166 results about "Slice selection" patented technology

The embodiment of the invention discloses a network slice selection method, UE, MME and a system, which relates to the field of communication and is used for realizing network slice selection without adding new network elements. The network slice selection method comprises the steps that the UE receives network slice information sent by the mobile management entity MME from eNodeB, wherein the network slice information indicates the network slice type supported by the network side; the UE selects the corresponding network slice according to the network slice information and the own service type; and the UE forwards request information to the MME through the eNodeB to determine whether the UE is allowed to access the corresponding network slice after the authentication of the MME, wherein the request information indicates the corresponding network slice. The embodiment of the present invention is applied to 5G network slice selection.

The embodiments of the present application relate to a method for registeration and session establishment, a terminal, and an AMF entity. The session establishing method includes stesp that aterminalsends a first message to an access and mobility management function AMF entity, where the first message includes first information, first network slice selection information, and second network sliceselection information, the first information includes information of requesting establishment of a protocol data unit PDU session, the first network slice selection information is used by the AMF entity to select a first session management control function SMF entity, and the second network slice selection information is used by the AMF entity to select a second SMF entity; and the terminal receives a second message sent by the AMF entity, wherein second message includes second information, and the second information includes information that the PDU session establishment accepts. In order toestablish a PDU session establishment process, the AMF entity accurately determines the S-NSSAI and completes the establishment of the PDU session.

The invention discloses a network slice selection method, a terminal access strategy generation method and a network node. The strategy generation method comprises the following steps that a CEP obtains information of business requirements of a terminal under different work modes and information of business requirements which can be met by different network slice types and generates a terminal access strategy, wherein the terminal access strategy includes correspondence between the work modes of the terminal and the network slice types. The network selection method comprises the following steps that the CEP obtains the current work mode of the terminal, determines or obtains the network slice type corresponding to the current work mode according to the terminal access strategy and queries an NSMF to obtain information of a target network slice of the terminal. The invention also provides the corresponding network node. According to the network slice selection method, the strategy generation method and the network node, the appropriate network slice can be selected to provide the services for the terminal according to the terminal access strategy, so that the differentiated business requirements of the terminal are met, and the user experience is improved.

The embodiment of the invention provides a network slice selection method, device and network architecture, and the technical problem that a network slice cannot be flexibly selected in the prior artis solved. The method includes the steps of using a slice selection control function to acquire one or more items of a slice selection strategy, user subscription information, network slice selectionassistance parameters and the user context; the slice selection control function determining network slice selection information according to the one or more items of the slice selection strategy, user subscription information, network slice selection assistance parameters and the user context, sending the determined network slice selection information to the slice routing function, so as to enable the slicing routing function to execute signaling or data routing (signaling is 5G control signaling), and the data is sent by a user, such as internet surfing data, internet of things data and thelike ). The technical problem that a network slice cannot be flexibly selected in the prior art can be solved.

The invention provides a network slice selection method and device. The method comprises the steps that a terminal sends a service request to a network side, wherein the service request carries the service type or service description information of a to-be-conducted service and is used for indicating the network side to select a network slice; the terminal receives an information list of the network slice which is determined by the network side and corresponds to the service type; the terminal determines a selection decision for indicating network slice selection according to the received information list; and the terminal sends network slice indication information selected according to the selection decision to the network side, wherein the network slice indication information is used for indicating location index information of the network slice in the information list or an identity (ID) of the network slice. According to the network slice selection method and device, the problem that in the prior art, network slice selection cannot be conducted is solved, and a blank in the related technique is filled.

In a method and MRI apparatus for the minimization of streak artifacts in modular k-space scanning in magnetic resonance imaging, an odd integer k-space scanning module number N_φ=2n+1 is defined that defines the number of incrementally rotated repeated modules of the k-space scanning process, a slice selection gradient selects any slice in the range of the object to be examined, and data for all N_φ angle-oriented k-space scanning modules in the selected slice acquired such that each k-space scanning module has an azmuthal distance of $\frac{\Delta \phi }{2}=\frac{360°}{2N_{\phi }}$

from both adjacent projections, with the direction of the scanning of the adjacent k-space scanning modules alternating.

The embodiment of the application relates to registration and session establishment methods, a terminal and an AMF (Access and Mobility Management Function) entity. The session establishment method comprises the following steps that: a terminal sends a first message to the AMF entity, wherein the first message includes first information, first network slice selection information and second networkslice selection information, the first information includes information for requesting the establishment of a protocol data unit (PDU) session, the first network slice selection information is used by the AMF entity to select a first session management control function (SMF) entity, and the second network slice selection information is used by the AMF entity to select a second SMF entity; and theterminal receives a second message sent by the AMF entity, wherein the second message includes second information, and the second information includes information accepted by PDU session establishment. Through adoption of the registration and session establishment methods, the AMF entity can accurately determine S-NSSAI (Single Network Slice Selection Information) during establishment of the PDUsession in order to completes the establishment of the PDU session.

A method of steady-state free precession MR imaging is provided that includes the steps of: (a) providing a balanced steady-state free precession imaging sequence that includes a plurality of phase encoding steps, wherein each phase encoding step comprises a phase encoding gradient and a slice selection gradient; and (b) acquiring imaging data by performing the plurality of phase encoding steps in sequence, wherein the imaging data is acquired is compensated for one or more effects due to eddy-currents, flow, or motion related artefacts due to the implementation of one or more artefact compensation strategies that consist of (i) “pairing” of consecutive phase encoding steps and of (ii) “through slice equilibration” of eddy-current and motion or flow related signal oscillations.

In a method for magnetic resonance imaging on the basis of a partially-parallel acquisition (PPA) reconstruction method and a magnetic resonance tomography apparatus, data for at least two two-dimensional slices of a patient are acquired (which two-dimensional slices are displaced in the direction of a slice-selection gradient (z-gradients) defining the slice-normal direction) with at least one data acquisition in k-space (which acquisition forms a partial data set) per slice with a number of component coils, with the sum of all partial data sets forming a complete data set in k-space. The coil sensitivities of each component coil are determined on the basis of the complete data set. At least one partial data set of each slice is completed with a PPA reconstruction method on the basis of the determined coil sensitivities. The completed slices in k-space are transformed into whole images in the spatial domain.

The invention provides a slice information updating method and device. The method comprises the following steps of: when the network slice selection network element determines that the network slice which is not supported by the PLMN is updated to be supported; and sending a notification message to the communication network element, the notification message being used for indicating that the PLMNsupports the network slice, and then the communication network element notifying a terminal which has requested that the network slice fails and signs for the network slice: the PLMN currently supports the network slice. Therefore, the corresponding terminal can know that the PLMN supports the network slice at present.

The present invention relates to a method for selecting a serving AMF of a network node in a wireless communication, and the method may comprise the steps of: receiving a registration request messageof a terminal, wherein the registration request message includes network slice selection assistance information for a slice requested by the terminal and priority information of the NSSAI; determiningwhether the NSSAI is valid for the terminal; when the NSSAI is valid for the terminal, retrieving a first AMF which can support the NSSAI, on the basis of the priority information; and when the firstAMF is retrieved, selecting the first AMF as the serving AMF for serving the terminal, and transmitting the registration request message to the first AMF.

The present invention discloses a network slice selection method, apparatus and system. The invention aims to solve a network slice selection problem in a process where a terminal is connected into a 5G network. The invention includes the following steps that: a control plane function entity receives the connection establishment request of the terminal; and the control plane function entity selects a network slice from at least one network slice configured by the network side for the terminal according to the connection establishment request.

In a magnetic resonance tomography method and apparatus for avoiding peripheral interference signals in magnetic resonance tomography when using spin-echo sequences, the average frequency and the bandwidth of the radio-frequency excitation pulse differ from the average frequency and the bandwidth of the radio-frequency refocusing pulse(s), and the amplitude of the slice selection gradients activated during the radio-frequency excitation pulse differing from the amplitude of the slice selection gradient(s) activated during the radio-frequency refocusing pulse, such that the excitation slice of the RF excitation pulse and the refocusing slice of the RF refocusing pulse(s) in the homogeneous volume (FOV) of the basic magnetic field are superimposed, while the excitation slice of the RF refocusing pulse(s) in the non-homogeneous volume of the basic magnetic field are separated locally, and an echo signal is thereby prevented in the non-homogeneous volume.

Featured are devices for compression of target tissue while magnetic resonance imaging the target tissue and methods and systems related thereto. The method includes disposing target tissue between the fixed surface and the moveable member of a compression device and compressing the target tissue between the fixed surface and the moveable member. The method also includes acquiring one or more, more specifically a plurality, of sequences of image data of the compressed target tissue using an MRI imaging technique (MRI). In particular embodiments, the MRI technique is a SENC MRI technique, where tissue encoding is done prior to compressing the tissue and acquiring includes adding a gradient moment in the slice-selection direction to cause demodulation with a specific frequency. In further embodiments, the sequences of image data are acquired one of during successive periodic compressions of the tissue or successive periodic relaxation of the tissues.

In a method for magnetic resonance imaging, by combined switching of radio-frequency excitation pulses, slice selection gradient pulses, phase-coding gradient pulses and readout gradient pulses, a matrix in the k-space is scanned row-by-row and transformed using a Fourier transformation into a matrix in the spatial domain, with the polarity of the slice selection gradient being inverted during the scanning of the k-matrix, allowing elimination of the ambiguity artifact.

The invention discloses a network slice selection method and a network slice selection device, which are used for selecting a network slice for a terminal without the capability of reporting NSSAI. The method comprises the following steps that an access and mobility management function AMF sends a slice selection request to a network slice selection function NSSF, the slice selection request is used for requesting to select a network slice for a service of a terminal, the slice selection request carries dynamic feature information of the terminal, and the dynamic feature information is used for selecting the network slice; and the AMF receives the identification information of the network slice from the NSSF.

In a magnetic resonance imaging method and apparatus and computer program product, spatial scanning of a block-shaped volume of a patient is undertaken by applying a phase-coding gradient in a slice selection direction, as well as by applying a frequency-coding gradient in a plane vertical to the direction of the phase-coding gradient. The body is uniformly and continuously moved by uniformly and continuously moving a table on which the body is situated until the block-shaped volume moves uniformly through the homogeneity volume of the magnetic resonance apparatus. The gradient fields are simultaneously uniformly continuously shifted in conformity with the motion of the table, so that the block-shaped volume being scanned does not move in relation to the table, and thus does not move in relation to the patient, until the block-shaped volume proceeds through the entirety of the homogeneity volume, and scanning is completed.