3GPP协议下载地址 LTE:http://www.3gpp.org/ftp/Specs/2010-12/Rel-10/36_series/ UMTS&TDS:http://www.3gpp.org/ftp/Specs/2010-12/Rel-10/25_series/ GSM:http://www.3gpp.org/ftp/Specs/2010-12/Rel-10/45_series/