65 results about "Metro Ethernet" patented technology

A method of operation for a provider edge device of a core network includes receiving a customer frame from an access network; the customer frame having a first Virtual Local Area Network (VLAN) tag of a first predetermined bit length. The first VLAN tag including a service instance identifier. The service instance identifier of the first VLAN tag is then mapped into a second VLAN tag of a second predetermined bit length greater than the first predetermined bit length. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

A novel fast and scalable protection mechanism for protecting hierarchical multicast service in ring based networks. The mechanism of the present invention is especially suitable for use in Multi-Protocol Label Switching (MPLS) ring based networks such as Metro Ethernet Networks (MENs). The mechanism provides fast protection for MPLS based point-to-multipoint (P2MP) Label Switched Paths (LSPs) in a scalable manner. Each multicast connection on each ring in the network is split into two sub-LSPs: a primary P2MP sub-LSP originating on a primary node and a secondary P2MP sub-LSP originating on a secondary node traveling opposite to the primary path. For each node to be protected, a point-to-point protection tunnel is provisioned from that node to a secondary node that forwards the packets to the secondary path on all child rings connected to that parent ring through the protected node and that are provisioned to receive the specific multicast connection. In the event of a failure, all the multicast traffic on that ring is directed through the protection tunnel to the secondary node. Upon exiting the protection tunnel, the packets are forwarded to the secondary LSP on the child rings for which this node is the secondary node and also continue along the primary LSP on the parent ring and along all child rings for which this node is the primary node.

According to the present invention, methods and apparatus are provided to allow efficient switching of frames for transmission between a Layer 2 Virtual Local Area Network such as a Metro Ethernet Network and an external network. Reserved inner tags are used to identify particular services. In one example, inner tags allow mapping of frames associated with a particular subnetwork onto a particular virtual circuit associated with an ATM network.

An automatic service discovery approach allows a network management system to discover service managed objects from the network, eliminating the need for a user or other management application to provide such information. As a result, a network management system can automatically perform network-level or services level discovery of objects and services for which network components have no understanding. Embodiments are applicable, for example, in the context of management of packet voice (VoIP, VoATM) and metro Ethernet (TLS service) domains, as well as other domains.

The problems of large tables in Ethernet switches used on a metropolitan area scale, and the exposure of the enterprise network topologies, can be avoided by encapsulating each original Ethernet packet, which originates in a first network of an entity, e.g., an enterprise, a customer, or a network service provider, within another Ethernet packet which is given a source address that identifies the new encapsulating packet as originating at a port of a switch that is located at the interface between the first network in which the original packet originated and a second Ethernet network, e.g., the metropolitan area Ethernet network, which is to transport the encapsulating packet. When the encapsulating packet would exceed the allowable Ethernet packet length, the original packet may be split up at the interface between the first and second network and the resulting parts encapsulated into two encapsulating packets.

Apparatus and method of detecting a fault in a network service includes an Ethernet access network domain in which a heartbeat message is broadcast at a periodic interval by each of a plurality of edge devices associated with an instance of the network service. Each of the edge devices also receives the heartbeat messages broadcast at the periodic interval from other edge devices. A fault occurrence is identified when the edge device fails to receive an expected heartbeat message at the periodic interval from one of the other edge devices.

A method of routing packets in network system where the network system comprises a plurality of edge nodes and a plurality of core nodes. Selected core nodes are coupled to communicate with selected edge nodes. The network system also comprises a plurality of external nodes, with selected external nodes coupled to communicate with selected edge nodes, and where different external nodes are associated with a plurality of different entities sharing resources on the network system. The method comprises proposing a set of entities from the plurality of different entities. The proposed set comprises entities associated with external nodes that share respective connections to a number of edge nodes in the edge nodes such that the shared number is less than a total number of all edge nodes to which each different entity in the set is connected, with other aspects then taken with respect to the proposed set.

A servo driver synchronized method based on Ether CAT real-time Ethernet comprises the steps as follows: a slave station link layer control module requests a synchronous interruption to an application layer control module while a distribution clock is triggered; the application layer control module calculates interrupt response time delay delta t1 while entering into the synchronous interruption every time, calculates Tset = TOffset + (Tc-delta t1) while entering into the synchronous interruption for the first time, wherein Tset represents next time of initiating servo interruption after the application layer control module receives a synchronous interruption request for the first time, and TOffset represents time deviation between the next time of initiating servo interruption and time of receiving the synchronous interruption request after the application layer control module receives the synchronous interruption request, and the application layer control module adjusts timing cycle of a servo program which enters into the synchronous interruption for the first time and recovering the timing cycle of other servo programs to normal in a first communication period. The servo driver synchronized method of the invention avoids the conflicts between data updating and a servo application program, and synchronously updates and executes servo control data.

An E-Tree is disclosed which includes a root node associated with a Metro Ethernet network. The E-Tree includes a first Virtual Bridge (VB), associated with the root node, which is configured to process Ethernet traffic, and a second node associated with the Metro Ethernet network. The E-Tree includes a second VB, associated with the second node, configured to process Ethernet traffic and having a first connection between the first VB and the second VB. The second VB is configured to be able to send Ethernet traffic to the first VB via the first connection, if appropriate. In the event there is a second connection between the second VB and a third VB and the second connection has been assigned a down direction from the point of view of the second VB, the second VB is not permitted to send traffic received from the second connection to another connection which from the point of view of the second VB has been assigned a down direction.

The invention discloses a packet forwarding method and a PE-AGG device. The method comprises the steps that: the PE-AGG device is equipped with a virtual port list used for storing the one-to-one corresponding relationship between PW signs and virtual port signs and also a logic interface information list for storing the corresponding relationship between logic interfaces and service types disposed on the logic interfaces. After receiving a packet from the user terminal, the PE-AGG device, according to the PW sign corresponding to the packet, searches in the virtual port list to acquire the corresponding virtual port sign and also the VLAN sign corresponding to the acquired virtual port sign; according to the acquired virtual port sign and VLAN sign, the PE-AGG device searches in the logic interface information list to acquire corresponding type information on the service; and according to the acquired service type information, the PE-AGG device carries out three-level forwarding treatment on the first packet. The technical proposal of the invention can reduce the construction cost of metro Ethernet.

An intelligently controlling method for realizing city Ethernet switch-board access safety integrates functions of certificating user legality, exerting illegal agent proof of legal user, controlling P2P flow rate and DHCP SNOOP together in said method for controlling and monitoring user in order to raise safety of network.

The invention discloses one method and system for one city zone Ethernet reliability process, which comprises the following steps: establishing one virtual router redundant agreement set by two business control gates and separately establishing interface device and virtual router agreement gate connection through virtual special local net; according to the process results, determining virtual router main backup business control gate and establishes business control gate and interface for process.

The disclosed Ethernet edge bridge comprises a bridging member including a US port, a NS port and a transmission entity. It also discloses a MAN system including a user bridge network and a provider backbone network. Wherein, the user bridge network connects with the backbone network, and the latter connects with each other through the bridge network. This invention also discloses the method for providing service on edge of the MAN, which comprises: the user bridge network accesses with the US port of MAC-in-MAC edge bridge; the US port builds mapping table between the virtual user ID and provider business, and the MAC-in-MAC edge bridge completes the business mapping or port mapping according to data message and mapping relation.

In one embodiment, a technique for detecting a break in a pseudowire and automatic shutting down user network interface (UNI) ports affected by the break is provided. In response to the loss of connectivity on the shut down ports, customer edge devices may automatically switch over to redundant circuits (e.g., other UNI ports not affected by the break in the pseudowire) and establish a different pseudowire.

The utility model discloses a router which is used for the multi cast message transmission in the local Ethernet based on the 802.1 ah protocol, wherein, the local Ethernet comprises at least two routers and an exchanger. Under the situation of normal network link, one of the routers, as an assigned router, is used to process and forward the multi cast current transmit by the core network to the exchanger; the other router, as an end-to-end assigned and back-up router, is used to detect the network link; when the fault of the network link is detected by the back-up router, the assigned router is used to process and forward the multi cast current transmit by the core network to the exchanger. The utility model also discloses the router application and 802.1 ah protocol-based implementation system and the method of multi cast in the local Ethernet. The utility model has the advantages of initiating the multi cast business practically, making sure the fast restoring of multi cast business and improving the reliability of network transmission.

An intelligent electronic device segregates urgent data frames from non-urgent data frames on reception so that the urgent data frames may be handled with greater priority. A switching device is disposed between an external network interface and multiple internal network ports. Based on a network data type indicia, urgent data frames are routed to one of the ports, and non-urgent data frames are routed to another port. A processor coupled to the internal network ports handles urgent data frames before handling any non-urgent data frames.

The invention used for realizing the ATM simulation of ATM network in Metro Network. Based on PW mapping technology, the invention provides a switching method between ATM cell and Ethernet frame and its relevant format; To-MAN IWF (InterWorking function) completes the works of packaging ATM cell into the Ethernet frame; To-ATM IWF completes the work of the recombining the ATM cell in the Ethernet frame information.

An Ethernet local management interface (E-LMI) protocol for use at a user-to-network interface (UNI) of a Metro Ethernet Network (MEN) is disclosed. The E-LMI protocol allows configuration and status information for the services at the UNI to be transferred from the MEN to a customer edge device coupled to the MEN at the UNI. Various embodiments involve sending or receiving a message via a User-to-Network Interface (UNI) of a Metro Ethernet Network (MEN). A customer edge device extracts configuration and status information for the services at the UNI from a received message. The configuration and status information can correspond to a multipoint Ethernet Virtual Connection (EVC).

The present invention relates to an operator edge equipment, a Metro Ethernet access network, and the data processing method. The method comprises: a network side data is received from a set interface; a UPE enquiries an ARP table, to obtain a destination MAC address; the data is packaged by the destination MAC address for sending. The equipment comprises a data receiving module, a data sending module, a reception requesting module, a table establishment module, a judging module, an enquiry module and a packaging module; the metro Ethernet access network comprises a network side-oriented operator edge equipment and a user side-oriented operator edge equipment, wherein a network side data receiving module, an interface judging module and a network side data sending module are arranged on the network side-oriented operator edge equipment. The proposal avoids the focus conservation of the ARP table of the Metro Ethernet total network users, and improves the network expandability and the handling capacity of the NPE.

A method for providing service at edge of metropolitan area Ethernet includes connecting user bridge network based on C-VLAN to user edge port of MAC-in-MAC edge network bridge, setting up mapping relation table of virtual user ID to operation firm service based on user edge Ethernet port of MAC-in-MAC edge network bridge, identifying data message by MAC-in-MAC edge network bridge and finalizing service example mapping or outlet port mapping according to said mapping relation.

The invention relates to a transmission control method of the multimedia data, in particular to a congestion control method based on the jitter measurement in the metro Ethernet network. The method utilizes the priority bit position of the C-VLAN Tag of the Q-in-Q the metro Ethernet network as the counter of the node time delay jitter. The accumulated time delay jitter of the multimedia data frame in the transmission process from end to end is followed. The data of the small jitter corresponds to the higher priority and the data of the higher jitter corresponds to the lower priority. The Ethernet data frame, the jitter value of which is larger than the user tolerate threshold value, is lost by the determination of the user tolerate threshold value. The invention can effectively reduce the average time delay jitter of the multimedia flow, which can improve the good throughput of the multimedia service and the service quality of the multimedia service.

A protocol indiscriminate edge device and method for supporting multiple diverse enterprise needs is disclosed. Supported enterprise services may include e.g., traditional PBXs, IP-PBXs, SIP phones, H.323 terminals, etc. In addition, one or more carrier inputs such as TDM, metro-Ethernet, cable, DSL, wireless, etc. may be accepted with the edge device and method. In one aspect, the device comprises one or more input modules, one or more output modules, and a processor. The processor includes a protocol aggregator and bridge operable to translate, manage and direct a plurality of concurrent data streams to multiple customers. In addition, the processor may optionally include a real time database to dynamically configure input and / or output data streams in real time and on-the-fly. The edge device is advantageous in that it allows carriers to support multiple diverse customers through a common access point.

Apparatus and method of detecting a fault in a network service includes an Ethernet access network domain in which a heartbeat message is broadcast at a periodic interval by each of a plurality of edge devices associated with an instance of the network service. Each of the edge devices also receives the heartbeat messages broadcast at the periodic interval from other edge devices. A fault occurrence is identified when the edge device fails to receive an expected heartbeat message at the periodic interval from one of the other edge devices.

A method of operation for a provider edge device of a core network includes receiving a customer frame from an access network; the customer frame having a first Virtual Local Area Network (VLAN) tag of a first predetermined bit length. The first VLAN tag including a service instance identifier. The service instance identifier of the first VLAN tag is then mapped into a second VLAN tag of a second predetermined bit length greater than the first predetermined bit length.

A method (20) of routing packets in network system (10). The network system comprises a plurality of edge nodes (ENx) and a plurality of core nodes (CNx). Selected core nodes are coupled to communicate with selected edge nodes. The network system also comprises a plurality of external nodes (CSTa,b) external from the edge nodes, with selected external nodes coupled to communicate with selected edge nodes in the plurality of edge nodes, and where different external nodes in the plurality of external nodes are associated with a plurality of different entities sharing resources on the network system. The method comprises a step (30) of proposing a set of entities from the plurality of different entities. The proposed set comprises entities associated with external nodes that share respective connections to a number of edge nodes in the plurality of edge nodes such that the shared number is less than a total number of all edge nodes to which each different entity in the set is connected, with other aspects then taken with respect to the proposed set.

Embodiments of the present invention disclose a packet processing method and system. In the method in the embodiment of the present invention, because a root node configures different control VLANs for any two rings that have an adjacent edge in an area, different control VLANs are used to transmit a protocol packet in a ring that has its own control VLAN configured. The method and system may be applied to a ring network of a metro Ethernet to provide multi-path protection and implement rapid convergence of service switchover. In addition, a network topology structure is not limited to a network topology with a single ring or only two intersecting points, and may be applied to all network topology situations.

A method for an Ethernet to bear ATM cells includes: mapping the ATM virtual connection information in the first ATM cell received from the ATM network to an Interworking Identifier (IW ID); combining the IW ID and the cell payload of the first ATM cell into an Ethernet frame; and transmitting the Ethernet frame in an Ethernet network. An apparatus for an Ethernet to bear ATM cells is also disclosed. The embodiments of the present invention implement network interworking on the data link layer (layer 2) and enable an ATM network to perform ATM emulation in a metropolitan area Ethernet (MEN) independently of the upper-layer protocol, thus facilitating the user.

The invention discloses a method for monitoring the performance of metro Ethernet. The method comprises traffic statistics of an Ethernet port and statistics based on the SLA flow. When the monitoring is carried out on the traffic statistics of the Ethernet port, connection between the ports of two interchangers is ensured firstly, and then the monitoring function is carried out globally and the flow statistics function of the Ethernet port is achieved under the connected ports. When monitoring is carried out on the statistics based on the SLA flow, normal communication between the two interchangers based on Y.1731 is ensured firstly, and then the monitoring function is carried out globally and the statistics function based on the SLA flow is achieved in the SLA mode. Finally, corresponding statistics results are displayed according to minimum statistics time intervals respectively. The method for monitoring the performance of the metro Ethernet achieves organic integration of the interchangers and an Ethernet performance testing meter, is capable of carrying out long-time online monitoring on performance indexes of the Ethernet such as port flow statistics property, time delay, delay variation and packet loss probability, has an Ethernet performance index ultralimit network management warning function, and has guiding significance for effective management and maintenance of the metro Ethernet.

The invention provides a method and a device for transmitting service quality information in a QinQ Metro Ethernet. The method comprises the following steps: A, creating a PCP domain and a DE domain of a S-VLAN in the direction of an NNI output port of a PE node, acquiring the VLAN_ID of S-VLAN according to the mapping relationship between a flow domain and S-VLAN tag, generating S-VLAN information according to the created PCP domain and the created DE domain at last, and adding the S-VLAN information to the position of an outer layer VLAN of a message; and B, acquiring information on the flow domain in the direction of the NNI input port of a P node or the PE node according to the mapping relationship between the flow domain and the S-VLAN tag, determining a Qos grade and color mark of a service flow by using the PCP domain and the DE domain of the S-VLAN, sending the message to a designated scheduling queue and forwarding the message at the PE node. The method and the device can allow the message to ensure uniform Qos information during transmission.

The invention discloses a master station system of a controller real-time Ethernet EtherCAT. An implementation method of the maser station of the controller real-time Ethernet EtherCAT includes the following steps: integrating a comX protocol board card, and realizing driving of comX; realizing configuration of a protocol stack, and ensuring the EtherCAT master station to work normally; realizing initialization of a slave station, and ensuring an EtherCAT bus to work normally; and realizing receiving and sending of period data, and ensuring control of the slave station by the master station. The system includes a controller and a comX protocol board card; and the comX protocol board card is integrated on the controller. According to the master station system provided by the invention, hard real-time response time of the master station is improved from hardware, and the problem in the prior art that real-time performance of a master station is affected due to adoption of soft protocol stacks of operating systems such as Windows, Android and Linux.