200results about How to "Improve transmission success rate" patented technology

The invention discloses a tree structure-based data aggregation method with reliability assurance. The aggregation method comprises the following steps: generating a tree creating module, an in-tree data aggregation module and a data detection module, and generating a tree revising module. The aggregation method adopts the tree structure to realize fast aggregation of data in the network, ensure that data can be conveniently found and used in the entire network, reduce the communications of the network in the data aggregation process and prolong the service life of the entire network; and the data detection method and the method of generating tree revise are both adopted and the phenomenons such as the damage and death of node can be monitored and found, thus increasing the accuracy and effectiveness of data transmission in the network and the reliability of the entire network.

The invention discloses a noncooperative-game-based DTN opportunistic routing cooperative encouragement method. In the method, intermediate nodes are encouraged by means of source node payment to cooperate to forward data in DTN, an auction model of the contracting process at each hop of each node is built, and with data time to live (TTL), node energy level and node memory conditions taken into consideration when a candidate node offer a price, Byes Nash equilibrium solution is found so as to maximize the payoff of each node under the equilibrium solution condition. The mechanism can maximize the transmission rate of data, reduce data transmission delay and improve network stability to a certain extent.

Disclosed are an information transmission method, a base station, a user equipment and a communication system, which can improve the transmission success rate of system information, thereby guaranteeing the realization of an MBMS. The method comprises: receiving system information sent by a base station on a designated time-frequency resource, the system information comprising an MBMS area identifier and time-frequency resource information about an MCCH corresponding to the area identifier; according to the MBMS area identifier and the time-frequency resource information about the MCCH corresponding to the area identifier, determining a time-frequency resource used for transmitting the MCCH corresponding to the area identifier; and according to the time-frequency resource used for transmitting the MCCH corresponding to the area identifier, receiving the MCCH corresponding to the area identifier. By means of the method in the embodiments of the present invention, the system information is directly carried in a time-frequency resource, and since the time-frequency resource can be transmitted through more channels, the transmission success rate of the system information can be improved, thereby guaranteeing that a UE normally receives an MBMS.

The invention belongs to the technical field of air-ground integrated Internet of Vehicles communication. The invention discloses an air-ground integrated Internet of Vehicles information transmissionmethod based on fog computing and intelligent traffic. The information transmission method based on fog computing is adopted for the problems existing in the prior art. An information transmission problem is formalized into a multi-objective optimization problem related to a link transmission rate, a link switching frequency and a network copy number; the number of times of link switching and thelink transmission rate are optimized in a combined manner; the number of network copies is optimized on the premise of ensuring the link reliability; transmission is carried out in a storage-carrying-forwarding opportunity transmission mode, and the unmanned aerial vehicle and the parking vehicle group are used as fog nodes to assist network communication, so that the network transmission successrate can be effectively improved, and the routing overhead, the transmission time delay and the link switching frequency are reduced. Compared with an existing mechanism, the information transmissionsuccess rate can be effectively improved, and the transmission delay, the routing overhead and the link switching frequency are reduced.

The invention discloses an opportunistic network routing method based on spectral clustering community division. The method comprises the following steps of setting the number of network node communities, division classes and the number of nodes and starting carrying out random movement by all nodes; after simulation is carried out for certain period of time, carrying out community division on the nodes in the network through utilization of a spectral clustering algorithm according to contact times and contact duration among the nodes; calculating community reachable probability centrality of a target node, intra-community node reachable probability centrality and a message copy control utility value according to community division results; carrying out movement and encounter by the nodes, and determining whether messages are forwarded or deleted according to the reachable probability centrality and the copy control utility; and periodically updating the community reachable probability centrality, the intra-community node reachable probability centrality and the message copy control utility value. According to the method, through adoption of the spectral clustering algorithm, the community division effect is good, the message transmission is clearly improved, and the network cost is reduced.

The invention discloses an HTTP (hyper text transport protocol)-based large file page breakpoint resuming method and an HTTP-based large file page breakpoint resuming system. The system comprises a web browser, a file index server, a file transfer storage server and a large file uploading plug-in, wherein the web browser is based on an HTTP and is taken as a carrier of the large file uploading plug-in; the file index server is used for storing the transfer index value of a file to be uploaded; the file transfer storage server is used for storing the successfully uploaded file block information of the file to be uploaded; the large file uploading plug-in is used for sending an HTTP request into the file index server and inquiring whether the file with the transfer index value is stored in the file transfer storage server or not; the successfully uploaded file block information is acquired from the file transfer storage server; the uploading thread is acquired and established. The method and the system mainly solve the problem of large file uploading performance of the web browser, the progress and the speed of file uploading can be displayed in a friendly interface in real time, and suspension, cancel and recovery of multiple uploading tasks can be conveniently and rapidly controlled.

The invention discloses a control method for processing network packet loss. The method comprises the following steps: a transmitting end generates a data packet to be transmitted, wherein each data packet has a unique serial number, and the data packet is classified into a video packet and an audio packet which are used for packaging a video frame and an audio frame; the frame priority of the video frame or the audio frame is set, and a first time threshold and a second time threshold are determined according to the frame priority; the transmitting end transmits the data packet to the receiving end and starts timing; if the transmitting end does not receive the confirmation information of the receiving end on a certain data packet in the time period greater than the first time threshold and smaller than the second time threshold, the transmitting end retransmits the data packet; and if the transmitting end does not receive the confirmation information of the receiving end on the data packet in the time period greater than the second time threshold, the transmitting end discards the data packet. According to the control method, the transmission success rate of a key data packet can be improved, and the data transmission efficiency requirement and the data transmission real-time property requirement can be met.

The invention relates to an IPv6 wireless sensor network multipath transmission method based on an RPL routing protocol and belongs to the technical field of a wireless sensor network. According to the method, in a 6LoWPAN wireless sensor network based on an IPv6 technology, through utilization of the RPL protocol, a father node set generated when routing is carried out is established according to a hop count value from a source node to a sink node and node residual energy, a message is copied to obtain multiple copies according to a reliability demand of a message and a Rank value of the father nodes, and the message copies are distributed to a plurality of RPL father nodes for forwarding. According to the method, in order to enable the 6LoWPAN wireless sensor network to support multipath message transmission, a new 6LoWPAN head--a multipath head is designed in an adaption layer, and the multipath head is used for copying the message to multipath transmission and finally eliminating the message. According to the method, through increase of redundant paths when the message is transmitted, the message transmission reliability in the network can be improved; and when transmission paths are selected, the node residual energy and the hop count from the source node to the sink node are taken into consideration, so the life time of the network can be effectively prolonged.

The invention provides a network node selection method and device, and an SMF network element obtains transmission capability information of access network equipment, and selects a UPF network elementsupporting at least one transmission capability contained in the transmission capability information for terminal equipment according to the transmission capability information of the access networkequipment. In this process, the SMF network element selects the UPF network element according to the transmission capability of the access network equipment by acquiring the transmission capability ofthe access network equipment, and the selected UPF network element supports the transmission capability adopted by the access network equipment, so that data can be successfully transmitted between the access network equipment and the UPF network element, and the success rate of data transmission is improved.

The invention belongs to the technical field of air-ground integrated Internet of Vehicles communication, and discloses an air-ground integrated Internet of Vehicles relay selection method based on state transition probability. The method comprises the steps of constructing an air-ground integrated Internet of Vehicles model composed of V vehicle nodes and U unmanned aerial vehicle nodes; constructing an information transmission mechanism between the mobile nodes based on the air-ground integrated Internet of Vehicles model; constructing a state transition probability between the mobile nodesbased on the information transmission mechanism between the mobile nodes; based on the state transition probability between the mobile nodes, constructing an information identification method based ona multiple-input-multiple-output technology; and constructing a relay selection method based on the state transition probability on the basis of the information transmission mechanism between the mobile nodes, the state transition probability and the information identification method. The method can be applied to an urban intelligent traffic system, the relation among vehicles, unmanned aerial vehicles and users is enhanced, and a real-time, accurate and efficient comprehensive transportation and information transmission system is built.

The invention discloses a low-power-consumption distributed medium access control method based on TDMA. The method mainly solves the problem that the energy consumption in the existing mobile ad hoc network is too high, and the implementation scheme is realized according to the scheduling of time slots and the statistical comparison of transmission data volume: when no node accesses the network, only one available network access time slot is reserved for monitoring, and when the node accesses the network, the number of available network access time slots is increased for monitoring; When the time slots of the nodes are remained, the remaining time slots of the nodes are distributed according to the actual time slot requirements of the adjacent nodes, and the next time slot distribution result is dynamically adjusted; When the data transmission quantity of the node in a period of time is lower than a set threshold value, the frequency of periodic starting of the node is reduced by increasing the period length, and the dormancy period is prolonged. According to the method, the power consumption during network operation is reduced, the residual time slots of the nodes can be accurately distributed according to the requirements of the adjacent nodes, and the method can be used for a small-scale low-flow mobile communication network.

The invention discloses a data scheduling method based on vehicle collaboration in an urban scene. The method implements data scheduling of vehicle collaboration through data information transmission between a vehicle and a roadside unit. The method comprises the following steps: a vehicle node periodically broadcasts a message; the roadside unit receives the broadcast message; request data is scheduled on the basis of speed prediction; data is transmitted between a request vehicle and a collaborative vehicle; and the scheduling data is cleaned. The method implements dissemination scheduling of the request data in a vehicle network in the urban scene, and reduces the network overhead.

The invention provides a service traffic transmission method and apparatus, and relates to the field of communications. The service traffic transmission method and apparatus can reduce the data packetloss rate and improve the transmission reliability in a FlexE (Flexible Ethernet) technology. The method comprises the following steps: a network device determines a magnitude of a service traffic; and if the magnitude of the service traffic is greater than a threshold value, the network device transmits the service traffic via a shared channel and a pre-configured rigid channel of the service traffic, wherein the shared channel is configured to transmit at least one part of traffic in the service traffic and other service traffic, and the other service traffic is a service traffic except forthe service traffic.

The invention relates to a data transmission method for an opportunistic mobile sensor network based on closeness centrality. An opportunistic mobile sensor network consisting of a plurality of sink nodes and sparsely distributed sensor nodes is taken as an application scene, wherein the sensor nodes are used for periodically collecting data during movement, the same time period is set for each sensor node, the interval time when each sensor node meets the sink nodes at the previous time and within the current time period is recorded, then the expected transmission delay and the closeness centrality for each sensor node are calculated, and the data transmission is determined by judging the closeness centrality when the sensor node meets the sink nodes. By adopting the method, the success ratio of data transmission is improved, and the transmission delay is remarkably shortened.

The embodiment of the invention provides a CSI information reporting method, a CSI information receiving method, and a communication device for providing a scheme for mapping CSI information to an uplink channel and transmitting the CSI information for a terminal in an NR system. The method comprises the following steps: receiving, by the terminal, uplink channel resource configuration signaling and/or DMRS configuration signaling sent by a base station, and determining a mapping symbol set, wherein the DMRS configuration signaling is used for indicating the number of DMRSs configured by thesystem to an uplink channel and a time-frequency position of an occupied OFDM symbol, the uplink channel resource configuration signaling characterizes a time-frequency resource of the uplink channel,the mapping symbol set is a set of OFDM symbols adjacent to an OFDM symbol; and measuring, by the terminal, a downlink channel, calculating channel state information CSI, encoding the CSI information, and mapping an information part comprising rank indication RI information to an RE of at least one OFDM symbol in the mapping symbol set for transmission.

The invention relates to a method and device for adjusting a multicast physical sending rate. The method comprises the following steps that a plurality of multicast physical sending rates and a plurality of multicast packet loss probability threshold value intervals are configured in advance; statistical information of all target terminals of the same multicast stream for receiving the multicast stream during the first preset time is obtained, and the packet loss probability from the multicast stream to at least two target terminals is obtained according to the obtained statistical information of the at least two target terminals; the multicast physical sending rate of the multicast stream is adjusted according to the multicast packet loss probability threshold value interval of the obtained maximum packet loss probability and the pre-configured multicast physical sending rates, and the multicast stream is sent according to the adjusted multicast physical sending rate within the second preset time. According to the adjusting mode of the multicast physical sending rate, the transmission success rate of the multicast stream can be improved.

The invention discloses a low power consumption communication method of a low-bitrate wireless sensor network suitable for data collection. The method redesigns a media access control layer and a network layer of the low-bitrate wireless sensor network suitable for the data collection to obtain a mixed layer model with two layers, the time length of a cycle needing time synchronization is calculated, a work cycle of the low-bitrate wireless sensor network suitable for the data collection is designed, confirmation methods or calculation methods of all parameters in the cycle are displayed, time for monitoring a communication channel and sending data in the work cycle is decreased to the minimum, and power consumption of the wireless sensor network is greatly reduced. Data transmission of mixed layers and data transmission successful rate of the mixed layers are enabled to be connected, and the data transmission successful rate is monitored in real-time. Meanwhile, all functional modules of the mixed layers are designed and achieved on a standard platform Telosb of the wireless sensor network.

The invention discloses a transmission control method and a transmission control device of buffer state report (BSR), wherein the method and device are used for adjusting physical resources which transmit BSR to increase transmission chances of the BSR, so that the transmission success rate of the BSR is improved. The transmission control method of BSR comprises the steps of: distributing a physical uplink shared channel (PUSCH) resource for a terminal when a schedule requirement (SR) transmitted by the terminal is received, and sending a UL-GRANT which carries a PUSCH resource indication distributed for the terminal to the terminal; detecting a decoding result of BSR transmitted by the terminal via the PUSCH resource; judging whether the sending of the UL-GRANT is continued or not, and adjusting PUSCH resource positions distributed for the terminal.

The invention provides a resource distribution method and device. A social track similarity in positive correlation with duration time of a D2D communication link is used to correct a throughput gain value pre-estimated by a D2D pair, so that the throughput gain value pre-estimated by each D2D pair is more accurate, and further, a resource distribution strategy determined by the more accurate throughput gain value is more reasonable; and when utility values of all the D2D pairs are equivalent, resources are distributed to all the D2D pairs according to the resource distribution strategies selected for each D2D pair at present, the fairness of all the D2D links can be improved greatly, and all the D2D pairs are more probable to realize successful transmission. Thus, the resource distribution method and device can improve the transmission success rate of each round of content distribution, reduce the frequency that the content is distributed to the whole network, and reduce transmission delay when the content is distributed to the whole network.

The invention discloses a D2D information propagation modeling method based on user attributes and content attributes, belonging to the mobile communication field. The method comprises the following steps: 1, according to user history interaction, combining interaction factor and stability factor to quantify the social relationship among users; 2, establishing a user infection probability functionaccording to that social relations among users and the degree of interest of the us in the information content; 3, using the degree of user and neighbor user to represent user influence, and introducing the influence attenuation model to establish the user recovery probability function; 4, in combination with the SIR model, determining the D2D information propagation model base on the discrete-time Markov chain; 5, carrying out stability analysis of information propagation model based on user attributes and content attributes. The D2D information propagation model proposed by the invention can effectively improve the information propagation range and has higher matching degree with the actual network.