Abstract: The invention concerns a method for optimizing antenna pattern assignment for a first wireless communication device forming a wireless network with at least one second wireless communication device, each of said communication device being equipped with a multi-sector antenna, an antenna pattern being a combination of said antenna sectors, said communication devices being adapted for sending a request and for receiving a response using a current antenna pattern assignment, said method comprising a step of: evaluating by said first communication device a first value; sending by said first communication device to said second communication device a broadcast request comprising said value receiving by said first communication device, a response to said broadcast request, said response being sent by said second communication device, said response depending on a second value evaluated by said second device; Switching or not, by said first communication device, to a new antenna sector assignment depending on said

Abstract: The invention concerns a method for measuring channel state information of multiple transmission/reception modes in a wireless network comprising a plurality of nodes, said modes being defined by frequency channels and/or antenna patterns, said wireless network comprising a MAC (Media Access Control) layer and every node comprising at least one MAC queue, comprising the steps of:periodically sending broadcast probe packets by at least one node called transmitter node, using a pre-determined and globally known period and predetermined sequence of transmission modes, each of said probe packets containing the transmission mode used for its transmission a sequence number of the transmission mode in the pre-determined sequence of transmission modes and a timestamp value containing the time said broadcast probe packet was buffered at the MAC queue of the transmitter node; measuring, by at least one second node called receiving node receiving a broadcast probe packet , channel state information of a transmission/rec

Abstract: The invention concerns a method for optimizing antenna pattern assignment for a first wireless communication device forming a wireless network with at least one second wireless communication device, each of said communication device being equipped with a multi-sector antenna, an antenna pattern being a combination of said antenna sectors, said communication devices being adapted for sending a request and for receiving a response using a current antenna pattern assignment, said method comprising a step of: evaluating by said first communication device a first value; sending by said first communication device to said second communication device a broadcast request comprising said value receiving by said first communication device, a response to said broadcast request, said response being sent by said second communication device, said response depending on a second value w evaluated by said second device; Switching or not, by said first communication device, to a new antenna sector assignment depending on sai

Abstract: The invention concerns a method for measuring channel state information of multiple transmission/reception modes in a wireless network comprising a plurality of nodes, said modes being defined by frequency channels and/or antenna patterns, said wireless network comprising a MAC (Media Access Control) layer and every node comprising at least one MAC queue, comprising the steps of: periodically sending broadcast probe packets by at least one node called transmitter node, using a pre-determined and globally known period and predetermined sequence of transmission modes, each of said probe packets containing the transmission mode used for its transmission a sequence number of the transmission mode in the pre-determined sequence of transmission modes and a timestamp value containing the time said broadcast probe packet was buffered at the MAC queue of the transmitter node; measuring, by at least one second node called receiving node receiving a broadcast probe packet, channel state information of a transmission/rec

Abstract: An apparatus for optimizing a filter based on detected attacks on a data network includes an estimation means and an optimization means. The estimation means operates when a detector detects an attack and the detector transmits an inaccurate attack severity. The estimation means determines an accurate attack severity. The optimization means adjusts a parameter and the parameter is an input to a filter.

Abstract: An apparatus for optimizing a filter based on detected attacks on a data network includes an estimation means and an optimization means. The estimation means operates when a detector detects an attack and the detector transmits an inaccurate attack severity. The estimation means determines an accurate attack severity. The optimization means adjusts a parameter and the parameter is an input to a filter.

Abstract: A method of regulating queuing delay in a network routing device independent of TCP loading is provided including receiving data packets, monitoring the data packets using token buckets and a Proportional and Integral (P+I) Active Queue Management (AQM) scheme, marking selected data packets falling within a profile, and adjusting flow preference of the monitored packets.

Abstract: A method of multicasting video to multiple client nodes via intermediate nodes that includes accessing video information descriptive of the video to be multicast, accessing information describing a distribution tree of nodes from a source of the video to the multiple clients nodes via one or more internetwork nodes, accessing rate constraints of nodes in the distribution tree, accessing buffer allocations of the nodes in the distribution tree, and determining one or more smoothed transmission schedules for each node in the distribution tree based on the accessed video information, the accessed information describing the distribution tree, the accessed rate constraints of nodes in the distribution tree, and the accessed buffer allocations of the nodes in the distribution tree, the one or more transmission schedules describing the transmission of video data to one or more children nodes.

Abstract: Provided herein is a linear programming-based algorithm to estimate the clock skew in network delay measurements based on one-way delay measurements. The algorithm has the time complexity of O(N), leaves the delay after the skew removal positive, and is robust in the sense that the error margin of the skew estimate is independent of the magnitude of the skew. The algorithm is understood to be unbiased, and the sample variance of the skew estimates is small.

Abstract: A method of regulating queuing delay in a network routing device independent of TCP loading is provided including receiving data packets, monitoring the data packets using token buckets and a Proportional and Integral (P+I) Active Queue Management (AQM) scheme, marking selected data packets falling within a profile, and adjusting flow preference of the monitored packets.