79results about How to "Increase access capacity" patented technology

The invention relates to a rapid power coordinative control method of a new energy station participating primary frequency modulation. A rapid power coordinative control system is built in a new energy plant station, the system is used for receiving a rapid power regulation instruction of a stability-control host station system and an AGC / AVC planning regulation instruction of a dispatching center, and can also be used for locally, automatically and rapidly calculating a target power in an off-line way, decomposing the target power and directly issuing the target power to various power generation units such as photovoltaic inverters and draught fans in the station through an Ethernet network, so that active power and reactive power regulation response of the new energy station within 100 milliseconds is achieved, the primary frequency modulation of a power system is participated to achieve stable system frequency and voltage, and the stability of the system and the economic running level of the new energy power station are improved.

The invention discloses a downlink component carrier wave identification method, including the followings: the system information of each downlink component carrier wave in a set of downlink component carrier waves at least includes frequency point information bearing the downlink component carrier wave of random access response, or includes frequency point bearing the downlink component carrier wave of random access response and bandwidth information thereof; or at least includes identification information bearing the downlink component carrier wave of random access response, and the identification information and frequency point information of each downlink component carrier wave, or the identification information, frequency point and bandwidth information of each downlink component carrier wave. Or, the corresponding relation between each downlink component carrier wave of a set of downlink component carrier waves and random access leader sequence is set, and the system informationof each downlink component carrier wave in a set of downlink component carrier wave at least includes self-identification information and the number information of downlink component carrier wave in a set of downlink component carrier waves. Simultaneously, the invention also discloses a reporting method and a device of synchronous downlink component carrier wave. The invention is simply realizedand is practical.

The invention provides a method, equipment and a network for load balancing based on frequency band in wireless local area network. The method comprises the steps as follows: when a wireless AC (Access Controller) is related on a wireless terminal or the wireless terminal departs from the AC, the load of a first frequency band and that of a second frequency band in a load balancing group can be obtained, wherein the load balancing group includes a plurality of APs (Access Points) with signals covering one another below the AC; the AC subtracts the load of the first frequency band from the load of the second frequency band to obtain a load difference value; and under the condition that the absolute value of the load difference value is not smaller than the load threshold, the AC indicates all the APs in the load balancing group not to reply a detection request of the first frequency band of a dual-band wireless terminal in the follow-up procedure. The method has the advantage that the phenomenon that the dual-band wireless terminal adopts a frequency band with too large load for access can be avoided, so that load balancing based on frequency band can be realized, and load balancing between frequency bands can be realized.

A system for increasing the call capacity of an access point in a WLAN, allowing the number of WLAN phones that can be supported to be increased. The system determines whether a maximum total voice path delay would be exceeded if the packetization delay is increased for packets in a call. In the event that the packetization delay can be increased without the total delay exceeding the maximum delay, the disclosed system increases the size of packets used in the call, if all participating devices can process the increased packet size. The maximum delay may be predetermined, and reflect a maximum delay that cannot be exceeded without adversely impacting the voice quality of a call. If the two end points for a call are determined to be physically “local” to each other, packetization delay for the call may be increased based on the assumption that the increased packetization delay will not decrease the voice quality of the call.

The invention provides a multi-channel flash memory card control device and a control method thereof. The multi-channel flash memory card control device comprises a host interface unit, a command data processing unit and flash memory card interface units, wherein the host interface unit is a USB 3.0 protocol host interface unit, a plurality of flash memory card interface units independent of each other are eMMC protocol flash memory interface units, and the command data processing unit includes a command processing unit and a data processing unit. By dividing a command which is transmitted by the high-speed serial communication protocol host into a plurality of sub-commands to the flash memory card interface and by performing time-overlapped interaction of the commands and the data through the flash memory cards, the goals of extending access capacity and improving access speed are achieved, the use cost of the product is reduced and the use flexibility of the flash memory cards is extended.

The invention discloses an entry aggregation method in a SPBM (shortest path bridging MAC mode) network and equipment. The SPBM network comprises BEB (backbone edge bridge) equipment and a user network connected with the BEB equipment. The user network comprises an access layer switch, and a client and an address allocation server connected with the access layer switch. The method is applied to the BEB equipment and comprises steps: after an Ethernet packet of a client sent by the access layer switch is received, a matching entry is queried in a MAC (media access control) forwarding table according to the source MAC address of the Ethernet packet, wherein the source MAC address of the Ethernet packet is a proxy MAC address allocated for the client by the address allocation server; if the matching entry is not queried, the MAC forwarding entry containing the source MAC address is added in the MAC forwarding table; and when the MAC forwarding entry is synchronous in other BEB equipment in the SPBM network, a plurality of MAC forwarding entries belonging to the same MAC address section in the MAC forwarding table are aggregated into an aggregated MAC forwarding entry, and the aggregated MAC forwarding entry is synchronous in other BEB equipment.

The invention relates to a back plate and communication equipment. The back plate disclosed in the embodiment of the invention is provided with an insertion port respectively on the two sides, the insertion ports are used for connecting with at least two insertion frames, and the insertion ports comprise first insertion ports for inserting a first type of daughter cards and second insertion portsfor inserting a second type of daughter cards; the first insertion ports are provided with connectors, wherein the number of the connectors is not less than that of the second insertion ports; the second insertion ports are provided with connectors, wherein the number of the connectors is not less than that of the first insertion ports; the connectors on the first insertion ports are respectivelyconnected with one connector on each second insertion port, and the connectors on the second insertion ports are respectively connected with one connector on each first insertion port; and at least one first insertion port on one side of the back plate is crossed with at least one second insertion port on the other side of the back plate, orthogonal connectors are arranged on the back plate on the cross points of the first insertion ports and the second ports, and the first type of daughter cards inserted on the first insertion ports are connected with the second type of daughter cards inserted on the second insertion ports through the orthogonal connectors on the back plate.

The invention discloses a code multiple-access method. The method comprises a step of selecting a codebook from a preset codebook set to encode a data stream based on non-orthogonal sparse encoding superposition technology when the data flow sent by user equipment is received, a step of obtaining a resource block corresponding to the user equipment according to the mapping relationship between the user equipment and the resource block in the codebook, and a step of transmitting the encoded data stream by using the resource block. The invention also discloses a code multiple-access device which comprises an encoding unit, a resource block obtaining unit and a transmission unit. According to the method and the device, the access capacity of a system can be increased exponentially, at the same time the multidimensional modulation and spread spectrum technology is used, and the link quality of a single user can be increased greatly.

A control apparatus with multiple flash memory card channels includes a host side port unit, an instruction data processing unit, and flash memory card port units. The host side port unit exchanges a host side instruction and host side read / write data with a high-speed serial communication protocol host side. The flash memory card port units respectively exchange flash memory card instructions and flash memory card read / write data with a plurality of flash memory cards. An instruction from the high-speed serial communication protocol host side is divided into multiple sub-instructions to be respectively transmitted to the flash memory card port units and exchange of instruction and data with a plurality of flash memory cards is carried out in a coincident period of time so as to achieve the purposes of expanding access capacity and increasing access speed, reducing the operation cost of products, and enhancing flexibility of use of flash memory cards.

The invention relates to a voltage longitudinal protective method of a power distribution network with inversion type distributed power supplies. The method comprises the steps that a protective relaying device is electrified; line parameters are initialized; a practical rated capacity of each distributed power supply is initialized; a voltage setting value is calculated; latest active power reference values, collected before start of the protection, of the distributed power supplies collected before start of the protection are obtained; positive-sequence voltage phasor U<M_pcc0> and current phasor I<M> of a bus M as well as positive-sequence voltage phasor U<N_pccn+1> and current phasor I<N> of a bus N are obtained; positive-sequence voltage calculated values U<M_pcck> and U<N_pcck> of each common joint point PCC are calculated; the positive-sequence voltage difference between the positive-sequence voltage calculated values U<M_pcck> and U<N_pcck> is calculated; a maximal positive-sequence voltage difference of n+2 nodes is selected as an action value of protection; whether the action value of protection is greater than a voltage setting value is determined; and if YES, a fault in the area is determined, and protection action is implemented. Thus, the distributed power supplies can be connected to the power distribution network in a flexible and scattered way needless of extra longitudinal channels, and the method has the advantages of high applicability, reliability and practicality in engineering practice.

The invention provides an API request encryption method, a data interaction method and system and relates to the field of communications, so as to solve the problem that an existing service-level dataencryption mode is low in safety coefficient, the security of the service-level data is guaranteed, and the security coefficient is improved. The encryption method is applied to a client and a serverand comprises the following steps of a sorting step: sorting screening parameters in the API request according to a sequence of the ASCII code tables of the parameter names, wherein the screening parameters are the request parameters excluding the parameter names of sign and byte [ ]; a splicing step: sequentially assembling the sorted parameter names and parameter values corresponding to the parameter names in sequence, and generating a character string; an encoding step: encoding the spliced character string to generate a byte stream; and an encryption step: using a signature algorithm to carry out digest on the encoded byte stream to obtain a byte stream result. The signature algorithm comprises an MD5 algorithm or an HMAC-MD5 algorithm; and the byte stream result is represented in hexadecimal.

The present invention discloses a resource release method and device in the handover process. The method includes: a network side device starts a resource release timer after determining that the control plane handover of a user terminal UE is completed; the network side device starts a resource release timer after the resource release Before the timer expires, when the tracking area update TAU request sent by the UE is received, the resource release timer is stopped, and the network side resource release is triggered. The present invention releases resources on the source network side when a user initiates a TAU process, without waiting for the timer to expire, so that the user's resources on the network side can be released as soon as possible, and the access capacity of the network is improved.

The invention discloses a flow unloading method based on reference signal received power (RSRP). The method includes the following steps: S1 initializing, generating a network deployment diagram, generating base stations and users and generating macro cell users and pico cell users; S2 partially multiplexing frequency resources of a heterogeneous network; S3 building loading tables and RSRP tables received by the users; S4 selecting the users meeting the unloading condition that the unloading condition of macro cells is rk and i+RSRP0 > / =rk, 0, and the unloading condition of pico cells is that rk, j, j belongs to [1, 2, 3, 4, 5, 6] / i, rk, j> / =rk, i; S5 selecting target pico cells switched by the users; S6 updating the loading tables of all cells and the RSRP tables of all the users. By means of the method, system energy efficiency, access capacity and covering range are improved by conducting flow unloading on the macro cells and the pico cells meeting the unloading conditions, system spectrum efficiency can be improved, and interference received by edge users of the pico cells and from the macro cells and the neighborhood pico cells can be reduced.

A method for fast power response of inverter of photovoltaic power station is provided. In this method, the total station inverter is configured as a common inverter which participates in power regulation and a sample inverter with natural maximum power generation which does not participate in power regulation, A DC bus voltage reference value of a sample inverter of an adjacent area is obtained by a common inverter based on communication, At that same time, the power target value sent from the fast power control device at the factory station end is received, and regulated by voltage outer loop and current inner loop, a fast power drop or leapfrog power climb execution response are performed so as to achieve a fast power control objective for the individual inverter of 50 milliseconds andtotal station of 100 milliseconds, to meet the response requirements of the system for 100 millisecond regulation of the photovoltaic power plant in case of power grid disturbance or abnormal state, ,thereby improving the stability of the power grid, as well as the photovoltaic grid-friendly and cost-effective performance.

A wireless multiple access method allows multiple transmitters to access the same channels so that substantial interference occurs. The transmitters use low rate turbo coding and the receiver uses multi-user detection to separate and decode the transmissions. Different propagation and / or transmission characteristics between the transmitters help to distinguish the transmissions at the receiver. The transmitters may add random variation to their transmission timing, power and / or frequency to assist with decoding.

A method and system for accessing a reverse common channel in a wireless network, said method comprises: according to burst data to be sent, a terminal sending a burst data request to a base station in said reverse common channel; according to captured said burst data request, said base station allocating resources to the burst data to be sent in said reverse common channel, and notifying allocated resources to said terminal through a forward common channel; and said terminal using said resources allocated by said base station to send said burst data to said base station in said reverse common channel according to a Hybrid Automatic Repeat Request (HARQ). The present invention can improve the access capacity of the reverse common channel and the rate of carrying the burst data in the reverse common channel, especially in the Do Rev. A system.

The embodiment of the present invention discloses a carrier selecting method and device and an access point. The method comprises the steps of using the access point to select the unauthorized carriers according with a first condition from the unauthorized carriers as a first carrier set; sending a discovery signal on the all unauthorized carriers in the first carrier set; using the access point to receive the measurement results of user equipment to the all unauthorized carriers in the first carrier set, and based on the measurement results, selecting the unauthorized carriers according with a second condition from the unauthorized carriers as the carrier resources of the access point.

The invention discloses a method for communication strategy selection and resource allocation of a wireless terminal based on a Stackelberg game. A three-party collaborative resource allocation plan is designed based on a Stackelberg game model. According to the method, a base station can determine preliminary division of a spectrum band authorized by the base station for a requester and power distribution shares of all relays participating in communication and collaboration, and the requester and the relays can respectively dynamically adjust an initial allocation bandwidth value and a transmission power value during data transmission according to the feedback information, so that the utilization rate of wireless resources can be further improved, the relay communication performance under the condition that a source node is far from a target node can be remarkably improved, the overall energy consumption of a network is reduced, the system access capacity is improved, and the method is beneficial to optimizing the wireless resource allocation and promoting the overall performance of the network.

The invention discloses a modulation and demodulation method and device for a GFDM signal. The modulation method comprises the following steps: carrying out channel coding on a binary signal to be transmitted, and carrying out grouping mapping to obtain a multi-system symbol; generating a corresponding ZC cyclic shift keying sequence after cyclic shift of the primitive ZC sequence according to the multi-system symbol; taking the ZC cyclic shift keying sequence as a spread spectrum code string, and adopting CCSK to carry out spread spectrum on binary data; carrying out serial-parallel conversion on the spread spectrum data to generate data blocks, and enabling column vectors of the data blocks to be a column of ZC cyclic shift keying sequences; taking the column vector of the data block as a sub-symbol of the GFDM; according to the primitive ZC sequence and the corresponding cyclic shift value, obtaining an IDFT form of the sub-symbol; and performing cyclic shift filtering on the IDFT form of each sub-symbol, and performing superposition to generate a baseband signal waveform. Aiming at the characteristics of low channel signal-to-noise ratio, large signal path fading, sensitivity to a signal peak-to-average power ratio and the like in satellite communication, the PAPR of a transmission signal is reduced, and the anti-interference performance is improved.

A method for improving subscriber access capacity of a broadband access device is disclosed, including: establishing a Virtual Local Area Network Path Identifier (VlanPI) and corresponding VlanPI Tag, establishing a VLAN Circuit identifier (VlanCI) and corresponding VlanCI Tag for each access port of the broadband access device, dividing the access ports into groups and assigning the established VlanPIs to each group; then, before transmitting an ethernet frame, determining the VlanCI which corresponds to the access port and inserting the VlanCI Tag for identifying the VlanCI into the standard ethernet frame, determining the VlanPI corresponding to the group to which the access port belongs and inserting the VlanPI Tag which is used to identify the VlanPI into the standard ethernet frame, and transmitting the ethernet frame to an uplink device through an uplink port by the broadband access device which directly connects with the uplink device.

The present invention provides a teaching resource library management system. The system comprises: a physical server and a teaching device corresponding to the same. The physical server is used for establishing a virtual server cluster; the cluster comprises a plurality of virtual servers, and each virtual server corresponds to at least one virtual machine; a virtual machine is mounted on the teaching device; a teaching resource library cloud integration system is pre-mounted on the virtual machine; the cloud integration system comprises a simulated practicel training platform apparatus, which is used for receiving a calling instruction and a control instruction that are sent by a teacher, searching for corresponding simulated practice training software according a calling parameter carried by the calling instruction, and processing the simulated practice training software according to the control instruction and presenting a processing result; the simulated practice training platform apparatus is capable of providing a simulated practice training software platform for the teacher, so that the teacher can use the simulated practice training software for teaching and conveniently present teaching content visually; and a virtualization clustering technology adopted by the physical server enables the user access capacity to be increased and enables union and integrity of application system data to be improved.

The present disclosure relates to a method and a device for transferring data between multiple clients and a destination node. The method includes: receiving request data sent by the plurality of clients, adding a unique label to the request data sent by each client, and sending the labeled request data to the second node; removing the labels from the request data, and sending the request data with the labels removed to the destination node for processing; receiving processing result data returned by the destination node, adding unique labels to the processing result data, and returning the processing result data with the labels to the first node; removing the labels from the processing result data and returning the processing result data with the labels removed to the clients corresponding to the labels.

The embodiment of the invention discloses an application cache data processing method, device, equipment and system. The method comprises the following steps: determining a cache space, and dividing the cache space into a hot spot area and a preparation area; receiving a target cache data loading request, and loading the target cache data to the preparation area; judging whether the access information corresponding to the target cache data meets a first access condition or not, wherein the first access condition comprises that the access frequency reaches a preset frequency and the access timeis within a preset range; and when it is determined that the first access condition is met, moving the target cache data to the hot spot area. With application of the embodiment of the invention, theproblems of low hit rate and pollution of the cache due to the fact that the cache is directly moved to the head position of the application cache area can be effectively avoided so that the system performance can be effectively improved.

A functional system comprises a set of functions (F) requiring access to a collective resource (RSRC). Such a system can be, for example, a data processing system comprising a plurality of processors requiring access to a collective memory. For reasons of cost it is desirable to guarantee a certain minimum access for one or more functions while a certain degree of flexibility as regards the access is maintained. For this purpose, the system comprises an interface (INT) adapted to implement an access scheme (AS) characterized by a plurality of states (S) passed through in a predetermined manner. A state (S) forms a possibility of access of a given length and defines an order of priority in accordance with which a function (F) can access the collective resource (RSRC).

The sync digital transmission equipment includes cross unit creating connection to the service access unit via the service bus to complete the service dispatching between service access units, clock unit providing the system with sync clock, and control unit controlling the cross unit and the clock unit to complete the system configuration and monitoring. The cross unit includes bus operation mode in at least one frequency, the clock unit provides at least one clock frequency backing up sync clock bus operation mode, and the control unit identifies information based on the bus rate the service access unit connected to the cross unit and allocates the service access unit, the cross unit with corresponding sync clock and selects corresponding bus operation mode. The present invention also discloses corresponding sync digital transmission method. The sync digital transmission equipment and method can raise bandwidth access capacity on the basis of traditional SDH or SONET equipment while maintaining forward compatibility.

The invention discloses an intelligent railway vehicle operation and maintenance system and method, and the method comprises the steps: collecting operation and maintenance data of an intelligent railway vehicle through a data collection terminal, and transmitting the operation and maintenance data to an embedded NB-IoT main control chip through a data collection interface; the embedded NB-IoT main control chip performing data conversion processing on the received operation and maintenance data; sending out the processed data through an NB-IoT communication interface, uploading the processed data to a far-end application client through an NB-IoT wireless transmission network layer, receiving a configuration parameter instruction issued by the application client, and performing corresponding configuration according to the configuration parameter instruction; and the application client receiving the data processed by the embedded NB-IoT main control chip, receiving an interaction instruction issued by a user, and issuing a configuration parameter instruction to the embedded NB-IoT main control chip according to the interaction instruction. The NB-IoT narrowband Internet of Things technology is adopted, and the method has the advantages of being low in power consumption, wide in coverage, large in terminal access capacity, low in cost and the like.

The invention provides a prepayment management system and an edge computing communication terminal. An edge computing communication terminal is arranged between an electric meter and a cloud background server; the edge computing communication terminal establishes a virtual ammeter data computing storage module with a unique number for each accessed ammeter; a cloud background server is replaced tocarry out degree reading and electric charge calculation on the electric meter; a common electric meter without a prepayment function can achieve the prepayment function, electric charge and prepayment balance calculation can be completed more quickly, electricity control can be conducted more quickly and timely, and it is guaranteed that important data and commands such as electricity price information, recharging data and an electricity control instruction are encrypted through an algorithm and are safely communicated through a wide area network. The problem of resource limitation caused bythe fact that a traditional background prepayment system needs server and network communication expansion due to increase of the number of ammeters is solved, and the ammeter access amount is increased. The prepayment function of an ammeter user is not influenced by cloud background server faults and communication network faults, the system reliability is high, and the data communication is safe.