The document discusses new smartphones available for purchase through IIJmio, including models from Sony, OPPO, ASUS, Sharp, Motorola, and others. It provides specs, pricing, and promotions for each phone. It also reviews the history of SIM-free smartphones in Japan from 1st to 5th generations and the manufacturers that entered each generation, such as Huawei, ASUS, Freetel, Sharp, ZTE, and Motorola.
14. 14
モバイルインフラ
IIJが運用しているノード群
BSS
MNO IIJ
PDN
Radius PCRF OCS
Sy
SGSN/SGW GGSN/PGW PCEF CGN
Gn/S5
POI
Gi/SGi
AAA Gx Gy
SGSN: Serving GPRS Support Node
GGSN: Gateway GRPS Support Node
SGW: Serving Gateway
PGW: Packet Data Network Gateway
PCEF: Policy and Charging Enforcement Function
PCRF: Policy and Charging Rules Function
OCS: Online Charging System
CGN: Carrier Grade NAT
BSS: Business Support System
POI: Point Of Interface/Interconnection