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.

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 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 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 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 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 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 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.