30results about How to "Improve the success rate of forwarding" patented technology

The invention discloses a method for reducing the duration of the wrong GR state, which includes: when the router detects that the neighbor relationship with the neighbor router is broken and does not restart itself, enter the GR state, receive the neighbor relationship establishment message sent by the neighbor router, If it is detected that the message does not indicate that the neighbor router restarts, it exits the GR state; the invention discloses the router at the same time, including: a neighbor relationship detection module, a restart detection module, a relationship message receiving and processing module and a GR module. The present invention can detect in time when entering the GR state by mistake, reduces unnecessary signaling and data interaction, and reduces CPU resource occupation; and enables newly generated routes to be allocated to LSPs in time, improving the success rate of data forwarding .

The invention provides a data routing method and a sensor node. The method comprises the following steps: establishing a plurality of routes to a sink node; receiving a negative feedback command sent from at least one next-hop node on the plurality of routes, wherein the negative feedback command comprises the value of the parameter level of the at least one next-hop node; calculating the forwarding probability of a plurality of next-hop nodes on the plurality of routes according to the values of the parameter levels of the plurality of next-hop nodes on the plurality of routes, wherein the values of the parameter levels of the plurality of next-hop nodes comprise the value of the parameter level of the at least one next-hop node and the stored values of the parameter levels of the other next-hop nodes in the plurality of routes; and selecting the next-hop node according to the calculated forwarding probability of the plurality of next-hop nodes on the plurality of routes, and sending the data to the selected next-hop node. The sensor node provided by the invention comprises an establishing module, an interface module, a calculating module and a routing module. The invention can ensure the data transmission.

The invention relates to a wireless delay-tolerant network routing method based on a multi-layer network, belongs to the technical field of computer networks, and is based on the following principles: a single-copy routing strategy, and each message has a TTL field that identifies its time-to-live. As time goes by, the message will be discarded when it decreases to zero; it includes the following content: First, according to the node's historical encounter records, historical communication records, online social platform friend list, interest set data, etc. Create a multi-layer social graph based on information; then extract social attributes according to the multi-layer social graph; then calculate corresponding social indicators according to social attributes; finally determine whether to forward data packets according to social indicators. Compared with the prior art, the present invention effectively improves the success rate of DTN network message forwarding, and is suitable for application in a network environment that has a certain tolerance for transmission time delay but requires a higher success rate of message forwarding.

The invention relates to a topology construction and internet access method for an aviation ad-hoc network. In the method, a flight process is divided into five stages including a dormancy stage, a waiting stage, a take-off stage, a cruising stage and a landing stage; a corresponding topology construction and data transmission strategy is provided for a flight node in a specific flight stage, wherein a waiting node is used as a connection point between an ad-hoc network in the air and a ground network, passively accepts network access requests of other nodes, and is mainly responsible for data relay; on one hand, a take-off node rapidly establishes a link information table; on the other hand, the take-off node accepts a request of the waiting node, carries data of the ground network, and rapidly diffuses data of the ground network in the ad-hoc network in the air; a cruising node regularly updates the link information table, and selects the optimal and backup link to perform data exchange in the air according to a link distance and the link duration; and a landing node rapidly forwards the data of the network in the air to the waiting node, and finally forwards the data into the ground network. By means of the topology construction and internet access method for the aviation ad-hoc network disclosed by the invention, fully connected topology can be rapidly formed; and communication between the aviation ad-hoc network and the ground network is realized.

The invention belongs to the communication technology field and especially relates to an opportunity network data distribution method based on a centrality degree and an opportunity network system. The opportunity network data distribution method based on the centrality degree comprises the following steps of stepS1) calculating a centrality degree of a node and a data transmission probability; stepS2) generating new data and a forwarding token of the data by a source node, for the node whose the forwarding token number is not 1, according to the data transmission probability and a future meeting probability of the node and a destination node, carrying out half division processing till that the forwarding token is 1 or the data is successfully forwarded to the destination node. By using the opportunity network data distribution method based on the centrality degree, under the condition that a transcript is not added, a data forwarding success rate is increased and data forwarding time delay is reduced.

The present application provides a method and device for generating a forwarding table entry of a software-defined network (SDN), and a message forwarding method. Among them, the SDN controller generates ingress and intermediate flow entries based on the packet characteristic information of the service flow, each forwarding path and its maximum flow rate; generates an egress flow entry based on the packet characteristic information of the service flow and the forwarding port. The ingress node sends the packet carrying the traffic rate identifier on the selected path according to the ingress flow entry matched with the flow rate of the service flow and the packet characteristic information. The intermediate node on the selected path continues to send the message carrying the flow rate identifier on the selected path according to the message feature information of the message and the intermediate flow entry matched by the flow rate identifier. The egress node sends the packet with the traffic rate identifier removed according to the egress flow entry matched by the packet feature information of the service flow. Therefore, in the SDN network, according to the traffic rate of each forwarding path of the service flow, a flow entry is generated to select and forward the flow rate of the service flow.

The invention is applicable to the field of network technology improvement, and provides a multi-mode identification network addressing method based on coordinate mapping, including: S1. By assigning three-dimensional spherical coordinates to each node in the network, The modular identification network is mapped into a three-dimensional hyperbolic space; S2, the sender of the message attaches the node coordinates of its destination to each segment of the message; S3, the routing node calculates the destination and each segment when forwarding the message. The hyperbolic distance between adjacent nodes, and the smallest one is selected as the forwarding object. The algorithm relies on less global information, and the calculation is simple, which is easy to complete locally, thereby improving the adaptability to large-scale networks.

This invention discloses a data transmission method including: a network transmission device receives a message and finds out item ID and its address information corresponding to the flow ID of said message and finds out the list according to the address information, when the ID found out according to the flow ID and that based on the address information are the same, it transmits the message based on the content in the item in terms of the address information. This invention discloses a data transmission device including: a host item set-up module, a residual item set-up module and a message transmission module.

The embodiment of the present invention discloses a method and device for generating a routing table of a digital receiving device, which relates to the field of data processing, and is used to prevent data packet forwarding from selecting a wrong path due to the existence of multiple default routes, thereby resulting in data forwarding Packet error or packet loss. In the embodiment of the present invention, N routing tables configured for the digital receiving device by N servers connected to the digital receiving device are obtained; one of the N default routes in the obtained N routing tables is used as a local default route. Save; and set the corresponding network segments obtained as the target network addresses of N-1 default routes, and convert the remaining N-1 default routes into static routes; according to the obtained N servers configured for the digital receiving device N Several routes in a routing table, as well as the obtained local default route and static route, generate a local routing table; thus solving the above problem.

The invention belongs to the field of delay tolerant network (DTN), and in particular relates to a delay tolerant network node cache management method facing to epidemic and probabilistic mixed routing. The present invention comprises: at first judging whether the node in the network has message to send; If yes, execute step (2); Otherwise, execute step (8); traverse the neighbor nodes of the node that has message to send; If the number of neighbor nodes L If it is equal to 1, execute (4); otherwise, execute (5) and so on. The invention combines the characteristics of the epidemic routing method and the probabilistic routing method, effectively controls the number of copies of the same message in the network, and reduces the time delay from the message to the destination node compared with the probabilistic routing method.

The invention discloses a method for selecting a content forwarding node in a vehicle-mounted ad hoc network based on a service type, comprising the following steps: according to the type of content information requested and the bandwidth occupancy of neighboring vehicles that can be forwarded within a one-hop transmission range, calculate Bandwidth occupancy scale factor; according to the distance between the neighbor vehicle and the initial request vehicle and the speed of the neighbor vehicle, define the virtual arrival time from the candidate forwarding vehicle to the initial request vehicle; calculate the forwarding node impact factor according to the bandwidth occupation scale factor and the virtual arrival time ; Select the forwarding node according to the forwarding node influence factor. The present invention selects the forwarding node according to the bandwidth occupation situation and the moving speed of the node position, which can effectively avoid the network time delay caused by the network topology change, improve the success rate of content information forwarding, thereby effectively improving the success rate of content data packet arrival, Reduce transmission delay and improve network performance.

The invention relates to a method for realizing vehicle-mounted mobile self-organized network routing, which is characterized by comprising the following steps that: (1) a static node is arranged at each intersection; (2) when forwarding a data packet, a source node can forward the data packet to the static node relatively close to a target static node at one end of a road section where the source node is positioned; (3) when forwarding the data packet, the static node firstly judges whether the static node closer to the target static node is in a neighbouring list or not, if so, the static node directly forwards the data packet to the corresponding static node, otherwise, the static node selects a neighbouring road section according to a road section selection algorithm, and then appoints another static node on the selected road section as the static node of a road section receiving terminal, wherein the neighbouring road section is not the road section which just receives the data packet; and the road section direction of the neighbouring road section is close to the target static node; and (4) when receiving the same data packet transmitted from the same source node from different road sections, a routing static node selects an optimal route which is high in the success rate for receiving the data packet and relatively short in delay time, and forbids the receiving routes which are not optimal at the same time.

The invention discloses a dual-mode interest tag forwarding system and method based on fog computing for social networking of vehicles. The invention adopts a forwarding strategy of dual-mode interest tags. Compared with the traditional scheme, the influence of external factors on the selection of forwarding vehicle nodes based on personal interest is reduced; when the message is V2R forwarded, the interest tag of RSU is obtained through fog computing, The interest ranking of each interest is calculated according to the interest label, and finally according to the interest ranking, several RSUs are selected to forward the message, which improves the forwarding efficiency between RSU and RSU, and also ensures the correct delivery rate of the message. Moreover, the present invention adopts the forwarding strategy of the dual-mode interest tag, which reduces the network congestion caused by the message being only transmitted between vehicles to a certain extent, improves the adaptability to the dynamic environment, and can provide more stable communication.