CN103036847A - Convergent protocol converter and transceiving method thereof for automatically recognizing high-level data link control (HDLC)/generic framing procedure (GFP) user side protocol converters - Google Patents
Convergent protocol converter and transceiving method thereof for automatically recognizing high-level data link control (HDLC)/generic framing procedure (GFP) user side protocol converters Download PDFInfo
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Abstract
The invention discloses a convergent protocol converter and a transceiving method thereof for automatically recognizing high-level data link control (HDLC)/generic framing procedure (GFP) user side protocol converters. An HDLC/GFP automatic processing module is arranged between an ethernet data-caching module and a virtual concatenate (VCAT) and link capacity adjustment scheme (LCAS) module, thereby automatic HDLC and GFP framing/deframing of a local side single convergent converter is achieved, the transmission of information with multiple far-end single way, multiple ways, HDLC type or GFP type E1 protocol converters is achieved, by means of the mode, the automatic identification can be performed when the user side changes different types of protocol converters, and a system which is high in cost performance ratio and compatibility and convenient to install and maintain can be flexibly achieved.
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 transfers into scheme, open 1 data special line, need a transducer, a netting twine to switch at general bureau's machine room, 1 2M cable is to the DDF(digital distribution frame), switching through DDF arrives transmission equipment again, thereby arrives the user by transmission SDH network.Yet, 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 that uses and DDF are also more and more, the possible breakdown point that in addition relates to increases, and state, particularly transducer that can't the Real Time Monitoring transducer fall dead, there are the hidden failures such as error code in link, so that the difficulty of failure judgement point strengthens.This has caused a lot of inconvenience for the maintenance of Leased line.In order to address these problems, produced the convergent type protocol converter.The convergent type protocol converter can be finished point-to-multipoint application.Whole equipment is equivalent to many legacy protocol transducers, Ethernet switch and small-sized MSTP and combines, and is easy for installation, farthest saved machine room space and construction, O﹠M cost.User side E1 protocol converter has two types at present, and a kind of is the HDLC type, and another kind is the GFP type, and its topological diagram as shown in Figure 1.
As shown in Figure 2, present convergent type protocol converter is when activating the service, need the artificial topological diagram good according in advance planning, by the namely MCU module indication of webmaster module, E1 mapping/de-mapping device with n road E1 signal map to specific n1(n=n1) among the individual VC12, be which E1 is mapped to the VC12 that certain VC12(user side protocol converter shines upon) in, then the MCU module also will be according to the protocol converter type of user side, y buffer area and the n of indication Ethernet data cache module bind, be final which zone of data access source and destination zone in y, which road among the n, and a specific z1 buffer is designated HDLC, a specific z2 buffer is designated GFP, so that carrying out HDLC, z1 road signal becomes/separates frame, z2 road signal carries out GFP and becomes/separate 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 the respective cache district of data cache module to be identified again by the MCU module again, along with n is increasing, just more dumb, install, O﹠M cost is also more and more higher.
Summary of the invention
The object of the invention is to disclose a kind of convergent type protocol converter and receiving/transmission method thereof of automatic identification HDLC/GFP type user side protocol converter, realized that the automatic HDLC of local side separate unit convergent type protocol converter becomes/separate frame with GFP, and then the transmission of the E1 protocol converter information of realization and many single channel of far-end, multichannel, HDLC type or GFP type, cost performance is higher, compatibility is higher, and installation and maintenance is more convenient.
A kind of convergent type protocol converter of 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, VCAT﹠amp; LCAS module, E1 framing/deframer, E1 mapping/de-mapping device, multiplexing demultiplexing device, serial/parallel transducer, UFIU UMSC Fiber Interface Unit and MCU module;
Wherein, converge the Ethernet interface unit: be used for converting the x road signal of telecommunication to x road Ethernet data signal and reach the Ethernet data Switching Module, the x road Ethernet data signal that perhaps the Ethernet data Switching Module is transmitted converts the x road signal of telecommunication to and sends;
The Ethernet data Switching Module: will converge x road Ethernet data that the Ethernet interface unit sends and be divided into the transmission piece that y road Ethernet data transfers to the Ethernet data cache module after through the VLAN exchange, the y road Ethernet data that perhaps will transmit from the reception piece of Ethernet data cache module pools x road Ethernet data after through the VLAN exchange and reaches and converge the Ethernet interface unit;
Ethernet data cache module: comprise sending piece, reception piece and home block, wherein send the y road Ethernet data that block cache Ethernet data Switching Module transmits, in order to carry out the signal sampling of various sample frequencys; The data-signal of perhaps the automatic processing module of HDLC/GFP being sent is sent in the reception piece 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: mainly comprise cache module, HDLC frame synchronization module, gfp frame synchronization module, HDLC deframer, GFP deframer, HDLC framer and GFP framer, be used for automatically processing HDLC/GFP and become to separate frame; Wherein the cache module buffer memory is from VCAT﹠amp; The y circuit-switched data signal of LCAS module output, take out y circuit-switched data signal by the HDLC frame synchronization module from cache module and carry out frame synchronization, and the frame synchronization result sent in the HDLC deframer, this HDLC deframer according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; The gfp frame synchronization module takes out y circuit-switched data signal from cache module and carries out frame synchronization, and the frame synchronization result sent in the GFP deframer, this GFP deframer according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of corresponding buffer in the Ethernet data cache module, and automatically the home block of these buffers is designated GFP; This HDLC framer carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module to export z1 road HDLC frame after the HDLC framing; This GFP framer carries out z2 Ethernet data signal of the transmission block buffering of the buffer of sign GFP in the Ethernet data cache module to export z2 road gfp frame after the GFP framing, and output y circuit-switched data signal was to VCAT﹠amp after this z1 road HDLC frame and z2 road gfp frame merged; The LCAS module;
VCAT﹠amp; LCAS module: the y circuit-switched data signal that receives the automatic processing module output of HDLC/GFP, according to the y of MCU module indication and the binding relationship of n, the HDLC/GFP frame is distributed to automatically the E1 link of normal operation, 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; Perhaps basis receives the virtual concatenation overhead on the n road of being transmitted by E1 mapping/de-mapping device, and according to the y of MCU module indication and the binding relationship of n, the HDLC/GFP frame that reassembles into the y road is transferred to the cache module of the automatic processing module of HDLC/GFP;
E1 framing/deframer: the E1 frame deblocking on the n road that E1 mapping/de-mapping device is transmitted dresses up the data-signal on n road and the virtual concatenation overhead on n road is delivered to VCAT﹠amp; The LCAS module; Perhaps with VCAT﹠amp; The data-signal on the n road that the LCAS module transmits and the virtual concatenation overhead on n road are packaged into the CRC multi-frame structure of the E1 on n road and deliver to E1 mapping/de-mapping device;
E1 mapping/de-mapping device: according to the mapping relations of MCU module indication, the n1 road VC12 frame solution that multiplexing demultiplexing device is transmitted is mapped to the E1 frame on n road and delivers to E1 framing/deframer, and the E1 frame on the n road of perhaps E1 framing/deframer being transmitted is mapped to the VC12 frame on n1 road and delivers to multiplexing demultiplexing device;
Multiplexing demultiplexing device: the VC12 frame with per 63 tunnel is multiplexed into 1 tunnel VC4 frame, and perhaps the VC4 frame with every road demultiplexes into 63 tunnel VC12 frame;
Serial/parallel transducer: with parallel data signal transformed into serial data signal, perhaps convert serial data signal to parallel data;
UFIU UMSC Fiber Interface Unit: convert serial data signal to light signal, perhaps with light signal transformed into serial data signal;
MCU module: be used for providing mapping relations, thereby indication E1 mapping/de-mapping device is mapped to n1 road VC12 frame solution the E1 frame on n road, or indicates E1 mapping/de-mapping device that the E1 frame on n road is mapped to n1 road VC12 frame; And the binding relationship that is used for providing Ethernet data cache module y and n, thereby indication VCAT﹠amp; The LCAS module is distributed to the HDLC/GFP frame on y road the E1 link of normal operation automatically, generates the virtual concatenation overhead on n road, or indication VCAT﹠amp; The LCAS module reassembles into the HDLC/GFP frame on y road according to the virtual concatenation overhead that receives the n road of being transmitted by E1 mapping/de-mapping device.
A kind of receiving/transmission method of convergent type protocol converter of automatic identification HDLC/GFP type user side protocol converter comprises receiving step and forwarding step,
Receiving step: the light signal transformed into serial data signal that UFIU UMSC Fiber Interface Unit will receive from the optical interface of SDH equipment, convert serial data signal to parallel data signal by serial/parallel transducer, it is the VC4 frame on m road, this multiplexing demultiplexing device demultiplexes into 63 tunnel VC12 frame with the VC4 frame on every road, the VC4 frame on m road just converts the VC12 frame on n1 road, wherein n1=m*63 to like this; E1 mapping/de-mapping device is mapped to n1 road VC12 frame solution according to the mapping relations of MCU module indication the E1 frame on n road, the E1 frame deblocking on n road is dressed up the data-signal on n road and the virtual concatenation overhead on n road is delivered to VCAT﹠amp by E1 framing/deframer; The LCAS module, this VCAT﹠amp; The LCAS module is according to the virtual concatenation overhead on the n road that receives, and according to the y of MCU module indication and the binding relationship of n, the HDLC/GFP frame that reassembles into the y road is transferred to the cache module of the automatic processing module of HDLC/GFP, carry out separately frame synchronization from the HDLC/GFP frame that cache module takes out this y road respectively by HDLC frame synchronization module and gfp frame synchronization module, and the frame synchronization result is sent into the HDLC/GFP deframer; Wherein the HDLC deframer according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; The GFP deframer according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP; The Ethernet data Switching Module pools x road Ethernet data signal after the y road Ethernet data signal in the reception piece of Ethernet data cache module is exchanged through VLAN, becomes the x road signal of telecommunication to send by converging the Ethernet interface cell translation;
Forwarding step: converge the Ethernet interface unit and convert the x road signal of telecommunication to x road Ethernet data signal, the Ethernet data signal that will be converged the large bandwidth in x road that the Ethernet interface unit sends by the Ethernet data Switching Module is divided into the Ethernet data signal of the less bandwidth in y road after through the VLAN exchange, deliver to the transmission block cache of Ethernet data cache module, the HDLC framer in the automatic processing module of this HDLC/GFP carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module to export z1 road HDLC frame after the HDLC framing; The GFP framer carries out z2 Ethernet data signal of the transmission block cache of the buffer of sign GFP in the Ethernet data cache module to export z2 road gfp frame after the GFP framing, by the automatic processing module of HDLC/GFP this z1 road HDLC frame and z2 road gfp frame is merged rear output y circuit-switched data signal to VCAT﹠amp; The LCAS module, this VCAT﹠amp; The LCAS module, according to the y of MCU module indication and the binding relationship of n, and according to the E1 link circuit condition, automatically select the HDLC/GFP frame with any road, distribute to the E1 link of which road normal operation, 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; E1 framing/deframer is packaged into the virtual concatenation overhead on the data-signal on this n road and n road the CRC multi-frame structure of the E1 on n road, again by the mapping relations of E1 mapping/de-mapping device according to the indication of MCU module, the E1 frame on n road is mapped to the VC12 frame on n1 road, by multiplexing demultiplexing device per 63 tunnel VC12 frame is multiplexed into 1 tunnel VC4 frame, the VC12 frame on n1 road just converts the VC4 frame on m road to like this, serial/parallel transducer is with this parallel data signal, it is the VC4 frame on m road, the transformed into serial data signal, convert this serial data signal to light signal by UFIU UMSC Fiber Interface Unit, and be transferred to the optical interface of SDH equipment, finally the E1 interface conversion through other SDH equipment on the SDH ring becomes the E1 signal to be transferred 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 cache module buffer memory in the automatic processing module of HDLC/GFP from VCAT﹠amp; The y circuit-switched data signal of LCAS module output takes out this y circuit-switched data signal from cache module respectively by HDLC frame synchronization module and gfp frame synchronization module and carries out separately frame synchronization, and the frame synchronization result is sent to the HDLC/GFP deframer; Wherein the HDLC deframer according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; The GFP deframer according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP; The HDLC framer carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module to export z1 road HDLC frame after the HDLC framing simultaneously; The GFP framer carries out z2 Ethernet data signal of the transmission block cache of the buffer of sign GFP in the Ethernet data cache module to export z2 road gfp frame after the GFP framing, thereby realized that the automatic HDLC of local side separate unit convergent type transducer becomes/separate frame with GFP, and then realization and many single channel of far-end, multichannel, the transmission of the E1 protocol converter information of HDLC type or GFP type, such mode can be identified when user side is changed dissimilar protocol converter automatically, realize that more neatly a cost performance is higher, compatibility is higher, and installation and maintenance is system more easily.
Description of drawings
Fig. 1 is traditional convergent type protocol converter topological diagram;
Fig. 2 is the framework schematic diagram of traditional convergent type protocol converter;
Fig. 3 is the framework schematic diagram of convergent type protocol converter of the present invention;
Fig. 4 is the framework schematic diagram of the automatic processing module of HDLC/GFP among the present invention.
The invention will be further described below in conjunction with the drawings and specific embodiments.
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, VCAT﹠amp; LCAS module 5, E1 framing/deframer 6, E1 mapping/de-mapping device 7, multiplexing demultiplexing device 8, serial/parallel transducer 9, UFIU UMSC Fiber Interface Unit 10 and MCU module 11;
Wherein, converge Ethernet interface unit 1: be used for converting the x road signal of telecommunication to x road Ethernet data signal and reach Ethernet data Switching Module 2, the x road Ethernet data signal that perhaps Ethernet data Switching Module 2 is transmitted converts the x road signal of telecommunication to and sends;
Ethernet data Switching Module 2: will converge x road Ethernet data that Ethernet interface unit 1 sends and be divided into that y(x≤y) the road Ethernet data transfers to the transmission piece of Ethernet data cache module 3 after through the VLAN exchange, the y road Ethernet data that perhaps will transmit from the reception piece of Ethernet data cache module 3 pools x road Ethernet data after through the VLAN exchange and reaches and converge Ethernet interface unit 1, thereby reaches the effect of Ethernet-Aggregation;
Ethernet data cache module 3: include and send piece, receive piece and home block, wherein send the y road Ethernet data that block cache Ethernet data Switching Module 2 transmits, in order to carry out the signal sampling of various sample frequencys; The data-signal of perhaps the automatic processing module 4 of HDLC/GFP being sent is sent in the Ethernet data cache module 3 the reception piece of corresponding buffer, and automatically the home block of these buffers is designated HDLC/GFP;
The automatic processing module 4 of HDLC/GFP: as shown in Figure 4, mainly comprise 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, be used for automatically processing HDLC and become to separate frame with GFP; Wherein cache module 41 buffer memorys are from VCAT﹠amp; The y circuit-switched data signal of LCAS module 5 outputs, by
HDLC frame synchronization module 42 is taken out y circuit-switched data signal from cache module 41 and is carried out frame synchronization, and namely HDLC CRC check and frame head are located, and the frame synchronization result is sent in the HDLC deframer 44; Gfp frame synchronization module 43 takes out y circuit-switched data signal from cache module 41 and carries out frame synchronization, and namely GFP CRC check and frame head are located, and the frame synchronization result is sent in the GFP deframer 45; This HDLC deframer 44 according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of Ethernet data cache module 3 corresponding buffers, and automatically the home block of these buffers is designated HDLC; This GFP deframer 45 according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of corresponding buffer in the Ethernet data cache module 3, and automatically the home block of these buffers is designated GFP; This HDLC framer 46 carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module 3 to export z1 road HDLC frame after the HDLC framing; This GFP framer 47 carries out z2 Ethernet data signal of the transmission block cache of the buffer of sign GFP in the Ethernet data cache module 3 to export z2 road gfp frame after the GFP framing, and output y circuit-switched data signal was to VCAT﹠amp after this z1 road HDLC frame and z2 road gfp frame merged; LCAS module 5;
VCAT﹠amp; LCAS module 5: the y circuit-switched data signal that receives automatic processing module 4 outputs of HDLC/GFP, according to the y of MCU module 11 indications and the binding relationship of n, and according to the E1 link circuit condition, automatically select the HDLC/GFP frame with any road, distribute to the E1 link of which road normal operation, generate the virtual concatenation overhead on n road, so just the HDLC/GFP frame of y road (y VCG) has been assigned in the E1 link on the road of n(y＜=n); According to the virtual concatenation overhead that receives the n road of being transmitted by E1 mapping/de-mapping device 7, and according to the y of MCU module 11 indications and the binding relationship of n, reassemble into that 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, simultaneously can self-adjusting straps wide and handle link fault;
E1 framing/deframer 6: the E1 frame deblocking on the n road that E1 mapping/de-mapping device 7 is transmitted dresses up the data-signal on n road and the virtual concatenation overhead on n road is delivered to VCAT﹠amp; LCAS module 5; Perhaps with VCAT﹠amp; The data-signal on the n road that LCAS module 5 transmits and the virtual concatenation overhead on n road are packaged into the CRC multi-frame structure of the E1 on n road and deliver to E1 mapping/de-mapping device 7;
E1 mapping/de-mapping device 7: according to the mapping relations of MCU module 11 indications, the n1 road VC12 frame solution that multiplexing demultiplexing device 8 is transmitted is mapped to the E1 frame on n road and delivers to E1 framing/deframer 6, and the E1 frame on the n road of perhaps E1 framing/deframer 6 being transmitted is mapped to the VC12 frame on n1 road and delivers to multiplexing demultiplexing device 8;
Multiplexing demultiplexing device 8: the VC12 frame with per 63 tunnel is multiplexed into 1 tunnel VC4 frame, and perhaps the VC4 frame with every road demultiplexes into 63 tunnel VC12 frame;
Serial/parallel transducer 9: with parallel data signal transformed into serial data signal, perhaps convert serial data signal to parallel data;
UFIU UMSC Fiber Interface Unit 10: convert serial data signal to light signal, perhaps with light signal transformed into serial data signal;
MCU module 11: be used for providing mapping relations, thereby indication E1 mapping/de-mapping device 7 is mapped to n1 road VC12 frame solution the E1 frame on n road, or indicates E1 mapping/de-mapping device 7 that the E1 frame on n road is mapped to n1 road VC12 frame; And the binding relationship that is used for providing Ethernet data cache module 3 y and n, thereby indication VCAT﹠amp; LCAS module 5 is distributed to the HDLC/GFP frame on y road the E1 link of normal operation automatically, generates the virtual concatenation overhead on n road, or indication VCAT﹠amp; LCAS module 5 reassembles into the HDLC/GFP frame on y road according to the virtual concatenation overhead that receives the n road of being transmitted by E1 mapping/de-mapping device.
A kind of receiving/transmission method of convergent type protocol converter of automatic identification HDLC/GFP type user side protocol converter comprises receiving step and forwarding step:
Receiving step wherein: the light signal transformed into serial data signal that UFIU UMSC Fiber Interface Unit 10 will receive from the optical interface of SDH equipment, convert serial data signal to parallel data signal by serial/parallel transducer 9, it is the VC4 frame on m road, this multiplexing demultiplexing device 8 demultiplexes into 63 tunnel VC12 frame with the VC4 frame on every road, the VC4 frame on m road just converts n1(n1=m*63 to like this) the VC12 frame on road, E1 mapping/de-mapping device 7 is mapped to n1 road VC12 frame solution according to the mapping relations of MCU module 11 indication the E1 frame on n road, the E1 frame deblocking on n road is dressed up the data-signal on n road and the virtual concatenation overhead on n road is delivered to VCAT﹠amp by E1 framing/deframer 6; LCAS module 5, this VCAT﹠amp; LCAS module 5 is according to the virtual concatenation overhead on the n road that receives, and according to the y of MCU module 11 indications and the binding relationship of n, reassemble into that 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, carry out separately frame synchronization from the HDLC/GFP frame that cache module 41 takes out this y road respectively by HDLC frame synchronization module 42 and gfp frame synchronization module 43, and the frame synchronization result is sent into the HDLC/GFP deframer; Wherein HDLC deframer 44 according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of Ethernet data cache module 3 corresponding buffers, and automatically the home block of these buffers is designated HDLC; GFP deframer 45 according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of Ethernet data cache module 3 corresponding buffers, and automatically the home block of these buffers is designated GFP; Ethernet data Switching Module 2 pools the road Ethernet data signal of x(x≤y) after through the VLAN exchange with the y road Ethernet data signal in the reception piece of Ethernet data cache module 3, thereby reach the effect of Ethernet-Aggregation, this converges Ethernet interface unit 1 and converts x road Ethernet data signal to the x road signal of telecommunication and send;
Forwarding step: converge Ethernet interface unit 1 and convert the x road signal of telecommunication to x road Ethernet data signal, the Ethernet data signal that will be converged the large bandwidth in x road that Ethernet interface unit 1 sends by Ethernet data Switching Module 2 is divided into the Ethernet data signal of the less bandwidth in road of y(x≤y) after through the VLAN exchange, deliver to the transmission block cache of Ethernet data cache module 3, the HDLC framer 46 in the automatic processing module 4 of this HDLC/GFP carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module 3 to export z1 road HDLC frame after the HDLC framing; GFP framer 47 carries out z2 Ethernet data signal of the transmission block cache of the buffer of sign GFP in the Ethernet data cache module 3 to export z2 road gfp frame after the GFP framing, by the automatic processing module 4 of HDLC/GFP this z1 road HDLC frame and z2 road gfp frame is merged rear output y circuit-switched data signal to VCAT﹠amp; LCAS module 5, this VCAT﹠amp; LCAS module 5 is according to the y of MCU module 11 indications and the binding relationship of n, and according to the E1 link circuit condition, automatically select the HDLC/GFP frame with any road, distribute to the E1 link of the normal operation on which road, generate the virtual concatenation overhead on n road, so just the HDLC/GFP frame of y road (y VCG) has been assigned in the E1 link on the road of n(y＜=n); E1 framing/deframer 6 is packaged into the virtual concatenation overhead on the data-signal on this n road and n road the CRC multi-frame structure of the E1 on n road, E1 mapping/de-mapping device 7 is according to the mapping relations of MCU module 11 indications, the E1 frame on n road is mapped to the VC12 frame on n1 road, by multiplexing demultiplexing device 8 per 63 tunnel VC12 frame is multiplexed into 1 tunnel VC4 frame, the VC12 frame on n1 road just converts m(m=n1/63 to like this) the VC4 frame on road, serial/parallel transducer 9 is with this parallel data signal, it is the VC4 frame on m road, the transformed into serial data signal, convert this serial data signal to light signal by UFIU UMSC Fiber Interface Unit 10, and be transferred to the optical interface of SDH equipment, finally the E1 interface conversion through other SDH equipment on the SDH ring becomes the E1 signal to be transferred to the HDLC/GFP type protocol converter of user side.
Spirit of the present invention is: at Ethernet data cache module and VCAT﹠amp; Be provided with the automatic processing module of HDLC/GFP between the LCAS module, by the cache module buffer memory in the automatic processing module of HDLC/GFP from VCAT﹠amp; The y circuit-switched data signal of LCAS module output takes out this y circuit-switched data signal from cache module respectively by HDLC frame synchronization module and gfp frame synchronization module and carries out separately frame synchronization, and the frame synchronization result is sent to the HDLC/GFP deframer; Wherein the HDLC deframer according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; The GFP deframer according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP; The HDLC framer carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module to export z1 road HDLC frame after the HDLC framing simultaneously; The GFP framer carries out z2 Ethernet data signal of the transmission block cache of the buffer of sign GFP in the Ethernet data cache module to export z2 road gfp frame after the GFP framing, thereby realized that the automatic HDLC of local side separate unit convergent type transducer becomes/separate frame with GFP, and then realization and many single channel of far-end, multichannel, the transmission of the E1 protocol converter information of HDLC type or GFP type, such mode can be identified when user side is changed dissimilar protocol converter automatically, realize that more neatly a cost performance is higher, compatibility is higher, and installation and maintenance is system more easily.
The above, it only is preferred embodiment of the present invention, be not that technical scope of the present invention is imposed any restrictions, therefore every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any trickle modification, equivalent variations and modification that above embodiment does.
Claims (2)
1. a convergent type protocol converter of automatically identifying HDLC/GFP type user side protocol converter 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, VCAT﹠amp; LCAS module, E1 framing/deframer, E1 mapping/de-mapping device, multiplexing demultiplexing device, serial/parallel transducer, UFIU UMSC Fiber Interface Unit and MCU module;
Wherein, converge the Ethernet interface unit: be used for converting the x road signal of telecommunication to x road Ethernet data signal and reach the Ethernet data Switching Module, the x road Ethernet data signal that perhaps the Ethernet data Switching Module is transmitted converts the x road signal of telecommunication to and sends;
The Ethernet data Switching Module: will converge x road Ethernet data that the Ethernet interface unit sends and be divided into the transmission piece that y road Ethernet data transfers to the Ethernet data cache module after through the VLAN exchange, the y road Ethernet data that perhaps will transmit from the reception piece of Ethernet data cache module pools x road Ethernet data after through the VLAN exchange and reaches and converge the Ethernet interface unit;
Ethernet data cache module: comprise sending piece, reception piece and home block, wherein send the y road Ethernet data that block cache Ethernet data Switching Module transmits, in order to carry out the signal sampling of various sample frequencys; The data-signal of perhaps the automatic processing module of HDLC/GFP being sent is sent in the reception piece 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: mainly comprise cache module, HDLC frame synchronization module, gfp frame synchronization module, HDLC deframer, GFP deframer, HDLC framer and GFP framer, be used for automatically processing HDLC/GFP and become to separate frame; Wherein the cache module buffer memory is from VCAT﹠amp; The y circuit-switched data signal of LCAS module output, take out y circuit-switched data signal by the HDLC frame synchronization module from cache module and carry out frame synchronization, and the frame synchronization result sent in the HDLC deframer, this HDLC deframer according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; The gfp frame synchronization module takes out y circuit-switched data signal from cache module and carries out frame synchronization, and the frame synchronization result sent in the GFP deframer, this GFP deframer according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of Ethernet data cache module in the corresponding buffer, and automatically the home block of these buffers is designated GFP; This HDLC framer carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module to export z1 road HDLC frame after the HDLC framing; This GFP framer carries out z2 Ethernet data signal of the transmission block buffering of the buffer of sign GFP in the Ethernet data cache module to export z2 road gfp frame after the GFP framing, and output y circuit-switched data signal was to VCAT﹠amp after this z1 road HDLC frame and z2 road gfp frame merged; The LCAS module;
VCAT﹠amp; LCAS module: the y circuit-switched data signal that receives the automatic processing module output of HDLC/GFP, according to the y of MCU module indication and the binding relationship of n, the HDLC/GFP frame is distributed to automatically the E1 link of normal operation, 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; Perhaps basis receives the virtual concatenation overhead on the n road of being transmitted by E1 mapping/de-mapping device, and according to the y of MCU module indication and the binding relationship of n, the HDLC/GFP frame that reassembles into the y road is transferred to the cache module of the automatic processing module of HDLC/GFP;
E1 framing/deframer: the E1 frame deblocking on the n road that E1 mapping/de-mapping device is transmitted dresses up the data-signal on n road and the virtual concatenation overhead on n road is delivered to VCAT﹠amp; The LCAS module; Perhaps with VCAT﹠amp; The data-signal on the n road that the LCAS module transmits and the virtual concatenation overhead on n road are packaged into the CRC multi-frame structure of the E1 on n road and deliver to E1 mapping/de-mapping device;
E1 mapping/de-mapping device: according to the mapping relations of MCU module indication, the n1 road VC12 frame solution that multiplexing demultiplexing device is transmitted is mapped to the E1 frame on n road and delivers to E1 framing/deframer, and the E1 frame on the n road of perhaps E1 framing/deframer being transmitted is mapped to the VC12 frame on n1 road and delivers to multiplexing demultiplexing device;
Multiplexing demultiplexing device: the VC12 frame with per 63 tunnel is multiplexed into 1 tunnel VC4 frame, and perhaps the VC4 frame with every road demultiplexes into 63 tunnel VC12 frame;
Serial/parallel transducer: with parallel data signal transformed into serial data signal, perhaps convert serial data signal to parallel data;
UFIU UMSC Fiber Interface Unit: convert serial data signal to light signal, perhaps with light signal transformed into serial data signal;
MCU module: be used for providing mapping relations, thereby indication E1 mapping/de-mapping device is mapped to n1 road VC12 frame solution the E1 frame on n road, or indicates E1 mapping/de-mapping device that the E1 frame on n road is mapped to n1 road VC12 frame; And the binding relationship that is used for providing Ethernet data cache module y and n, thereby indication VCAT﹠amp; The LCAS module is distributed to the HDLC/GFP frame on y road the E1 link of normal operation automatically, generates the virtual concatenation overhead on n road, or indication VCAT﹠amp; The LCAS module reassembles into the HDLC/GFP frame on y road according to the virtual concatenation overhead that receives the n road of being transmitted by E1 mapping/de-mapping device.
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: the light signal transformed into serial data signal that UFIU UMSC Fiber Interface Unit will receive from the optical interface of SDH equipment, convert serial data signal to parallel data signal by serial/parallel transducer, it is the VC4 frame on m road, this multiplexing demultiplexing device demultiplexes into 63 tunnel VC12 frame with the VC4 frame on every road, the VC4 frame on m road just converts the VC12 frame on n1 road, wherein n1=m*63 to like this; E1 mapping/de-mapping device is mapped to n1 road VC12 frame solution according to the mapping relations of MCU module indication the E1 frame on n road, the E1 frame deblocking on n road is dressed up the data-signal on n road and the virtual concatenation overhead on n road is delivered to VCAT﹠amp by E1 framing/deframer; The LCAS module, this VCAT﹠amp; The LCAS module is according to the virtual concatenation overhead on the n road that receives, and according to the y of MCU module indication and the binding relationship of n, the HDLC/GFP frame that reassembles into the y road is transferred to the cache module of the automatic processing module of HDLC/GFP, carry out separately frame synchronization from the HDLC/GFP frame that cache module takes out this y road respectively by HDLC frame synchronization module and gfp frame synchronization module, and the frame synchronization result is sent into the HDLC/GFP deframer; Wherein the HDLC deframer according to the HDLC synchronized data signal solution frame of frame synchronization result with the z1 road after, the data-signal on z1 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated HDLC; The GFP deframer according to the GFP synchronized data signal solution frame of frame synchronization result with the z2 road after, the data-signal on z2 road is sent in the reception piece of the corresponding buffer of Ethernet data cache module, and automatically the home block of these buffers is designated GFP; The Ethernet data Switching Module pools x road Ethernet data signal after the y road Ethernet data signal in the reception piece of Ethernet data cache module is exchanged through VLAN, becomes the x road signal of telecommunication to send by converging the Ethernet interface cell translation;
Forwarding step: converge the Ethernet interface unit and convert the x road signal of telecommunication to x road Ethernet data signal, the Ethernet data signal that will be converged the large bandwidth in x road that the Ethernet interface unit sends by the Ethernet data Switching Module is divided into the Ethernet data signal of the less bandwidth in y road after through the VLAN exchange, deliver to the transmission block cache of Ethernet data cache module, the HDLC framer in the automatic processing module of this HDLC/GFP carries out z1 Ethernet data signal of the transmission block cache of the buffer of sign HDLC in the Ethernet data cache module to export z1 road HDLC frame after the HDLC framing; The GFP framer carries out z2 Ethernet data signal of the transmission block cache of the buffer of sign GFP in the Ethernet data cache module to export z2 road gfp frame after the GFP framing, by the automatic processing module of HDLC/GFP this z1 road HDLC frame and z2 road gfp frame is merged rear output y circuit-switched data signal to VCAT﹠amp; The LCAS module, this VCAT﹠amp; The LCAS module is according to the y of MCU module indication and the binding relationship of n, and according to the E1 link circuit condition, automatically select the HDLC/GFP frame with any road, distribute to the E1 link of which road normal operation, 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; E1 framing/deframer is packaged into the virtual concatenation overhead on the data-signal on this n road and n road the CRC multi-frame structure of the E1 on n road, again by the mapping relations of E1 mapping/de-mapping device according to the indication of MCU module, the E1 frame on n road is mapped to the VC12 frame on n1 road, by multiplexing demultiplexing device per 63 tunnel VC12 frame is multiplexed into 1 tunnel VC4 frame, the VC12 frame on n1 road just converts the VC4 frame on m road to like this, serial/parallel transducer is with this parallel data signal, it is the VC4 frame on m road, the transformed into serial data signal, convert this serial data signal to light signal by UFIU UMSC Fiber Interface Unit, and be transferred to the optical interface of SDH equipment, finally the E1 interface conversion through other SDH equipment on the SDH ring becomes the E1 signal to be transferred to the HDLC/GFP type protocol converter of user side.
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