109results about How to "Improve latency performance" patented technology

A method of storing a file in a memory. An explicit command is issued to a file system to store the file in accordance with a desired performance characteristic of the file such as enhanced write performance, enhanced read performance or enhanced latency performance. The file system stores the file in the memory in accordance with the desired performance characteristic. Preferably the desired performance characteristic is achieved by storing the file in a physically contiguous portion of the memory or in a logically contiguous portion of the memory. After the explicit command has been issued for each of a plurality of files, the files may be stored concurrently.

The invention belongs to the technical field of the communication 5G and the edge computing, specifically an edge computing method for a 5G ultra-dense networking scene. The basic thought of the invention is to provide the edge computing service for a cellular user of a microcell by placing a MEC sever at a small base station; and meanwhile, the cellular user can select the cloud computing service connected with a macro base station according to the feature of the to-be-executed task. The edge computing method disclosed by the invention has the advantages that the user can select the most suitable computing service, and the delay performance is improved.

Each computing node of a distributed computing system may implement a hardware mechanism at the network interface for message driven prefetching of application data. For example, a parallel data-intensive application that employs function shipping may distribute respective portions of a large data set to main memory on multiple computing nodes. The application may send messages to one of the computing nodes referencing data that is stored locally on the node. For each received message, the network interface on the recipient node may extract the reference, initiate the prefetching of referenced data into a local cache (e.g., an LLC), and then store the message for subsequent interpretation and processing by a local processor core. When the processor core retrieves a stored message for processing, the referenced data may already be in the LLC, avoiding a CPU stall while retrieving it from memory. The hardware mechanism may be configured via software.

The utility model relates to a distributed contention control backoff method for wireless local network based on probability P, belonging to the wireless communication technology. The method is based on the basic idea of executing backoff on the basis of nodes; by executing carrier monitoring mechanism, the nodes estimate the network congestion status; the time slot utilization ration is calculated according to the time slot number when the channel is busy and the total time slot number passed in the backoff process, and the congestion degree probability P is thereby determined; a value of the contention window of the nodes is arranged according to the value of the probability P and the node random number; each time after the nodes is sent successfully, the probability P is used to judge whether the contention window is turned into the minimum value; therefore, unnecessary collision is avoided. When collision occurs in the channel, the value of the contention window is doubled until the maximum value is achieved; then the value of a backoff counter is determined according to the contention window, and the collision of the network data is thereby controlled. The utility model is based on the present IEEE802.11 standard protocol, and no other hardware requirement is needed; the utility model is in complete distribution mode; the throughput, the time delay and other functions of the utility model are all superior to the prior backoff methods.

A communication unit comprises a receiver for receiving a message sent on an allocation channel, packet identifying logic, capable of identifying a data type of the received message, operably coupled to buffer logic for buffering data packets to be sent to the second communication unit. In an active mode of operation, the receiver of the communication unit is capable of intermittently receiving the message sent on the allocation channel and transition to continuously receive the message sent on the allocation channel in response to either: the buffer logic identifying that data packets are to be transferred to the second communication unit; or the packet identifying logic receiving a communication resource allocation message and identifying resource allocation data therein.

The invention discloses a service flow shaping method and a service flow shaping device for a cascaded port of an avionics full duplex switched Ethernet (AFDX) switch. The main problems of relatively stronger switching delay jitter of packets and incapability of transmitting high-priority packets on time in the prior art are solved, and a system can be conveniently cascaded. The method comprises the following steps of: (1) extracting packet scheduling information; (2) extracting the information of a time registry; (3) receiving and scheduling the packets; (4) selecting and sequencing the packets; (5) updating time tags; (6) transmitting and scheduling the packets; and (7) updating a time registry. The device comprises an input caching module, a receiving scheduling module, a time registry module, a packet information storage area module, a time tag module, an output queue module, a transmission scheduling module and an output caching module. The method and the device have the advantages that: the determinacy of the delay jitter of the packets can be ensured; the forwarding delay jitter of the packets can be effectively reduced; the high-priority packets can be transmitted on time; and the method and the device are applied to the traffic shaping of the AFDX switch.

The invention discloses a user level protocol and QoS (Quality of Service) based dynamic wavelength bandwidth distribution method in a WDM-EPON (Wavelength Division Multiplexing-Ethernet Passive Optical Network). The user level protocol and QoS based dynamic wavelength bandwidth distribution method in the WDM-EPON comprises the steps of: extending a frame structure in an existing MPCP (Multi-Point Control Protocol) and enabling an OLT (Optical Line Terminal) to support multiple uplink wavelengths by using the extended MPCP; dividing services into three levels, .i.e., an EF service, an AF service and a BE service, wherein the EF service is firstly subjected to online real-time scheduling, and the bandwidth distributed to the EF service is a requested bandwidth and transmitted on an appointed wavelength; setting minimum guaranteed bandwidths for the AF and BE services based on the user levels (a high-level user, a middle-level user and a low-level user) and carrying out offline scheduling, to be specific, firstly, scheduling the AF / BE service of the senior user (first scheduling the AF service and then scheduling the BE service), and then scheduling the AF / BE services of the middle-level user and the low-level user according to the following sequence (the AF service of the middle-level user, the AF service of the low-level user, the BE service of the middle-level user and the BE service of the low-level user). According to the dynamic wavelength bandwidth distribution method, the time delay can be reduced, and the bandwidth utilization rate and the QoS of the user with high priority are improved.

The invention discloses a hopping beam resource allocation method and system based on deep reinforcement learning, a storage medium and equipment, and belongs to the technical field of communication. In order to solve the problem that the time delay performance of different service volumes is poor due to the fact that an existing beam-hopping satellite communication system lacks continuity when a service scene changes continuously during resource allocation, ground service requests are divided into a real-time data service and a non-real-time data service, and optimization functions are established respectively; then the maximum effective time length Tth of data in the satellite buffer is divided into M equal-length segments, and the M equal-length segments correspond to M hopping beam time slots; a ground cell service volume request formed by data packet time delay, the number of real-time data packets and non-real-time data packets is taken as an environment state S, a satellite beam is taken as an intelligent agent, cell illumination is taken as an action, and an optimization problem of resource allocation in a satellite beam hopping technology is taken as a Markov decision process; and hopping beam resource allocation is conducted based on the deep Q network. The method and system is mainly used for allocating hopping beam resources.

A disclosed method for assigning a touch identification in a multi-touch sensitive display device is includes applying a touch driving signal to touch sensors of a touch screen and generating raw touch data, detecting touch points based on the raw touch data and respectively assigning temporary identifications (IDs) to the touch points, grouping the touch points based on a difference in distances between the touch points to form touch groups, and forming adaptive touch groups respectively based on the touch groups. The method also includes setting a comparison block including one or more of the adaptive touch groups contacting or overlapping each other, and matching the temporary ID assigned to one of the touch points within the comparison block in the current frame to one of a plurality of touch IDs within the comparison block in a previous frame.

The invention provides an underground state determination method and device and a state control method and device. The underground state comprises an overflow state, a leakage state and a non-overflow and non-leakage state. The underground state determination method comprises collecting pumped drilling liquid flow parameters and real-time flow parameters of the returned drilling liquid, wherein the real-time flow parameters comprise the instantaneous quality, the instantaneous volume flow and the density of the drilling liquid; determining the instantaneous quality, the instantaneous volume flow and density change values of the pumped drilling liquid and the returned drilling liquid according to the pumped drilling liquid flow parameters and the flow parameters of the returned drilling liquid; determining the real-time underground state according to the instantaneous quality, the instantaneous volume flow and the density change values of the pumped drilling liquid and the returned drilling liquid. According to the underground state determination method and device and the state control method and device, the three parameter methods are matched with each other, meanwhile the influence of the time is considered, the instantaneous analysis, the static correction and the long time observation are performed on the parameters, and accordingly the accuracy of the judgment result can be ensured.

A cellulose acylate film is provided and is excellent in increasability of an in-plane retardation and a retardation in a thickness direction, from which an additive does not bleed out, and which is excellent in surface properties. The cellulose acylate film has a thickness of 40 μm to 180 μm and contains no retardation increasing agent. Retardation values Re and Rth of the cellulose acylate film meet the following formulae (III) to (V): 46≦Re≦100  (III) Rth=a−5.9Re  (IV) 520≦a≦670  (V) A polarizing plate and a VA mode liquid crystal display having wide viewing angle characteristics and small changes in color, which are using the cellulose acylate film, are provided.

The invention provides an unmanned aerial vehicle and user collaborative cache placement method and device, and the method comprises the steps: obtaining the cache placement information of an unmannedaerial vehicle through adoption of an alternating direction multiplier method, and carrying out the iteration of the cache placement information of a user through a global greedy algorithm; continuously iterating the unmanned aerial vehicle cache placement and the user cache placement, and judging whether the maximum number of iterations is reached or not; if the number of iterations does not reach the maximum number, adding 1 to the number of iterations, and iterating the unmanned aerial vehicle cache placement information and the user cache placement information again; and if the number ofiterations reaches the maximum number, outputting cache placement information of the unmanned aerial vehicle and the user at the moment. According to the technical scheme provided by the embodiment ofthe invention, the technical problem that the unmanned aerial vehicle with the caching capability and the user caching placement decision are not jointly optimized in the prior art can be solved.

The invention provides a task peer-to-peer unloading method and a task peer-to-peer unloading device in a multi-access edge computing system. In the multi-access edge computing MEC system, an MEC server is deployed on a baseband unit pool side to construct edge clouds, and the edge clouds are interconnected through a metropolitan area optical network. The task peer-to-peer unloading method comprises the following steps of: determining a task needing peer-to-peer unloading based on a task delay value in a local server of user equipment; selecting an unloading target MEC server for the task needing peer-to-peer unloading based on a genetic algorithm, and allocating routing resources and spectrum resources to the task needing peer-to-peer unloading; and based on a proportional fairness method, allocating computing resources to the task needing to be unloaded to the target MEC server in a peer-to-peer mode and the tasks in the local MEC server. The task peer-to-peer unloading method provided by the embodiment of the invention improves the delay performance of the task and the utilization rate of system resources.

The invention provides a discrete speed cross-layer power distribution method suitable for a distribution type antenna system which relates to a cross-layer power distribution method suitable for a single subdistrict distribution type antenna system among each user. In the distribution type antenna system, a suitable power is distributed to each user for completing an operation transmitting from point to point. The method obtains a queue state information of a data link layer and a channel state information of a physical layer in condition of assuming a base station only using finite discrete transmitting speed, then processes cross-layer power distribution by using a throughput a coefficient of improved particle group arithmetic optimizing system and a fairness coefficient. The discrete transmitting speed assuming is more coincided with factual system, the distribution type antenna system uses the cross-layer distribution method that can improve system queue time delay performance, system throughput performance and system fairness performance.

The invention provides a wireless network route establishment method based on an ant colony algorithm. According to the method, information elements in the ant colony algorithm are adjusted. Three parameters of residual energy, path consumption energy and hop count are normalized into a route performance evaluation value for assignment. A source node broadcasts a route request. Backward information element tables are generated in the process of arriving at a destination node by a route request ant FANT. The destination node receives the FANT and generates a route response ant BANT. The BANT calculates a probability of selecting a next hop neighbor node through values of the backward information element tables. One-time self iteration is carried out on information element values corresponding to original information element tables by employing the highest value in the information element tables. The finally selected information element value corresponding to a next hop node is increased. Moreover, the information element values of the unselected nodes are decreased. Continuous iteration is carried until route establishment is finished. According to the method, the residual energy of each node is balanced through adoption of a multi-measure route discovering mode, and the service life of a network is prolonged.

The invention belongs to the technical field of equipment maintenance or management, and discloses an aircraft formation hierarchical network access management method and system. The management methodincludes the following steps: initializing aircraft formation network parameters; identifying aircraft node capability state information; defining node comprehensive property parameter indexes by using the node capability state information; constructing a whole network node capability visibility graph according to the comprehensive property parameter indexes; selecting a formation network accessinitiation node according to the consideration of the node capability visibility graph and the geographical location area; completing control information interaction between the network access initiation node and a main topology central control node according to the principle of minimum hop count and a sleep state multipath way-finding mode based on geographic location information; and carrying out information in a formation after the network access initiation node receives network access response so as to make the nodes update a local information field to finish the formation network access.According to the invention, maximum network access efficiency is obtained with lowest cost, the comprehensive performance of formation network access is improved, network communication QoS needs are guaranteed, and the task completion efficiency and quality are improved.

The invention discloses a social perception D2D collaborative caching method based on deep Q learning, and aims to solve the problem of link congestion caused by redundant content transmission in a network. The method comprises the following steps: step 1, initializing a communication scene; 2, performing multi-attribute modeling on the social relation strength of the equipment owner; step 3, modeling a D2D cooperative caching process based on a reinforcement learning process; step 4, designing a network structure of a Behavior network for training and a Target network for calculation in the deep Q network; and step 5, based on a set system model, utilizing a deep reinforcement learning algorithm to enable the intelligent agent and the environment to interact to carry out iterative learning to output an optimal strategy, namely, an optimal decision of equipment cache resource allocation and D2D content distribution. According to the technology, normal communication of cellular users can be ensured, the average time delay of the system can be minimized on the premise of meeting personal willingness of the users, and the satisfaction degree of the users is improved to the maximum extent.

The invention relates to a multi-dimensional resource joint allocation method for a multi-beam satellite co-frequency networking system, and belongs to the technical field of satellite communication. The method comprises the following steps: modeling a downlink data transmission scene in a multi-beam satellite same-frequency networking system, performing full-frequency multiplexing on frequency resources of satellites in the scene, performing joint allocation of time slots, bandwidths and power resources of users according to user-level resource allocation, modeling an allocation process as a Markov process, using a multi-beam satellite communication system as an environment state, inputting a near-end strategy optimization PPO network for interaction, selecting a user to be served in a current time slot by using the PPO network, and allocating bandwidth and power resources to the user. According to the method disclosed by the invention, the coordinated scheduling user is selected in each time slot and the frequency and power resources are reasonably allocated for the user, so that relatively small co-frequency interference between the users is kept in a full-frequency multiplexing scene, the data transmission rate in the co-frequency multiplexing scene is improved, and the purpose of minimizing the system time delay is achieved.

Embodiments of the present invention disclose a channel accessing method and a channel accessing device, wherein, a channel accessing method includes: acquiring a public frequency hopping sequence for channel accessing; performing full time slot perception on a channel indicated by a first element of the public frequency hopping sequence; and if the state of the channel indicated by the first element is idle, starting from the channel accessing time slot and the second element, selecting a channel indicated by the next element of the public frequency hopping sequence to perform channel accessing successively in the next time slot based on the time slot order and the element order of the public frequency hopping sequence; wherein, the channel accessing time slot is a time slot next to the time slot determining the state of the channel indicated by the first element is idle, and the second element is an element next to the first element in the public frequency hopping sequence. The technical solution provided in the present invention can increase the service delay performance of the secondary user on the premise that a large amount of information interactive overhead is avoided.

The invention relates to an inter-cluster quick communication method for a wireless sensor network, which comprises that: a chain communication channel is formed among cluster heads; at the beginning of the communication of each time, a source cluster head pre-transmits a short pre-engagement packet (RP) and quickly transmits the pre-engagement packet to a convergent node along a multi-hop link consisting of the cluster heads, and when the RP passes through each intermediate cluster head, the intermediate cluster heads write the number of data packets needing transmitting in the communication into corresponding fields in the RP; after receiving the RP, the convergent node replies a pre-engagement confirmation packet (CP) and transmits the pre-engagement confirmation packet back to the source cluster head issuing a request along an inverse path, and the cluster heads receiving the CP along the inverse path rationally schedule sleeping and communication processes according to the numbers of the data packets per se needing transmitting; and a multi-hop transmission channel is formed among the cluster heads and data is quickly transmitted to the convergent node by adopting a mode similar to a multi-stage production line. The inter-cluster quick communication method has the advantages of effectively improving inter-cluster communication efficiency and reducing transmission delay and energy consumption to a relatively greater extent.

A method of storing a file in a memory. An explicit command is issued to a file system to store the file in accordance with a desired performance characteristic of the file such as enhanced write performance, enhanced read performance or enhanced latency performance. The file system stores the file in the memory in accordance with the desired performance characteristic. Preferably the desired performance characteristic is achieved by storing the file in a physically contiguous portion of the memory or in a logically contiguous portion of the memory. After the explicit command has been issued for each of a plurality of files, the files may be stored concurrently.

The invention discloses a sucker device for waterproof board construction and a tunnel waterproof board construction method. The sucker device comprises a sucker body made by a soft material, and a fixing member, a protruding handle is arranged on the back of the sucker body, the sucker body is connected at one end of the fixing member through the handle, a fastener hole is arranged at the other end of the fixing member, and an adhesive is coated on the adsorption surface of the sucker body. During laying, geotechnical cloth is laid on a tunnel profile face, the fixing member of the sucker device is fixed outside the geotechnical cloth by enabling a fastener to penetrate the fastener hole, the handle of the sucker device is connected on the fixing member in a clamped manner, release paper on the surface of the sucker body is torn off, a waterproof board is upwards jacked and pressed on the sucker body of the sucker device to enable the sucker body to suck the waterproof board, and then the waterproof board is fixedly connected to complete laying of the waterproof board. The waterproof board can be fixed by only pressing the waterproof board on the sucker device when the waterproof board is lifted by adopting the sucker device, so that steps for welding and fixing the waterproof board are not needed.

The invention provides a method for feeding downlink data. The method includes that a base station judges whether uplink control channel resources are required to be configured for secondary cells SCell or not according to a time division duplex (TDD) configuration of a primary cell PCell and the secondary cells SCell of user equipment (UE), and configures the uplink control channel resources for the secondary cells SCell required to be configured with the uplink control channel resources; the UE judges whether the base station configures the uplink control channel resources for the secondary cells SCell or not when the downlink data are fed, and the downlink data are fed via the uplink control channel resources if the base station configures the uplink control channel resources for the secondary cells SCell; and the downlink data are fed by uplink control channel resources which are configured for the primary cell PCell by the base station if the base station does not configure the uplink control channel resources for the secondary cells SCell. The invention further provides a device for implementing the method. The method and the device have the advantages that a round-trip time (RTT) delay of a downlink hybrid automatic retransmission request of a system can be greatly shortened, and the performance of the system and the user experience are improved.

The invention discloses an implementation method and system of a blockchain distribution network, and the method comprises the steps: enabling each node to measure the connection quality between the node and other peer nodes, and enabling the obtained link state information to be shared with the peer nodes; calculating network topology information according to the link state information, and calculating an adjacent bandwidth resource index of each node; segmenting the network topological graph into k parts, and selecting a node with the highest adjacent bandwidth resource index in each part; taking the nodes as root nodes, and generating a transmission scheduling scheme of the broadcast tree and the non-leaf nodes; issuing a corresponding routing and transmission scheduling method to eachnode, and when broadcasting needs to be carried out in a block chain network, enabling the node to delegate a message to a root node and then carry out broadcasting according to a broadcasting tree. Meanwhile, a corresponding terminal and a medium are provided. According to the invention, through the design and sending planning of the blockchain distribution network, the broadcast delay and message complexity overhead in the blockchain network are reduced, and an efficient, reliable and universal broadcast protocol is provided for a blockchain system.

The invention discloses a method for optimizing the access to a wireless sensor network channel based on a mixed MAC protocol. The mixed MAC protocol is obtained by mixing a CSMA / CA protocol and a TDMA protocol. The method for optimizing the access to the wireless sensor network channel includes the steps that firstly, sensor nodes in a wireless sensor network with high loads are divided into multiple sets; secondly, the sets have the access to the channel based on the mixed MAC protocol, wherein the sensor nodes in each set independently have the access to the channel in a CSMA / CA protocol competing manner, and the sensor nodes among the sets share and have the access to the channel in a TDMA protocol scheduling mode. In addition, the invention discloses a system for optimizing the access to the wireless sensor network channel based on the mixed MAC protocol. According to the method and system for optimizing the access to the wireless sensor network channel based on the mixed MAC protocol, the channel is used for sending data, the time delay performance of the network can be improved, the handling capacity of the network is improved, energy consumption of the sensor nodes is reduced, the access fairness is improved, and the access expansibility is improved.

The invention provides an adaptive dynamic perception routing for the Internet-of-vehicles driving environment, which comprises a driving behavior perception prediction module, a communication coverage radius prediction module, a dynamic beacon period environment adaptive adjustment module, an opportunity weight selection forwarding module and an environment adaptive dynamic perception routing protocol, wherein the driving behavior perception prediction module is used for dynamically predicting the vehicle location by using vehicle driving historical information; the communication coverage radius prediction module is used for calculating the effective communication coverage radius; the dynamic beacon period environment adaptive adjustment module is used for dynamically adjusting the beaconperiod of a neighbor discovery message frame; and the opportunity weight selection forwarding module is used for calculating opportunity weight values of vehicle nodes in all neighbor location tablesand selecting a vehicle with the maximum opportunity weight value for forwarding and delivery. The adaptive dynamic perception routing can effectively alleviate a problem of performance deteriorationof the packet delivery ratio of routing data packets due to dynamic changes of the vehicle traffic environments such as the vehicle density and driving speed in complex traffic environments such as urban blocks and expressways, obviously improves the routing performance of the Internet of vehicles, provides the low-delay and high-reliable forwarding quality and improves the connectivity of the Internet of vehicles.

The invention provides a method used by a server to send a message to a client in an NAT network. The method comprises the steps that a UDP-S service is turned on in the server to communicate with the client; the client sends a UDP data packet to the UDP-S service of the server to establish a server cache information table; the server judges whether the client is located within the internal network defined by an NAT gateway according to the UDP data packet and returns the client identity; the client responds to the client identity to establish a UDP communication channel between the server and the client; and the server calls the UDP-S service according to the server cache information table to send the message to the client through the UDP communication channel. According to the invention, the bandwidth of the server side is saved, and the communication channel is easily established.

The invention discloses a method and a device for carrying out feedback on downlink data. Feedback time sequence information for carrying out feedback on the downlink data can be adaptively changed when the processing time of UE is shortened. The method comprises the steps of determining the processing capability of the UE, wherein the processing capability refers to processing of the received downlink data by the UE to determine whether the processing time consumed by retransmission is needed; and determining the feedback time sequence information for carrying out feedback on the downlink data of the UE according to the determined processing capability.