194results about How to "Reduce power overhead" patented technology

The present invention provides a testing circuit and a testability design method thereof for an on-chip multinuclear processor; wherein, the testing circuit comprises a testing shell register chain, a chip core connecting circuit waiting to be tested, an on-chip data path connecting circuit and a control logic circuit. The chip core connecting circuit waiting to be tested is an interconnection circuit, which is connected between the testing shell register chain and the chip core waiting to be tested. The on-chip data path connecting circuit is the interconnection circuit which is connected between the testing shell register chain and the on-chip data path. The control logic circuit controls the data flow direction of the chip core connecting circuit waiting to be tested and the on-chip data path connecting circuit. The present invention conducts an optimum design according to the characteristics of the on-chip multinuclear processor. The bandwidth of the on-chip data path is fully used. The testing cost is reduced and the amount of a transmission data packet in the on-chip data path is reduced. So an extra power spending caused by mass active data packet is greatly reduced and the testing time is greatly shortened.

The present invention discloses a mask S box, a packet key calculation unit, an apparatus and corresponding construction method. The mask S box comprises an input module, an address mapping processing module, and an output module. The input module receives and uses a random number and input data masked by the random number as two inputs of the mask S box. The address mapping processing module performs one-to-one mapping on the two inputs and corresponding storage addresses in a memory of the mask S box. The output module performs linear processing on the random number by using a linear equation so as to obtain and uses the random number after linear conversion as one output of the mask S box. The storage address is obtained after the random number undergone linear conversion masks the output of the original S box, and is used as another output of the mask S box. The mask S box is safe, and further, the mask S box is easy to implement, is low in power consumption and small in area, and is optimized and expanded to realize the anti-high order DPA encryption device.

The present invention discloses an optimal energy efficiency-based antenna selection method for a multi-user and large-scale antenna relay system. The system comprises a plurality of information source users, a plurality of information sink users and a relay station, wherein the number of the information source users is equal to the number of the information sink users. The information source users and the information sink users are pairwise coupled and the information transmission between the information source users and the information sink users is realized via the relay station within two time slots. All information source users and information sink users in the system are respectively provided with a single antenna. The relay station is provided with an antenna array of a large-scale number illustrated in the drawings of the abstract. According to the technical scheme of the invention, in order to realize that the energy efficiency of the system is maximal, the antenna number of the relay station is adopted as an optimization variable for the establishment of a mathematical model. Since no clear analytical expression is available for a target function of the above optimization problem, an approximately accurate analytical expression for the target function of the optimization problem is figured out firstly based on the law of large numbers in the large dimensional random matrix theory. After that, based the quasi-concave characteristics of the optimization variable in the analytical expression, an optimal antenna number closed-form solution for realizing the optimal energy efficiency is finally solved out by means of the Lambert W function at the same time.

The invention discloses a wiring delay deviation fast calibration method of an arbitration-type PUF based on an FPGA. According to the technical scheme, fast calibration of delay deviation is achieved by an automatic adjusting circuit which is composed of one counter, one comparator, one dichotomy computing module and one excitation storage module. After input read signals become effective, the excitation storage module outputs stored excitations to the PUF from the first excitation to the last excitation, and afterwards sets excitation marking signals connected with the counter to be effective. When input adjusting completion signals become effective, the counter conducts zero clearing, and begins to conduct accumulative counting on responses of the PUF, and when the excitation marking signals become effective, the counter stops counting, and outputs transfers a counting result to the comparator, the comparator outputs adjusting marking signals for calculating the next adjustment stage to a dichotomy module according to the relation between the counting result and a given threshold value range. In the dichotomy computing module, the next adjustment stage is calculated, and the corresponding adjustment stage is output to be configured and applied in a delay adjustment block of the PUF. Then under the adjustment stage, excitations are input to the PUF again to conduct the next round of adjustment till a counting result is in a threshold value range in the comparator, and then the comparator outputs adjustment stage number marking signals. According to the wiring delay deviation fast calibration method of the arbitration-type PUF based on the FPGA, time consumed in the adjusting process of the PUF can be effectively shortened.

The invention provides a system on chip SOC and a memory access management method thereof, and aims at realizing the memory sharing of different processor subsystems in the SOC, and carrying out consistency management on a shared memory among the processor subsystems, so as to reduce the area and the power consumption of the SOC and realize the uniform management of the shared memory. The system on chip comprises the processor subsystems, the shared memory and a system memory management unit MMU, wherein the system MMU is connected between the processor subsystems and the shared memory and used for managing the access from the processor subsystems to the shared memory.

The invention provides an exception handling method and structure tolerant of missing cache and capable of emptying an assembly line quickly. The exception handling method includes the steps that firstly, a false hit state is defined, and the access result of the cache by invalid commands emptied by the assembly line is marked; correct command codes or data words are not guaranteed by the cache under the false hit state, and the corresponding cache information of access addresses is output directly; an assembly line emptying signal is directly acted on the command cache in the command taking operation in the false hit state to enable the false hit state to be selected when the invalid commands have access to the cache; when exception handling begins, data cache is selected and controlled through the assembly line emptying signal and the or logic of a storage access level invalid marking signal; when an exception occurs, the cache enters the false hit state to enable the assembly line to advance continuously. The invention further discloses the structure applying the exception handling method. By means of the exception handling method and structure tolerant of missing the cache and capable of emptying the assembly line quickly, the exception handling speed can be increased, and the real-time performance of the system is improved.

The invention discloses a fault-tolerant method aiming at TSV (Through Silicon Via) fault grading in 3D NoC (Network on Chip). According to the method, TSVs and data bits are respectively divided into four groups; if a TSV fault state value is within 6, the serial transmission among the groups and among data bits in the groups can be realized by using rest available TSVs; and otherwise, a localized fault-tolerant routing algorithm is used, and the address of the optimum TSV is found out from a locally stored TSV state table and is used as a temporary target address to be added to a data packet header for completing interlayer communication. According to the scheme of the method provided by the invention, the corresponding fault-tolerant method is selected through judging the fault grade of TSV links; higher reliability of the system is ensured; and meanwhile, the waste of available resources is reduced.

The invention discloses a vehicle networking resource allocation method, a device, a computing device and a storage medium, which relate to the vehicle networking field and are used for solving the problem that the power consumption of a fleet member is large due to the signaling interaction between the fleet member and a base station. In the method, a fleet member sends buffer status report information to a fleet head vehicle through a link side broadcast channel, and the fleet head vehicle sends an uplink scheduling request to a base station, thereby reducing the signaling interaction between the fleet member and the base station and reducing the power consumption overhead of the fleet member. At the same time, by transmitting the position information of the fleet head car and the virtual member of each fleet to the base station, the base station can allocate resources among each fleet, and the resources among each fleet can be reused, and the unnecessary signaling overhead can be reduced.

The invention comprises: at least one test enclosure register chain used for testing the core to be tested; an interconnection circuit for connecting said test enclosure register chain to the core to be tested; an interconnection circuit for connecting said test enclosure register chain to the external data channel. The invention also reveals a method for designing the test enclosure circuit.

The invention discloses a covering and controlling method of the wireless sensor network which adopts the covering judgment of multiple intersection points. The method carries out the distributed type node dynamic sleep control on the wireless sensor network via a redundancy judgment rule of the covering degree of the multiple intersection points. At the initial period of the network operation, each node is at the working status and periodically broadcasts the working message to the neighboring node, simultaneously collects the working information of all neighboring nodes; when one node receives the information from the neighboring node, the node carries out the redundancy qualification judgment, and keeps or transforms the status according to the judgment result for realizing the distributed type node dynamic sleep control of the sensor network. The method judges the redundancy of the network node according to the necessary and sufficient condition for avoiding the occurrence of the blind spot of covering, simultaneously enables the number of the active nodes to decrease to the minimum, decreases the power consumption of the system, prolongs the service life of the network, and realizes the coverage-configurable network covering and controlling which has the advantages of completeness, reliability and high efficiency.

The invention relates to the technical field of Internet of Things data transmission, in particular to an Internet of Things data transmission method and system, and the method comprises the followingsteps: S1, enabling a main node to transmit a data packet to a next-level sub-node directly connected with the main node; each stage of sub-node transmits a data packet to the next stage of sub-nodewhich is directly connected with the sub-node after completing data receiving; S2, enabling the main node to calculate the number proportion of the child nodes completing data receiving, and transmitdata packets to all levels of child nodes not completing data receiving after the number proportion reaches a preset value of the number proportion, wherein the to-be-transmitted data is upgraded data, and version upgrading is carried out after all levels of child nodes receive the upgraded data. According to the Internet of Things data transmission method and system provided by the invention, theproblems of network congestion, data loss and the like caused by the fact that the Internet of Things equipment distributes data to the network in the whole network can be solved, and the data transmission efficiency of the network is improved.

A multiple base station collaboration method, system and base station for use in cellular systems, relating to the field of wireless communications. Said multiple base station collaboration method comprises: during cellular system planning, forming a cluster out of a group of neighboring base stations, configuring one of same to be a primary base station and configuring the rest to be auxiliary base stations; during normal cellular system operation, monitoring devices corresponding to each of the auxiliary base stations update, in real time, statistics regarding the service volume of the cell areas corresponding to a given auxiliary base station, and upload the statistical service volume information to the primary base station; when the primary base station determines that the reported service volume received from the auxiliary base station is lower than a preconfigured first threshold value, service transfer operations are initiated for said auxiliary base station; after service transfer operations are complete, the primary base station uses the controller corresponding to said auxiliary base station to shut down said auxiliary base station. The above technical solution improves wireless system power consumption and interference and achieves significant gains in efficiency.

The invention discloses an Android screen always-on and energy-saving control method and system based on dynamic brightness adjustment. The method comprises the following steps: S1, when a user uses video play software, acquiring the using permission of a screen lock of an Android system, and controlling a screen to be in an always-on state in the use period of the software via the screen lock; S2, after the screen enters the always-on state, controlling the brightness of the screen in a high brightness state if the Android system is in a video playing state, or controlling the brightness of the screen in a low brightness state if the Android system is in a non-video playing state; and S3, unlocking the screen lock after use of the software is finished, so that the screen can recover a screen-off state normally. According to the method and the system, the brightness of the screen can be improved or lowered according to different video use conditions, so that power consumption can be reduced, and the standby time of a mobile phone can be prolonged; and the method can improve user experience.

The invention provides a temperature-insensitive clock buffer (TICB) and an H-shaped clock tree circuit. The TICB comprises a first phase inverter, a second phase inverter, a first NMOS tube and a second NMOS tube, wherein the output end of the first phase inverter is connected with the input end of the second phase inverter; the input end of the first phase inverter is used as the input end of the TICB, and the output end of the second phase inverter is used as the output end of the TICB; the drain of the first NMOS tube is connected with the input end of the first phase inverter, the grid of the first NMOS tube is connected with the output end of the first phase inverter, and the source of the first NMOS tube is connected with a low level; and the drain of the second NMOS tube is connected with the input end of the second phase inverter, the grid of the second NMOS tube is connected with the output end of the second phase inverter, and the source of the second NMOS tube is connected with the low level. The H-shaped clock tree circuit comprises a plurality of TICBs. The technical scheme of the invention can resist temperature deviation and reduce clock skew caused by non-uniform temperature distribution, thereby ensuring the performance of an integrated circuit.

The embodiment of the invention discloses a video processing method and device, a terminal and a storage medium. The method comprises the following steps: determining a first type of video segments from a target video; dividing the first type of video segments into a video scene segment set according to the similarity between the image frames included in the first type of video segments, wherein the similarity between the image frames included in the video scene segments in the video scene segment set meets a similarity condition; performing duration compression processing on each video scenesegment according to the duration threshold; and splicing the video scene segments subjected to the duration compression processing to obtain a compressed first-type video segment, and splicing a second-type video segment included in the target video and the compressed first-type video segment according to a video playing sequence to obtain a compressed target video. According to the embodiment ofthe invention, intelligent duration compression processing on the target video is realized.

The invention discloses a digital-analog mixed signal processing system for imprecise computation, comprising an input module used for decomposing A B-bit digital input signals into A*B single-bit high- and low-level signals and sending the high- and low-level signals to a signal processing module as analog input signals, the signal processing module used for calculating the analog input signals to obtain C analog output signals and sending the analog output signals to an output module, and the output module used for converting the analog output signals into D high- and low-level signals and outputting the D high- and low-level signals as E F-bit digital signals, wherein D, E and F are natural numbers, and D=E*F. The digital-analog mixed signal processing system for imprecise computation has the advantages as follows: the area and power consumption of a computing system on a conversion interface are reduced effectively, and interface design is greatly simplified; and the area is reduced by more than 50%, the energy consumption is reduced by more than 60%, and the application space of the system of the type is significantly improved.