Wireless Sensor Networks are an emerging technology, poised for rapid market growth and are being increasingly deployed for surveillance and monitoring applications. These networks suffer from severe congestion, packet loss, unfair utilization of bandwidth and unreliable data delivery to destination. Owing to the revolution of new technology, wireless sensor networks should be able to cope with multimedia traffic and delivery of data by a specific time. In this paper an overview of medium access control and transport layer protocols has presented and the recommendation of a cross layer design among the two layers has been discussed in order to alleviate the problems encountered and disunity by these two layers. Having an overall improvement with these two layers will conserve on energy consumption.
WSN, protocols, MAC, nodes, congestion, reliability, energy
