133results about How to "Avoid broadcast storms" patented technology

The invention provides a method for detecting faults in an Ethernet Ring. The Ethernet Ring comprises a main node which forms an annular structure and one or a plurality of transmission nodes. The method includes the following processes: the main node sends a health detection message from a main port and an secondary port bi-directionally to detect the faults in a link; after detecting the faults exist in the link, the main port sends a protocol message bi-directionally to each transmission node from the main port and the secondary port and locates the faults according to the response of the transmission node. In addition, the invention also provides a system for detecting the faults in the Ethernet Ring and a main node thereof. The invention can avoid the generation of broadcast storm and realize the fault location.

The invention discloses a method and a system for implementing a cloud computing distributed network based on OpenFlow. The method comprises the following steps that a cloud computing network platform sends a message notification to a virtual switch and / or an OpenFlow switch; when the virtual switch on a computing node or a network node receives the message notification, the virtual switch issues flow tables used for indicating input and output of traffic of a virtual machine; and when the OpenFlow switch receives the message notification, according to configuration data, issuing the following seven flow tables including a flow table used for processing a broadcast message, a flow table used for recognizing the network, a flow table used for generating two-layer forwarding information, a flow table used for filtering of a security group, a flow table used for generating three-layer distributed forwarding information, a flow table used for filtering of a firewall and a flow table used for forwarding.

The invention discloses a multi-link transparent interconnection multicast frame transmission method and system, which recognizes the topology of the TRILL network through the link state protocol and generates a distribution tree; according to the received multicast listening protocol message and the route of the RB The forwarding table information generates a multicast TRILL forwarding table; when the RB receives a VLAN broadcast frame or multicast frame, the RB encapsulates the data frame as a TRILL data frame and sends it to the TRILL network; when a fault is detected, the channel status is changed to allow the TRILL data Packet smooth switching and forwarding. Adopting the technical solution of the present invention effectively guarantees the transmission of multicast messages in the TRILL network, fully utilizes the bandwidth and effectively prevents broadcast storms, well supports the rapidly increasing horizontal traffic between servers, and ensures the smooth expansion of the two-layer network , effective hierarchical MAC address, providing guarantee for virtualized data center business expansion.

The invention relates to the technical field of intelligent televisions, and provides a friend information sharing method and system based on an intelligent television. The friend information sharing method comprises the steps of: receiving a sharing object and sharing authorization information which are appointed by a user through an EPG (Electronic Program Guide), converting the sharing object and the sharing authorization information into sharing strategies and storing; receiving sharing information issued by the user and forwarded by the EPG, classifying and storing the sharing information; carrying out sharing authorization on the sharing information according to the sharing strategies; and sending the sharing information to a corresponding television terminal according to an authorization result. In the invention, through control management on an information sharing manner, dynamic information can be safely and effectively shared among intelligent television users, and service information classes can be dynamically expanded, so that the user lookups the information more flexibly; meanwhile, when massive sharing information and many users exist, sharing performance can be higher and user experiences are better.

The invention discloses a route diffusion method for dynamically generating expansion tree in the network, specifically suitable for the scene of broadcast routing in an Ad hoc network or a Wireless Mesh Network. The invention adopts a method of combining broadcast table, neighbor table and sequence numbers on network nodes, to establish, update and delete the neighborhood relation among network nodes by timely transmitting call packets; and then transmits and forwards broadcast packets according to the setting criterion based on the real-time updated neighborhood. The packet transmission includes: after receiving the broadcast packet transmitting indication from the upper layer, the nodes stuffing packets, adding one to the present network node sequence number, and adding the node address, the node sequence number and neighbor node information in the packet heading, and then transmitting packets; and the packet forwarding includes: nodes receives the broadcast packet from network, looks for the generating nodes of the packets in the broadcast table, compares the sequence number in the packet and the size of the corresponding sequence number in the broadcast table to determine whether the packet is a redundant broadcast report, and then continues the packet forwarding. The route diffusion method for dynamically generating expansion tree in the network adopted by the invention can realize the effective spreading of the broadcast packet, and effectively inhibit the generation of broadcast storm and routing self-loop; the method has relative simple and practical protocol, application in micro scale networking, and fast network convergence rate.

The invention claims an interest packet forwarding method based on data attributes in a vehicle-mounted named data networking. The interest packet forwarding method comprises the steps that: a vehicle node monitors an interest packet sent by a neighbor vehicle, and extracts a position L, a driving vehicle speed V1 and a driving direction D1 of a previous hop vehicle from the interest packet; then the vehicle node calculates waiting time according to a Twait formula, and enters a monitoring state; and the vehicle node forwards the interest packet when the forwarding of the interest packet by other vehicles is not monitored at the end of the wait time, or cancels the forwarding if the forwarding of the interest packet by other vehicles is monitored before the end of the wait time. According to the interest packet forwarding method, the Twait calculation results is changed with the combination of data attribute coefficients, thus the vehicle suitable for assisting in forwarding data with the attributes has the minimal wait time, the forwarding vehicle selection is completed, and the pass back success rate and average transmission delay of the data packet are improved while ensuring the distribution rate of the interest packet.

The embodiment of the invention discloses an implementation method and system for clustering of application servers, which is used for meeting the performance requirement when the number of the application servers in clustering is more. The method disclosed by the embodiment of the invention comprises the following steps: a load balancer receives a task request sent by a user; the load balancer distributes the task request to one of the application servers in clustering; the application server generates session information according to the task request; and the application server stores the session information in a distributed memory cache system memcached which is deployed at the rear end of the clustering of the application servers.

The invention discloses a cloud rendering network deployment sub-system. The cloud rendering network deployment sub-system comprises a proxy server connected with an external network; the proxy server is further connected with at least one virtual machine; the proxy server comprises a control information processing unit and a data information processing unit; the control information processing unit is used for receiving the control information sent by the external network, analyzing the control information, converting the control information into the TCP protocol encapsulated information, and sends the TCP protocol encapsulated information to the corresponding virtual machine; the data information processing unit is used for receiving the data information sent by the virtual machine, converting the data information into the protocol encapsulation way corresponding to the external network, and sending the corresponding protocol encapsulation way to the external network. Through the above-mentioned adaption, the cloud rendering network deployment sub-system disclosed by the invention can support the data transmission among multiple network protocols and facilitate the different clients to access a cloud server, and the user experience is good.

The invention relates to a wireless network system and a wireless network access method. The wireless network system comprises a coordinator and at least one router; the router is selected by equipment to be accessed based on a beacon frame monitoring list, and the router is provided with a white list for authenticating the equipment to be accessed; the coordinator is used for transmitting an authentication result of the white list and identification information of the equipment to be accessed to each router so as to accept / reject a re-connecting request of the equipment to be accessed. Through beacon frame buffer screening for the router, the wireless network system and the wireless network access method of the invention not only could filter ineffective or malicious equipment to be accessed, but also could select to obtain the most effective equipment to be accessed according to historical linkage times, thereby improving the safety performance of the wireless network.

The invention discloses a container cloud service system and a pod creation method and device. The container cloud service system includes at least one node group; the node group includes a pluralityof physical nodes; the pod is created in the physical node, and the pod has at least one virtual network card interface; and a target virtual network card interface that is bridged with an internal network bridge of the physical node exists in the at least one virtual network card interface; wherein communication among different physical nodes in the same node group is carried out through the internal network bridges, so that the different physical nodes in the same node group communicate with each other in the layer two network. The technical scheme provided by the application can support a DR mode in four-layer load balancing.

The present invention discloses a home site backed method. Said method includes standby site monitoring ether net automatic protection system (EAPS) loop forming loop or not, if it is then standby site blocking one own port, and transmitting refreshing media control (MAC) address list message to other slave site. The present invention avoids broadcast storm occurrence in EAPS loop, greatly raising EAPS loop reliability.

The invention relates to a self-adaptive heartbeat method used for maintaining internet of things equipment connection and based on distribution. The method comprises the following steps: the internetof things equipment establishes and maintains the network connection with an internet of things cloud platform through a belonged local area network and initializes a self-adaptive parameter; the internet of things equipment sends self-adaptive parameter request broadcast to the belonged local area network, and updates the self-adaptive parameter and self-adaptive heartbeat period according to the self-adaptive parameter sharing broadcast responded by other equipment in the local area network; multiple detection values needing to perform the detection are determined through exponential growthway or linear growth way, and these detection values are divided into multiple period detection tasks to distribute to multiple internet of things equipment in the local area network to perform the detection. By using the self-adaptive heartbeat method disclosed by the invention, the problems of multiple detection frequencies and long time-consuming in the self-adaptive heartbeat period process of the internet of things equipment are solved, and an efficient detection termination strategy is provided for balancing the detection error and detection efficiency.

An N power broadcasting method for a vehicle-mounted wireless ad hoc network, the invention relates to a broadcasting method for a vehicle-mounted wireless ad hoc network. It solves the defect that collisions are still relatively serious in the state of node saturation in the prior art probabilistic forwarding method. The technical scheme of the present invention is: after each network node receives the broadcast data packet, it first inquires about the ID of the broadcast data packet to see whether it has received the broadcast data packet; if it has already received it, it directly discards the broadcast data packet; if it has never been received, store it and calculate the forwarding probability of this network node; if the forwarding probability of this network node is greater than 1, then forward this broadcast data packet to other network nodes; if the forwarding probability of this network node is less than 1, the broadcast data packet is discarded; the forwarding probability calculation formula of the network node is: Pi=(Lij / R)n×100%. Used for broadcast sending of data.

The invention provides a method for preventing broadcast storm in an Ethernet ring network, and transmission switches for the Ethernet ring network. The method comprises the following step: a transmission switch at each end of a link forcedly forwards a detection message captured from one interface of the transmission switch to the other interface of the transmission switch when the link is restored. The method can avoid the occurrence of broadcast storm due to response lag of equipment when the link is resorted, so as to improve the stability of the Ethernet ring network.

This invention provides one point to point business realization method and exchange device, which sets relative set broadcast address for business sample and uses set broadcast address to convert its mechanism into set mechanism for effective control of broadcast generation, wherein, this invention uses set broadcast address to realize MP2MP business to avoid linkage fault by tree agreement and to limit the fault impact into the data message by the linkage.

The invention provides a method and a system for realizing rapid convergence in a ring network. The method comprises the following steps that: when a link for connecting two nodes in the ring network is converted from disconnection into connection, a port on the node in connection with the link is up-interrupted; when one of the nodes receives the UP interruption earlier, the two nodes perform hand shaking for three times, and the node which receives the UP interruption earlier transmits a ring detection message to the other node; when receiving the ring detection message, the other node setsself port in a forwarding state; and if receiving the ring detection message, the node which receives the UP interruption earlier sets self to be a main node, sets the port receiving the ring detection message to be a main port, sets the port for transmitting the ring detection message to be a slave port and sets the slave port in a block state. The method for realizing rapid convergence in the ring network of the invention has the advantages of high convergence rate and irrelevance between the convergence time and the node on the ring network so as to improve the transmission efficiency of the network.

The invention relates to a group control method for home equipment, belonging to the technical field of smart home devices. The group control method for the home equipment comprises the following steps: a main control device receives the group command configuration information sent by a configuration terminal, wherein the group command configuration information comprises a key number, a multicastIP address and a group control command to be configured; the main control device sends the group control command to the multicast IP address; controlled devices receive and execute the group control command, wherein one or more controlled devices join the same multicast group. The technical problem to be solved by the invention is to provide a group control method for home equipment which can improve the network transmission efficiency and effectively avoid the broadcast storm.

The invention provides a message forwarding method and device for solving the problems of broadcast loops and broadcast storms in the message forwarding process. The message forwarding method comprises the steps of receiving a message sent from a previous node, distinguishing the type of the message, judging whether the message is forwarded or reaches the maximum forwarding hop when the message is distinguished to be a broadcast message, abandoning the message if the message has been forwarded or has reached the maximum forwarding hop, updating the message if the message is not forwarded and does not reach the maximum forwarding hop, forwarding the updated message to other nodes, judging whether a selectable node address of the message is the address of the current node or whether the message is replied when the message is distinguished to be a unicast message, abandoning the message if the selectable node address of the message is not the address of the current node or the message is replied, and replying the message if the selectable node address of the message is the address of the current node and the message is not replied. The method and device avoid broadcast loops and broadcast storms.

The invention discloses an ARP (Address Resolution Protocol) auxiliary model based on an SDN (Software Defined Network). The ARP auxiliary model comprises an ARP datagram filtering module, an ARP request datagram processing module, an ARP response message sending module, an ARP traffic statistics and analysis module and an IP-MAC (Internet Protocol-Media Access Control) mapping table management and configuration module, wherein the ARP datagram filtering module is used for performing format correctness detection on an ARP message reported by a switch; the ARP request datagram processing module is used for answering an ARP request message; the ARP response message sending module is used for constructing and sending an ARP response datagram of a non-empty query result; the ARP traffic statistics and analysis module is used for receiving various ARP message event records and switch port information transmitted by the ARP datagram filtering module and the ARP request processing module; and the IP-MAC mapping table management and configuration module is used for providing management and configuration interfaces of an IP-MAC mapping table. When the ARP auxiliary model is applied to the SDN, ARP broadcast can be effectively isolated; ARP spoofing is prevented; an executor of the ARP spoofing is traced; and global IP-MAC information is managed and maintained.

The invention discloses an intelligent streetlight control system and method based on satellite positioning and cooperation, relates to the field of smart cities, and solves the problem that traditional streetlights cannot light in real time as required. The streetlight control system is composed of a terminal device installed in a vehicle or carried by a pedestrian, a control device installed at streetlight nodes and an intelligent streetlight cooperative control network composed of streetlight nodes. The terminal device obtain its own positional information, including latitude and longitude, direction and speed, by using a satellite positioning module, and the positional information is processed and then is transmitted to a neighboring streetlight node via a wireless link. The streetlight node receives a positional information table sent by the terminal device, shares the information with related streetlight nodes according to an electronic map, and controls the on-off states of the streetlights in accordance with an established strategy. The intelligent streetlight control system is not subject to interference of other objects, is not restricted by terrain, is precise in control, solves accurate lighting and real-time lighting, achieves on-demand intelligent lighting and carry-on streetlights, and is high in energy efficiency.

The method comprises: setting one of multi devices simultaneously located on the bridge between two RPRs (resilient packet ring) as an active device and other devices are set as standby devices; making interaction of device state control messages between active and standby devices to implement the redundancy protection of RPR bridge. By the invention, the switch speed from one failure cross-ring bridge device to other standby devices can be effectively improved.

In this invention, the hardware address analysis method is applied to the inside user interface of communication device, generates the hardware address analysis item for all protocol process cards according to card IP and MAC addresses, and synchronizes all the cards by said analysis item. It applies non-broadcast hardware address analysis method, prohibits the message entering in the inside user interface to avoid broadcast storm, can converse IP address into MAC address reliably and accurately, and convenient to top application program.

The invention relates to a two-layer network data transmission method and a network node. The method comprises that: a balance group is configured for the network node according to a network framework with avoidance of broadcast storm as the principle, and one balance group comprises one or multiple interfaces; the network node receives a message from a receiving interface; and the network node forwards the message to the interfaces of the balance groups apart from the ones in which the receiving interface is positioned. According to the method and the network node, the balance group is configured for the network node according to the network framework with avoidance of the broadcast storm as the principle, when the message is forwarded, the message is forwarded to all other interfaces apart from the ones in which the receiving interface is positioned according to the preset balance groups so that the broadcast storm can be effectively avoided.

A Self-organized network spread spectrum code distributing method based on time-dividing synchronous code dividing multi-address (TD-SCDMA) relates to a OVSF code (orthogonal variable spread spectrum factor code) dynamic distributing method used for constructing self-organized network based on TD-SCDMA, specifically implementation comprises steps of: first step: OVSF applying phase: accomplishing distribution of new user spread spectrum code by alternating message on public control channel and making code character searching rule; second step: OVSF re-distributing phase: re-distributing code character generating code block; third step: OVSF maintaining phase: updating OVSF tree information stored by each node by alternating message on public control channel; fourth step: OVSF releasing phase: releasing occupied code character and father code and son code correspondingly according to OVSF.

The invention discloses a multi-hop cognitive radio network architecture and a deployment method. Directing at the characteristic of a dynamic change of spectrum resources of a radio network and problems existing in actual deployment, the thought of separating SDN control and forwarding and a multi-hop radio network are combined, the architecture consists of a controller and multi-hop cognitive radio nodes, the controller is in charge of collecting global information and issues control information to each cognitive radio node through an OpenFlow protocol, the nodes have functions of cognitive radio and mesh nodes at the same time, and transmitting power can be adjusted. Environmental information and control information between the controller and the cognitive radio nodes are transmitted through a public control channel, and the invention provides a method for establishing the public control channel for actual deployment.

The invention provides a liquid rocket engine ground test bench test data interaction method and a storage medium, wherein, the method comprises the following steps of: transmitting parameter data collected by an acquisition device to a data processing server through a unicast mode. The parameter data received by the data processing server is transmitted to a local area network by a broadcast modefor obtaining by other related devices, wherein, a plurality of other related devices constitute the local area network. On the basis of guaranteeing the reliability of the test system, the inventionimproves the test efficiency and the test flexibility.

The invention discloses a routing method based on software-defined vehicle networking, belonging to the vehicle networking. The method includes the following steps that: 1, a vehicle node periodicallyuploads location information, motion information and neighbor node information to a controller, and the controller generates a global routing table thereby; 2, the vehicle node requests the controller for the routing information to a target node, and the controller sends the routing information to the node according to the request; 3, the vehicle node is connected to the next hop node through a short-range wireless communication technology according to the routing information and transmits data messages; and 4, the abnormal situation is processed in the process of transmitting the message until the target node receives the data message. The invention solves the problem of overhead such as a large number of computing resources required by the nodes when the routing table is being maintained caused by using the location information-based routing method in the Ad-hoc network and by that the mobility of the vehicle nodes in the vehicle networking is high and the topology structure of thenetwork changes rapidly.