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A cellular system has uniform traffic load in each cell. The call arrival rate is 120 calls/minute. The average call holding time is 4 minutes and average cell dwelling time is 2 minutes. Each cell has 280 voice channels. Given that a call will handoff, the probability that the call moves to each neighbouring cell is equal. The call

A cellular system has uniform traffic load in each cell. The call arrival rate is 120 calls/minute. The average call holding time is 4 minutes and average cell dwelling time is 2 minutes. Each cell has 280 voice channels. Given that a call will handoff, the probability that the call moves to each neighbouring cell is equal. The call

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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A cellular system has uniform traffic load in each cell. The call arrival rate is 120 calls/minute. The average call holding time is 4 minutes and average cell dwelling time is 2 minutes. Each cell has 280 voice channels. Given that a call will handoff, the probability that the call moves to each neighbouring cell is equal. The call blocking probability of each cell (BB) can be modelled by the Erlang fixed-point approximation approach. Using the method of successive substitution, with an initial guess of 00 = 180 calls/minute, a tolerance limit of 0.1% and Erlang B table, calculate BB. Show the result of each iteration by completing the following table. iteration 0 0/(μ+88) B B absolute relative difference in B1 (%) 1 180 2 3
Transcribed Image Text:A cellular system has uniform traffic load in each cell. The call arrival rate is 120 calls/minute. The average call holding time is 4 minutes and average cell dwelling time is 2 minutes. Each cell has 280 voice channels. Given that a call will handoff, the probability that the call moves to each neighbouring cell is equal. The call blocking probability of each cell (BB) can be modelled by the Erlang fixed-point approximation approach. Using the method of successive substitution, with an initial guess of 00 = 180 calls/minute, a tolerance limit of 0.1% and Erlang B table, calculate BB. Show the result of each iteration by completing the following table. iteration 0 0/(μ+88) B B absolute relative difference in B1 (%) 1 180 2 3
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