Abstract: An optical WDM system configured to use direct detection of communication signals that is compatible with electronic CD compensation on a per-channel basis. In an example embodiment, to enable full (e.g., amplitude and phase) electric-field reconstruction at the receiver, the optical WDM system uses a carrier-frequency plan according to which the carrier-frequency comb used at one end of the WDM link and the carrier-frequency comb used at the other end of the WDM link are offset with respect to one another by one half of the bandwidth of an individual WDM component transmitted therethrough. This frequency offset places each local carrier frequency at a roll-off edge of the corresponding incoming data-modulated signal. As a result, the corresponding combined optical signal beneficially lends itself to direct detection that can be followed by full electric-field reconstruction using a known self-coherent Kramers-Kronig method and then by conventional electronic CD compensation.

Abstract: A modular optical device having a set of optoelectronic modules that enables the device to operate, e.g., as a WDM or multichannel transceiver. In an example embodiment, the set of optoelectronic modules includes a laser module, a modulator module, and an optical-to-electrical converter module, all mounted on the same circuit board and optically and electrically connected for the intended application. Each of the optoelectronic modules comprises a respective stack of integrated circuits, at least one of which is a photonic integrated circuit (PIC). Some of the PICs may be configurable for different applications, with the configuration setup being carried out using electrical control signals and/or optical connections of the PICs.

Abstract: Various exemplary embodiments relate to an apparatus including: a first substrate including a planar dielectric layer on a semiconducting layer, and a silicon layer located directly on a planar surface of the dielectric layer, adjacent first and second segments of the silicon layer being optically end-coupled, the first segment being thicker than the second segment; and a second substrate including a III-V semiconductor layer segment on a top surface thereof, the first and second substrates being bonded together such that the III-V semiconductor layer segment is in direct contact with a portion of the first segment of the silicon layer.

Abstract: An article comprises an elastic membrane having a mass element provided thereon the mass element having an asymmetric shape and a resonator structure having a resonance frequency. The elastic membrane is configured to oscillate in response to a sound wave incident thereon, and the asymmetry of the mass element is configured to induce a flapping motion which in combination with the oscillation of the membrane trap vibrational mechanical energy from the sound wave and the resonator structure is configured to absorb at least a part of the incident sound wave. A composite material comprising the article is also disclosed.

Abstract: A photonic integrated circuit (PIC) having two tapered planar waveguide cores that are separated from one another by a relatively narrow gap, with each of these waveguide cores having a respective portion thereof located on a tapered planar slab core. The relative positions of the slab core and the two waveguide cores are such that the light crossing between the two waveguide cores undergoes a polarization rotation between the TM and TE polarizations with a relatively low insertion loss. The corresponding waveguide structure can be used as a relative polarization-rotating splitter for light propagating in one direction or as a relative polarization-rotating combiner for light propagating in the opposite direction. At least some embodiments of the disclosed PIC can advantageously be fabricated using a complementary metal oxide semiconductor technology and/or a conventional silicon-on-insulator platform.

Abstract: A system, apparatus, method, and non-transitory computer readable medium for providing transfer block indications in uplink (UL) grant-free transmissions may include a memory having computer readable instructions stored thereon, and at least one processor configured to execute the computer readable instructions to transmit a first transport block (TB) to a base station (BS) during a first transmission time interval (TTI) using a grant-free UL transmission, receive a UL grant from the BS in a physical downlink control channel (PDCCH) region during a time window, determine a target of the UL grant, the target including at least one of the first TB, a second TB, or a previously transmitted TB, based on the UL grant, and transmitting the target of the UL grant to the BS.

Abstract: A WDM receiver configured to apply electronic equalization processing to both dispersion-compensated and dispersion-distorted versions of the received communication signal. In an example embodiment, the receiver's DSP first generates an equalized dispersion-compensated signal corresponding to the communication signal. The DSP then performs electronic dispersion-application processing on the equalized dispersion-compensated signal to generate a dispersion-distorted version thereof. The DSP then applies decision-aided electronic equalization processing to the dispersion-distorted version of the signal, subjects the resulting equalized signal to another round of dispersion-compensation processing, and recovers the data encoded in the communication signal using the resulting dispersion-compensated signal.

Abstract: The present disclosure generally discloses a cross-layer link discovery capability configured to support discovery of cross-layer links of a communication network. The cross-layer link discovery capability may be configured to support discovery of cross-layer links between packet network elements and optical network elements of a communication network. The cross-layer link discovery capability may be configured to support automated and reliable discovery of cross-layer links between ports of packet network elements and ports of optical network elements of a communication network. The cross-layer link discovery capability may be configured to support discovery of cross-layer links between ports of packet network elements and ports of optical network elements based on various port matching techniques, such as port classification, port isolation based on port identification, port isolation based on port probing (e.g.

Abstract: Techniques are provided for protecting the privacy of user equipment during paging operations in a communication system. In one example, a method includes determining at a mobility management element of a communication system that a paging operation is to be initiated for given user equipment. The method further includes restricting the paging operation between the mobility management element and the given user equipment to use of a temporary identifier for the given user equipment. By not using a permanent identifier of the given user equipment during paging operations, the given user equipment is effectively non-trackable by malicious base stations and active/passive listeners.

Abstract: The present invention provides a method of route optimization involving a first mobile device associated with a first home gateway. One embodiment of the method is implemented in a first mobility forwarding entity and includes registering the first mobile device at the first mobility forwarding entity. The first mobile device is registered using a session key included in a registration message transmitted by the first mobile device. The embodiment also includes establishing a secure route between the first mobility forwarding entity and a terminating node using the session key. The secure route bypasses the first home gateway.

Abstract: The present disclosure generally discloses improvements in computer performance for supporting automatic recovery for a remote management service (RMS) based on an RMS automatic recovery capability. The RMS automatic recovery capability may be configured to support automatic recovery for an RMS by supporting automatic recovery for a managed device that is experiencing a device authentication failure. The RMS automatic recovery capability may be configured to support automatic recovery for an RMS based on configuration of a load balancer of the RMS to recognize an authentication failure of a managed device and to trigger the managed device to enter a bootstrap process based on recognition of the authentication failure of the managed device. The RMS automatic recovery capability may be configured to support automatic recovery for an RMS based on configuration of a managed device to initiate a bootstrap process based on an indication from a load balancer of the RMS.

Abstract: The present disclosure generally discloses improvements in computer performance for supporting troubleshooting in a remote management service (RMS) based on an RMS troubleshooting capability. The RMS troubleshooting capability may be configured to enable troubleshooting within the context of an RMS configured to support remote management of a managed device(s) by a managing device(s). The RMS troubleshooting capability may be configured to support troubleshooting for an RMS by isolating traffic of managed devices for which troubleshooting is not being performed (e.g., which traffic is directed to managing devices of the RMS) from traffic of managed devices for which troubleshooting is being performed (e.g., which traffic is directed to troubleshooting devices of the RMS). The RMS troubleshooting capability may be configured to support troubleshooting for an RMS by directing traffic of a managed device to a troubleshooting server, rather than to a managing device (e.g.

Abstract: The present disclosure generally discloses improvements in computer performance for delivery of content via a wireless communication network. The present disclosure generally discloses improvements in computer performance for delivery of content to wireless end devices via a wireless communication network using unicast services and multicast-broadcast services of the wireless communication network based on a service switching capability configured to support dynamic and opportunistic switching between the unicast services and multicast-broadcast services of the wireless communication network. The service switching capability may be configured to support dynamic and opportunistic switching between use of unicast service and use of multicast-broadcast service for a content item on a serving cell based on a number of wireless end devices on the serving cell that are receiving or requesting the content item.

Abstract: The present disclosure generally discloses improvements in computer performance for supporting a multipath transport throughput capability that is configured to improve throughout of a multipath transport connection of a multipath transport protocol. The multipath transport throughput capability is configured to improve the throughput of the multipath transport connection by improving delivery of acknowledgment packets acknowledging successful delivery of data packets sent from a data transmitting side to a data receiving side.

Abstract: An optoelectronic circuit having a substantially planar double-sided substrate, each side of which has a respective plurality of electrically conducting tracks and a respective plurality of planar optical waveguides. The substrate also has at least one via crossing the substrate in a manner that can be used to establish an optical path across the substrate, e.g., between optical waveguides located on different sides thereof. In an example embodiment, the electrically conducting tracks and planar optical waveguides are configured to operatively connect various optoelectronic devices and auxiliary electrical circuits attached to the two sides of the substrate using hybrid-integration technologies. In some embodiments, two or more of such double-sided substrates can be stacked and optically and electrically interconnected to create an integrated three-dimensional assembly.

Abstract: In one example embodiment, a method includes transmitting a plurality of first beacons over a first scanning period, the plurality of first beacons associated with different direct energy beams, the transmitting including, transmitting the plurality of first beacons over sub-periods of the first scanning period, respectively; obtaining an indication of a preferred first beacon, the preferred beacon being received by a network element during the transmitting of the plurality of beacons over the first scanning period; and communicating with the element during a scheduled portion of a first data communication period using the beam associated with the preferred first beacon, a length of the first scanning period and a length of the first data communication period forming a length of a time transmission interval.

Abstract: An embodiment of the disclosed MIMO transceiver uses a single master clock to generate (i) the sampling-clock signals for the analog-to-digital and digital-to-analog converters and (ii) the multiple electrical local-oscillator signals that are used in various channels of the transceiver's analog down- and up-converters to translate signals between the corresponding intermediate-frequency and RF bands. The MIMO transceiver may employ a plurality of interconnected frequency dividers configured to variously divide the master-clock frequency to generate the sampling-clock signals and the multiple local-oscillator signals in a manner that causes these signals to have different respective frequencies. In embodiments designed for operating in the mmW band, the MIMO transceiver may also employ a frequency multiplier configured to multiply the master-clock frequency to generate an additional local-oscillator signal for translating signals between the mmW and RF bands.

Abstract: In a method and system for opportunistic delivery of less-than-best-effort application data, a WIN network identified the elements of the wireless network servicing a specified mobile client. One or more elements of the wireless network servicing the specified mobile client monitor the connection state of a mobile client and notify the WIN network of connection state changes so that a chatty application running on an external application server may be notified by the WIN network to deliver packet data when the specified mobile client is connected to the network for some other purpose or when unused network resources are available. In this way, network resource overload caused by chatty applications is reduced.

Abstract: System and method for reporting usage of a network infrastructure includes obtaining a map that includes at least one flow-mapping that correlates a flow feature with a service and that correlates a flow feature with an endpoint type, wherein the endpoint types include at least a subscriber type and a service type; at a first computer, receiving flow telemetry of a network infrastructure, the flow telemetry representing at least the destination and source attributes for network traffic in the flow telemetry; categorizing the flow telemetry into at least a subscriber flow category based on the source and destination endpoint types of the traffic; for subscriber flow telemetry of a subscriber, processing the subscriber flow telemetry into at least one flow feature; identifying at least one service to attribute to at least a portion of the subscriber flow telemetry, the service identified through the processed flow feature and a flow-mapping.

Abstract: A controller in a wireless communication system includes a transceiver to receive channel activity reports from a first node and a plurality of second nodes that are connected to the first node. The first node supports wireless communication over one or more first channels of a licensed frequency band and second channels of an unlicensed frequency band. The second node supports wireless communication over the second channels of the unlicensed frequency band. The controller also includes a processor to allocate a subset of the second channels to the first node and the plurality of second nodes based on the channel activity reports.