Abstract: A signal transmission and reception method and apparatus and a communication system, the signal transmission and reception apparatus being applicable in an IAB-DU and includes a first receiver configured to receive uplink data transmitted to a parent node of an integrated access and backhaul (IAB) node via an uplink; and a first transmitter configured to transmit flow control feedback information to a child node of the integrated access and backhaul node, the flow control feedback information being used to indicate a load status of uplink transmission of the integrated access and backhaul node.

Abstract: A random access method and apparatus and resource configuration method and apparatus. The random access apparatus includes: a third receiving unit configured to, on a physical random access channel resource, receive a random access preamble transmitted by a terminal equipment; wherein the random access preamble is used to indicate that the terminal equipment has sidelink data to be transmitted, and/or the physical random access channel resource is used to indicate that the terminal equipment has sidelink data to be transmitted; and a second transmitting unit configured to transmit a random access response to the terminal equipment. By indicating in the random access procedure to the network device that the terminal equipment has a sidelink MAC CE to be transmitted, it may be avoided that the network device does not learn that the terminal equipment has a sidelink MAC CE to be transmitted, so that the network device allocates resources for the sidelink, and resource consumption may be lowered.

Abstract: A terminal equipment includes: processor circuitry configured to select a group of Random Access Occasions (ROs) from a set of random access resources, the group of ROs including more than one physical random access channel occasion (PRACH occasion, RO); a transmitter configured to transmit a Msg1 (Message 1) with a PRACH transmission on one or more ROs of the group of ROs; and a receiver configured to receive a Msg2 (Message 2) used to carry a random access response (RAR) in response to the Msg 1 after a last RO of the group of ROs.

Abstract: A base station that switches between uplink periods and downlink periods in a time division manner and performs communication, the base station includes a memory; processor circuitry coupled to the memory, wherein the processor circuitry is configured to: notify of allocation information indicating a combination of resources for time division duplex (TDD) uplink (UL) or downlink (DL) configuration at a predetermined interval; and generate control information indicating cancelation of transmission of a downlink signal, wherein the canceled transmission is configured to be performed by using one of the resources designated by the allocation information, and wherein the processor circuitry is further configured to transmit the generated control information.

Abstract: A delay control circuit includes a delay circuit configured to provide a predetermined delay to signals input to a plurality of electrode segments provided in series along one or both of two waveguides forming a Mach-Zehnder interferometer of an optical modulator, a control circuit configured to select two electrode segments from the plurality of electrode segments, and control a delay amount between the two electrode segments that are selected, a frequency filter configured to extract a predetermined frequency component from output light of the Mach-Zehnder interferometer, in a state where identical signals that vary at random are input to the two electrode segments, and a monitor configured to monitor a power of the extracted predetermined frequency component. The control circuit controls the delay amount between the two electrode segments based on a monitored result of the extracted predetermined frequency component.

Abstract: An information transmitting apparatus, configured in a terminal equipment, includes: processor circuitry configured to trigger a delay information reporting at a media access control layer of the terminal equipment; and a transmitter configured to transmit the delay information reporting to a network device via a media access control control element, wherein that the processor circuitry triggers the delay information report at the media access control layer of the terminal equipment comprises: the media access control layer of the terminal equipment determines whether to trigger the delay information report according to a value of at least one discard timer.

Abstract: An indicating apparatus, configured to indicate unused transmission occasions, configured in a terminal equipment, includes: determining processor circuitry configured to determine an unused transmission occasion at a media access control layer of the terminal equipment; and indicating processor circuitry configured to indicate relevant information on the unused transmission occasion to a physical layer of the terminal equipment via the media access control layer of the terminal equipment; wherein the determining processor circuitry determines whether a transmission occasion in a predetermined number of valid transmission occasions is an unused transmission occasion.

Abstract: A terminal includes: a receiver configured to receive third information related to transmission power and fourth information related to transmission power; a controller configured to generate measurement information for each of a plurality of sub-configurations for measurement in accordance with the third information and the fourth information; and a transmitter configured to transmit the measurement information, wherein the controller estimates second information related to reception power of a third signal corresponding to each of the plurality of sub-configurations for measurement according to first information related to reception power of a second signal received by the receiver, the third information, and the fourth information, and generates the measurement information.

Abstract: A method and apparatus for transmitting uplink control information and a communication system. The method includes a terminal equipment transmits uplink control information, the uplink control information being related to at least two TRPs. The uplink control information is transmitted in a manner of spatial diversity. At the terminal side, the same data may reach a network side via different spatial domain paths or via different TRPs (transmission and reception points). In a case where blockage occurs in a path, other paths may still continue to operate, thereby ensuring high reliability of the uplink control information. The number of retransmissions of the uplink control information may be avoided or reduced, thereby lowering transmission latency of uplink data.

Abstract: An optical signal transmission device and method based on digital predistortion in a symbol domain is provided. The optical signal transmission device includes: a memory; and a processor coupled to the memory to control execution of a process to: perform digital predistortion processing on a symbol sequence of a signal to be transmitted to obtain a digital predistortion processed signal; perform short-pulse shaping processing on the digital predistortion processed signal to obtain a short-pulse shaping processed signal, wherein a memory length introduced by the short-pulse shaping processing is less than or equal to a memory length of the optical transmitter; and generate and transmit an optical signal based on the short-pulse shaping processed signal.

Abstract: A terminal device includes: a receiver configured to be able to receive an RRC (radio resource control) message and a first signal from a base station device; and processor circuitry configured to be able to perform configuration according to a first parameter in a case where the RRC message includes the first parameter, wherein the first parameter includes a second parameter indicating a group identifier of a current serving cell and a third parameter related to a configuration of a first LTM (L1/L2 Triggered Mobility) candidate and a group identifier of a cell of the first LTM candidate, the processor circuitry stores a second value of the second parameter in a first variable regardless of whether a first value is stored in the first variable in a case where the second parameter is included in the RRC message.

Abstract: A Doherty amplification device includes a distributor to distribute, into first and second signals, an input signal after distortion-compensation, first and second amplifiers, a combiner to combine the amplified first and second signals, and an adjuster between the distributor and the first or second amplifiers and to include a first calculation circuit to obtain a first-characteristic indicating a relationship of a gain of an output signal with respect to reference-power of the input signal, based on the output signal and the input signal, a classification circuit to classify the first-characteristic into regions according to the reference-power, a second calculation circuit to obtain a statistical-value of the gain for each regions, and a determination circuit to set, in the adjuster, a phase-delay at which distortion to be generated in the output signal is minimized, based on the statistical-value, wherein the adjuster adjusts the phase-delay of the first or second signals.

Abstract: An inter-device coordination apparatus includes a receiver configured to receive first sidelink information from a second terminal equipment and second sidelink information from a third terminal equipment; a processor configured to, according to the first sidelink information and the second sidelink information, determine that a conflict occurs in a first resource reserved by the first sidelink information; and a transmitter configured to transmit to the second terminal equipment first coordination information for indicating that a conflict occurs in the first resource, wherein a priority of the first coordination information is equal to the highest priority in a priority of the first sidelink information and a priority of the second sidelink information.

Abstract: Provided is an optical transmission device facing another optical transmission device via a transmission line having a predetermined transmission line loss. The optical transmission device includes a first transceiver that transmits first measurement light based on an optical time domain reflectometer (OTDR) to the transmission line and receives first return light based on reflection of the first measurement light from the transmission line, a measurer that measures a first optical loss in the transmission line based on the first measurement light and the first return light, a receiver that receives predetermined information related to a second optical loss in the transmission line from the another optical transmission device, and a calculator that calculates an inter-device distance between the optical transmission device and the another optical transmission device based on the first optical loss, the second optical loss, and the transmission line loss.

Abstract: A group migrating apparatus, configured in a second donor device, wherein the apparatus includes processor circuitry configured to, when a migrating IAB-node moves from a first donor device to the second donor device, perform at least one of the following processing enabling the migrating IAB-node to update a first TNL address used for a first F1-C connection to a second TNL address, enabling the migrating IAB-node to update a third TNL address used for a second F1-C connection to a fourth TNL address, configuring the migrating IAB-node with a fourth TNL address used for setting up a second F1-C connection, adding for the migrating IAB-node a second TNL address used for a first F1-C connection, configuring the migrating IAB-node with a third TNL address used for setting up a second F1-C connection, and adding for the migrating IAB-node a fourth TNL address used for a second F1-C connection.

Abstract: An optical transmission system includes a first optical transmission device that transmits a first signal light in an actual operation and a first pseudo light having a wavelength different from that of the first signal light, a second optical transmission device that receives the first signal light and the first pseudo light from the first optical transmission device, a measurer that measures a first quality of the first pseudo light between the first optical transmission device and the second optical transmission device, and an estimator that estimates a second quality of the first signal light between the first optical transmission device and the second optical transmission device based on the first quality and an indicator value of wavelength dependence in a signal band.

Abstract: A method and an apparatus for evaluating transmission impairments of a multiplexing converter. According to the method, impairments of a multiplexing converter are equivalent to the equivalent multiplicative noise and the equivalent additive noise, so as to allow evaluation of transmission impairments of the multiplexing converter, thereby to allow evaluation of the performance of a communication system. The multiplexing converter is a multiplexing analog-to-digital converter, or a multiplexing digital-to-analog converter. According to the present application, impairments of a multiplexing converter can be evaluated accurately, the performance evaluation of a communication system using the multiplexing converter is given, without being affected by an amplitude, a modulation format and a transmission rate of an input signal.

Abstract: A semiconductor device includes: a substrate; an electron traveling layer provided above the substrate; an electron supply layer provided above the electron traveling layer; gate, source and drain electrodes provided above the electron supply layer; first protrusions that extend from a lower end of the source electrode through an inside of the electron supply layer to below an upper surface of the electron traveling layer; and second protrusions that extend from a lower end of the drain electrode through the inside of the electron supply layer to below the upper surface of the electron traveling layer, wherein a first volume ratio of the first protrusions in a first area where the first protrusions is provided is 60% or less, and a second volume ratio of the second protrusions in a second area where the second protrusions is provided is 60% or less.

Abstract: A terminal apparatus includes: a controller configured to perform control corresponding to a first cell state that is a first mode and a second cell state that is a second mode different from the first mode; and a receiver configured to receive information regarding a second condition that is a condition indicating that a third event condition is no longer fulfilled in a case of a second time at which a predetermined duration has elapsed from a first time from the base station apparatus, wherein the receiver receives a PDCCH notifying of validation of the third event condition from the base station apparatus, and the controller controls to perform evaluation of a first event condition of conditional handover corresponding to the first cell state until a first condition that the PDCCH is received is fulfilled.

Abstract: Signal transmission and reception methods and apparatuses. The method includes: determining by a terminal equipment that a time-frequency resource of a first uplink signal and a time-frequency resource of a second uplink signal at least partially overlap in a time domain or a time-frequency domain; comparing the first uplink signal and the second uplink signal, the comparing at least comprising comparing a first priority of the first uplink signal and a first priority of the second uplink signal, the first priority being related to content carried or indicated by an uplink signal; and transmitting the first uplink signal and/or the second uplink signal to a network device.