CN103036847B - A kind of convergent type protocol converter of automatic identification HDLC/GFP type user side protocol converter and receiving/transmission method thereof - Google Patents
A kind of convergent type protocol converter of automatic identification HDLC/GFP type user side protocol converter and receiving/transmission method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of convergent type protocol converter and receiving/transmission method thereof of automatic identification HDLC/GFP type user side protocol converter, and it is mainly at Ethernet data cache module and VCAT & amp; The automatic processing module of HDLC/GFP frame is provided with between LCAS module, thus achieve automatic HDLC with GFP of local side separate unit convergent type transducer and become/separate frame, and then the transmission of the E1 protocol converter information of realization and far-end multiple stage single channel, multichannel, HDLC type or GFP type, such mode can identify automatically when user side changes dissimilar protocol converter, cost performance is higher, compatibility is higher to realize one more neatly, and installation and maintenance is system more easily.
Description
Technical field
The present invention relates to a kind of convergent type protocol converter and receiving/transmission method thereof of automatic identification HDLC/GFP type user side protocol converter.
Background technology
The point-to-point association of tradition turns access scheme, open 1 Leased line, need a transducer, a netting twine to switch at general bureau's machine room, 1 2M cable is to DDF(digital distribution frame), switching again through DDF arrives transmission equipment, thus arrives user by transmission SDH network.But, along with the development of Leased line and being on the increase of machine room user side transducer, the space of Leased line hold facility machine room is increasing, the cable used and DDF also get more and more, in addition the possible breakdown point related to increases, and cannot monitor in real time transducer state, particularly transducer fall dead, there is the hidden failures such as error code in link, the difficulty of failure judgement point is strengthened.This causes a lot of inconvenience to the maintenance of Leased line.In order to address these problems, create convergent type protocol converter.Convergent type protocol converter can complete point-to-multipoint application.Whole equipment is equivalent to multiple stage legacy protocol transducer, Ethernet switch and small-sized MSTP and combines, easy for installation, farthest saves machine room space and construction, O&M cost.User side E1 protocol converter has two types at present, and one is HDLC type, and another kind is GFP type, and its topological diagram as shown in Figure 1.
As shown in Figure 2, current convergent type protocol converter is when activating the service, need the artificial topological diagram according to planning in advance, by webmaster module i.e. MCU module instruction, E1 mapping/de-mapping device by n road E1 signal map to specific n1(n=n1) in individual VC12, namely which E1 is mapped to the VC12 that certain VC12(user side protocol converter maps) in, then MCU module also will according to the protocol converter type of user side, y buffer area of instruction Ethernet data cache module and n binding, namely which region of data access source and destination region in y which road in n is final, and be HDLC by a specific z1 cache identifier, be GFP by a specific z2 cache identifier, so that z1 road signal carries out HDLC one-tenth/solution frame, z2 road signal carries out GFP one-tenth/solution frame (z1+z2=n, and 0≤z1≤y, 0≤z2≤y).After equipment is with a period of time, the protocol converter of user side damages, when replacing with the protocol converter of another type, need manually again again to be identified the respective cache district of data cache module by MCU module again, along with n is increasing, more dumb, install, O&M cost is also more and more higher.
Summary of the invention
The object of the invention is to convergent type protocol converter and the receiving/transmission method thereof of openly a kind of automatic identification HDLC/GFP type user side protocol converter, achieve automatic HDLC with GFP of local side separate unit convergent type protocol converter and become/separate frame, and then the transmission of the E1 protocol converter information of realization and far-end multiple stage single channel, multichannel, HDLC type or GFP type, cost performance is higher, compatibility is higher, and installation and maintenance is more convenient.
A convergent type protocol converter for automatic identification HDLC/GFP type user side protocol converter, mainly comprises and converges Ethernet interface unit, Ethernet data Switching Module, Ethernet data cache module, the automatic processing module of HDLC/GFP frame, VCAT & LCAS module, E1 framing/deframer, E1 mapping/de-mapping device, multiplexing demultiplexing device, serial/parallel conversion device, UFIU UMSC Fiber Interface Unit and MCU module;
Wherein, converge Ethernet interface unit: reach Ethernet data Switching Module for converting the x road signal of telecommunication to x road Ethernet data signal, or the x road Ethernet data signal transmitted by Ethernet data Switching Module converts the x road signal of telecommunication to and sends;
Ethernet data Switching Module: be divided into the transmission block that y road Ethernet data transfers to Ethernet data cache module by converging the x road Ethernet data that Ethernet interface unit sends after VLAN exchanges, or the y road Ethernet data of being come by the reception Bulk transport from Ethernet data cache module pools x road Ethernet data and reaches and converge Ethernet interface unit after VLAN exchanges;
Ethernet data cache module: comprise and send block, reception block and home block, wherein sends the y road Ethernet data that block cache Ethernet data Switching Module transmits, to carry out the signal sampling of various sample frequency; Or the data-signal that automatic for HDLC/GFP frame processing module is sent is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC/GFP;
The automatic processing module of HDLC/GFP frame: mainly comprise cache module, HDLC frame synchronization module, gfp frame synchronization module, HDLC deframer, GFP deframer, HDLC framer and GFP framer, becomes to separate frame for automatically processing HDLC/GFP; The wherein y circuit-switched data signal that exports from VCAT & LCAS module of cache module buffer memory, take out y circuit-switched data signal by HDLC frame synchronization module from cache module and carry out frame synchronization, and frame synchronization result is sent in HDLC deframer, this HDLC deframer according to frame synchronization result by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; Gfp frame synchronization module takes out y circuit-switched data signal from cache module and carries out frame synchronization, and frame synchronization result is sent in GFP deframer, this GFP deframer according to frame synchronization result by after the GFP synchronized data signal solution frame on z2 road, the data-signal on z2 road is sent in the reception block of corresponding buffer in Ethernet data cache module, and automatically the home block of these buffers is designated GFP; This HDLC framer exports z1 road HDLC frame after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module is carried out HDLC framing; This GFP framer exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block buffering of the buffer of GFP in Ethernet data cache module is carried out GFP framing, y circuit-switched data signal is exported to VCAT & LCAS module after HDLC Zheng He z2 road, this z1 road gfp frame merges, described z1+z2=n, and 0≤z1≤y, 0≤z2≤y;
VCAT & LCAS module: receive the y circuit-switched data signal that the automatic processing module of HDLC/GFP frame exports, according to the binding relationship of y and n of MCU module instruction, HDLC/GFP frame is distributed to automatically the E1 link of normal work, generate the virtual concatenation overhead on n road, the HDLC/GFP frame on y road has been assigned in the E1 link on n road; Or according to receiving the virtual concatenation overhead on the n road transmitted by E1 mapping/de-mapping device, and according to the binding relationship of y and n of MCU module instruction, the HDLC/GFP frame reassembling into y road is transferred to the cache module of the automatic processing module of HDLC/GFP frame;
E1 framing/deframer: the virtual concatenation overhead of data-signal and n road that the E1 frame deblocking on the n road transmitted by E1 mapping/de-mapping device dresses up n road delivers to VCAT & LCAS module; Or the CRC multi-frame structure that the data-signal on n road transmit VCAT & LCAS module and the virtual concatenation overhead on n road are packaged into the E1 on n road delivers to E1 mapping/de-mapping device;
E1 mapping/de-mapping device: according to the mapping relations of MCU module instruction, the n1 road VC12 frame demapping transmitted by multiplexing demultiplexing device becomes the E1 frame on n road and delivers to E1 framing/deframer, or the VC12 frame that the E1 frame on the n road transmitted by E1 framing/deframer is mapped to n1 road delivers to multiplexing demultiplexing device, described n=n1;
The VC12 frame on multiplexing demultiplexing device: Jiang Mei 63 tunnel is multiplexed into the VC4 frame on 1 tunnel, or the VC4 frame on every road is demultiplexed into the VC12 frame on 63 tunnels;
Serial/parallel conversion device: convert parallel data signal to serial data signal, or convert serial data signal to parallel data;
UFIU UMSC Fiber Interface Unit: convert serial data signal to light signal, or convert light signal to serial data signal;
MCU module: for providing mapping relations, thus n1 road VC12 frame demapping is become the E1 frame on n road by instruction E1 mapping/de-mapping device, or the E1 frame on n road is mapped to n1 road VC12 frame by instruction E1 mapping/de-mapping device; And for providing the binding relationship of y and n in Ethernet data cache module, thus the HDLC/GFP frame on y road is distributed to the E1 link of normal work by instruction VCAT & LCAS module automatically, generate the virtual concatenation overhead on n road, or instruction VCAT & LCAS module is according to the virtual concatenation overhead receiving the n road transmitted by E1 mapping/de-mapping device, reassembles into the HDLC/GFP frame on y road.
A receiving/transmission method for the convergent type protocol converter of automatic identification HDLC/GFP type user side protocol converter, comprises receiving step and forwarding step,
Receiving step: UFIU UMSC Fiber Interface Unit converts the light signal that the optical interface from SDH equipment receives to serial data signal, serial data signal is converted to parallel data signal by serial/parallel conversion device, the i.e. VC4 frame on m road, the VC4 frame on every road is demultiplexed into the VC12 frame on 63 tunnels by this multiplexing demultiplexing device, the VC4 frame on such m road just converts the VC12 frame on n1 road, wherein n1=m*63 to, n1 road VC12 frame demapping is become the E1 frame on n road by the mapping relations that E1 mapping/de-mapping device indicates according to MCU module, the virtual concatenation overhead of the data-signal and n road of the E1 frame deblocking on n road being dressed up n road by E1 framing/deframer delivers to VCAT & LCAS module, this VCAT & LCAS module is according to the virtual concatenation overhead on the n road received, and according to the binding relationship of y and n of MCU module instruction, the HDLC/GFP frame reassembling into y road is transferred to the cache module of the automatic processing module of HDLC/GFP frame, the HDLC/GFP frame taking out this y road from cache module respectively by HDLC frame synchronization module and gfp frame synchronization module carries out respective frame synchronization, and frame synchronization result is sent into HDLC/GFP deframer, wherein HDLC deframer according to frame synchronization result by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC, the data-signal on z2 road by after the GFP synchronized data signal solution frame on z2 road according to frame synchronization result, is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP by GFP deframer, y road Ethernet data signal in the reception block of Ethernet data cache module is pooled x road Ethernet data signal by Ethernet data Switching Module after VLAN exchanges, and becomes the x road signal of telecommunication to send by convergence Ethernet interface cell translation,
Forwarding step: converge Ethernet interface unit and convert the x road signal of telecommunication to x road Ethernet data signal, by Ethernet data Switching Module, the Ethernet data signal converging the x road large bandwidth that Ethernet interface unit sends is divided into the wide Ethernet data signal of y road smaller strip after VLAN exchanges, deliver to the transmission block cache of Ethernet data cache module, HDLC framer in the automatic processing module of this HDLC/GFP frame exports z1 road HDLC frame after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module is carried out HDLC framing, GFP framer exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block cache of the buffer of GFP in Ethernet data cache module is carried out GFP framing, y circuit-switched data signal is exported to VCAT & LCAS module after being merged by HDLC Zheng He z2 road, HDLC/GFP frame automatic processing module Jiang Gai z1 road gfp frame, this VCAT & LCAS module, according to the binding relationship of y and n of MCU module instruction, and according to E1 link circuit condition, automatic selection is by the HDLC/GFP frame on which road, distribute to the E1 link which road normally works, generate the virtual concatenation overhead on n road, the HDLC/GFP frame on y road has been assigned in the E1 link on n road, the virtual concatenation overhead on the data-signal on this n road and n road is packaged into the CRC multi-frame structure of the E1 on n road by E1 framing/deframer, the mapping relations indicated according to MCU module by E1 mapping/de-mapping device again, the E1 frame on n road is mapped to the VC12 frame on n1 road, the VC4 frame on 1 tunnel is multiplexed into by the VC12 frame on multiplexing demultiplexing device Jiang Mei 63 tunnel, the VC12 frame on such n1 road just converts the VC4 frame on m road to, serial/parallel conversion device is by this parallel data signal, the i.e. VC4 frame on m road, convert serial data signal to, this serial data signal is converted to light signal by UFIU UMSC Fiber Interface Unit, and be transferred to the optical interface of SDH equipment, the E1 interface conversion eventually passing through other SDH equipment on SDH ring becomes E1 Signal transmissions to the HDLC/GFP type protocol converter of user side.
The present invention discloses a kind of convergent type protocol converter and receiving/transmission method thereof of automatic identification HDLC/GFP type user side protocol converter, by the y circuit-switched data signal that the cache module buffer memory in the automatic processing module of HDLC/GFP frame exports from VCAT & LCAS module, take out this y circuit-switched data signal from cache module respectively by HDLC frame synchronization module and gfp frame synchronization module and carry out respective frame synchronization, and frame synchronization result is sent to HDLC/GFP deframer, wherein HDLC deframer according to frame synchronization result by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC, the data-signal on z2 road by after the GFP synchronized data signal solution frame on z2 road according to frame synchronization result, is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP by GFP deframer, z1 road HDLC frame is exported after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module is carried out HDLC framing by HDLC framer simultaneously, GFP framer exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block cache of the buffer of GFP in Ethernet data cache module is carried out GFP framing, thus achieve automatic HDLC with GFP of local side separate unit convergent type transducer and become/separate frame, and then realize and far-end multiple stage single channel, multichannel, the transmission of the E1 protocol converter information of HDLC type or GFP type, such mode can identify automatically when user side changes dissimilar protocol converter, realize a cost performance more neatly higher, compatibility is higher, installation and maintenance is system more easily.
Accompanying drawing explanation
Fig. 1 is traditional convergent type protocol converter topological diagram;
Fig. 2 is the block schematic illustration of traditional convergent type protocol converter;
Fig. 3 is the block schematic illustration of convergent type protocol converter of the present invention;
Fig. 4 is the block schematic illustration of the automatic processing module of HDLC/GFP frame in the present invention.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment
As shown in Figure 3, the convergent type protocol converter of a kind of automatic identification HDLC/GFP type user side protocol converter of the present invention, mainly comprises and converges Ethernet interface unit 1, Ethernet data Switching Module 2, Ethernet data cache module 3, the automatic processing module 4 of HDLC/GFP frame, VCAT(Virtual Concatenation VirtualConcatenation) & LCAS(link level topology discovery
LinkCapacityAdjustmentScheme) module 5, E1 framing/deframer 6, E1 mapping/de-mapping device 7, multiplexing demultiplexing device 8, serial/parallel conversion device 9, UFIU UMSC Fiber Interface Unit 10 and MCU module 11;
Wherein, converge Ethernet interface unit 1: reach Ethernet data Switching Module 2 for converting the x road signal of telecommunication to x road Ethernet data signal, or the x road Ethernet data signal transmitted by Ethernet data Switching Module 2 converts the x road signal of telecommunication to and sends;
Ethernet data Switching Module 2: be divided into y(x≤y by converging the x road Ethernet data that Ethernet interface unit 1 sends after VLAN exchanges) road Ethernet data transfers to the transmission block of Ethernet data cache module 3, or the y road Ethernet data of being come by the reception Bulk transport from Ethernet data cache module 3 pools x road Ethernet data and reaches convergence Ethernet interface unit 1 after VLAN exchanges, thus reaches the effect of Ethernet-Aggregation;
Ethernet data cache module 3: include and send block, receive block and home block, wherein send the y road Ethernet data that block cache Ethernet data Switching Module 2 transmits, to carry out the signal sampling of various sample frequency; Or the data-signal that automatic for HDLC/GFP frame processing module 4 is sent is sent to the reception block of corresponding buffer in Ethernet data cache module 3, and automatically the home block of these buffers is designated HDLC/GFP;
The automatic processing module 4 of HDLC/GFP frame: as shown in Figure 4, mainly comprising cache module 41, HDLC frame synchronization module 42, gfp frame synchronization module 43, HDLC deframer 44, GFP deframer 45, HDLC framer 46 and GFP framer 47, becoming to separate frame for automatically processing HDLC with GFP; The wherein y circuit-switched data signal that exports from VCAT & LCAS module 5 of cache module 41 buffer memory, take out y circuit-switched data signal by HDLC frame synchronization module 42 from cache module 41 and carry out frame synchronization, i.e. HDLCCRC School Affairs frame head location, and frame synchronization result is sent in HDLC deframer 44; Gfp frame synchronization module 43 takes out y circuit-switched data signal from cache module 41 and carries out frame synchronization, i.e. GFPCRC School Affairs frame head location, and frame synchronization result is sent in GFP deframer 45; According to frame synchronization result, this HDLC deframer 44 can determine that HDLC synchronous digital signal is z1 road, then by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module 3, and automatically the home block of these buffers is designated HDLC; According to frame synchronization result, this GFP deframer 45 can determine that GFP synchronous digital signal is z2 road, then by after the GFP synchronized data signal solution frame on z2 road, the data-signal on z2 road is sent in the reception block of corresponding buffer in Ethernet data cache module 3, and automatically the home block of these buffers is designated GFP; This HDLC framer 46 exports z1 road HDLC frame after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module 3 is carried out HDLC framing; This GFP framer 47 exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block cache of the buffer of GFP in Ethernet data cache module 3 is carried out GFP framing, y circuit-switched data signal is exported to VCAT & LCAS module 5 after HDLC Zheng He z2 road, this z1 road gfp frame merges, described z1+z2=n, and 0≤z1≤y, 0≤z2≤y;
VCAT & LCAS module 5: receive the y circuit-switched data signal that the automatic processing module 4 of HDLC/GFP frame exports, the binding relationship of y and n indicated according to MCU module 11, and according to E1 link circuit condition, automatic selection is by the HDLC/GFP frame on which road, distribute to the E1 link which road normally works, generate the virtual concatenation overhead on n road, so just the HDLC/GFP frame of y road (y VCG) be assigned to n(y<=n) in the E1 link on road; According to the virtual concatenation overhead receiving the n road transmitted by E1 mapping/de-mapping device 7, and according to the binding relationship of y and n that MCU module 11 indicates, reassembling into y(y<=n) the HDLC/GFP frame of road (y VCG) is transferred to the cache module 41 of the automatic processing module 4 of HDLC/GFP frame, and simultaneously can the wide and handle link fault of self-adjusting straps;
E1 framing/deframer 6: the virtual concatenation overhead of data-signal and n road that the E1 frame deblocking on the n road transmitted by E1 mapping/de-mapping device 7 dresses up n road delivers to VCAT & LCAS module 5; Or the CRC multi-frame structure that the data-signal on n road transmit VCAT & LCAS module 5 and the virtual concatenation overhead on n road are packaged into the E1 on n road delivers to E1 mapping/de-mapping device 7;
E1 mapping/de-mapping device 7: the mapping relations indicated according to MCU module 11, the n1 road VC12 frame demapping transmitted by multiplexing demultiplexing device 8 becomes the E1 frame on n road and delivers to E1 framing/deframer 6, or the VC12 frame that the E1 frame on the n road transmitted by E1 framing/deframer 6 is mapped to n1 road delivers to multiplexing demultiplexing device 8, described n=n1;
The VC12 frame on multiplexing demultiplexing device 8: Jiang Mei 63 tunnel is multiplexed into the VC4 frame on 1 tunnel, or the VC4 frame on every road is demultiplexed into the VC12 frame on 63 tunnels;
Serial/parallel conversion device 9: convert parallel data signal to serial data signal, or convert serial data signal to parallel data;
UFIU UMSC Fiber Interface Unit 10: convert serial data signal to light signal, or convert light signal to serial data signal;
MCU module 11: for providing mapping relations, thus n1 road VC12 frame demapping is become the E1 frame on n road by instruction E1 mapping/de-mapping device 7, or the E1 frame on n road is mapped to n1 road VC12 frame by instruction E1 mapping/de-mapping device 7; And for providing the binding relationship of y and n in Ethernet data cache module 3, thus the HDLC/GFP frame on y road is distributed to the E1 link of normal work by instruction VCAT & LCAS module 5 automatically, generate the virtual concatenation overhead on n road, or instruction VCAT & LCAS module 5 is according to the virtual concatenation overhead receiving the n road transmitted by E1 mapping/de-mapping device, reassembles into the HDLC/GFP frame on y road.
A receiving/transmission method for the convergent type protocol converter of automatic identification HDLC/GFP type user side protocol converter, comprises receiving step and forwarding step:
Wherein receiving step: UFIU UMSC Fiber Interface Unit 10 converts the light signal that the optical interface from SDH equipment receives to serial data signal, serial data signal is converted to parallel data signal by serial/parallel conversion device 9, the i.e. VC4 frame on m road, the VC4 frame on every road is demultiplexed into the VC12 frame on 63 tunnels by this multiplexing demultiplexing device 8, the VC4 frame on such m road just converts n1(n1=m*63 to) the VC12 frame on road, n1 road VC12 frame demapping is become the E1 frame on n road by the mapping relations that E1 mapping/de-mapping device 7 indicates according to MCU module 11, the virtual concatenation overhead of the data-signal and n road of the E1 frame deblocking on n road being dressed up n road by E1 framing/deframer 6 delivers to VCAT & LCAS module 5, this VCAT & LCAS module 5 is according to the virtual concatenation overhead on the n road received, and according to the binding relationship of y and n that MCU module 11 indicates, reassembling into y(y<=n) the HDLC/GFP frame of road (y VCG) is transferred to the cache module 41 of the automatic processing module 4 of HDLC/GFP frame, the HDLC/GFP frame taking out this y road from cache module 41 respectively by HDLC frame synchronization module 42 and gfp frame synchronization module 43 carries out respective frame synchronization, and frame synchronization result is sent into HDLC/GFP deframer, wherein HDLC deframer 44 according to frame synchronization result by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module 3, and automatically the home block of these buffers is designated HDLC, the data-signal on z2 road by after the GFP synchronized data signal solution frame on z2 road according to frame synchronization result, is sent in the reception block of the corresponding buffer of Ethernet data cache module 3, and automatically the home block of these buffers is designated GFP by GFP deframer 45, y road Ethernet data signal in the reception block of Ethernet data cache module 3 is pooled x(x≤y by Ethernet data Switching Module 2 after VLAN exchanges) road Ethernet data signal, thus reaching the effect of Ethernet-Aggregation, this convergence Ethernet interface unit 1 converts x road Ethernet data signal to the x road signal of telecommunication and sends,
Forwarding step: converge Ethernet interface unit 1 and convert the x road signal of telecommunication to x road Ethernet data signal, by Ethernet data Switching Module 2, the Ethernet data signal converging the x road large bandwidth that Ethernet interface unit 1 sends is divided into y(x≤y after VLAN exchanges) the wide Ethernet data signal of road smaller strip, deliver to the transmission block cache of Ethernet data cache module 3, HDLC framer 46 in the automatic processing module 4 of this HDLC/GFP frame exports z1 road HDLC frame after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module 3 is carried out HDLC framing, GFP framer 47 exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block cache of the buffer of GFP in Ethernet data cache module 3 is carried out GFP framing, y circuit-switched data signal is exported to VCAT & LCAS module 5 after being merged by HDLC Zheng He z2 road, HDLC/GFP frame automatic processing module 4 Jiang Gai z1 road gfp frame, the binding relationship of y and n that this VCAT & LCAS module 5 indicates according to MCU module 11, and according to E1 link circuit condition, automatic selection is by the HDLC/GFP frame on which road, distribute to the E1 link of the normal work on which road, generate the virtual concatenation overhead on n road, so just the HDLC/GFP frame of y road (y VCG) is assigned to n(y<=n) in the E1 link on road, the virtual concatenation overhead on the data-signal on this n road and n road is packaged into the CRC multi-frame structure of the E1 on n road by E1 framing/deframer 6, the mapping relations that E1 mapping/de-mapping device 7 indicates according to MCU module 11, the E1 frame on n road is mapped to the VC12 frame on n1 road, the VC4 frame on 1 tunnel is multiplexed into by the VC12 frame on multiplexing demultiplexing device 8 Jiang Mei 63 tunnel, the VC12 frame on such n1 road just converts m(m=n1/63 to) the VC4 frame on road, serial/parallel conversion device 9 is by this parallel data signal, the i.e. VC4 frame on m road, convert serial data signal to, this serial data signal is converted to light signal by UFIU UMSC Fiber Interface Unit 10, and be transferred to the optical interface of SDH equipment, the E1 interface conversion eventually passing through other SDH equipment on SDH ring becomes E1 Signal transmissions to the HDLC/GFP type protocol converter of user side.
Spirit of the present invention is: between Ethernet data cache module and VCAT & LCAS module, be provided with the automatic processing module of HDLC/GFP frame, by the y circuit-switched data signal that the cache module buffer memory in the automatic processing module of HDLC/GFP frame exports from VCAT & LCAS module, take out this y circuit-switched data signal from cache module respectively by HDLC frame synchronization module and gfp frame synchronization module and carry out respective frame synchronization, and frame synchronization result is sent to HDLC/GFP deframer, wherein HDLC deframer according to frame synchronization result by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC, the data-signal on z2 road by after the GFP synchronized data signal solution frame on z2 road according to frame synchronization result, is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP by GFP deframer, z1 road HDLC frame is exported after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module is carried out HDLC framing by HDLC framer simultaneously, GFP framer exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block cache of the buffer of GFP in Ethernet data cache module is carried out GFP framing, thus achieve automatic HDLC with GFP of local side separate unit convergent type transducer and become/separate frame, and then realize and far-end multiple stage single channel, multichannel, the transmission of the E1 protocol converter information of HDLC type or GFP type, such mode can identify automatically when user side changes dissimilar protocol converter, realize a cost performance more neatly higher, compatibility is higher, installation and maintenance is system more easily.
The above, it is only present pre-ferred embodiments, not technical scope of the present invention is imposed any restrictions, thus every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (2)
1. automatically identify a convergent type protocol converter for HDLC/GFP type user side protocol converter, it is characterized in that: mainly comprise and converge Ethernet interface unit, Ethernet data Switching Module, Ethernet data cache module, the automatic processing module of HDLC/GFP frame, VCAT & LCAS module, E1 framing/deframer, E1 mapping/de-mapping device, multiplexing demultiplexing device, serial/parallel conversion device, UFIU UMSC Fiber Interface Unit and MCU module;
Wherein, converge Ethernet interface unit: reach Ethernet data Switching Module for converting the x road signal of telecommunication to x road Ethernet data signal, or the x road Ethernet data signal transmitted by Ethernet data Switching Module converts the x road signal of telecommunication to and sends;
Ethernet data Switching Module: be divided into the transmission block that y road Ethernet data transfers to Ethernet data cache module by converging the x road Ethernet data that Ethernet interface unit sends after VLAN exchanges, or the y road Ethernet data of being come by the reception Bulk transport from Ethernet data cache module pools x road Ethernet data and reaches and converge Ethernet interface unit after VLAN exchanges;
Ethernet data cache module: comprise and send block, reception block and home block, wherein sends the y road Ethernet data that block cache Ethernet data Switching Module transmits, to carry out the signal sampling of various sample frequency; Or the data-signal that automatic for HDLC/GFP frame processing module is sent is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC/GFP;
The automatic processing module of HDLC/GFP frame: mainly comprise cache module, HDLC frame synchronization module, gfp frame synchronization module, HDLC deframer, GFP deframer, HDLC framer and GFP framer, becomes to separate frame for automatically processing HDLC/GFP; The wherein y circuit-switched data signal that exports from VCAT & LCAS module of cache module buffer memory, take out y circuit-switched data signal by HDLC frame synchronization module from cache module and carry out frame synchronization, and frame synchronization result is sent in HDLC deframer, according to frame synchronization result, this HDLC deframer can determine that HDLC synchronous digital signal is z1 road, then by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; Gfp frame synchronization module takes out y circuit-switched data signal from cache module and carries out frame synchronization, and frame synchronization result is sent in GFP deframer, according to frame synchronization result, this GFP deframer can determine that GFP synchronous digital signal is z2 road, then by after the GFP synchronized data signal solution frame on z2 road, the data-signal on z2 road is sent in the reception block in Ethernet data cache module in corresponding buffer, and automatically the home block of these buffers is designated GFP; This HDLC framer exports z1 road HDLC frame after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module is carried out HDLC framing; This GFP framer exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block buffering of the buffer of GFP in Ethernet data cache module is carried out GFP framing, y circuit-switched data signal is exported to VCAT & LCAS module after HDLC Zheng He z2 road, this z1 road gfp frame merges, described z1+z2=n, and 0≤z1≤y, 0≤z2≤y;
VCAT & LCAS module: receive the y circuit-switched data signal that the automatic processing module of HDLC/GFP frame exports, according to the binding relationship of y and n of MCU module instruction, HDLC/GFP frame is distributed to automatically the E1 link of normal work, generate the virtual concatenation overhead on n road, the HDLC/GFP frame on y road has been assigned in the E1 link on n road; Or according to receiving the virtual concatenation overhead on the n road transmitted by E1 mapping/de-mapping device, and according to the binding relationship of y and n of MCU module instruction, the HDLC/GFP frame reassembling into y road is transferred to the cache module of the automatic processing module of HDLC/GFP frame;
E1 framing/deframer: the virtual concatenation overhead of data-signal and n road that the E1 frame deblocking on the n road transmitted by E1 mapping/de-mapping device dresses up n road delivers to VCAT & LCAS module; Or the CRC multi-frame structure that the data-signal on n road transmit VCAT & LCAS module and the virtual concatenation overhead on n road are packaged into the E1 on n road delivers to E1 mapping/de-mapping device;
E1 mapping/de-mapping device: according to the mapping relations of MCU module instruction, the n1 road VC12 frame demapping transmitted by multiplexing demultiplexing device becomes the E1 frame on n road and delivers to E1 framing/deframer, or the VC12 frame that the E1 frame on the n road transmitted by E1 framing/deframer is mapped to n1 road delivers to multiplexing demultiplexing device, described n=n1;
The VC12 frame on multiplexing demultiplexing device: Jiang Mei 63 tunnel is multiplexed into the VC4 frame on 1 tunnel, or the VC4 frame on every road is demultiplexed into the VC12 frame on 63 tunnels;
Serial/parallel conversion device: convert parallel data signal to serial data signal, or convert serial data signal to parallel data;
UFIU UMSC Fiber Interface Unit: convert serial data signal to light signal, or convert light signal to serial data signal;
MCU module: for providing mapping relations, thus n1 road VC12 frame demapping is become the E1 frame on n road by instruction E1 mapping/de-mapping device, or the E1 frame on n road is mapped to n1 road VC12 frame by instruction E1 mapping/de-mapping device; And for providing the binding relationship of y and n in Ethernet data cache module, thus the HDLC/GFP frame on y road is distributed to the E1 link of normal work by instruction VCAT & LCAS module automatically, generate the virtual concatenation overhead on n road, or instruction VCAT & LCAS module is according to the virtual concatenation overhead receiving the n road transmitted by E1 mapping/de-mapping device, reassembles into the HDLC/GFP frame on y road.
2. the receiving/transmission method of the convergent type protocol converter of a kind of automatic identification HDLC/GFP type user side protocol converter according to claim 1, comprises receiving step and forwarding step, it is characterized in that:
Receiving step: UFIU UMSC Fiber Interface Unit converts the light signal that the optical interface from SDH equipment receives to serial data signal, serial data signal is converted to parallel data signal by serial/parallel conversion device, the i.e. VC4 frame on m road, the VC4 frame on every road is demultiplexed into the VC12 frame on 63 tunnels by this multiplexing demultiplexing device, the VC4 frame on such m road just converts the VC12 frame on n1 road, wherein n1=m*63 to, n1 road VC12 frame demapping is become the E1 frame on n road by the mapping relations that E1 mapping/de-mapping device indicates according to MCU module, the virtual concatenation overhead of the data-signal and n road of the E1 frame deblocking on n road being dressed up n road by E1 framing/deframer delivers to VCAT & LCAS module, this VCAT & LCAS module is according to the virtual concatenation overhead on the n road received, and according to the binding relationship of y and n of MCU module instruction, the HDLC/GFP frame reassembling into y road is transferred to the cache module of the automatic processing module of HDLC/GFP frame, the HDLC/GFP frame taking out this y road from cache module respectively by HDLC frame synchronization module and gfp frame synchronization module carries out respective frame synchronization, and frame synchronization result is sent into HDLC/GFP deframer, wherein HDLC deframer according to frame synchronization result by after the HDLC synchronized data signal solution frame on z1 road, the data-signal on z1 road is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC, the data-signal on z2 road by after the GFP synchronized data signal solution frame on z2 road according to frame synchronization result, is sent in the reception block of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP by GFP deframer, y road Ethernet data signal in the reception block of Ethernet data cache module is pooled x road Ethernet data signal by Ethernet data Switching Module after VLAN exchanges, and becomes the x road signal of telecommunication to send by convergence Ethernet interface cell translation,
Forwarding step: converge Ethernet interface unit and convert the x road signal of telecommunication to x road Ethernet data signal, by Ethernet data Switching Module, the Ethernet data signal converging the x road large bandwidth that Ethernet interface unit sends is divided into the wide Ethernet data signal of y road smaller strip after VLAN exchanges, deliver to the transmission block cache of Ethernet data cache module, HDLC framer in the automatic processing module of this HDLC/GFP frame exports z1 road HDLC frame after z1 the Ethernet data signal identifying the transmission block cache of the buffer of HDLC in Ethernet data cache module is carried out HDLC framing, GFP framer exports z2 road gfp frame after z2 the Ethernet data signal identifying the transmission block cache of the buffer of GFP in Ethernet data cache module is carried out GFP framing, y circuit-switched data signal is exported to VCAT & LCAS module after being merged by HDLC Zheng He z2 road, HDLC/GFP frame automatic processing module Jiang Gai z1 road gfp frame, the binding relationship of y and n that this VCAT & LCAS module indicates according to MCU module, and according to E1 link circuit condition, automatic selection is by the HDLC/GFP frame on which road, distribute to the E1 link which road normally works, generate the virtual concatenation overhead on n road, the HDLC/GFP frame on y road has been assigned in the E1 link on n road, the virtual concatenation overhead on the data-signal on this n road and n road is packaged into the CRC multi-frame structure of the E1 on n road by E1 framing/deframer, the mapping relations indicated according to MCU module by E1 mapping/de-mapping device again, the E1 frame on n road is mapped to the VC12 frame on n1 road, the VC4 frame on 1 tunnel is multiplexed into by the VC12 frame on multiplexing demultiplexing device Jiang Mei 63 tunnel, the VC12 frame on such n1 road just converts the VC4 frame on m road to, serial/parallel conversion device is by this parallel data signal, the i.e. VC4 frame on m road, convert serial data signal to, this serial data signal is converted to light signal by UFIU UMSC Fiber Interface Unit, and be transferred to the optical interface of SDH equipment, the E1 interface conversion eventually passing through other SDH equipment on SDH ring becomes E1 Signal transmissions to the HDLC/GFP type protocol converter of user side.
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| CN104393962A (en) * | 2014-12-12 | 2015-03-04 | 成都朗锐芯科技发展有限公司 | Multi-way E1 deframing system |
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