QUESTION 7 [20 Marks] Public telephone network Gateway MSC Public Internet B D D - Radio Interface (WCDMA, HSPA) Radio Access Network Universal Terrestrial Radio Access Network (UTRAN) Core Network General Packet Radio Service (GPRS) Core Network Public Internet Figure 7:3G System Architecture (a) Referring to Figure 7 above, give the name and description of the labeled items. [12 Marks] Choose any TWO of the following types of wireless channel impairments and EXPLAIN each. (6) (1) Path loss [2 marks] Multipath propagation [2 marks] (iii) Interference from other sources [2 marks] (c) For host mobility in wireless network, each mobile node uses two addresses. (1) State the name of these two addresses. [2 marks] (ii) What is the difference between these two addresses? [2 marks] QUESTION 7 [20 Marks] Public telephone network Gateway MSC Public Internet B D D - Radio Interface (WCDMA, HSPA) Radio Access Network Universal Terrestrial Radio Access Network (UTRAN) Core Network General Packet Radio Service (GPRS) Core Network Public Internet Figure 7:3G System Architecture (a) Referring to Figure 7 above, give the name and description of the labeled items. [12 Marks] Choose any TWO of the following types of wireless channel impairments and EXPLAIN each. (6) (1) Path loss [2 marks] Multipath propagation [2 marks] (iii) Interference from other sources [2 marks] (c) For host mobility in wireless network, each mobile node uses two addresses. (1) State the name of these two addresses. [2 marks] (ii) What is the difference between these two addresses? [2 marks]