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tinaxiao
22.01.2021 •
Computers and Technology
A large population of Aloha users manages to generate 50 requests/sec, including both originals and retransmissions. Time is slotted in units of 40 msec.a. What is the chance of success on the first attempt at a given station?b. What is the probability of exactly k collisions (for k = 1, 2,...,10) followed by a success?c. What is the expected number of transmission attempts needed?
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Ответ:
a) 0.1353
b) attached below
c) 7.4
Explanation:
Frame transmission rate = 40 msec
Total load requests = 50 requests /sec
hence
Total arrival rate G in Frames ( G ) / x secs
= 50 request/sec * X sec
= 50 * ( 40*10^-3 )
= 2 requests/ x sec
a) Determine chance of success on first attempt
0.1353
b) Determine the probability of exactly K collisions followed by a success
attached below
c) what is the expected number of transmission attempts needed
7.4
Ответ: