13GPP TS 23.060 General Packet Radio Service(GPRS);Service de-scription;Stage 2[S/OL].[2011-12-10].http://www.quintillion.co.jp/3GPP/Specs/23060-851.pdf.
23GPP TS 23.401 General Packet Radio Service(GPRS)enhancementsfor Evolved Universal Terrestrial Radio Access Network(E-UTRAN)access[S/OL].[2011-12-10].http://www.quintillion.co.jp/3GPP/Specs/23401-a00.pdf.