47 results about "PWE3" patented technology

The present invention relates to PWE3-based communication and discloses a method of implementing PWE3 protocol, with the aim to implement PWE3 architecture over RPR-based MPLS PSN, provide protection and bandwidth sharing capability, and improve quality and efficiency of PWE3 architecture. Said method of implementing PWE3 protocol comprises the following steps: A. Encapsulate data frame on said PWE3 PSN layer into RPR data frame; B. Transmit said RPR data frame to the destination node through RPR; C. Decapsulate said RPR data frame into PSN layer data frame at said destination node.

The present invention relates to the field of network communications. An Optical Line Terminal (OLT) allocates a Pseudo Wire (PW) label of an access segment PW for a port, and establishes a corresponding relationship between the port information and the PW label; and carries the corresponding relationship between the port information and the PW label in a label management message, and sends the label management message to an Optical Network Unit (ONU) so that the ONU updates a forwarding table, in which the label management message adopts an access network management protocol. As a consequence, a problem of supporting Pseudo Wire Emulation Edge-to-Edge (PWE3) on a data plane of an access segment of an access network is solved under the conditions that device complexity of the ONU is not increased and a configuration of the ONU is slightly changed.

Systems and methods for sinking port mirrored from one or more identified flows of data to any node in a network are provided. Moreover, the network is configured to convey the mirrored data to the sink, without the need for any facilities expressly dedicated for this purpose. The present invention removes the requirement to co-locate the sink port within the same logical node. The present invention uses a mirrored flow configured as a provisioned layer two point-to-point connection, such as a Switched Permanent Virtual Circuit (SPVC), Pseudo-Wire (PWE3), a Virtual Local Area Network (VLAN) cross-connect, Provider Backbone Bridging—Traffic Engineering (PBB-TE), and the like. The node with the mirrored port is configured to create copies of the appropriate set of packets (i.e., ingress, egress packets, or both based on provisioning and based on the identified flow), and to forward the packets to the sink port through the provisioned point-to-point connection.

The invention discloses a PWE3 (Pseudo-Wire Emulation Edge to Edge) device and a method for reading and writing data in a jitter buffer of the device. The method comprises the steps as follows: setting cycles at intervals, counting residual data amount in the jitter buffer, and obtaining a statistics PDV (path delay value) according to the residual data amount and a TDM (time division multiplexing) business data rate V; ensuring the difference value between the statistics PDV and the current PDV, decreasing the current PDV according to a set step width if the absolute value of the difference value is larger than a set threshold value and the difference value is negative, and increasing the current PDV according to the set step width if the absolute value of the difference value is larger than the set threshold value and the difference value is positive; and determining data amount PDVt according to the TDM business data rate V and the current PDV, and starting to read data from the jitter buffer after data is started to be written in the jitter buffer and until the data amount reaches PDVt. According to the embodiment of the invention, the PDV used for reading and writing jitter buffer data is adjusted dynamically according to a specific step width, so that the balance between delay and packet loss can be realized effectively.

The invention discloses a data transmission and processing method and a data transmission and processing device for eliminating data burst caused by massive lost packet compensation through pseudo wire emulation edge to edge (PWE3) equipment and smoothing the read-write bandwidth utilization rate of an external synchronous dynamic random access memory (SDRAM) so as to improve the integral processing performance of a chip. The data transmission and processing method comprises the following steps of: when data packet loss happens on a time division multiplexing over IP (TDMoIP) data packet transmission channel, recording the TDMoIP data packet transmission channel of the data packet loss; and when the SDRAM is idle, performing data packet compensation on the TDMoIP data packet transmission channel of the data packet loss, and sending the compensated data packets to the SDRAM for processing.

The invention discloses a device for end-to-end pseudowire emulation access, and also discloses a method for the end-to-end pseudowire emulation access. The method comprises the steps of: after a local PE receives non-Ethernet data sent by a local user, performing encapsulation of an inner-layer PWE3 frame format; performing the encapsulation of an outer-layer L2VPN frame format on the encapsulated data, and then sending the encapsulated data to an opposite-end PE; and after the local PE receives the data sent by the opposite-end PE, executing decapsulation of the outer-layer L2VPN frame format and the inner-layer PWE3 frame format sequentially, and then sending the non-Ethernet data acquired by decapsulation twice to the local user. The device and the method can realize the end-to-end pseudowire emulation access on non-Ethernet under the condition of saving PE label space, and prevent PW labels from being exchanged for multiple times.

Core of the invention is conversion module of private MAC address and conversion module of public MAC address in Ethernet exchange equipment. When MPLS message enters into Ethernet exchange equipment, the Ethernet exchange equipment packages the message with private MAC address, and forwards the message to the port corresponding to destination public MAC address based on private MAC address so as to realize forwarding MPLS message through Ethernet exchange equipment. Thus, on second layer and / or third layer of Ethernet exchange chip, the invention also can support multiple operations including PWE3, L2VPN and MPLS flux engineering etc. based on MPLS.

Systems and methods for sinking port mirrored from one or more identified flows of data to any node in a network are provided. Moreover, the network is configured to convey the mirrored data to the sink, without the need for any facilities expressly dedicated for this purpose. The present invention removes the requirement to co-locate the sink port within the same logical node. The present invention uses a mirrored flow configured as a provisioned layer two point-to-point connection, such as a Switched Permanent Virtual Circuit (SPVC), Pseudo-Wire (PWE3), a Virtual Local Area Network (VLAN) cross-connect, Provider Backbone Bridging-Traffic Engineering (PBB-TE), and the like. The node with the mirrored port is configured to create copies of the appropriate set of packets (i.e., ingress, egress packets, or both based on provisioning and based on the identified flow), and to forward the packets to the sink port through the provisioned point-to-point connection.

The present invention provides a method and device for realizing edge-to-edge pseudowire simulation. In the uplink process and downlink process, a multi-protocol label switching processing card is set. The label switching message is forwarded to the processing card; the processing card encapsulates the switching message into a data message in an edge-to-edge pseudowire emulation format, and switches the message to the switching chip; during the downlink process, the switching chip Forwarding the received external MPLS message to the processing card; the processing card encapsulates the data message in the exchange message into the internal MPLS message, and encapsulates the switched The message is switched to the switch chip. The invention adds a processing card, so that the PWE3 service is realized on the IP-DSLAM, and after the internal MPLS message is switched to the switch chip of the main control board, the MPLS message can guarantee that the user access circuit information will not be lost.

An architecture for providing service mediation in a network having a Layer-2 domain and an MPLS domain includes at least one Layer-2 provider edge device in communication with a first customer site; at least one Layer-2 edge device in communication with the Layer-2 provider edge device; at least one MPLS mediation edge device in communication with the Layer-2 edge device; and at least: one MPLS provider edge device in communication with both the MPLS mediation edge device and a second customer site. An end-to-end connection is established using native Layer-2 signaling, if any, in the Layer-2 domain and PWE3 signaling protocols in the MPLS domain. The MPLS mediation edge device resolves associations between Layer-2 edge devices and MPLS provider edge devices. The service is “mediated” in the sense that native Layer-2 signaling is terminated at the MME, and a new domain, i.e., pseudowire, is established across the MPLS domain.

The present invention relates to the field of network communications. An Optical Line Terminal (OLT) allocates a Pseudo Wire (PW) label of an access segment PW for a port, and establishes a corresponding relationship between the port information and the PW label; and carries the corresponding relationship between the port information and the PW label in a label management message, and sends the label management message to an Optical Network Unit (ONU) so that the ONU updates a forwarding table, in which the label management message adopts an access network management protocol. As a consequence, a problem of supporting Pseudo Wire Emulation Edge-to-Edge (PWE3) on a data plane of an access segment of an access network is solved under the conditions that device complexity of the ONU is not increased and a configuration of the ONU is slightly changed.

A method for realizing failure detection comprises the steps of receiving a virtual circuit connectivity verification VCCV-PING message which carries transmitting terminal state information; analyzing the VCCV-PING message, judging whether the transmitting terminal has a failure according to the transmitting terminal state information, and locally setting failure identification when the transmitting terminal has a failure. An embodiment of the invention further provides a device and a system for realizing the failure detection. As the VCCV-PING message is the basic OAM requirement of PWE3, using the extended VCCV-PING message to realize the failure detection is capable of supporting the whole network to realize network failure detection, realizing complete operation mapping, and reducing system realization complexity, development cost and maintenance cost.

The invention discloses a method for realizing time division multiplex (TDM) data transmission. The method comprises the following steps of: transforming a TDM data of a physical layer sent by a local user to a data of a link layer, judging a format of the data of the link layer and performing a corresponding pretreatment operation on the data of the link layer having different formats, PW packaging the pretreated data having different formats, sending to an opposite terminal PE after adding a PW label, paring an outer PW label of a PW packet sent by the opposite terminal PE, judging the format of the data in the PW packet, performing a corresponding de-capsulation operation on the PW packet according to different data formats, transforming the de-capsulated data having different formats into the corresponding data of the link layer, and transforming into the TDM data of the physical layer and then sending to the local user. The invention also discloses a device for realizing time division multiplex (TDM) data transmission. The method and the device of the invention can realize imitating the TDM service on PSN and can further improve the function of the current PWE3 system.

The present disclosure provides an apparatus and a method for PWE3 access. The method includes: after receiving non-Ethernet data transmitted by a local user, a local PE performs inner layer PWE3 frame format encapsulation and an outer layer L2VPN frame format encapsulation on the non-Ethernet data in sequence, and then transmits the encapsulated data to an opposite PE; after receiving the data transmitted by the opposite PE, the local PE performs an outer layer L2VPN frame format de-encapsulation and an inner layer PWE3 frame format de-encapsulation on the date in sequence, and then transmits, to the local user, the non-Ethernet data obtained after the two de-encapsulations. The present disclosure can implement the pseudo wire emulation edge-to-edge access for non-Ethernet with saving label space of the PE, and can avoid multiple exchanges of Pseudo Wire (PW) labels.