A frequency offset estimation method, device, communication device and storage medium are provided. The method comprises: acquiring a main peak and a secondary peak of a PRACH signal when detecting that an access signal is in the PRACH signal sent by the signal sending end, wherein the PRACH signal is composed of a preset number of identical leader sequences; determining a first frequency offset according to a peak value of the main peak and a peak value of the secondary peak; performing a frequency offset compensation on the PRACH signal according to the first frequency offset, to obtain a compensation sequence after the frequency offset compensation; and calculating a frequency offset between the compensation sequence and the leader sequences, to obtain a second frequency offset, so as to estimate a time delay of the access signal according to the second frequency offset.

An information control method and a communications device are provided. The method includes: obtaining first information; and executing at least one of the following operations: determining a first delay according to the first information; determining a second delay according to the first information; determining delay requirement information according to the first information; sending the delay requirement information to a network element in a communications network; sending bridge delay information to a third-party network or a third-party application; executing a first operation when it is determined that a first condition is met; and executing a second operation when it is determined that a second condition is met, where the first information includes at least one of the following: first time information, second time information, clock information of a first clock, and clock information of a second clock.

A radio apparatus correlates signal data with stored synchronization data to determine correlation data. The signal data represents a received radio-frequency signal that encodes a data frame, which has a synchronization preamble with a plurality of instances of a predetermined synchronization sequence. The stored synchronization data represents the predetermined synchronization sequence. The radio apparatus identifies a set of peaks in the correlation data, and uses a timing criterion to identify a plurality of subsets of the set of peaks, such that time values of the peaks of each identified subset satisfy the timing criterion. The radio apparatus calculates a correlation score C.sub.j for each of the identified subsets from correlation values of the subset's peaks, and uses the correlation scores C.sub.j to select a subset from the plurality of subsets. Timing or frequency synchronization information for the radio apparatus is determined from the peaks of the selected subset.

A method and an apparatus for clocking data processing modules, with different average clock frequencies and for transferring data between the modules are provided. The apparatus includes a device for providing a common clock signal to the modules. Clock pulses are deleted from the common clock signal to individual modules in dependence on the clocking frequency required by each module. The clock pulses are applied to the modules between which the data is to be transferred at times consistent with the data transfer.

Embodiments of the present application provide a method for acquiring information of access resources, a terminal device, and a base station. A terminal device detects a synchronization signal of a cell to be accessed by the terminal device. The terminal device further receives a broadcast channel of the cell on a broadcast channel resource. The terminal device then determines a resource on which the cell is located according to resource indication information carried in the broadcast channel. The broadcast channel resource corresponds to an actual access resource, and the synchronization signal is detected on the actual access resource. The actual access resource is one of a plurality of candidate access resources of the cell. The resource indication information indicates a location relationship between the actual access resource and the resource on which the cell is located.

An ADC (12) in an optical receiver (1) generates a sample signal composed of time series samples by oversampling a received signal that is an electrical signal converted from an optical signal by a light receiving unit (11). A symbol timing detection unit (132) of a DSP unit (13) detects a symbol timing in the sample signal. When it is determined that a symbol timing is appearing at a longer interval than a predetermined interval based on this detection result, a symbol timing adjusting unit (133) skips one or more samples included in the sample signal to read out samples at the predetermined interval, while when it is determined that the symbol timing is appearing at a shorter interval than the predetermined interval, the symbol timing adjusting unit inserts the same samples as one or more samples included in the sample signal immediately after the one or more samples to read out the samples at the predetermined interval.

A method for a slave device for calibrating an output timing for transmitting data to a master device is provided. The master and slave devices are communicatively coupled via an interface. The method includes: receiving, from the master device, one or more consecutive first signal edges indicating a synchronization event; recovering a reference clock of the master device based on the one or more consecutive first signal edges; transmitting one or more predetermined second signal edges to the master device and generated using the recovered reference clock; receiving, from the master device, data indicating one or more sampled values of the master device for the one or more predetermined second signal edges; and adjusting the output timing based on a comparison of the one or more predetermined second signal edges and the one or more sampled values of the master device for the one or more predetermined second signal edges.

A digital processing system including a master chip having a first clock pin and a first data pin and a first slave chip having a second clock pin and a second data pin may be provided. The digital processing system may transmit first data from the master chip to the first slave chip based on a synchronous scheme in which a first clock signal output from the master chip via the first clock pin and the first data output from the master chip via the first data pin are provided together and the first data is transmitted in synchronization with the first clock signal, and may transmit second data from the first slave chip to the master chip based on an asynchronous scheme in which the second data output from the first slave chip via the second data pin is transmitted regardless of the first clock signal.

A monitoring device includes: an acquisition unit for acquiring a clock signal output from a communication circuit that outputs the clock signal; and a monitoring unit for analyzing the waveform of the clock signal acquired by the acquisition unit, based on a predetermined reference clock signal having a period equal to or shorter than a period of the clock signal to thereby determine whether or not there is a sign of malfunction in the communication circuit.

A data transmission method includes receiving, by an optical line terminal (OLT) from an optical network unit (ONU), uplink burst data that includes a synchronization data block and a payload, where the synchronization data block includes first synchronization data, wherein the first synchronization data includes a first preamble and an ONU identifier, and a first bandwidth occupied by the first frequency distribution of the first synchronization data is narrower than a second bandwidth occupied by the second frequency distribution of the payload, and obtaining, by the OLT from the first synchronization data, the ONU identifier.