Question: Please ... I need answer to this Q ... Q) A key design decision for ATM is the size of the data field for fixed-size

Please ... I need answer to this Q ...

Q) A key design decision for ATM is the size of the data field for fixed-size cells. Let us consider this decision from the point of view of efficiency and delay. Define L = Data field size of the cell in octets H = Header size of the cell in octets a. Assume that an extended transmission takes place, so that all cells are completely filled. Derive an expression for the transmission efficiency N as a function of H and L, where the transmission efficiency is defined as N = Number of information (octets) / [Number of information (octets) + Number of Overhead (octets)].

b. Packetization delay is the delay introduced into a transmission stream by the need to buffer bits until an entire packet is filled before transmission. Derive an expression for this delay as a function of L and the data rate R of the source.

c. Common date rates for voice coding are 32 kbps and 64 kbps. Plot packetization delay as a function of L for these two data rates: use a y-axis with a minimum value of 2ms, and assume that H = 5 octets. Also plot transmission efficiency as a function of L. Use a y-axis with a maximum value of 100% .

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