Abstract:
In a radio using a plurality of channels defined in a radio frequency (RF) spectrum, a rate of false packet detections may be calculated for each of the plurality of channels using a plurality of respective correlation thresholds. The rate of false packet detections for each channel may be compared to a range of acceptable rates of false packet detections. The same or different ranges of acceptable rates of false packet detections may be used for each channel or each channel plan. Different correlation thresholds may be adjusted based at least in part on the comparisons. For example, if a rate of false packet detections exceeds a range of acceptable rates of false packet detections, the correlation threshold may be raised, or the reverse. A packet may be detected on different channels based on different adjusted correlation thresholds.
Abstract:
A physical-layer cross connect (PLCC) includes a system-bus interface; a switching circuit having externally accessible data ports, an internal-only PLCC-controller port, and a data bus dynamically configurable among the data ports and the PLCC-controller port; transceivers connected to the data ports and to a signal bus; data jacks connected to the transceivers; and a PLCC controller interfaced with the system-bus interface, the data bus, the signal bus, and the PLCC-controller port and configured to: receive path-configuration commands from a management controller and responsively configure connections on the data bus; receive mirrored copies of inbound data by selectively configuring connections on the data bus between the PLCC-controller port and the various data ports; analyze the mirrored copies to determine informational characteristic(s); and report the characteristic(s) to the management controller.
Abstract:
A plurality of first packets (201) of at least partially different lengths (601) are aggregated into a sequence of subframes (203) of a second packet (202). The second packet (202) is transmitted via a radio channel.
Abstract:
Es wird ein Verfahren zur drahtlosen Übertragung von Audiosignalen basierend auf dem Bluetooth-Protokoll von einer Bluetooth-Audioquelle an ein Computergerät (Audiosenke) vorgesehen. Ein Audiosignal wird in der Bluetooth-Audioquelle in Audiodatenpakete umgewandelt. Die Audiodatenpakete werden basierend auf einem Protokoll mit Zugriff auf die L2CAP Schicht zum Beispiel dem Radio Frequency Communication Protokoll (RFCOMM) in L2CAP-Datenpakete in der Bluetooth Audioquelle umgewandelt und drahtlos gesendet. Die Bluetooth-Audioquelle unterdrückt eine erneute Übertragung von fehlerhaften oder nicht durch die Senke empfangenen L2CAP-Datenpaketen oder reduziert die erneute Übertragung auf ein vorgegebenes Maß, welches durch die maximal zulässige Latenz begrenzt ist. Somit kann eine schritthaltende Übertragung bzw. Wiedergabe des Audiostreams bzw. des Audiosignals erfolgen. Gemäß der Erfindung wird ferner eine Übertragung eines Audiostreams bzw. eines Audiosignals auf der L2CAP Schicht mit einer reduzierten Wiederholungsrate bei fehlerhaften Datenpaketen vorgesehen. Durch das erfindungsgemäße Verfahren kann von der Anwendungsschicht ein Zugriff auf RFCONM oder ein anderes Datentransportprotokoll mit Zugriff auf die L2CAP Schicht vorgesehen sein.
Abstract:
Disclosed are a system and a method for detecting a malicious code using visualization in order to allow a user to intuitively detect behavior of client terminals infected with a malicious code. The system for detecting a malicious code using visualization comprises: a data collection module which collects DNS packets; a parameter extraction module which extracts parameters for visualization from the collected DNS packets; a data loading module which loads the extracted parameters; a blacklist management module which manages blacklist domains; a filter module which filters unnecessary data from the loaded data; and a visualization generation module which generates visualization patterns using the extracted parameters.
Abstract:
The present invention relates to a method and apparatus for controlling a handshake operation. Datagram Transport Layer Security (DTLS) is an important secure protocol in the IP based Internet of things. The performance of DTLS handshake can be significantly affected by network status, traffic and packet loss rate, etc. It is therefore suggested evaluating a package loss rate and estimating causes of packet loss. Then, a DTLS handshake strategy may be changed adaptively based on the detection of packet loss and network status. As a result, the successful rate and delay of DTLS handshake can be improved. An acknowledgement and a non-acknowledgement mode may be used in a hybrid way to evaluate the package loss rate and estimate causes of packet loss and eventually improve performance of DTLS handshake.
Abstract:
A method and system are provided for determining modulation control information and a reference signal design to be used by a transmitter node when generating a transmit signal to transmit from a transmitter(logical antenna)of the transmitter node over a channel of a wireless link to a recipient node. The modulation control information is used by the transmitter node to convert source data into an information bearing signal, and the information bearing signal is combined with a reference signal conforming to the reference signal design in order to produce the transmit signal. The method comprises (a) selecting a candidate reference signal design from a plurality of candidate reference signal designs, (b) determining channel state information for the channel, (c) determining, from the channel state information, signal to noise ratio information for said channel, and (d) for each of a plurality of candidate modulation control information, using the signal to noise ratio information to determine a quality indication for said channel. Steps (a) to (d) are then repeated for each candidate reference signal design in said plurality. Thereafter a winning quality indication is selected from the determined quality indications, and the combination of candidate reference signal design and candidate modulation control information associated with the winning quality indication is then output to the transmitting node.By such an approach, quality indications can be established for each combination of possible reference signal design and possible modulation control information, and hence not only is the inherent channel estimation accuracy achievable using each possible reference signal design considered, but also the data transmission efficiency and robustness to channel effects of each possible modulation control information is also taken into account.