162results about How to "Reduce data latency" patented technology

A dynamic upstream bandwidth allocation scheme is disclosed, i.e., limited sharing with traffic prediction (LSTP), to improve the bandwidth efficiency of upstream transmission over PONs. LSTP adopts the PON MAC control messages, and dynamically allocates bandwidth according to the on-line traffic load. The ONU bandwidth requirement includes the already buffered data and a prediction of the incoming data, thus reducing the frame delay and alleviating the data loss. ONUs are served by the OLT in a fixed order in LSTP to facilitate the traffic prediction. Each optical network unit (ONU) classifies its local traffic into three classes with descending priorities: expedited forwarding (EF), assured forwarding (AF), and best effort (BE). Data with higher priority replace data with lower priority when the buffer is full. In order to alleviate uncontrolled delay and unfair drop of the lower priority data, the priority-based scheduling is employed to deliver the buffered data in a particular transmission timeslot. The bandwidth allocation incorporates the service level agreements (SLAs) and the on-line traffic dynamics. The basic limited sharing with traffic prediction (LSTP) scheme is extended to serve the classified network traffic.

A distributed cache data system includes a cache adapter configured to reserve a designated portion of memory in at least one node in a networked cluster of machines as a contiguous space. The designated portion of memory forms a cache and the designated portion of memory includes data cells configured to store data. The cache adapter is configured to interface with the data and a distributed file system and the cache adapter is further configured to provide an interface for external clients to access the data. The cache adapter is configured to communicate to clients via a web server, and the cache adapter is further configured to direct data access requests to appropriate the data. A related process of distributing cache data is disclosed as well.

Systems, methods and computer program products that enable efficient roaming of virtual mobile devices. In one embodiment, multiple PoP locations having a set of common master images are maintained. A communication from a mobile device received at a central facility identifies a user, a location and a type of the mobile device. The central facility determines performance measures for the PoP locations and identifies a preferred PoP location in response to the communication. If the preferred PoP location has available capacity, the central facility directs the preferred PoP location to provision resources and instantiate a virtual device from a selected master image corresponding to the mobile device. If the preferred PoP location persistently stores a user data volume for the user, the virtual device is attached to the stored user data volume. Otherwise, data is transferred from the user's data volume to a cache attached to the virtual device.

The invention relates to a method for managing the mobility of a mobile node that moves to a different network, but keeps the same IP address. It is proposed to perform route optimization by a Proxy MIP agent on behalf of the MN, thereby shortening the data-path while allowing network-based mobility. At session setup with a correspondent node, the PCC system in the home network derides whether route optimization is to be performed for the communication session. The PMIPa requests relevant information for the route optimization, including the decision for route optimization and the addresses of MN and CN, from the PCC system in the home network, when the MN attaches to the new network area. Accordingly, route optimization is performed by using the Return Routability Procedure according to MIPv6, thereby applying the MN's IP address as Home Address, and the PMIPa's address as Care-of Address of the MN.

A system and method for pre-fetching data from system memory. A multi-core processor accesses a cache hit predictor concurrently with sending a memory request to a cache subsystem. The predictor has two tables. The first table is indexed by a portion of a memory address and provides a hit prediction based on a first counter value. The second table is indexed by a core number and provides a hit prediction based on a second counter value. If neither table predicts a hit, a pre-fetch request is sent to memory. In response to detecting said hit prediction is incorrect, the pre-fetch is cancelled.

A method for compressing borehole image data is disclosed. In one exemplary embodiment, the method includes acquiring image data downhole, selecting a block of the image data to compress, applying at least one filter to the block, selecting a subset of pixels from the block, and quantizing each of the subset of pixels. Exemplary methods in accordance with this invention may advantageously provide for sufficient data compression to enable conventional telemetry techniques to be utilized for transmitting borehole images to the surface in substantially real time. Moreover, exemplary methods in accordance with this invention reduce data latency and the susceptibility to telemetry errors as compared to the prior art.

A dynamic upstream bandwidth allocation scheme is disclosed, i.e., limited sharing with traffic prediction (LSTP), to improve the bandwidth efficiency of upstream transmission over PONs. LSTP adopts the PON MAC control messages, and dynamically allocates bandwidth according to the on-line traffic load. The ONU bandwidth requirement includes the already buffered data and a prediction of the incoming data, thus reducing the frame delay and alleviating the data loss. ONUs are served by the OLT in a fixed order in LSTP to facilitate the traffic prediction. Each optical network unit (ONU) classifies its local traffic into three classes with descending priorities: expedited forwarding (EF), assured forwarding (AF), and best effort (BE). Data with higher priority replace data with lower priority when the buffer is full. In order to alleviate uncontrolled delay and unfair drop of the lower priority data, the priority-based scheduling is employed to deliver the buffered data in a particular transmission timeslot. The bandwidth allocation incorporates the service level agreements (SLAs) and the on-line traffic dynamics. The basic limited sharing with traffic prediction (LSTP) scheme is extended to serve the classified network traffic.

The invention relates to a train overspeed protection method and a train. The method comprises the following steps: a train is used for broadcasting the location information of the train to other trains and receiving location information broadcast by other trains; the train is used for acquiring speed-limiting state information of the route, including the occupation state information of the train in each physical section of the route; and the train is used for calculating the movement authority of the train at current time according to the location information broadcast by other trains and the speed-limiting state information. Compared with the prior art that information is needed to be transmitted to the train after a region controller forwards the location information and calculates the movement authority, the technical scheme of the method has the advantages that the process of transmitting the movement authority and location information to the train by the region controller can be reduced, so that data waiting delay can be reduced, and overspeed control can be realized in time.

The reconfigurable circuit of the present invention in which time division multiple processing is possible has a pipeline structure with the number of stages of an integral multiple of a given number, and comprises a plurality of processor elements having a processing unit whose configuration is variable according to first configuration data to be supplied, a network in which all inputs and outputs of a plurality of said processor elements are connected and which transfers data by one clock between the input and output according to second configuration data to be supplied, and a switching unit which cyclically switches by one clock and supplies the first and second configuration data prepared for the given number of tasks to each of the processing units.

Provided is a data delivery method performed in a receiving apparatus of a mobile communication system. Protocol data units (PDUs) are received, and service data units (SDUs) are extracted from the received PDUs and delivered to an upper layer in real time. Alternatively, it is determined whether a PDU gap, in which PDUs are not received in sequence, has occurred on the basis of sequence numbers (SNs) of received PDUs, a reordering timer (t_Reordering) is started when a PDU gap has occurred, and at least one SDU is extracted from at least one PDU, which have been received already, and delivered to an upper layer of radio link control (RLC) when the reordering timer expires and no PDU corresponding to the PDU gap is received.

A gateway for interconnecting two networks, comprising a receiver, a controller, and a transmitter. The receiver receives from a first network a plurality of data units in all least one form. The controller temporarily stores the data units received by the receiver and outputs the data units on the basis of the dejitterizing capability of a destination terminal served by a second network, thereby reducing jitter among delays of the data units. The transmitter sends data units corresponding to the data units output by the controller to the destination terminal through the second network.

An information interaction method and device based on live broadcast video streams and a terminal device. The method includes the following steps: receiving video streams of a plurality of anchor members who perform live broadcast jointly, and synchronously synthesizing the video streams of the anchor members who perform live broadcast jointly and video streams of a local anchor member into a combined video stream to be uploaded; synthesizing a preset information graph layer in the combined video stream, wherein the information graph layer contains a plurality of graph layer components representing the number of votes to the anchor members from participating members, and each graph layer component is associated with one anchor member; obtaining a vote accumulated value of each anchor member from interaction data sent to a live broadcast interface by the participating members participating in live broadcast, and updating the graph layer components associated with the anchor members into graph layer components mapped by the vote accumulated values according to a preset mapping relation, so as to modify the display states of the graph layer components; and concurrently uploading the combined video stream with the synthesized information graph layer so as to push the combined video stream to a live broadcast room.

A system and method for providing bi-directional streaming communication over the HTTP or HTTPS protocol between a client and a server is disclosed. The method provides a long-lived, bi-directional communication mechanism from a web client that is performed entirely over HTTP or HTTPS, using existing HTTP verbs such as GET and POST, and is operable with existing browser and RIA technology. The graphical and networking features of RIA frameworks in conjunction with the disclosed method provide low-latency, real-time data applications in a web browser.

Disclosed is an optical access passive network supportive of quantum communication. The network is supportive of bidirectional data communication of a GPON (gigabit passive optical network) accordant with the ITU (International Telecommunication Union)-T G.984 standard or an EPON (Ethernet passive optical network) accordant with the IEEE802.3 (Institute of Electrical and Electronics Engineers) standard and quantum key distribution (QKD) of uplink direction. An improved optical network unit is adopted in the network to add a QKD emitter and an alternating time-division multiple-address access control module on a basis of an original GPON or EPON, an improved optical line terminal is adopted to add a QKD receiver and a clock extraction module on a basis of the original GPON or EPON, and an improved passive optical splitter is adopted and comprises two 1: N optical splitters and N Bragg gratings (N is the number of the optical network unit). The network integrally greatly avoids inferences, on quantum signals, of high-light signals to enable the QKD to be capable of coexisting with the GPON or EPON. The optical access passive network supportive of quantum communication can thoroughly improve potential security loopholes of common optical access networks and provides a feasible scheme for popularizing the quantum communication technology to a fiber to house (building) FTTx (fiber to the x) access network.

A method of controlling a connection of a station to different access points (AP) in roaming, in which the station is connected to a first AP through identification of basic service set context (BSS context), includes the following steps: a) Obtain received signal strength indications (RSSI) between the station and each access point. b) Copy the BSS context of the first AP to a second AP when the RSSI between the station and the first AP is less than RSSI between the station and the second AP; and c) disconnect the station from the first AP, and automatically connect the station to the second AP which has the same BSS context.

A system and method for providing real-time data to a Rich Internet Application is disclosed. The graphical and networking features of RIA frameworks in conjunction with at least one real-time data server provides low-latency, real-time data applications in a web browser. In one embodiment, data is produced at a data source, propagated to a server, and collected at the server. A persistent connection is created from a RIA to the server, and the RIA is subscribed to the data, wherein the subscribed data comprises at least some of the data collected at the server, and wherein the server propagates the subscribed data to the RIA through the persistent connection as the data is collected at the server.

The invention discloses an FC HBA (fiber channel host bus adapter) based on an SSD (solid state disk) cache and a design method thereof. An SSD memory is used as the buffer memory of the FC HBA, a server is communicated with the FC HBA through a PCIe (peripheral component interface express) interface, a memory device is communicated with the FC HBA through an FC interface; and the SSD buffer memory stores the transmitted data in a buffer manner, and the transmitted data includes the data transmitted between the server and the memory device, and the data transmitted between the memory device and another memory device. The SSD memory is used as the data cache of the FC HBA, namely a large-capacity high-speed buffer memory is provided for the FC HBA, the capacity of the buffer memory can reach 100 GB (gigabyte)-2TB(trillionbyte), or even a larger range. The server only needs to access to the SSD buffer memory in the FC HBA to obtain required data without accessing to the memory device, so that the data delay between the server and the memory device is reduced, and the IOPS (input / output operations per second) of the system is effectively improved. Besides, the SSD memory is used as the cache of the FC HBA, so that the transfer rate of stored network data is effectively improved.

The embodiment of the invention provides an uplink data sending method, an uplink data receiving method, a user terminal, and a network side device. The method comprises the following steps: receivingconfiguration signaling sent by the network side device, wherein the configuration signaling is used for configuring an unscheduled uplink resource to the user terminal; and sending uplink data to the network side device on the uplink resource. Therefore, when the user terminal sends the uplink data, the uplink scheduling of the network side device is not needed, therefore, by adoption of the uplink data sending method, the uplink data receiving method, the user terminal, and the network side device provided by the embodiment of the invention, the data delay and the signaling overhead can bereduced.

The present invention provides a liquid crystal display panel and a driving method thereof, in which the (4j)th and the (4j−3)th gate scan lines are arranged as first polarity gate scan lines and the (4j−1)th and the (4j−2)th gate scan lines are second polarity gate scan lines so that in driving the liquid crystal display panel, in a first half of frame for a frame period, a reversion signal (POL) controls the data lines to supply data signals of a first polarity, and the first polarity gate scan lines conduct first polarity scanning, in sequence from top to bottom, and in a second half of the frame, the reversion signal (POL) controls the data lines to supply data signals of a second polarity that is an opposite polarity, and the second polarity gate scan lines conduct second polarity scanning, in sequence from top to bottom, the reversion signal (POL) having a frequency equal to a frame frequency of the liquid crystal display panel, whereby the reversion frequency of the positive and negative polarity of the data signals can be greatly reduced, delays of the data signal can be effectively reduced, a charging effect to each of the sub-pixels can be ensured, a bright strip of a liquid crystal display panel having a dual gate structure can be eliminated, and driving power consumption can be lowered down.

The invention discloses a database processing method, device and system, and the method comprises the steps: enabling a main node to write a redo log record generated by a modification operation or awrite-in operation into a shared storage node when the main node executes the modification operation or the write-in operation of a data record, and updating a corresponding dirty data page to the shared storage node; and enabling the replica node to read the redo log record from the shared storage node into a memory, so that a data page can be reconstructed through the redo log record when needed. The deployment cost and the master-slave delay of the database for realizing read-write separation can be reduced.

The invention relates to a method for managing the mobility of a mobile node that moves to a different network, but keeps the same IP address. It is proposed to perform route optimization by a Proxy MIP agent on behalf of the MN, thereby shortening the data-path while allowing network-based mobility. At session setup with a correspondent node, the PCC system in the home network derides whether route optimization is to be performed for the communication session. The PMIPa requests relevant information for the route optimization, including the decision for route optimization and the addresses of MN and CN, from the PCC system in the home network, when the MN attaches to the new network area. Accordingly, route optimization is performed by using the Return Routability Procedure according to MIPv6, thereby applying the MN's IP address as Home Address, and the PMIPa's address as Care-of Address of the MN.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.The present invention provides a method of a base station for supporting an inter-system handover from an evolved packet system (EPS) system to a 5th generation (5G) system. The method comprises receiving, from an access and mobility management function (AMF), a handover request message including E-UTRAN radio access bearer (E-RAB) information and quality of service (Qos) flow information, identifying whether a protocol data unit (PDU) session is accepted or not, determining whether a data forwarding for at least one Qos flow associated with the PDU session is accepted or not based on the E-RAB information and the Qos flow information in case that the PDU session is accepted and transmitting, to the AMF, a handover request acknowledgement message including information on the at least one Qos flow based on the determination. The method solves the data forwarding problem during the movement of a UE between an LTE system and a 5G system, so that the loss of data is avoided and the continuity of services is ensured.

A multiuser detector based on iterative message passing algorithm relates to a rapid pseudo code acquisition method and a multiuser detector in marine radio navigation system, which solves the problems of serious sky-wave interference in the marine radio navigation system and difficulty in eliminating the sky-wave interference by conventional method. The detector comprises an interference cancellation structure with serial-parallel sub-groups, wherein signals are divided into a plurality of groups according to power, a parallel interference cancellation structure is adopted within each group, and a serial interference cancellation structure is adopted between the groups. Based on IMPA algorithm, the invention can acquire pseudo codes, which comprises the following steps: representing the constraint relationship of the pseudo code sequence by a factor graph, carrying out soft message iterative computation to obtain maximum a-posteriori estimation and generating a local sequence according to the maximum a-posteriori estimation and the decision condition. The invention shortens the acquisition time of long pseudo codes and effectively improves the acquisition probability, and can be applied in signal detection of satellite navigation, 4D mobile communication system, ultra-wide band system, etc.

The invention discloses a data processing method, device and system, an Nginx server and a medium, the method is applied to the Nginx server, the Nginx server obtains data from a cloud storage througha preset interface and caches the data to a local cache, and the method comprises the following steps: receiving a data access request sent by a client; calling a pre-established first mapping relationship; wherein the mapping relationship is a mapping relationship between the object storage data and local cache data; judging whether to-be-accessed data of the data access request exists in a local cache or not according to the first relationship; and if so, returning the to-be-accessed data to the end through the object storage format. The Nginx server can read the data stored in the cloud and cache the data to the local, for the data access request sent by the subsequent client, the data can be directly obtained from the local cache and returned, the data delay of communication from thefar end is omitted, and the online video playing has a smoother effect.

A packet switch including input ports having various input bandwidths initializes credit values for the input ports. An arbiter of the packet switch selects input ports based on the credit values and routes data packets from the selected input ports to a switch fabric of the packet switch. The switch fabric routes data packets from the selected input ports to output ports of the packet switch. Moreover, the arbiter modifies the credit value of each selected input port based on the latency for routing the data packet from the selected input port to the switch fabric. In this way, the arbiter promotes fairness in routing additional data packets through the packet switch. In some embodiments, the switch fabric includes a buffered crossbar and the arbiter modifies credit values of crosspoints in the buffered crossbar based on the latency for routing data packets from the crosspoints to the output ports.

The invention relates to a real-time video transmission method and system. The real-time video transmission method comprises the steps of, by a transmitting terminal, dividing a video stream into datapackets, transmitting the data packets sequentially, and recording the first transmitting time and the last transmitting time of the data packets; by a receiving terminal, receiving the data packets,judging whether packet loss, disorder and repeating of the data packets exist based on the serial number, and recording the serial number of the lost packets; by the receiving terminal, checking thelost data packets every a negative confirmation interval t1; if the lost data packets exist, packaging the serial number of the lost packets and a serial number range of the received data packets in anegative confirmation packet, and transmitting the negative confirmation packet to the transmitting terminal; checking the lost data packets every positive confirmation interval t2; if no packet is lost, packaging the serial number range of the received data packets in positive confirmation packet and transmitting the positive confirmation packet to the transmitting terminal; by the transmittingterminal, receiving confirmation packets from each receiving terminal and counting the received number and the lost number; judging whether retransmission is required; if yes, performing retransmission. By combining the positive confirmation mechanism and the negative confirmation mechanism, the real-time video transmission method and system can copy with sudden packet loss and data delay in a better manner.