2771 results about "Transmission technology" patented technology

A new display system and method is described, utilizing a cellular telephone having digital camera capability and a television linked directly over a UWB wireless signal forming a UWB wireless video pico-net. The system utilizes a digital camera unit to capture picture or video images for UWB transmission directly to the television acting as a pico-net host controller, either independently or together with the cellular telephone operating as a pico-net child. The display system comprises and one or more remote devices and a host display communicating on a UWB wireless network. The host display comprises a display for presentation of the picture or video images and a UWB transceiver for processing image data from the picture or video images, for selectively sending and receiving the image data based on a request from the child. The one or more remote devices comprise a digital camera for capturing the picture or video images and another UWB transceiver as used in the host display. The host display has a generally larger display for improved presentation of the captured picture or video images useful and amusing for group, party, wedding, and conference viewing, or simply for enhanced personal enjoyment. For picture or video image sharing, the system further facilitates downloading the current picture or video images from the host display television to a requesting cellular telephone or digital camera equipped with the UWB transceiver. The UWB display system provides sufficient bandwidth to support numerous such download requests simultaneously, while utilizing a transmission technology having minimal power consumption.

The invention discloses a communication method and a communication system from a device to a device and user devices. The method includes that a first user device detects a second reference signal sent by a second user device; the first user device sends a synchronization parameter according to a detected result; and according to the synchronization parameter, the second user device confirms a data transmission timing when the second user device carries out device-to-device (D2D) communication with the first user device. The method solves the technical problem that during the communication process in the prior art, a tradition cellular communication mode cannot be continuously used for achieving that service data are directly transmitted between user experience (UE), the purpose that under the situation that synchronization is successful, the D2D data sending timing is confirmed between the user devices is achieved, and therefore the technical effect of achieving the D2D communication in a cellular is achieved under the situation that complexity of the user devices is not remarkably increased.

An invention is disclosed for a computerized system for relaying meeting activity in electronic calendar applications, which allows a meeting participant to automatically obtain desired information about activity taking place in a scheduled meeting or presentation to allow that participant to determine whether he or she should attend. The invention also integrates electronic meeting software scheduling and coordination functions to provide a dynamic “schedule enforcement agent” for conducting meetings involving use of electronic data transmission technology (“emeetings”).

A method is provided for communications in a cellular network (1) comprising a plurality of mobile stations (MS1 to MS3) adapted for performing wireless communications with at least one base station (BS1, BS2) using a first transmission technology, the method comprising: forming a cooperating cluster (C) comprising two or more of the mobile stations (MS1, MS2), and performing short-range communications between the mobile stations (MS1, MS2) of the cooperating cluster (C) using a second transmission technology being different from the first transmission technology for improving, for at least one mobile station (MS1, MS2) of the cluster (C), the performance of the wireless communications with the base station (BS), preferably by using MIMO techniques for at least one of interference suppression and cancellation, in particular by using at least one of transmit precoding for uplink transmissions and receive antenna weighting for downlink reception. A mobile station (MS1, MS2) for forming a cooperating cluster (C), a cooperating cluster (C) comprising at least one such mobile station (MS1, MS2), and a cellular network (1) are also provided.

An advanced channel storage and retrieving system is achieved that is capable of simultaneously transporting multiple-stream data concurrently, with encryptions and error detection and limited correction capability using wavefront (WF) multiplexing (muxing) at the pre-processing and WF demultiplexing (de-muxing) in the post-processing. The WF muxing and demuxing processing can be applied for multiple signal streams with similar contents and format such as cable TV delivery systems or multiple signal streams with very distinct contents and format such as Karaoke multimedia systems. The stored or transported data are preprocessed by a WF muxing processor and are in the formats of multiple sub-channels. Signals in each sub-channel are results of unique linear combination of all the input signals streams. Conversely, an input signal stream is replicated and appears on all the sub-channels. Furthermore the replicated streams in various sub-channels are “linked” together by a unique phase weighting vector, which is called “wavefront” or WF. Various input signal streams will feature different WFs among their replicated signal streams in the sub-channels. The WF muxing processing is capable to generating a set of orthogonal WFs, and the WF demuxing processing is capable of reconstituting the input signal streams based on the retrieved sub-channel data only if the orthogonal characteristics of a set of WFs are preserved. Without the orthogonality among the WF, the signals in sub-channels are mixed and become effectively pseudo random noise. Therefore, an electronic locking mechanism in the preprocessing is implemented to make the WFs un-orthogonal among one another. Similarly, an electronic un-locking mechanism in the post-processing is implemented to restore the orthogonal characteristics among various WFs embedded in the sub-channel signals. Some of the phenomena due to the selected locking mechanisms are reproducible in nature, such as wave propagating effects, and other are distinctively man-made; such as switching sub-channel sequences. There are other conventional encryption techniques using public and private keys which can be applied in conjunction with the WF muxing and de-muxing processor, converting plain data streams into ciphered data streams which can be decoded back into the original plain data streams. An encryption algorithm along with a key is used in the encryption and decryption of data. As to the optional parallel to serial and serial to parallel conversions in the pre and post processing, respectively, we assume that transmissions with single carrier are more efficient than those with multiple carriers. We also assume single channel recording is more cost effective than multiple channel recording. However, there are occasions that continuous spectrum is hard to come-by. We may use fragmented spectrum for transmissions. There are techniques to convert wideband waveforms using continuous spectra into multiple fragmented sub-channels distributed on non-continuous frequency slots. Under these conditions we may replace the parallel to serial conversion processing by a frequency mapping processor.

The invention discloses an intelligent traffic system, which reduces traffic jam, environmental pollution, accident rate and the load of drivers and achieves the aims of ensuring security, improving efficiency and environment and saving energy resources. The technical scheme is that the invention adopts the intelligent traffic system which is formed by a road system composed of a lead-in lane and a totally-closed lane, a GPS positioning system, a 3G or 4G communication system, a control system and automatic travel vehicles. After using the intelligent traffic system, the driver can give up autonomic driving and uses automatic driving controlled by the system to reach the destination. The intelligent traffic system uses advanced information technology, data communication transmission technology, global positioning technology, geographic information system technology, electric control technology and computer processing technology, is a novel transportation system integrating informatization, intelligent and socialization and makes traffic infrastructure exert the largest efficacy.

The invention provides a smart home voice control system based on Bluetooth transmission, which is used for realizing voice control between a mobile phone terminal and a smart home electrical appliance. Because a mobile terminal adopts a Bluetooth transmission technology, the mobile terminal is more suitable for a local area network (LAN) in the smart home, thus greatly prolonging the distance of the voice control; and noises in the voice transmitted by the Bluetooth can be extremely eliminated from a pronunciation end, thus a transmitted voice command is more easy to identify and analyze. The system comprises a smart mobile phone terminal and a central control device, wherein the smart mobile terminal comprises a Bluetooth device and a voice input device, and is used for voice collection and Bluetooth transmission of a front end; and the central control device comprises a Bluetooth device, and is used for receiving voice data sent by the smart mobile terminal via the Bluetooth, analyzing the voice data, and sending target control signals to a controller end. A user can control the home electrical appliance by inputting a voice command in the smart mobile terminal, thus realizing a function that the mobile terminal is used to control the home electrical appliance in a short distance, and reaching the purpose of home intelligentization.

The invention discloses a method and a system for sending an SRS (survey reference signal); the method comprises the following steps: user equipment (UE) transmits the SRS to a base station on a time domain resource, a frequency domain resource and / or a code domain resource, wherein the time domain resource comprises the last time domain sign, the first time domain sign or the last but one time domain sign of a sub-frame of an SRS cycle; the frequency domain resource comprises a frequency domain location of the SRS or a sending frequency comb of the SRS, the code domain resource is obtained by the following method: a sequence group number of the SRS is generated by the UE according to a parameter which is configured for the UE by the base station through a high level signaling and is proprietary by users, and the code domain resource which is needed for sending the SRS is determined according to the generated sequence group number of the SRS. The available resource of the SRS is increased, the user multiplexing capacity of the SRS is improved, and the channel estimation quality of the base station to the SRS is improved, therefore, the application of the coordinated multi-point transmission technology to the system is supported effectively.

A wireless communications systems employing code-division multiple access information transmission techniques includes a transmission facility having ground-based transmission and reception electronic equipment, a remotely located RF power amplifier, an antenna, and an RF cable connecting the ground-based equipment with the remotely located RF power amplifier. Power level detectors in the ground-based equipment and in the remotely located RF power amplifier measure the signal level at each end of the RF cable. A microcontroller compares these measurements and adjusts a variable attenuator in the transmission signal path and a variable attenuator in the received signal path to compensate for signal level variability due to variations in signal loss.

Architecture for efficient processing of the evolving OTN transmission technology, standardized under ITU-T G.709, in conjunction with existing and emerging SONET / SDH protocol signals, standardized under ANSI T1.105 / ITU-T G.707. The new architecture allows processing the SONET / SDH signals, and / or OTN signals, and / or SONET / SDH mapped into OTN signals more efficiently. The architecture further allows processing and multiplexing of lower order signals into a higher order signal such as quad OC-192 into OC-768 or quad OC-192 into OPU3 and OTU3. This architecture uses an embedded processor to process some of the signals' overhead in software, contributing to an additional level of flexibility in the processing. This architecture enables customization and allowing for future standard updates and upgrades. The architecture can be upgraded to SONET OC-3072, SDH STM-1024 and OTU4, which currently are not standardized. The architecture can also be used for the implementation of SONET OC-192 with OTN OTU2.

Method and system for reducing switching delays between digital video feeds using multicast slotted transmission technique. Method, system, computer program stored on a computer readable medium for reducing switching delays between digital video feeds or different video or data channels using a slotted distribution and transmission technique. Method and system for performing a fast channel change operation. A computer propagated data signal. An article of manufacture comprising a digital video signal set.

The invention relates to a somatosensory interactive broadcasting guide system and method based on free viewpoints. The system comprises a server side, a video transmission network and a client side, wherein, the server side comprises a multi-camera system, a video processing server and a streaming media server which are used for completing multi-channel video capture, panoramic video synthesis, H.264 encoding and RTSP (real time streaming protocol) streaming media service; the video transmission network is a local area network (LAN) or wide area network (WAN) based on a TCP / IP (transmission control protocol / Internet protocol); and the client side comprises a free viewpoint playing terminal and a somatosensory sensor, wherein, the free viewpoint playing terminal comprises functional modules which are used for completing video streaming media receiving and decoding, gesture recognition based on a somatosensory controller, free viewpoint generation and other tasks. The somatosensory interactive broadcasting guide system and method have the beneficial effects that by combining multi-channel video into panoramic video, software and hardware investment and technical cost can be saved by directly utilizing the currently mature video coding and streaming media transmission technology, and meanwhile panoramic seamless roaming at 360 degrees and free viewpoint switchover can be really realized.

The invention discloses a position-information-based device-to-device (D2D) clustering multicast method in a cellular network. The method comprises the following operation steps that: terminals upload own geographical position, transmission distance and residual energy information to a base station; the base station clusters the terminal by using a geographical-position-based clustering method according to the obtained information of all the terminals in a D2D area, and transmits clustering information to all the terminals; and after all the terminals receive the clustering information, two-hop transmission is realized by adopting a multicast transmission mode to ensure that all the terminals in the area can reliably receive data from a source terminal. According to the method, network layer topology and a multicast transmission technology are combined, so that the method is low in computational complexity, easy to implement and quite favorable for the realization of D2D communication in the cellular network, a D2D communication effect in a scenario with a plurality of terminals is greatly improved, the transmission energy consumption of the terminal is reduced to a certain extent, an energy utilization rate is increased, and terminal running time in the D2D communication is prolonged. The method has broad popularization and application prospect.

It is a multimedia information transmission time frequency matrix two-dimensional sub-channel dynamic alignment method, which belongs to digit information transmission technique field and comprises the following steps: to generate two-dimensional time zone and frequency zone matrix TFM channel alignment pattern according to certain rules; to align the multimedia program code flow input to the relative TDS-OFDM signal frame and OFDM sub-carrier wave according to the alignment pattern; to insert TFMp matrix information into the head frame group of TDS-OFDM; finally to send the complete signal of TDS-OFDM.

The invention discloses a method, device and system for reporting a channel quality indicator, which are used for solving the problem that resources can not be correctly distributed and dispatched because a network side cannot accurately master interference to a terminal in a multi-point cooperative transmission technology. The method comprises the following steps: UE (User Equipment) feeds back an initial CQI (Channel Quality Indicator) of each device in a measurement set to a network side device according to measuring reference information transmitted by each device in the measurement set; and the network side device calculates a target CQI of the UE according to the initial CQI of each device fed back by the UE and channel matrix reference information fed back by the UE. Therefore, the network side can accurately master the interference to the UE so as to correctly execute UE dispatching, resource distribution and MCS (Modulation and Coding Schemes) selection, thereby system throughout under coordinated multipoint transmission is effectively increased and system performance is improved.

A cellular communication system comprises an access point (101) which supports an underlay cell of a first cell on an underlay frequency using another frequency. A proximity detector (113) detects user equipment (109) in response to a wireless transmission therefrom, which uses a different transmission technology from a transmission of the cellular communication system. In response to the proximity detection, the access point (101) temporarily transmits a pilot signal on the first cell frequency. The user equipment (109) is then switched to the access point (109) and the underlay frequency in response to a detection indication from the user equipment (109) indicating that the pilot signal has been detected. Following the switch the access point (101) terminates the transmission of the pilot signal.

The invention discloses a method for selecting a CoMP downlink cell cooperation set in an LTE-A system, which mainly solves the balance problem between signaling and feedback overhead required for cooperation and performance gain of the system. The method comprises the following steps of: (1) calculating signal-interference-noise ratios (SINR) of all users in a cell, and screening a user set for CoMP according to the SINR threshold; (2) picking CoMP users i to be served according to a proportional fair algorithm, and recording the service cell of the users as j; (3) selecting a candidate set according to the positions of the users i in the service cell j; (4) determining types of the users i according to the reference signal receiving power of the users i; and (5) selecting different cooperation set selecting methods according to the types of the users i. The method can reduce the scheduling complexity at the same time of ensuring the throughput gain of the system, meanwhile, optimizes the performance of two modes by adopting the different cell cooperation set selecting methods for the users in the two modes of CoMP SU-MIMO and CoMP MU-MIMO respectively, and can be used for selecting mutually cooperative cells under cooperative multi-point transmission technology.

The invention relates to a method for constructing a full-coverage all-direction resource sharing family endowment service system, belonging to the field of the information processing and transmission technology. The invention is technically characterized by mainly comprising a system platform, an Internet website subsystem, a call platform subsystem, an Internet aged-people interaction subsystem, a 120 first-aid supplementary information service subsystem, a home delivery logistics subsystem, home service scheduling subsystem and a call termination subsystem, wherein the call termination subsystem mainly comprises a computer, dual tone multi-frequency signal receiving and transmitting equipment, a telephone terminal and computer software. The family endowment service system constructed with the method can be used as an integrated network service system in the community and further as a digital information platform. The method of the invention is not only a special method applied to a special object but also a general method for constructing an information processing and transmission system serving the public. For example, the method of the invention can be used for constructing the full-coverage all-direction resource sharing life insurance service system.

The invention relates to a training examination system, in particular to a training examination system for technical staffs about operation and maintenance of a converter station of a high voltage direct current power transmission system. The intelligent training examination system of the high voltage direct current power transmission technology consists of a direct current power transmission simulation system, a database, a training examination system server, a router, a remote access server and an instructor subscriber terminal, and a plurality of local student subscriber terminals or a plurality of remote student subscriber terminals. The system can be adopted to undergo on-line learning, training and examination which comprises a theory training examination and a direct current power transmission system practical operation training examination, thereby automatically building the questions, timing, estimating scores and forming score reports based on the set question types and difficulties and meeting demands of normalized and intelligentized training and examination on primary workers, secondary workers and advanced workers for the operation and the maintenance of the direct current power transmission system.

The invention discloses a system and a method of dynamic management for construction quality of an asphalt concrete pavement. The system gathers a plurality of subsystems of the dynamic management for the construction quality of the asphalt concrete pavement and a remote quality monitoring and controlling system, wherein the subsystems are composed of a production mix proportion monitoring subsystem, a discharging temperature monitoring subsystem, a construction environment monitoring subsystem, a pave data monitoring subsystem, and a rolling data monitoring subsystem. The technical scheme is that the sensing technology based on the architecture of the Internet of Things and the transmission technology base on 2.5 G and 3G are fully utilized to report data information of a manufacturing process, a construction process, and the like of asphalt mixture to a remote server through a communicating module, so as to dynamically and truthfully reflect the construction quality condition. The idea of the system and the method is to track and observe project processes, and compare the observation result with a planned value, and once a deviation is found, the rectification is performed for prevention.

The invention discloses an automatic gesture recognizing method and system based on the wireless network signal transmission technology. The method comprises the following steps that firstly, a wireless receiving end receives a wireless signal from a wireless transmitting end and assesses channel state information; the changing abnormality of the channel state information is recognized through an abnormality detection algorithm; the gesture action is recognized based on an SVM algorithm capable of distinguishing a plurality of target action types and with the mode that the human body gesture action causes the channel state information change as the target action type, and if recognition can be achieved, the definition of the gesture can be answered. According to the recognizing method, the false alarm rate is low; an existing wireless network and an existing device are utilized, other specific detecting devices do not need to be installed, and high popularity is achieved. Meanwhile, a detected person does not need to carry any additional sensing devices, and inconvenience caused when the detected person carries the detecting devices is avoided.

The invention belongs to the field of cooperative transmission technology, and discloses an energy acquisition cooperative network resource distribution method based on simultaneous transmission of information and energy. The method comprises the steps of acquiring channel state information on each sub-carrier in a transmission time slot; according to a resource distribution algorithm, calculating optimal power distribution on each sub-carrier and determining sub-carrier distribution, increment strategy and optimal power splitting ratio; in a first time slot in a useful data transmission process, broadcasting data in each sub-carrier according to a calculated power, receiving by a relay and a target end; wherein a relay forwarding strategy is utilized, one part of the source transmitting power is used for information transmission of the time slot, and the other part is acquired by the relay for information transmission of a next time slot; and the increment strategy determines a transmission strategy of the second time slot, namely the relay forwards the information to a target end according to the calculated power or transmits new data to the target end according to the power which is obtained through calculation. The energy acquisition cooperative network resource distribution method improves system capacity and spectrum utilization rate on the condition that a requirement for lowest rate of each user is satisfied.

An automatic detection method and a system for human body falling-over are based on a wireless network signal transmission technology. The method comprises the following steps: a wireless receiving terminal receives wireless signals from a wireless transmitting terminal and assesses channel state information; abnormity of the channel state information change is identified by using an abnormity detection algorithm; based on a one-class support vector machine which distinguishes a target motion kind from other motion kinds, an abnormity mode that a human body falling-over motion leads to a channel state information change is set as the target motion kind to determine whether a human body falling-over motion happens; if the human body falling-over motion happens, a falling-over alarm signal is emitted. The false alarm rate of the detection method provided by the invention is low; by utilizing a present wireless network and a device, other specific detection devices are not needed, and the detection method is high in universality; and at the same time people to be detected do not need to carry any extra sensing equipment, and inconvenience caused by that people to be detected carry detection equipment is avoided.

The invention discloses a method, a system and equipment for multi-point cooperative transmission among a plurality of cells; the method is applied to a communication system consisting of base stations of at least two cells and at least one piece of user equipment (UE), wherein one cell is the place where the UE is located, and other cells are cooperative cells corresponding to the cells; the method comprises the following steps that: the UE receives the physical downlink control channel (PDCCH) signal of the base station of the cell, and the PDCCH signal carries instruction information; the UE receives the data signals sent by the base stations of the cell and the cooperative cells according to the instruction information carried by the PDCCH signal; and the UE demodulates the data signals sent by the base stations of the cell and the cooperative cells to obtain the data sent by the base stations of the cell and the cooperative cells. The invention solves the restriction problems that the traditional multi-point cooperative transmission technology can be only applied to cells with the same frequency and the frequency diversity can be only applied in the cells.

The invention relates to a system and method for acquiring the monitoring and warning information of gas disasters of a coal mine, and belongs to the technical field of monitoring and warning of gas disasters of a coal mine. The system is realized by and the method comprises the following steps: firstly, automatically obtaining and transmitting the basic safety information of a mine by utilizing an underground transmission technology, an underground looped network and a local area network on the ground and through a data interface program of a mine monitoring and controlling system of research and development series, a data transmission module of detecting and probing equipment and an information acquisition terminal based on an anti-explosion computer and an anti-explosion mobile phone; filtering, correcting, ordering and classifying the obtained basic safety information of the mine according to an information screening algorithm for research so as to form the monitoring and warning information of gas disasters of the coal mine; finally, formulating retrieval logic of monitoring and warning information and information transmission rules of monitoring and warning information through an developed acquisition and management platform of the monitoring and warning information; automatically extracting corresponding data from an acquisition database of the monitoring and warning information; and transmitting the extracted data to a warning system of gas disasters of the coal mine so as to realize the automatic real-time acquisition of the monitoring and warning information.

The invention provides a configuration and sending method of uplink signal transmission resource, a base station and a user terminal (UE). The base station configures resource corresponding to the uplink pilot time slot (UpPTS) with more than two of orthogonal frequency division multiplexing (OFDM) symbols to be uplink signal transmission resource, or configures N OFDM symbols in guard space (GP), which are adjacent to UpPTS and resource corresponding to UpPTS, to be uplink signal transmission resource, and informs the uplink signal transmission resource configuration information to UE through system broadcasting or high-level signaling, wherein N is an integer larger or equal to 1. The invention can meet the user requirement that more SRS resources are occupied in the multipoint cooperative transmission technology and solve the problem that the SRS resource is not enough.

The estimation method for time-frequency joint channel in TDS-OFDM space-frequency code comprises: 1) the transmission antennas of T1 and T2 executes space-frequency diversity code; 2) for some rule, alternative transmitting the TPS information after error correction coding carried on OFDM sub-carrier; 3) taking time-frequency joint channel estimation with time-domain PN sequence and TPS information; 4) space-frequency decoding to recovery transmission information. This invention changes little to original transmitter system, simple, fast and accurate, and supports soft-failure to improve reliability.