Block call cleared system

Question 2: For a particular block call cleared system, each hexagonal cell has 60 channels and radius of 10 km. The grade of service is established to be a probability of block of 2%. Assume the path loss exponent a is 4, the average call length is X minutes, and each user has Y calls per hour. (a) Determine the cell capacity (i.e. maximum number of users can be supported per cell). Note: The Erlangs B and Erlangs C charts are given in the lecture notes. (b) Determine (i) the minimum cluster size N and (ii) the first-tier co-channel cell distance D to achieve the SIR requirement of 19 dB if only the first-tier of interfering cells are considered. Hints: some cluster sizes are invalid. (7 marks) (6 marks)