Design A Protocal - Assignment Example

Polling Overhead Polling overhead can be defined as unnecessary delay for stations with data resulting in throughput degradation. For instance, when most stations have data, sequential polling provides ordered channel access and reduce the collision, when a small number of stations possess a pending data polling, mechanisms become significant overhead.Solution to resolve the overhead.Multi-user polling mechanism is possible used to reduce overhead. One of the protocols to use is to use Media access Control. (MAC) mechanismThe job of MAC is usually to control the medium usage, usually done over a channel access mechanism.

The diagram below shows the MAC retransmission mechanism to resolve the overhead.MAC protocol also implements a positive acknowledgment and the Medium Access Control level of transmission to evade packets lose on the air.A diagram to show Medium Access Control in CSMA/C retransmission.The principle works like this: every moment the node receives packet, it will send it back immediately inform of a short message to transmitter to specify that its success in receiving the packet with no error. The transmitter will not receive acks after sending a packet, it recognizes that the packet got lost therefore it will transmit the packet.

Reasons why MAC protocol is feasibleFor MAC to be efficient for Wi-Fi sensor network, is it well defined by its energy efficiency, scalability, adaptability to change in network topology, its latency, throughput, bandwidth and fairness?Most of Medium Access Control protocol use a go and stop mechanism in order to relay the following packet of the queue. This will not happen when the current packet is correctly acknowledged. For MAC protocol not to collide, the acks are always embedded it.TCP which is working at another level and are very different from these acks.

Unlike MAC which acknowledge broadcast and multiple packets. This therefore makes MAC protocol more feasibleReferenceNaugle, Matthew G.Network protocols. Signature Ed. New York: McGraw-Hill, 1999. Print.