40 results about "Hop (networking)" patented technology

The invention provides a popularity-based equilibrium distribution caching method for named data networking and relates to the technical field of caching in named data networking. The method comprises the steps as follows: an intermediate node judging the distance between the intermediate node itself and a node of requested data; recording popularity for each data at each intermediate node; querying a PIT table in the node to obtain a hop count H corresponding to a data package; querying a popularity table to obtain popularity P corresponding to the data package; calculating the caching value of the data, comparing the caching value of the data with a threshold value, and finally determining whether to cache the arrived data package. The popularity-based equilibrium distribution caching method of the invention improves response speed and reduces network flow, simultaneously gives consideration to cache capacity of mobile nodes and reduces the redundancy degree of data in the network.

Networking devices and methods for forwarding information base (FIB) aggregation are provided. A networking device includes a processor operable to access entries in a FIB, and aggregate the FIB entries to produce an aggregated FIB with strong forward correctness. In aggregating the FIB entries, the processor is operable to: (a) associate the FIB entries with nodes (n) in a patricia trie; (b) traverse the patricia trie depth-first in post-order and determine for each node a next-hop set, without expanding the trie, by merging what would be the next-hop sets of its imaginary children nodes if there is a complete binary tree; and (c) traverse the patricia trie depth-first in pre-order, select for the root node a next-hop from its next-hop set and include the FIB entry associated with the root node in the aggregated FIB, for each node having a selected next-hop that appears in its child's next-hop set, select that next-hop for the child as its next-hop and exclude the FIB entry associated with the child node from the aggregated FIB, and for each child node which does not have in its next-hop set the selected next-hop of its parent, select a next-hop from its next-hop set and include the FIB entry associated with the child node in the aggregated FIB.

The invention provides a dual-mode inter-mode cooperation method and an electric Internet of Things system, and belongs to the field of electric Internet of Things wireless communication. The method comprises the steps that if a mode A of a sending node is disconnected through communication of a link A, the sending node performs inter-mode cooperation, requests a mode B of the sending node to construct a network frame and forwards the network frame through a link B, wherein the type of the network frame is an inter-mode forwarding frame; and after a receiving node receives the inter-mode forwarding frame through the mode B, inter-mode cooperation is carried out, and the inter-mode forwarding frame is sent to the mode A of the receiving node, so that the mode A of the receiving node obtains communication data. According to the method, a collaborative networking function is provided, inter-mode beacon frame and networking command frame forwarding is realized, and the network networking reliability is improved; and a single-hop service transmission path backup and a selection function is provided, data frame and command frame forwarding between single-hop modes is realized, and the network data transmission reliability is improved.

The embodiment of the invention provides a next hop determining method and device. The method is applied to a first ASBR in a first autonomous system. A first autonomous system and a second autonomous system carry out cross-domain networking in an Option B mode. The second autonomous system comprises at least two second ASBRs. The method comprises the steps of detecting whether a preselection next hop currently corresponding to a target address is reachable or not, wherein the target address is the address of a target CE in the second autonomous system, the preselection next hop is the second ASBR with target identification information in a target forwarding table, and the target forwarding table is the forwarding table which is stored by the first ASBR and corresponds to the target address; if the preselection next hop is unreachable, selecting the identification information with the highest priority except the target identification information from the target forwarding table, wherein corresponding relationships between the identification information and the priorities are stored in the target forwarding table; and updating the preselection next hop corresponding to the target address to be the second ASBR with the selected identification information. Visibly, according to the scheme, the condition that traffic is interrupted for a long time among the autonomous systems which carry out cross-domain networking in the Option B mode can be avoided well.

The embodiment of the invention provides a method for constructing a virtual-real decoupling simulation network, and the method comprises the steps: S1, obtaining a simulation network planning scriptwhich is configured in a user-defined manner and comprises a simulation network topological structure and the function information of each node in the simulation network topological structure; S2, according to the simulation network planning script, dispersing and deploying each node of the simulation network on a plurality of physical hosts connected through a physical network; and S3, constructing data plane equipment connected with all nodes on each physical host on each physical host, wherein each data plane equipment is configured in a software definition mode to perform networking on each dispersed node based on an Overlay tunnel technology to construct a logic topology so as to form a simulation network which is decoupled with the physical network and enables data frames to be transmitted hop by hop. According to the method, the construction process is completely transparent to the physical network cluster, and any virtual-real decoupling simulation network topology structure can be constructed without relying on or changing networking and configuration of the physical network cluster.

The invention relates to the field of Internet of Things, and provides an Internet-of-Things communication system and a construction method thereof. The Internet-of-Things communication system comprises a first-layer network and a second-layer network, wherein the first-layer network is a multi-hop network which is constructed by a central gateway and a cluster head node and takes the central gateway as a root node; the second-layer network is a point-to-multipoint single-hop cellular network constructed by the cluster head node and the terminal node; and the cluster head node is generated byelecting from the terminal node according to a preset rule and is used for converging and forwarding data sent by the terminal node. In the networking initialization process of the terminal nodes, thecluster head node is elected according to the preset rule, it is guaranteed that the number of multi-hop levels from the center gateway of the first-layer network to the cluster head node is as smallas possible, the end-to-end time delay is reduced, and the throughput and the network transmission efficiency of the network are improved. The second-layer network is a point-to-multipoint single-hopcellular network, so that the communication requirement of low time delay during high-frequency concurrent data transmission of a large number of terminal nodes can be met.

The invention belongs to the field of communication and specifically relates to a MAC layer transmission protocol design method with limited control overhead. The method comprises the steps of initializing to generate a DATA message, sending an RTS (Request to Send) message, receiving the RTS message, sending a CTS (Clear to Send) message, receiving the CTS message, sending the DATA message, receiving the DATA message, sending a REQ message, receiving the REQ message, sending an SRQ (Selective Automatic Repeat Request) message, receiving the SRQ message, sending an ACK (Acknowledgement) message, receiving the ACK message and so on. By monitoring a channel reservation request RTS message sent by the next hop node and the REQ message of the next second hop node, the MAC layer transmission protocol design method with limited control overhead can judge correctness of the message transmission thereof, and accordingly can adjust and modify path information in time to solve problems of circumvention of invalid relay nodes and restoration of an interrupted transmission link. Network congestion, even network paralysis, caused by invalidity of transmission links, is avoided efficiently without adding any extra control message field within the limited control overhead, robustness of message transmission links is accordingly enhanced, the network lifecycle is prolonged and the MAC layer transmission protocol design method with limited control overhead is enabled to be more applicable to wireless sensor networking demands.

The invention introduces a software defined network (SDN) technology into a low-power-consumption wide-area multi-hop network, and completes dynamic networking and flexible transmission of the networkthrough design and implementation of links such as topology discovery and maintenance, flow table generation and issuing and the like. Through control and data transmission decoupling of the network,software definition, flexibility and controllability of the network transmission process are realized, and meanwhile, the routing overhead of common sensing nodes is effectively reduced by adopting acentralized control algorithm, so that the routing success rate and the network stability are improved. The networking and transmission method provided by the invention is essentially different fromthe traditional routing-based networking method. According to the software defined network idea based on centralized control and numerical control separation, the advantages of a traditional softwaredefined network and the requirements of a wireless multi-hop network can be well met, and convenience is brought to the network management, centralized network configuration and the like of the wireless multi-hop network.

The embodiment of the invention relates to local repair for underlay failure using prefix independent convergence, and describes techniques for improving speed of network convergence after node failure. In one example, a method includes storing, by a virtual router agent of a compute node managed by a Software Defined Networking (SDN) controller, a forwarding information data structure with a shared liveness vector orthogonal to the forwarding path to indicate a liveness state of a plurality of overlay network tunnel endpoint next hops, wherein the shared liveness vector is shared by each of a plurality of members for a plurality of composite next hops that share a common list of the plurality of overlay network tunnel endpoint next hops; and in response to determining, by the virtual router agent, that the orthogonal liveness vector indicates that each of the plurality of overlay network tunnel endpoint next hops are reachable, distributing network traffic to one or more of the plurality of overlay network tunnel endpoint next hops.

The invention discloses a mobile ad hoc network communication method, device and system and a storage medium. The method comprises the following steps: receiving a networking signaling sent by an adjacent node of a receiving node; the networking signaling comprises a stable routing mark and hop count information, the stable routing mark represents a first path transmission state that the adjacent node reaches a certain appointed node in the ad hoc network, and the hop count information represents the forwarding times that the adjacent node reaches the certain appointed node in the ad hoc network; obtaining a second path transmission state from the receiving node to the specified node based on the received networking signaling; and updating the routing table of the receiving node according to the first path transmission state or the second path transmission state. According to the embodiment of the invention, the stable routing mark is introduced, during networking, each node broadcasts and transmits the own stable routing mark and constructs/updates the routing table, and the routing table of each node can obtain the most stable next-hop node which arrives at the appointed node, so that the connectivity rate between two long-distance nodes is improved.

Systems, media, and methods are capable of determining a layer 2 destination address that can then be used by a network acceleration application to populate data packets to be transmitted using accelerated networking techniques. The systems and methods provide for a software application executed on a computing device that controls a NIC interface to provide for an accelerated network. The software application resides in the application layer of a networking stack and is interfaced via a virtual NIC or TUN/TAP device with the kernel and the networking stack and operating system (OS) facilities to determine a layer 2 destination address for use in accelerated network applications. Embodiments herein, through the combination above, are able to account for firewall rules, static ARP entries, or any other system-administrator rules put in place for network operations.

The invention discloses a wired Mesh network test method. The method comprises the following steps: designing a wired Mesh network virtual equipment framework; designing a wired Mesh network virtual port framework; designing virtual connection of the wired Mesh network; designing a virtual concurrent hop of the wired Mesh network; and designing a command line interaction interface. According to the invention, the concepts of the equipment and the port are separated, and the binding relationship between the equipment and the port in the traditional physical concept is broken, so that a very complex networking scene can be realized by using very simple codes. Meanwhile, the complexity of concurrent programming is avoided through a virtual one-hop design concept, a synchronous one-hop mode can simulate wired Mesh networking with a synchronization function, and an asynchronous one-hop mode can also cover most of function verification scenes. The whole test framework is very simple, easy to develop, maintain and expand, and capable of effectively assisting development and testing personnel to carry out related work, shortening the project period and improving the product quality.