749results about How to "Improve communication reliability" patented technology

A method of operating multiple time alignment timers (TimeAlignmentTimer) is provided for facilitating communication between and evolved Node B (eNB) and a User Equipment (UE) in a Long Term Evolution (LTE) system supporting multiple carriers. The method includes starting a first TAT of a first group including the primary cell, starting a second TAT when Timing Advance (TA) information on a second group not including the primary cell; and determining transmission of at least one of a Hybrid Automatic Repeat Request Acknowledgement / Negative-acknowledgement (HARQ ACK / NACK), a physical uplink control channel, and a sounding reference signal according to a start and an expiration of at least one of the first and second TATs.

Methods, apparatus, and products for routing frames in a shortest path computer network for a multi-homed legacy bridge, wherein the network includes a plurality of bridges. At least two of the plurality of bridges operate as edge bridges through which the frames ingress and egress the network. A first edge bridge identifies a legacy bridge nickname for a legacy bridge connected to the network through the first edge bridge and a second edge bridge using active-active link aggregation. The first bridge receives a frame from the legacy bridge and determines, in dependence upon the frame's destination node address, an egress bridge nickname for a third bridge through which a destination node connects to the network. The first bridge then adds the legacy bridge nickname and the egress bridge nickname to the frame and routes the frame to the third bridge in dependence upon the egress bridge nickname.

A powerline network system having data relay function includes a plurality of power monitoring zones mutually connected with a powerline network and at least one repeater. Each of the power monitoring zones has at least one power monitoring device. The repeater is connected with each power monitoring device in two adjacent power monitoring zones through powerlines and has a first and a second relay units. The first and second relay units employ two different sets of transmitting and receiving bands to fetch data contained in powerline signals transmitted by each power monitor in adjacent power monitoring zones. The data are received by a relay unit are modulated with different transmitting band and then transmitted to powerlines of another power monitoring zone. The repeaters are not required to be serially connected to the powerlines, and incorrect data read can be also eliminated.

A power distribution monitoring system includes a number of power line mounted monitors. Each monitor can acquire data regarding the delivery of electrical power in the power line, wirelessly transmit and receive messages, and electromagnetically acquire and store operating electrical power from electrical current flowing in the power line. The system also includes an aggregator that can wirelessly transmit and receive messages and wirelessly output beacon messages. In response to beacon signals wirelessly output by the aggregator, each monitor co-acts with the aggregator to dynamically build a wireless communication network for the wireless communication of the data acquired by the monitor regarding the delivery of electrical power in the power line to the aggregator.

A system and method for providing a communication port integral with a battery pack assembly is disclosed. The system provides a pathway between an external unit and a host unit via a printed circuit board of the battery pack. The battery pack can include communication ports mounted on the printed circuit board for interfacing with external units. The printed circuit board further includes a substrate(s) formed with a predetermined wiring pattern electrically and / or mechanically joined to the CPU of the host unit, as well as the battery cell(s).

A multi-hop wireless Ad-Hoc network according to the present invention employs a voice reservation protocol. The protocol supports voice and data communication and incorporates retransmission and acknowledgement mechanisms. A TDMA frame architecture is dynamically selected depending on voice mode operation (e.g., simplex / duplex) and associated retransmission / acknowledgement mechanisms. A source node transmits a reservation packet that embeds TDMA frame architecture and other information. The packet is transmitted to a destination node and is further piggybacked on existing neighbor discovery packets to reduce overhead. Each intermediate network node along the propagation path determines the manner in which to accomplish slot reservation based on the embedded information in the reservation packet. The protocol may use separate dedicated channels or a single channel for voice and data, and supports voice / data load balancing over different channels. In addition, the protocol may utilize speech silence and increased communication reliability to enhance performance.

Disclosed is a system and method for intelligent traffic control using wireless sensor and actuator networks. The system comprises a control center, M regional gateways, and N sensor and actuator nodes. The N sensor and actuator nodes and L cluster heads form L clusters. Each cluster includes a cluster head and at least a sensor and actuator node. The control center, the M regional gateways, and the N sensor and actuator nodes form a multi-layer structure. Each N sensor and actuator node may real-time detect traffic states, and exchange information with other nodes via a wireless communication having a self-recovery function. The system and method applies a distributed computing strategy to automatically adjust the traffic control on each traffic flow, thereby achieving an efficient traffic control.

A method of communicating data in a system having a plurality of transmitters each adapted to transmit a radio signal, and a receiver situated at a distance from the transmitters to receive and process the signals transmitted by the transmitters, information for transmission being subdivided into N-bit symbols, the method consisting in:giving a numerical value to each symbol; andcompressing the data using a CHIP encoding technique in which the values of the symbols are transposed to an encoded value having x digits in a base B, each digit subsequently being represented in the form of n chips, the base B, the number n of chips, and the number x of digits for an encoded value satisfying the following conditions: so that the total number of chips x.n representing the coded value is less than 2.N.

An apparatus for monitoring a mobile object comprising a strap suitable for engaging with a portion of said mobile object. The strap said strap comprises a tamper-detection assembly, a transceiving assembly suitable for two-way communication, and a tamper-resistant housing. The tamper resistant housing is configured to secure the transceiving assembly. The tamper resistant housing further secures a first end and a second end of the strap with the portion of the mobile object and the housing comprises a partitioning assembly suitable for partitioning the strap.

A route is selected in a wireless cooperative relay network of nodes. A decoding order is initialized. A set of resources is minimized subject to constraints. The resources are allocated to the nodes in the decoding order. The decoding order is changed iteratively to further minimize the allocated resources, until a minimum is reached. A code word is transmitted when the allocated resources are at the minimum, which can either be determined globally or locally at each node. The method can operate in a centralized or distributed manner.

An inductive power transfer system comprises a power transmitter (101) and a power receiver (105). The power transmission system supports two-way communications. The power receiver (105) first initiates a mandatory configuration phase by transmitting a signal strength package and the power transmitter and receiver then operates (505, 507) the mandatory configuration phase wherein a first set of power transfer operating parameters are selected for the power transmitter (101) and the power receiver (105). The power receiver (105) subsequently transmits (509) a request to enter a negotiation phase and the power transmitter (101) acknowledges (511) the request by transmitting an acknowledgement. It then enters the negotiation phase. The power receiver (105) enters the negotiation phase in response to receiving the acknowledgment message. The power receiver (105) and power transmitter (101) then determines (513, 515) a second set of operating parameters by performing the negotiation phase. The approach is particularly suitable for a Qi power transfer system.

A transmission system which can flexibly set / change VC mode and, in case of fault, can reset the VC mode to continue communication. A transmit-side VC mode setting unit sets a VC mode according to upper-level setting or path fault information. A transmit-side signal control unit controls signals in the VC mode. A path monitoring / setting unit generates a specific pattern. A first signal transmitting / receiving unit transmits the VC mode and the specific pattern to a remote device, and receives path fault information from the remote device. A second signal transmitting / receiving unit detects the VC mode and the specific pattern and transmits path fault information to the remote device. A receive-side VC mode setting unit sets the received VC mode. A receive-side signal control unit controls signals in the VC mode. Based on the specific pattern, a path monitoring / determination unit generates the path fault information indicative of a path connection determination result.

The invention discloses a full digitalized distributed intelligent servo driver which adopts a full digitalized DSP (Digital Signal Processor) + FPGA (Field Programmable Gate Array) structure. The intelligent servo driver provided by the invention integrates the functions of motion control, motor control and a simple PLC (Programmable Logic Controller) and can conveniently construct a motion control system without an upper computer motion controller (card). The intelligent servo driver can be used for controlling and driving a direct current brush (brushless) motor, an alternating current servo motor and a linear motor only through software configuration without changing hardware. The intelligent servo driver can realize the following operation modes: A. an RS232 network control mode; B. an RS485 distributed network control mode; C. an independent driver running mode without the upper computer; D. a pulse command running mode; and E. an analog signal running mode. The servo driver provided in the invention adopts a modularized structure, the same control module can be matched with driving modules of different power levels to form intelligent servo driving systems of different power levels. By utilizing the full digitalized distributed intelligent servo driver, a motion control system with the advantages of low cost, flexible system configuration, simpleness and convenience for operation, reliable performance and convenience of maintenance can be realized.

The present invention relates to an interface for programmable logic controllers and expansion modules, and comprises a main module and a plurality of extension modules, the present invention is characterized in that a four-line standard SPI interface wire and two digital logic lines are used: a control line of the bus is interrupted, while the bus for forming the interface of the control line is connected in order; the double-way communication of the main module and all expansion modules are in token-control. In the process of the system initialization, the present invention can automatically complete the address distribution of every expansion module, and can finish the control and double-communication of data and information between the main module and a plurality of expansion modules, and can realize the input, output and functional expansion of a programmable logic controller. The present invention has the advantages that the present invention successfully realizes the communication interface function between the programmable logic controller and the expansion modules, completes the double-way of data and control characters, and has the automatic distribution function of addresses of the expansion modules; in addition, the present invention can effectively solve the conflicts during communication, and can improve the communication efficiency and reliability between the programmable controller as well as the expansion modules.

The invention discloses an intelligent monitoring system of a dangerous goods container transported by a ship, comprising an on-board automatic monitoring system, a remote transmission system and a monitoring center, wherein, the on-board automatic monitoring system realizes the real time perception of the on-board container condition by utilizing a monitoring terminal, a relay terminal and a convergence terminal for converging data arranged on the door of the container, transmits the collected condition information of the container to the remote monitoring center through a remote transmission system, and realizes the processing and alarming functions and the like of the collected condition information of the container at the front end. Through the networking of the monitoring terminal of the container based on a ZigBee technique, the system provided by the system solves the problem that the communication is temporarily interrupted caused by that the signals are shielded when a radio frequency identification device (RFID) or a general packet radio service (GPRS) / a global system for mobile communication (GSM), or a satellite is directly adopted as a communication module in the existing container monitoring system; and the system provided by the invention has the characteristics of high reliability and low communication cost and being easy to monitor, and provides an effective solution scheme for intelligently monitoring the dangerous goods container.

One example embodiment includes a method for constructing a unified namespace carried out by a domain manager service executing on a domain node in a domain network comprised of domain nodes. The method includes establishing a single, hierarchical domain tree that encompasses digital computers in a distributed data service network, where the domain manager service sends a request to all domain member nodes requesting that each domain node export the root of its sub-domain to the domain manager. The method also includes receiving the exported sub-domain roots. The method further includes grafting onto a domain root of the domain manager service the received exported sub-domain roots.

The invention discloses a load balancing method of virtual machines, related equipment and a trunking system. The network performance of the trunking system can be improved after load balancing. According to certain feasible execution modes, the method includes the steps that a management node determines a plurality of virtual machines in which load balancing is needed in the trunking system; according to the network flow relation among the virtual machines, the virtual machines are integrated into at least one virtual machine cluster, so that the network flow between each virtual machine and at least one other virtual machine in the same virtual machine cluster is larger than or equal to a network flow threshold value, and the network flow between each virtual machine and any other virtual machine in the different virtual machine cluster is smaller than the network flow threshold value; migration suggestions are generated, and the migration suggestions are used for instructing all the virtual machines included in each virtual machine cluster to be migrated or hosted to the same target computational node; the migration suggestions are sent to source computational nodes hosted by one or more virtual machines included in each virtual machine cluster.

The invention describes a flow control method to control HS-DSCH data streams over UTRAN Iub and Iur interfaces. Two credit assignment schemes are also described. A radio network node at which the flow control method executes is proposed. Finally a computer program product for execution of the flow control method and the credit assignment schemes is described. The control of separate user data flows is coordinated by Node-B and data transport over the Iub and Iur interfaces is adapted to data transfer over the Uu interface. The main advantage is that buffering can be primarily maintained in SRNC. It is shown that the proposed flow control method can significantly reduce Node-B's buffer level when compared to a scheme where the control of individual data flows is performed independently of each other. It is also shown that the negative impact on the quantity of flowing data is generally minor.

A method, information processing system, and wireless communication system schedules transmission of data packets in a wireless communication network. At least one selected data packet to be retransmitted to at least one respective receiver (108) is identified. At least one respective selected data packet is scheduled for retransmission (620) in a set of available transmission slots to at least one respective receiver (108). The scheduling is performed prior to determining a failure of a previous communication of the selected data packet and in response to the identifying.

The embodiments of the invention provide an unmanned aerial vehicle / motor control device and method. The motor control method comprises the following steps: acquiring current attitude information of the load, target attitude information of the load and current operation parameter information of one or more motors on the load, and obtaining control information for controlling the one or more motors according to the current attitude information, the target attitude information and the current operation parameter information; transmitting the control information to a shared memory for storage; and reading the control information from the shared memory and controlling the operation of one or more motors according to the control information. A motor control device according to the invention does not need connection of cables or PCB wiring, thereby reducing hardware size; the motor control device is directly implemented inside a chip through a shared memory, thereby improving the speed and stability of data interaction between a main control unit and an executing unit. Further, a correlation algorithm is adopted for ensuring the no reduction of motor and pan-tilt control frequency and accuracy.

A method of operating a device capable of periodically hopping a predetermined interval using a channel hopping sequence in order to improve low radio frequency (RF) reliability caused by single frequency based channel access.

The invention discloses a method, device, system and equipment for controlling intelligent household equipment. The method comprises the following steps that: the intelligent household equipment receives a radio broadcast message including identification information; the intelligent household equipment judges whether the identification information is stored unique identification information of wearable equipment or not; and the intelligent household equipment performs a pre-set control instruction when the identification information is the stored unique identification information, so that the original working state of the intelligent household equipment is switched into an intelligent working state. By means of the technical scheme provided by the invention, the intelligentization and the automation of the intelligent household equipment can be improved; user operations are simplified easily; and user experience is improved easily.

One example embodiment includes a method for constructing a unified namespace carried out by a domain manager service executing on a domain node in a domain network comprised of domain nodes. The method includes establishing a single, hierarchical domain tree that encompasses digital computers in a distributed data service network, where the domain manager service sends a request to all domain member nodes requesting that each domain node export the root of its sub-domain to the domain manager. The method also includes receiving the exported sub-domain roots. The method further includes grafting onto a domain root of the domain manager service the received exported sub-domain roots.

The invention relates to a method for solving an internet protocol address assignment conflict and a related device and a system; wherein, the method for solving the internet protocol address assignment conflict comprises the steps of using a relay device to receive a request message used for requiring to distribute an internet protocol IP address sent by a user terminal; transmitting the request message to a dynamic host configuration protocol server; receiving a request response message sent by the dynamic host configuration protocol server, wherein, the request response message carries an IP address distributed to the user terminal by the dynamic host configuration protocol server; according to user online information, detecting whether the IP address exists an assignment conflict, if yes, ending the request response message and noticing the dynamic host configuration protocol server that the IP address is conflicting. By using the technical scheme provided by the embodiment of the invention, the IP address assignment conflict problem of a DHCP server can be solved, and accordingly, the system communication reliability is improved.

In the case of a system where a communication device is remote-controlled from a control server, depending on timing when an entry is written into a forwarding table of the communication device from the control server, there is a possibility that a loop and discard of the traffic occur. Therefore, for registration, rewriting and deletion of the entry of the forwarding table which are performed on the communication device 102 by the control server 101; the communication device 102 verifies contents of control instructions from the control server 101; the communication device 102 holds the result of this verification; the control server 101 acquires the result of the verification; the control server 101 judges whether or not a series of controls can be executed based on the results of the verification from the plurality of communication devices 102; and then the control server 101 invokes the execution at the plurality of communication devices 102.

The invention discloses a data transmission system and method for transmitting underground measurement-while-drilling data to the ground. The data transmission system comprises a drill stem equipped with a well-logging-measurement-while-drilling tool, and a throwing-while-drilling pup joint accommodating a microstorage, wherein the throwing-while-drilling pup joint comprises a housing, a control circuit and a wireless transmit-receive device; the drill stem is sleeved with the housing, and a clearance space is formed between the drill stem and the housing; and under the action of a microstorage release command sent by the control circuit, the throwing-while-drilling pup joint releases the microstorage loaded with the underground measurement data to the ground. The data transmission system for transmitting the underground measurement-while-drilling data to the ground greatly improves the data transmission rate and the communication reliability; and as only slurry is used as a transmission medium of the microstorage, extra cost is not needed, and the normal drilling process is not influenced.

The invention relates to a downhole safety monitoring system for mines and in particular relates to a monitoring control system for a mobile rescue capsule or a fixed refuge chamber. The monitoring control system comprises a host sub-system, as well as a monitoring sub-system, a control sub-system and a communication sub-system which are connected with the host sub-system, wherein a host device of the host sub-system is connected with various detection sensors through intelligent interfaces to form the monitoring sub-system; the host device is connected with various environmental control devices through intelligent interfaces to form the control sub-system; and the host device is connected with a video device, a voice communication device and a networking system through intelligent interfaces to form the communication sub-system. According to the monitoring control system, various parameter sensor data and personnel number information can be collected in real time, the survival environment parameters are monitored and automatically regulated, and the monitoring data and the voice and video information are transmitted to a ground monitoring center and a control command is received by virtue of a downhole transmission network, so that the downhole safety monitoring system for mines is an essential core system of guaranteeing downhole safe production and emergency rescue of coal mines and non-coal mines.

The invention belongs to a control technology, and particularly relates to an estimating device and a method which are used for a battery level of a battery arranged on a special vehicle. A digital single chip central processing unit (CPU) which integrates an analog to digital (AD) interface, an integrated optics (IO) interface and a serial peripheral interface (SPI), a Twin controller area network (CAN) interface and a serial port serial control interface (SCI) as a whole is adopted, thereby facilitating the expansion of the external devices. Double CAN buses of a data communication unit are mutually used as back-ups, after errors of one of the buses occur, the other of the buses works, and therefore communication reliability of the device and an upper computer is improved. The estimating device fully considers specialties of the special vehicle, adopts a modularized design concept, and is easy to maintain, low in cost, high in reliability, and easy to operate. Power up time difference between this time and last time is calculated, an initial value of electrical quantity of a storage battery can be ensured and calculated through an interpolation checking table, and a state equation and an observation equation are rapidly built in an off-line mode. A coefficient n, determined through the interpolation checking table, of a Peukert equation and battery available capacity calculated through charge discharge efficiency eta are closer to actual using battery capacity, and estimated electric quantity of a storage battery is more precise.