My teacher give me such a title:
The experiment a
1. Sending an android mobile phone, send two sound, two consecutive times voice signal launch time strict limit of 100.01 ms
2. The receiver a android phones, receive the two signals, to see if the time received 100.01 ms
Experiment 2
1. Sending two android phones. A, B,
A first sent voice signal; Voice signal length 10 ms
B again sent voice signal; Voice signal length 10 ms
Sound signal of two times the strict limit of 100.01 ms
2. The receiver a android phones, receive the two signals, to see if the time received 100.01 ms
I check a lot of information on the Internet, but because I don't know how to do, so now there is no clue, if you know, can you describe briefly?