30results about How to "Reduce the probability of transmission failure" patented technology

The embodiment of the invention discloses an information processing method, user equipment and base station. The method includes starting a first timer when receiving an uplink transmission instruction; when the first timer is overtime, starting a second timer; and within the timekeeping time of the second timer, monitoring a Physical Downlink Transmission Control Channel (PDCCH).

The application discloses a document transmission method. The document transmission method comprises the following steps: segmenting data of a transmitted document into document fragments with a preset number by adopting a preset fragment size value as a unit; transmitting the document fragments, and respectively recording the transmission rate of each document fragment; determining the network transmission rate of a next moment according to the transmission rate of each document fragment; updating the fragment size value according to the network transmission rate of the next moment, and segmenting data which are not transmitted in the transmitted document into document fragments with the preset number by adopting the updated fragment size values as a unit; and re-determining the transmission rate of a network at the next moment according to the transmission rate of the current document fragment so as to update the fragment size value, segmenting data which are not transmitted into the document fragments with the preset number, and transmitting the data of the transmitted document. By matching the fragment size value with the transmission rate of the network at the next moment, a purpose for adequately utilizing the current network transmission data flow capacity and reasonably utilizing the data transmission flow capacity of the network can be realized.

The invention provides a cognitive radio multi-channel measurement and control (MAC) protocol. The protocol has the basic thought of improving network performance by using the characteristic of dynamic change of frequency spectrum of a cognitive radio multi-channel environment. At a frequency spectrum cognition stage, the protocol discovers available idle frequency spectrum in a synchronous time slot mode by adopting a method for perceiving the frequency spectrum in sequence by a controller. Meanwhile, the protocol defines the channel availability, and preferably selects an idle channel with high availability for data transmission. The protocol ensures reduction of cognitive user conflicts and reliability of data channels in a cognitive radio network so as to improve the throughput of the cognitive radio network.

The invention relates to a data transmission method and device, a computer device and a storage medium. The method comprises the steps of acquiring target data to be transmitted; splitting the targetdata into k to-be-transmitted sub-data, wherein k is an integer greater than 1; establishing data transmission channels with N target servers in a server set separately, wherein N is an integer greater than 1; and sending a data transmission request to a corresponding target server through the data transmission channel, wherein the data transmission request carries one or more sub-data, so as to enable each target server to store the received sub-data in a preset storage device. The method can improve transmission efficiency and shorten transmission time.

The invention discloses event sending and receiving handling method and system. The method comprises the steps of sending service event data in a source application system to a sending array through an event sending device; generating an unique identifier corresponding to the service event data; reading the service event data in the sending array through an event transferring device; transferring the service event data into an event receiving device according to a configurable event transferring table; receiving the service event data transferred by the event transferring device through the event receiving device. According to the handling method, the systems can be coordinated by transmitting an event message, the synchronizing and complete decoupling of the event sending and transferring of a receiving side can be achieved, and therefore, the system performance can be improved, and the application expandability is increased; the event can be temporarily stored into the system array to wait for handling at service peak period, thus the pressure on an event receiver can be reduced, the impact of the service concurrence peak on the system can be effectively resisted, and the system is high in response delay performance.

The invention discloses a deep-space network routing method with a QoS (Quality of Service) assurance, and solves the problem in the prior art that deep-space network service requirements can not be satisfied. The method particularly comprises the following steps: acquiring all link information in the network at first, correcting the communication time slots, then bringing link transmission time delay and link transmission rate into consideration to calculate the transmission time slots, and finally, calculating the path time delay according to the path transmission time to select the minimal path as the optimal path. By adopting the method, the calculated and acquired path time delay is more accurate, the selected optimal path has the shortest time delay, and the QoS requirement for the time delay of the service can be satisfied while the service throughput is guaranteed; and the service transmission time can be set more reasonably, the data transmission blindness is small, the probability of false transmission due to disconnection of links when data is transmitted on the links is low, and the network performance is improved.

The invention discloses a method of disposing an internal collision of enhanced distributed channel access and solves the problems that unfair of low priority caused by the internal collision in the prior art. The steps comprises that firstly, a high priority queue directly sends data; secondly, a low priority queue chooses to retreat or send the data again due to the fact that whether the high priority queue is succeed in sending the data or not; and finally, whether the data is sent or not is determined according to the number of queues to be sent in nodes. A simulation result proves that the method of disposing the internal collision of the enhanced distributed channel access has the advantages of reducing time delay of sending the data through the nodes, guaranteeing the throughput of business, simultaneously satisfying service quality need of time delay from the business, reducing outer collision probability of sending the data through the nodes, reducing the number of failures caused by outer collision during the link transmitting of the data and improving the property of a communication network.

The invention discloses a method, apparatus and system for realizing computer room-spanning data transmission. The method comprises the following steps: inputting to-be-sent data of a sending party computer room into a sending buffering unit; sending notification for being ready for receiving data to a receiving party computer room side and receiving buffer reception state information returned by the receiving party computer room side; and according to the buffer reception state information, sending the data in the sending buffering unit to the receiving party computer room side. According to the technical scheme, because the sending part will carry out data transmission according to the capability of the receiving party, the probability of data transmission failure can be reduced, thereby reducing the number of times of data retransmission and improving the data transmission efficiency.

The invention discloses a request message transmission method and device to solve a problem that the probability of failure of request message transmission can be increased to reduce the reliability of the request message transmission when an ICT network in the prior art transmits a request message. The method comprises the following steps that a dispatcher determines a corresponding first drive adaptive plug-in group according to information of a first controller, which is included in the received request message, wherein the first controller is connected to at least one drive adaptive plug-in included in the first drive adaptive plug-in group; and the dispatcher screens out at least one to-be-selected drive adaptive plug-in in the normal running status from the at least one drive adaptive plug-in, and finally, the request message is sent to the first controller through one to-be-selected drive adaptive plug-in. According to the method and the device, it is guaranteed that the dispatcher transmits the request message to the first controller successfully through a target drive adaptive plug-in.

Periodic Radio Resource Management (RRM) reporting from user equipment (UE) is beneficial for a network to efficiently select a carrier with a cleaner channel to serve the UE. To enable periodic RRM reporting from the UE, periodic beacon signal transmission for UE measurements is necessary. However, in a shared spectrum, precise periodic transmission cannot be guaranteed due to channel contention. A method of transmission with periodic time windows for beacon signal transmission is proposed to resolve potential issues. Under the proposed solution, beacon signal can be transmitted in a certain periodic fashion without frequent physical layer signaling. Furthermore, periodic beacon signal transmission for measurements can be kept with low transmission failure rate due to channel contention.

The invention provides a method for adaptively adjusting data stream load between DSPs (Digital Signal Processor), and belongs to the technical field of signal processing. The method comprises the following step: sequentially sending data in a sending queue of a sending end DSP to a receiving queue of a receiving end DSP according to the period of a timer, wherein the period of the timer is adjusted according to the number of data packets in the sending queue; when the sending queue is full, the period of the timer is set at a lower limit value; when the sending queue is empty, the period of the timer is set at an upper limit value; and when the sending queue is not empty and not full, the period of the timer is linearly adjusted between the upper limit value and the lower limit value, andthe more data packets in the queue are, the shorter the timer period is. According to the method for adaptively adjusting the data stream load between the DSPs provided by the invention, a data packet interval can be adaptively adjusted along with the sending frequency of the data packets, which reduces the probability of sending failures caused by too large short-time load of a data pipeline.

The invention provides a symmetric encryption and decryption algorithm subpackage processing method, which comprises the following steps of: S1, dividing an x-bit plaintext into front y bits and rear z bits, generating a y-bit ciphertext from the front y bits through a symmetric encryption algorithm with the same key, and ensuring that the encryption length is y bits; s2, the rear z bits of the x-bit plaintext generate z-bit ciphertext through a symmetric encryption algorithm with the same key, x, y and z are positive integers and are integer multiples of the minimum length of the encryption algorithm, and the rear z bits of the plaintext resume through a breakpoint; and S3, connecting the ciphertexts obtained through the two times of segmentation encryption in the S1 and the S2 together to obtain a final ciphertext. The method has the advantages that: 1, time consumption can be saved under the condition that a transmission medium is unstable; and by adopting segmented encryption transmission, the probability of transmission failure is greatly reduced, and the wasted time is in direct proportion to the data length even if the transmission failure occurs. Therefore, the time overhead is saved. Under the condition that the transmission capacity of the transmission medium is insufficient, subpackage processing is adopted, and the limitation of the transmission medium can be avoided;

The embodiment of the invention discloses an information processing method, user equipment and base station. The method includes starting a first timer when receiving an uplink transmission instruction; when the first timer is overtime, starting a second timer; and within the timekeeping time of the second timer, monitoring a Physical Downlink Transmission Control Channel (PDCCH).

The invention discloses a resource processing method and device and a readable storage medium, relates to the technical field of communication, and aims to improve the success rate of direct link data packet transmission. The method comprises the following steps: a first terminal determines a first conflict resource set in a resource awareness mode; the first terminal determines a second conflict resource set, and the second conflict resource set is determined according to coordination information of a second terminal; the first terminal excludes resources from an initial candidate resource set according to the first conflict resource set and the second conflict resource set to obtain a residual candidate resource set; and if the number of the resources in the remaining candidate resource set does not meet the preset requirement, the first terminal excludes the resources from the initial candidate resource set again. According to the embodiment of the invention, the success rate of direct link data packet transmission can be improved.

The invention discloses a method for dynamically utilizing data packet aggregation transmission based on a network state, for mainly solving the problem that the performance of a network is degraded when data packet aggregation transmission is used under the condition that the network is not in a good state in the prior art. According to the scheme, the method comprises the following steps: firstly, counting the collision occurrence rate p of the network within present time through a wireless access point AP, setting a collision occurrence rate threshold th, subsequently comparing the collision occurrence rate p with the collision occurrence rate threshold, if p is greater than th, transmitting a single data packet at a wireless station and the wireless access point AP, and if p is less than or equal to th, packaging a plurality of data packets handed down from an upper computer into one medium access control (MAC) frames for transmitting through the wireless station and the wireless access point AP. By adopting the method, the data transmission time delay of the network is reduced, the performance of the network is improved, and the method can be applied to heavy-load network communication.

The present application discloses a file transmission method, including: dividing a preset number of file fragments from the transmitted file data in units of a preset fragment size; transmitting file fragments, and recording the transmission rate of each file fragment respectively ; Determine the network transmission rate at the next moment according to the transmission rate of the file segment; update the fragment size value according to the network transmission rate at the next moment, and use the updated fragment size value as a unit, among the untransmitted data in the transmitted file Divide a preset number of file fragments; repeatedly determine the network transmission rate at the next moment according to the current file fragment transmission rate to update the fragment size value, divide the preset number of file fragments from the untransmitted data and Transfer is transferred file data. This application achieves the purpose of making full use of the current network transmission data traffic capacity and rationally utilizing the network data transmission traffic capacity by means of real-time adaptation between the fragment size value and the network transmission rate at the next moment.

The invention discloses event sending and receiving handling method and system. The method comprises the steps of sending service event data in a source application system to a sending array through an event sending device; generating an unique identifier corresponding to the service event data; reading the service event data in the sending array through an event transferring device; transferring the service event data into an event receiving device according to a configurable event transferring table; receiving the service event data transferred by the event transferring device through the event receiving device. According to the handling method, the systems can be coordinated by transmitting an event message, the synchronizing and complete decoupling of the event sending and transferring of a receiving side can be achieved, and therefore, the system performance can be improved, and the application expandability is increased; the event can be temporarily stored into the system array to wait for handling at service peak period, thus the pressure on an event receiver can be reduced, the impact of the service concurrence peak on the system can be effectively resisted, and the system is high in response delay performance.

The invention provides a logistics tracing method capable of sharing data. The system comprises a plurality of pieces of logistics tracing equipment arranged on the same vehicle. The logistics tracingequipment is characterized by comprising a communication module in data communication with a server, a positioning module for positioning, a sensor for detecting the state of an article and a batterypower supply module, and one of the logistics tracing equipment is selected to periodically collect data of other equipment and periodically transmit the data to the server. The method has the advantages that data sharing in the same vehicle is utilized, so that unnecessary network transmission and frequent positioning of other devices are saved, power consumption of the devices is reduced, the problem of data inconsistency caused by packet loss of some devices in data transmission is solved, and the problem of data consistency of the devices is solved.

Provided are a method and device for transmitting a data packet, which relate to the field of communications. The method comprises: according to the number of times of transmitting a data packet and the number of times of retransmitting the data packet within a first cycle, calculating the retransmission rate of the data packet; if the retransmission rate of the data packet is greater than or equal to a preset first retransmission rate, reducing an air interface modulation and encoding order; and within a second cycle, transmitting the data packet according to the air interface modulation and encoding order, the second cycle being the next cycle closest to the first cycle. The device comprises: a calculation unit, a reduction unit and a transmission unit. By means of the present invention, an appropriate air interface modulation and encoding order is obtained according to the retransmission rate of a data packet, and the data packet is transmitted according to the air interface modulation and encoding order, so that the probability of transmission failure of the data packet can be reduced, thereby saving air interface resources, and improving the efficiency of transmitting the data packet.

The invention discloses a deep-space network routing method with a QoS (Quality of Service) assurance, and solves the problem in the prior art that deep-space network service requirements can not be satisfied. The method particularly comprises the following steps: acquiring all link information in the network at first, correcting the communication time slots, then bringing link transmission time delay and link transmission rate into consideration to calculate the transmission time slots, and finally, calculating the path time delay according to the path transmission time to select the minimal path as the optimal path. By adopting the method, the calculated and acquired path time delay is more accurate, the selected optimal path has the shortest time delay, and the QoS requirement for the time delay of the service can be satisfied while the service throughput is guaranteed; and the service transmission time can be set more reasonably, the data transmission blindness is small, the probability of false transmission due to disconnection of links when data is transmitted on the links is low, and the network performance is improved.

The invention discloses a method of disposing an internal collision of enhanced distributed channel access and solves the problems that unfair of low priority caused by the internal collision in the prior art. The steps comprises that firstly, a high priority queue directly sends data; secondly, a low priority queue chooses to retreat or send the data again due to the fact that whether the high priority queue is succeed in sending the data or not; and finally, whether the data is sent or not is determined according to the number of queues to be sent in nodes. A simulation result proves that the method of disposing the internal collision of the enhanced distributed channel access has the advantages of reducing time delay of sending the data through the nodes, guaranteeing the throughput of business, simultaneously satisfying service quality need of time delay from the business, reducing outer collision probability of sending the data through the nodes, reducing the number of failures caused by outer collision during the link transmitting of the data and improving the property of a communication network.

The invention discloses a method for dynamically setting the minimum contention window value of a node according to the number of retransmission times, which mainly solves the problem in the prior art that the static setting of the minimum contention window value causes network performance to decline. The implementation steps are: 1) the node sends the current data packet, and records the number of retransmissions it successfully sent; 2) compares the recorded number of retransmissions with the two set thresholds: when the number of retransmissions is less than the first threshold value, set the minimum contention window value to the default minimum contention window value in the communication standard; when the number of retransmissions is greater than the first threshold and less than the second threshold value, set the minimum contention window value to the default minimum α times the contention window value; when the number of retransmissions is greater than the second threshold, set the minimum contention window value to β times the default minimum contention window value in the communication standard; 3) After the minimum contention window value is set, the node continues to compete channel. The invention reduces the time delay of nodes sending data and improves the performance of communication network.

The invention discloses a Zigbee information channel dynamic selection method based on real-time availability. In the invention, the concept of information channel availability is provided for the first time, the information channel availability is updated by the availability algorithm in real time, and information channels can be dynamically selected according to availability sequence in an information channel resource pool, which is marked by a broken line in the figure. Parameters for the information channel availability indicate the vacancy rate and communication quality of the information channel and show practical available conditions of the information channel. Therefore, the parameters for the information channel availability can be used for guiding selection of the information channel in practical data transmission, so as to provide a communication support, increase the data transmission success rate, and reduce the collision rate and retransmission rate to the largest extent. Based on the vacancy rate and quality of the information channel, data transmission results and other parameters, the invention provides the real-time availability algorithm. The real-time availability algorithm not only provides a high-quality vacant information channel with more selection chances, but also ensures the fairness of information channel selection to the largest extent and enables the information channel to be selected by relative fair chance, thereby improving the utilization rate of the information channel. In the invention, the strategy to build the information resource pool to manage information channel resources is provided; information channels are sequenced based on the parameters for the information channel availability; and the ZigBee information channel is selected according to the sequencing result, thereby realizing the Zigbee information channel dynamic selection method based on real-time availability.

The invention discloses a frequency pulse selector and selection method. The frequency pulse selector comprises a complex programmable logic device (CPLD), a lower computer and a menu selector, wherein the lower computer is connected with the input end of the CPLD, and the menu selector is connected with the output end of the CPLD. An upper computer comprises a data providing module, and the data providing module is used for providing first communication data. The lower computer comprises a data conversion module, the data conversion module is used for generating fractional frequency signals corresponding to the number of fractional frequencies and generating monocycle pulse signals corresponding to the monocycle pulses in number. The CPLD is used for receiving clock signals, generating control signals according to the fractional frequency signals, the monocycle pulse signals and the clock signals and sending the control signals to the menu selector. The frequency pulse selector and selection method can change output multiple pulses and the number of the monocycle pulses of a laser without adjusting a hardware circuit, thereby avoiding signal control abnormity caused by failures of the hardware circuit.

The invention discloses a transmission control method based on differentiated service in the IEEE 802.11 WLAN, belonging to the technical field of the wireless mobile ad hoc network data stream. The data streams in the mobile ad hoc network are divided into the data stream which is sensitive to the time delay and the data stream which is not sensitive to the time delay and the two kinds of data streams are marked respectively; an MAC layer packet retransmission counter is adopted in the process of sending and forwarding nodes; the retransmission times of data packets are saved on the head of the MAC frame of the data packets which need to be sent or forwarded; a packet control mechanism is adopted at the exit of the node interface queue so that the data packets are sent and forwarded differently according to the priority of the data packets; and the sent nodes are made to double the contention window thereof or minimize the contention window according to the successful or failed sending of the data packets of the two kinds of data streams, wherein the sent nodes minimize the contention window thereof after the data packets of high priority or the data packets of low priority are retransmitted for the maximum times. The transmission control method can make the data stream of high priority occupy more bandwidth resources and can reduce the transmission time delay and the loss rate of the data packets.

The present invention relates to a data transmission method, device, computer equipment and storage medium. The method includes: acquiring target data to be transmitted; dividing the target data into k sub-data to be transmitted, where k is greater than An integer of 1; respectively establish data transmission channels with N target servers in the server set, and the N is an integer greater than 1; send a data transmission request to the corresponding target server through the data transmission channel, and in the data transmission request Carrying one or more sub-data, so that each target server stores the received sub-data on a preset storage device. The above method can improve the transmission efficiency and reduce the transmission time.