81results about How to "Reduce system overhead" patented technology

The invention relates to an embedded distributing emulation platform basen od HLA faced to space instrumentation and command and a method for carrying out same. The platform supports a distributed interactive simulation and is developped to high application based on HLA/DIS bottom protocol, and carrys out parallel running of multi-emulation platforms, and can record and playback the display and emulation process of two-dimension situation and three-dimension virtual environment for measurement and control environment and measurement and control object during the emulation process. The specific fuction of system includes: carrying out the emulation for measurement and control environment and measurement and control object by the emulation environment platform; adding, replacing or modifying the dynamic model, behavior, sensor and countermeasure of emulation body in the emulation engine by the assemble structure; having expandability; the platform development package having the application interface independently to the protocol; having the functon of route prediction and smoothness in order to display image of situation emulation more fluent and smooth; capable of record in-situ emulation data such that the whole process of virtual emulation training is playbacked, analyzed and evaluated.

The invention relates to a method and a device for tracing a source of an internet protocol (IP) address after network address translation (NAT). The method includes: obtaining a data packet and extracting a connecting IP and a connecting port of the data packet after the NAT; finding mapping record corresponding to the connecting IP and the connecting port in a preset NAT mapping table; and obtaining a source IP address of the data packet according to the mapping record. In addition, the device for tracing the source of the IP address after the NAT is included. By means of the method and the device for tracing the source of the IP address after the NAT, system expenditure can be reduced.

The invention discloses a data transmission method and device based on the priority level as well as network equipment. The method comprises: when a message to be sent is obtained, determining a threshold interval in which the current queue length of the buffer queue for caching messages to be sent is located; according to the determined threshold interval and the corresponding relationship between the threshold interval built in advance and the allowable priority level of the message allowed to enter the buffer queue, determining the allowable priority level of the message which is allowed to enter the buffer queue for caching messages to be sent; and according to the situation that whether the priority level of the obtained message belongs to the determined allowable priority level, determining whether the obtained message is added into the buffer queue. The data is guaranteed to transmit according to the priority level only,by one buffer queue and the set threshold interval, large system cost caused by polling a plurality of priority levels can be avoided, and system performance is improved.

The invention discloses a communication method between a real-time operating system and a non-real-time operating system on a multi-core processor. The method comprises the following steps that firstly, the length of information of each frame and the capacity of the shared memory are statically configured; secondly, the shared memory is divided into a buffer area for synchronous messages and a queue for asynchronous messages, a progress of processing the messages is established for the real-time operating system and the non-real-time operating system, and internuclear interruption is registered on the multi-core processor; thirdly, the operating systems are communicated, the operating system sending the messages stores the messages into the corresponding part in the shared memory, the internuclear interruption is triggered, the operating system receiving the messages responds to the internuclear interruption, the messages are copied from the shared memory, the feedback is sent to the operating system sending the messages, and communication is finished. According to the communication method, the communication mode adopted in the messages is set in advance, a unified mapping table is not needed, and the progress can be managed conveniently.

The invention discloses a report method for indicating the overloading of relay network, which includes: a base station or a relay station divides network into a plurality of layers according to one or a plurality of predetermined divided thresholds; the overloading report trigger thresholds are arranged at every layer by the base station; the base station or the relay station makes use of respective overloading indicator to make sure whether a plurality of layers are provided with the user terminals of the overloading report trigger thresholds with the strongest interference signals larger than the corresponding layers. And if yes, the base station or the relay station triggers the overloading indicator to report. With the method of the invention used, the network can be further refined to ensure the overloading indicator to report only the layers which exceed the trigger thresholds. Therefore, the system overhead which is brought by the overloading indicator report is reduced and the efficiency of the overloading indicator is improved.

The invention discloses a self-adaptive identification method and system wherein the system comprises: according to a user's historical corpus, establishing a customized dictionary; clustering the customized words in the user's customized dictionary to obtain the type number of each customized word; constructing language models according to the type numbers of the customized words; during the identification of the inputted information of the user, if the words contained in the information exist in the user's customized dictionary, expanding the de-coding paths according to the type numbers of the customized words corresponding to the words; decoding the information according to the expanded decoding paths to obtain a plurality of selective decoding results; according to the language models, calculating the scores of the language models of the selective decoding results; and selecting the selective decoding result whose language model obtains the highest score as the information identification result. With the method and system of the invention, it is possible to increase the identification accuracy for a user's customized words and the consumption of the system can be reduced.

The invention discloses a method for configuring wireless parameters and transmitting signals and a device so as to solve the problem that a system has excessively high cost and expense caused by the fact that wireless parameter selection and signal transmitting methods are not suitable for wireless data transmission in application scenes of indoor areas and hot spot areas. According to the invention, a common LTE mobile communication system crystal oscillator principle is followed in subcarrier spacing selection. The subcarrier spacing is configured to be an integral multiple of LTE mobile communication system subcarrier spacing. Sampling frequency is an integral multiple of the LTE mobile communication system sampling frequency. FFT points are configured to be no less than the integer of a ratio of the sampling frequency to the subcarrier spacing. Therefore, FFT implementation cost is reduced, the system cost of covering the indoor areas and hot spots is greatly reduced, dispatching efficiency can be improved, the system expense is reduced, system throughput is improved and a demand of data traffic is met.

The invention relates to an LTE (long term evolution) broadcast multicast repeat method. The method comprises steps as follows: 1, an eNB (evolved Node B) caches data of broadcast multicast, a timer is started, cached data waits for a time T, each set of UE (user equipment) in RRC_IDLE or RRC_CONNECTED performs normal reception operation of broadcast multicast business and performs correct verification on received data packages, processing is not performed if reception is correct, and if an error occurs to reception, NACK (negative acknowledgement) is required to be replied, and the eNB is informed of the repeat data package with an error; 2, if the timer of the eNB is overtime and a repeat request of the UE is not received, the cache data are deleted, and all sets of UE are considered to have received data correctly; 3, after the eNB receives the error data package repeated by the UE, corresponding processing is performed according to user states. According to the method, only when an error occurs to transmission, the UE sends a repeat request to the eNB, and lower system expense is guaranteed while reliable communication of broadcast multicast is guaranteed.

The invention discloses a secret data transmission protection method based on the isomorphism of an asymmetrical encryption algorithm and aims to provide a protection method which has low cost, high efficiency and high safety and is used for the whole processes from decryption to transmission of secret data. A server trusted entity firstly selects a random number r, fakes a cipher text c of secret data, and sends the result to a client trusted entity through a public network; the client trusted entity decrypts the data and returns the result to the server trusted entity through the public network; and the server trusted entity restores a plain text m of the secret data from the result according to the isomorphism of the asymmetrical encryption algorithm. The invention solves the problem of safety when the secret data are transferred in non-trusted clients, open networks and server non-trusted user spaces, and does not need additional identity authentication, thereby reducing the cost.

A method, an apparatus and a system for cooperative resources scheduling and cooperative communication are provided. The method for cooperative resources includes: obtaining, by a network central controller, statistical information of all the users dominated by it in a first time period, dividing base stations to base station cooperative clusters according to the statistical information, and transmitting cooperative cluster dividing result to the base stations. The corresponding method and apparatus for cooperative communication are also provided. The solutions of the embodiments of the present disclosure can increase the transmission rate and user experience for the users at the edge of the cooperative cluster, and improve the fairness of the system users, while reducing the signaling overhead of the system, separating the computational tasks and reducing the difficulty of implementing the whole system.

The invention discloses a multi-task integrated management system based on an integrated on-board computer, and a processing method. The multi-task integrated management system is used as embedded software and runs in an integrated on-board computer. Using hardware resources provided by the integrated on-board computer, application functions of attitude control, satellite-ground data transmissioncontrol, energy management, temperature control, load imaging condition calculation, on-orbit programming, telemetry acquisition and the like are realized in a multi-task manner. Each of the application functions are assigned to different task modules to realize according to time constraints and access data and other characteristics. The multi-task integrated management system based on an integrated on-board computer is used, each aspect from system, component, circuit, even to devices realizing hardware, software, interface, and communication of the system is designed comprehensively at different levels, to achieve resource sharing, simplify interaction of satellite information flow, improve utilization rate of information resources, and save system overhead.

The invention discloses an NDIS (Network Driver Interface Standard)-based method and system. The method comprises the following steps of: configuring parameter data and storing the parameter data to a shared storage module, wherein the parameter data comprises customized access rules; intercepting packet data sent from a protocol driver layer to a miniport driver layer or from the miniport driver layer to the protocol driver layer; analyzing the intercepted packet data and determining that the data carried in the packet data is in accordance with access rules stored in the shared storage module; and processing the intercepted packet data by redirecting or content filtering. According to the NDIS-based redirecting/content filtering method and system provided by the invention, because layer-upon-layer overlaying of an application layer is not needed when redirecting and content filtering processing are executed, the system expenses is reduced, and the response speed and the redirecting efficiency are increased, and the reliability of executing redirecting and content filtering based on the configured parameter data is higher.

Embodiments of the present invention provide a method for implementing local routing of traffic, a base station and a system are provided, which relate to the field of communications technologies. The method for implementing local routing of traffic includes: judging whether local routing processing is performed on an uplink traffic flow of a first terminal that serves as a sending end; if it is judged as yes, updating a key of the uplink traffic flow of the first terminal and/or a key of a downlink traffic flow of a second terminal that serves as a receiving end to a public key; forwarding an encrypted data packet of the uplink traffic flow of the first terminal to the second terminal through the downlink traffic flow of the second terminal, where an encryption and decryption operation is not performed on the encrypted data packet before the forwarding or during the forwarding.

The invention provides a positioning method and a system, which relate to the technical field of computer technologies. The embodiment obtains the latitude and the longitude of a positioned target on a map, and obtains the boundary latitude and longitude of a preset area; obtains a boundary point in the preset area which has the same longitude with the positioned target, compares the latitude of the boundary point with the latitude of the positioned target, and judges whether the number of the boundary points on both sides of the positioned target is an odd number; and obtains the boundary point in the preset area which has the same longitude with the positioned target, compares the longitude of the boundary point with the latitude of the positioned target, and judges whether the number of the boundary points on both sides of the positioned target is an odd number. The embodiment calculates whether the positioned target is in the preset area through the simple method, and can reduce the calculation amount and reduce the system overhead compared with the prior art.

The invention relates to the field of communications and discloses an event handling method and device based on a time wheel timer. The event handing method and device are used for effectively reducing system overheads. The method includes the steps that each time event is listed into a time chain table corresponding to a current time component, with the lowest precision, contained in a corresponding time threshold value; circulated timing is carried out through a timer with the highest precision; every time the timer is overtime, whether overtime time chain tables exist or not will be judged, overtime time events recorded in an overtime time chain table will be popped up to be handled, each time chain table which is not overtime continues being listed in a time chain table corresponding a time component, of the next precision level, contained in a time threshold of the time chain table, monitoring continues being carried out through the timer, in this way, operation of a whole time wheel can be promoted just through one timer with the highest precision, the overtime conditions of each time event can be respectively monitored, and therefore system overheads are effectively reduced, and the capacity of a system corresponding to the time events is increased.

The invention provides a data access method and a computer system, and belongs to the technical field of memories. The method is applied to a computer system. Computer system comprising a processor, Cache and first memory, Second memory and memory controller, the first memory is used for caching data in the second memory; wherein the cache is used for caching tags corresponding to part of cache blocks in the second partition; the second partition of the first memory is used for caching the cache block replaced from the first partition; one memory block in the second memory is mapped to one cache block of the first partition; mapping into a packet comprising a plurality of cache blocks of the second partition, The method comprises the steps that a processor obtains a physical address according to an access address in an access request, when it is determined that the access request hits a cache according to tag in the physical address, a memory access request carrying the physical address is sent to a memory controller, and the memory controller obtains data from a second partition according to the physical address. The performance of the computer system is improved.

The invention relates to a device and a method for synchronous updating of the map data in a handheld GPS terminal device. The device comprises a map database as well as a map data engine module and a synchronous module which are connected in turn, wherein, the synchronous module comprises a communication functional unit and an execution functional unit; the execution functional unit is connected with the map data engine module, while the communication functional unit is connected with the communication functional unit of an opposite terminal device through a data communication link. The method includes the following steps that: data communication connection is set up; a synchronous updating command is transmitted to an opposite terminal; the opposite terminal carries out command analysis; the map data engine module, which carries out map data searching and data extraction according to the type of the command, sends the results to the opposite terminal through the synchronous module, or completes map data insertion and reconstruction and updates system timestamp. The device and the method reduce system overhead and increase data exchange efficiency; moreover, user-defined data information is automatically protected from being covered by updated data according to requirements.

The embodiment of the invention provides a service data stream sending processing method and a service data stream sending processing device. The method comprises the following steps of: detecting a service data stream used by a user and according to a detection result, acquiring a PCC (Policy and Charging Control) rule corresponding to the service data stream from a PCC rule base in which the PCC rules are stored, wherein the PCC rule base comprises the PCC rule corresponding to each signed service of the user; if finding that QoS (Quality of Service) information in the PCC rule corresponding to the service data stream is inconsistent with that of a default bearer signed by the user by comparison, establishing a corresponding special bearer according to the QoS information in the PCC rule corresponding to the service data stream and sending the service data stream to the user by the special bearer. Incidence relations between services corresponding to all the stored PCC rules and the special bearers are prevented from being established; in the actual network operation process, each user can establish the special bearer according to the own actual requirements, so that waste of network resources is reduced.

The invention provides a method and a device for switching multi-antenna transmission modes, which is used for selecting an optimum transmission mode for a device, thus accelerating speed and reducing errors. The method for switching the multi-antenna transmission modes from transmit diversity (TD) to spatial multiplexing (SM) comprises the following steps: making statistics of a first accumulative value and/or a first continuous value of user equipment (UE) within preset time in the event that rank indication (RI) is more than 1; and when the first accumulative value is more than the threshold value and/or when the first continuous value is more than the threshold value, carrying out master switching so as to switch the multi-antenna transmission modes from the TD mode to the SM mode. In addition, the invention further provides the method and the device for switching the multi-antenna transmission modes from the SM mode to the TD mode.

The invention discloses a method and an apparatus for keeping music playing during web page switching. According to the method and the apparatus for keeping the music playing during web page switching, when web pages are switched, a handshake relationship is established between a playing control of a switched web page and a playing independence process called by a local terminal, the playing independence process performs forced continuous playing before a handshake relationship is established between the playing independence process and a new playing control, and the playing independence process plays current content continuously after the handshake relationship is established between the playing independence process and the new playing control. When the method and the apparatus for keeping the music playing during web page switching are used, the utilization of an iframe structure in the whole web station is not needed to achieved a music continuous playing function in web page switching, so that the system overhead and the burden of a browser is reduced and the fluency of web page displaying and music playing is improved.

The invention discloses a downlink virtual MIMO-NOMA method based on power and rate joint optimization. The method comprises the following steps: firstly, enabling a terminal node to form a pluralityof virtual array antenna clusters through an ad hoc network protocol, and enabling each cluster to report path loss and channel statistical characteristics to a base station; then, a system average throughput maximization problem is constructed on a base station side, and an alternate iterative optimization algorithm is utilized to perform joint optimization of power and rate; next, the base station feeds back NOMA decoding sequence information to each cluster, and uses precoding and superposition coding technologies to perform power domain multiplexing on multiple data streams requested by each cluster; and finally, segmenting the data volume by utilizing zero-breaking detection, and decoding the expected signal by utilizing a continuous interference elimination technology. Compared withthe traditional OMA, NOMA and virtual MIMO technologies, the method has the advantages that the system capacity can be remarkably improved and the cluster fairness is ensured at a high signal-to-noiseratio.

The invention is kind of voice call creating method in group data call activating state, which includes: MSC receives the voice call and determines the that the called MS is in group data call activating state, sends call application message to BS; BS receives the call application message including MS incrimination code and determines the MS is in group data call activating state, BS releases the group data call into sleep state; after the sleep state, BS call the called MS, and completes the creation of MS called voice call.

The invention relates to link failure detection techniques in the data communication field and discloses a method and system for detecting a multi-hop link. The multi-hop link is detected in an echo mode, system configuration is simplified, and system expenses are reduced. According to the technical scheme, the method includes the steps that A, a lower link terminal device establishes a multi-hop link detection message and transmits the detection message to an upper link terminal device through a port; B, the upper link terminal device analyzes the detection message after receiving the detection message to extract a source IP address and a target IP address of the message, a home terminal identifier field and an opposite terminal identifier field; C, the upper link terminal device carries out repackage on the received detection message, exchanges and fills the extracted source IP address and the extracted target IP address and exchanges and fills the extracted home terminal identifier field and the extracted opposite terminal identifier field; D, the upper link terminal device sends out the filled detection message after the head of a link layer is packaged. The system expenses can be effectively reduced through the method and system.

The embodiment of the invention relates to a communication method, master equipment, slave equipment and a unicast communication system in a unicast environment, wherein the method comprises the following steps of: receiving a keep-alive message sent by the slave equipment after the master equipment and at least one slave equipment pass through a unicaste negotiation of an informing message; determining the state efficiency of the slave equipment for transmitting the keep-alive message according to the keep-alive message; and sending the inform message to slave equipment of at least one slave equipment, the state of which is effective, in an unicast way according to the state effective information corresponding to the slave equipment and a unicast negotiation result of the inform message. With the embodiment of the invention, the master equipment can perceive whether the state of the slave equipment is effective or not and avoid the problem that the slave equipment still sends the inform message after off line, thereby saving resources and system expenditure.

The invention belongs to the fields of communication data authentication and privacy in a wireless network and provides a certificateless multi-proxy signcryption method with forward secrecy. An original signcrypter private key is constantly updated in a dynamic updating stage, and a proxy secret key is constantly updated too, a signcryption public key is unchanged in a whole process; furthermore, the private key is updated through a secrete key updating algorithm which is an one-way function; therefore, system overhead under a condition of higher security is reduced due to addition of a certificateless cryptosystem, thus meeting requirements of an original multi-proxy signcryption system on security, strong identifiability, public verification, strong non-repudiation and abuse resistance; in addition, the method can meet higher requirements on forward secrecy and strong unforgeability.

The invention relates to a dynamic monitoring method applied to a cloud platform. The dynamic monitoring method applied to the cloud platform comprises the following steps: A, collecting monitoring data of each monitoring node; B, performing security assessment on the monitoring data; C, dividing the security state into two kinds: continuous and discontinuous; D, building a security state change curve when the monitoring node of the continuous security state adjusts the monitoring frequency; E, calculating the slope of the curve; F, calculating the time for the next data acquisition of the monitoring node; G, segmenting the interval of the monitoring frequency when the monitoring node of discontinuous security state adjusts the monitoring frequency; H, calculating the difference between the last two security state values; and I, calculating the next data acquisition time according to the obtained difference and the time segments. By means of the dynamic monitoring method applied to the cloud platform, the monitoring frequency adjustment can be related to the change of the security state of the monitoring node, and the dynamic adjustment of monitoring frequency can be carried out accurately according to the change of the security state of the monitoring node, therefore, the security of the system is effectively guaranteed, and the impact of the monitoring on the system services is reduced.

The invention discloses an integral multiple frequency offset estimation method of an OFDM (orthogonal frequency division multiplexing) system with residual time bias, which solves the problems of low utilization rate of channel frequency spectrum and low accuracy in integral multiple frequency offset estimation in the prior art. The method specifically comprises the following steps of: (1) generating a training sequence according to performance requirement of the system, and storing the training sequence in a transmitting terminal and a receiving terminal; (2) performing fast Fourier transform on a received signal of which cyclic prefix is removed, thus obtaining a frequency domain signal of the received signal; (3) generating a cross-ambiguity function according to the receiving end frequency domain signal and a local training sequence; (4) forming a two-dimensional moment matrix according to Doppler slices of the cross-ambiguity function; and (5) traversing the two-dimensional moment matrix in the whole time delay and the frequency offset range to obtain an integral multiple frequency offset estimation value and a residual time bias estimation value. The method provided by the invention has the advantages of low system overhead, high accuracy in integral multiple frequency offset estimation and strong capability in resisting frequency-selective fading.

The embodiment of the invention discloses a method and a device for carrying out multi-event statistics on a performance monitoring unit. The method and the device are used for dynamically and accurately regulating even switching efficiency and improving accuracy of performance statistics on the premise of not modifying clock frequency of a system. The method disclosed by the embodiment of the invention comprises the following steps: after triggering a first register and a second register in a PMU (Power Management Unit) to carry out counting, monitoring whether the first register overflows; when determining that the first register overflows, initiating PMI interruption; in the PMI interruption, storing counting duration of each register on each performance events and a number of the performance events counted by each register, switching second performance events recorded by the second register, resetting the numbers of the performance events counted by the first register and the second register, retriggering the first register and the second register to count and finishing the PMI interruption; finally, carrying out statistics on the stored counting duration and number of each performance events every time to obtain a statistics result.

The present invention discloses a single-thread resetting method of a multicore-multithread processor, including the following operations: after start-up of a master kernel thread and a non-master kernel thread, the master kernel thread actively sends a heartbeat detection message to the non-master kernel thread. If a heartbeat reply from the non-master kernel thread is not received in the specified time, the master kernel thread sends a non-maskable interrupt to the non-master kernel thread, which, receiving the interrupt, transfers to the designated address and implements codes. According to the recorded information of non-master kernel thread, the master kernel thread reloads code segments, data segment, mapping relation between the physical address and physical virtual address space and sends start-up information to the non-master kernel thread. The resetting method introduced in the present invention has the following advantages such as a low system cost and short resetting time as well as non-interrupt to the other non-master kernel threads, greatly improving the system stability and reliability of the multicore-multithread processor.

The invention requires protecting a rapid calculating method of a sum of absolute transformed difference in video coding (SATD), relating to detection of image of distortion factor in the compression decoding technology. The invention obtains the SATD by simply summing or subtracting related elements of a partitioned matrix of a difference value image block in an original space domain or processes part of Hadamard transformation and calculates the SATD for the part of Hadamard transformation matrix, which saves (partly saves) a calculation process that processing the Hadamard transformation for the related elements of a partitioned matrix of a difference value image block in prior art. The rapid calculating method of the invention is capable of effectively reducing calculation amount of SATD, maintains the original features of the SATD completely. The invention can be applied to replacing the SAD way in the distortion factor measurement selected by the optimal coding way in the sub pixel movement estimation and low calculation complex.