telephonymanager - Android: How to calculate speed of the mobile internet(Upload speed) using signal strength by programatically -

in android, able find strength of signal using below code,

   protected int getsignalstrength(signalstrength signal) {             string ssignal = signal.tostring();             string[] parts = ssignal.split(" ");              int db = -120; // no signal measured when returning -120 db              // if lte              if (telephonymanager.getnetworktype() == telephonymanager.network_type_lte){                  int ltesignal = integer.parseint(parts[9]);                  // check see if get's right signal in db, signal below -2                 if(ltesignal < -2) {                     db = ltesignal;                 }             }             // else 3g             else {                  if (signal.getgsmsignalstrength() != 99) {                      int strengthinteger = -113 + 2 * signal.getgsmsignalstrength();                     db = strengthinteger;                    }             }              return db;         } 

how calculate speed of mobile internet(upload speed / download speed) using signal strength programatically?? quesion?

facebook released library this:

https://github.com/facebook/network-connection-class

library description:

listen current network traffic in app , categorize quality of network.