Abstract: A method and application of flash imaging lidar to measure the attenuation coefficient of water bodies are provided. In this novel method, the real time remote measurements are achieved on the attenuation coefficient of fresh water using flash imaging lidar based on the adjacent frame difference (AFD) method and water body backscattering model. The method solves the problems of low accuracy and high error of data obtained from real-time remote sensing measurement of attenuation coefficients of water bodies in the prior art; the slow speed of measurement data obtained when measuring water bodies, and the poor feasibility and reliability effect of the remotely measured attenuation coefficients of water bodies obtained. The experimental and theoretical analyses fully illustrate the feasibility of real-time remote sensing measurement of the attenuation coefficient of water bodies using the AFD method, which has a strong practical value.

Abstract: In a data transmission method, a terminal device receives control information, and receives data of a transport block (TB) on a first time-frequency resource; and the terminal devices obtains m code block (CB) groups in the TB, where m is a positive integer, m=min(NCB_re,NGroup_max), NCB_re is a quantity of CBs in the TB, NGroup_max is a maximum value of a quantity of CB groups, each of the m CB groups includes at least one CB, NCB_re is determined based on a TB size TBS and a maximum value of a data size of a CB, and the TBS is determined based on the control information.

Abstract: The present disclosure is related to the content delivery technology and discloses a method and system for scheduling an edge CDN node. The method is applicable to a CDN scheduling center under a 5G network architecture and includes: receiving a terminal request for a target domain name sent by a central layer UPF network element; assigning a target edge CDN node to a terminal according to location information of the terminal carried in the terminal request if the terminal request is an HTTPDNS request; and assigning the target edge CDN node to the terminal according to a source IP address of the terminal request if the terminal request is a conventional DNS request. By adopting the present disclosure, the CDN scheduling center may determine the location information of the terminal under the 5G network architecture, thereby accurately assigning the edge CDN node to the terminal.

Abstract: This application relates to the field of wireless communications technologies, and in particular, to a data processing method, apparatus, and system. This application provides a data processing method. A data sending device modulates a to-be-transmitted bit sequence, splits a real part and an imaginary part of a complex-valued symbol that is obtained through the modulation into two symbols to form a symbol sequence, performs phase rotation of symbols in the symbol sequence, and performs sending by using a single carrier frequency division multiple access (SC-FDMA) symbol. This application is intended to reduce a peak-to-average power ratio (PAPR) of a transmit signal of an orthogonal frequency division multiplexing (OFDM) system by splitting a real part and an imaginary part of a to-be-transmitted signal, and improve link quality of an entire transmission system.

Abstract: The present disclosure relates to sending methods and apparatus. One example method includes receiving first indication information for uplink data transmission, where the first indication information indicates a frequency resource for the uplink data transmission, and the frequency resource includes N subcarriers, and sending an uplink reference signal associated with the uplink data transmission, where a length of a sequence of the uplink reference signal is M, a roll-off factor of a filter for the uplink data transmission is not greater than 2 ? ? M N - 1 , and N/2?M<N.

Abstract: Disclosed is a reference signal transmission method and a device. The method includes converting, by a sending device, a frequency domain reference signal from frequency domain to time domain, to generate a time domain reference signal. The frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource. The reference signal sequence is determined based on a Zadoff-Chu (ZC) sequence, and a length value of the ZC sequence is selected from at least two length values. The method includes sending, by the sending device, the time domain reference signal. According to the reference signal transmission method, one ZC sequence is selected from at least two ZC sequences with different lengths to generate the reference signal sequence, so that the generated reference signal sequence is characterized by a low PAPR and an low RCM, and is used to generate a reference signal, to improve data transmission performance.

Abstract: This application discloses a wireless communication method, a wireless communications apparatus, and a wireless communications system.

Abstract: This application proposes a reference signal transmission method and a device. The method includes: converting, by a sending device, a frequency domain reference signal from frequency domain to time domain, to generate a time domain reference signal, where the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource group, the reference signal sequence is related to a Zadoff-Chu sequence and a length of the reference signal sequence, and a length value of the Zadoff-Chu sequence is greater than a quantity of minimum time-frequency resource units included in a maximum frequency domain resource that can be allocated; and sending, by the sending device, the time domain reference signal. According to the reference signal transmission method in this application, a performance requirement on a PAPR/RCM of a reference signal can be met, a quantity of blind reference signal detection times can be reduced, and system performance can be improved.

Abstract: Embodiments of the present disclosure disclose a signal transmission apparatus and non-transitory computer-readable storage medium, and relate to the field of communications technologies. The apparatus comprises a memory storing program instructions and a processor coupled to the memory, wherein the program instructions, when executed by the processor, cause the apparatus to obtain configuration information for use to transmit a signal of a second carrier in coverage space of a first carrier, a spectrum occupied by the first carrier and a spectrum occupied by the second carrier overlap, and a subcarrier of the first carrier and a subcarrier of the second carrier are orthogonal; and transmit the signal of the second carrier according to the configuration information.

Abstract: In a data transmission method, a terminal device receives control information, and receives data of a transport block (TB) on a first time-frequency resource; and the terminal devices obtains m code block (CB) groups in the TB, where m is a positive integer, m=min(NCB_re,NGroup_max), NCB_re is a quantity of CBs in the TB, NGroup_max is a maximum value of a quantity of CB groups, each of the m CB groups includes at least one CB, NCB_re is determined based on a TB size TBS and a maximum value of a data size of a CB, and the TBS is determined based on the control information.

Abstract: The present disclosure is related to the content delivery technology and discloses a method and system for scheduling an edge CDN node. The method is applicable to a CDN scheduling center under a 5G network architecture and includes: receiving a terminal request for a target domain name sent by a central layer UPF network element; assigning a target edge CDN node to a terminal according to location information of the terminal carried in the terminal request if the terminal request is an HTTPDNS request; and assigning the target edge CDN node to the terminal according to a source IP address of the terminal request if the terminal request is a conventional DNS request. By adopting the present disclosure, the CDN scheduling center may determine the location information of the terminal under the 5G network architecture, thereby accurately assigning the edge CDN node to the terminal.

Abstract: Embodiments of the present disclosure relate to a data transmission method and a communications device. The method includes: performing an interpolation operation on a first signal sequence to obtain a second signal sequence, where a length of the second signal sequence is greater than a length of the first signal sequence; mapping the second signal sequence onto a subcarrier to obtain a second signal sequence that is on the subcarrier; performing an inverse fast Fourier transform (IFFT) on the second signal sequence that is on the subcarrier, to obtain a time-domain signal, and transmitting the time-domain signal. According to the embodiments of the present disclosure, a delay deviation can be better resisted.

Abstract: In a data transmission method, a terminal device receives control information, and receives data of a transport block (TB); and the terminal devices obtains m code block (CB) groups in the TB, where m is a positive integer, m=min(NCB_re, NGroup_max), NCB_re is a quantity of CBs in the TB, NGroup_max is a maximum value of a quantity of CB groups, each of the m CB groups includes at least one CB, NCB_re is determined based on a TB size (TBS) and a maximum value of a data size of a CB, and the TBS is determined based on the control information.

Abstract: Example spectrum sharing methods and apparatus are described. One example method includes acquiring a cycle period of a shared frequency between a first system and a second system. Time slice allocation information of the cycle period is obtained and sent to a user equipment.

Abstract: An apparatus is configured to perform a method for user equipment (UE) offloading. The method includes receiving, at a network controller, a measurement report from a UE, the measurement report radio link measurement quantities of a serving cell and one or more candidate serving cells, the measurement quantities measured after interference cancellation or suppression. The method also includes, based in part on the measurement report from the UE, determining whether to offload the UE to a second cell among the one or more candidate serving cells.

Abstract: Embodiments of the present disclosure provide a data processing method and apparatus. The method includes: preprocessing, by a transmit end, data transmitted on at least two first-type symbols in a radio frame that are parallel, and converting the data transmitted on the at least two parallel first-type symbols into data transmitted on a shared symbol; adding, by the transmit end, a first CP to the data transmitted on the shared symbol; and sending, to a receive end, the data that is transmitted on the shared symbol and to which the first CP is added.

Abstract: Embodiments of the present invention disclose a reference signal transmission method. A transmitting apparatus multiplies M first symbol sequences by M coefficients respectively to obtain M second symbol sequences, where M is a positive integer greater than 1, the symbol sequence includes L symbols, L is a positive integer greater than 1, and the M coefficients each have a magnitude of 1. The transmitting apparatus maps the M second symbol sequences onto a first time-frequency resource to obtain a frequency domain signal. The transmitting apparatus performs an IFFT operation on the frequency domain signal to obtain a time domain signal. And the transmitting apparatus sends the time domain signal.

Abstract: In certain embodiments, a method includes generating a first signal and a second signal. The first signal includes at least one first sub-signal, and the second signal includes at least one second sub-signal. A subcarrier frequency spacing of the first sub-signal is M times as large as a subcarrier frequency spacing of the second sub-signal. The method further includes separately sending each first sub-signal and each second sub-signal. In a range of a first preset frequency apart from a reference subcarrier frequency, all the second sub-signals sent on a subcarrier corresponding to a subcarrier frequency whose difference from the reference subcarrier frequency is a non-integer multiple of the subcarrier frequency spacing of the first signal are zero signals. The reference subcarrier frequency is a subcarrier frequency of the first sub-signal adjacent to the second signal in a frequency domain.

Abstract: A transmitter, comprising a processor adapted to convert a primary sequence of modulation symbols into a primary signal, using a primary pulse shape, convert an auxiliary sequence of modulation symbols, created from the primary sequence, to an auxiliary signal using an auxiliary pulse shape and create a joint output signal based on the primary signal and on the auxiliary signal.

Abstract: Method disclosed is applied to an OFDM wireless transmission system which includes at least two OFDM symbols, and includes: adding a zero power padding ZP to a tail end of each of the at least two OFDM symbols; adding data of Nw consecutive points at one end of a first OFDM symbol of the at least two OFDM symbols to the ZP at the other end of the first OFDM symbol, so that the data of the Nw points is a prefix and/or a suffix of the first OFDM symbol, where the first OFDM symbol includes data of N points, N>Nw; and performing point multiplication processing with symmetric time domain window function on the data of the Nw points at the two ends of the first OFDM symbol to which the prefix and/or the suffix is added, so that a sum of point coefficients corresponding to the symmetric time domain window function is 1.