CN103200467A - Device and method for transmitting network element protocol messages in optical network equipment - Google Patents
Device and method for transmitting network element protocol messages in optical network equipment Download PDFInfo
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Abstract
The invention discloses a device and a method for transmitting network element protocol messages in optical network equipment, and relates to the field of photo-communication. The device for transmitting the messages comprises seven hardware entity units: an ECC message aggregation and separation unit, an ECC frame and ether OAM frame converting unit, a packet interface adaptive unit, a packet switching unit, an ECC frame and HDLC frame converting unit, an OTN interface adaptive unit and an OTN framing unit, the device for transmitting the messages is positioned on one side of a back plate, and a control and management unit is arranged on the other side of the back plate. By application of the device and the method for transmitting the network element protocol messages in the optical network equipment, ECC messages of packet services and OTN services in the optical network equipment can be transmitted according to a uniform standard, and after the processing of all service units, the ECC information is transmitted to far-end equipment through service ports of different types.
Description
Technical field
The present invention relates to optical communication field, particularly relate to network element protocol massages transfer device and method in a kind of optical network device.
Background technology
ECC(Embedded Control Channel in the optical-fiber network, the embedded Control channel) be to transmit OAM(Operation Administration and Maintenance, operation, management, maintenance) logic channel of information, the ECC protocol stack is with OSI(Open System Interconnect, open system interconnection) reference model is the basis, the application layer of ECC protocol stack comprises CMISE(Common Management Information Service Element, public administration information service unit), support the ROSE(Remote Operation Service Element of CMICE, remote operation service element) and ACSE(Association Control Service Element, jointly control service unit).Presentation layer, session layer and transport layer provide support ROSE and the required connection-oriented service of ACSE.Wherein transport layer also comprises the Additional Agreement unit, makes by CLNP(ConnectionLess Network Protocol, connectionless network protocol) can provide the connection mode service during operation.Data link layer adopt Q.920 and Q.921 in the LAPD(Link Access Program D of defined, D channel link joining procedure).The operation of ECC protocol stack in communication network need provide the physical channel to transmit the ECC message.
Optical network device ECC message transmission design need be satisfied full packetizing system and full OTN(Optical Transport Network, optical transfer network) system ECC message delivery request.Full packetizing system adopts ether OAM frame to transmit the ECC message, and the OTN system adopts OTUk(Optical Transport Unit k, k optical transport unit, k is positive integer) the GCCx(General Communication Channel x of expense, x comprehensive communication channel, x are positive integer) passage transmits the ECC message, and message is PPP(Point-to-Point Protocol, point-to-point protocol) encapsulation is not the ether encapsulated message.And the control and management unit is unique in the equipment of OTN and grouping fusion, need to support simultaneously grouping and OTN business, just there is a technical problem in this, the EMU(Element Management Unit that the control and management unit sends, the NE management dish) message, for packet switch unit, need be converted to Ethernet message, be delivered to remote equipment from the packet circuit interface with the form of ether OAM message.Becoming frame unit for OTN, need be converted to the PPP message, from OTU(Optical Transport Unit, optical transport unit) the expense interface is delivered to remote equipment.But present optical network device can't mix the ECC message that transmits different-format simultaneously.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned background technology, network element protocol massages transfer device and method in a kind of optical network device are provided, the ECC message of the inner Packet Service of optical network device and OTN business can adopt unified standard to transmit, after each business unit is handled respectively, ECC information is delivered to remote equipment by dissimilar functional areas.
Network element protocol massages transfer device in the optical network device provided by the invention, comprise 7 hardware entities unit: ECC message convergence and separative element, ECC frame and ether OAM frame converting unit, the packet interface adaptation unit, packet switch unit, ECC frame and HDLC frame converting unit, OTN interface adaptation unit, OTN becomes frame unit, this message transfer device is positioned at a side of backboard, the opposite side of backboard is provided with the control and management unit, ECC message convergence and separative element respectively with the control and management unit, ECC frame and ether OAM frame converting unit, ECC frame and HDLC frame converting unit, packet switch unit, OTN becomes frame unit to link to each other, the ECC frame links to each other with packet switch unit by the packet interface adaptation unit with ether OAM frame converting unit, and the ECC frame becomes frame unit to link to each other by OTN interface adaptation unit with OTN with HDLC frame converting unit;
Described ECC message convergence and separative element are used for: the ECC message that the ECC message that packet side is sent and OTN side are sent mixes, and is sent to the control and management unit; From the code stream of backboard side serial, recover ethernet frame, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and the ECC frame format of grouping the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit;
Described ECC frame and ether OAM frame converting unit are used for: the ECC message that the backboard side is sent adds the MPLS encapsulation, forms ether OAM message, is sent to the packet interface adaptation unit; And from ether OAM frame, parse the ECC frame, be sent to ECC message convergence and separative element;
Described packet interface adaptation unit is used for: the ECC message data that the backboard side is sent carries out parallel serial conversion, according to the interface requirement of packet switch unit, forms the interface signal that packet switch unit requires, and is sent to packet switch unit; The data that packet switch unit is sent are carried out serial to parallel conversion, form accessible ether OAM frame, be sent to ECC frame and ether OAM frame converting unit;
Described packet switch unit is used for: ether OAM message and data message are converged, send from the packet circuit mouth; The service message that separation receives from the packet circuit mouth, the FPGA that ether OAM message is sent to the packet interface adaptation unit handles, and data message is sent to corresponding service port;
Described ECC frame and HDLC frame converting unit are used for: parse the PPP frame from the HDLC frame, the PPP frame is packaged into ethernet frame, when PPP frame during less than 40 bytes, fill " 0x00 " byte; From the ECC frame, parse the PPP frame, if the message EtherType value of PPP frame is 0x55BB, then according to the RFC1662 related request, the PPP frame is packaged into the HDLC frame, send to OTN interface adaptation unit; Otherwise abandon this message and carry out error statistics;
Described OTN interface adaptation unit is used for: at the serial code stream from OTUk expense GCCx passage, carry out HDLC and decide frame, recover the HDLC frame, and carry out corresponding CRC check, the number of statistics HDLC frame; The HDLC frame is carried out and goes here and there variation, rate adapted, the mode of HDLC frame with serial code stream is inserted in the GCCx expense passage of OTN interface adaptation unit, deliver to OTN and become frame unit;
Described OTN becomes frame unit, is used for: the GCCx overhead data that OTN interface adaptation unit is passed over places the GCCx expense passage of OTN, produces new OTN framing message data, sends from OTN circuit mouth.
On the basis of technique scheme, the hardware using communication bus form layout of described message transfer device is carried original APS APS, APS overhead byte S1, alarm overhead bus simultaneously; By the switch on the control and management unit, realize the transmission topology of ECC Overhead according to MAC Address, pat surface information by ECC passage transfer tube, adopt the form of message to transmit the ECC Overhead, realize that point is to multiple expense transfer modes such as multiple spot, point-to-point, multipoint-to-points; Adopt ether OAM message to transmit the ECC information of equipment room in the packet circuit, adopt OTN mode transfer tube to pat surface information in the OTN circuit based on the grouping POTS equipment of optical transfer network, adopt the GCCx channel interface in the OTUk expense to transmit the ECC message.
On the basis of technique scheme, the Ethernet message that described packet circuit dorsulum side is sent comprises internal layer MAC, VLAN tag types, VLAN label, IP type, IP field and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, and the MPLS message that send in the line side comprises Ethernet message and the CRC check position that outer MAC, MPLS tag types, control word, backboard side are sent; The Ethernet message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; Packet switch unit as payload, is loaded into it in ether OAM message and sends from the packet circuit mouth after receiving the Ethernet message that the backboard side sends; The message ectomesoderm MAC Address of line interface is determined by packet switch unit.
On the basis of technique scheme, the message that described OTN circuit dorsulum side is sent comprises internal layer MAC, VLAN tag types, VLAN label, PPP tag types, PPP frame length, PPP payload, filling and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, the PPP frame that send in the line side comprises address, control word, protocol type and PPP payload, add PPP frame period mark in the front, address, add CRC check position and PPP frame period mark in PPP payload back, just constituted the HDLC frame; The message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; After OTN became the message that frame unit receives that the backboard side sends, therefrom taking out payload was the PPP message, is loaded into the GCC passage of OTU interface, sends from OTN circuit mouth.
On the basis of technique scheme, described OTN interface adaptation unit is carried out HDLC and is decided frame by detecting PPP frame period mark.
It is a kind of based on the network element protocol massages transmission method in the optical network device of above-mentioned message transfer device that the present invention also provides, and may further comprise the steps:
In packet circuit, from backboard toward the packet circuit side direction: ECC message convergence and separative element recover ethernet frame from the code stream of backboard side serial, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and the ECC frame format of grouping the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit; The ECC message that ECC frame and ether OAM frame converting unit are sent the backboard side adds the MPLS encapsulation, forms ether OAM message, is sent to the packet interface adaptation unit; The ECC message data that the packet interface adaptation unit is sent the backboard side carries out parallel serial conversion, according to the interface requirement of packet switch unit, forms the interface signal that packet switch unit requires, and is sent to packet switch unit; Packet switch unit: ether OAM message and data message are converged, send from the packet circuit mouth;
In packet circuit, from the packet circuit side to the backboard direction: packet switch unit separates the service message that receives from the packet circuit mouth, and ether OAM message is sent to the packet interface adaptation unit, and data message is sent to corresponding service port; The packet interface adaptation unit carries out serial to parallel conversion to the data that packet switch unit is sent, and forms accessible ether OAM frame, is sent to ECC frame and ether OAM frame converting unit; ECC frame and ether OAM frame converting unit parse the ECC frame from ether OAM frame, be sent to ECC message convergence and separative element; The ECC message that the ECC message that ECC message convergence and separative element are sent packet side and OTN side are sent mixes, and is sent to the control and management unit;
In the OTN circuit, from backboard toward OTN line side direction: ECC message convergence and separative element recover ethernet frame from the code stream of backboard side serial, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and grouping, the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit; ECC frame and HDLC frame converting unit parse the PPP frame from the ECC frame; If the message EtherType value of PPP frame is 0x55BB, then according to the RFC1662 related request, the PPP frame is packaged into the HDLC frame, send to OTN interface adaptation unit; Otherwise abandon this message and carry out error statistics; OTN interface adaptation unit is carried out by the HDLC frame and string changes and rate adapted, with the mode of HDLC frame with serial code stream, is inserted in the GCCx expense passage of OTN interface adaptation unit, delivers to OTN and becomes frame unit; The GCCx overhead data that OTN becomes frame unit that OTN interface adaptation unit is passed over places the GCCx expense passage of OTN, produces new OTN framing message data, sends from OTN circuit mouth;
In the OTN circuit, from the OTN line side to the backboard direction: OTN interface adaptation unit is at the serial code stream from OTUk expense GCCx passage, carries out HDLC and decide frame, recovers HDLC and carries out corresponding CRC check, adds up the number of HDLC frame; ECC frame and HDLC frame converting unit parse the PPP frame from the HDLC frame, the PPP frame is packaged into ethernet frame, send to ECC message convergence and separative element, and when PPP frame during less than 40 bytes, it is fixed to fill " 0x00 " byte; The ECC message that the ECC message that ECC message convergence and separative element are sent packet side and OTN side are sent mixes, and is sent to the control and management unit.
On the basis of technique scheme, the Ethernet message that described packet circuit dorsulum side is sent comprises internal layer MAC, VLAN tag types, VLAN label, IP type, IP field and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, and the MPLS message that send in the line side comprises Ethernet message and the CRC check position that outer MAC, MPLS tag types, control word, backboard side are sent; The Ethernet message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; Packet switch unit as payload, is loaded into it in ether OAM message and sends from the packet circuit mouth after receiving the Ethernet message that the backboard side sends; The message ectomesoderm MAC Address of line interface is determined by packet switch unit.
On the basis of technique scheme, the message that described OTN circuit dorsulum side is sent comprises internal layer MAC, VLAN tag types, VLAN label, PPP tag types, PPP frame length, PPP payload, filling and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, the PPP frame that send in the line side comprises address, control word, protocol type and PPP payload, add PPP frame period mark in the front, address, add CRC check position and PPP frame period mark in PPP payload back, just constituted the HDLC frame; The message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; After OTN became the message that frame unit receives that the backboard side sends, therefrom taking out payload was the PPP message, is loaded into the GCC passage of OTU interface, sends from OTN circuit mouth.
On the basis of technique scheme, described OTN interface adaptation unit is carried out HDLC and is decided frame by detecting PPP frame period mark.
Compared with prior art, advantage of the present invention is as follows:
The present invention designs a kind of general ECC Ethernet message for the ECC message transmission between control and management unit and each business unit, on the equipment of Packet Service and OTN integrated services, regardless of the business unit type, the ECC information of control and management unit can both be delivered on each business unit by unified ECC message, be provided with special message processing module (MPM) in the business unit, the payload of ECC message is taken out, the payload content of ECC message changes along with different cell types, when cell type is packet switch unit, payload is ether OAM frame, and packet switch unit is delivered to remote equipment with ether OAM frame; When cell type was OTN one-tenth frame unit, payload was the PPP encapsulated message, and OTN becomes frame unit that the PPP encapsulated message is delivered to remote equipment by the GCCx passage in the OTUk expense.Therefore, the ECC message of the inner Packet Service of optical network device and OTN business can transmit with unified standard, avoid the original ECC message of the professional use of Packet Service and OTN to transmit standard, cause the ECC message of optical network device inside to transmit skimble-scamble problem, after each business unit is handled respectively, ECC information is delivered to remote equipment by dissimilar functional areas.
Description of drawings
Fig. 1 is the structured flowchart of network element protocol massages transfer device in the embodiment of the invention.
Fig. 2 is the message format schematic diagram of the ECC channel transfer between control and management unit and the packet switch unit in the embodiment of the invention.
Fig. 3 is the message format schematic diagram that the control and management unit becomes the ECC channel transfer between the frame unit in the embodiment of the invention with OTN.
Fig. 4 is that the ECC of packet circuit in the embodiment of the invention handles schematic diagram.
Fig. 5 is that the ECC of OTN circuit in the embodiment of the invention handles schematic diagram.
Embodiment
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Referring to shown in Figure 1, the embodiment of the invention provides the transfer device of the network element protocol massages in a kind of optical network device, comprise 7 hardware entities unit: ECC message convergence and separative element, ECC frame and ether OAM frame converting unit, the packet interface adaptation unit, packet switch unit, ECC frame and HDLC frame converting unit, OTN interface adaptation unit, OTN becomes frame unit, this message transfer device is positioned at a side of backboard, the opposite side of backboard is provided with the control and management unit, ECC message convergence and separative element respectively with the control and management unit, ECC frame and ether OAM frame converting unit, ECC frame and HDLC frame converting unit, packet switch unit, OTN becomes frame unit to link to each other, the ECC frame links to each other with packet switch unit by the packet interface adaptation unit with ether OAM frame converting unit, and the ECC frame becomes frame unit to link to each other by OTN interface adaptation unit with OTN with HDLC frame converting unit.
ECC message convergence and separative element are used for: the ECC message that the ECC message that packet side is sent and OTN side are sent mixes, and is sent to the control and management unit; From the code stream of backboard side serial, recover ethernet frame, and carry out relevant FCS(Frame Check Sequence, frame check field) checking treatment; According to the ECC frame format of OTN and the ECC frame format of grouping the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit.
ECC frame and ether OAM frame converting unit, be used for: according to frame format shown in Figure 2, the ECC message that the backboard side is sent adds MPLS(Multi-Protocol Label Switching, multiprotocol label switching) encapsulation, form ether OAM message, be sent to the packet interface adaptation unit; According to frame format shown in Figure 2, from ether OAM frame, parse the ECC frame, be sent to ECC message convergence and separative element.
The packet interface adaptation unit is used for: the ECC message data that the backboard side is sent carries out parallel serial conversion, according to the interface requirement of packet switch unit, forms the interface signal that packet switch unit requires, and is sent to packet switch unit; The data that packet switch unit is sent are carried out serial to parallel conversion, form accessible ether OAM frame, be sent to ECC frame and ether OAM frame converting unit.
Packet switch unit is used for: ether OAM message and data message are converged, send from the packet circuit mouth; The service message that separation receives from the packet circuit mouth is sent to the FPGA(Field-Programmable Gate Array of packet interface adaptation unit, field programmable gate array with ether OAM message) handle, data message is sent to corresponding service port.
ECC frame and HDLC frame converting unit are used for: according to frame format shown in Figure 3, from HDLC(High level Data Link Control, High-Level Data Link Control) parse the PPP frame in the frame, the PPP frame is packaged into ethernet frame subsequently; When PPP frame during less than 40 bytes, need fill (byte of padding is decided to be " 0x00 "), to satisfy minimum ethernet frame length (64Byte) requirement; According to frame format shown in Figure 3 and PPP frame length value thereof, from the ECC frame, parse the PPP frame, if the message EtherType value of PPP frame is 0x55BB, then according to the RFC1662 related request, the PPP frame is packaged into the HDLC frame, send to OTN interface adaptation unit; Otherwise abandon this message and carry out error statistics.
OTN interface adaptation unit is used for: at the serial code stream from OTUk expense GCCx passage, carry out HDLC by frame format shown in Figure 3 and decide frame, recover HDLC and carry out corresponding CRC check and the number of statistics HDLC frame; Whether FPGA recovers the HDLC frame from this interface should be configurable; The HDLC frame is carried out and the string variation, and rate adapted, with the mode of HDLC with serial code stream, be inserted in the GCCx expense passage of OTN interface adaptation unit, to deliver to OTN and become frame unit, this process can be controlled, and whether namely be inserted among the GCCx is configurable.
OTN becomes frame unit, is used for: the GCCx overhead data that OTN interface adaptation unit is passed over places the GCCx expense passage of OTN, produces new OTN framing message data, sends from OTN circuit mouth.
The similar communication bus form of the hardware using of this message transfer device layout is carried original APS(Automatic Protection Switching, APS simultaneously), overhead bus such as APS overhead byte S1, alarm; By the switch on the control and management unit, realize the transmission topology of ECC Overhead according to MAC Address, pat surface information by ECC passage transfer tube, adopt the form of message to transmit the ECC Overhead, realize that point is to multiple expense transfer modes such as multiple spot, point-to-point, multipoint-to-points.Adopt ether OAM message to transmit the ECC information of equipment room in the packet circuit.POTS(Packet Over Transport Section is based on the grouping of optical transfer network) adopt traditional OTN mode transfer tube to pat surface information in the OTN circuit of equipment, adopt the GCCx channel interface in the OTUk expense to transmit the ECC message.
Referring to shown in Figure 2, in packet circuit, the Ethernet message that the backboard side is sent comprises internal layer MAC, VLAN tag types, VLAN label, IP type, IP field and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, and the MPLS message that send in the line side comprises Ethernet message and the CRC check position that outer MAC, MPLS tag types, control word, backboard side are sent.The Ethernet message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack.Packet switch unit as payload, is loaded into it in ether OAM message and sends from the packet circuit mouth after receiving the Ethernet message that the backboard side sends.The message ectomesoderm MAC Address of line interface is determined by packet switch unit.
Referring to shown in Figure 3, in the OTN circuit, the message that the backboard side is sent comprises internal layer MAC, VLAN tag types, VLAN label, PPP tag types, PPP frame length, PPP payload, filling and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, the PPP frame that send in the line side comprises address, control word, protocol type and PPP payload, add PPP frame period mark in the front, address, add CRC check position and PPP frame period mark in PPP payload back, just constituted the HDLC frame.The message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack.After OTN became the message that frame unit receives that the backboard side sends, therefrom taking out payload was the PPP message, is loaded into the GCC passage of OTU interface, sends from OTN circuit mouth.
The embodiment of the invention provides the transmission method of the network element protocol massages in a kind of optical network device, may further comprise the steps:
In packet circuit, from backboard toward the packet circuit side direction: ECC message convergence and separative element recover ethernet frame from the code stream of backboard side serial, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and the ECC frame format of grouping the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit; ECC frame and ether OAM frame converting unit are according to frame format shown in Figure 2, and the ECC message that the backboard side is sent adds the MPLS encapsulation, forms ether OAM message, is sent to the packet interface adaptation unit; The ECC message data that the packet interface adaptation unit is sent the backboard side carries out parallel serial conversion, according to the interface requirement of packet switch unit, forms the interface signal that packet switch unit requires, and is sent to packet switch unit; Packet switch unit: ether OAM message and data message are converged, send from the packet circuit mouth;
In packet circuit, from the packet circuit side to the backboard direction: packet switch unit separates the service message that receives from the packet circuit mouth, and ether OAM message is sent to the packet interface adaptation unit, and data message is sent to corresponding service port; The packet interface adaptation unit carries out serial to parallel conversion to the data that packet switch unit is sent, and forms accessible ether OAM frame, is sent to ECC frame and ether OAM frame converting unit; ECC frame and ether OAM frame converting unit parse the ECC frame according to frame format shown in Figure 2 from ether OAM frame, be sent to ECC message convergence and separative element; The ECC message that the ECC message that ECC message convergence and separative element are sent packet side and OTN side are sent mixes, and is sent to the control and management unit;
In the OTN circuit, from backboard toward OTN line side direction: ECC message convergence and separative element recover ethernet frame from the code stream of backboard side serial, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and grouping, the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit; ECC frame and HDLC frame converting unit parse the PPP frame according to frame format shown in Figure 3 and PPP frame length value thereof from the ECC frame; If the message EtherType value of PPP frame is 0x55BB, then according to the RFC1662 related request, the PPP frame is packaged into the HDLC frame, send to OTN interface adaptation unit; Otherwise abandon this message and carry out error statistics; OTN interface adaptation unit is carried out by the HDLC frame and string changes, and rate adapted, with the mode of HDLC with serial code stream, be inserted in the GCCx expense passage of OTN interface adaptation unit, deliver to OTN and become frame unit, this process can be controlled, and whether namely be inserted among the GCCx is configurable; The GCCx overhead data that OTN becomes frame unit that OTN interface adaptation unit is passed over places the GCCx expense passage of OTN, produces new OTN framing message data, sends from OTN circuit mouth.
In the OTN circuit, from the OTN line side to the backboard direction: OTN interface adaptation unit is at the serial code stream from OTUk expense GCCx passage, carry out HDLC by frame format shown in Figure 3 and decide frame, recover the HDLC frame, and carry out the number of corresponding CRC check, statistics HDLC frame, whether recovering the HDLC frame from this interface should be configurable; ECC frame and HDLC frame converting unit parse the PPP frame according to frame format shown in Figure 3 from the HDLC frame, the PPP frame is packaged into ethernet frame subsequently, sends to ECC message convergence and separative element; When PPP frame during less than 40 bytes, need fill (byte of padding is decided to be " 0x00 "), to satisfy minimum ethernet frame length (64Byte) requirement; The ECC message that the ECC message that ECC message convergence and separative element are sent packet side and OTN side are sent mixes, and is sent to the control and management unit.
Referring to shown in Figure 2, in packet circuit, the Ethernet message that the backboard side is sent comprises internal layer MAC, VLAN tag types, VLAN label, IP type, IP field and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, and the MPLS message that send in the line side comprises Ethernet message and the CRC check position that outer MAC, MPLS tag types, control word, backboard side are sent.The Ethernet message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack.Packet switch unit as payload, is loaded into it in ether OAM message and sends from the packet circuit mouth after receiving the Ethernet message that the backboard side sends.The message ectomesoderm MAC Address of line interface is determined by packet switch unit.
Referring to shown in Figure 3, in the OTN circuit, the message that the backboard side is sent comprises internal layer MAC, VLAN tag types, VLAN label, PPP tag types, PPP frame length, PPP payload, filling and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, the PPP frame that send in the line side comprises address, control word, protocol type and PPP payload, add PPP frame period mark in the front, address, add CRC check position and PPP frame period mark in PPP payload back, just constituted the HDLC frame.The message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack.After OTN became the message that frame unit receives that the backboard side sends, therefrom taking out payload was the PPP message, is loaded into the GCC passage of OTU interface, sends from OTN circuit mouth.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention comprises these changes and modification interior.The content that is not described in detail in this specification belongs to this area professional and technical personnel's known prior art.
Claims (9)
1. the network element protocol massages transfer device in the optical network device, it is characterized in that, comprise 7 hardware entities unit: ECC message convergence and separative element, ECC frame and ether OAM frame converting unit, the packet interface adaptation unit, packet switch unit, ECC frame and HDLC frame converting unit, OTN interface adaptation unit, OTN becomes frame unit, this message transfer device is positioned at a side of backboard, the opposite side of backboard is provided with the control and management unit, ECC message convergence and separative element respectively with the control and management unit, ECC frame and ether OAM frame converting unit, ECC frame and HDLC frame converting unit, packet switch unit, OTN becomes frame unit to link to each other, the ECC frame links to each other with packet switch unit by the packet interface adaptation unit with ether OAM frame converting unit, and the ECC frame becomes frame unit to link to each other by OTN interface adaptation unit with OTN with HDLC frame converting unit;
Described ECC message convergence and separative element are used for: the ECC message that the ECC message that packet side is sent and OTN side are sent mixes, and is sent to the control and management unit; From the code stream of backboard side serial, recover ethernet frame, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and the ECC frame format of grouping the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit;
Described ECC frame and ether OAM frame converting unit are used for: the ECC message that the backboard side is sent adds the MPLS encapsulation, forms ether OAM message, is sent to the packet interface adaptation unit; And from ether OAM frame, parse the ECC frame, be sent to ECC message convergence and separative element;
Described packet interface adaptation unit is used for: the ECC message data that the backboard side is sent carries out parallel serial conversion, according to the interface requirement of packet switch unit, forms the interface signal that packet switch unit requires, and is sent to packet switch unit; The data that packet switch unit is sent are carried out serial to parallel conversion, form accessible ether OAM frame, be sent to ECC frame and ether OAM frame converting unit;
Described packet switch unit is used for: ether OAM message and data message are converged, send from the packet circuit mouth; The service message that separation receives from the packet circuit mouth, the FPGA that ether OAM message is sent to the packet interface adaptation unit handles, and data message is sent to corresponding service port;
Described ECC frame and HDLC frame converting unit are used for: parse the PPP frame from the HDLC frame, the PPP frame is packaged into ethernet frame, when PPP frame during less than 40 bytes, fill " 0x00 " byte; From the ECC frame, parse the PPP frame, if the message EtherType value of PPP frame is 0x55BB, then according to the RFC1662 related request, the PPP frame is packaged into the HDLC frame, send to OTN interface adaptation unit; Otherwise abandon this message and carry out error statistics;
Described OTN interface adaptation unit is used for: at the serial code stream from OTUk expense GCCx passage, carry out HDLC and decide frame, recover the HDLC frame, and carry out corresponding CRC check, the number of statistics HDLC frame; The HDLC frame is carried out and goes here and there variation, rate adapted, the mode of HDLC frame with serial code stream is inserted in the GCCx expense passage of OTN interface adaptation unit, deliver to OTN and become frame unit;
Described OTN becomes frame unit, is used for: the GCCx overhead data that OTN interface adaptation unit is passed over places the GCCx expense passage of OTN, produces new OTN framing message data, sends from OTN circuit mouth.
2. the network element protocol massages transfer device in the optical network device as claimed in claim 1, it is characterized in that: the hardware using communication bus form layout of described message transfer device, carry original APS APS, APS overhead byte S1, alarm overhead bus simultaneously; By the switch on the control and management unit, realize the transmission topology of ECC Overhead according to MAC Address, pat surface information by ECC passage transfer tube, adopt the form of message to transmit the ECC Overhead, realize that point is to multiple expense transfer modes such as multiple spot, point-to-point, multipoint-to-points; Adopt ether OAM message to transmit the ECC information of equipment room in the packet circuit, adopt OTN mode transfer tube to pat surface information in the OTN circuit based on the grouping POTS equipment of optical transfer network, adopt the GCCx channel interface in the OTUk expense to transmit the ECC message.
3. the network element protocol massages transfer device in the optical network device as claimed in claim 2, it is characterized in that: the Ethernet message that described packet circuit dorsulum side is sent comprises internal layer MAC, VLAN tag types, VLAN label, IP type, IP field and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, and the MPLS message that send in the line side comprises Ethernet message and the CRC check position that outer MAC, MPLS tag types, control word, backboard side are sent; The Ethernet message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; Packet switch unit as payload, is loaded into it in ether OAM message and sends from the packet circuit mouth after receiving the Ethernet message that the backboard side sends; The message ectomesoderm MAC Address of line interface is determined by packet switch unit.
4. the network element protocol massages transfer device in the optical network device as claimed in claim 2, it is characterized in that: the message that described OTN circuit dorsulum side is sent comprises internal layer MAC, the VLAN tag types, the VLAN label, the PPP tag types, the PPP frame length, the PPP payload, fill and the CRC check position, interior layer MAC address comprises purpose MAC and source MAC, the PPP frame that send in the line side comprises the address, control word, protocol type and PPP payload, add PPP frame period mark in the front, address, add CRC check position and PPP frame period mark in PPP payload back, just constituted the HDLC frame; The message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; After OTN became the message that frame unit receives that the backboard side sends, therefrom taking out payload was the PPP message, is loaded into the GCC passage of OTU interface, sends from OTN circuit mouth.
5. the network element protocol massages transfer device in the optical network device as claimed in claim 4 is characterized in that: described OTN interface adaptation unit is carried out HDLC and is decided frame by detecting PPP frame period mark.
6. based on the network element protocol massages transmission method in the optical network device of each described message transfer device in the claim 1 to 5, it is characterized in that, may further comprise the steps:
In packet circuit, from backboard toward the packet circuit side direction: ECC message convergence and separative element recover ethernet frame from the code stream of backboard side serial, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and the ECC frame format of grouping the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit; The ECC message that ECC frame and ether OAM frame converting unit are sent the backboard side adds the MPLS encapsulation, forms ether OAM message, is sent to the packet interface adaptation unit; The ECC message data that the packet interface adaptation unit is sent the backboard side carries out parallel serial conversion, according to the interface requirement of packet switch unit, forms the interface signal that packet switch unit requires, and is sent to packet switch unit; Packet switch unit: ether OAM message and data message are converged, send from the packet circuit mouth;
In packet circuit, from the packet circuit side to the backboard direction: packet switch unit separates the service message that receives from the packet circuit mouth, and ether OAM message is sent to the packet interface adaptation unit, and data message is sent to corresponding service port; The packet interface adaptation unit carries out serial to parallel conversion to the data that packet switch unit is sent, and forms accessible ether OAM frame, is sent to ECC frame and ether OAM frame converting unit; ECC frame and ether OAM frame converting unit parse the ECC frame from ether OAM frame, be sent to ECC message convergence and separative element; The ECC message that the ECC message that ECC message convergence and separative element are sent packet side and OTN side are sent mixes, and is sent to the control and management unit;
In the OTN circuit, from backboard toward OTN line side direction: ECC message convergence and separative element recover ethernet frame from the code stream of backboard side serial, and carry out relevant FCS checking treatment; According to the ECC frame format of OTN and grouping, the ECC message is separated respectively, the ECC message of OTN is sent to OTN becomes frame unit, the ECC message of grouping is sent to packet switch unit; ECC frame and HDLC frame converting unit parse the PPP frame from the ECC frame; If the message EtherType value of PPP frame is 0x55BB, then according to the RFC1662 related request, the PPP frame is packaged into the HDLC frame, send to OTN interface adaptation unit; Otherwise abandon this message and carry out error statistics; OTN interface adaptation unit is carried out by the HDLC frame and string changes and rate adapted, with the mode of HDLC frame with serial code stream, is inserted in the GCCx expense passage of OTN interface adaptation unit, delivers to OTN and becomes frame unit; The GCCx overhead data that OTN becomes frame unit that OTN interface adaptation unit is passed over places the GCCx expense passage of OTN, produces new OTN framing message data, sends from OTN circuit mouth;
In the OTN circuit, from the OTN line side to the backboard direction: OTN interface adaptation unit is at the serial code stream from OTUk expense GCCx passage, carries out HDLC and decide frame, recovers HDLC and carries out corresponding CRC check, adds up the number of HDLC frame; ECC frame and HDLC frame converting unit parse the PPP frame from the HDLC frame, the PPP frame is packaged into ethernet frame, send to ECC message convergence and separative element, and when PPP frame during less than 40 bytes, it is fixed to fill " 0x00 " byte; The ECC message that the ECC message that ECC message convergence and separative element are sent packet side and OTN side are sent mixes, and is sent to the control and management unit.
7. the network element protocol massages transmission method in the optical network device as claimed in claim 6, it is characterized in that: the Ethernet message that described packet circuit dorsulum side is sent comprises internal layer MAC, VLAN tag types, VLAN label, IP type, IP field and CRC check position, interior layer MAC address comprises purpose MAC and source MAC, and the MPLS message that send in the line side comprises Ethernet message and the CRC check position that outer MAC, MPLS tag types, control word, backboard side are sent; The Ethernet message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; Packet switch unit as payload, is loaded into it in ether OAM message and sends from the packet circuit mouth after receiving the Ethernet message that the backboard side sends; The message ectomesoderm MAC Address of line interface is determined by packet switch unit.
8. the network element protocol massages transmission method in the optical network device as claimed in claim 6, it is characterized in that: the message that described OTN circuit dorsulum side is sent comprises internal layer MAC, the VLAN tag types, the VLAN label, the PPP tag types, the PPP frame length, the PPP payload, fill and the CRC check position, interior layer MAC address comprises purpose MAC and source MAC, the PPP frame that send in the line side comprises the address, control word, protocol type and PPP payload, add PPP frame period mark in the front, address, add CRC check position and PPP frame period mark in PPP payload back, just constituted the HDLC frame; The message format that the backboard side is sent is the reference format that the ECC message transmits between control and management unit and each business unit, and interior layer MAC address is determined by the EMU protocol stack; After OTN became the message that frame unit receives that the backboard side sends, therefrom taking out payload was the PPP message, is loaded into the GCC passage of OTU interface, sends from OTN circuit mouth.
9. the network element protocol massages transmission method in the optical network device as claimed in claim 8 is characterized in that: described OTN interface adaptation unit is carried out HDLC and is decided frame by detecting PPP frame period mark.
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