Abstract: This disclosure above describes a method, a device, and a system for encrypting/decrypting physical channels in a wireless communication network. Among various embodiments are: pre-allocating a key, dynamically granting a key, encrypting the physical channel based on key in various levels, dividing the spectrum into two categories, or dividing a network into an initial access network and a private network. In one embodiment, a method for physical channel encryption is disclosed. Performed by a UE, the method may include obtaining a first key for decrypting a first physical channel, the first physical channel being encrypted; and decrypting the first physical channel based on the first key to obtain a signal or data transmitted by a first network element, the signal or the data being carried in the first physical channel.

Abstract: A user selection method includes: acquiring user feature information; determining user association information according to the user feature information; and selecting users according to the user association information and a preset condition.

Abstract: A method and apparatus for data retransmission in a wireless communication network, specifically, for a data packet generation before retransmission, according to available resources, link status, and the like is disclosed. In one embodiment, a method for a data packet retransmission by a wireless communication device, includes: receiving first information from a wireless communication node, wherein the first information comprises a first indicator; and performing a data packet retransmission with a data packet generation according to the indicator.

Abstract: The present invention discloses a display panel and an electronic terminal. The display panel includes a first display region and a second display region. The second display region includes a plurality of display subregions. Each of the plurality of display subregions includes a display portion and a light-transmitting portion. Each of the plurality of display subregions includes a switch control unit, a liquid crystal layer, a transparent electrode group, and a color filter layer. The liquid crystal layer is disposed in the display portion and the light-transmitting portion. The transparent electrode group is configured to control a deflection direction of liquid crystal molecules in the liquid crystal layer, which puts the light-transmitting portion in a light-transmitting state or an opaque state.

Abstract: Provided are a channel state information transmission method, a channel state information receiving method, a signaling information transmission method, a node and a medium. The channel state information sending method is applied to a first communication node and includes the following. M downlink measurement reference signal resources are determined, where M is a positive integer greater than 1; one set of channel state information is determined according to the M downlink measurement reference signal resources; and the one set of channel state information is sent.

Abstract: A method for determining a quasi-co-location (QCL) relationship, applied to a first node, including: acquiring indication information; determining the QCL relationship between a first reference signal and a second reference signal according to the indication information; where the indication information includes QCL association information, first time window information and second time window information; the QCL association information includes the first reference signal having the QCL relationship with the second reference signal, and a QCL type.

Abstract: Provided is an information transmission method, apparatus and system. The information transmission method includes: obtaining, by a first communication node, a control channel description list which includes description information of N control channels, where N is a positive integer and the description information of each of the control channels includes one or more of: control channel configuration information, reference signal configuration information, link resource configuration information, operating bandwidth configuration information, puncturing configuration information, frequency hopping configuration formation, transmission time interval length configuration information, power control configuration information and beam configuration information; and sending, by the first communication node, the control channel description list to a second communication node.

Abstract: Embodiments of the present disclosure provide a multi-user detection method and apparatus for cell-free Multiple-Input Multiple-Output (MIMO). The method includes: receiving, by a Central Processing Unit (CPU) of a cell-free MIMO system, an MRC merged data symbol stream SMRC=HHY of K users transmitted by an Access Point (AP), and multiplying SMRC by a conjugate transpose matrix SMRCH of SMRC to obtain a K*K matrix SMRCSMRCH; and performing singular value decomposition on the matrix SMRCSMRCH to obtain a unitary matrix V and a diagonal matrix A, obtaining a diagonal matrix A according to the diagonal matrix A, and estimating sending-end data symbols of the K users by a formula {tilde over (S)}=V?VHSMRC.

Abstract: A low density parity check encoding method, including: determining a target parity check matrix, where the target parity check matrix belongs to a second parity check matrix set, and a base graph of the second parity check matrix set is extracted from a base graph of a first parity check matrix set and performing low density parity check encoding on data to be transmitted according to the target parity check matrix and a target lifting size.

Abstract: Methods, systems, and devices for configuring user plane functions in mobile communication technology are described. An exemplary method for wireless communication includes determining, at a network node, a processing order for processing a plurality of user plane functions based on at least one of a type of service, a deployment type, a connection mode, one or more capabilities of the network node, or one or more capabilities of a wireless device, and transmitting, to the wireless device, a first control plane message comprising the processing order. Another exemplary method for wireless communication includes receiving, from a network node, a first control plane message comprising information that includes a processing order for processing a plurality of user plane functions, and processing, at the wireless device, a plurality of user plane functions based on the processing order.

Abstract: This document generally relates to use of non-coaxial estimation and compensation for orbital angular momentum (OAM) communication. The transmitting node may transmit an OAM signal to a receiving node. A non-coaxial parameter estimation node may determine one or more non-coaxial parameters according to the OAM signal. The transmitting node and/or the receiving node may perform beam forming and/or channel compensation based on the non-coaxial parameters.

Abstract: Provided are a data modulation method and apparatus, a device, and a storage medium. The data modulation method comprises: modulating data according to a configured constellation point modulation symbol S(n) set, wherein n is an integer between 0 and N?1, and N is an even integer greater than or equal to 4; and transmitting the modulated data on a physical resource.

Abstract: Provided is an information transmission method, apparatus and system. The information transmission method includes: obtaining, by a first communication node, a control channel description list which includes description information of N control channels, where N is a positive integer and the description information of each of the control channels includes one or more of: control channel configuration information, reference signal configuration information, link resource configuration information, operating bandwidth configuration information, puncturing configuration information, frequency hopping configuration formation, transmission time interval length configuration information, power control configuration information and beam configuration information; and sending, by the first communication node, the control channel description list to a second communication node.

Abstract: A data transmission method includes: performing M-point discrete Fourier transform (DFT) on first time domain data to obtain frequency domain data; performing a filtering operation on the frequency domain data to obtain filtered frequency domain data; performing N-point inverse discrete Fourier transform (IDFT) on the filtered frequency domain data to obtain second time domain data; and transmitting the second time domain data on a physical resource.

Abstract: Provided are a power control method and apparatus, a communication node, and a storage medium. The power control method includes: acquiring initial power control information, where the initial power control information includes a power control parameter of each of access points (APs) providing a service for each of terminals, the number of the terminals is K, K is an integer greater than 1, the number of the access points is M, and M is an integer greater than 1; determining SINR of the K terminals according to the initial power control information and determining L target SINRs, where L is a positive integer; and adjusting a power control parameter of a target AP according to the SINRs of the K terminals and the L target SINRs until an iteration adjustment stop condition is satisfied, and an adjusted power control parameter is obtained.

Abstract: Provided are a signal transmission method and apparatus, an access point, a processing unit, a system, and a medium. The signal transmission method includes, according to the channel estimation of a current AP, determining a multi-user uplink data signal and a first inter-user interference information matrix which correspond to the current AP; and transmitting the multi-user uplink data signal and the first inter-user interference information matrix to the next-stage node of the current AP in a front-haul link.

Abstract: A method for characterizing graphene on a platinum substrate, including: coating a methylene blue developing solution to a platinum substrate having a surface covered with graphene, so that the methylene blue developing solution reacts with hydrogen-containing gas under catalysis of platinum to yield colorless methylene white; after the pressure is restored, methylene white in the exposed area of platinum substrate will quickly turn blue when it is oxidized into methylene blue by reacting with oxygen in the air under catalysis of platinum. Thus, color difference can be formed to facilitate the observation of the graphene. The characterization method is highly reproducible and simple, and can be used to characterize graphene with a large area on a platinum substrate. The characterization method does not damage the graphene and platinum substrate, has no negative impact on the quality of graphene, and the platinum substrate can be recycled to reduce costs.

Abstract: Methods, apparatus, and systems for reducing Peak Average Power Ratio (PAPR) in signal transmissions are described. In one example aspect, a wireless communication method includes determining, for a time-domain sequence x(i), an output sequence s(k). The output sequence s(k) is an inverse Fourier transform of a frequency-domain sequence S(j), and S(j) represents a dot-multiplication of a frequency-domain sequence Y(j) corresponding to the time-domain sequence x(i) and a frequency-domain sequence Z(j) corresponding to a three-coefficient function associated with 2 2 , 1, and 2 2 . The method also includes generating a waveform using the output sequence s(k), where i is from 0 to I?1, j is from 0 to J?1, k is from 0 to K?1, and I<J<=K.

Abstract: Provided are a data transmission method and apparatus, a device, and a storage medium. The method is applied to a first node. The method includes, in the case where the first node is in a connected state, receiving first-node-specific signaling, where the first-node-specific signaling carries idle-state transmission configuration information; and in the case where the first node is in the idle state, performing data transmission with a second node according to the idle-state transmission configuration information.

Abstract: A signal transmission method includes: sending, by a first communication node, system information, where the system information includes configuration information of at least one physical random access channel (PRACH), a PRACH is associated with at least one synchronization signal group, and the synchronization signal group includes a plurality of synchronization signals; receiving, by the first communication node, a random access preamble sent by a second communication node according to the system information; and sending, by the first communication node, a response message for the random access preamble in a preset time window.