Patent application number | Description | Published |
20120106609 | SYSTEM AND METHOD FOR CHANNEL CLASSIFICATION - A system and method for classifying a channel with regard to delay spread in a wireless network applying orthogonal frequency division multiplexing. In one embodiment, a wireless receiver includes a channel classifier. The channel classifier is configured to compute a channel estimate corresponding to a channel traversed by a packet received by the wireless receiver. The channel classifier is also configured to partition the channel estimate into a plurality of windows. Each window corresponds to a range of time of the channel estimate. The channel classifier is further configured to assign a delay spread classification to the channel based on a distribution of energy across the windows. | 05-03-2012 |
20120106611 | PHASE LOCKING LOOP - A phase-locking loop (PLL) for use with orthogonal frequency division multiplexed signals. In one embodiment, a wireless receiver includes a PLL is configured to reduce phase and frequency divergence between the wireless receiver and a transmitter of a packet received by the wireless receiver. The PLL includes a loop bandwidth controller. The loop bandwidth controller is configured to set a bandwidth of the PLL to a first value for reception of an initial symbol of the packet. The loop bandwidth controller is configured to reduce the bandwidth of the PLL over a number of symbols preceding an initial header of the packet. | 05-03-2012 |
20120106614 | SYSTEM AND METHOD FOR CHANNEL INTERPOLATION - A system and method for channel interpolation in a wireless device. In one embodiment a wireless device includes a channel estimator. The channel estimator is configured to generate estimated channel coefficients for a wireless channel over which the wireless device receives a packet. The channel estimator includes an interpolation filter. The interpolation filter is configured to provide interpolated channel coefficients for a plurality of non-pilot sub-carriers. The interpolated channel coefficients are based on pilot sub-carriers of non-preamble symbols. | 05-03-2012 |
20120163497 | CHANNEL ESTIMATION BASED ON LONG TRAINING SYMBOL WITH DOUBLED CYCLIC PREFIX - In at least some embodiments, a receiver includes channel estimation logic configured to a process a long training field symbol having a doubled cyclic prefix. The channel estimation logic is configured to vary an amount of the doubled cyclic prefix used for channel estimation. Further, in some embodiments, a wireless communication device includes logic to enable communications based on at least two long training field symbols having a doubled cyclic prefix as part of a synchronization header. Further, in some embodiments, a method includes receiving a long training field symbol having a synchronization header with a doubled cyclic prefix and varying an amount of the doubled cyclic prefix used for channel estimation. | 06-28-2012 |
20130114491 | Medium Access Control Enhancements - The exemplary embodiments enable setting one or more devices of a wireless communication network to be associated with a one or more groups of a plurality of groups based on at least a device type of the one or more devices, receiving at least one indication that one or more devices have data to send, and allocating, one group at a time, resources to the groups associated with the devices with data to send. Further, receiving a probe message from a network node, the probe message identifying one or more groups set to the device based at least on a device type, sending, information to the node, the information providing an indication that data is required to be sent, and in response to the sending, receiving a resource allocation from the node to send the data, wherein the resource allocation is arranged based on the groups set to the device. | 05-09-2013 |
20130136066 | Medium Access Control Method Enhancement - The exemplary embodiments provide at least a method of receiving, by a node of a wireless communication network, more than one indication of data required to be sent from devices in the network, determining that provisioning resources to send the data in response to each of the more than one indication exceeds at least one threshold, and based on the determining, sending a probe message including a priority constraint to the devices. Further, receiving, at a device of a wireless communication network, a probe message from a network node of the network, the probe message identifying a priority constraint, sending, by the device, an acknowledgement to the probe message, the acknowledgment indicating that the device has data to send which meets or exceeds the priority constraint identified in the probe message, and in response to the acknowledgment, receiving from the network node a resource allocation to send the data. | 05-30-2013 |
20130223305 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR POWER SAVING IN WIRELESS COMMUNICATION - Method, apparatus, and computer program product embodiments are. An example embodiment comprises: transmitting by a first wireless device to a second wireless device, a first message indicating an awake state with availability to receive wireless messages from the second wireless device; receiving by the first wireless device, an acknowledgement message from the second wireless device, including control information indicating a duration until a service period starts; and resuming a non-awake state by the first device when the control information indicates the duration satisfies a transition criterion. | 08-29-2013 |
20130223306 | Buffered Frames Indication Enhancement To Enable Power Savings - A method includes receiving, by an apparatus, a signaling element containing an indication whether there are buffered individually addressed frames for at least one device within a group of devices; determining, by the apparatus, whether the apparatus belongs to a group for which there are no buffered individually addressed frames, based on the indication; and if the apparatus belongs to a group for which there are no buffered individually addressed frames, entering a lower power state without waiting to receive a next signaling element. | 08-29-2013 |
20130223419 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR POWER SAVING ENHANCEMENTS IN WIRELESS COMMUNICATION - Method, apparatus, and computer program product embodiments enable power saving in network environments. An example embodiment comprises: transmitting by a first wireless device to a second wireless device, a first message indicating an awake state with availability to receive wireless messages from the second wireless device, the first message including a threshold value for acceptance by the first device of buffered data in the second device; and receiving by the first wireless device, an immediate acknowledgement message from the second wireless device, if the buffered data in the second device satisfies the threshold value or receiving by the first wireless device, a delayed acknowledgement message from the second wireless device, if the buffered data in the second device does not satisfy the threshold value. | 08-29-2013 |
20130229309 | BEAM ALIGNMENT METHOD UTILIZING OMNI-DIRECTIONAL SOUNDING AND USE THEREOF - A method includes transmitting a training signal from each of N omni-directional beams corresponding to N entries in an omni-directional codebook, receiving feedback including indication(s) corresponding to an entry from a narrow beam codebook entry to use to transmit, determining, based on the indication(s), the entry from a narrow beam codebook entry to use to transmit, and transmitting a data signal using the entry from the narrow beam codebook. Another method includes receiving at a receiver a training signal including N omni-directional beams corresponding to N entries in an omni-directional codebook, determining a best entry from a narrow beam codebook to use by a transmitter in transmissions to the receiver, where the best entry is determined as a function of the received training signal including the N omni-directional beams, and transmitting to the transmitter indication(s) corresponding to the best entry of the narrow beam codebook. | 09-05-2013 |
20130229959 | METHOD AND APPARATUS FOR GROUP SYNCHRONIZED CHANNEL ACCESS WITH TIM SEGMENTATION - A method includes receiving indications of a wake-up interval assigned to a station and a corresponding group to which the station belongs, wherein all stations assigned to the group are assigned the wake-up interval. The method includes waking the station during the wake-up interval and determining, using at least the indication of the group, whether information received by the station during the wake-up interval corresponds to the group. Another method includes assigning stations to one of multiple groups based on wake-up intervals, in which stations assigned to a group all have a same wake-up interval and each group has a different wake-up interval, sending indications of a corresponding wake-up interval and a corresponding group to each of the stations, and during a interval corresponding to the wake-up interval for a selected group, transmitting the indication of the selected group and associated information meant for the group. | 09-05-2013 |
20130294261 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR EFFICIENT TIM COMPRESSION AND DECODING - Method, apparatus, and computer program product embodiments improve power saving in network environments. An example method embodiment comprises: generating in an access point device, a traffic indication map comprising a page bitmap field, a page control field, one or more block bitmap fields, and one or more sub-block bitmaps indicating wireless client devices having buffered data in the access point device available for them; and periodically broadcasting the traffic indication map in a beacon frame to the wireless client devices. | 11-07-2013 |
20130294427 | Method And Apparatus For Signaling Sequence Root - A first access node of a first network utilizes code sequences, assigned to different user devices, to distinguish at least acknowledgements received in parallel or sequentially from those user devices. The first access node determines from received signaling that a root sequence of the code sequences is in use by a second access node of a second network, then changes that root sequence of the code sequences assigned to the different user devices. In certain examples the access nodes are WLAN access points APs and the acknowledgements are received in response to a group probe/poll. In various embodiments the first AP monitors its neighbors' group probes/polls to learn the root sequences/basic service sets in use in those neighbor networks, or the AP's own stations monitor and send the information in neighbor reports. This latter option can be initiated by the stations themselves, or by the AP. | 11-07-2013 |
20130301605 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR RESOURCE ALLOCATION FOR SEQUENTIAL/PARALLEL WIRELESS MESSAGES - Method, apparatus, and computer program product embodiments provide signaling mechanisms for wireless networks composed of a large number of stations. An example method embodiment comprises: receiving by a wireless client device, a first message from an access point device, the first message comprising information related to resource allocation that at least partly indicates a resource allocation in time-frequency space for the wireless client device; decoding by the wireless client device, the information related to resource allocation, using a connection identifier that identifies the wireless client device within a wireless network managed by the access point device, to obtain the resource allocation in time-frequency space; and transmitting by the wireless client device to the access point device, a second message using the resource allocation in time-frequency space. | 11-14-2013 |
20130336234 | Medium Access Control Method - The exemplary embodiments of the invention relate to at least a method including receiving an indication that a first resource allocation to a device to transmit data was insufficient and there is remaining data to transmit by the device, based at least on information associated with the first resource allocation, determining a second resource allocation for the device, and sending the second resource allocation to the device in order to enable the device to transmit the remaining data. Further, there is a method including sending an indication that a first resource allocation to a device to transmit data was insufficient and there is remaining data to transmit, and in response to the sending, receiving a second resource allocation to the device to enable the device to transmit remaining data, wherein the second resource allocation is based at least on information associated with the first resource allocation. | 12-19-2013 |
20140003414 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR RESOLVING HIDDEN NODE IN SYNCHRONIZED DCF BASED CHANNEL ACCESS | 01-02-2014 |
20150124706 | Method and Apparatus for Signaling Sequence Root - A first access node of a first network utilizes code sequences, assigned to different user devices, to distinguish at least acknowledgements received in parallel or sequentially from those user devices. The first access node determines from received signaling that a root sequence of the code sequences is in use by a second access node of a second network, then changes that root sequence of the code sequences assigned to the different user devices. In certain examples the access nodes are WLAN access points APs and the acknowledgements are received in response to a group probe/poll. In various embodiments the first AP monitors its neighbors' group probes/polls to learn the root sequences/basic service sets in use in those neighbor networks, or the AP's own stations monitor and send the information in neighbor reports. This latter option can be initiated by the stations themselves, or by the AP. | 05-07-2015 |
Patent application number | Description | Published |
20090019546 | Method and Apparatus for Modeling Computer Program Behaviour for Behavioural Detection of Malicious Program - A method and apparatus for modeling a behavior of a computer program that is executed in a computer system is described. The method and apparatus for modeling a behavior of a computer program may be used to detect a malicious program based on the behavior of the computer program. A method includes collecting system use information about resources of the computer system the computer program uses; extracting a behavior signature of the computer program from the collected system use information; and encoding the extracted behavior signature to generate a behavior vector. As a result, behaviors of a particular computer program may be modeled to enable a malicious program detection program and to determine whether the computer program is either normal or malicious. | 01-15-2009 |
20090031162 | APPARATUS AND METHOD FOR REPAIRING COMPUTER SYSTEM INFECTED BY MALWARE - An apparatus and method of diagnosing whether a program executed in a computer system is malware and repairing the computer system infected by malware. The apparatus includes a receiving unit which receives a first behavior vector for the malware from a malware control server; a determination unit which determines whether a diagnostic target program corresponds to malware based on the received first behavior vector and a second behavior vector for the diagnostic target program; and a repair unit which repairs the computer system based on a result of the determination. | 01-29-2009 |
20090049549 | APPARATUS AND METHOD FOR DETECTION OF MALICIOUS PROGRAM USING PROGRAM BEHAVIOR - An apparatus and method of diagnosing whether a computer program executed in a computer system is a malicious program and more particularly, an apparatus and method of diagnosing whether a computer program is a malicious program using a behavior of a computer program, and an apparatus and method of generating malicious code diagnostic data is provided. The apparatus for diagnosing a malicious code may include a behavior vector generation unit which generates a first behavior vector based on a behavior signature extracted from a diagnostic target program; a diagnostic data storage unit which stores a plurality of second behavior vectors for a plurality of sample programs predetermined to be malicious or normal; and a code diagnostic unit which diagnoses whether the diagnostic target program is a malicious code by comparing the first behavior vector with the plurality of second behavior vectors. | 02-19-2009 |
20090064328 | SYSTEM, APPARATUS AND METHOD OF MALWARE DIAGNOSIS MECHANISM BASED ON IMMUNIZATION DATABASE - An immunization system including: an immunization client apparatus which determines whether a target code is a malicious code by performing an immunization operation with respect to a first immunization signature and a code signature that is extracted from the target code and reports the result of the determination to an immunization server; and the immunization server which diagnoses whether the target code is the malicious code, updates a second immunization signature based on the reported result of the determination, and transmits to the immunization client apparatus an update message about the updated second immunization signature, wherein the immunization client apparatus updates the first immunization signature based on the received update message is provided. | 03-05-2009 |
20090157249 | SECTION OVERSPEED WARNING APPARATUS AND SYSTEM - In a section overspeed regulating method of determining whether a vehicle overspeeds on the basis of whether an average speed of the vehicle in a regulation section exceeds a speed limit, the section overspeed warning apparatus and system determine whether the current speed of the vehicle traveling on a regulation section exceeds the speed limit, and warn a driver. Whether the speed of the vehicle traveling on the regulation section exceeds the speed limit of the section is determined depending on a travel distance from a starting position of the regulation section to a current position of the vehicle, a travel time taken for the vehicle to travel by the travel distance, and a remaining distance from the current position of the vehicle to an end position of the regulation section. If it is determined that the current position of the vehicle will exceed the speed limit of the section, overspeed warning messages are output in the form of text, voice, or warning sound. Further, the section overspeed warning apparatus and system recommend the maximum speed, which allows the vehicle not to violate the speed limit of the section at the current position, to a driver as a recommended speed. | 06-18-2009 |