53results about How to "Increase the number of access" patented technology

The invention discloses an intelligent water resource control platform based on cloud computing and an expert system. The platform comprises a site measurement and control station, an internet of things data transmission system and a cloud computing service platform, and is characterized in that the control platform carries out automatic real-time collection on water resource information of a water supply water source, underground water, a water intake, a boundary control fracture surface and a sewage draining exit and site equipment operating condition information through the site measurement and control station, and real-time data preprocessing is achieved by means of an additionally installed site intelligent controller; internet of things data transmission equipment is adopted in the internet of things data transmission system to sent data of the measurement and control station to the cloud computing platform, and data support is provided for water resource management and advanced applications; the cloud computing service platform achieves real-time monitoring on water resources, monitoring on operating condition and remote on-line maintenance on site monitoring equipment and applications on water resource service, and a water resource decision is utilized to support the expert system to achieve assessment, early warning and emergency commanding of the water resources. The cloud computing and the Internet of things technology are applied to the platform, so measurement and control data are timely and efficiently processed, the intelligent computing technology is applied so that intelligent assessment and early warning of the water resources can be achieved, and safety of the water resources is guaranteed to a great extent.

The invention discloses a random access method. The method comprises the following steps: sending access request information by a receiving terminal at a network side, wherein the access request information comprises a lead code and a sub-identifier; according to the lead code and the sub-identifier, identifying the terminal; and when the terminal is successfully identified, accessing the terminal. The method effectively reduces the collision probability, improves the accurate accessing rate of the terminal and increases the access number of the terminals which a cell can support. The invention also discloses a random access system, the terminal and access equipment at the network side.

A network system of light without light source based on the wavelength division multiplexing technique includes a plurality of optical line terminals which adopt uplink wavelength and downlink wavelength that are mutually independent, a wavelength division multiplexing / demultiplexer connected with the plurality of optical line terminals, a wavelength division multiplexing multiplexer connected with the wavelength division multiplexing / demultiplexer by optical fiber, and a plurality of optical splitters which adopt the same uplink wavelength and the same downlink wavelength corresponding to the optical line terminals and are connected with the wavelength division multiplexing multiplexer. A plurality of optical network units optically connected with the optical splitters. The invention realizes optical fibre communication among a plurality of optical line terminals and a plurality of optical network units through a single optical fibre, thus saving the optical fibre resources for the connecting section between an MAN and a district and reducing the cost of optical fibre access. When the network bandwidth is updating, alteration on the updating of the network bandwidth can be realized only by increasing the qualities of the accessed optical network line terminals and corresponding optical splitters, thus greatly reducing the alteration cost.

The invention relates to a mixed type passive optical network system which comprises a plurality of optical line terminals, a coarse wavelength division multiplexing and demultiplexing device, an optical branching device, and a plurality of optical network units, wherein, each optical line terminal occupies two different wavelengths of coarse wavelength division multiplexing standards, and the two different wavelengths are respectively used for transmitting optical signals of a transmitting end and a receiving end of the optical line terminal; the optical branching device is provided with a plurality of ports and connected with the coarse wavelength division multiplexing and demultiplexing device through an optical fiber; the network units are connected with corresponding ports of the optical branching device through optical communication. The invention adopts mature coarse wavelength division technologies to make a plurality of mutually independent EPON systems enter into a single optical fiber through simultaneous superposition of different CWDM optical wavelengths and simultaneously be shared by each ONU through the optical branching device. By adoption of the topological structure, the invention has the advantages of great conversation of optical fiber resources connected between metropolitan area networks and cells, simultaneous further exertion of EPON advantages, capability of flexibly increasing user number, reduction of cost of each line, and acceleration of promotion of an EPON network.

The invention discloses an airport array communication non-orthogonal multiple access uplink transmission method, and belongs to the technical field of the airport communication. The method comprisesthe following steps: firstly constructing a communication scene, performing millimeter wave directional communication between a ground base station and each airport base station to obtain a channel response vector; selecting the channel response vector on the strongest path of the airport base station as the effective channel response vector hi of the ground base station and the airport base station I; ranking effective channel gains as shown in description of various airport base stations by using the beamforming vector w; for the effective channel gain ranking as shown in description, preferably decoding and removing a transmitting signal s1 by the ground base station, and then decoding the transmitting signal s2 to obtain an achievable rate of each airport base station; when the sum ofthe achievable rates achieve the maximum, designing a constraint condition needing to be satisfied by joint optimal power control and beamforming; solving the constraint condition to obtain power distribution corresponding to each airport base station and a beamforming scheme of the ground base station. The spectrum efficiency is effectively improved, the computation complexity is low, and the fast beamforming and power control are realized.

The invention discloses a method for realizing network service proxy based on an IOCP mechanism. The method comprises the following steps of: client requests are accessed through an IOCP; a proxy server performs filtration processing on the accessed client requests; and the proxy server distributes the filtered client requests to the least-loaded server for processing by utilizing a load balancing algorithm. By applying the method provided by the present invention, not only is the accessing quantity of the terminal users increased, but also the accessing quantity of the servers is increased and can be expanded at any time according to the need.

The invention discloses a physical layer active monitoring method for a non-orthogonal multiple access system. A power domain non-orthogonal multiple access method is adopted for transmission. After each suspicious receiver module receives the composite signal, the suspicious receiver module carries out detection according to a serial interference elimination mode; the active monitor module worksin a full-duplex mode, and sends an interference signal to the suspicious receiver module while receiving the composite signal; after receiving the interference signal, the suspicious receiver modulechanges the sending rate of the suspicious sender module; the active monitor module detects the received composite signal by adopting a serial interference elimination method; the average monitoring and rate is calculated, the optimization problem is established, the maximum average monitoring and rate is obtained by adjusting the interference power sent by the active monitor module, the monitoring effect better than that of passive monitoring is obtained by controlling the sending power of the active monitor, and the safety of the system is improved.

The invention discloses a non-orthogonal multiple access downlink transmission method for a space array communication, and belongs to the technical field of space communication. The method comprises the following steps of: firstly, constructing a communication scene, the ground base station superimposes and transmits signals transmitted by the space base station, and superposed signals form a mixed signal; performing a millimeter wave directional communication between the ground base station and each of the space base stations to obtain a channel response vector corresponding to each space base station; selecting the channel response vector on the strongest path of the space base station as a valid channel response vector; making the appropriate sort of the effective channel gain by usingthe beamforming vector w, in connection with |h<1><H>w|<2> is greater than or equal to |h<2><H>w|<2>, a space base station 1 decodes to transmit a signal s2 and eliminates and re-decodes to transmit signal s1, the space base station 2 decodes to transmit a signal s2 and obtains the reachability of each space base station, when the sum of reachability is maximized designing the condition of constraints that the joint power allocation and beamforming need to meet, and solving the condition of constraints to obtain a scheme of power distribution corresponding to each space base station and a beamforming of the ground base station. According to the non-orthogonal multiple access downlink transmission method for space array communication, the spectrum efficiency is effectively improved, and thecalculation complexity is low.

The invention discloses an energy efficiency-based resource allocation method in an SCMA downlink system. Under the advocation of green communication, the transmission quality of a user is ensured, and the energy consumption and the environmental pollution are reduced, so that sustainable development is realized. According to the energy efficiency priority joint resource allocation method providedby the invention, an energy efficiency-based joint codebook and power iterative allocation algorithm is provided aiming at maximizing the system energy efficiency, and the method comprises the following steps of: firstly, assuming that power is fixedly allocated, and designing an energy efficiency gain-based codebook allocation scheme; secondly, under the condition that codebook distribution is fixed, power distribution is converted into a convex optimization problem to be solved; and finally iteratively distributing the codebook and the power to obtain the maximum energy efficiency. According to the method, the energy efficiency performance of the system is improved while the transmission quality of the user is ensured, and the method is of great significance to green communication of the SCMA downlink system.

The present invention discloses a resource allocating method based on terminal direct communication, which includes: using exhaustive search to find all feasible reuse combinations, wherein the feasibility thereof is mainly determined according to a channel state and a communication demand of a user; screening the reuse combinations meeting the condition to entering a candidate set, and calculating a throughput gain of all of the reuse combinations in the set; finding the reuse combination with the greatest throughput gain to enter an effective set, and allocating a resource for the same; deleting all reuse combinations conflicted with that in the effective set, to ensure the D2D user and the cellular user will not obtain a repeated resource; repeating the selection until the reuse combinations only contains a pair of D2D users and one cellular user; and using a Kuhn-Munkres algorithm, to find the optimal reuse combination to enter the effective set. Each reuse combination in the effective set has a resource, and the D2D user reuses the resource of the cellular user in the same combination.

The invention discloses a satellite fusion unmanned aerial vehicle carried 4G communication base station air-to-ground networking system, which comprises 4G communication base station equipment integrated on an unmanned aerial vehicle platform, a sight distance link airborne terminal, a Ka satellite communication airborne terminal, a ground control station and a gateway station. The Ka satellite communication airborne terminal and the gateway station form a Ka satellite communication link through the low-orbit broadband communication satellite, and the 4G communication base station equipment and the line-of-sight link airborne terminal are both connected with the Ka satellite communication airborne terminal. The system provided by the invention can provide networking service with lower delay and larger bandwidth by utilizing the 4G communication technology and the Ka high-throughput satellite communication system, and supports access of more ground terminal users.

The invention discloses an MDI-QKD network communication system and a communication method. Each communication unit is set to correspond to an optical fiber mode; wherein the optical fiber modes corresponding to all the communication units are not completely the same, and the optical fiber modes of at least two communication units are different. And when the two user terminals of the same communication unit communicate with each other, the two user terminals send the quantum signals of the optical fiber mode corresponding to the communication unit to the central node device. At the same time,the communication units with different optical fiber modes can communicate simultaneously based on different optical fiber modes; in the communication units with the same optical fiber mode, only onecommunication unit can carry out communication at the same moment. Therefore, the optical fiber modes of the at least two communication units are different, when the two user terminals in one communication unit communicate, the two user terminals in at least one other communication unit can communicate at the same time, and the communication rate and the access number of the user terminals in thenetwork can be greatly improved.

The invention discloses a distributed power supply cluster control system which comprises a distributed power supply cluster monitoring main station and a plurality of distributed power supply clusters. Each of the distributed power supply clusters comprises a distributed power supply cluster management device connected to the distributed power supply cluster monitoring main station and multiple distributed power supplies connected to the distributed power supply cluster management device. The invention also discloses a control method of the distributed power supply cluster control system. The method comprises the steps that the distributed power supply cluster monitoring main station monitors a grid operation state in real time, carries out area optimal flow calculation, obtains the active power control constant value, the reactive power control constant value, the power factor control constant value and the voltage control constant value of each distributed power supply cluster in an optimal flow condition, issues the control constant value of the distributed power supply cluster to the distributed power supply cluster management device, and the distributed power supply cluster management device carries out distributed power supply control. According to the system and the method, the influence on the safety stability of a power grid by a distributed power supply grid connection can be reduced.

The invention provides a subcarrier modulation-based OQAM-OFDM wavelength stack PON downlink transmission system. Based on subcarrier modulation, a DSB-SC module generates an optical subcarrier required for subcarrier modulation. That is, a single laser provides an optical carrier for two downlink radio frequency OQAM-OFDM signals. In this way, the utilization rate of resources is improved and the cost of an access network system is lowered. OQAM-OFDM modulation signals are high in sidelobe suppression ratio and spectral efficiency and can relax the ICI interference and the ISI interference. Based on the comprehensive utilization of the above advantages of the OQAM-OFDM modulation signals, the downlink signal transmission of narrower subcarrier interval is realized. Meanwhile, the bandwidth utilization ratio is improved and the access number of users is increased. Based on the flexible deployment of the system, the long-distance heterodyne coherent detection on OQAM-OFDM signals can be realized through the direct detection of a photoelectric detector.

The invention discloses a multi-domain joint hybrid non-orthogonal multiple access model framework and a resource allocation scheme, which comprise the following two stages: in the first stage, a dynamic codebook allocation method is utilized to carry out subcarrier allocation on far and near user groups, and far and near user groups are paired; in the second stage, MPA and SIC joint detection is used, and the optimal power distribution scheme with the maximum total rate of the system is obtained. According to the invention, improvement is made on the basis of a traditional non-orthogonal multiple access system, and a new multi-domain joint hybrid non-orthogonal multiple access model framework is provided. Compared with a traditional model, the new model greatly increases the equipment access number and expands the system capacity. The invention further provides a resource allocation scheme based on the model framework, subcarrier allocation is carried out by utilizing a dynamic codebook allocation method, user pairing and power control optimization are combined, the system spectrum efficiency is further improved, MPA and SIC joint detection is used at a receiving end, and the calculation complexity is reduced.

The invention relates to a universal grouping method for users in non-orthogonal multiple access based on machine learning. The universal grouping method comprises the following steps: 1, acquiring transmitting power budget and channel gain coefficient data of all users in a system; 2, constructing a multi-user packet communication model; 3, solving the multi-user packet communication model to obtain a power optimization closed-form solution and a user packet solution; and 4, grouping the users according to the user grouping solution, and performing power control through a power optimization closed-form solution to complete universal grouping of the users. Compared with the prior art, the method has the advantages of realizing user overlapping grouping, improving user access amount, considering calculation complexity and effectiveness and the like.

The invention discloses a WIFI authentication system and method supporting high speed agent authentication. The system comprises an AP, an AC authentication server and an AAAP authentication server. The AP comprises an internal switch, a local controller, a wireless interface control management module, an AAAP authentication module and an AC communication module, wherein the local controller, the wireless interface control management module, the AAAP authentication module and the AC communication module are connected with the internal switch. The wireless interface control management module is used to realize WIFI Internet connection. The AC communication module is used to receive the instruction information of the AC authentication server. The local controller is used to generate a control signal according to the instruction information. The AAAP authentication module is used to receive the networking request of a takeover party, authenticate the identity of the takeover party, and compare relevant ID information and key information. The system provided by the invention has two kinds of authentication modes, such as local takeover party agent authentication and remote operator authentication. The system has the advantages of enhanced supervision and improved response speed, facilitates dynamic adjustment, and ensures an efficient, safe and reliable WiFi service.

The invention relates to the technical field of networks / the technical field of wireless local area networks, and particularly relates to data acceleration technology and data detection technology on a WIFI network. The invention discloses a network device comprising a CPU, wherein the CPU is a multi-core CPU; the multi-core CPU comprises at least one basic core and at least one data task core; the basic core is used for managing and controlling the network device, managing and controlling the data task core and creating, managing or deleting a working process running in the data task core; and the data task core is used for running the working process in the data task core to process data flow corresponding to the network device. By means of the multi-core, acceleration processing is carried out on AP data to realize functions that cannot be realized by general AP, and thus the user experience is improved.

The invention discloses an uplink SCMA transmitting method and an uplink SCMA receiving method based on codebook multiplexing. The uplink SCMA transmitting method comprises the following steps that abase station allocates codebooks to a plurality of users in a scheduling period, wherein the same codebook is allocated to a specific number of users; the users perform SCMA codebook mapping accordingto the allocated codebook to obtain code words; and the users send the code words to the base station by using a sparse spread spectrum method. According to the invention, the system capacity can beimproved on the premise of not designing a complex power distribution mode and not changing a resource distribution mode.

The invention discloses a VDE-SAT time slot mapping dynamic configuration method. The method comprises the following steps: S1, dividing a satellite communication global coverage area to obtain a plurality of acquisition areas, and obtaining original user feature data; S2, performing time slot mapping dynamic configuration based on the original user feature data to obtain time slot mapping dynamic configuration prior parameters in each acquisition area; S3, after a satellite rotates around the earth for one round, acquiring the plurality of acquisition areas again to obtain current user feature data in each area; S4, performing time slot mapping dynamic configuration based on the current user feature data to obtain current time slot mapping dynamic configuration parameters in each acquisition area; and S5, based on the time slot mapping dynamic configuration priori parameters and the current time slot mapping dynamic configuration parameters, carrying out weight distribution calculation to obtain a period number p as optimal channel mapping configuration. According to the invention, the utilization rate of the channel time slot in the VDE-SAT communication system can be effectively improved, the access number of users in unit time is effectively increased, and the access performance of the system is improved.

The invention belongs to the technical field of navigation management equipment, particularly relates to a navigation management equipment operation state monitoring and analyzing platform, and provides the following scheme that the platform comprises main hardware of the monitoring and analyzing platform and main functions of the monitoring and analyzing platform. Main hardware of the monitoringanalysis platform comprises an air traffic control equipment data isolation and acquisition unit, a power environment data isolation and acquisition unit, navigation station remote data acquisition and processing equipment, a monitoring analysis platform server, navigation station transmission equipment, a monitoring analysis platform terminal and monitoring analysis platform center network accessequipment. The airport navigation station, the communication meteorological machine room navigation management equipment and related facilities are monitored in a centralized mode, real-time monitoring, automatic warning and auxiliary management of the operation states of the navigation management equipment and the related facilities are achieved, real-time mastering of related management departments for the equipment operation situation is enhanced, and the efficiency of equipment management and on-duty work is improved.

The present invention disclosed a method of optimizing the number of 5G communication system terminals in the dense scenario. The terminals in the system include the honeycomb network terminal (CUE) and the D2D mobile terminal (DUE).The communication radius, path loss factors in the community, etc. (2) Initialize the color matrix of the resource allocation scheme according to the number of CUE and D2D users in the network;Later Due's signal interference noise ratio to determine the selected color order; (4) determine whether the new DUE meets the requirements of the access network, if not satisfied, select the next D2D pair, transfer to step (3); (5)For newly accessing DUE coloring groups; (6) After all Due packets are completed, the end method is ended.The present invention can achieve the resource optimization and distribution of 5G communication systems, calculate the maximum number of connecting D2D terminals in the system, and effectively increase the number of D2D users in the system.

The invention discloses a distributed power supply cluster control system, comprising: a distributed power supply cluster monitoring master station and multiple distributed power supply clusters, each distributed power supply cluster includes: a distributed power supply cluster monitoring master station A distributed power cluster management and control device and multiple distributed power sources connected to the distributed power cluster management and control device. The invention also discloses a control method of the distributed power cluster control system: the distributed power cluster monitoring master station monitors the operating status of the power grid in real time, performs regional optimal power flow calculations, and obtains the active power of each distributed power supply group under the optimal power flow condition Power control setting value, reactive power control setting value, power factor numerical control setting value and voltage control setting value, and send the control setting value of the distributed power supply cluster to the distributed power supply cluster management and control device, and the distributed power supply cluster management and control device Perform distributed power control. The invention can reduce the impact of distributed power grid connection on the security and stability of the grid.

The invention discloses a cooperative relay D2D communication method based on OFDM, which comprises the following steps that: a long-distance D2D pair performs data relay communication through a special D2D pair, the special D2D pair multiplexes a plurality of resources and serves as relay equipment, and a plurality of available resources are utilized to perform signal transmission based on OFDM; a frame structure of a communication system is divided into two time slots with the same length, a special D2D transmitter can transmit signals and receive relay forwarding signals in the odd number time slots, and the special D2D transmitter transmits self transmission signals and forwards the relay forwarding signals based on OFDM in the even number time slots. According to the method, the D2D user is selected as the relay equipment of the long-distance D2D pair, so that the problem that D2D communication cannot be carried out due to distance limitation can be effectively solved, and the D2D access number of the system is effectively increased; the condition that one D2D multiplexes a plurality of cellular resources can be fully utilized through the OFDM technology, the spectrum utilization efficiency in the system is effectively improved on the premise that the communication quality of the special D2D serving as the relay is guaranteed, and the method has wide practical value and application prospects.

The invention provides a data card and a radio communication system, the data card includes a radio communication unit for demodulating and decoding received Internet data according to Internet protocol to obtain basic data; a protocol control unit for carrying out 1394 protocol packaging for the basic data according to 1394 protocol to obtain 1394 protocol package data; and a 1394 interface unitfor sending the 1394 protocol package data to user terminal. The data card of the embodiment of the present invention employs 1394 interface, solves problem of low output current because present datacard uses other interface, and increases transmission rate and access quantity of the data card, based on point-to-point communication characteristic, equipment can directly communicates without participation of third party.

The invention discloses a distributed Internet of things serial server. The distributed Internet of things serial server comprises a terminal device, a collection server and an Ethernet; wherein the collection server comprises a RS485 communication module, a MCU master control module and a TCP / IP network communication module; the terminal device is communicated with the RS485 communication modulein a both-way manner; the RS485 communication module is communicated with the MCU master control module in the both-way manner; the MCU master control module is communicated with the TCP / IP network communication module in the both-way manner; and the TCP / IP network communication module is communicated with the Ethernet in the both-way manner. The distributed Internet of things serial server provided by the invention solves the three problems that the accessed equipment is less, the network transmission efficiency is low, and the server load is heavy in the communication of a traditional serialserver when the Internet of things devices are connected to the Internet in a large scale.

The present invention provides a PRACH access control method, access method and device, which are used to solve the problem that the current PRACH access mechanism is likely to cause increased PRACH access conflicts when the base station is responsible for large terminal data. The method includes: receiving the terminal Multiple physical random access PRACH preamble numbers sent through each subframe of the virtual access frame; obtain the PRACH access number of the terminal according to the mapping relationship between the PRACH preamble number and the PRACH access sequence number pre-agreed with the terminal; The obtained PRACH access number is sent to the terminal. This solution reduces the collision probability of the terminal performing PRACH access and increases the number of allowed terminal access.