Abstract:
A connector assembly includes a USB socket and a USB connector. The USB socket includes a housing and at least one engaging protrusion protruding from an inner surface of the housing. The USB connector includes a holding portion; a header adapted to be plugged into the USB socket which extends from a first end of the holding portion along a first direction; and a plurality of cables, extending from a second end of the holding portion along a second direction substantially perpendicular to the first direction. At least one groove is defined in the header for receiving the at least one engaging protrusion and preventing the header from accidentally disengaging from the USB socket.
Abstract:
A method for multi-service provisioning in an OFDMA-PON that includes linking communicatively to a core network and bandwidth provisioning, dynamically within a single wavelength, traffic from the core network to a network of multiple virtual passive optical networks VPONs for multi-service provisioning to the VPONs.
Abstract:
An energy efficient OFDM transceiver includes a transmitter using a decision processor to control first internal elements that can be operated in parallel and can be selectively powered off or hibernated, and a receiver using a processing decision element to control second internal elements that can be operated in parallel and can be selectively powered off or hibernated, wherein control of the first and second internal elements enables tracking status of network traffic, adjustment of OFDM bandwidth based on a traffic decision and selectively powering off or hibernating parallel ones of the first and second internal elements.
Abstract:
A method for identifying an unknown user according to a plurality of facets of user activity in a plurality of contexts includes receiving a plurality of priors for the facets with respect to the contexts, receiving a plurality of footprints of known users, aggregating the footprints of the users to determine an ensemble prior, receiving a plurality of network traces relevant to an unknown user in a computer environment, matching the network traces against each of the footprints to determine a plurality of matches, aggregating the matches using the ensemble prior according to the facets and the contexts, and outputting a probable user identity for the unknown user.
Abstract:
Methods and systems for optical signal grooming that include providing one or more input signals, each having one or more modulated subcarriers, to a grooming processor; and grooming the input signals at a subcarrier level with the grooming processor to produce one or more output signals by arranging the modulated subcarriers in the output signals according to a grooming operation such that the modulated subcarriers are not demodulated or decoded prior to grooming.
Abstract:
Methods for determining cyber-attack targets include collecting and storing network event information from sensors to extract information regarding an attacker; forming an attack scenario tree that encodes network topology and vulnerability information including paths from known compromised nodes to a set of potential targets; calculating a likelihood for each of the paths using a processor; calculating a probability distribution for the set of potential targets to determine which potential targets are most likely pursued by the attacker; calculating a probability distribution over a set of nodes and node vulnerability types already accessed by the attacker; determining a network graph edge to remove which minimizes a defender's expected uncertainty over the potential targets; and removing the determined network graph edge.
Abstract:
Methods and systems for transmitting and receiving data include reverse concatenated encoding and decoding. Reverse concatenated decoding includes inner decoding the encoded stream with an inner decoder that uses a low-complexity linear-block code to produce an inner-decoder output stream, outer decoding the inner-decoder output stream with an outer decoder that uses a low-density parity-check code to produce an information stream, and iterating extrinsic bit reliabilities from the outer decoding for use in subsequent inner decoding to improve decoding performance.
Abstract:
Methods and systems for reduced-complexity decoding of low-density parity-check (LDPC) information. An encoded input stream is received. The received stream is decoded with one or more reduced-complexity min-sum or a posteriori probability LDPC decoders. A v-node update rule in the reduced complexity decoder is omitted.
Abstract:
Systems and methods are disclosed for communicating data in an integrated sensor network having one or more nodes coupled to an optical sensor network and a radio frequency wireless sensor network, each node having an optical link and a wireless link. The method includes determining a transmission path having one or more hybrid hops for packet transmission over the optical sensor network and the radio frequency wireless sensor network, each hybrid hop including optical and wireless links between two neighboring nodes; and selecting a set of optical and wireless links for the optical sensor network and the radio frequency wireless sensor network to minimize contiguous wireless links.
Abstract:
A method of encoding for optical transmission of information includes encoding information with a generalized low-density parity-check (GLDPC) code for providing coding gains, and constructing the GLDPC code with a Reed-Muller RM code as a component code, the component code being decodable using a maximum posterior probability (MAP) decoding. In a preferred embodiment, the GLDPC code includes a codeword length of substantially 4096, an information word length of substantially 3201, a lower-bound on minimum distance of substantially greater than or equal to 16, a code rate of substantially 0.78 and the RM component code includes an order of substantially 4 and an r parameter of substantially 6.