Abstract:
Provided is a method for transmitting a file based on a multiplex forwarder using a session join time interval. The method includes the steps of: a) transmitting a session join request message to a source and joining to a corresponding session; b) when a member joins the session, transmitting a forwarder candidate list request message to the source and receiving a forwarder candidate list; c) skipping a specific member among members on the transmitted forwarder candidate list; and d) transmitting a forwarder request message to the members on the forwarder candidate list excluding the specific member, selecting a member permitting the request as a forwarder, and receiving a gift, which is a packet, from the selected forwarder.
Abstract:
A power saving method of the present invention is provide for a wireless sensor network including a plurality of sensor nodes each transiting between a power saving mode and a transmit/receive mode, determines whether or not there is no transmit or receive data, enters the power saving mode if there is no transmit or receive data, and controls power consumption on the basis of signal-to-noise ratios in the power saving mode. In the power saving method of the present invention, it is possible to minimize the power consumption regardless of nodes density and without an adverse effect on the connectivity of the network, since the sojourn times of the sleep and idle states are determined adaptive to the interference level from neighboring nodes.
Abstract:
Provided are an automatic operation system for automating satellite control operation, a method thereof, and an automatic satellite ground control system using the same. The object of the present research is to provide an automatic operation system that can reduce operation manpower and cost by automatically operating an entire satellite ground control system, which requires a plurality of operators to be properly operated, all the times, a method thereof, and an automatic satellite ground control system using the same. The satellite ground control system of the present research includes: a mission timeline receiving unit, an operation procedure editing unit, an operation procedure analyzing and code transforming unit, an operation procedure executing unit, a subsystem process state monitoring unit, and an access managing unit for providing interface with each of the subsystems.
Abstract:
A method of forming a flash memory device in a memory cell region of a substrate includes forming a first insulating layer on the substrate, forming a first conductive layer on the first insulating layer, forming trench isolation regions in the substrate extending through the first conductive layer and the first insulating layer to define an active region in the memory cell region between the trench isolation regions, and selectively removing the first conductive layer and the first insulating layer from the memory cell region of the substrate to expose a surface of the active region between the trench isolation regions.
Abstract:
An apparatus and method for providing a seamless communication service in a mobile communication system. The method includes transmitting a first message to a base station when an IP subnet has been changed due to movement of the portable terminal, the first message including a Medium Access Control (MAC) address of the portable terminal, receiving IP address information from the base station, which can be used in a new IP subnet, and configuring a new IP address based on the received IP address information.
Abstract:
A flash memory device includes active regions formed in a semiconductor substrate. The active regions include a cell array region, a high voltage transistor region and a low voltage transistor region. Gate structures are formed across the active regions, source and drain regions are formed at both sides of the gate structures in the active regions and lower spacers are formed at both sides of the gate structures. The lower spacer fills a space between the gate structures over the source region and is formed of a silicon oxide layer.
Abstract:
A channel scanning method and system at an MP within a mesh network associated with a local network are provided. A MAP sends a local management frame including information about a mesh network on an allocated local channel and sends a mesh management frame on a mesh channel indicated by the mesh network information. An MP scans a plurality of channels including the local channel and the mesh channel in an order of channels numbers, receives the local management frame by scanning the local channel, and receives the mesh management frame by scanning the mesh channel based on the mesh network information of the local management frame.
Abstract:
An internal voltage generator for memory bank peripheral circuitry, a semiconductor memory device having the internal voltage generator, and a method for generating an internal voltage are provided. A switchable internal voltage generating circuit according to the present invention includes a control section and an internal voltage generating circuit. The control section generates a control signal in response to a bank activation command and a bank activation signal for enabling memory banks. The internal voltage generating circuit receives a reference voltage, and responds to the control signal to output an internal voltage equal to the reference voltage. The control signal is enabled when the bank activation command and the bank activation signal are concurrently enabled. The bank activation signal is generated in response to a bank address. The internal voltage can be supplied only to peripheral circuits of the banks selected by the bank address, thereby preventing unnecessary power consumption, effectively controlling the internal voltage, and always properly supplying the internal voltage.
Abstract:
Provided are an automatic operation system for automating satellite control operation, a method thereof, and an automatic satellite ground control system using the same. The object of the present research is to provide an automatic operation system that can reduce operation manpower and cost by automatically operating an entire satellite ground control system, which requires a plurality of operators to be properly operated, all the times, a method thereof, and an automatic satellite ground control system using the same. The satellite ground control system of the present research includes: a mission timeline receiving unit, an operation procedure editing unit, an operation procedure analyzing and code transforming unit, an operation procedure executing unit, a subsystem process state monitoring unit, and an access managing unit for providing interface with each of the subsystems.
Abstract:
A method for soft-combining MBMS (Multimedia Broadcast/Multicast Service) data in an asynchronous mobile communication system including a user equipment (UE) and a radio network controller (RNC), wherein the system provides an MBMS service. In the method, the RNC measures a round trip delay (RTD) for a primary cell in which the UE is located, and an RTD for each of the neighbor cells neighboring the primary cell. The RNC transmits the MBMS data at the same transmission time by considering the RTDs for the primary cell and the neighbor cells so that the UE can receive requested MBMS data. The UE receives MBMS data transmitted from the respective cells at the same transmission time, and performs soft combining on the received MBMS data.