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If λ is mean arrival rate and τ is the packet duration, then traffic occupancy of a packet radio network is equal to _________

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If λ is mean arrival rate and τ is the packet duration, then traffic occupancy of a packet radio network is equal to _________

(a) λτ

(b) λ/τ

(c) λ-τ

(d) λτ^2

I got this question during an interview.

The above asked question is from Packet Radio in section Multiple Access Techniques for Wireless Communications of Wireless/Mobile

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Correct option is (a) λτ

The explanation: If λ is mean arrival rate and τ is the packet duration, then traffic occupancy or throughput of a packet radio network is equal to λτ. The unit of R is in Erlangs.

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