138results about How to "Improve communication bandwidth" patented technology

In a WDM type PON system, each ONU comprises an optical transmitter capable to transmit optical signals with variable wavelengths, an optical signal receiving filter variable its receiving wavelength, and a control unit. An OLT selects in response to a wavelength allocation request from each ONU, a transmitting wavelength and a receiving wavelength out of currently free wavelengths and allocates these wavelengths to the requester ONT. The control unit of the ONU switches the transmitting wavelength of the optical transmitter and the receiving wavelength of the optical signal receiving filter to the wavelengths specified in a response message from the OLT and starts data communication.

A method for concurrently communicating over each phase of an electrical power distribution network (N). A first outbound signal (SO1) is transmitted over one phase (AN-A) of a bus (S) by an outbound modulation unit. The unit is released as soon as the first outbound signal (SO1) is transmitted so the unit can transmit a second outbound signal (SO2) over a second phase (BN-B or CN-C) of the bus. The second outbound signal is transmitted concurrently with an inbound signal (IB1) sent in response to the first outbound signal (SO1). The unit is again released, as soon as the second outbound signal (SO2) is transmitted, so the unit can transmit a third outbound signal (SO3) over the third phase (BN-B or CN-C) of the bus. This third outbound signal is transmitted concurrently with a second inbound signal (IB2) sent in response to the second outbound signal (SO2). The method allows concurrent communications over all three phases of the network (N).

A receiver for coherent detection of a PSK modulated optical carrier includes an optical detector, digital-to-analog converters, and a digital module. The optical detector is configured to mix the modulated optical carrier with two phase components of a reference optical carrier and to produce analog output signals representative of optical signals produced by said mixing. The digital-to-analog converters are connected to receive the analog output signals and to produce digital signals from the received analog output signals. The digital module is connected to receive the digital signals and to perform one of compensating the received digital signals for a conjugate phase misalignment between the mixed components, extracting phase of the received digital signals, and estimating a frequency offset between the two carriers from the received digital signals.

The particular status of a Multiple Network Interface Mobile Device (MID) is identified and particular problems associated with that status are addressed by activating different modes of operation depending upon whether the MID is stationary or in motion. In particular, when the mobile device is in motion, the multiple network interfaces are used to prevent packet loss, and when the mobile device becomes stationary, the multiple network interfaces are used to enhance bandwidth to achieve superior Quality of Service (QoS). MIDs thus are allowed to utilize multiple interfaces simultaneously for bandwidth incremental increases if the mobile device is stationary. MIDs also are allowed to utilize multiple interfaces simultaneously for packet loss recovery and smooth and seamless transitioning from one interface to another when the mobile device is in motion.

A telecommunications system provides mobile internet protocol related communications services to mobile nodes via a plurality of access networks. A mobility manager directs a change of affiliation of a first mobile node between the access networks, or a change of communications session level of the mobile node, in accordance with the congestion state of the access networks, the link quality currently experienced by the mobile node, applications server messages and the level of service quality to which the first mobile node has subscribed. A quality of service for communications sessions of a mobile nodes can be maintained even on unregulated access networks, such as Wireless Local Area Networks (WLAN) independently of a Mobile IP v4 / v6 stack. Moreover congested access networks can be decongested by controlling the communications bandwidth used by the mobile nodes.

The invention provides a carrier aggregation radio-frequency circuit comprising a radio frequency transceiver, a first front-end network, a second front-end network, a first antenna and a second antenna. The first antenna is connected with the radio frequency transceiver electrically by the first front-end network to form a first receiving-transmitting access. The second antenna is connected with the radio frequency transceiver electrically by the second front-end network to form a second receiving-transmitting access. The first receiving-transmitting access and the second receiving-transmitting access are used for realizing carrier aggregation of a first frequency band and a second frequency band and are used for carrier aggregation of a third frequency band and a fourth frequency band. Ina addition, the invention also provides a communication terminal using the carrier aggregation radio-frequency circuit. With the carrier aggregation radio-frequency circuit, carrier aggregation of multiple frequency bands can be realized, thereby improving the communication bandwidth of the communication terminal.

An coherent transceiver includes a single silicon photonics substrate configured to integrate a laser diode chip flip-mounted and coupled with a wavelength tuning section to provide a laser output with tuned wavelengths which is split in X:Y ratio partly into a coherent receiver block as local-oscillator signals and partly into a coherent transmitter block as a light source. The coherent receiver includes a polarization-beam-splitter-rotator to split a coherent input signal to a TE-mode signal and a TM*-mode signal respectively detected by two 90-deg hybrid receivers and a flip-mounted TIA chip assisted by two local-oscillator signals from the tunable laser device. The coherent transmitter includes a driver chip flip-mounted on the silicon photonics substrate to drive a pair of Mach-Zehnder modulators with 90-degree shift in quadrature-phase branches to modulate the laser output to two polarized signals with I / Q modulation and uses a polarization-beam-rotator-combiner to combine them as a coherent output signal.

In a WDM type PON system, each ONU comprises an optical transmitter capable to transmit optical signals with variable wavelengths, an optical signal receiving filter variable its receiving wavelength, and a control unit. An OLT selects in response to a wavelength allocation request from each ONU, a transmitting wavelength and a receiving wavelength out of currently free wavelengths and allocates these wavelengths to the requester ONT. The control unit of the ONU switches the transmitting wavelength of the optical transmitter and the receiving wavelength of the optical signal receiving filter to the wavelengths specified in a response message from the OLT and starts data communication.

The invention relates to a data transmission accelerating engine method based on multiple access passages of a transmitting end, which comprises the following steps: after a transmitting end host machine downloads a data packet from an application layer, carrying out TCP multiplexing encapsulation; then delivering the data packet to a TCP / IP protocol stack of a host machine operation system to process; transmitting an encapsulated IP datagram formed by an IP layer to a link layer and then to a physical layer; arriving at a data receiving party by an intermediate routing and demultiplexing by the receiving party. The method is characterized by comprising the following steps: arranging a data transmission accelerating engine between the IP layer and the link layer; grouping the data to be transmitted of the IP datagram according to a mark bit in an IP masthead; then detecting the flow load condition of all transmission passages of the grouped datagram groups by a load balancing module; carrying out predistribution calculation by a corresponding flow distribution algorithm and distributing a data flow to be transmitted to all available transmission passages to transmit in parallel; and finally appointing the predistributed datagram groups to different network interface devices by a data dispatching module.

The invention provides a hybrid communication method and system based on IEEE 802.15.4 and low power consumption Bluetooth dual protocol stacks. In the presence of low power consumption communicationrequirements, the IEEE 802.15.4 is used for performing communication and is switched to low power consumption Bluetooth for communication in the presence of large data volume communication requirements, a sensing device is in a 802.15.4 transmission mode by default, the IEEE 802.15.4 is periodically switched to the low power consumption Bluetooth to monitor whether Bluetooth data transmission exists. When the Bluetooth data transmission is found, the sensing device remains in a BLE transmission mode, establishes a connection with a Bluetooth device and transmits data, and immediately switchesback to the 802.15.4 transmission mode after the transmission is completed. The invention proposes a new dual protocol stack hybrid communication method, which integrates the IEEE802.15.4 and low power consumption Bluetooth dual protocol stacks on limited central processing unit and storage resources, can realize stable switching, and has the advantages of low power consumption communication and high-rate communication, the transmission rate is increased to 1 Mbps at most, the reliable transmission of large data volume in IEEE 802.15.4 devices, and the communication bandwidth, the stability and the power consumption characteristics are greatly improved.

The invention discloses a method for achieving multi-frequency coverage of a wireless sensor network based on time division multiplexing, wherein the method employs two communication methods, namely, time division multiplexing and frequency division multiplexing, so that the method makes up for disadvantages that the traditional wireless sensor network has low communication rate, small node number, low data transmission reliability and the like. The invention designs a wireless sensor network receiving node with two frequency communication, wherein one frequency is used for signaling communication and the other frequency is used for data communication; the wireless sensor node builds connection with the signaling frequency of the wireless sensor network receiving node and then distributes time slot, and performs frequency hopping to a designated data frequency to perform wireless communication of the time division multiplexing. The wireless sensor network receiving node finally sends data to a remote server. The wireless sensor network has the advantages of high reliability, short adding time, fast network rate and a large number of received nodes, so that the invention is suitable for the wireless sensor network with high requirement for data transmission reliability or transmission rate.

Systems and methods for providing accelerated transmission of broadcast data, such as financial data and news feeds, over a communication channel using data compression and decompression to provide secure transmission and transparent multiplication of communication bandwidth, as well as reduce the latency associated with data transmission of conventional systems.

The invention discloses a 1.2m feedback full-automatic portable emergency satellite communication antenna servo system which comprises a portable box, an antenna structure unit and an antenna control unit, wherein the antenna structure unit and the antenna control unit are arranged in the portable box; the antenna structure unit comprises an antenna mount, a six-section carbon fiber antenna main reflection surface and a feed source component support frame, wherein the six-section carbon fiber antenna main reflection surface and the feed source component support frame are connected to the antenna mount, an antenna auxiliary reflection surface is installed at the end part of the feed source component support frame, a feed source component support plate is installed in the middle of the feed source component support frame, a feed source component is installed on the feed source component support plate, a direction drive device and an elevation drive device are arranged in the antenna mount, and the feed source component comprises a feed horn, a polarizer, a duplexer and a polarization power transmission mechanism. The 1.2m feedback full-automatic portable emergency satellite communication antenna servo system is reasonable in design, convenient in implementation, increased in communication bandwidth, expanded in communication capacity, high in degree of intelligence and working reliability, convenient to carry and good in use effect, provides communication guarantee for the emergency handling and is convenient to popularize and apply.

An RF-ID tag has an IC, a loop antenna to which the IC is connected, and a linear booster antenna, and the booster antenna has, as one end portion in a longitudinal direction of the linear booster antenna, a fold-back portion which is wound; and a portion, having a length that measures 73% or more of a one-turn overall length of a loop of the loop antenna, of the loop antenna extends along a portion, including the fold-back portion, of the booster antenna.

A method and apparatus for transformer bandwidth enhancement is disclosed. In one embodiment, a transformer is provided for use in a high frequency communication environment. In one configuration, the transformer is configured with one or more compensation networks to improve high frequency operation and to reduce insertion loss at all frequencies. The compensation networks may be designed, in combination with a transformer, to create an equivalent all-pass symmetric lattice network having a frequency response in the desired range. In one embodiment, the compensation networks comprise a capacitance creating device which, when cross-connected to the transformer, increases transformer bandwidth.

The invention discloses an electric transmission line multi-state information monitoring system based on the 3G internet of things technology. The information monitoring system comprises a front end information collection and transmission device, a background server and a client side. The front end information collection and transmission device gets an access to the internet through a 3G wireless network and is connected with the background server through the internet. Data transmission is carried out between the background server and the front end information collection and transmission device through the internet, and the background server obtains audio and video information and running status parameter information of an electric transmission line. The client side is connected with the background server through the internet or a local area network, gives instructions to the background server according to user instructions and obtains the audio and video information and the running status parameter information of the electric transmission line. The electric transmission line multi-state information monitoring system integrates electric transmission line image monitoring, electric transmission line multiple running status parameter monitoring and other monitoring methods, and reflects the running status of an electric transmission line device more accurately and comprehensively.

An embodiment of the invention discloses a vehicle-mounted communication method. The vehicle-mounted communication method comprises the steps of acquiring a position where a vehicle is located currently, acquiring all of fixed access points (AP), wherein distances between the position where the vehicle is located currently and all of fixed AP are smaller than a maximum transmission distance; scanning all of fixed AP within a dispatching cycle and selecting at least one fixed AP with signal strength larger a preset value in the all of fixed AP as a fixed AP to be accessed according to scanning results; and triggering a mobile terminal in the vehicle to be respectively accessed to a vehicle-mounted AP and the fixed AP to be accessed within the dispatching cycle an according to allocated time when an accessing condition is met. Accordingly, the embodiment of the invention further discloses a vehicle-mounted communication device and a vehicle-mounted communication system. By means of the technical scheme, when the accessing condition is met, the mobile terminal in the vehicle can be connected to the fixed AP nearby the current position, accordingly communication bandwidth is increased, and business with large data volume is supported.

The invention relates to a logistics distribution cloud management system comprising a client terminal module which is for generating client order information and sending the client order information to a cloud server, and distribution information is received; an order processing module which is for calling the cloud server to process and store the client order information and send the client order information to an order distribution module; and the order distribution module which is for calling the cloud server to send the distributed order information to a distribution terminal, the distribution terminal finishing the distribution and sending the distribution information to a client terminal module. The cloud server is utilized to process the client distributed order information and intelligently distribute the distribution information to the most efficient distribution terminal to carry out distribution service, thereby improving order processing efficiency, reducing distribution time, and reducing distribution operation cost.

A telecommunications system provides mobile internet protocol related communications services to mobile nodes via a plurality of access networks that each include an access gateway, a mobility manager operable to receive link quality messages from the mobile nodes providing an indication of a currently available link quality from an access network with which the mobile node is currently affiliated. The mobility manager is also operable to receive application server messages from the application server for managing the communications service with respect to the communications session level. The mobility manager directs a change of affiliation of a first mobile node between one of a first of the access networks and a second of the access networks to the other of the first and second access networks, or a change of communications session level of the first mobile node.

A temperature insensitive DEMUX / MUX device whose wavelength does not change by environment temperature is provided for WDM application. The temperature insensitive DEMUX / MUX device includes a waveguide-based delay-line-interferometer configured to receive an input light bearing multiplexed wavelengths and output a first output light bearing the same multiplexed wavelengths but with a shifted intensity peak position. The first output light is transmitted into a DEMUX device through a first free space coupler and a grating fiber or waveguide to be demultiplexed for forming a plurality of second output lights each bearing an individual wavelength. The DEMUX device includes a second free space coupler for refocusing each second output light to corresponding output channel. The shifted intensity peak position of the first output light is tunable to make each second output light free from any temperature-induced drift off corresponding output channel.

In a client-cache-server system, the weight value of a first object which is maintained in the cache and linked to a second object maintained in the server is determined. Based on the weight value, a decision is made as to whether prefetching is necessary. If the decision indicates that prefetching is necessary, the second object is prefetched from the server to refresh the cache. A further decision is made as to whether update enquiry is necessary based on the weight value. If the further decision indicates that update enquiry is necessary, a message is sent to the server for inquiring whether the first object has been updated in the server. If the server responds with a reply that indicates that the first object has been updated, the second object is prefetched from the server to refresh the cache.

The embodiment of the invention discloses a protocol conversion method and device. The protocol conversion method and device are used for converting a communication protocol between a diagnostic instrument and a vehicle electronic control unit (ECU) to increase the bandwidth of vehicle diagnostic communication and meanwhile lower the communication cost. The protocol conversion method comprises thesteps: communication connection with a vehicle gateway and the diagnostic instrument is built; a first protocol diagnostic command sent by the diagnostic instrument is received; the first protocol diagnostic command is analyzed, and the first protocol diagnostic command is converted into a second protocol diagnostic command; the second protocol diagnostic command is sent to the vehicle gateway, and thus the vehicle gateway sends the second protocol diagnostic command to the vehicle ECU and receives second protocol diagnostic data returned by the ECU; and the second protocol diagnostic data are converted into first protocol diagnostic data to be sent to the diagnostic instrument.

The method of realizing router chip of group exchange network with FPGA device includes the following steps: setting inside chip symmetrical I / O ports via utilizing the gate array resource in FPGA; setting inside chip symmetrical crossed logic switches; dispatching the data passages from the input ports to the output ports with arbitration logic; and completing the data exchange task among multiple ports. The kernel of the present invention is universal crossed switches, and the group communication system with the digital exchange chip is easy to constitute and easy to expand. The present invention may be used in various network topology. In addition, the present invention can simplify effectively the communication protocol and this makes it possible for the corresponding exchange equipment to realize safe and efficient communication among group nodes. The present invention makes best use of the resource superiority of FPGA and speed superiority of serial-parallel conversion interface device.

The present invention relates to a system for providing neuronal stimulation signals configured to elicit sensory percepts in the cortex of an individual, comprising means for obtaining spatial information relating to the actual or planned position of at least one neuronal stimulation means relative to at least one afferent axon targeting at least one sensory neuron in the cortex of the individual and means for determining at least one neuronal stimulation signal to be applied to at least one afferent axon via the at least one neuronal stimulation means based at least in part on the obtained spatial information.The present invention further relates to a system for communicating conceptual information to an individual, comprising means for selecting at least one neuronal stimulation signal to be applied to at least one afferent axon targeting at least one sensory neuron in the cortex of the individual, wherein the at least one neuronal stimulation signal corresponds to the conceptual information to be communicated and means for transmitting the at least one neuronal stimulation signa to at least one neuronal stimulation means of the individual.

The invention relates to a device for achieving electric power system data self-adapting compression and a method thereof, wherein, the device comprises an equiphase sampling unit and a compression unit, analog signals is connected with the input end of the equiphase sampling unit, and the output end of the equiphase sampling unit is connected the compression unit; and the method comprises the following steps: 1. a compressor input sequence is obtained by conducting synchronous equiphase sampling on the input signals; 2. and then the compressor input sequence is subjeced to equiphase point sequence compression. The Signal-to-Noise by adopting the equiphase sampling method of the invention is obviously higher than that adopting uniformly-spaced sampling, and with the increasing of the compression ratio, the Signal-to-Noise adopting uniformly-spaced sampling is minished quickly, but the Signal-to-Noise adopting the equiphase sampling method of the invention is minished relatively slowly, thereby the equiphase sampling data can realize big compression ratio and effectively and stably improve the communication bandwidth of the electric power communications system.

The invention provides a cascaded power line carrier wave method and device. The method comprises sending the priority of each communication slave and the correspondence between each communication slave and ID number and control order to each communication slave through the broadcast mechanism which communication host adopts; each communication slave uploads data to communication host in turn according to control order, correspondence and priority. The method avoids the point to point communication which needs to be done to each communication slave during the polling of communication host, the communication host just needs to broadcast for one time to all communication slaves and each communicate slave can upload data in turn according to priority. The method reduces the time for inquiry in turn effectively and improves the communication bandwidth. At the same time, the method inherits the advantage that the data frame of master-slave mechanism is simple. The proportion of effective data of each frame is high and the utilization of communication bandwidth can be improved greatly.

Several detailed layout designs are disclosed, for the monolithic integration of avalanche devices in large arrays, that can be operated as Avalanche Photo-Diodes (APDs) or Avalanche Light Emitting Diodes (ALEDs) depending only on the applied bias conditions, which can be software-controlled from peripheral circuitry. If the deposited films have direct bandgaps, then the devices can emit light even in the absence of avalanche operation. In particular, the layouts according to the invention comprise a sensor / emitter matrix achieved through the replication of basic Pixel / Lixel cells.

The invention is a method for user class parallel communication among computers, which uses several high performance network which support the intelligent network card to carry on the mutual connection among commuters, adds in the device supporting the parallel communication in the system core space device driving procedure of the user class communication protocol and the user space communication bank, the data is divided and connected among the connected networks in the transmitting process. the method can realize the parallel, non-copy, sequence maintaining information transmitting among computers, thus the user can acquire the aggregation performance provided by the several connected network hardware. The method makes the parallel communication process transparent to the upper user and the bottom communication network, avoids from adding the user burden and the modification and dependents to the special network. The method is applicable to the system which uses single network can't satisfy the communication performance demands among computers.

The invention discloses an onboard seamless data transmission wireless communication system and method. The onboard seamless data transmission wireless communication system comprises an onboard system and a ground system. The onboard system comprises a data merging router, a built-in subnet and an onboard communication system, wherein the built-in subnet is in signal connection with the data merging router. The ground system comprises a data center, a ground communication system and a ground supporting system, wherein the ground communication system is in signal connection with the data center, and the ground communication system is in signal connection with the onboard communication system. The data merging router is used for merging a plurality of single communication links into a unified external communication transmission channel and building the external communication transmission channel communicated with the data center. The data merging router is provided with a communication control interface module. The communication control interface module is used for controlling the onboard communication system to externally initiate a single communication link connecting request to build a communication transmission channel. The onboard seamless data transmission wireless communication system is convenient and flexible to use, smooth in data transmission, short in data switching delay and high in transmission reliability.