36results about How to "Improve the success rate of data transmission" patented technology

The invention discloses a wireless relay system and the data transmission method thereof, which belong to the filed of wireless communication. The method of the invention includes the steps: first, a media access control layer (MAC) entity of a wireless relay station receives an MAC protocol data unit to be sent to a user terminal or a base station for the base station or the user terminal; then the MAC entity of the wireless relay station defines the length of the MAC protocol data unit which can be sent at present, analyzes the MAC protocol data unit which cannot be transmitted to the destination user terminal or the base station once and takes out the MAC protocol data unit to cache; finally, when the MAC entity of the wireless relay station sends the cached data, one or a plurality of MAC service data unit(s) is/are taken out to compose the MAC protocol data unit which conforms to the length requirement, and then the MAC protocol data unit is sent to the MAC entity of the destination user terminal or the base station. The invention also provides the wireless relay system, improves the success ratio for data transmission between BS and UT and the utilization ratio of wireless resources.

The invention relates to a multi-path transmission mechanism of a wireless multimedia sensor network and a congestion control method thereof. Based on intensively distributed wireless sensor network nodes and wireless multimedia sensor network nodes, the method aims to improve the quality and reliability of sensor data transmission by establishing a plurality of sensor data transmission paths between a source node and a target node through a relay node to ensure the in-time, accurate and reliable arrival of multimedia sensor data and common sensor data at the target node. Meanwhile, for improving the utilization rate of network resources, the invention provides a method for finding, reporting and regulating congestion in the relay node and the path of the relay node to further ensure the reliability of data transmission.

The invention relates to a method and a system for forwarding network data by a wireless sensor. The method comprises the following steps that: 1, a destination node sends information on own geographical position, and a common node sends information on own geographical position and residual energy; 2, the common node receives the information on the geographical position of the destination node andthe information on the geographical positions and the residual energy of neighbor nodes; 3, the common node selects the neighbor nodes which are closer to the destination node as predecessor neighbornodes according to the information on the geographical positions of the destination node and the neighbor node; 4, the common node estimates the total transmission times to reach the destination nodeby using each one of the predecessor neighbor nodes as the next hop; and 5, the common node compares the total transmission times with the residual energy of the each one of the predecessor neighbornodes, and selects the next hop common node of a route reaching the destination node from the predecessor neighbor nodes. The method and the system can perform load balancing and improve the energy service efficiency while ensuring reliable data transmission.

The invention discloses a route recovery method and a recovery protocol for a mobile Sink wireless sensor network. The method and the protocol are characterized in that: when the location of a mobile Sink is changed to disconnect a path of the mobile Sink wireless sensor network, current information may be collected to update a route map, and path coding is performed; an optimal alternative path is selected by adopting an immune orthogonal learning particle swarm optimization algorithm to perform route recovery; and a network system is maintained by adopting the protocol based on the immune orthogonal learning particle swarm optimization algorithm. The immune orthogonal learning particle swarm optimization algorithm has the characteristics of relatively higher global searching capability, relatively higher solution accuracy, high rate of convergence and the like. By the method and the protocol, the route maintenance capability of the mobile Sink wireless sensor networks is improved, the maximum transmission success rate is realized by utilizing the shortest transmission path, network throughput is improved, and the time to live of the network is prolonged.

The invention discloses a data transmission method in a mobile social network based on swarm intelligence. The method comprises the following steps of A, using a modeling method to analyze a data distribution problem in the mobile social network to summarize a general model of the mobile social network; B, using an ant colony optimization-based mobile social network (ACOMSNet) algorithm by using high efficiency of an ant colony optimization algorithm for processing an optimization problem on the basis of the summarized general model of the mobile social network; C, aiming at the defect that the ACOMSNet algorithm is prone to trap in local optimum, fusing a particle swarm optimization algorithm with the ACOMSNet algorithm to acquire the improved ACOMSNet algorithm; and D, aiming at a selfish node in the network, using an incentive mechanism algorithm applicable to the mobile social network based on a reputation value of the node. According to the method of the invention, routing is optimized by using a thought of ant colony optimization and particle swarm optimization in a swarm intelligence theory, and thus the mobile social network can have a higher data transmission success rate and a lower time delay.

The invention discloses a method for upgrading equipment in a mesh network. The method includes the following steps: S1, taking a father node of a node to be upgraded as an initial query node, and receiving an upgrade request sent by the node to be upgraded and firmware information required for the upgrade; S2, when the query node includes upgrade firmware, enabling the node to be upgraded to obtain the upgrade firmware from the query node; S3, when the query node does not include the upgrade firmware, enabling the query node to query the firmware information of a child node in a mesh sub-network of the query node; and S4, when the query node finds the child node including the upgrade firmware in the mesh sub-network of the query node, acquiring the upgrade firmware from the child node; and when the query node cannot find the child node including the upgrade firmware in the mesh sub-network of the query node, enabling the query node to send the upgrade request and the firmware information required for the upgrade to the father node, and circularly performing the step S2. According to the scheme of the invention, the new firmware can be obtained nearby, and once the network scale becomes larger, the depth becomes deeper, the effect becomes more obvious, and the network upgrade time can be greatly saved.

The invention relates to a data transmission method under an opportunity network. The method comprises the steps of according to historical interaction data of users, calculating to obtain social relations and activenesses of the users, and selecting a user with comparatively high activeness from familiar users as an agent for data transmission, so that not only is data transmission efficiency guaranteed, but also a comparatively high data transmission success rate is guaranteed. The data transmission method has the advantages and positive effects of effectively improving information transmission efficiency and success rate by selecting the user with comparatively high familiarity and activeness as an agent according to interaction histories of users,. In comparison with an algorithm based on a flooding strategy, the data transmission method is low in consumption, and is capable of effectively saving resource and energy. The method still has a comparatively high efficiency even for an unknown target and can better realize data distribution as well.

The invention proposes an infusion pump network of LoRa transmission. The network consists of a plurality of LoRa infusion pumps and a plurality of LoRa gateways, drug administration information is transmitted by using an elastic method in the LoRa transmission of a pump head, and differential priority reporting is performed on three states, namely non drug administration, normal drug administration and clinical drug administration, so that the bandwidth utilization rate of the LoRa network is effectively improved. An MAC layer of LoRa transmission of the pump head adopts a frequency hopping communication method: configuring a plurality of radio frequency channels the same as those on the LoRa gateway to a LoRa module; before the pump head reports data, randomly selecting the configured channel, monitoring the RSSI signal strength of an air interface, and if the RSSI is less than a threshold value, directly reporting the data; if the RSSI exceeds the threshold value, deeming that the channel is busy, randomly selecting a rest channel, and monitoring the RSSI signal strength of the air interface; and so on, if all channels are busy, performing delayed backoff through a CSMA algorithm, performing the monitoring after the backoff, and reporting the data until an idle channel is monitored, and if the backoff exceeds the maximum count, discarding the data. In this way, the high concurrent communication of the wireless LoRa infusion pump network is achieved, and the data transmission success rate of the LoRa infusion pump is greatly improved.

The invention relates to a circuit for linearly adjusting power of a solar street lamp. The circuit comprises a single chip microcomputer and a power source supplying electricity to the single chip microcomputer. A solar panel power source detection module, a charging control circuit, a power adjusting circuit and a storage battery voltage detection circuit are connected to the single chip microcomputer. The circuit for linearly adjusting the power of the solar street lamp further comprises a solar panel and a storage battery, the solar panel power source detection module is connected to the solar panel and can detect voltage of the solar panel and feed back a signal to the single chip microcomputer, and the solar panel is connected to the charging control circuit which is connected to and charges the storage battery. The detection end of the storage battery voltage detection circuit is connected to the storage battery, achieves electric quantity detection of the storage battery and feeds back a signal to the single chip microcomputer, the power source output end of the storage battery is connected to the power adjusting circuit, and the output end of the power adjusting circuit is connected to an LED lamp and supplies the electricity to the LED lamp. By means of the circuit for linearly adjusting the power of the solar street lamp, the output power of the street lamp can be intelligently adjusted according to the actual weather condition and the electric quantity change of the storage battery.

The invention provides a data sending method and device, a data receiving method and device, a terminal and a storage medium, and relates to the field of communication. The method comprises the following steps: acquiring a transmission parameter set; receiving downlink control information, wherein the downlink control information comprises an information field; determining a target repeated transmission frequency n according to the transmission parameter set and the information field, wherein n is a positive integer; and performing data transmission in a target transmission resource accordingto a target transmission mode and the target repeated transmission frequency n. In the method for acquiring the transmission parameter set and the information field in the downlink control informationand thus determining the repeated transmission frequency in an authorization-free scheduling terminal, the repeated transmission frequency is reasonable, the problem that the repeated transmission frequency of low-power-consumption wide area equipment is unreasonable due to the fact that the reasonable transmission frequency cannot be determined is avoided, and the data transmission success rateof the low-power-consumption wide area equipment is increased.

The present invention provides a data transmission method and device, a storage medium and a terminal, the method comprising: determining whether remaining time residing in a current cell is greater than a preset threshold, the preset threshold being used for characterizing the minimum time required to complete minimum data transmission; and when the judgment result shows that the remaining time is greater than the preset threshold, transmitting the data. Through the scheme of the invention, the data transmission success rate can be effectively improved, and the probability of completing one communication task is improved.

An automatic frequency hopping method is provided for use with a wireless device. The wireless device could transmit data in two or more communication frequency bands. According to the counts of successful data transmission in respective communication frequency bands, the reasons of communication failure are analyzed. According to the reasons of communication failure, the automatic frequency hopping method discriminates whether a frequency hopping procedure is performed. Since the frequency hopping procedure is performed when a proper frequency hopping condition is satisfied, the automatic frequency hopping method could achieve the power-saving purpose and avoid the wireless communication interference with other wireless devices.

The invention provides a weak trusted node coexistence mechanism based on the trust model of a reporting mechanism and a Markov prediction method. The mechanism is based on a general trust model, thereporting mechanism is introduced, the trust values of the nodes are reported and node trust degrees are formed. According to a trust degree threshold, trusted nodes and untrusted nodes are eliminated, and then weak trusted nodes are screened. For the weak trusted nodes, a Markov prediction model is used to predict a behavior trend so as to form a node coexistence degree. Whether the nodes can coexist is determined and the nodes participate in routing transmission so as to increase the communication flow of a network.

The invention discloses a mobile Sink data collection method based on an energy balance tree, which aims to construct a network-wide data collection tree with minimum cost, and on this basis, dividesthe tree into several data collection sub-trees with similar scales and small energy consumption differences, and regards the sub-tree root as a traversal node. At the same time, the roles of the partial traversal node and the relay node are adjusted for further reduce the communication energy consumption and delay. The method provided by the invention shows obvious advantages in terms of the length of the moving path, the success rate of data transmission, the lifetime of the network, etc., and improves the working efficiency of the whole network.