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  • Subject:

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  • Topic:

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(a) Distinguish between point to point and boardcast modes of communication. Give an example of 

      each.

(b) Expalin the basic concept of mobile telephoning.                                  (3 marks)

Explanation:

(a)   In point to point communication mode, communication takes place over a link between a single

        transmitter and a receivers corresponding to a single transmitter. 12 marks

        In broadcast mode, there are a large number of receivers corresponding to a single transmitter.

                                                                                                                           12 marks          

Examples: 

          Point to point : telephony                                 12 marks

           Boardcast : radio / Television                            12 marks      

 

(b) The service area is divided into a suitable number of hexagonal cells centered on MTSO ( Mobile

     Telephone Switching Office). Each cell contains a low-power transmitter called a base station and

     caters to a large number of mobile receivers / cell phones. When a mobile receiver crosses one

     base station it is handed over to another base station. It is called handover or handoff.                                                                                                                                                          (1 marks)

BOARD