34 results about "Broadcast domain" patented technology

The invention discloses a communication system, a communication method and an enhanced gateway, and relates to the technical field of communication. The home gateway accesses the Internet through different WAN ports, such as the WAN port directly connected with the Internet and the WAN port connected with the enhanced gateway and then accessed to the Internet, so that the problem of communication interruption between the home gateway and the Internet caused by failure or abnormity of edge cloud is avoided, and the communication reliability of the home gateway is improved. Moreover, the home gateway, the enhanced gateway and the edge cloud device are arranged in the same broadcast domain, so that the home gateway, the enhanced gateway and the edge cloud device are in the same two-layer network, thereby providing in-cloud service access experience to the edge cloud for users. The enhanced gateway can send the service messages of different destination addresses to different destination devices, so that the function that the enhanced gateway accesses the service messages to the cloud at will is realized, and the internet traffic of the home gateway can be shunted in the enhanced gateway.

A network device can be configured to receive a packet to be replicated in accordance with a virtual local area network (VLAN) replication set having a number of members. The network device can further be configured to identify a first sub-broadcast or layer 2 (L2) domain for the packet and to identify a first sub-broadcast domain replication set corresponding to the first sub-broadcast domain. The first sub-broadcast domain replication set can have a number of members less than the number of members in the VLAN replication set. The network device can further be configured to identify a second sub-broadcast domain replication set for the packet, to replicate the packet a number of times for at least a portion of the members of the first sub-broadcast domain replication set, and to replicate a loopback packet a number of times for members of the second sub-broadcast domain replication set.

One embodiment of the present invention facilitates address resolution protocol (ARP) resolution in an extended subnet. A gateway of a first segment of the extended subnet can determine that a layer-2 address corresponding to a layer-3 destination address of a packet is locally unavailable. The gateway can then determine whether a respective egress interface of an ARP request for the layer-3 destination address is associated with a layer-2 subnet extension from the first segment to a second segment of the extended subnet. The extension can provide a common layer-2 broadcast domain comprising the first and second segments with a same default gateway layer-3 address. If the egress interface is associated with the extension, the gateway can insert a layer-3 address of a first endpoint associated with the extension as a source protocol address in the ARP request. The gateway can send the modified ARP request via the egress interface.

This disclosure describes techniques for interoperability of a blade server in a server chassis, where IOMs of the server chassis do not provide dedicated pins for communicating a physical slot ID to the blade server. BMCs of the blade servers and CMCs of IOMs of the server chassis are mutually configured to broadcast Ethernet frames on layer 2 network segments over a broadcast domain configured by a switch module connected to the blade servers over layer 2 network segments; conduct a slot inference communication protocol using these Ethernet frame broadcasts to enable the CMC to determine a physical slot ID in response to a BMC request, and broadcast that physical slot ID back to the BMC; and use a public certificate-private certificate pair, based in a hardware root of trust, to enforce security of this communication protocol.

The application discloses a whole vehicle OTA parallel flashing upgrade method and device, equipment and storage medium, wherein a plurality of ECUs of a plurality of domains needing to be flashed and upgraded are packaged into a message by an upgrade master module in a T-box according to a broadcast domain or different domains, and the message is transmitted to a gateway; an upgrade agent module at the gateway analyzes the address of the broadcast domain or each domain identified by an ID in the message, and distributes the address to the ECUs of the corresponding broadcast domain or each domain; an upgrade slave module carried in each ECU analyzes the received message, and if the ID information of the ECU is the same as the ID of the ECU, the ECU is flashed and upgraded. According to the application, the parallel flashing of a plurality of ECUs of a preset quantity is realized by one message, the flashing upgrade time is shortened, the transmission amount of the message in the bus is reduced, the problem of excessive load of the bus is avoided, and thus the upgrade speed is obviously improved, and the efficiency of the whole vehicle OTA flashing upgrade is greatly improved.

The invention discloses an enterprise data security access management method and system, and relates to the technical field of security access management, and the method comprises the steps: constructing a broadcast source fingerprint matrix of broadcast data in a target enterprise; constructing a trust mask matrix of an enterprise building broadcast domain based on the network security policy table of the target enterprise, and performing line-by-line mask cutting on the broadcast source fingerprint matrix based on the trust mask matrix to obtain a broadcast source cutting matrix; calculating a bucket-level occupation matrix of broadcast buckets in the enterprise building broadcast domain according to the block aggregation matrix and the broadcast source clipping matrix of the enterprise building broadcast domain; and calculating a delay matrix of the broadcast bucket based on the column cyclic shift matrix and the bucket-level occupancy matrix of the enterprise building broadcast domain. According to the method, the dynamic adaptive capacity and the control closed-loop capacity of the enterprise data security policy are improved.

The present application discloses a network isolation method, apparatus, device and storage medium, belonging to the field of wireless communication technologies. In the present application, when it is detected that a device is connected, the identity information of the device is identified, wherein the identity information is obtained based on the judgment of a base station, and then based on the identity information of the device, the corresponding port is connected, wherein the port is obtained based on the interface-level VLAN division, and finally based on the corresponding port, the data that the device needs to send is forwarded. The present application enables the network traffic of the device to be in different broadcast domains and the traffic data to be isolated, achieving stable network use and high reliability when 5G and WIFI are co-deployed.

The embodiment of the invention provides a message forwarding method and device, a wireless controller and a computer readable storage medium, and relates to the technical field of communication. The wireless controller inquires a tunnel multicast forwarding table according to the multicast address in the received multicast service message to obtain all tunnel information corresponding to the multicast address; and respectively sending the multicast service message to the corresponding wireless access points according to all tunnel information corresponding to the multicast address. According to the method, the destination of the multicast service message can be determined according to the multicast address and the tunnel multicast forwarding table in the received multicast service message, so that the multicast service message is accurately forwarded to the wireless access point where the wireless terminal in the multicast group is located, and the multicast service message does not need to be sent to all wireless access points in the same broadcast domain; the copying and packaging processing of the multicast service message on the wireless controller is reduced, and the forwarding efficiency of the wireless controller on the multicast service message in the tunnel forwarding mode is improved.

The invention relates to a hierarchical broadcasting method and device based on statistical adaptive threshold and scale constraint, and the method comprises the steps: calculating a local delay threshold and a domain scale upper limit of each network node based on the statistical analysis of local network delay; forming a plurality of target broadcast domains by adopting a bidirectional delay verification mechanism based on a local delay threshold and a domain scale upper limit; and on the basis of the formed target broadcast domain, intra-domain message propagation and cross-domain message forwarding are respectively carried out to realize layered broadcast. Through the method and the device, statistical analysis of local network delay can be performed, and the local delay threshold and the domain scale constraint of each network node are dynamically calculated, so that a self-organizing domain is formed on the basis of the local delay threshold and the domain scale constraint to perform layered broadcast; self-adaptive layered broadcasting capable of adapting to network topology dynamic change and node delay distribution difference is realized, and the problem of lack of a self-adaptive layered broadcasting mechanism is solved.

The application discloses a kind of cluster node automatic discovery and access method and product, for the existing centralized cluster discovery target equipment is limited to the same broadcast domain, and cannot judge the problem of target equipment authenticity.New node is discovered by mDNS mechanism, if new node is discovered by management node, the management node directly obtains the TXT content in the DNS information published by new node, extracts the special additional content in TXT and carries out verification, if it passes, further extract the specific content item of the special additional content, construct rechecking data, request the related service of new node by service IP and port information, to complete the rechecking of new node;If it passes, according to the node access function provided by new node and new node normal interaction, complete the access of new node;By the method provided in the application, the target equipment of centralized cluster discovery is no longer limited to the same broadcast domain, and the accuracy of node identification is ensured by double-checking mechanism.

This specification provides a method, apparatus, electronic device, and medium for handling stack splits. The method includes: upon detecting a stack split, adjusting the operating mode of a VRRP group from silent mode to normal mode, and propagating a first VRRP announcement message in the broadcast domain corresponding to the VRRP group. The VRRP group includes a first network device and a second network device. The first VRRP announcement message includes a first reference value and the real MAC address of the first network device. The method also includes receiving a second VRRP announcement message sent by the second network device. The second VRRP announcement message includes a second reference value and the real MAC address of the second network device. If the first reference value is greater than the second reference value, the user processes service packets as the master device. If the first reference value is less than the second reference value, the user silences the service port.

A network device can be configured to receive a packet to be replicated in accordance with a virtual local area network (VLAN) replication set having a number of members. The network device can further be configured to identify a first sub-broadcast or layer 2 (L2) domain for the packet and to identify a first sub-broadcast domain replication set corresponding to the first sub-broadcast domain. The first sub-broadcast domain replication set can have a number of members less than the number of members in the VLAN replication set. The network device can further be configured to identify a second sub-broadcast domain replication set for the packet, to replicate the packet a number of times for at least a portion of the members of the first sub-broadcast domain replication set, and to replicate a loopback packet a number of times for members of the second sub-broadcast domain replication set.

Disclosed are a communication system, a communication method and an enhanced gateway, relating to the technical field of communications. A home gateway accesses the Internet by means of different WAN ports, such as a WAN port that directly connects to the Internet, and a WAN port that connects to an enhanced gateway before accessing the Internet, so that the problem of communication interruption between the home gateway and the Internet caused by edge cloud failure or abnormity is avoided, and the communication reliability of the home gateway is improved. Moreover, the home gateway, the enhanced gateway and an edge cloud device are arranged in the same broadcast domain, so that the home gateway, the enhanced gateway and the edge cloud device are in a two-layer network, thereby providing a user with an in-cloud service access experience to an edge cloud. The enhanced gateway can send service packets of different destination addresses to different destination devices, so that the on-demand cloud access function of the enhanced gateway on the service packets is realized, and the Internet traffic of the home gateway can be offloaded in the enhanced gateway.

The invention provides an Ethernet redundancy device independent of a switch multicast function. The device comprises a broadcast module and a communication module, the broadcast module is used for periodically sending and receiving broadcast messages through each physical network port in each terminal device, and constructing an address mapping dictionary corresponding to each terminal device; the communication module is used for determining to-be-sent data, a source network address corresponding to the to-be-sent data and a target network address corresponding to the to-be-sent data; determining a source physical address of each source network port corresponding to the source network address and a target physical address of each target network port corresponding to the target network address according to an address mapping dictionary; determining a target sending message according to each source physical address and each target physical address; and sending the target sending message to the corresponding target network port. According to the device provided by the invention, in a single broadcast domain, without relying on a multicast function of a switch, on the premise of not sending a main communication message through broadcast, the message can be repeatedly sent only by using the terminal equipment.

The present invention discloses a method for implementing multiple services in a Mesh network. The Mesh network includes a main router and one or more sub-routers. Among them, on the main router, the Backhaul AP interface serves as the downlink port and performs full-service binding. The services with Vlan coming from the upstream of the sub-router are directly forwarded to the corresponding Vlan services through the Backhaul STA interface, so that the main and sub-routers support services of different Vlans. In the Mesh wireless networking scenario, the present invention realizes multi-service forwarding between the Backhaul and Fronthaul interfaces based on Mesh: services such as tr069 go through the specified Vlan, and the service data can be restricted by priority; the broadcast domain is restricted within one Vlan, saving bandwidth and improving network processing capabilities. The present invention also provides a corresponding Mesh networking multi-service system.

The forwarding of BUM traffic in routers and / or switches (e.g., in environments such as interconnected L2 broadcast domains, such as DCs and DCIs with a VXLAN overlay) is improved so that BUM traffic is properly forward, but with reduced (e.g., eliminated) unnecessary duplication and / or flooding.

The invention provides an Ethernet redundancy design method and device independent of a switch multicast function, and the method comprises the steps: periodically transmitting a first broadcast message to each non-transmitting end device in a broadcast domain through a plurality of first network ports, so as to enable a receiving end to determine a first address mapping relation of a transmitting end; receiving a second broadcast message sent by each second network port of each non-sending end device in the broadcast domain, and determining a second address mapping relationship of a receiving end; and determining each target network port of the receiving end according to the second address mapping relationship, constructing a first target message, and sending the first target message to each target network port from each first network port, so that the receiving end performs redundancy processing on the first target message after identifying the preset digital identifier to obtain target data. The method provided by the invention does not depend on the multicast function of the switch in the single broadcast domain, does not need to send the main communication message through broadcast, and only uses the terminal equipment in the broadcast domain to complete message repeated sending and realize redundancy processing.

The present invention proposes a database security control method and system incorporating a network partitioning function. Network partitioning refers to dividing a large network into several smaller sub-networks, thereby improving network performance, security, and management efficiency. Network partitioning can be carried out at different levels and angles. In the IPv4 network, a common network partitioning is to divide a large IP address range into multiple subnets through subnet division. Each subnet has its own IP address range, which helps to improve network performance and reduce the size of the broadcast domain. The present invention adopts a multi-node deployment method, that is, one to multiple sets of database security control services are deployed in each network partition; when a user submits an access request, a corresponding database security control service in a selected network partition is automatically used to process the request. After adopting the present invention, a heuristic optimization weighted round-robin load balancing algorithm based on real-time load can be realized. This algorithm can dynamically adjust the weights according to the real-time performance of the servers, so as to more evenly distribute the request load and improve the overall performance and stability of the system.

The invention belongs to the technical field of cross-regional virtual network cable connection, and particularly relates to a cross-regional virtual network cable connection system and method based on a 4G network, and the system comprises at least one pair of virtual network cable terminal devices which are interconnected through the 4G network; the terminal device comprises a physical network port module, a 4G communication module, a virtual network bridging module and an encryption transmission module. The physical network port module is used for connecting local area network equipment, and the virtual network bridging module carries out two-layer bridging on a physical network port and a virtual network card to form a cross-regional extended broadcast domain. Through an original MAC layer tunnel technology, seamless expansion of a two-layer broadcast domain is realized in a 4G network for the first time, the industrial problem that protocols such as ARP / DHCP and the like in a traditional VPN scheme cannot be subjected to unvarnished transmission is thoroughly solved, and cross-region equipment obtains communication experience which is completely consistent with that of a local area network.

A system that comprises an IP-routed interregional distribution network, each comprised of two or more IP-routed regional distribution networks (RDN), each of which employs two or more user-network interfaces (UNIs), each including (a) a physical network including any device capable of operating at network layers 2 and 3, (b) a first virtual broadcast domain (VBD), (c) a second VBD, (d) a regional virtual extensible local area network (VXLAN), and (e) a protocol transformation stack (PTS). The UNI is adapted for layer 2 connection to a user device via the first VBD, and adapted for layer 3 communication over the IP-routed RDN via the VXLAN. The PTS is adapted to convert a layer 2 broadcast domain to / from an IP-routable form by mapping the first VBD to the second VBD, encapsulating the second VBD into the regional VXLAN, and translating that VXLAN into a second interregional VXLAN.

The embodiment of the invention provides a message processing method, electronic equipment, a computer readable storage medium and a computer program product. The message processing method comprises the steps that an access member mapping table is acquired, and the access member mapping table comprises at least one broadcast domain and the corresponding relation between access members contained in each broadcast domain; based on the access member mapping table, determining a target chip on a target single board for forwarding a target message in each broadcast domain, the target message being a message whose broadcast group member exit is a tunnel member port; and forwarding the first message through a tunnel member port on a target chip in a target broadcast domain to which the first interface belongs in response to the fact that the first message is received from the first interface and one broadcast group member outlet of the first message is the tunnel member port. According to the technical scheme, unnecessary copying operation is reduced, and copying resources are saved.

The present invention relates to a distributed reconstruction resource management method based on cloud devices. The distributed reconstruction resource management method is applied to a distributed reconstruction system for medical image reconstruction in a medical imaging device. A plurality of nodes implementing a data reconstruction program are configured in the distributed reconstruction system. All nodes are located in a broadcast domain of the distributed reconstruction system and periodically broadcast available resource information in a broadcast manner. The method includes: the first node and each node in the broadcast domain update their respective available resource information in real time; if the first node in the broadcast domain receives a local reconstruction task, then according to the resource allocation strategy, the available resource information of the current first node, and the available resource information of other nodes in the broadcast domain, data segmentation of the local reconstruction task is performed and threads for the segmented data are created to distributively complete the local reconstruction task. The above method improves the data processing speed and solves the problem of uneven computing resources.

The invention provides a resource access method and device, electronic equipment and a storage medium, and the method comprises the steps: detecting the change of a real network address of resource equipment in real time based on a response message of an address resolution protocol (ARP) in a broadcast domain where the resource equipment is located and a physical address of the resource equipment; under the condition that the change of the real network address of the resource equipment is detected, based on the changed real network address, updating a mapping relation between the virtual network address and the real network address of the resource equipment; and performing resource access on the resource equipment based on the updated mapping relation. According to the method and device, the electronic equipment and the storage medium provided by the invention, the mapping relation can be correspondingly updated along with the change of the real network address, and resource access is performed on the resource equipment based on the updated mapping relation, so that the resource access can support the change of the real network address of the resource equipment, and the resource access efficiency is improved. Therefore, the reliability and the stability of resource access are ensured.

The invention provides a device communication method, an electronic device and a computer readable storage medium, relates to the technical field of industrial Internet of Things, and is applied to a communication system comprising a plurality of electronic devices supporting the same soft bus communication architecture. The electronic equipment can comprise a plurality of mine-mounted terminal equipment and network infrastructure equipment, and the electronic equipment is distributed in a plurality of local area networks (such as a local area network A and a local area network B). In the method, root node equipment of a local area network A can send parameter information of trusted equipment in a local area network B to red-mine terminal equipment in the local area network A; and the red-mine terminal equipment in the local area network A can discover the red-mine terminal equipment in the local area network B based on the parameter information, and sends data to the red-mine terminal equipment in the local area network B through the root node equipment of the local area network A and the root node equipment of the local area network B, so that the limitation of an original broadcast domain of a soft bus communication architecture is broken through, cross-local area network interconnection is realized, and the communication efficiency is improved. And the number of devices supported by the soft bus communication architecture is obviously increased.

Techniques are described for providing managed computer networks, such as for managed virtual computer networks overlaid on one or more other underlying computer networks. In some situations, the techniques include facilitating replication of a primary computing node that is actively participating in a managed computer network, such as by maintaining one or more other computing nodes in the managed computer network as replicas, and using such replica computing nodes in various manners. For example, a particular managed virtual computer network may span multiple broadcast domains of an underlying computer network, and a particular primary computing node and a corresponding remote replica computing node of the managed virtual computer network may be implemented in distinct broadcast domains of the underlying computer network, with the replica computing node being used to transparently replace the primary computing node in the virtual computer network if the primary computing node becomes unavailable.

The invention belongs to the field of computer networks, and particularly relates to an Internet of Things equipment network planning method based on building space topology, which comprises the following steps: acquiring building space structure information and equipment deployment plan information, analyzing the total number of equipment and the total number of buildings to determine a two-layer or three-layer network hierarchical architecture, and generating a network topology structure; analyzing equipment density based on the three-dimensional equipment matrix, and automatically dividing equipment into a plurality of VLANs in combination with a preset broadcast domain threshold according to spatial position information and / or equipment types; based on the building number, the floor number and the room number in the spatial topology tree, generating an IP address with spatial semantics for each device; based on the number of the devices, the bandwidth requirements and the network topology structure, the specification and the number of the switches are determined; and generating a complete network deployment scheme comprising a network topological graph, a VLAN configuration table, an IP address allocation table, a bill of materials and a switch configuration script. According to the scheme, automatic planning of the network is realized.

A system determines a replication threshold for a device operating as a tunnel endpoint in an overlay network. The replication threshold indicates a capacity of replication resources of the device. The system obtains a current replication count for the device corresponding to a virtual extensible local area network (VXLAN). The system selects a replication type for a broadcast domain specific to the device and the VXLAN based on the replication threshold and the current replication count. The replication type indicates one of: a first type associated with an ingress replication broadcast domain comprising unicast tunnels; a second type associated with an underlay multicast broadcast domain comprising multicast tunnels; and a third type associated with a hybrid broadcast domain comprising a combination of the first type and the second type. The system creates the broadcast domain specific to the device and the VXLAN based on the selected replication type.

This invention relates to the field of data transmission technology, and in particular to a network encoding transmission method, storage medium, and firmware upgrade method. The method includes the following steps: S100, obtaining the data packet reception status of each node in the same broadcast domain; S200, each node generates the length of a transmission contention window based on the data packet reception status; S300, analyzing the scarcity of each file block based on the data packet reception status of each node; the data packet reception status includes received file blocks and unreceived file blocks; S400, the nodes generate encoding results based on the scarcity of each file block; S500, each node broadcasts data packets sequentially according to the length of the transmission contention window and the encoding results; S600, each node receives data packets broadcast by other nodes and decodes the data packets based on its own data packet reception status. This solution can reduce collisions and interference during data transmission and improve data transmission efficiency.

The invention discloses a cross-protocol unified interactive screen projection method and a cross-protocol unified interactive screen projection system for a smart television. The method comprises the following steps: integrating an AirPlay protocol, a DLAN protocol and a Miracast protocol into controlled equipment; configuring broadcast domains corresponding to the AirPlay protocol, the DLAN protocol and the Miracast protocol respectively, and enabling the AirPlay protocol, the DLAN protocol and the Miracast protocol to carry out session and data transmission through different broadcast domains respectively; creating a controlled device name, and selecting a corresponding broadcast threshold to publish the controlled device name according to the protocol category; a corresponding data transmission channel is established according to the screen projection protocol selected by the main control equipment; a plurality of screen projection protocols can be subjected to screen projection on one controlled device, a screen projection system is reconstructed, fusion of different protocols is supported, and heterogeneous screen projection multi-path fusion is supported; the defects that the screen projection function of the controlled equipment is low in later maintenance efficiency, complex and high in cost are overcome, the universality and the universality of screen projection of the controlled equipment are improved, the screen projection function of the controlled equipment is efficiently and simply maintained at low cost in the later period, and the usability is improved.

According to the communication method and device, in the method, a first device sends first information to a plurality of second devices, and the first information comprises a first message, a message number of the first message and a timestamp of the first message. Wherein the first information is used for the plurality of second devices to simultaneously broadcast the first message according to the message number of the first message and based on the timestamp of the first message. The plurality of second devices belong to the same broadcast domain. According to the method, multiple second devices can broadcast the first message according to the message number of the first message and based on the timestamp of the first message at the same time, and SFN broadcasting is achieved.