Patent application number | Description | Published |
20080313637 | PREDICTION-BASED DYNAMIC THREAD POOL MANAGEMENT METHOD AND AGENT PLATFORM USING THE SAME - The present invention relates to a prediction-based dynamic thread pool management method and an agent platform using the same. An prediction-based dynamic thread pool management method according to the present invention includes: (a) calculating a thread variation to a variation of the number of threads at a time t | 12-18-2008 |
20100061557 | SYSTEM AND METHOD FOR EFFECTIVELY PRE-DISTRIBUTING KEY FOR DISTRIBUTED SENSOR NETWORK - A system for effectively pre-distributing keys for a distributed sensor network is disclosed, The system includes: a plurality of sensor nodes, each of which has a sensing function, a calculation function, and a wireless communication function; and a base station which is connected to the sensor nodes over a wireless network, receives data from the sensor nodes, acts as a data central station, and distributes keys for inter-sensornode security authentication to the sensor nodes. A key management unit contained in the base station, generates a set of the sensor nodes used for security authentication between the sensor nodes, decomposes the set of the sensor nodes into a plurality of matrices, distributes the matrices to the sensor nodes, and allows the sensor nodes to search for a common private key required for the security authentication using the received matrices. Therefore, the system can always search for a common private key between the sensor nodes. | 03-11-2010 |
20100232383 | METHOD AND APPARATUS FOR ALLOCATING CHANNEL BANDWIDTH IN WIRELESS INTERNET PROTOCOL TELEVISION SYSTEMS - A method and apparatus for allocating channel bandwidths in a wireless IPTV system is provided. The method includes measuring, if an additional service offering request is received in a saturation channel state, remaining execution times until a service of each terminal that is currently receiving a service is terminated, and setting a minimum of the measured remaining execution times to a unit time; calculating a securable channel bandwidth per the unit time with respect to each terminal that is currently receiving a service; and allocating, if the summation of the securable channel bandwidths per the unit time is equal to or greater than a channel bandwidth required to provide the additional service, the requested channel bandwidth in order to provide the additional service. | 09-16-2010 |
20100251296 | CHANNEL SWITCHING METHOD AND SYSTEM FOR IPTV SERVICE - A channel switching method and system for IPTV for reducing channel switching delay and improving bandwidth utilization efficiency is provided. The channel switching method includes pre-joining candidate channels while playing broadcast data on a main channel, the candidate channels being stored in a candidate channel table; releasing the pre-joined candidate channels, when a channel holding time of the main channel is greater than a predetermined channel holding time level; and re-joining the released candidate channels before a completion of playing the broadcast data on the main channel. | 09-30-2010 |
20110206012 | HANDOVER METHOD AND APPARATUS FOR PROVIDING MOBILE IPTV SERVICE OVER HETEROGENEOUS WIRELESS COMMUNICATION NETWORKS - Disclosed herein is a handover method and apparatus for providing mobile Internet Protocol Television (IPTV) service over wireless communication networks. The handover method includes checking whether the strength of a signal received from a first base station of a serving first wireless network falls within a predetermined first threshold range; if the strength of the signal falls within the range, checking whether the strength of a signal received from at least one base station of a second wireless network is higher than a second threshold value required for handover; estimating the velocity and direction of a Mobile Node (MN) using location information received from a satellite; predicting a handover target base station using the estimated velocity and estimated location information; and, if the predicted target base station is one of base stations having the second threshold value, performing handover to the target base station. | 08-25-2011 |
20110243013 | METHOD AND APPARATUS FOR CHANNEL SCANNING IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus perform channel scanning in a wireless communication system. A signal intensity of an Access Point (AP) is compared with a scanning threshold, when the AP signal intensity not less than the scanning threshold, a channel scanning schedule list is generated in consideration of a scan time based on a passive channel scan scheme and a scan time based on an active channel scan scheme. The channel scanning is performed every channel scanning time, according to the channel scanning schedule list. | 10-06-2011 |
20110258670 | METHOD AND APPARATUS FOR VIDEO TRANSMISSION IN COMMUNICATION SYSTEM FOR SUPPORTING INTERNET PROTOCOL TELEVISION SERVICE BETWEEN HETEROGENEOUS NETWORKS - An apparatus and method provide effective video transmission in a communication system that supports an Internet Protocol Television (IPTV) service between heterogeneous networks. A request for a contiguous service is received from a terminal during a mid-point of a video stream. A delay time that may be generated when the video contents are transmitted is estimated for each of a patching type and a fast broadcasting type. A transmission type with a shorter delay time for the video contents is determined based on the estimated delay time for each of the patching type and the fast broadcasting type. And the video contents are transmitted to the terminal by applying the determined transmission type. | 10-20-2011 |
20130196660 | METHOD FOR HANDOVER OF MOBILE TERMINAL - Disclosed herein is a method for handover of a mobile terminal. In the method, a group of mobile terminals for handover is formed by grouping a plurality of mobile terminals. A first terminal of the group scans a target base station. One or more other terminals of the group perform handover to the target base station using the scan information of the first terminal. | 08-01-2013 |