Samsung Electronics Co., Ltd.

Seoul National University

Agency for Defense Development

Young-June Choi

Sae-Woong Bahk

Sang-Boh Yun

Sung-hyun Cho

Mi-Sun Do

Neung-Hyung Lee

Won-Hyoung Park

SaeWoong Bahk

Seung-young Park

Bongsoo Roh

Jong-Tack Kim

Hyungsin Kim

A system for downlink transmission using heterogeneous power includes a plurality of sensor nodes, a coordinator connected to a network including the plurality of sensor nodes and configured to transmit data to the plurality of sensor nodes, a power source configured to supply power required for the coordinator to transmit data to each of the plurality of sensor nodes through a single transmission passage at a position away by a specific distance from the network, to the coordinator, and a battery configured to supply power required for the plurality of sensor nodes to perform communication within the network, to the plurality of sensor nodes, wherein when a destination node as a reception target of the data, among the plurality of sensor nodes, receives the data, the destination node transmits a signal indicating the data reception to the other remaining nodes among the plurality of sensor nodes.

System for downlink transmission using heterogeneous power

A resource allocation method in a multicarrier communication system where a base station allocates resources to a plurality of mobile stations according to feedback channel information from the mobile stations. The base station receives a resource request message from each mobile station and selects a set of mobile stations offering a maximum system gain without overlapped resources at a specific point in time based on the resource request messages from all mobile stations in the system. The requested resources and then allocated to the selected mobile stations.

Resource allocation method in a multicarrier communication system

Disclosed is a handover method for an IP-based next generation mobile communication system. With a handover method including 1) determining whether or not a predetermined mobile terminal goes into the overlapping area; 2) starting a Layer(L) handover operation between the neighboring access routers as the mobile terminal goes into the overlapping area; 3) if the Layerhandover operation between the neighboring access routers is completed, establishing a data path for the mobile terminal to pass through an access router after the Layerhandover; 4) if the mobile terminal leaves a cell area including the mobile terminal in steps 2) and 3), performing by the mobile terminal Layerhandover between cells and receiving by the mobile terminal data through a cell base station after the Layerhandover and an access router before the Layerhandover; and 5) if the mobile terminal leaves a cell area including the mobile terminal after step 3), performing by the mobile terminal Layerhandover between cells and receiving by the mobile terminal data through a cell base station after the Layerhandover and an access router after the Layerhandover.

Handover method for next generation mobile communication system having overlapping area

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Seoul, South Korea

Young-June Choi