Patent application number | Description | Published |
20080212586 | METHOD AND APPARATUS FOR CLASSIFYING PACKETS - A method and apparatus for classifying packets, e.g., at wire speed are disclosed. The method receives a packet and processes the packet through a hardware-based packet classifier having at least one evolving rule. The method then processes the packet through a software-based packet classifier if the hardware-based packet classifier is unable to classify the packet. In one embodiment, the at least one evolving rule is continuously modified in accordance with learned traffic characteristics of the received packets | 09-04-2008 |
20080259883 | Method and System for Client-Driven Channel Management in Wireless Communication Networks - A method and system for assigning channels to a plurality of access points (APs) of a wireless communication network is disclosed. The method includes obtaining first information regarding first interference experienced by a first client due to multiple APs being positioned in proximity of that client, and obtaining second information regarding second interference experienced by either the first client or a first of the APs with respect to which the first client is associated, where the second interference is due either to others of the APs that are in proximity to the first AP, or to others of the clients that are in proximity to either the first client or the first AP. Additionally, the method further includes determining channel assignments for the plurality of APs based upon each of the first and second information. | 10-23-2008 |
20090271857 | METHOD AND APPARATUS FOR FILTERING PACKETS USING AN APPROXIMATE PACKET CLASSIFICATION - A method and apparatus that enables approximate packet classification by using both an exact packet classification method and an inexact packet classification method are disclosed. For example, the method filters a plurality of packets using an exact packet classification method when a processing load is below or equal to a threshold, and filters the plurality of packets by dynamically switching between the exact packet classification method and an inexact packet classification method when the processing load is above the threshold. | 10-29-2009 |
20100067535 | Packet Router Having Improved Packet Classification - A computer-implemented method for classifying received packets using a hardware cache of evolving rules and a software cache having an original rule set. The method including receiving a packet, processing the received packet through a hardware-based packet classifier having at least one evolving rule to identify at least one cache miss packet, and processing the cache miss packet through a software based packet classifier including an original rule set. Processing the cache miss packet includes determining whether to expand at least one of the at least one evolving rules in the hardware-based packet classifier based on the cache miss packet. The determination includes determining whether an evolving rule has both the same action and lies entirely within one of the rule of the original rule set. | 03-18-2010 |
20100067546 | Method And Apparatus To Vary The Transmission Bit Rate Within Individual Wireless Packets Through Multi-Rate Packetization - A transceiver for wireless data transmission provides for variable bit rates within a packet (intra-packet rate changes) to provide a high-speed adaptation to variations in link quality useful for continuous mobility applications. Intra-packet rate variations may be obtained with standard hardware by remapping payload data to a subset of the hardware transmission constellation symbols. | 03-18-2010 |
20100080183 | System And Method For Interference Mitigation In Wireless Networks - A computer-implemented method for scheduling a packet for transmission in a wireless local area network can be used to account for hidden and/or exposed terminals. The method includes determining whether the packet is to be transmitted to a computing device through a wireless access point that is in conflict with at least one other computing device associated with a different access point. The method further includes determining whether there is a conflicting packet scheduled to be transmitted for any conflicting computing devices associated with a different access points and scheduling the packet for transmission based on any conflicting packets. The method yet further includes forwarding the packet to a wireless access point at the scheduled time. | 04-01-2010 |
20100098138 | Method And Apparatus For Improving Energy Efficiency Of Mobile Devices Through Energy Profiling Based Rate Adaptation - Improved battery life for mobile wireless devices communicating using standard network protocols is obtained by measuring an energy profile of the transmitter circuitry with respect to transmission rate and transmission energy and adjusting operating conditions according to measured or deduced error rates. Additional energy savings are obtained reducing the total number of bits transmitted using payload compression and header truncation making use of application layer communications between the remote device and a power-unconstrained proxy device. | 04-22-2010 |
20100100936 | Secure Wireless Network Using Radiometric Signatures - A network security system for wireless devices derives a fingerprint from the modulation imperfections of the analog circuitry of the wireless transceivers. These fingerprints may be compared to templates obtained when the wireless devices are initially commissioned in a secure setting and used to augment passwords or other security tools in detecting intruders on the network. | 04-22-2010 |
20110176590 | Wireless Communication System Mapping Data Bits to Symbol Bit Positions According to Error Rates of Those Bit Positions and Data Content - A transmitter-receiver pair encode data as transmitted symbols according to knowledge about variations in noise immunity between different bit positions of the symbols as a decoded. High usefulness data may be preferentially encoded at those bit positions having greatest noise immunity to improve transmission effectiveness. | 07-21-2011 |
20110176596 | Wireless Communication System Controlling Transmission Parameters of Data Units According to Data Usefulness - A wireless transmission system identifies priorities of data units and changes at least one of the physical transmission rates of the bits of the data unit, the order of transmission of the data units; and the number of retransmission attempts of the data units based on their individual priorities. | 07-21-2011 |
20140071845 | METHOD, SYSTEM AND PROGRAM PRODUCT FOR DETECTING, QUANTIFYING AND LOCALIZING OF WIRELESS INTERFERERS - A method, system and program product comprise receiving spectrum data from one or more WiFi communication devices being configured to be operable as observers of transmissions within a frequency band associated with a WiFi communication system. The spectrum data at least comprises signal levels and timing information for WiFi communication signals and non-WiFi signals observed within the frequency band. WiFi interferers are distinguished using at least the signal levels and timing information for the non-WiFi signals. A real-time interference impact on the observed WiFi communication signals for each of the distinguished WIFi interferers is determined. | 03-13-2014 |
20140169194 | Method, System and Program Product for Detecting Wireless Interferers - A method, system and program product comprise generating spectral samples from at least one radio communication device being configured to be operable as an observer of transmissions within a frequency band divided into one or more sub-bands associated with communications of the radio communication device. The spectral samples at least comprise signal levels and timing information for observed signals within the sub-bands. Spectral samples determined to be decodable communications are purged. Pulses in the spectral samples are identified. The identified pulses at least comprise a power, a center frequency and a bandwidth. A list of identified pulses for the sub-bands is maintained. At least a set of features of the identified pulses in the list is extracted. A presence of at least one radio frequency device associated with the set is detected. | 06-19-2014 |
20140269307 | Content Addressable Memory with Reduced Power Consumption - A ternary content addressable memory (TCAM) provides a pre-classifier section which analyzes a subset of received data values to forward the entire received data values only to selected portions of a TCAM likely holding that data value to substantially reduce power consumption required for classification. | 09-18-2014 |