How does it optimise handovers in cellular networks, Computer Networking

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Question:

(a) In relation with a cellular network architecture, describe the following terms:

(i) Clusters
(ii) Pico cells
(iii) Nano cells
(iii) Cell breathing

(b) What is the HO_Margin and how does it optimise handovers in cellular networks?

(c) Describe how a Mobile Terminating call, from a PSTN phone, is processed in a GSM network. Explain your answer with a diagram.

(d) Describe the different type of handovers available in UMTS and state which ones are soft or hard handovers. Explain your answer with a diagram.

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