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                                 FMC Internal Handover Algorithm

    In  Dual Mode Cellular Phones, the suggested algorithm is

    executed by Differential Comp Access Method.

   The pseudo code of the handover algorithm is like the following.                                                 

    It is defined in Different Module Schemes, all these system modules are the pre-requisite`s

    for their (i-1) th module in a single scan.

    Scan repetition time is assumed constant , how ever it can be set manually.

Module < 0 to 3 >

Module 0;

    MAIN_SCAN:

            in_use AP                           // Information of the Network that is Currently In Use

                      {

                         (A)  det1 = Sig Intensity(1-6);          ..........................Equal Energy Levels

                         (B)  det2 = Receiver_Log;                          Connection, GoS,data rate

                         (C)  det3 = Extr;

                         (D)  freq  in_use    // Normally it is the Best way for Comparator  to  

                                                                                                      Differentiate

                      }                                                                  between GSM and WIFI

             secondary AP                  //  Information of the Secondary Network

                      {

                          (A) det1 = Sig Intensity(1-6) ;          .........................Equal Energy Levels

                          (B) det2 = access_rights ;                         Check for the Access Rights

                          (C) det3 = Extr;

                           (D) freq secondary     // At Which frequency this Network is Operating,  

                                                                                the Best way

                     }                                                          to differentiate  in this  particular Handover       

Module 1;                    

   AUTO_COMPARISON                               // Cell phone compares Both Networks by

                                                                                               its

                                                                                               Built-in config`s.

                       in_use : secondary

               IF   AUTO_COMPARISON =  Fail;     THEN;

                     MANUAL_PRIORITY_SETTINGS        // then just Consider Manual settings

                       comparison_log

                  ENDIF

   MANUAL_PRIORITY_SETTINGS  (net1, net2.....netn)

                                 1. default                  // previous saved settings/ Default Settings

                                  2. user defined      // to which Network the USER wants to connect.

                                 SETTINGS_LOG

Module 2;   

    SELECTION_PANNEL:

                             SELECT max_net =2

                             PRIORITY_SETTINGS: // Normally User Prefer WIFI in Most Cases

                                                                  WIFI =  high        // So We Give it High Priority

                                                                  GSM =  sec          // in case WIFI Network is

                                                                                                         Not available

                            DECISION         SETTINGS_LOG AND  PRIORITY_SETTINGS

                       Send To          DECISION_REGISTER  // store the Final Decision in

                                                                                                 Decision Register

Module 3;

  ACCESS_PANNEL;                     //  Establish the Connection to Pointed Network in Decision Reg.

                            EXECUTING    DECISION_REGISTER

       access_list 

FOR i= 0 to log_max

                        {             

                            SCANNING for *NET         ( i =  0,1,...log_max)

                  Handover_Request  to Secondary_AP

                           Establish CONNECTION     ( i =  0,1,....log_max) //    Connect Cell

                                                                                                              Phone to

                                                                       New Selected Network(1^st Pointed Entry)

                           Connection_Log                         // Store in Connection Log

       IF      access_error      THEN                          // in case Connection Lost

                               JUMP to  access_list

                     STOP;                

ENDIF;

ENDFOR;

}                                                             

Note:  If the Connection to  i=0  in   "access_list"  is Not Successful,

          Connection_log=NULL  ; So Check for i=1 Entry ,and so on...

                                                                 BTE-F04-35     M.Zubair Pansota       

                                                                 BTE-F04-81     ShahzadAlam Khan

                                                                 BTE-F04-67     Qasim Ali

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