Abstract: In one embodiment, a maximum transmission unit (MTU) mismatch assessment service receives a notification of a mismatch between a packet size of a packet sent by a source to a destination in a network and an MTU of an intermediate router between the source and destination in the network. The service determines, using a machine learning-based model, that the mismatch represents a persistent MTU mismatch condition at the intermediate router. The service identifies a target router in the network to receive a configuration adjustment instruction, based on the persistent MTU mismatch condition. The service sends the configuration adjustment instruction to the target router, to alleviate the persistent MTU mismatch condition at the intermediate router.

Abstract: Different numerologies may be used to communicate orthogonal frequency division multiplexing (OFDM)-based signals over different frequency sub-bands of a given carrier. This may allow the OFDM-based signals to efficiently support diverse traffic types. In some embodiments, the numerology of OFDM-based signal depends on a bandwidth of the frequency sub-band over which the OFDM-based signals are transmitted. In some embodiments, the OFDM-based signals are filtered OFDM (f-OFDM) signals, and the pulse shaping digital filter used to generate the f-OFDM signals allows the receiver to mitigate interference between adjacent f-OFDM signals upon reception, thereby allowing f-OFDM signals to be communicated over consecutive carriers without relying on a guard band.

Abstract: Uplink synchronization may be achieved without adjusting for timing advance by using longer/larger cyclic prefix durations to compensate for differences in propagation delays, including the cell round-trip delays and environment based multipath delays. In this way, timing advance reference signaling may be omitted from the uplink transmissions. The cyclic prefix duration may be determined based on a characteristic of a base station's coverage area, such as a coverage area size or coverage area type. For example, a longer cyclic prefix length may be used when a base station has a larger coverage area than when the base station has a smaller coverage area. As another example, a different cyclic prefix length may be used for different coverage types. The method provided in this embodiment improves the capabilities of automatic driving and ADAS of electric vehicles. The method can be applied to vehicle networking, such as V2X, LTE-V, V2X, etc.

Abstract: A terminal device and a base station device are capable of communicating with each other efficiently using an uplink channel. The terminal device transmits a transport block on a first shared channel upon detection of a control channel including first control information. For the first control information along with a CRC parity bit scrambled by a first identifier, a size of the transport block is given using a first information field included in the first control information along with the CRC parity bit scrambled by the first identifier, based on whether a second shared channel for an initial transmission of a transport block identical to the transport block corresponding to the first control information is scheduled by a random access response grant.

Abstract: Methods and apparatus allow a mobile device to proactively switch to a new network by using quality of connection information and the rate of change of the received signal strength indication (RSSI) to proactively switch from a first network, such as a WiFi network, to the new network, such as another WiFi network or a cellular network. For example, the mobile device determines a rate of change of the RSSI for the first network. Based on the rate of change of the RSSI, the mobile device predicts when the RSSI of the network is beyond a quality threshold. Based on the prediction, the mobile device switches from the first network to a second network. In another example, the method and device uses a quality of connection of the first network connection to determine when to switch from a first network connection to a second network connection.

Abstract: In some examples, a method can include applying a respective label of a plurality of labels to a network device of a plurality of network devices on a network; determining a respective amount of a performance attribute over a period of time for each client device associated with the network devices; generating an implicit data heap structure of top N client devices across a plurality of distributed processes for each label of the plurality of labels; determining, based on an implicit data heap structure, a client device having the greatest amount of the performance attribute over the period of time for a label of the plurality of labels; and displaying a client identifier of the client device having the greatest amount of the performance attribute.

Abstract: Provided is a terminal with which it is possible, in a heterogeneous cell network, to transmit a Periodic-Sounding Reference Signal (P-SRS) at a transmission bandwidth and power density necessary for carrying out both a process of selection of a transceiving participating base station and a process of frequency scheduling of a Physical Uplink Shared Channel (PUSCH). A terminal (300) comprises a receiving unit (301) which receives control information which includes information which denotes a P-SRS transmission parameter, and a transmission unit (303) which, using a transmission parameter which is included in the received control information, transmits a first P-SRS provided with a first bandwidth and a first power density at a first period, and transmits a second P-SRS provided with a second bandwidth which is narrower than the first bandwidth and second power density which is higher than the first power density at a second period.

Abstract: A method for a base station (BS) operating in a wireless communication system, the method includes transmitting, to a user equipment (UE), first information indicating a threshold value for an uplink data split operation; and receiving a buffer status report (BSR) from the UE, wherein a value of a buffer size in the BSR is determined based on second information that indicates an amount of data available for transmission for a packet data convergence protocol (PDCP) entity of the UE when the amount of the data available for transmission is larger than the threshold value.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a first device, the first device is configured with a second set of slot offsets by a network. The first device receives, from the network, a second Downlink Control Information (DCI) scheduling a sidelink resource. The first device performs sidelink transmission, to a second device, on the sidelink resource. The first device monitors and/or receives a sidelink hybrid automatic repeat request-acknowledgement (SL HARQ-ACK) feedback from the second device in a fourth slot. The SL HARQ-ACK feedback is associated with the sidelink transmission. The first device derives, based on the fourth slot and a second slot offset value indicated by the second DCI, a third slot for transmitting a SL HARQ-ACK to the network. The second set of slot offsets includes the second slot offset value. The SL HARQ-ACK is set/derived/determined based on the received SL HARQ-ACK feedback.

Abstract: Methods and systems are provided for dynamically detecting and correcting the deactivation of beamforming from an antenna. One or more users are identified as present within a particular geographic area typically served by beamforming, and the average signal strength of the one or more user devices is monitored. If a threshold level of degradation of the average signal strength is detected, then a beamforming status is determined for one or more of the antennas serving the user device or devices. Based on the determination, corrective measures are taken and beamforming is reactivated.

Abstract: A routing device receives a forwarding entry for forwarding a first flow and stores it locally. When the device is a key forwarding device of a first flow, the stored forwarding entry includes first and second forwarding entries. When the device is located in a primary forwarding path but is not the key forwarding device, the stored forwarding entry comprises one forwarding entry having a priority higher than a predefined minimum value. The device receives a first flow. When the stored forwarding entry comprises one forwarding entry having a priority higher than the minimum value and a link connected to an egress port in the forwarding entry has failed, the device sets the priority of the forwarding entry as the minimum value, and returns the first flow to the key forwarding device to trigger it to forward the first flow according to the second forwarding entry.

Abstract: Methods and systems are disclosed for using a common frequency spectrum for simultaneous upstream and downstream communications in a network by implementing directional diversity techniques. Non-reciprocal coupling devices, such as circulators, may be configured in the network to provide unidirectional transmission of each signal to prevent interference. In some embodiments, feed-forward interference cancellation is utilized to increase signal isolation of upstream and downstream signals.

Abstract: A communication system for a train having a lead locomotive power group and at least one remote locomotive power group, the system including: a lead locomotive computer in communication with a first and second lead communication device and programmed to: generate a command message; transmit or cause the transmission of the command message from the first lead communication device in a predetermined time slot; and transmit or cause the transmission of the command message from the second lead communication device in a different predetermined time slot; and at least one remote locomotive computer in communication with at least one remote communication device and programmed to directly or indirectly receive the command message from the first lead communication device and/or the second lead communication device. A communication method for a train is also disclosed.

Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for transmitting data in a base station (BS) in a communication system is provided. The method includes transmitting data to a plurality of stations (STAs) included in a group on a first sub-frame based on a schedule preset based on a time division duplexing (TDD) scheme; and receiving acknowledgement (ACK) signals from each of the plurality of STAs on a second sub-frame after a first interval from the first sub-frame.

Abstract: A system and method for blocking normal media content signals, such as television program signals emitted on a visual display of an electronic media device and substituting alternative content for blocked signals includes a control module operable to receive a blocking command via an input device electrically connected to the electronic media device. Receiving a blocking command results in the normal content being blocked and predetermined alternative content is played for either a user specified time or a predetermined time. Control over the television or other media device may be oral via speech recognition technology.

Abstract: Methods, systems, and devices for wireless communication are described. Synchronization signals may be transmitted using a set of phase offsets over different component carriers or using a single component carrier for each antenna port. For example, a base station may identify a set of synchronization signals (e.g., a set of primary synchronization signals (PSSs)) to be transmitted over one or multiple component carriers. In some cases, each PSS may be associated with a different component carrier, and the base station may apply a different phase offset to each PSS when transmitting the set of PSSs on the component carriers. In some examples, the base station may transmit the PSSs on the component carriers using a different antenna port for each component carrier.

Abstract: Distributed machine learning systems and other distributed computing systems are improved by embedding compute logic at the network switch level to perform collective actions, such as reduction operations, on gradients or other data processed by the nodes of the system. The switch is configured to recognize data units that carry data associated with a collective action that needs to be performed by the distributed system, referred to herein as “compute data,” and process that data using a compute subsystem within the switch. The compute subsystem includes a compute engine that is configured to perform various operations on the compute data, such as “reduction” operations, and forward the results back to the compute nodes. The reduction operations may include, for instance, summation, averaging, bitwise operations, and so forth. In this manner, the network switch may take over some or all of the processing of the distributed system during the collective phase.

Abstract: Systems and methods can provide for fabric level verification of host defined port GUIDs in a high performance computing network. A lightweight scheme for fabric level verification of host defined port GUIDs is provided wherein a virtual machine is assigned a set of GUIDs that travel with the virtual machine, even on migration or re-start.

Abstract: A cellular network may provide location services so that clients such as public service access points (PSAPs) can obtain locations of mobile devices. A location request is received first by a Gateway Mobile Location Center (GMLC), which responds by querying a Mobility Management Entity (MME). The MME is configured to query a Serving Mobile Location Center (SMLC) for the location. In some cases, the SMLC fail to respond or may respond with an error indication. In response to certain types of errors, the MME is configured to attempt to obtain the requested location from an alternate SMLC, rather than reporting an error back to the GMLC. Status information is maintained by the MME to keep track of any SMLCs that have returned errors, and these SMLCs are avoided when processing further requests.

Abstract: A load-balancer instance is instantiated in a network virtualization edge (NVE) in a software defined network (SDN). A forwarding table in the NVE is modified to indicate that a next hop for a packet having a destination address of the load-balancer instance is to be resolved by the load-balancer instance. From a portion of the packet, and using the load-balancer instance, a value usable to select a singular next hop to a first real server in a pool of real servers managed by the load-balancer instance is determined. The packet is forwarded, using the modified forwarding table, the packet through an underlay of the SDN such that the packet tunnels from the NVE to a first NVE, the second NVE hosting the first real server.