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

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 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.

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 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.