Exercise 4. Suppose there is a 10 Mbps link between a geostationary satellite A and its base station on Earth. Every minute the satellite takes a digital photo and sends it to the base station. Assume the propagation speed of 2.5 x 10s meters/ sec. (a) What is the propagation delay of the link? b) What is the bandwidth-delay product? (c) Let T denote the size of the photo. What is the minimum value of T for the microwave link to be continuously transmitting? d) Suppose the transmission has to be further carried out from base station A to the next geostationary satellite. What will be the overall transmission delay in that case from satellite A to satellite B assuming the transmission rate to be the same and the size of the photo equal to the one calculated in part (c). Assume: Distance between the satellite and the earth is 22369.363 miles. Hints for Exercise 4 1. Propagation delay-Distance travelled / propagation speed 2. Bandwidth-delay productBandwidth Propagation delay 3. What does it mean for the microwave link to be "continuously transmitting"? o When the last bit of the current photo is transmitted to the link, the first bit of the next photo gets transmitted to the link o Simply put, there are no gaps in between two photos. Next photo Current photo Microwave Link 4. Remember that we are only considering transmission delay