregation is a mechanism for reducing the overall amount of power and bandwidth required to process the user’s query by allowing sensor readings to be combined (aggregated) by intermediate nodes. A wireless sensor network (WSN) is a network of thousands of resource-constrained sensors whose communications with a central station are conveyed by means of wireless signals


Contents: Introduction to WSNs. Motivation. Advantages & Disadvantages of WSNs. What is In-Network Aggregation ? Why In-Network Aggregation as a solution? Achievements of INA . Conclusion. References.


1.Introduction A sensor node is generally comprised of four basic elements, including a sensing unit, a processing unit, a transceiver unit, and a power unit. The WSN is frequently deployed for sensing the area of interest where data captured encompass light, pressure, sound, and others . Fig: Typical network of sensors

2.Motivation/Applications of WSNs.:

2.Motivation/Applications of WSNs. Among many alternative approaches, GT has been increasing applied in the design of WSNs, thus, the scope of this seminar is restricted to the use of GT for WSNs . Applications of WSN are vast and can be broadly classified into the monitoring and tracking categories. Fig:2 : Health Monitoring System. Fig:3 : Position Tracking.

3.Advantages & Disadvantages.:

3.Advantages & Disadvantages. WSN has a short system setup time. It avoid hell lot of wiring. It can accommodate new devices at any time. Sensors can be disposed with acceptable operation cost. Its damn easy for hackers to hack it as we cant control propagation of waves. Gets distracted by various elements like Blue-tooth Still Costly at large

4.What is In-Network Aggregation ?:

4.What is In-Network Aggregation ? In-network aggregation is usually performed by integrating several small packets with the same (next-hop) destination in one big packet. The most energy of sensor nodes is consumed by transmitting and receiving packets, and energy can be saved by going to sleep mode as fast as possible . fig. 1.In-network Aggregation However, the amount of exchanged data cannot be reduced, but aggregating many small packets into a big one will reduce the overhead that is created by each packet transmission and reception.

5.Why Aggregation is Needed?:

5.Why Aggregation is Needed? Fig.2.Architecture of ZigBee and In-Network Aggregation Model

6. Achievements of In Network Aggregation.:

6. Achievements of In Network Aggregation. The roles of Aggregation for WSNs are achieve that includes: A reduction in the number of packets that must be sent through the network. A reduction in the likelihood of packet collisions. A reduction in the amount of redundancy received at the host node. An increase in accuracy of results.


7.Conclusion. Aggregation mechanism as extension to a existing routing strategy in which only packets for the same (next-hop) destination are aggregated . The aggregation scheme allows aggregating packets with different (next-hop) destinations so that aggregation occurs faster , which leads to a longer lifetime of the network and a better overall QoS performance.


8.References Improving In-Network Aggregation by Exploiting the Broadcast Nature of Wireless Communications Evy Troubleyn, Lieven Tytgat, Ingrid Moerman, and Piet Demeester Ghent University { iMinds , Department of Information Technology (INTEC) { IBCN Gaston Crommenlaan 8, bus 201, B-9050 Ghent, Belgium { evy.troubleyn,lieven.tytgat,ingrid.moerman,piet.demeester }@

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