Abstract: An image forming apparatus is disclosed. The image forming apparatus comprises: a storage unit which, from among a plurality of image forming apparatuses, stores information about at least one other image forming apparatus which constitutes a virtual device and an image forming apparatus; a communication unit for performing communication with the at least one other image forming apparatus; a user interface unit for displaying a UI screen including an object corresponding to the virtual device; a task processing unit; and a control unit which, when a virtual device is selected through the UI screen and a job execution command is inputted, controls the task processing unit to process at least one first task among a plurality of tasks constituting one job, requests the at least one other image forming apparatus to process at least one second task among a plurality of tasks, and distributes the job.

Abstract: Disclosed is an image forming device which can be connected to an electronic device. An image forming device comprises: a speaker; a storage unit for storing connection information necessary for connection to the image forming device; a control unit for controlling, in case of a predetermined condition, a speaker so as to output sound that corresponds to the connection information; and a wireless connection unit for, if a wireless connection request with respect to the connection information is received, connecting by means of Wi-Fi Direct to an electronic device which transmitted the wireless connection request.

Abstract: An electronic apparatus is disclosed. An electronic apparatus may include a communications interface configured to retrieve accessible access points and receive information of neighbor access points of each of the plurality of image forming apparatuses; a selector configured to select an image forming apparatus that is nearest neighbor to the electronic apparatus among the plurality of image forming apparatuses by comparing each of the received information of a plurality of neighbor access points with the retrieved access points; a printer driver configured to generate printing data for a document; and a control configured to control the communications interface to transmit the generated printing data to the selected image forming apparatus.

Abstract: A method for providing an interaction service of a user terminal device is disclosed. The method for providing an interaction service comprises the steps of: executing a video call service with a counterpart device; searching for a peripheral device to be used as a data input source with respect to the video call service; receiving video call data from at least one peripheral device among the detected peripheral devices; and transmitting the received video call data to the counterpart device.

Abstract: A mobile device is provided. The mobile device includes an imaging unit configured to generate an image, a communication interface configured to receive status information from an image forming apparatus corresponding to the generated image, a controller configured to control the communication interface to receive manual information on the image forming apparatus according to the received status information, and a display configured to synthesize and display the generated image and the received manual information.

Abstract: A mobile device is provided. The mobile device includes an imaging unit configured to generate an image, a communication interface configured to receive status information from an image forming apparatus corresponding to the generated image, a controller configured to control the communication interface to receive manual information on the image forming apparatus according to the received status information, and a display configured to synthesize and display the generated image and the received manual information.

Abstract: An electronic apparatus is disclosed. An electronic apparatus may include a communications interface configured to retrieve accessible access points and receive information of neighbor access points of each of the plurality of image forming apparatuses; a selector configured to select an image forming apparatus that is nearest neighbor to the electronic apparatus among the plurality of image forming apparatuses by comparing each of the received information of a plurality of neighbor access points with the retrieved access points; a printer driver configured to generate printing data for a document; and a control configured to control the communications interface to transmit the generated printing data to the selected image forming apparatus.

Abstract: Provided are a method of performing an event action by using a touch screen device based on operation gestures that are simultaneously input by using multiple operation tools and the touch screen device. The method includes: identifying a first operation tool based on contact by the first operation tool, the contact being sensed on the touch screen device; setting an operation area on the touch screen device based on an area designated by the contact by the first operation tool; identifying a second operation tool based on access by the second operation tool, the access being sensed on the touch screen device; sensing an operation gesture of the second operation tool within the operation area by using the second operation tool.

Abstract: Disclosed is an apparatus and method for estimating a channel capacity of an end-to-end terminal. The channel capacity estimating method of the end-to-end terminal includes calculating an average value of channel capacities for each size of data packets, the data packets varying in size, measuring an actual channel capacity with respect to the data packets, and deriving a linear model of a channel capacity based on the size of the data packets using the average value of the channel capacities and the actual channel capacity.

Abstract: A server and a terminal enabling channel capacity estimation in a High-Speed Downlink Packet Access (HSDPA) network and a method of controlling the server and the terminal are provided. More particularly, when transmitting data between both terminals in an HSDPA network, a server end may transmit a packet pair of the same size and a client end may measure a time difference between the packet pair and thereby proceed filtering. Through this, it is possible to estimate the channel capacity. Therefore, it is possible to prevent data transmission from exceeding the channel capacity in the HSDPA to thereby prevent a packet loss and to effectively use a channel.

Abstract: Provided is a handoff processing method including measuring a moving speed of a mobile terminal; measuring a size of a data packet generated in an application layer; measuring quality of a data transmission channel of the mobile terminal; calculating a maximum handoff delay time based on a relation between the moving speed and the data packet's size; estimating a handoff occurrence time point, based on a relation between a variation of the quality of the data transmission channel and the quality of the data transmission channel; and calculating a packet size and a moving speed of the mobile terminal that can minimize a delay due to a handoff occurrence by taking account of a handoff delay time according to the size of the data packet generated in the application layer and a moving speed of the mobile terminal into consideration, and providing the calculated packet size and moving speed.

Abstract: A system and method for performing a handover of a mobile station (MS) by considering Quality of Service (QoS) in a broadband mobile communication system. The method can include the steps of: receiving information about one or more neighbor base stations and reception strengths for the neighbor base stations from a Serving Radio Access System (RAS) currently communicating with the MS; extracting a value of a specific field from the received information about the neighbor base stations; combining the extracted value of the specific field with the reception strengths to thereby obtain combined values, and selecting a maximum value among the combined values; and transmitting a handover (handoff) request message to a base station corresponding to the selected maximum value. The system includes an MS that analyzes information about neighbor stations received in a Mobile Neighbor Base-station Advertisement (MOB_NBR_ADV) message to select a target RAS.

Abstract: Disclosed is a buffer controlling apparatus and method using a play time during image transmission. The buffer controlling method using the play time during the image transmission includes controlling a transmission bit rate with respect to packets to be transmitted to a reception buffer based on bit capacity with respect to packets of the reception buffer, controlling a number of transmission frames with respect to the packets to be transmitted to the reception buffer based on a play time with respect to the packets of the reception buffer, and generating the packets to be transmitted corresponding to the transmission bit rate and the number of the transmission frames, and transmitting the generated packets to the reception buffer.

Abstract: Disclosed is an apparatus and method for estimating a channel capacity of an end-to-end terminal. The channel capacity estimating method of the end-to-end terminal includes calculating an average value of channel capacities for each size of data packets, the data packets varying in size, measuring an actual channel capacity with respect to the data packets, and deriving a linear model of a channel capacity based on the size of the data packets using the average value of the channel capacities and the actual channel capacity.

Abstract: A server and a terminal enabling channel capacity estimation in a High-Speed Downlink Packet Access (HSDPA) network and a method of controlling the server and the terminal are provided. More particularly, when transmitting data between both terminals in an HSDPA network, a server end may transmit a packet pair of the same size and a client end may measure a time difference between the packet pair and thereby proceed filtering. Through this, it is possible to estimate the channel capacity. Therefore, it is possible to prevent data transmission from exceeding the channel capacity in the HSDPA to thereby prevent a packet loss and to effectively use a channel.

Abstract: Provided is a handoff processing method including measuring a moving speed of a mobile terminal; measuring a size of a data packet generated in an application layer; measuring quality of a data transmission channel of the mobile terminal; calculating a maximum handoff delay time based on a relation between the moving speed and the data packet's size; estimating a handoff occurrence time point, based on a relation between a variation of the quality of the data transmission channel and the quality of the data transmission channel; and calculating a packet size and a moving speed of the mobile terminal that can minimize a delay due to a handoff occurrence by taking account of a handoff delay time according to the size of the data packet generated in the application layer and a moving speed of the mobile terminal into consideration, and providing the calculated packet size and moving speed.

Abstract: Disclosed is a method for managing mobility of mobile nodes between heterogeneous networks in an IP-based mobile communication system including a plurality of access nodes for providing an IP service to mobile nodes located in their service areas and a neighbor graph server for supporting connection to the access nodes by the mobile nodes. The method includes classifying the access nodes according to available service level; classifying the mobile nodes according to required service level, generating service level neighbor graphs each including access nodes supporting the same service level; generating a mapping table for mapping the mobile nodes to the neighbor graphs according to service level required by the mobile node; and supporting movement of a mobile node between networks using the neighbor graph and the mapping table.

Abstract: A system and method for performing a handover of a mobile station (MS) by considering Quality of Service (QoS) in a broadband mobile communication system. The method can include the steps of: receiving information about one or more neighbor base stations and reception strengths for the neighbor base stations from a Serving Radio Access System (RAS) currently communicating with the MS; extracting a value of a specific field from the received information about the neighbor base stations; combining the extracted value of the specific field with the reception strengths to thereby obtain combined values, and selecting a maximum value among the combined values; and transmitting a handover (handoff) request message to a base station corresponding to the selected maximum value. The system includes an MS that analyzes information about neighbor stations received in a Mobile Neighbor Base-station Advertisement (MOB_NBR_ADV) message to select a target RAS.

Abstract: A method, apparatus and system for providing a video service of a video service system including multimedia video in real time to a mobile terminal connected by a wireless network. A video frame coded by a coding scheme is transmitted to the mobile terminal for decoding and display. The coding scheme may include a first coding scheme and a second coding scheme used together at a predetermined ratio according to the mobile terminal demanding the video service. A server typically receives coding scheme change determining information from the mobile terminal in order to determining whether or not to change the coding scheme for the video frame during transmission of the video frame. The changed coding scheme can be used to transmit the video frame to the mobile terminal according to the result of analyzing the coding scheme change determining information.

Abstract: Disclosed is a method for managing mobility of mobile nodes between heterogeneous networks in an IP-based mobile communication system including a plurality of access nodes for providing an IP service to mobile nodes located in their service areas and a neighbor graph server for supporting connection to the access nodes by the mobile nodes. The method includes classifying the access nodes according to available service level; classifying the mobile nodes according to required service level, generating service level neighbor graphs each including access nodes supporting the same service level; generating a mapping table for mapping the mobile nodes to the neighbor graphs according to service level required by the mobile node; and supporting movement of a mobile node between networks using the neighbor graph and the mapping table.