Abstract: An updating apparatus and method for an access control parameter and a communication system. The updating method includes: determining by a UE access class barring information for performing access control and update period information for updating the access class barring information; and updating the access class barring information by the UE based on the update period information. The UE itself improves fairness of the access, and the network side updates the access control parameter only when the network payload is modified, which may lower power consumption of the UE in access, avoid frequent occurrence of paging and reduce use of broadcast resources of the system.

Abstract: An apparatus and method for paging a UE and a communications system. The method includes: calculating a first-grade paging group index based on an inherent identity of the UE, or based on an inherent identity of the UE and a network configuration parameter; calculating a second-grade paging group index based on a network identity allocated by an MME; receiving indication information for indicating paging group indices transmitted by a base station; determining whether the information contained in the indication information is consistent with the first-grade paging group index and the second-grade paging group index; and decoding a downlink data channel to determine whether the UE is paged when it is consistent. Hence, different paging groups may have identical or approximate numbers of UEs, which may reduce a probability of “false paging” of the overall cell.

Abstract: A transmission method and apparatus for a demodulation reference signal and a communications system. The transmission method includes: transmitting a DMRS by a transmitting device to a receiving device; the number of symbols in each subframe for transmitting the DMRS is configured as 1 or more than 2. Hence, more than 2 symbols for transmitting the DMRS are configured in each subframe, which may increase a transmission density of DMRS, and satisfy a demand of a new traffic, such as V2X, for a moving speed; or a single symbol for transmitting the DMRS is configured in each subframe, which may satisfy a demand of a low-speed mobile traffic, such as the cellular IOT, and lower overhead.

Abstract: The disclosure relates to a USB function-type magnetic cable, comprising a USB cable main body and a USB moveable plug; an end B of the USB cable main body is in moveable connection with the USB moveable plug; an end A of the USB cable main body is in connection with a computer or charger, the end B of the USB cable main body is in connection with a mobile device through the USB moveable plug; the end B of the USB cable main body comprises a first PCB board, and the first PCB board is configured to output a control signal to cut off a power supply circuit when detecting a temperature abnormity of the USB moveable plug or a supply voltage abnormity.

Abstract: Embodiments of this disclosure provide a method and apparatus for performing multiuser superposition transmission over repetition-based transmission and a system. In this embodiment, the method includes: an eNB transmits repetition configuration information or repetition configuration information and modulation scheme information of second UE utilizing a repetition-based transmission technique to first UE paired with the second UE for performing MUST transmission, so that the first UE detects data of the second UE and performs interference cancellation according to the repetition configuration information or the repetition configuration information and the modulation scheme information of the second UE, so as to obtain data of the first UE. With the embodiments of this disclosure, unnecessary signaling overhead and repeated detection may be avoided, thereby improving performance and efficiency of MUST transmission.

Abstract: Embodiments of this disclosure provide a method and apparatus for feeding back channel state information, a user pairing method and apparatus, a data transmitting method and apparatus and a system. In one embodiment, the apparatus for feeding back channel state information includes: a feedback unit configured to feed back channel state information to an eNB, the channel state information including a precoding matrix index (PMI); a first channel quality indicator (CQI1) corresponding to the PMI; and azimuth angle reference information. With a new CSI feedback mechanism of the embodiments of this disclosure, an eNB may avoid selecting UEs with a relatively large azimuth angle for pairing, and may only select or preferentially select UEs with a relatively small azimuth angle for pairing, thereby preventing loss of gains of beamforming of paired UEs, and improving performance of MUST transmission.

Abstract: Write commands are received for a Data Storage Device (DSD) to store write data in a plurality of corresponding write locations on at least one disk of the DSD. At least a portion of the write data is cached in at least one Media Based Cache (MBC) region of the at least one disk based on a write cache policy for determining which write data is eligible for caching in the at least one MBC region. The at least one MBC region is used to cache data to be stored in other locations on the at least one disk. During an active time period when host commands are performed on the at least one disk, a portion of an I/O bandwidth for performing commands is used to copy the at least a portion of the write data to corresponding write locations of the plurality of corresponding write locations.

Abstract: The present disclosure provides a method and apparatus for transmitting a common signal in hybrid beamforming. The method includes: acquiring an analog common signal to be transmitted; selecting a different codeword for each RF chain from a codebook for analog beamforming and obtaining an analog beamformer; beamforming the analog common signal to be transmitted in each RF chain according to the analog beamformer; and transmitting the beamformed analog common signal in each RF chain.

Abstract: A second language instruction system enabling a user to learn a second language through one or more life-like scenarios in a virtual world. The second language instruction system includes a computing device in electrical communication with a server via a network, the computing device is configured to assess the second language abilities of the user, receive one or more scenario preferences of the user, and generate a customized learning syllabus at least partially based on the assessed second language abilities of the user and the received one or more scenario preferences of the user, portions of the customized learning syllabus are downloaded for use and deleted after completion to minimize the amount of data stored on the computing device.

Abstract: A data storage device includes a disk, a head, a microactuator, a coarse actuator, and a servo controller. The microactuator is configured to position the head relative to the disk. The coarse actuator is configured to position the microactuator relative to the disk. The servo controller is configured to generate an adjusted position error signal based on a position error signal and an estimated microactuator position signal. The servo controller is also configured to filter the adjusted position error signal with a shaping filter to generate a filtered position error signal, and to provide sliding mode control of the coarse actuator based at least partially on the filtered position error signal.

Abstract: A data storage device includes a disk, a head, a microactuator, a coarse actuator, and a servo controller. The microactuator is configured to position the head relative to the disk. The coarse actuator is configured to position the microactuator relative to the disk. The servo controller is configured to generate an adjusted position error signal based on a position error signal and an estimated microactuator position signal. The servo controller is also configured to filter the adjusted position error signal with a shaping filter to generate a filtered position error signal, and to provide sliding mode control of the coarse actuator based at least partially on the filtered position error signal.

Abstract: Robust crowd counting is an important yet challenging task of interest in a number of applications and is compounded by the fact that crowd behavior is unpredictable. Traditional approaches that tackle these issues are mainly classified into two categories: video based recognition and non-image based localization. However, both suffer inherent drawbacks such as being limited to line-of-sight or requiring people to carry specific electronic devices which limit them even within relatively well controlled environments without considering public locations or rapidly emerging events. Accordingly, it would be beneficial to provide a system that implements a device free crowd counting methodology with no impact on network capacity and/or performance.

Abstract: A data storage device is disclosed comprising a spindle motor configured to rotate a disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings of the spindle motor are commutated based on a commutation sequence while applying a periodic driving voltage to each winding. During a seek operation to seek the head a seek length, an amplitude of the periodic driving voltage is adjusted according to a driving profile corresponding to the seek length, wherein the driving profile compensates for a power disturbance during the seek operation.

Abstract: The present disclosure provides a method and apparatus for transmitting a common signal in hybrid beamforming. The method includes: acquiring an analog common signal to be transmitted; selecting a different codeword for each RF chain from a codebook for analog beamforming and obtaining an analog beamformer; beamforming the analog common signal to be transmitted in each RF chain according to the analog beamformer; and transmitting the beamformed analog common signal in each RF chain.

Abstract: To increase the number of CSI-RSs for interference measurement to improve interference measurement accuracy, a first reference signal for channel state measurement and a second reference signal for interference measurement are assigned to reference signal resources defined for transmission of the first reference signal, and a mobile terminal apparatus that supports both the first reference signal and the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal and the second reference signal. A second mobile terminal apparatus that supports the first reference signal and that does not support the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal, and of assignment information indicating that resources assigned the second reference signal are assigned a third reference signal of zero power for channel state measurement.

Abstract: A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by servo sectors, wherein each servo sector comprises a plurality of servo bursts and the servo sectors define a plurality of servo wedges. A first write operation is executed to a first track and a first absolute position for the head is generated corresponding to a first servo wedge. A second write operation is executed to a second track and a second absolute position for the head is generated corresponding to the first servo wedge. An off-track write condition is detected when executing the second write operation based on the first absolute position and the second absolute position. The first absolute position comprises a track address of the first track and a position error measurement based on the servo bursts in the first servo wedge.

Abstract: A data storage device is disclosed comprising a head actuated over a disk comprising tracks defined by servo sectors. A location of the head is generated based on the servo sectors, and a position error signal (PES) representing a difference between a target location for the head and the measured location for the head is generated. An actuator control signal (ACS) is generated in response to the PES, a disturbance compensation signal (DCS) is generated based on the PES and the ACS, and the DCS is filtered with a disturbance observer filter. The DCS is filtered with a plurality of band-pass filters, and an output of one of the band-pass filters is filtered with a peak detection filter configured to detect a peak frequency corresponding to a peak in a frequency response of the band-pass filter, wherein the disturbance observer filter is adjusted based on the peak frequency.

Abstract: A data storage device is disclosed comprising a first disk surface comprising servo data defining servo tracks at a first radial density, a first head, and a voice coil motor (VCM) configured to actuate the first head over the first disk surface using a servo control system. A load operation is executed to load the first head over the first disk surface, and a back electromotive force (BEMF) voltage generated by the VCM during the load operation is evaluated to generate an estimated distance traveled. The servo data on the first disk surface is detected, and an initial servo track during the load operation based on the detected servo data to generate a measured distance traveled. A gain of the servo control system is configured based on the estimated distance traveled and the measured distance traveled.

Abstract: A data storage device is disclosed comprising a microactuator configured to actuate a head over a disk. A control signal applied to the microactuator is generated based on an input sequence u(k). A Preisach bit map bj is updated based on the input sequence u(k), wherein the Preisach bit map bj corresponds to a Preisach plane modeling a hysteretic response of the microactuator. A current compensation value yi is generated based on an update value generated based on: ? j ? h ? ( j ) ? b ^ j where hj represents a slice of the Preisach plane and {circumflex over (b)}j is an update bit map based on at least part of the Preisach bit map bj. The current input ui and the current compensation value yi are combined to generate the control signal applied to the microactuator.

Abstract: A disk drive is disclosed comprising a head, a disk surface comprising servo information, and a dual stage actuator (DSA) servo loop comprising a voice coil motor (VCM) servo loop comprising a VCM and a microactuator servo loop comprising a microactuator operable to actuate the head over the disk surface. A position error signal (PES) is generated based on the servo information, and a first control signal is generated based on the PES. The first control signal is adjusted based on a function of the first control signal to generate a second control signal that compensates for a gain variation of the microactuator, and the microactuator is controlled based on the second control signal.