89 results about "Random subspace method" patented technology

The present invention discloses a random access method and system. Wherein, the random access method includes the following steps: a radio access network element uses system information or paging information to indicate the random access resources allocated for a predetermined service to a terminal of the predetermined service, wherein, the random access resources comprise a dedicated preamble in a shared Physical Random Access Channel (PRACH) and/or a dedicated PRACH, and the configuration information of the dedicated PRACH and that of the shared PRACH are indicated in different system information or paging information respectively; and the terminal of the predetermined service uses the random access resources to perform random access. With the present invention, the impact on other ordinary service terminals due to the service requirements of the predetermined service is avoided.

The invention relates to the technical field of the random access of wireless communication, in particular to a random access method in a long term evolution (LTE)-A system. The random access method comprises the following steps of: sending random access lead codes to a resident cell base station and a candidate service cell base station by edge user equipment; when random access response is received in a specified time window, sending a MSG 3 message to the corresponding base station; after the edge user equipment sends the MSG 3 message, judging whether a competitive solution message is received within preset time or not by the edge user equipment, if the competitive solution message is received, judging whether an identifier in the competitive solution message is matched with an identifier in the correspondingly-sent MSG 3 or not, and if the competitive solution message is not received, executing the withdrawal process according to the priority level, and issuing an access request to the corresponding base station again; and if the identifier in the competitive solution message is matched with the identifier in the correspondingly-sent MSG 3, sending a hybrid automatic repeat request (HARQ) confirming message to complete the random access. By the method, the success rate of the random access of edge users is improved, and the time delay of the random access is reduced.

The invention provides a random access method and system of a TD-LTE virtual private network based on dynamic priorities. The random access method comprises a leader sequence transmission step, the random access responding step, the MSG3 sending step and the conflict resolving message step. The random access method and system of the TD-LTE virtual private network based on dynamic priorities have the advantages that the method of combining different back off algorithms and the repeated time upper limit is adopted with different priorities to ensure that the average access delay of a high-priority user is short, and the call drop rate of the user is reduced at the same time; the priority classification mode is dynamically selected according to the system load condition to improve the throughput of a system and reduce the call drop rate.

The invention provides a random access method. After sending a random access pilot frequency code on a physical random access channel resource, UE (user equipment) determines a RA-RNTI (random access-radio network temporary identity) as well as a common sub-band and a wireless frame used by a base station for the authorization of a physical downlink control channel PDCCH according to an index number Preamble_id of a sent random access sequence and the index number of a cluster in which a used synchronization sub-band is located, so as to skip to the wireless frame and the common sub-band to monitor a random access response. After receiving the Preamble code sent by the UE, the base station determines a wireless frame and a common sub-band used in sending the random access response based on the same method as the UE. Therefore, the UE supporting a single sub-band working mode is ensured to be able to normally accomplish the random access process, and the random access method is suitable for a wideband access system in which ''UE supporting single sub-band working mode'' is introduced.

The invention provides a random access method. The method comprises steps: orthogonal segmentation is carried out on bandwidth resources of a channel, a basic transmission unit for random access is obtained according to all users in a base station coverage range, and the information of the basic transmission unit is broadcasted to all users; a random access lookup table is initialized, and the information of the random access lookup table is broadcasted to all users; at a transmitting end of the channel, active users obtain channel transmitting signals according to the random access lookup table, the information of the basic transmission unit, the self channel state information and transmission requirements; and at the receiving end of the channel, the base station carries out detection and demodulation on the obtained basic transmission unit receiving signals and pilot signals corresponding to the basic transmission unit, and the number of the active users, the channel state information of the active users and the transmitting information of the active users can be obtained. The base station control and the user access for random access are simple and effective, and the multiple access technology approaching the channel capacity can be made full use of.

The embodiment of the invention discloses a random access method and device, and relates to the technical field of wireless communication. The method comprises the steps: obtaining a selection threshold value of a multi-address random access mode based on the quality of a communication signal according to the target communication business QoS (quality of service); determining a communication signal quality value corresponding to the selection threshold value; judging whether the communication signal quality value is greater than the selection threshold value or not; selecting a non-orthogonal multi-address random access mode for random access if the communication signal quality value is greater than the selection threshold value; and selecting an orthogonal multi-address random access mode for random access if the communication signal quality value is not greater than the selection threshold value. Through the scheme provided by the embodiment of the invention, the method and device can improve the capacity of network access under the condition of meeting the requirements of communication business QoS.

A random access method in a beam division multiple access (BDMA) system including: receiving, by a terminal, a reference signal of at least one beam sector transmitted from an access point (AP) device; estimating, by the terminal, whether the terminal is in a center area of the beam sector provided by the AP device or in the boundary area of the beam sector by using the strength of the reference signal; transmitting, by the terminal, a different preamble to the AP device in accordance with location information of whether the terminal is located in the center area or in the boundary area; and determining, by the AP device, a target beam sector for transmitting information about uplink resources to be used by the terminal, among a plurality of beam sectors on the basis of the received preamble.

The invention discloses a method for diagnosing faults of an analog circuit of multi-fractional order information fusion, belonging to the field of network fault test and diagnosis of the analog circuit. The method comprises the following steps of: A inputting N types of effective sinusoidal excitation signals with different frequencies in series at the input end of a circuit to be tested to obtain an initial dataset; B randomly dividing a sample set into k feature space subsets by adopting a random subspace method; C mapping the feature space subsets into k diverse fractional-order time-frequency spaces by using fractional-order Fourier transform; and D obtaining a final diagnosis result by utilizing the weight of a failure class and fusing the diagnosis results of k basic classifying models, and dynamically updating the weight of the failure class after completing the diagnosis on each batch of test data. The invention improves the difference degree of the feature space subsets, increases complementarity among basic classifiers, combines with the gradual change characteristics of device faults and effectively improves the precision of a diagnosing system.

A random access method and random access system for a terminal in a high-speed mobile environment are provided. Wherein, the method comprises: selecting a random access preamble format according to a preset cell coverage radius target value; judging whether using a restricted set of cyclic shift quantities pre-configured satisfies a requirement of the cell coverage radius target value under the selected random access preamble format; if not satisfying, selecting a cyclic shift quantity which satisfies the requirement of the cell coverage radius target value from a unrestricted set of the cyclic shift quantities pre-configured; and generating a random access signal according to the cyclic shift quantity and a pre-configured mother code, and performing access using the random access signal. Through the above-mentioned technical scheme, the embodiment of the present document provides a more perfect random access method and random access system for a terminal in a high-speed mobile environment.

The invention relates to a random access method and device. The method comprises the following steps: generating configuration information related to a random access physical channel, wherein the configuration information comprises corresponding relation information of a preamble and a physical uplink shared channel group; Wherein the physical uplink shared channel group is applied to a first-steprequest message in two-step random access, and one or more preambles correspond to one physical uplink shared channel group; And sending the configuration information to the user equipment.

The embodiment of the invention provides a random access method, terminal equipment and communication system. The method comprises the steps of determining the current traffic and a traffic threshold value; and determining a random access type according to the relation between the current traffic and the traffic threshold value. According to the method provided by the embodiment of the invention, the terminal equipment can select an appropriate random access type according to the current traffic and the like, thereby avoiding the waste of resources and the delay caused by the situation which is only limited to the type of public enhancement private channels or the type of random access channels, and improving the utilization efficiency of resources.

Embodiments of the present invention provide a random access method and device, wherein the random access method includes: a user equipment sends a scheduling request to a base station; if the number of times the user equipment sends a scheduling request reaches a predetermined number, the user equipment sends a The base station sends indication information, where the indication information indicates that the reason for the user equipment to initiate random access is that the number of sending scheduling requests reaches a predetermined number of times, so that the base station releases resources allocated for the user equipment. By using the technical solutions provided by the embodiments of the present invention, the UE random access time delay can be reduced.

The embodiment of the application provides a random access method and a random access device based on an LTE (long-term evolution) system. The method comprises the steps of: extracting a time domain signal of a random access channel; carrying out spectrum flitting processing on the time domain signal, wherein the spectrum flitting processing comprises calculating spectrum flitting quantity of the time domain signal according to a recursion formula; the spectrum flitting quantity is a complex number comprising a real part and an imaginary part, and achieving random accessing based on the time domain signal after spectrum flitting processing. The embodiment of the application also provides the random access device based on the LTE system. According to the technical scheme, the resource is saved, and the random access efficiency is improved.

The present invention provides a random access method and device. The method is used for a station, and comprises the steps of: distributing assigned uplink carriers used when a terminal initiates anassigned type of random access for the terminal; generating carrier configuration information, wherein the carrier configuration information is configured to show the assigned type and the assigned uplink carrier; sending the carrier configuration information to the terminal to allow the terminal to initiate the assigned type of random access on the assigned uplink carrier when the terminal initiates the assigned type of random access. Therefore, the random access method and device can ensure that the different types of random access can initiate corresponding random access on the uplink carrier with good and stable signals so as to avoid high time delay caused by access failure of the random access and improve the success and the rate of the random access.

The invention discloses a random access method and a random access device, which are used for solving the problems of relatively high signaling overhead and relatively high time delay caused by a random access method in the prior art. In the method, The base station pre-configures an uplink resource for the terminal device to send the random access information. Therefore, the terminal device doesnot need to wait for the base station to send the random access information after returning the random access response. Therefore, the base station can perform random access according to the preamblesequence and the random access information sent by the terminal equipment. and returning a random access response containing the competition solution message to the terminal device, the random accesssuccess of the terminal equipment is notified; Compared with the existing random access method, the waiting time that the terminal equipment must wait for receiving the random access response to sendthe random access information is saved; and the base station also feeds back the feedback competition solution message and the random access response to the terminal equipment, so that the access timeis further saved, and compared with the existing random access process, the process is reduced, the signaling overhead can be reduced, and the time delay is reduced.

The invention provides a random access method, which comprises the following steps: first step that: the district grade of each district for a plurality of districts is determined, districts are partitioned from the first grade district to the Nth grade district, wherein, N is an integer bigger than one; second step: when the user sends an access inquiry, the district grade that the user belongs to is determined; and the third step: according to the district grade of the determinate district and the prearrange rules, a random access list is sent to the user in the district. The invention also provides a random access system. Through the above technical program, the invention achieves the following beneficial effects that adopting different random access list to different district through partitioning the district, so the time-frequency resource utilization is improved, the random access speed is improved, and the whole performance of the system is also improved.

A prioritized random access method, a resource allocation method, and a collision resolution method are proposed for wireless communication devices with different priority levels pre-assigned according to their respective service requirements. In the prioritized random access method, different priorities are assigned to connection requirements of wireless communication devices according to their respective service characteristics. Collision resolution mechanisms of the prioritized random access method enable establishing connections of different service requirements such as time strict, delay tolerant, and normal user service. The resource allocation method allows different types of contention accesses have different collision opportunities and connection setup delays, and also enables dynamical adjustment in resource allocation according to practical application requirements, the number of MTC devices and system loading. Thus, resource utilization rate of the overall wireless communication network is enhanced.

The invention discloses a random access method for multi-antenna wireless communication system. The method comprises the steps that a multi-antenna base station distributes a section of virtual carrier sub-time slot to each random access terminal with a need in each downlink channel time slot; in the virtual carrier sub-time slot, the base station forms a transmitting beam for each distributed terminal of a next uplink channel time slot, and transmits a virtual carrier signal by using the transmitting beam; and each random access terminal with the need judges whether a chance is provided to access the next uplink channel time slot by monitoring and detecting the virtual carrier signal. According to the method, in the case of not interfering distributed users, the random access terminals with the needs share the uplink channel time slot, and thus the system capacity is improved; compared with the traditional terminal random access method, the method provided by the invention allow each uplink time slot to serve as a random access time slot, so that the quantity of random access time slot resources is greatly increased, the utilization rate of the resources is high, and the time delay of random terminal access is short; the method can meet the large-scale access requirements of mass wireless terminals in future 5G.

The invention relates to the technical field of dam operation safety monitoring and management, in particular to a dam and foundation elastic modulus dynamic inversion method based on prototype vibration response. The method comprises: based on actual measurement vibration response of a dam prototype, a random subspace method based on singular entropy order determination is adopted to identify working modal parameters of a dam in the operation period, a response surface model between a high arch dam and foundation subarea elastic modes and modal parameters is constructed based on the responsesurface theory, and the response surface model is used for replacing a finite element model; based on modal parameters of prototype actual measurement response recognition and modal parameters calculated by a response surface model, an optimal mathematical model of dam and foundation subarea elastic mode dynamic inversion is established, the mathematical model is subjected to optimization solvingby adopting a genetic algorithm, and an optimal combination of elastic modes of all subareas is obtained through inversion; The method provides a brand new idea for inversion of the running period damand the foundation subarea elastic model.

The invention discloses a customer classification method and device based on cost sensitivity and semi-supervised classification, and the method comprises the steps: obtaining a data set L with a class label, a data set U without class label, and a test set Test; employing a random subspace method for the data set L with the class label and the data set U without class label, and training N basicclassification models CS; employing the N basic classification models CS for the classification of the samples in the test set Test, and obtaining N intermediate classification results R1, R2,..., RN;carrying out the majority voting integration of N intermediate classification results R1, R2,..., RN, and obtaining a final classification result. The method combines cost sensitivity learning, semi-supervised classification and random subspace, can achieve the processing of data of the imbalanced types in a better way through the cost sensitivity learning, also can achieve the utilization of a large amount of information in the samples without the class label through semi-supervised learning, also can improve the target customer selection performance of a model through the random subspace, and obtains the better target customer selection performance.

The invention discloses a random access method and device. The method comprises the following steps of receiving a system synchronization signal and a system key information which are sent by a base station through broadcasting, wherein the system key information at least comprises physical random access channel resources available in the system, a preamble sequence pool, and a user equipment (UE)ID code length and a spread spectrum sequence pool which are included in a random access request data packet; sending the random access request data packet to the base station based on the system synchronization signal and the system key information; and receiving a random access response message and uplink transmission resource allocation information which are returned by the base station. The technical problem that the time delay is large due to the fact that a random access process needs to be achieved through four steps in the prior art is solved.

A method and system for using data mining to produce hidden insights from a given set of data. The system reads data, automatically preprocesses the data and generates deep hidden insights based on a preprocessed data. The hidden insights are generated using a suitable combination of at least two of an evolutionary method, a separate and conquer method, and a random subspace method. The system further prioritizes the insights, based on goodness metrics, and generates an optimal list of insights.

The invention belongs to the field of communication technology, and particularly to a weak OFDM subcarrier number estimation method based on random resonance. The method comprises the steps of settinga sampling frequency, wherein the sampling frequency is N times of a lowest sampling frequency, wherein N is not less than 50; selecting a bistable random resonance system parameter; for aiming at asignal which passes a bistable random resonance system, calculating a cepstrum and/or performing Haar wavelet transformation, and calculating an actual subcarrier number. The method of the invention is based on a cepstrum method and a wavelet improvement method. A random resonance method is used for reinforcing the weak OFDM signal. Compared with a traditional method, the weak OFDM subcarrier number estimation method has advantages of increasing an output peak value, improving detecting performance, reducing signal-to-noise ratio threshold, exerting an advantage on the condition of severe channel environment, improving estimation precision, improving algorithm performance for estimating the number of OFDM signal subcarriers to a relatively high extent, performing certain advantage on the condition of low signal-to-noise ratio, realizing better effectiveness and robustness, and performing an important function for restoring information of the OFDM signal on the condition of low signal-to-noise ratio, etc.

The invention provides a random access method and device. The method comprises the following steps: a terminal receives first indication information sent by a network equipment, wherein the first indication information is used for indicating a random access configuration index; the terminal determines a random access resource according to the random access configuration index; a random access resource is determined corresponding to the downlink signal according to an association relationship between the random access resource and the downlink signal; according to the random access resource corresponding to the downlink signal, a random access preamble is sent to the network equipment. The invention realizes the random access configuration index indicated by the network equipment, determines the random access resource, and further determines the random access resource corresponding to the downlink signal according to the correlation relationship between the downlink signal and the random access resource, thereby avoiding the problem that the terminal blindly attempts the random access resource when sending the random access preamble.

The invention belongs to the satellite scheduling field and relates to a relay satellite single-address antenna scheduling random search method based on conflict resolution. The method comprises the following steps: (S1) matching the relay satellite resources for the task according to the alternative service time window information submitted by the task; 12) generating an initial solution of a relay satellite single-access antenna scheduling random search accord to a task resource matching result; (3) evaluating the fitness of the current solution, finding out the key task causing the conflict, and generating a perturbation -deletion pool of the task; (4) randomly perturbing or deleting tasks in the perturbation-deletion pool, and gradually iteratively resolving task conflicts; (S5) updating resource and task sets: deleting the resource and task without conflict and updating the resource and task set. The method of the invention has high speed, is suitable for large-scale relay satellite dispatching scene, adopts double iterative structure, and generates a dispatching scheme with high quality.

The invention provides a random access method and device. The method comprises the steps of detecting an instruction of returning to a physical random access channel during public enhanced dedicated channel; judging whether the transmitting power parameter of sending a precursor in public enhanced dedicated channel access the last time is greater than a threshold parameter; if the transmitting power parameter of sending a precursor in public enhanced dedicated channel access the last time is greater than a threshold parameter, sending a precursor at the physical random access channel with the power corresponding to the threshold parameter. The technical solution can reduce the interference of UE to other users in a community and increase the UE random access efficiency.

The invention discloses a method for predicting a terrorist attack based on the stochastic subspace. The method comprises a first step of establishing a training set, and maintaining a linear classifier Wt by an online learner; a second step of counting the number z of terrorist attack events happening in a country in the next month of the month in a GTD database; step 3: randomly selecting s groups of feature subsets from overall features of a given terrorist attack data set using a stochastic subspace method and generating s base classifiers in an integrated classification algorithm of a kernel extreme learning machine; a fourth step of putting the S groups of feature subsets into the kernel extreme learning machine for learning to obtain output results; a fifth step of integrating the outputs of the s base classifiers to obtain a final classification result; and a sixth step of performing model application: inputting the value of an independent variable for each record in a test set to obtain the value of a predictive variable, that is, the probability of a terrorist attack event happening in the next month.