68 results about "Label switching" patented technology

U-Turn detour paths, though the head-end router of a primary label switched path (LSP), are configured and used to enable fast failover to a secondary LSP, while avoiding reserving bandwidth (e.g., on links unused by primary and secondary paths) unnecessarily.

This disclosure describes techniques for detecting and monitoring paths in a network. The techniques include causing a source node to generate probe packets to traverse a multi-protocol label switching (MPLS) network, for instance. In some examples, the probe packets include entropy values that correspond to individual equal-cost multi-path (ECMP) paths of the network. The probe packets may be received at an SDN controller from a sink node after traversing the network. Analysis of the probe packets allow path discovery and mapping of the entropy values to ECMP paths. The mapping of discovered paths may be used for optimization of network monitoring activities, including second subsequent probe packets over particular ECMP paths based on the mapped entropy values.

Systems and methods at a reflector node include steps of receiving a request from an initiator node in the network, the request having been sent in a forward direction from the initiator node to the reflector node to discover a reverse path in a reverse direction from the reflector node to the initiator node, and transmitting a reply to the initiator node with one or more reverse Segment Routing (SR) policies that meet one or more path constraint parameters in the request. The reply can include associated Segment Identifiers (SIDs) for the one or more reverse SR policies. The steps can further include implementing one of Bidirectional Forwarding Detection (BFD) or a Multi-Protocol Label Switching (MPLS) Ping procedure with the initiator node, sent over one of the one or more reverse SR policies.

The invention provides a label switching method and device, equipment, a storage medium and a product, and belongs to the technical field of computers. The method comprises the following steps: in response to any label triggering operation in a Web application, obtaining a label identifier of a target label; whether the label identification of the target label exists or not is matched in a label list, and the label identification of any opened label is stored in the label list; when the label identification of the target label exists in the label list, updating a key of a content area component of a key-alive component to be the label identification of the target label, the key-alive component being used for caching a content area of a tab corresponding to any label; and according to the key of the content region component of the key-alive component, displaying the cached content region of the tab corresponding to the target tag in the target region. The invention aims to provide an efficient content area switching mode in a label switching process.

The invention discloses an air-space-ground network congestion control method based on deep reinforcement learning, which realizes rapid dynamic response and global resource optimization through distributed node cooperation and dynamic service rate adjustment. According to the method, modeling is carried out based on a multi-node agent Markov decision process, a composite reward function is designed, and strategy optimization algorithm training is driven by the composite reward function; a'centralized training-distributed execution 'framework is adopted in the framework, strategy network parameters are optimized in the centralized training stage, the service rate of each node is independently adjusted by each node based on local observation in the distributed execution stage, and global communication is not needed. Aiming at the characteristics of high dynamic topology and resource limitation of a satellite network, a label switching path is constructed by using an MPLS traffic engineering protocol, and link capacity fluctuation and satellite orbit movement can be dynamically adapted. According to the method, accurate queue control of air-space-ground node congestion control is realized, the throughput of the network is remarkably improved, and a reliable solution is provided for efficient congestion control of the air-space-ground network.

The invention discloses a multi-protocol label switching optimization method and device, equipment and a storage medium, and relates to the technical field of network communication, and the method comprises the steps: obtaining current network flow data and network state data; obtaining a bandwidth utilization rate, a link utilization rate and a network traffic type according to the traffic data of the network; generating optimization parameters based on the network state data, the bandwidth utilization rate, the link utilization rate and the network flow type, wherein the optimization parameters comprise a label allocation table, a target forwarding path and a bandwidth adjustment instruction; and optimizing the multi-protocol label switching network according to the optimization parameters. According to the invention, the optimization of the multi-protocol label switching protocol is completed through intelligent label management, the technical problems of resource waste and congestion delay are solved, and the efficiency and flexibility of the multi-protocol label switching network are improved.

Aspects of the subject disclosure may include, for example, a device, including: a processing system including a processor; a clock; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations of: advertising via Border Gateway Protocol (BGP) a capability as a precision timing protocol (PTP) master clock through an Internet Protocol (IP) / Multi-Protocol Label Switching (MPLS) network, wherein the advertising includes an IP address of the device; receiving a unicast signaling mechanism from a PTP client node in the network; and sending clock messages to the PTP client node responsive to accepting the PTP client node. Other embodiments are disclosed.

A method for establishing a temporal label switched path (T-LSP) implemented in a node in a network. The method includes receiving a path request including a time interval and a set of constraints; obtaining traffic engineering information from a first database; computing, by the node, a path satisfying the time interval and the set of constraints based on the traffic engineering information obtained; storing the time interval and the set of constraints in a second database; and instructing an ingress node of the temporal LSP to signal the temporal LSP in the network along the path computed at a start of the time interval identified in the path request and to tear down the temporal LSP at an end of the time interval identified in the path request.

The present disclosure relates to specifying and utilizing paths through a network. Traffic engineering refers to the process by which a network manager defines a specific path through a network for a series of data message flows. Methods used to date include MPLS (Multi-Protocol Label Switching) technology, which adds path description information between the Layer 2 and Layer 3 headers. Due to this location of the path description, MPLS is often referred to as a Layer 2.5 protocol. However, MPLS technology and other previous traffic engineering technologies do not easily support encapsulating tenant identifiers. Binding these existing solutions to tenants would require additional strategies and multiple encapsulations for the overlay and underlay layers.

The invention discloses an SDN (Software Defined Network) controller network domain division method based on an MPLS (Multi-Protocol Label Switching) network, which comprises the following steps: (1) MPLS configuration item resource static planning: carrying out static range division according to a hardware resource condition, the number of actually required domain division and an actual condition of an actual multi-department network management monitoring permission; (2) deploying controllers according to domains: the SDN controller obtains whole network topology data through equipment directly connected with the SDN controller, the equipment directly connected with each domain controller is different, and the controllers between the domains do not influence each other and work independently; (3) deploying network management software: each piece of network management software is only allowed to issue an instruction to the controller in the respective domain, and the network management software running in the network does not influence each other and independently works; and (4) realizing network domain division. According to the invention, in the SDN architecture, a domain-divided networking mode is provided for centralized networking, so that the requirements of multi-department network management monitoring or different services and authority are met, and the network stability and the operation and maintenance efficiency are improved.

The invention provides a network flow analysis method, device, equipment and medium, and the method comprises the steps: analyzing a packet header of any data packet, and when the packet header of any data packet is analyzed to a tunnel encapsulation layer protocol, if the tunnel encapsulation layer protocol is a multi-protocol label switching protocol, sending the packet header of any data packet to a network; the method comprises the following steps of: storing a first analysis result which comprises metadata extracted from header information of each layer of protocol which is analyzed at present when a label stack of a multi-protocol label switching protocol is analyzed and a protocol type identifier which cannot be analyzed exists in a current analysis position of the label stack of the multi-protocol label switching protocol is identified, and then returning to an initial analysis position of the label stack so as to obtain a second analysis result which comprises metadata extracted from header information of each layer of protocol which is analyzed at present; and determining a target analysis protocol from the protocol feature library, and performing analysis again from the initial analysis position to obtain a second analysis result, thereby determining a stream analysis result based on the first analysis result, the second analysis result and third analysis results of the remaining protocols. According to the embodiment of the invention, information loss in an analysis process can be avoided.

Method for reporting unavailability in a label-switched network (110), wherein the method comprises: Determination by a switch (124) of the label-switched network that a label-switched path (170) is not available for forwarding a packet (102); Generating a notification message (104) to collect unavailability information at each upstream hop of the label-switched path, wherein the notification message: a depth indicator showing the depth (324) of the collected unavailability information (306), and an input label (326) of the packet at the switch, where the depth indicates how many switches contributed to the unavailability information; a label-switching header (304) of the packet, on the basis of which the packet is forwarded on the label-switched path; and containing an inner header (302) of an inner package that is encapsulated within the package; In response to the fact that the switch is an intermediate switch on the label-switched path, the notification message is forwarded to an upstream switch (122) on the label-switched path, allowing the upstream switch to gather further unavailability information in the notification message; and in response to the fact that the switch is an edge switch (112) on the label-switched path, Identifying a service identifier of the label-switching header in the notification message, where the service identifier is associated with a service provided through the label-switching path; and Identification of a service database based on the service identifier.

The construction method of NALU (Network Abstraction Layer Unit) for IPv6 label switching and its using algorithms of video encoding, QoS control, and decoding are provided. According to an embodiment of the present invention, the NALU format is composed of the NALH (Network Abstraction Layer Header) including the label and the NAL (Network Ab¬ straction Layer) payload. Here, the label is determined based on layer information which is combination of a spatial scalable level, a temporal scalable level, and a quality scalable level of the encoded data. The decoder uses the label to decide which one of multiple decoding modules is used to decode the current NAL payload. Moreover, the label can be included in the packet header so that the MANE (Media Aware Network Element) can use the label to decide whether to forward the packet or drop it. For example, the label in the packet header can be used for QoS control of video service by using the flow label field in IPv6 packet header. The IPv6 router can identify priority of the video packet by using the 20 bit long flow label, into which the label in NALH can be inserted. According to the embodiment, the MANE assumed in the MPEG and JVT (Joint Video Team) can be implemented effectively.

The application discloses a kind of security transmission and access method for hydropower station data, it is related to the security transmission and access field of hydropower station data, comprising: the application is by analyzing the service type of hydropower station data and equipment control level, dynamically add high, medium, low security level label, and according to security level label for hydropower station data preselect corresponding transmission path;Real-time acquisition quality index, when monitoring any quality index exception of transmission path, after generating path quality degradation event, priority ranking and screening are carried out to standby path, and data stream switching is carried out using multi-protocol label switching technology;By establishing user access frequency baseline, and real-time monitoring its access behavior to high security level data, dynamically implement access permission downgrade or additional authentication requirement, realize the real-time requirement of hydropower station data transmission, and the dynamic risk management of access control, effectively improve the real-time of hydropower station data whole process.

An embodiment of the present invention provides a method for notifying an associated path, a path calculation client, and a path calculation unit. The notification method includes: constructing a Path Computation Element Communication Protocol (PCEP) message according to an associated label switched path, where the PCEP message includes extended association identification information, and the extended association identification information is used to represent an association identification assigned to the associated label switched path, and the length of the extended association identification information is greater than 2 bytes; sending the PCEP message to the path calculation unit, so that the path calculation unit establishes or updates the association relationship information of the associated label switched path according to the extended association identification information. By carrying the extended association identification information with a length greater than 2 bytes in the PCEP message, the embodiment of the present invention solves the problem that the association identification exceeding the basic value cannot be transmitted between devices and controllers in practical applications.

A method to establish an optimized frame format used by a first compute node (21) acting as ingress PE and a second compute node (22) acting as egress PE in the transport of overlay ethernet traffic containing an IP payload from the source overlay endpoint attached to or hosted in the first compute node (21) to the destination overlay endpoint attached to or hosted in the second compute node (22) through a Multi Protocol Label Switching, MPLS, underlay network (2), where the frame format is a conventional MPLS tagged ethernet frame format, wherein an MPLS label stack is inserted between the ethernet header and the IP header of the overlay ethernet frame, where the single ethernet header carries the destination and source overlay Media Access Control, MAC, addresses when the frame was originated from the source overlay endpoint, where the MPLS header of the frame comprises a top label with the Label Switch Path, LSP, label towards the destination Provider Edge, PE, router, ie. egress PE, and a bottom label, e.g. an optimization MPLS label, holding information enabling the forwarding mechanism in the egress PE router to restore the original destination and source overlay MAC addresses.

The present invention discloses a congestion control method for air-space-ground networks based on deep reinforcement learning, which realizes fast dynamic response and global resource optimization through distributed node cooperation and dynamic service rate adjustment. This method is modeled based on the multi-node agent Markov decision process, designs a composite reward function, and uses it to drive the training of the policy optimization algorithm. The framework adopts a "centralized training - distributed execution" framework. During the centralized training stage, the parameters of the policy network are optimized, and during the distributed execution stage, each node independently adjusts the service rate of each node based on local observations without global communication. In view of the high-dynamic topology and resource-limited characteristics of satellite networks, the MPLS traffic engineering protocol is used to construct label-switched paths, which can dynamically adapt to link capacity fluctuations and satellite orbit movements. The present invention realizes accurate queue control for congestion control of air-space-ground nodes and significantly improves the throughput of the network, providing a reliable solution for efficient congestion control of air-space-ground networks.

The invention discloses a multi-network processing unit cooperative MPLS message processing method and system, the system at least comprises a first network processing unit located at an entrance and a second network processing unit located at an exit port, and the network processing units are sequentially connected through internal loopback ports; wherein the first network processing unit is used for identifying an MPLS (Multi-Protocol Label Switching) message and adding a custom mark and a traceability VLAN to the MPLS message; redirecting the MPLS message added with the custom mark and the traceability VLAN to an internal loopback port, and enabling the MPLS message to finally reach a second network processing unit after loopback; the second network processing unit is used for further processing according to the custom mark in the MPLS message, including stripping and complementing the label and / or modifying the traceability VLAN; and redirecting the processed MPLS message to a final output port. According to the method, the function limitation and the performance bottleneck of a single processing unit are effectively overcome, and the efficient and flexible forwarding of the complex MPLS flow is ensured.

In some implementations, a head Level 2 (L2) node of an intermediate system-intermediate system (IS-IS) flood reflection (FR) network may determine an end-to-end path from the head L2 node to a tail L2 node of the IS-IS FR network. The IS-IS FR network includes a plurality of L2 nodes and a plurality of FR clusters that each comprise a plurality of Level 1 (L1) nodes and a plurality of L1 and L2 (L1 / L2) nodes connected by a plurality of L1 links. The head L2 node may send information associated with the end-to-end path to another node identified in the end-to-end path to cause a label switched path (LSP) to be established from the head L2 node to the tail L2 node, wherein the LSP traverses one or more L1 links within an FR cluster of the IS-IS FR network.

Mobile User Plane (MUP) over Multi-Protocol Label Switching (MPLS) is implemented over an access an access network connecting a provider edge router to a gateway router, the gateway router being connected to a base station having a wireless connection to user equipment (UE). Traffic between the provider edge router and the gateway router is routed according to both of multi-protocol label switching (MPLS) protocol and mobile user plane (MUP) protocol. An MUP-controller may discover the UE, base station, and corresponding tunnel information and transmit this information to the provider edge router and gateway router, which then create an MPLS label and routing entries to implement MUP.

A network device may receive an MPLS packet destined for a destination via a label-switched path (LSP), and may determine whether to apply a first special purpose label (SPL) option or a second SPL option for a label stack of the MPLS packet. The network device may apply, when the first SPL option is determined to be applied, one of a first type of the first SPL option for the label stack via a policy data indicator (PDI) and policy data (PD), or a second type of the first SPL option for the label stack via the PDI and the PD. The network device may forward the MPLS packet to a hop of the LSP based on the first type of the first SPL option or the second type of the first SPL option applied to the MPLS packet.

The embodiment of the invention provides a container communication method, electronic equipment and a medium, and the method comprises the steps: obtaining the destination address information of a to-be-forwarded IP message in a source container, and determining a forwarding label according to the destination address information; packaging the IP message according to the forwarding label to obtain an MPLS (Multi-Protocol Label Switching) message; and sending the MPLS message to a next hop node, so that the next hop node sends the MPLS message to the destination container according to the forwarding label. Therefore, the IP message of the source container is packaged into the MPLS message and sent to the next hop node, so that the limitation of the IPACL set in the subsequent node including the next hop node on the IP message of the source container is reduced, the communication capability between the containers is improved, and the condition of abnormal communication between the containers caused by the IPACL of the node is reduced.

The invention discloses an air-ground aviation data remote loading method, and the method comprises the steps: S1, ground end loading: carrying out the electronic distribution of an LSP (Label Switched Path) at a ground end to a ground server through software supply after the LSP is authenticated by a digital certificate authority; s2, loading to the airborne end by the ground end, and transmitting through a satellite communication link and / or an Ethernet link; and S3, airborne end loading: receiving the input data of the ground end by an airborne end receiver, transmitting the input data to an airborne service, and finally loading the input data to the LRU. The problems of low efficiency, single loading mode, high economic cost and the like of a software loading mode of a civil aircraft depending on a physical medium are solved, and the data interaction capability and the operation efficiency of the civil aircraft are remarkably improved.

In one embodiment, a wireless access point receives, from a mobile system, a broadcast beacon that includes a roaming notification indicating that the mobile system intends to roam to the wireless access point. The wireless access point allocates, after receiving the broadcast beacon from the mobile system, an orthogonal frequency-division multiple access resource unit for use by the mobile system. The wireless access point sends a trigger message to the mobile system that includes an indication of the orthogonal frequency-division multiple access resource unit. The wireless access point performs, after sending the trigger message, a handoff exchange with the mobile system using the orthogonal frequency-division multiple access resource unit to attach the mobile system to the wireless access point.

Interworking between different layer two (L2) medias using network tunnels is provided by receiving, at a virtual gateway network element (GNE), a packet from a first L2 media type network for transmission to a second L2 media type network under the control of a different entities, wherein the first and second L2 media type networks are incompatible for direct packet transmission; removing, at the virtual GNE, ethernet encapsulation from the packet; re-encapsulating, at a network device located between the virtual GNE and a packet network, the packet in a multi-protocol label switching (MPLS) encapsulation; forwarding, over the packet network, the packet from the network device to a digital communication channel (DCC) associated with the second L2 media type network; replacing, at the DCC, the MPLS encapsulation with a link access protocol (LAP) encapsulation; and transmitting the packet encapsulated with the LAP encapsulation to the second L2 media type network.

U-Turn detour paths, though the head-end router of a primary label switched path (LSP), are configured and used to enable fast failover to a secondary LSP, while avoiding reserving bandwidth (e.g., on links unused by primary and secondary paths) unnecessarily.

The invention discloses a traffic management method, device and equipment and a storage medium, and relates to the technical field of computer network traffic management and optimization, and the method comprises the steps: obtaining a switch configuration address, a switch configuration path and a to-be-sent data packet; locking a mapping relation between each switch port and corresponding target equipment based on the switch configuration address, and determining a static address table; setting a routing path and a priority corresponding to each data flow based on the switch configuration path, and determining a static routing table; switching a network label corresponding to the to-be-sent data packet based on the static address table and the static routing table, and determining label switching information; and forwarding the to-be-sent data packet along the forwarding path identified by the label switching information to complete routing flow management. According to the invention, the static address table and the static routing table are utilized to accurately control the data flow and select the optimization path, network label switching is carried out to realize rapid and efficient forwarding, and the flow optimization efficiency is improved.

The invention provides a label switching-oriented credit value flow control method, which comprises the following steps of: performing two-tuple marking of forwarding equivalence classes and tunnel IDs at an ingress router, and binding a corresponding credit value for each forwarding equivalence class; when it is detected that the forwarding equivalence class carries out traffic transmission, controlling the credit value corresponding to the forwarding equivalence class to be reduced from an initial value to zero at a preset sending slope so as to prevent traffic transmission, and then controlling the credit value to be increased from zero to the initial value at a preset idle slope so as to recover traffic transmission; wherein the sending slope is the slope of the credit value falling process along with the time, and the idle slope is the slope of the credit value rising process along with the time. Therefore, the invention can effectively prevent a single service from occupying excessive bandwidth, and optimize fair distribution of network resources.

The invention discloses a method and equipment for forwarding a multi-protocol label path message. The method comprises the following steps: receiving a packaged MPLS (Multi-Protocol Label Switching) message with an inter-chip communication head through a stacking port; a next hop MPLS label is packaged in the MPLS message; identifying a local port corresponding to a virtual outbound interface applied by an opposite end carried by the inter-chip communication head; a communication head between the chips is peeled off; and applying for a local port corresponding to the virtual outbound interface through the opposite terminal, and sending the MPLS message.