4 Calculate Packet Level Error Rate Per With Or Without Arq 7 5 Points A Assume You Have A Packet With Data Paylo 1 (28.92 KiB) Viewed 49 times
4 Calculate Packet Level Error Rate Per With Or Without Arq 7 5 Points A Assume You Have A Packet With Data Paylo 2 (27.51 KiB) Viewed 49 times
4. Calculate packet level error rate (PER) with or without ARQ. (7.5 points) a) Assume you have a packet with data payload of 1764 bytes. The packet header is 16 bytes. Assume there is no other overhead. The current wireless channel bit error rate (BER) is 0.0001. What is the packet level error rate (PER) with a single transmission attempt? (2.5 points) b) Assume you are not satisfied with the above PER. Keeping all factors the same as described in (a), except adding ARQ retries, you propose to have 3 additional ARQ retries applied, (i.e. total rounds of transmissions are 4, including 1 initial transmission). What is the PER after retries? (2.5 points)
c) Assume you are still extremely disappointed with the PER, and you decide to spend some money to completely upgrade the wireless system. In the new wireless system, you propose to reduce the packet size with data payload of 1280 bytes. The packet header is reduced to 12 bytes. Assume there is no other overhead. You also upgrade to new wireless physical layer units, and now the current wireless channel BER is 0.00005. You also propose to have 4 ARQ retries applied, (.e. total rounds of transmissions are 5. including I initial transmission). What is the PER after retries? (2.5 points)
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