Abstract: The present invention discloses the method and apparatus for topology discovery enabled intrusion detection. In information and communications technology (ICT) systems, end devices are organized into subnets that are communicated with the system center through the multi-service gateways. Any intrusion can incur the variations of the communications environments and the subnet topologies. The potential external intruding devices are detected by the varied communications environments and identified by the difference between the original and new subnet topologies constructed by the topology discovery method. The information of potential external intruding devices is sent to the system center for device authentication. If passed, the device is kept associated and the topology of the entire ICT system is updated with the newly discovered subnet topology. If failed, the device is enforced to disassociate, and an enhanced secure mode is triggered where the messages communicated over the intruded subnet are encrypted.

Abstract: A resource mapping method and apparatus are described that reduce resource mapping complexity. The method includes an access network device obtaining resource mapping information of at least one terminal, and sending the resource mapping information to the at least one terminal respectively. The resource mapping information indicates a resource element RE to which each of the at least one terminal performs mapping in each RMB in a first resource mapping block RMB set. An RE to which a first terminal performs mapping in each RMB in the first RMB set is determined based on a first interleaved sequence, and the first interleaved sequence is determined based on a base sequence. The first terminal is any one of the at least one terminal, and the first RMB set includes at least one RMB.

Abstract: Embodiments of this application provide an information transmission method and an apparatus, to improve transmission reliability. The method includes: obtaining, by a terminal device, a to-be-sent pilot sequence, where the to-be-sent pilot sequence is a Reed-Muller sequence; and sending, by the terminal device, the to-be-sent pilot sequence.

Abstract: The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector.

Abstract: Embodiments of systems and methods for dicing a bonded structure are provided. A method includes the following operations. First, a scan pattern can be determined for forming a series of ablation structures in the bonded structure. Relative positions between the series of ablation structures and a bonding interface of the bonded structure can then be determined. The bonding surface may be between a first wafer and a second wafer. At least one of one or more focal planes or a depth of focus of a laser beam may be determined based on the relative positions between the series of ablation structures and the bonding interface. Further, the laser beam may be determined. The laser beam has a series of pulsed lasers. Further, the laser beam may be moved in the bonded structure according to the scan pattern to form the series of ablation structures in the bonded structure.

Abstract: An adaptive method for sending data over a communications path from a source node to a destination node through a communications tunnel, the communications path comprising the source node, the destination node, and at least one intermediate node. The steps include initiating a communications session; determining a communication path for establishing the communications tunnel from the source node to the destination node, the path comprising one or more intermediate nodes; synchronizing the nodes; measuring the channel conditions of each of the communication segments between nodes to determine at least one channel transmission parameter; selecting a transmission scheme dependent on the channel parameter(s); reserving resources at the intermediate node(s) and destination node in sequential time slots such that resources at a node are reserved during the time slot in which the data is expected to arrive; and transmitting data through the communications tunnel using the selected transmission scheme.

Abstract: This application provides a channel encoding method, an encoding apparatus, and a system. A bit sequence X1N is output by using X1N=D1N FN, where D1N is a bit sequence obtained after an input bit sequence u1N is encoded based on locations of K to-be-encoded information bits in an encoding diagram that has a mother code length of N, u1N is a bit sequence obtained based on the K to-be-encoded information bits, and FN is a Kronecker product of log2 N matrices F2. In the foregoing technical solution, in particular, a design considers that the locations of the K to-be-encoded information bits in the encoding diagram that has a mother code length of N include a row location index set H of the information bits in the encoding diagram and a layer location index set M of the information bits in the encoding diagram, where 0?H?N, and 0<M?logm N?1.

Abstract: Methods and systems for scheduling successive transmissions in a wireless local area network (WLAN). An Access Point (AP) can generate a control signal that includes an identifier field for indicating that previous resource allocation from a previous transmission is to be repeated, and therefore the control signal itself does not contain resource allocation information. One or more stations (STAs) can receive the control signal and can use the previous resource allocation information stored in their respective memory to perform the transmission. The resource allocation can include three-dimensional (3D) resource allocation, which refers to time, frequency and space-domain multiplexing. Because the control signal has the identifier field, the AP can reduce network load and free resources for payload data or other traffic.

Abstract: The present invention discloses a terminal access method and an apparatus, to resolve a problem in an existing SCMA multi-terminal access mechanism that a conflict causes system performance degradation and may cause system retransmission. The method is as follows: determining, by a terminal, to enter a contention-based access phase; and determining, by the terminal during each transmission of binary data, a first signature according to a random number seed and a signature matrix, and mapping, according to the first signature, the binary data to a multi-dimensional symbol for transmission, where first signatures used during different transmissions of binary data are different.

Abstract: In accordance with embodiments, methods and systems for CSI feedback overhead reduction are disclosed. A receiving device (e.g., a STA) receives a channel sounding packet from a transmitting device (e.g., an AP). The channel sounding packet comprises a preamble for channel state information (CSI) estimation. The receiving device transmits a feedback signal to the transmitting device. The feedback signal comprises feedback information. The feedback information comprises estimated CSI or information associated with a channel prediction error based on the channel prediction error and the estimated CSI. After receiving the feedback signal from the receiving device, the transmitting device beamforms a beam to transmit data to the receiving device based on the feedback information.

Abstract: The present invention discloses a MEMS device and an electronics apparatus. The MEMS device comprises: a substrate; a MEMS element placed on the substrate; a cover encapsulating the MEMS element together with the substrate; and a port for the MEMS element to access outside, wherein the port is provided with a filter which has mesh holes and includes electrets to prevent particles from entering into the MEMS element.

Abstract: Methods and systems for scheduling successive transmissions in a wireless local area network (WLAN). An Access Point (AP) can generate a control signal that includes an identifier field for indicating that previous resource allocation from a previous transmission is to be repeated, and therefore the control signal itself does not contain resource allocation information. One or more stations (STAs) can receive the control signal and can use the previous resource allocation information stored in their respective memory to perform the transmission. The resource allocation can include three-dimensional (3D) resource allocation, which refers to time, frequency and space-domain multiplexing. Because the control signal has the identifier field, the AP can reduce network load and free resources for payload data or other traffic.

Abstract: Methods and systems that enable payload data to be spread over a number of a plurality of sub-carriers for wireless transmissions between Access Points (AP) and stations (STA) in a WLAN. The AP receives each STA's status information, and controls an amount of spreading of the payload data that can flexibly and variably takes into account the desired amount of peak power consumption, the required data rate, and the channel conditions. Based on these factors, the AP determines a number of sub-carriers for each STA that will be used to carry the spread payload data. Example embodiments can address high power peak consumption, data rate inflexibility and inefficient spectrum communication as found in conventional wireless systems.

Abstract: An adaptive method for sending data over a communications path from a source node to a destination node through a communications tunnel, the communications path comprising the source node, the destination node, and at least one intermediate node. The steps include initiating a communications session; determining a communication path for establishing the communications tunnel from the source node to the destination node, the path comprising one or more intermediate nodes; synchronizing the nodes; measuring the channel conditions of each of the communication segments between nodes to determine at least one channel transmission parameter; selecting a transmission scheme dependent on the channel parameter(s); reserving resources at the intermediate node(s) and destination node in sequential time slots such that resources at a node are reserved during the time slot in which the data is expected to arrive; and transmitting data through the communications tunnel using the selected transmission scheme.

Abstract: Embodiments of this application provide an information transmission method and an apparatus, to improve transmission reliability. The method includes: obtaining, by a terminal device, a to-be-sent pilot sequence, where the to-be-sent pilot sequence is a Reed-Muller sequence; and sending, by the terminal device, the to-be-sent pilot sequence.

Abstract: The present invention discloses a terminal access method and an apparatus, to resolve a problem in an existing SCMA multi-terminal access mechanism that a conflict causes system performance degradation and may cause system retransmission. The method is as follows: determining, by a terminal, to enter a contention-based access phase; and determining, by the terminal during each transmission of binary data, a first signature according to a random number seed and a signature matrix, and mapping, according to the first signature, the binary data to a multi-dimensional symbol for transmission, where first signatures used during different transmissions of binary data are different.

Abstract: Systems, methods, and devices relating to short range wireless communications. A host device wirelessly communicates with a user device. The transceiver on the host device is of a greater complexity than the transceiver on the user device. The host device performs a number of signal processing steps on data to be exchanged with the user device such that the complexity of the processing to be done by the user device is significantly reduced. This approach thereby reduces the complexity of the transceiver on the user device. The host device processing includes pre-channel equalization and pre-synchronization.

Abstract: Embodiments of the present disclosure provide for materials that include a pre-designed patterned, porous membrane (e.g., micro- and/or nano-scale patterned), structures or devices that include a pre-designed patterned, porous membrane, methods of making pre-designed patterned, porous membranes, methods of separation, and the like.

Abstract: A method of manufacturing a protection frame used in a miniature microphone is provided.

Abstract: The present invention is an adaptive secure wireless communications system and method. Generally, the present invention may be operable to address challenges and threats to a secure communication session. The secure wireless communication system of the present invention may operate one or more of the following: multiple physical-layer attributes monitoring; multiple parameter confidence testing related to transceiver (Tx-Rx) specific environment and transmitter receiver hardware characteristics; continuous and interleaved authentication; and security enhancement using dynamic adaptation of the transmission system parameters based concurrent and/or conjugated transmission of data-carrying signal and security control information. The real-time physical-layer related monitoring and interaction between transmitter and receiver, using Tx-Rx related physical environment, of the present invention may effectively reduce many wireless security threats including interception and spoofing.