Asynchronous TDMA Based MAC Protocol for Fast and Efficient Data Collection in Wireless Sensor Networks
 | International Journal of Computer Trends and Technology (IJCTT) |  |
| © - August Issue 2013 by IJCTT Journal | ||
| Volume-4 Issue-8 | ||
| Year of Publication : 2013 | ||
| Authors :Shabana V V, Shiju Kumar P S |
Shabana V V, Shiju Kumar P S "Asynchronous TDMA Based MAC Protocol for Fast and Efficient Data Collection in Wireless Sensor Networks "International Journal of Computer Trends and Technology (IJCTT),V4(8):2462-2465 August Issue 2013 .ISSN 2231-2803.www.ijcttjournal.org. Published by Seventh Sense Research Group.
Abstract:- Wireless sensor network (WSN) are deployed in number of scenarios and in most cases, the data collection rate and the reliability of the data collected plays the crucial role. The key application scenario of wireless sensor networks is data gathering: sensor nodes transmit data, possibly in a multi-hop fashion, to an information sink. The performance of sensor networks is thus characterized by the rate at which information can be aggregated to the sink. A number of techniques are concerned so far using realistic simulation models to address the speed of data collection. One technique is by considering TDMA scheduling on a single channel, reducing the original problem to minimizing the number of time slots needed to schedule each link of the aggregation tree. The second technique is to combine the scheduling with transmission power control to reduce the effects of interference. To better cope with interference, the impact of utilizing multiple frequency channels by introducing a simple receiver-based frequency and time scheduling approach is applied. For networks of about a hundred nodes, the use of multi-frequency scheduling can suffice to eliminate most of the interference. The data collection rate then becomes limited not by interference, but by the maximum degree of the routing tree. A more effective approach identified, to enhance the rate of data collection in wireless sensor networks, is the one that take advantage of all these techniques and applied hierarchically to achieve a higher data collection rate. However, if a device has no data to send during a particular time slot, that slot is wasted Also, if data is of larger size then it cannot be transmitted in the particular slot. Here, these two problems are addressed and appropriate solutions are encountered by making use of a new protocol.
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Keywords : — — Convergecast, TDMA scheduling, multiple channels, power control, asynchronous TDMA protocol.