发明名称 |
USER DEVICE, GATEWAY DEVICE, RADIO BASE STATION, MOBILE COMMUNICATION SYSTEM, AND MOBILE COMMUNICATION METHOD |
摘要 |
Provided are a user device, a gateway device, a radio base station, a mobile communication system, and a mobile communication method capable of considerably reducing the number of control signals necessary for Small Data Transmission (SDT). A UE 100 transitions from RRC-IDLE state where no communication bearer in the control plane is established and EMM-IDLE state where communication in the user plane is not enabled to RRC-CONNECTED state where a communication bearer in the control plane is established and the EMM-IDLE state. The UE 100 transmits user data inputted into the UE 100, via the communication bearer in the control plane in the RRC-CONNECTED state and the EMM-IDLE state. In addition, the UE 100 transitions from the RRC-CONNECTED state and the EMM-IDLE state to the RRC-IDLE state and the EMM-IDLE state as soon as the transmission of the user data is completed. |
申请公布号 |
US2015358954(A1) |
申请公布日期 |
2015.12.10 |
申请号 |
US201414762502 |
申请日期 |
2014.01.21 |
申请人 |
NTT DOCOMO, INC. |
发明人 |
Koshimizu Takashi;Ali Irfan |
分类号 |
H04W72/04;H04W76/02;H04W88/16 |
主分类号 |
H04W72/04 |
代理机构 |
|
代理人 |
|
主权项 |
1. A user device including: a radio resource control unit configured to perform a process in a control plane according to radio resource control; and a mobility management unit configured to perform mobility management of the user device and enable a process in a user plane, the user device comprising:
a state control unit configured to cause the user device to transition from RRC-IDLE state where no communication bearer in the control plane is established, and EMM-IDLE state where communication in the user plane is not enabled, to RRC-CONNECTED state where a communication bearer in the control plane is established and the EMM-IDLE state; and a data transmission unit configured to transmit user data inputted into the user device, via the communication bearer in the control plane in the RRC-CONNECTED state and the EMM-IDLE state, wherein the state control unit causes the user device to transition from the RRC-CONNECTED state and the EMM-IDLE state to the RRC-IDLE state and the EMM-IDLE state as soon as the transmission of the user data by the data transmission unit is completed. |
地址 |
Tokyo JP |