Abstract: A handoff system and method between different kinds of devices, an SIP server and an application method of the SIP server applied thereto. The handoff system between different kinds of devices includes a plurality of devices; a SIP server which requests a routing path update when a handoff request signal is input from a source device among the plurality devices, and getting a target device to participate in a current session; and a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmitting data to the source device and the target device via the updated routing path.

Abstract: Provided is an apparatus and method for transmitting/receiving signals in a communication system. A base station allocates a quasi-dedicated control channel (QDCCH) to a first mobile station (MS), and allocates the QDCCH allocated to the first MS, to a second MS for a preset time. An MS receives a QDCCH allocated from the base station. If there is data to transmit to the base station, the MS determines whether the QDCCH is allocated to another MS different from the MS. If it is determined that the QDCCH is allocated to the MS itself, the MS transmits the data to the base station over the QDCCH.

Abstract: A method and system for allocating a channel are provided in a communication system including a plurality of Mobile Stations (MSs) and Base Stations (BSs) for providing a communication service to the plurality of MSs. A BS transmits an average Channel Quality Information (CQI) request to MSs. The MSs measure CQI with respect to their channels in response to the request from the BS, compute average CQI from the measured CQI, and transmit the average CQI to the BS. The BS selects a predefined number of MSs according to the average CQI received from the MSs and sets an MS group. The BS transmits a CQI request to the MS group. The MSs of the MS group transmit the CQI to the BS. The BS receives the CQI from the MS group and allocates a channel according to the CQI.

Abstract: A method for feeding back a Channel Quality Indicator (CQI) in a mobile communication system is provided. The method includes determining a number of subchannels for which the MS feeds back CQIs based on a preset feedback efficiency factor, selecting the determined number of subchannels in a descending order of channel quality, and feeding back the CQIs of the selected subchannels to a Base Station (BS).

Abstract: A system is provided for authentication between a mobile device (MD) and a sink using a mobile communication network. If a sink authentication request for the sink is received from the MD, a base station (BS) sends a sink authentication response including sink authentication information for the sink, to the MD. The MD forwards the sink authentication request for the sink to the BS, and if a sink authentication response is received from the BS, authenticates the sink using the received sink authentication information. The sink performs authentication with the MD.

Abstract: The present invention relates to modality conversion for supporting Quality of Service (QoS) according to media resources, which includes the steps of receiving a modality conversion descriptor in which the characteristics of the modality conversion of the multimedia contents are described, receiving the multimedia contents, and converting the modality of the multimedia contents into a modality determined according to a media resource and the modality conversion descriptor. According to the present invention, a systematic approach to a design for an overlap content value model is provided so that the conversion boundaries between modalities can be quantitatively calculated. As a result, the correlation between various modalities can be established in a single model, and modality conversion supporting the optimal QoS can be performed.

Abstract: An apparatus and method for determining a beamforming vector in a codebook-based transmission beamforming system are provided. In a feedback method for a receiver in a codebook-based transmission beamforming system, forthcoming channel values for a forthcoming period are generated using M present and previous channel estimates. Effective channel gains for all transmission beamforming vectors included in a codebook are calculated using the forthcoming channel values. A codebook index corresponding to the maximum effective channel gains is fed back to a transmitter.

Abstract: A system and method for transmitting resource allocation information in a wireless communication system is provided. A transmitter transmits resource allocation information mapped to a current time interval in a first region to a receiver, and transmits resource allocation information mapped to a next time interval in a second region. When receiving the resource allocation information of the second region, the receiver notifies the transmitter whether the resource allocation information has been received. The transmitter receives notification that the resource allocation information of the second region has been received and transmits resource allocation information mapped to a subsequent time interval in the second region.

Abstract: A method of reporting channel state information by a Mobile Station (MS) in a mobile communication system is disclosed. The method includes measuring a state of a downlink channel for the entire frequency band, determining a first Modulation and Coding Scheme (MCS) level corresponding to the measured channel state, and reporting the determined MCS level to a Base Station (BS).

Abstract: A method for allocating a sub-channel in a wireless communication system is disclosed. The method includes measuring a moving velocity of each of mobile stations (MSs); selecting MSs to which a sub-channel is to be allocated; determining a resource allocation period for sub-channel allocation to the MSs using the measured moving velocity; calculating an average amount of data to be transmitted for the determined resource allocation period, and sending a channel quality information (CQI) request to the MSs; upon receipt of CQI in response to the CQI request, allocating a sub-channel satisfying the average data amount taking the CQI into account; and transmitting a control signal for the sub-channel allocation to the MSs.

Abstract: The present invention relates to a method of systematically and synthetically accessing modality conversion that is an important part in the contents adaptive conversion process of a universal multimedia access system. The present invention provides an effective method of solving a problem, which is incurred at the time of modality conversion and still remains as one of difficult problems incurred during adaptive contents conversion. For this purpose, the present invention includes overlapped contents modeling newly proposed to determine modality conversion, a method of flexibly and clearly expressing and applying user preference for the modality conversion, and a resource allocation method of distributing resources among complicated contents based on the user preference. As a result, the integration of the above three methods provides a synthetic solution, particularly, to a problem incurred in the modality conversion and, generally, to a problem incurred in the adaptive conversion of contents.

Abstract: Provided are a system and a method for allocating resources in a communication system. The method includes mapping a Transmission Time Interval (TTI) class according to channel information transmitted from a mobile station and service class information of the mobile station; and allocating resources by dynamically configuring a frame based on the mapped TTI class.

Abstract: Provided is a sub-harmonic frequency mixer having a structure in which two terminals of transistors receiving a Radio Frequency (RF) signal and a Local Oscillation (LO) signal are coupled. The frequency mixer is composed of a single-level structure of transistors and thus can be driven at a lower supply voltage compared to a common frequency mixer. A direct-conversion receiver employing such a frequency mixer needs an RF signal and an LO signal sources of single-phase. Therefore, the direct-conversion receiver has an architecture that simplifies a whole RF transceiver circuit and thus can be advantageously applied in implementing SoC (System-on-Chip) for a low power, high integration, low price and subminiature wireless transceiver circuit.

Abstract: Disclosed is an electronic component bonding method which interposes a bonding resin between first and second electronic components to bond the first and second electronic components to each other. The electronic component bonding method includes providing the bonding resin between the first and second electronic components, aligning the first and second electronic components with each other, pre-curing the bonding resin to generate elasticity in the bonding resin, performing a main curing operation to apply vibration energy to the bonding resin, which has elasticity according to pre-curing, to securely fix the first and second electronic component to each other, and control the amplitude of the vibration energy applied during the main curing operation to be restricted within an elastic region of the bonding resin.

Abstract: A memory system includes a memory controller, a transmission bus, a power divider, a first memory chip, and a second memory chip. The transmission bus is coupled from the memory controller to a first node of the power divider for transferring signals. The first node of the power divider is coupled to a second node of the power divider via a first line, and the first node is also coupled to a third node of the power divider via a second line. The first memory chip is coupled to the second node via a first branch bus and the second memory chip is coupled to the third node via a second branch bus. Accordingly, reflected wave due to an impedance mismatching can be reduced to enhance the signal integrity.

Abstract: Disclosed are smart digital modules, a smart digital wall combining the smart digital modules, a context-aware interactive multimedia system, and an operating method thereof. The smart digital wall includes local coordinators for controlling the smart digital modules, and a coordination process for controlling the smart digital modules. The smart digital modules sense ambient states and changes of states and independently display corresponding actuations. The coordination process is connected to the smart digital modules via radio communication, and combines smart digital modules to control collective operations of the smart digital modules.

Abstract: A method quickly resuming a downlink service in a hard handover in a cellular mobile communication system. To provide the fast downlink service to an MS during a hard handover from an OBS to an NBS, the NBS receives handover user information from the OBS, and generates an MS temporary ID using the handover user information to identify the MS. If user data is generated for the MS before a connection is established for traffic transmission between the MS and the NBS, the NBS transmits the user data to the MS on an HCCH using the MS temporary ID.

Abstract: Disclosed herein is a subwindow setting method for a face detector for detecting whether one or more facial images exist in each of subwindows having a set size while sequentially setting the subwindows in the width direction of an input image. A scan interval between two neighboring subwindows under consideration in the width direction is determined based on the facial color density of a first subwindow of the two neighboring subwindows. Further, a scan interval between the first and second rows in a height direction of the input image is determined based on the facial color density of the subwindows included in the first row.

Abstract: Disclosed herein is an apparatus and method for measuring the thickness and profile of a transparent thin film using a white-light interferometer. The apparatus and method separate coherent light according to frequency, obtain a first interference pattern at each frequency, separate composite coherent light according to frequency, and obtain a second interference pattern at each frequency. Further, the apparatus and method obtain a phase, generated by the thickness of the thin film, from the first interference pattern, and acquire only information about the thickness of the thin film. Further, the apparatus and method obtain a phase from the second interference pattern, and acquires information about the profile of the thin film, including information about the thickness of the thin film. Further, by using the thin film thickness information, information about the profile of the thin film is acquired from the thin film profile information including the thin film thickness information.

Abstract: Disclosed is a method for configuring transmission antenna groups in a mobile communication system with multiple transmission antennas and multiple reception antennas. The method includes the steps of: receiving a first matrix having a size of ‘Nt×Nt’, which corresponds to Nt number of transmission antennas, fedback from the mobile terminal, generating combinations of sub-matrixes of the first matrix corresponding to Nr number of reception antennas, and calculating sums of maximum eigenvalues; determining combinations of the sub-matrixes having a maximum value from among the calculated sums of eigenvalues to be transmission antenna groups for the Nt number of transmission antennas; and transmitting different relevant symbols from each other through the transmission antenna groups.