Question

P6-4. guard band or control) in each hierarchy level (group, supergroup, master group, and jumbo group). We need to use synchronous TDM and combine 20 digital sources, each of 100 Kbps. Each output slot carries 1 bit from each digital source, but one extra bit is added to each frame for synchronization. Answer the following questions: a. What is the size of an output frame in bits? b. What is the output frame rate? c. What is the duration of an output frame? d. What is the output data rate? e. What is the efficiency of the system (ratio of useful bits to the total bits)? DELILILL

Answer 1

Solationi Given that, We have 20 digital Sources, each of lookbps Output slot carries I bit Each digital Source From this, avaiable each Earrying i 20 output slots are 1 bit. (2) Each fr Each - So frame has an extra bit, when frame is zobits long by adding 1 Extra bit. We get 21 bits Size of the output frame = 21 bits. output frame rate = 1 x 100 kbps = 100000 frames/sec Sends a bit of data. flore the Source (c) Duration of output frame = Frame Rate (d, 100000 = 105 sec output data rate = nooot frames & no. of bits = 100000 x 21 = 2.1 x 100 bitt/sec = 2.1 Mbps. Used bits Efficiency of the system that = 20 x100 = 0.95 x/ou (e) = 95%