545results about How to "Improve data transfer performance" patented technology

The invention relates to a method and a system for monitoring and position determination of objects and/or living beings within an area, such as, e.g. a room in a building. The system comprises a plurality of electronic units, called identification tags, which are attached to the objects that have to be monitored. Each identification tag has its own identification code (ID code) and is equipped with an ultrasonic transmitter, radio transmitter and radio receiver. The ultrasonic signals are recieved by one or more master and slave units which calculate transit time differences of ultrasonic pulses. This information together with the identification tags' ID code, identification of the room in which it is located, and any additional information are transmitted to a central processing unit which calculates the identification tag's position and presents it to a user of the system.

The invention discloses a method for switching base stations for user equipment (UE), the base stations and the UE, and relates to a mobile communication system deployed in a heterogeneous network. The method for switching the base stations for the UE includes the steps that when the main base station of the double-link UE is switched, and the target base station determines that the UE keeps connection with the secondary base station and configuration; the target base station builds connection with the UE while the UE keeps connection with the secondary base station and configuration. The invention further discloses other three methods for switching the base stations for the UE and the corresponding base stations and UE. According to the technical scheme, when the UE transmits data and/or moves, the user interface of the UE and the connected secondary base station will not be interrupted when the main base station connected to the UE is changed, and namely data transmission can continue. Thus, the performance and handing capacity of data transmission of the UE are improved, and the use efficiency of wireless resources is improved.

The present invention provides an apparatus and method for sensing subsurface data. One embodiment of the invention comprises a shuttle attached to a conveyance where the conveyance and shuttle are adapted to be spooled downhole into a borehole for sensing seismic data. The shuttle contains a sensor package that is preferably acoustically isolated in the shuttle. The sensor package includes a sensor array and a magnet clamp. A sensor section can contain several shuttles, each shuttle containing at least one sensor. In one embodiment, the sensor can be a fiber optic sensor. The magnet clamp is operable to controllably clamp and acoustically couple together the sensor package, the shuttle, and the adjacent structure which is typically the borehole casing. The magnet clamp is likewise operable to unclamp and uncouple the shuttle from the adjacent structure so as to be retracted uphole for subsequent use.

A method and system for implementing weighted fair flow control on a metropolitan area network. Weighted fair flow control is implemented using a plurality of metro packet switches (MPS), each including a respective plurality of virtual queues and a respective plurality of per flow queues. Each MPS accepts data from a respective plurality of local input flows. Each local input flow has a respective quality of service (QoS) associated therewith. The data of the local input flows are queued using the per flow queues, with each input flow having its respective per flow queue. Each virtual queue maintains a track of the flow rate of its respective local input flow. Data is transmitted from the local input flows of each MPS across a communications channel of the network and the bandwidth of the communications channel is allocated in accordance with the QoS of each local input flow. The QoS is used to determine the rate of transmission of the local input flow from the per flow queue to the communications channel. This implements an efficient weighted bandwidth utilization of the communications channel. Among the plurality of MPS, bandwidth of the communications channel is allocated by throttling the rate at which data is transmitted from an upstream MPS with respect to the rate at which data is transmitted from a downstream MPS, thereby implementing a weighted fair bandwidth utilization of the communications channel.

The invention provides a sending method and a receiving method of an uploading demodulating pilot frequency, a base station and a moving relay. The sending method comprises that the base station sends configuration information of uploading demodulation reference signal (DMRS) on a downloading passing-back chain path to the moving relay; the configuration information comprises information used for indicating positions of an uploading DMRS symbol, wherein the number of SC-FDMA symbols occupied by the uploading DMRS symbol in the time domain direction of a sub-frame is larger than 2; the base station detects PUSCH from an uploading passing-back chain path, and receives the uploading DMRS sent by the moving relay from the PUSCH according to the configuration information of the uploading DMRS; and the base station uses the received DMRS to demodulate. Because the uploading demodulating pilot frequency is repeatedly designed, accuracy of channel estimation of a relay pass-back chain path is improved under a high-speed moving condition.

A method, system and computer program for transferring packets between devices connected to a PCI-Express bus of a computer. A selected pair of devices, such as for example a root complex device and an endpoint device or a pair of endpoint devices, connected to the PCI-Express bus, are configured to transmit/receive data with their respective maximum payload size (MPS). A packet, such as for example a read completion packet, a write memory packet or a message request packet, can then be transmitted from the source device to the destination device. If the source device MPS exceeds the destination device MPS, the packet can be divided into a plurality of sub-packets. Each of sub packets has a maxmimum payload size based on the MPS of the destination device. The sub-packets can then be transmitted to the destination device so that the packet can be delivered to the destination device.

The invention relates to a water environment monitoring system based on ZigBee wireless technology. The current monitoring usually uses a way of wired transmission, which results in difficult routing and high cost. The water environment monitoring system of the invention comprises a plurality of water environment monitoring nodes which are distributed in water environment monitoring regions and a data and video base station, wherein, the water environment monitoring node is based on the ZigBee wireless technology and comprises a node microprocessor module, a node ZigBee radio frequency module CC2420 radio frequency chip, a power management module and a water quality parameter collection module. The data and video base station uses the structure of ARM-DSP dual processors and comprises a base station ZigBee radio frequency module CC2420 radio frequency chip, CDMA transmission module HUAWEI-CM320, a video signal collection module and a microprocessor module. The water environment monitoring system of the invention can simultaneously collect a plurality of parameters of water quality, and has the advantages of strong data communication capacity and wide network coverage area. Moreover, the water environment monitoring system of the invention can realize real-time collection, processing and wireless transmission of video signals.

The invention relates to the communication field data transmission, in particular to an Internet protocol security (IPSEC) tunnel data transmission method and an IPSEC tunnel data transmission device. The invention provides the IPSEC tunnel data transmission method and the IPSEC tunnel data transmission device. Due to the fact that IP messages of the same kind are combined and compressed through a coprocessor and the like, an IPSEC tunnel model data are packaged to send by an outer network card. Due to the fact that after fragmentation IP message data are rebuilt, the coprocessor is uncompressed and the like, the rebuilt IP message data are divided into each different original IP message and sent through an inner network card, and a data transmission performance of an IPSEC tunnel can be largely improved. Data processing is carried out through the networks, a network data receiver and a network data sending device. The IPSEC tunnel data transmission method and the IPSEC tunnel data transmission device are mainly used in the field of the IPSEC tunnel data transmission.

A computing system and encryption/decryption method realizes assurance of security and improvement of throughput in a remote system. For this purpose, encrypted data is written to a storage system, it is determined whether data in the storage system is ciphertext or plaintext, and encrypted data is read, decrypted and re-written in storage asyncronously with writing encrypted data to storage.

The invention concerns a method and an apparatus for device-to-device communication route establishment within a mobile communication system. In the method a mobile node determines that a remote node is within radio coverage of the mobile node. The mobile node determines a need to transmit a data message to a destination node. The mobile node transmits a request message to the base station. In reply the mobile node receives a message including a route to the destination node. The route includes at least an identifier of the remote node. The mobile node obtains a radio resource for radio communication between the mobile node and the remote node from the base station. Thereupon, the mobile node transmits the data message to the remote node using the radio resource obtained.

An reconfigurable array of variable conductive elements is provided for reflecting, filtering and steering electromagnetic radiation across a wide range of frequencies. The reconfigurable array is combined with a transmitting antenna to make a steerable antenna. The reconfigurable array surrounds the transmitting antenna and reflects all transmissions except on selected radials where apertures in the reconfigurable array are formed for permitting transmission lobes. The reconfigurable arrays can be arranged in stacked layers to make transceiving multiband antennas. Communications networks using the steerable antennas and arrays are also disclosed.

The invention discloses a web page cross-domain communication method and device. The method includes the steps that a first page with a first root domain name loads a second webpage with a second root domain name in the first page in an embedding mode; the second page adds target data from the second root domain name into a preset third page and skips to the third page, and the root domain name of the third page is the first root domain name; the third page extracts the contained target data from the second root domain name and stores the target data in storage space which the pages with the first root domain name can have access to; the first page reads the target data from the second root domain name from the storage space. The communication between the cross-domain web pages in a browser is achieved, cross-domain file transmission, data sharing and data synchronization can be achieved, meanwhile, the development cost is lowered, and the problem that different root domain names are mutually embedded is solved.

The embodiment of the invention discloses a method and a device for updating contract signing and configuration of an access point name. The method comprises the following steps: receiving an updating request massage sent by a network element, wherein the updating request massage comprises first access point name APN information, PDNGW information of a grouped data network gate and identification IMSI of an international mobile station; acquiring second APN information corresponding to a user according to the IMSI; when the first APN information is different from the second APN information, and the corresponding user is signed with a wild card APN, for updating the signing configuration of the wild card APN of the corresponding user according to the first APN information. The embodiment of the invention can reduce the unnecessary signaling interactive operation between signed server of the affiliation user and other network elements, can improve network data transmission performance, and reduce the unnecessary expense of affiliation user server.

The invention provides a method and device for transmitting data. The method and device for transmitting data is applicable to distributed type file systems. The method for transmitting data includes: a client side is used for confirming storage nodes for storing data by interacting with management nodes; the client side generates secret keys for encrypting the data, the secret keys are used for encrypting the data, and the encrypted data are transmitted the storage nodes for storing the data; the secret keys are transmitted to storage nodes through a secret key transmission step which includes: the client side encrypts the secret keys to obtain the encrypted secret keys and transmits the encrypted secret keys to the management nodes; and the management node decrypts the encrypted secret keys to obtain the secret keys and transmits the secret keys to the storage nodes for storing the data. By means of the technical scheme, safety of the data in transmission can be improved, and simultaneously good data transmission performance can be kept.

The invention discloses a routing method for data transmission in a space delay/disruption tolerant network. The routing method comprises the following steps: (1) searching for a static route: if no static route exists, executing dynamic route calculation; and (2) calculating a dynamic route: calculating the dynamic route according to a source node for transmitting data and a destination node by the following substeps: (2.1) calculating the minimum delay route; (2.2) testing the capacity of the route; and (2.3) selecting a next-hop node: comparing delays of all the selected routes, and selecting the minimum delay route. According to the invention, the routing method is based on space delay/disruption tolerant network capacity constraints of a node contact relational graph in the network, and the minimum delay route from the source node to the destination node can be calculated by precognizing a contact relation graph among nodes in the running process of the whole network and data streams among node pairs, so that the throughput of the whole network can be increased, the space node resources can be saved, and higher network performance can be obtained.

The invention discloses a multicore optical fiber connector which comprises a plug assembly and a socket assembly. The plug assembly is formed by an insulation casing and a plurality of plug inserting core assemblies, wherein each plug inserting core assembly comprises a ceramic inserting core seat, a spring, a spring blocking unit, a ceramic inserting core and a ceramic sleeve. The socket assembly is formed by an insulation casing and a socket inserting core assembly. The multicore optical fiber connector is characterized in that an outer spring is sleeved outside each plug inserting core assembly in the plug assembly, the front end of the plug inserting core assembly is provided with a plug front outer casing, the front end of the plug front outer casing is sleeved outside each ceramic sleeve, the tail end of the plug front outer casing is connected with each spring blocking unit, the outer edges of the spring blocking unit and the plug front outer casing are provided with annular protrusions respectively, and the outer spring is arranged between the two annular protrusions. According to the multicore optical fiber connector, the outer spring is sleeved outside each plug inserting core assembly so that axial and radial floating between the plug front outer casings and internal parts can be achieved, and insertion loss and return loss are avoided.

The invention discloses an in-device coexistence interference coordination method and device, user equipment and communication equipment. The in-device coexistence interference coordination method includes the steps: receiving an in-device coexistence IDC interference report reported by the user equipment, wherein the IDC interference report carries IDC interference information of the user equipment in an EN-DC scene, and the IDC interference information is used to indicate interference parameters of IDC interference; determining information for IDC interference coordination, based on the IDCinterference report; and sending the information for IDC interference coordination to the user equipment. The technical solution of the in-device coexistence interference coordination method can actively report the IDC interference report when the IDC interference occurs in the EN-DC scene, so as to perform IDC interference coordination, based on the information for the IDC coordinated interference, configured by the base station, thus improving the data transmission performance of the user equipment.

The embodiment of the invention discloses a network packet loss processing method and a network packet loss processing device, which relate to the field of communication. The method comprises the following steps that when packet loss events occur, the current congestion window value of a network is compared with the buffer threshold; the buffer threshold is used for representing the data carrying capability of the whole network and is obtained by adding the data carrying capability of links in the network to the data carrying capability of node buffer regions in the network; if the current congestion window value is smaller than the buffer threshold, the current packet loss event is determined not to be caused by the congestion packet loss, and the back-off processing is not carried out on the current congestion window; and if the current congestion window value is greater than or equal to the buffer threshold, the current packet loss event is determined to be caused by the congestion packet loss, and the back-off processing is carried out on the current congestion window. Through the embodiment of the invention, the data transmission performance can be improved in the high-packet-loss-rate network environment.

The embodiment of the invention relates to the field of communication technology, disclosing a method, related equipment and a system for measuring channel state information, wherein the method for measuring the channel state information comprises the steps that: a terminal receives rank information sent by a base station, wherein the rank information is used for measuring the channel state information; the terminal measures the channel state information by using the rank information; and the terminal reports the measured channel state information to the base station. By implementing the embodiment of the invention, the accuracy of channel state information reported by the terminal can by improved, so that the deviation in the transmission way for sending data to the terminal determined by the base station is reduced, and that the data transmission capacity of the system is improved.