• Subject:


  • Topic:


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


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


(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          


          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)