1011 results about "Data transmission time" patented technology

Disclosed is an uplink random access procedure in an NB-TDD (Narrow Band Time Division Duplexing) system. To achieve an acknowledgement for data transmission from a UTRAN (UMTS Terrestrial Radio Access Network), a UE selects one of a plurality of sync codes by which the UTRAN identifies UEs that request data transmission and transmits the selected sync code in a time slot of a sub-frame to the UTRAN. Then, the UE receives the sync code information, information about the arrival time of the sync code, time update information indicating a variation in the transmission time of data, and power information indicating an adjustment to a power gain in the UE from the UTRAN on an FPACH (Fast Physical Access Channel). The UE transmits the data on a P-RACH (Physical Random Access Channel) mapped from the FPACH according to the time update information and the power information.

A two wire communication system capable of transmitting data and transferring power by the used of an electrical bi-polar waveform across a two wire conductor from a controller in communication with the two-wire conductor to at least one module in communication with the controller and capable of transmitting data from the module to the controller; and a remote electrical device in communication with the controller. Usable data may be continuously transmitted across the two wire conductor independent of and during power transmission between the controller and the at least one module without loss of data transmission time and without affecting the transfer of power to the at least one module. The data is transmitted across the two wire conductor to the modules by pulse duration signals at the same time power is transmitted to the modules. The system is capable of using up to 100% of transmission time to transmit data without affecting transfer of power to the at least one module.

The invention discloses a method, equipment and a system for transmitting data, which belongs to the field of wireless communication. The method comprises the following steps of: acquiring transmission indication information of user equipment and receiving uplink service data transmitted by the user equipment through an uplink control plane signaling, wherein the transmission indication information is used for indicating to transmit service data through a control plane signaling; and according to the transmission indication information, transmitting the uplink service data to a server through a core network gateway entity. The equipment comprises an acquisition module and an uplink transmission module. The system comprises a mobile management entity, a server connected with the mobile management entity in a communication mode, and the user equipment. The method, the equipment and the system save network resources and reduce data transmission time compared with the prior art.

The invention relates to a real-time synchronization method based on PTP precision clock synchronization protocol of IEEE1588. The research on hardware of IEEE1588 protocol is still a blank at present. The method of the invention includes the following steps: sending messages; receiving messages; correcting the local system time; selecting the optimal master clock. And the synchronization action is different when the corresponding equipment is a master clock or a slave clock. The hardware method reduces the inherent fluctuation of data transmission time of internet technology, while not affecting the scope of precision control, thus resolving the problem of the clock uniformity and precision in a distributed network system.

The invention discloses a method for optimizing the data transmission of a mobile terminal and the mobile terminal. The method comprises the following steps that: data acquisition time interval and data transmission time interval are set respectively; when the timing of the data acquisition time interval is over, the mobile terminal acquires the data and caches the acquired data locally; after the data acquisition operation is finished, the mobile terminal starts the timing of the data acquisition time interval; when the timing of the data transmission time interval is over, the mobile terminal initiates to establish an air interface connection flow and transmits the locally-cached data in batch through the air interface connection; and after the transmission operation is finished, the mobile terminal releases air interface resource and starts the timing of the data transmission time interval, wherein the air interface is not used during the data acquisition; the air interface connection is established again during the data transmission; the air interface resource is released after the transmission is finished; and therefore, the occupation ratio of the air interface resource is greatly reduced.

In an environment in which a macro base station and a low transmission power base station exist, the ratio of the interference reduction time period of the macro base station is optimized, and the throughput of the low transmission power base station is improved, while minimizing a reduction in throughput. The macro base station causes a high interference to other base stations and one or a plurality of low power nodes (LPN) subjected to interference from the macro base station. The macro base station sets first and second data transmission time periods and then determines the ratio of the second time period and the pattern of the first time period and the second time period based on communication quality in the first time period and communication quality in the second time period of the macro base station and the LPN.

A relaying device for relaying data transferred from first storage unit to a second storage unit, is provided outside a range presumed to be affected by a disaster, when a disaster, such as an earthquake, has broken out in an installation site of a host of a normal system (host computer) and the first storage unit. Moreover, the relaying device is placed at such a location that the data transfer time between the first storage unit and the relaying device is shorter than the data transfer time in case the first and second storage units directly transfer data with each other. On receipt of data from the first storage unit, the relaying device notifies the first storage unit of the completion of reception of the data before completing transmission of the data to the second storage unit.

Although music program data has been recorded on a disc, imperfect index data or a signal has been recorded so that music program data is prohibited from being reproduced. To allow music program data to be reproduced, the index data is rewritten to perfect index data or a permission signal that allows music program data to be reproduced is transmitted through a communication line. Thus, music program data can be reproduced from the disc. Since music program data is not directly transmitted, the data transmission time is shortened. The music program data can be downloaded at high speed. In addition, the charging process can be smoothly performed. Moreover, music program data can be prevented from being illegally used.

The invention discloses a data transmission method of edge MBMS service and a correlation device. The method is applied to a data transmission system of MBMS service. The system internally comprises a center BM-SC disposed at a core network, an edge BM-SC disposed at the edge of the network, and an MBMS GW. The method comprises the following steps: the center BM-SC creating a control surface bearer context; the center BM-SC sending a session starting request to the edge BM-SC so as to enable the edge BM-SC to create a user surface bearer context; and the center BM-SC receiving a session starting response sent by the edge BM-SC; and the center BM-SC issuing a service key to the edge BM-SC so as to enable the edge BM-SC to encrypt data of the edge MBMS service by use of a service key pair and send the data to UE through the MBMS GW. According to the invention, data transmission time delay of the edge MBMS service can be reduced, and application of the bandwidth of the core network for data transmission of the edge MBMS service is reduced.

The present invention discloses a wireless mobile communication system for transferring MBMS data from an access gateway to plural wireless base stations and transmitting the MBMS data from the plural wireless base stations to a wireless mobile station at the same time. The system includes a transferring part included in the access gateway for copying the MBMS data in a number corresponding to the number of the plural wireless base stations, adding a header indicative of data transmission time to the MBMS data, and transferring the MBMS data to the plural wireless base stations; a transmitting part included in each the plural wireless base stations for extracting the data transmission time from the header of the transferred MBMS data, deleting the header from the MBMS data, and transmitting the MBMS data to the wireless mobile station.

Each transport format contains control parameters according to which data are mapped from at least one logical channel onto at least one transport channel by a data link layer protocol unit, with the control parameters in the transport formats containing information regarding that or those data link layer protocol buffer storages and/or that or those data link layer data streams from which the data to be transmitted need to be transmitted in a data transmission time interval.

The invention discloses an unmanned aerial vehicle data collection method based on minimized information age. The method comprises the following steps: (1) a data center u_0 acquires positions of M sensing nodes in a wireless network; (2) the data center u_0 executes a clustering algorithm according to uploading time and clustering weight gamma of the sensing nodes; (3) a path planning algorithm is executed according to the obtained data uploading time and flight time eta (k, k <^'>) of an unmanned aerial vehicle; (4) an unmanned aerial vehicle data collection scheme corresponding to the current clustering weight gamma is stored; and (5) the unmanned aerial vehicle starts from the data center, and accesses data collection points one by one according to the optimal flight path u<^*> of theunmanned aerial vehicle. The method adjusts in advance the positions of the unmanned aerial vehicle data collection points and the distance between the unmanned aerial vehicle data collection points and the sensing nodes by adopting a clustering method, and effectively balances data transmission time of all sensing nodes and the flight time of the unmanned aerial vehicle, so that the information age of the sensing nodes is not sharply increased with the increase of the network scale, and the method is suitable for different wireless sensing network scales.

An image-forming-device management system includes an image-forming device, a data communication device and a central management device. A real-time clock circuit (RTC) of the data communication device compares a current time with a predetermined data transmission time. If the current time matches with the data transmission time, the RTC generates a data-transmission request that requests for data transmission to the central management device. A CPU included in a part constantly supplied with electricity from a power source in the data communication device instructs a power-source controller to supply the electricity from the power source to a communication-related part including a network control unit (NCU), a modem and an image-forming-device interface, thereby activating the communication-related part. Subsequently, the CPU calls out the central management device by using the NCU, and transmits data acquired from the image-forming device in advance, to the central management device by using the modem.

The invention discloses an electromagnetic distance measurement guide system for a double solenoid set during drilling. The system can provide accurate guide measurement and calculation for well track control of double horizontal wells, communicated wells, U-shaped wells, infill wells, and other complex-structure wells. The system mainly comprises a double solenoid set pup joint, a converted MWD,a ground display system, ground equipment, and the like. The double solenoid set pup joint serving as a magnetic signal emission source is put into a drilled well, two rotating magnetic fields with different frequencies are generated, and the system has the measurement accuracy equivalent to the RMRS. During measurement and calculation, the spacing between adjacent wells and relative azimuth can be accurately detected and calculated without dragging the double solenoid set pup joint. Therefore, the measurement can be finished in short time. The data analysis and adjacent well spacing calculation program of the system can be put underground, only a little of calculated necessary data is transmitted to the ground, and the data transmission time is saved. Meanwhile, by improving the current intensity of a solenoid coil, and the like, the intensity of the magnetic signal emission source is improved, and the distance measurement range of the system is easily increased. The system has the advantages of high guide accuracy, wide distance measurement range, short measurement time, and simple structure, and is an effective high-tech means for the detection and control of the distance between the adjacent wells during drilling.

The invention discloses a trunking semi-persistence scheduling resource allocation method, a base station and a terminal. After the base station establishes SPS bearing for a trunking group, SPS configuration information and trunking semi-persistence scheduling identifier used for identifying semi-persistence bearing of the trunking group are sent to the trunking group through a trunking control channel, wherein the SPS configuration information includes a business data transmission period; after notifying the trunking group to activate the SPS bearing, the base station periodically transmits the trunking semi-persistence scheduling identifier, an semi-persistence scheduling resource instruction in DCI (downlink control information) generated when the SPS bearing is activated and the SPS configuration information in the trunking control channel, and the semi-persistence scheduling resource instruction includes business data transmission time frequency resources. The scheme can solve the problem of SPS scheduling in lagged access to trunking user equipment, thereby reducing use of PDCCH resources of a whole trunking system, and improving the resource utilization rate of the whole system.

A system for printing data from a portable terminal including: a portable terminal for storing printable printing data and transmitting data selected by the user to an external device using short-distance wireless communication, when the user's request for printing the data is present; and a wireless printer that receives the selected printing data by the short-distance communication with the portable terminal and prints the received data. In the system, wire cables are not necessary for each piece of equipment and the data transmission time is reduced, because the data of the portable terminal is directly transmitted to the wireless printer and is printed thereby without using an intermediate device such as a PC.

The invention discloses a channel access method and a node. The method comprises the following steps of: randomly selecting a backoff period XB according to a backoff exponent (BE), wherein the XB is equal to X*a UnitBackoffPeriod, and the X is a randomly selected integer in a range of 0 to (2BE-1); when the X is more than or equal to a preset value, determining a middle backoff period which is smaller than the backoff period, performing backoff until the middle backoff period is over, and performing a clear channel assessment (CCA), transmitting data if a channel is clear, continuing the backoff until the backoff period is over if the channel is not clear, performing the CCA again, and executing channel access operation according to a CCA result when the backoff period is over; and otherwise, when the X is less than the preset value, performing the backoff until the backoff period is over, performing the CCA, and executing the channel access operation according to the CCA result. According to the method and the node, when the backoff period is long, the CCA can be performed after performing backoff until the middle backoff period is over, and the data are transmitted when the channel is clear, so that data transmission time delay can be reduced.

The embodiment of the invention discloses a UWB system positioning base station calibration method and a device thereof. The method comprises the following steps: acquiring the data transmission timeof the communication data transmitted between the target base station and the base station to be calibrated based on the UWB transmission channel in the UWB positioning system, and calculating the base station distance between the target base station and the base station to be calibrated according to the time and the data transmission rate; A target base station and a base station to be calibrateare obtained in a coordinate system with a current position environment as a reference, and calculating the coordinate distance between the real coordinate value of the target base station and the base station to be calibrated based on the azimuth angle of the reference coordinate system, and adjusting the real coordinate value to be calibrated according to the relationship between the coordinatedistance and the distance of the base station and the azimuth angle. By adopting the invention, the coordinate value of the base station to be calibrated measured manually is adjusted according to theaccurate distance between the target base station and the base station to be calibrated through accurately calibrating the coordinates of the target base station, the calibration precision of the base station can be improved, and the accuracy of the UWB positioning system can be further improved.