Talking about 3G and GSM-R in China
Shupin Li · Sci-Tech Information Development & Economy · 2010
This paper introduces the concept of 3G, the functions of 2.5G, the standard OF 3G, the connotation of GSM, and the special functions of GSM-R (GSM for Railways)in railway's mobile communications equipment, and looks forward to the future development of 3G and GSM-R.