Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Moon Soo Jang

Hyeong Jun Park

Nam Hoon Park

Jee Hwan Ahn

Mi Jeong Yang

Ae Soon Park

Hyung Deug Bae

Soon Yong Lim

You Sun Hwang

Kwang Ryul Jung

Hye Yeon Kwon

Jae Deug Jang

A method of providing service continuity between cellular communication and device-to-device communication is disclosed. A procedure for switching between cellular communication and device-to-device communication according to an example embodiment of the present invention may include transferring, by a gateway, a D2D bearer creation request message to an MME, transferring, by the MME, the D2D bearer creation request message to a base station, mapping, by the base station, D2D bearer QoS to D2D radio bearer QoS and transmitting an RRC connection reconfiguration message to terminals, receiving, by the base station, an RRC connection reconfiguration completion message indicating creation of a D2D radio bearer from the terminals, transmitting, by the base station, a D2D bearer creation response message indicating creation of a D2D bearer to the MME, and transferring, by the MME, the D2D bearer creation response message to the gateway.

Method of providing service continuity between cellular communication and device to-device communication

The present invention relates to an apparatus and method for monitoring a battery lifespan of a machine type communication device, and more particularly, to an apparatus and method for preventing a disconnection in communication due to a battery being expended by verifying a battery lifespan of the machine type communication device in a network. The present invention may include detecting a residual capacity of a battery power supply, comparing the residual capacity of the battery power supply to a threshold required for a power supply, and warning against a shortage of the residual capacity of the battery power supply when the residual capacity of the battery power supply is less than or equal to the threshold required for the power supply.

Apparatus and method for monitoring battery lifespan of machine type communication device

A radio network controller of an IMT-2000 asynchronous system that includes a Node-B matching radio access system for accessing to a Node-B; a traffic processing radio access system for performing a soft handover of radio traffic channels of the base transceiver stations; and an ATM switch accessible to the traffic processing radio access system, for providing a path for communicating traffic and control data in the radio network controller, switching ATM cells, providing a path for transmitting various traffic between radio network controllers and soft handover between the radio network controllers. The radio network controller further includes a network matching radio access system for accessing to the ATM switch and a core network; a network synchronization system for generating and providing clocks needed for the radio network controller; a radio network controller controlling system for performing a call processing and a radio signal accessing by controlling the ATM switch; and a radio access network operation & maintenance system for managing and maintaining the base transceiver station and the radio network controller through an 100Base-T Ethernet path and the ATM switch path.

Radio network controller in IMT-2000 asynchronous system

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Daejeon, South Korea

Moon Soo Jang