397results about How to "Improve transmission bandwidth" patented technology

A method of operating a mobile electronic device includes detecting at least one other mobile electronic device within a predetermined distance of the mobile electronic device, and determining a spatial relationship of the at least one other mobile electronic device relative to the mobile electronic device. An ad hoc wireless connection is established with the at least one other mobile electronic device based on the determined spatial relationship. Data may be transmitted to and / or received from the at least one other mobile electronic device over the ad hoc wireless connection based on the determined spatial relationship. Related systems, devices, and computer program products are also discussed.

The invention discloses a multi-DSP and multi-FPGA parallel processing system which comprises FPGAs, DSPs, ADs, a DA, DDR3s and power supply chips. An implement method of the multi-DSP and multi-FPGA parallel processing system includes the following five steps: (1) achieving PCIe interconnection between the FPGAs, (2) achieving PCIe interconnection between the FPGAs and the DSPs, (3) achieving SRIO interconnection between the FPGAs, (4) achieving SRIO interconnection between the FPGAs and the DSPs, and (5) achieving Hyperlink interconnection between the DSPs. The multi-DSP and multi-FPGA parallel processing system is high in parallel processing capacity, abundant in function and high in flexibility and extensibility, data transmission bottlenecks between processor chips are broken, and the multi-DSP and multi-FPGA parallel processing system is high in transportability and have the good practical value in the digital signal processing field.

In real-time communication between a communication terminal device of a first packet-oriented communication network and a second packet-oriented communication network, data packets which are to be transmitted are transmitted from the communication terminal device in essentially uncompressed form via the first communication network to a data compression device, in order to be compressed before being forwarded into the second communication network.

A mother-board includes a chipset, a switch, and first and second PCI Express X16 graphics interfaces. The switch has first and second switch circuits. The switch selectively turns on one of the first and second switch circuits according to a control signal. The first PCI Express X16 graphics interface has former eight lanes electrically connected to the chipset, and latter eight lanes selectively electrically connected to the chipset through the first switch circuit. The second PCI Express X16 graphics interface has former eight lanes selectively electrically connected to the chipset through the second switch circuit. When the first switch circuit is turned on, 16 lanes of the first PCI Express X16 graphics interface are electrically connected to the chipset. When the second switch circuit is turned on, the former eight lanes of the second PCI Express X16 graphics interface are electrically connected to the chipset.

A drilling system utilizing a plurality of independent telemetry systems. The drilling system uses a drill collar as a pressure housing for downhole components of the system. One or more sensors are disposed within the pressure housing. These sensors can be MWD sensors, LWD sensors, or both MWD and LWD sensors. A plurality of independent borehole telemetry systems is used to telemeter sensor response data to the surface of the earth. Each sensor cooperates with a downhole component of at least one of the independent telemetry systems. The plurality of telemetry systems can be of the same type, such as a mud pulse systems. Alternately, the telemetry systems can be of different types including a mud pulse system and an electromagnetic system.

The invention relates to a multi-frequency carrier aggregation WIFI data transmission method and device and a terminal device. The multi-frequency carrier aggregation WIFI data transmission method comprises the following steps: when the WIFI networks covering the terminal contain a plurality of signal frequency bands, controlling the WIFI channel operating in the frequency bands in the terminal enter into the enabled state at the same time; establishing a communication link with each one of the signal frequency bands mentioned above; using the established communication links to transmit the data together. Thus, the transmission bandwidth is widened, and the data transmission rate is improved without increasing the antenna; meanwhile, according to the embodiment of the invention, the weight ratio of the first information flow of each communication link is calculated according to the signal transmission rate of each communication link; and the WIFI data to be transmitted is allocated to each communication link according to the first information flow weight ratio of each communication link; therefore, the information flow weight of each signal frequency band can be flexibly configured, the information capacity is maximized while ensuring the communication quality, and the spectrum resources can be better used.

The invention provides an intelligent vehicle-mounted communication informatization system based on a 3-generation (3G) technology and a cloud system. The intelligent vehicle-mounted communication informatization system comprises a master control module, a wireless communication module, a positioning module, a sensor module and other functional modules, wherein the master control module comprises an advanced Risc machine (ARM)-based micro controller which is used for coordinatively controlling other modules of the system, and an intelligent embedded operating system; the wireless communication module is a wireless access module for accessing the system to the Internet based on various 3G technologies and is electrically connected with the master control module; the positioning module is a module for supplying a positioning function to the system based on positioning systems, such as a global positioning system (GPS), a beidou positioning system and the like, and is electrically connected with the master control module; the sensor module is a module for supplying a theftproof function based on an ultrasonic sensing technology and is electrically connected with the master control module; and other functional modules are modules for realizing main functions of the system. The invention also provides a communication method applied to the system. The system has the characteristics that: the GPS navigation speed is higher, the cloud system can be widely applied, and the whole vehicle-mounted system is higher in intelligentization level.

The application provides a communication method, network nodes, and a radio access network system. The method is applied to a radio access network system comprising a first network node and a second network node, wherein the first network node and the second network node communicate with each other through a first communication interface. The method includes the following steps that: the first network node receives first configuration information from the second network node, wherein the first configuration information contains a serving cell set configured for a terminal device, the first configuration information indicates the statuses of auxiliary cells, and the first configuration information is generated by the second network node in a first protocol layer; the first network node sends the first configuration information to the terminal device; the first network node sends first indication information to the terminal device, wherein the first indication information contains the information of the statuses of at least one auxiliary cell which belongs to the serving cell set, and the first indication information is generated by the first network node in a second protocol layer.

The invention discloses an indoor track type intelligent patrolling robot system based on a combined track. The system comprises the combined track and a robot body. The robot body comprises a drive system, a detecting assembly, a holder, a synchronous belt system, a movable platform and a control system, wherein the control system is arranged on the movable platform, the holder is fixed to the upper end of the movable platform, the detecting assembly is fixed to the holder, the synchronous belt system is fixedly connected with the combined track, the driving system is fixed to the movable platform, the movable platform is placed on the combined track, and the drive system provides power to enable a robot to move along the combined track. The wall-mounted combined track is adopted, the robot can move in two or more vertical planes, the combined mode meets the diverse and complex detecting requirements of indoor equipment detection, and according to the actual detecting requirement, a horizontal track or a vertical track can be independently taken out to independently form a system detection robot system.

The invention relates to the mobile communication field, disclosing a space frequency coding based multi-antenna transmission diversity method and the system thereof. When the number of transmission antenna is over 2, a coding can be accomplished within an OFDM symbol period and meanwhile a diversity gain similar to STTD+CSD can be obtained. The invention uses space frequency coding to obtain the diversity gain and at the same time introduces phase offset in the frequency-domain to obtain extra frequency diversity similar to CSD through the channel of the frequency-domain data. The phase offset satisfies: the frequency-domain data loaded in the sub-carrier wave set used in SFTD on the same antenna possesses the same phase offset and the frequency-domain data loaded between the sub-carrier wave sets possesses different phase offsets. Moreover, the frequency-domain data loaded on the same sub-carrier wave on different antenna in the same antenna stack possesses different phase offsets.

The invention provides an inspection system and an inspection method of a valve hall robot based on a video monitoring linkage system. The inspection system comprises a linkage analysis control host, a communication server and an auxiliary fixed point monitoring subsystem; an inspection robot comprises a robot terminal system; the robot terminal system comprised a track; a moving mechanism, a motion driving mechanism and a detection mechanism are arranged on the track; the inspection system and the inspection method have the advantage that real-time unmanned detection requirement of valve hall equipment is met; by coordinating inspection of the robot with a fixed point camera, the problems that the monitoring range is limited and the geographic position of substation equipment is not convenient for arrangement of monitoring points are solved; the problems that the abnormality cannot be autonomously identified as well as intelligent linkage security and protection, firefighting and online equipment management system are solved; fires are monitored by using a mixing mode of a visible light video and a thermal infrared imager, so the fires can be reduced; according to the inspection system and the inspection method provided by the invention, by adopting double detection of the visible light video and an infrared thermal video, the false alarm rate of fire alarms is reduced, and the processing efficiency of the fire alarms is improved.

A wireless transceiver capable of selectively receiving and transmitting as a direct sequence spread spectrum system or as a frequency hopping spread spectrum system is disclosed. The system is particularly suitable for use in a cordless telephone system. The transceiver includes components for both direct sequence spread spectrum transmission and reception and for frequency hopping spread spectrum transmission and reception.

The invention discloses a multi-interface fusion method of a communication node, which comprises the following steps: establishing an address table and an interface table; regularly testing the state and the parameter information of each network interface by a state / parameter maintenance module; wiring the state and parameter information of each network interface into the interface table and updating the interface table; automatically distributing business data to be sent out by the communication node by a business leading module according to the interface state information of the interface table; and sending out the business data through the set network interface so that the defects of inconvenient interface management and maintenance of the manual closing of a network interface by users or manual route table configuration in the prior art. At the same time, when a plurality of network interfaces capable of visiting the outer network or the inner network exist, the optimal network interface is further selected for outwards sending according to the performance parameter of the outer network connection of the interface table, or the business data carry out load balance on the network interfaces, so the business data can be distributed to the optimal network interface, or the business data can be transmitted and distributed to a plurality of network interfaces, and the integral transmission bandwidth of the outer network or the inner network of the system is indirectly improved.

The invention discloses a covert communication method based on data package multilayer packaging. According to the covert communication method based on data package multilayer packaging, the redundancy of a TCP / IP family is analyzed, covert information is decentralized and hidden in an HTTP of an application layer, a TCP of a transmission layer and an IP of a network layer, and therefore the reliability and the transmission bandwidth of a covert channel are greatly improved.

An integrated lead head suspension flexure including a spring metal base layer, an insulating layer on the base layer and traces on the insulating layer. The traces include first and second adjacent and co-planar write traces and first and second shield traces. The shielding traces are on opposite sides of the write traces, electrically interconnected and generally co-planar with the write traces. Portions of the stainless steel layer below the traces include windows. The shield traces can be connected to ground and / or to the spring metal base layer.

The invention discloses a distributed message queue management system based on NVM, which adopts a theme-based publish-subscribe mode, and is provided with producer machines, consumer machines, a message server cluster and a cluster manager, each machine is configured with an NVM memory and an RDMA network card, and the NVM memories and the RDMA network cards are interconnected through an RDMA network; the device has the effects that a complex I / O software stack can be bypassed; message data is accessed through the virtual address of the process; the access to the message data can be completedby accessing the message metadata supporting random reading; meanwhile, messages are transmitted based on RDMA unilateral operation; the message data in the memory of the remote server is directly read and written; no redundant data copy is needed, the message transmission with high data throughput and low delay is realized, the remote message writing is ensured to be non-locked through a theme partitioning mechanism, and in the remote message writing process, a message batch processing strategy based on message production speed and message transmission speed self-adaption is adopted, so thatthe transmission delay is reduced, and the transmission bandwidth is improved.

The invention relates to a terminal WIFI data transmission-rate improving method and device and terminal equipment. When a WIFI network which covers terminals includes multiple signal frequency bands, WIFI paths working on the frequency bands in corresponding control terminals access an enabling state, and a physical address is allotted to each WIFI path in the enabling state, and in this way, each WIFI path can use the physical address thereof to conduct information interaction with a wireless router, the WIFI path and the wireless router transmit data streams together, the transmission bandwidth is broadened, and the data transmission rate is improved on the basis of not increasing the quantity of antennas; meanwhile, data contents the terminals transmit to the wireless router further include identity identification information and data transmission pattern information, the wireless router can bind the physical addresses used by the WIFI paths which have the same identity identification information according to the data transmission pattern information, and therefore the wireless router recognizes the terminals corresponding to various physical addresses.

The invention discloses a heterogeneous network data parallel transmission system. The system comprises a multi-mode terminal, an aggregation server and a transmission control unit; the multi-mode terminal comprises an LTE wireless network card and a WiFi access wireless network card; the aggregation server provides LTE mobile cellular access and wifi access for the multi-mode terminal at the same time; the transmission control unit is used for periodically detecting each physical link bandwidth, shunting according to a detected bandwidth proportion and moreover sorting received service data packets by using a receiving window. Correspondingly, the invention also provides a downlink transmission method and uplink transmission method based on the system. According to the system and the methods, the problem that a relatively high transmission rate cannot be realized by a single access technique because of limitations of factors such as bandwidths is solved; the advantages of two access techniques are utilized fully; parallel transmission between the two access techniques is realized; and therefore, the total transmission rate of the data is greatly increased, and the pursuit of a user for high rate transmission is satisfied.

The invention provides a data transmission method and a device. The method comprises that a first wireless access device determines user equipment (UE) in the need of distribution and transmits distribution configuration information to the UE so as to enable the UE to obtain information of a radio bearer (RB) capable of distributing after the UE receives the distribution configuration information; the first wireless access device receives distribution configuration finished information transmitted by the UE and the distribution configuration finished information comprises information of a second wireless access device relevant to the UE; a user plane channel is built between the first wireless access device and the second wireless access device, and first data are transmitted through an air interface of a first wireless access technology between the first wireless access device and the UE; and second data are transmitted through the user plane channel and an air interface of a second wireless access technology between the second wireless access device and the UE. The data transmission method and the device can improve air interface bandwidths.

The invention discloses an intelligent inspection robot system of a converter station valve hall based on a combined track, and the system comprises a remote monitoring center which is in wire communication with at least one robot terminal system, the robot terminal system comprises a detecting system, a track driving and positioning system and a communication control system, the detecting system is controlled by the track driving and positioning system through the communication control system, the robot terminal system is further provided with a shielding device and powered and communicated through combination of towropes and sliding contact line power carriers, and the monitoring center is communicated with the communication control system through a status self-checking module to monitor the operation condition of the robot terminal system in real time. The intelligent inspection robot system has the advantages of compact and beautiful structure, quick and easy installation, steady and reliable operation, high positioning accuracy and automaticity, wide detection range.

The invention relates to a train broadband communication network architecture suitable for a railway vehicle. Specifically, the network architecture is a broadband communication network architecture provided according to train control and an information service network. The train broadband communication network architecture mainly comprises two-level bus architectures which are a train-level network bus and a vehicle-level network bus. According to a train-level network, a broadband network bus is adopted, penetrates through carriages of a whole train, is in linear connection with train-level network elements, and is used for achieving communication between the train-level network elements. According to a vehicle-level network, a broadband network bus is adopted and used for achieving communication between the train-level network elements and vehicle-level network elements, communication between the vehicle-level network elements, and communication between the vehicle-level network elements in the vehicle and vehicle-level equipment provided with broadband network bus interfaces. The train broadband communication network architecture further comprises an equipment-level network bus. According to the equipment-level network bus, other network buses except for the broadband network buses are adopted. Protocol conversion is achieved through gateways connected with the vehicle-level network elements, and communication with the vehicle-level network is achieved.

The invention relates to a gradual refractive index bending resistant multimode optical fiber, which includes a sandwich layer and a cladding, and is characterized in that the radius of the sandwich layer is 20 to 50 microns; the refractive index of the sandwich layer is distributed in a gradient gradation type, the distribution power exponent Alpha is 1.89 to 1.97, and the maximum relative refringence delta 1% max of the sandwich layer is 0.9% to 2.72%; the inner cladding is arranged adjacent to the sandwich layer, the radius of the inner cladding is 22 to 57 microns, and the relative refringence delta 2% is minus 0.02% to 0.02%; and a middle cladding and an outer cladding are arranged outwards the inner cladding sequentially, the middle cladding is a pure quartz glass layer, the radius of the middle cladding is 32 to 60 microns, the relative refringence delta 3% is minus 0.01% to 0.01%. The gradual refractive index bending resistant multimode optical fiber provided by the invention not only reduces the bending dissipation of the optical fiber, but also guarantees that optical fiber has high transmission bandwidth at a 1300 nm window, effectively improves the light collection and concentration capabilities of the optical fiber to LEDs, VCSELs or LDs through increasing the core diameter and numerical aperture, and improves the coupling fault-tolerant capability of luminous devices, namely between the light source and the light transmitting device, i.e. between optical fibers.

The invention discloses a service quality adjustment method and a device for real-time services. The method includes the following steps: monitoring the quality of transferred media stream; driving at least one device in the transmission direction to reduce the transmission bandwidth of media stream if the media stream quality is lower than the reset QoS requirements; and / or driving at least one device in the transmission direction to increase the transmission bandwidth of media stream if the media stream quality is higher than the reset QoS requirements. The method guarantees the dynamic adjustment of the QoS and divides the clients into different levels; if the quality of the highest-level client cannot be guaranteed, the lowest-level client will be closed, thus ensuring that the clients of different levels can get corresponding service quality.

The invention relates to a distributed antenna system, method and device. The distributed antenna system comprises a digital-to-analog expansion unit and a far-end cascade chain. The far-end cascade chain comprises a plurality of far-end units which are in cascade connection through radio frequency cables, and the head-stage far-end unit of the far-end cascade chain is connected with the digital-to-analog expansion unit through the radio frequency cables. And the digital-to-analog expansion unit is used for carrying out baseband processing operation on the received external signal and carrying out mutual conversion operation on the analog radio frequency signal and the digital radio frequency signal. Based on this, the digital-to-analog expansion unit and the remote unit adopt a daisy chain topological structure based on cable connection, so that the cost of a transmission link can be effectively reduced while the transmission bandwidth is improved. Moreover, the digital-to-analog expansion unit executes baseband processing, and the far-end unit does not need baseband processing equipment, so that the device cost and the operation power consumption of the system can be effectively reduced. The system has the characteristics of supporting multi-mode and multi-frequency, cell splitting and the like, and is easy to expand the capacity and low in construction difficulty.

The invention relates to the technical field of wireless network high-definition video surveillance and discloses a video surveillance method and apparatus based on 3G network. The apparatus comprises terminal equipment and server-side equipment; the server-side equipment is accessed to Internet through IP network and receives video data stream sent by surveillance video transmission terminal equipment through the 3G network; the terminal equipment comprises a wireless communication module and a video processing module; the wireless communication module is connected with the video processing module through an interface; and the video processing module is connected with a video camera through any one of an IEEE 1394 interface, an SDI (Standard Data Interface) and an HDMI (High-Definition Multimedia Interface) to realize video data collection. According to the invention, mobile high-definition images of video surveillance are transmitted real-timely through binding parallel balance transmission of a plurality of wireless channels under different systems, so that the transmission bandwidth of data is expanded effectively, the data transmission rate of each channel can be adjusted dynamically and real-timely, and the problem of real-time surveillance in a mobile state can be solved.