Patent application number | Description | Published |
20110004456 | VIRTUAL NETWORK EMBEDDING METHOD IN WIRELESS TEST-BED NETWORK - Provided is a technology for providing an efficient embedding method in virtualizing a wireless test-bed network. In a virtual network embedding method in a wireless test-bed network, at least one packing point is generated in a two-dimensional strip comprised of time and frequency bandwidth, and the best virtual network slice according to the packing point is disposed. To dispose the virtual network slice, a set of packing points on the strip is collected, the suitability of the network slice according to each packing point is determined, and the network slice is disposed such that a left bottom point of the network slice is disposed at a suitable packing point. Accordingly, the length of a TDM super frame in the virtual test-bed network can be minimized. | 01-06-2011 |
20110013586 | METHOD FOR LOSSLESS HANDOVER IN VEHICULAR WIRELESS NETWORKS - A lossless handover method in vehicular wireless networks is disclosed which is capable of reducing a handover delay and reducing overhead caused by duplicate address detection (DAD) for a new Care-of-Address (CoA) by dividing a handover process into handover at road-sections and handover at intersections. In the handover method, a vehicle continues to use an original CoA configured at an original access router at road-sections even though an AR is changed, thereby reducing a handover delay. A new CoA is configured only at intersections to reduce a binding update time of a home agent which is remotely present in an external network at road-sections. When performing the DAD for a new CoA at intersections, since the vehicle performs the DAD as a background process while performing communication using an original CoA, overhead caused by the DAD can be reduced. | 01-20-2011 |
20110013608 | ACCESS POINT FOR PROVIDING WLAN VIRTUALIZATION, WLAN VIRTUALIZATION SYSTEM AND METHOD OF PROVIDING ACCESS TO WIRELESS COMMUNICATION NETWORK - The present invention relates to a WLAN virtualization system which is capable of efficiently separating a Basic Service Set (BSS) into a plurality of virtual BSSs in a Time Division Multiplexing (TDM) manner. The WLAN virtualization system includes an Access Point (AP) for providing a plurality of vBSSs, and a plurality of stations corresponding to the vBSSs provided by the AP. Each of the vBSSs is operated on a superframe basis, the superframe being scheduled by a beacon frame transmitted from the AP. The superframe includes the beacon frame, one contention-free period, and one contention period. The CPs of the vBSSs include intervals which do not overlap each other. The vBSSs can be classified into any groups designated by a service provider based on certain criteria such as physical layer, QoS, security level, or network access authority, and times can be allocated to superframes at different rates or frequencies. | 01-20-2011 |
20110093785 | APPARATUS FOR NETWORK TRAFFIC CLASSIFICATION BENCHMARK - The present invention relates to a network management system for analyzing Internet application traffic. An apparatus for Internet application traffic classification benchmark according to the present invention configures two or more Internet application traffic classifications in plug-in scheme to perform a benchmarking function for the performance of each Internet application traffic classification. The apparatus can provide an objective and accurate evaluation for each classification technology by aggregating various Internet application traffic classification technologies by the plug-in scheme. | 04-21-2011 |
20110256932 | METHOD AND SYSTEM FOR DETECTING BOT SCUM IN MASSIVE MULTIPLAYER ONLINE ROLE PLAYING GAME - Provided are a method and system for detecting a bot in a Massive Multiplayer Online Role Playing Game (MMORPG) online and in real time. By analyzing a communication pattern between a client and a server, the bot is detected based on parameters such as data length, inter-arrival time and data length auto correlation. Tests using respective parameters are combined to construct a global decision scheme, and thus more accurate detection results can be obtained. An integrated anti-bot defense system can be built by combining other tests such as a Turing test. | 10-20-2011 |
20110305148 | OPPORTUNISTIC CONCURRENT TRANSMISSION METHOD OF WIRELESS NETWORK AND WIRELESS NETWORK SYSTEM USING THE SAME - Provided is an opportunistic concurrent transmission method for achieving efficient transmission with limited wireless resources in a WLAN environment. According to an exemplary embodiment of the present invention, when a packet to be transmitted is provided in an access point in a wireless network system, information on a link which is performing transmission from another access point is acquired by overhearing transmission from another access point, a signal to interference plus noise ratio (SINR) value of the link is verified by referring an interference map, and the packet is concurrently transmitted when the verified SINR value is equal to or more than a predetermined capture threshold. | 12-15-2011 |
20110305229 | WIRELESS NETWORK SYSTEM AND ASSOCIATION CONTROL METHOD THEREOF - Provided is an association control method for maximizing a message in message (MIM) function in a WLAN environment. According to an exemplary embodiment of the present invention, when all SINR values of transmission links to two or more first clients associated with the first access point are equal to or more than a predetermined capture threshold, SINR value of a transmission link to a second client associated with the second access point is less than the capture threshold, and at least one of the first clients, referred to as a third client group, can be associated with the second access point, associations are modified so that the third client group is associated with the second access point to enable concurrent transmission. | 12-15-2011 |
20120134347 | ROUTING METHOD FOR WIRELESS MESH NETWORKS AND WIRELESS MESH NETWORK SYSTEM USING THE SAME - In the wireless mesh network including a sender, a receiver, and a plurality of access points disposed between the sender and the receiver, available transmission paths between the sender and the receiver are determined; transmission expected values are calculated for the transmission paths; and a transmission path having a minimum transmission expected value is set as an actual transmission path. The transmission expected value is a sum of expected transmission counts, which is a reciprocal of multiplication of forward transmission success rate and backward transmission success rate of a communication link between the nodes disposed on the transmission paths. When an access point can transmit a packet concurrently with another access point, the expected transmitted count is reduced by half. | 05-31-2012 |
20120218949 | DATA TRANSMISSION METHOD USING ACK TRANSMISSION OPPORTUNITY IN WIRELESS NETWORK - Disclosed is a data transmission method in a wireless network capable of improving transmission performance on a wireless network by transmitting data, on which ACK is piggybacked, using the ACK transmission opportunity having high priority. The data transmission method includes acquiring a wireless channel by a STA to transmit a first data to the AP, transmitting the first data by the STA acquired the wireless channel to the AP through the wireless channel, analyzing by the AP whether there are second data intended to any one of the plurality of STAs, and, if there are the second data to transmit, transmitting the second data, on which an ACK is piggybacked, to the intended STA from the AP using ACK transmission opportunity having higher priority than that of data transmission. | 08-30-2012 |
20130123008 | METHOD AND SYSTEM FOR DETECTING BOT SCUM IN MASSIVE MULTIPLAYER ONLINE ROLE PLAYING GAME - Provided are a method and system for detecting a bot in a Massive Multiplayer Online Role Playing Game (MMORPG) online and in real time. By analyzing a communication pattern between a client and a server, the bot is detected based on parameters such as data length, inter-arrival time and data length auto correlation. Tests using respective parameters are combined to construct a global decision scheme, and thus more accurate detection results can be obtained. An integrated anti-bot defense system can be built by combining other tests such as a Turing test. | 05-16-2013 |
20140119291 | WLAN SERVICE METHOD AND WLAN SYSTEM - Provided is a method for WLAN service performed by an access point (AP) in a WLAN system including the AP and a plurality of stations (STAs) each of which can associate with the AP, the method comprising: dividing frequency bandwidth of available channel into a plurality of frequency-selective subchannels; receiving, from at least some STAs (first STAs) among the plurality of STAs, CRQ (Contention Resolution reQuest) frame including a signature of the first STAs through at least some of the subchannels, the signature identifying the first STAs; identifying the first STAs using the received CRQ frame; estimating uplink channel quality of the first STAs using the received CRQ frame; allocating subchannels for each of the first STAs; and broadcasting result of subchannel allocation using CRP (Contention Resolution rePly) frame. | 05-01-2014 |
20140196065 | MOBILE VIDEO STREAMING ENHANCEMENT IN A NETWORK CODING-CAPABLE WIRELESS NETWORK - A method of mobile video streaming according to an exemplary embodiment of the present invention includes three parts. The first part is for AP to measure the information of all clients such as ETX (Expected Transmission count metric) and RSSI (Receive Signal Strength Indicator) periodically for long-term channel quality and mobility patterns of each client. In the second part, AP estimates the buffer status, short-term channel quality, and mobility detection of each client based on only feedback from the target client and first part result. And lastly, AP performs a practical online scheduling to select the best network code set satisfying high Peak Signal-to-Noise Ratio (PSNR), a standard metric of video quality, during a GoP (Group of Picture) at all clients based on I-frame priority. | 07-10-2014 |