CN1503522A - Method for realizing data all interconnection exchange in MAN transmission equipment - Google Patents
Method for realizing data all interconnection exchange in MAN transmission equipment Download PDFInfo
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- CN1503522A CN1503522A CNA02153182XA CN02153182A CN1503522A CN 1503522 A CN1503522 A CN 1503522A CN A02153182X A CNA02153182X A CN A02153182XA CN 02153182 A CN02153182 A CN 02153182A CN 1503522 A CN1503522 A CN 1503522A
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Abstract
This invention discloses a method for realizing data complete interconnection exchange in city transmission equipments which is to set an interface module on every CB of the equipment. The CB carries out data exchange process via the module 1) the CB adds a destination CB number and network channel number information in every data packet needs to be forwarded then to send it to the complete interconnection interface module sending the data to related destination CB for complete interconnection 2) the destination CB sends the data to a coherent data port according to the channel number after receiving the said data packet.
Description
Technical field
The present invention relates to a kind of apparatus interconnection technology, particularly a kind of method that in city area transmission equipment, realizes the totally interconnected exchange of data.
Background technology
At present, city area transmission equipment generally adopts traditional concentrated switching fabric mode, and its structure is referring to Fig. 1, Fig. 1 in the prior art to concentrate the structural representation of the switch that the switching fabric mode makes up.As shown in Figure 1, this switch mainly is made of three kinds of core veneers: master control borad 101, wiring board 102 and network board 103.A protocol data message (PDU) enters from the uplink port of a wiring board 102, transmit processing up, obtain the descending outbound port routing iinformation of switching network, through switching network 103 exchanges, arrive another wiring board 102 and carry out downlink processing, after obtaining downgoing line port routing iinformation, send from the descending outbound port of these interface card 102 correspondences.
It seems that from top structure the linear speed data (Wire-SpeedData) that entire equipment enters from any port all need to carry out route switching through network board 103.The reliability of network board 103 has determined the reliability of entire equipment.Exist so present network board 103 generally all is the double copies mode,, can switch at any time on the network board 103 of reserve and work if one breaks down.Even so, because entire equipment still can cause system reliability to be affected to the dependence of network board.In addition, increased active and standby two network boards, improved the production cost of equipment just to the function that exchanges.
A kind of novel switching network solution---distributed switch fabric has appearred at present.Fig. 2 is the topological model structural representation of distributed switching network, as shown in Figure 2, the data of being sent by uplink port send to up crosspoint 202 after through forwarded upstream unit 201, up crosspoint 202 does not directly link to each other with all descending buffer cells 203 by network board, data send to a corresponding descending buffer cell 203, send to downlink port through downlink processing unit 204 again.The outstanding feature of distributed switch fabric is, can save its normally used active and standby two network boards, can reach the purpose of saving groove position resource, reducing the device fabrication cost.
For distributed switch fabric, the producer that has realizes, still, does not realize the application-specific IC of this type of function in the market, does not also have disclosed implementation method.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method that realizes totally interconnected exchange in metropolitan area equipment, this method can realize the totally interconnected exchange of metropolitan area equipment, and can save groove position resource, improves the reliability of equipment, reduces the production cost of equipment.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method that realizes the totally interconnected exchange of data in city area transmission equipment is provided with a totally interconnected interface module on this method each wiring board in city area transmission equipment, and the process that wiring board carries out exchanges data by this totally interconnected interface module is as follows:
1) after wiring board receives the outside packet that needs to transmit, be this packet adding purpose wiring board number and network channel information, send to totally interconnected interface module then, totally interconnected interface module number sends the data to the totally interconnected interface module of purpose wiring board according to the purpose wiring board in the packet;
2) after the purpose wiring board is received these data by totally interconnected interface module, number will send data according to network channel.
Wherein, described totally interconnected interface module can be by the programmable logic device in this module, sends the data in this module and the corresponding parallel/serial transducer of purpose wiring board, is converted to high-speed serial data, sends to the high-speed serial bus of backboard.
The step 2 of this method) may further include: the totally interconnected interface module of purpose wiring board receives data by parallel/serial transducer corresponding with the transmitting line plate in this module, and with these data and send to the programmable logic device of this totally interconnected interface module.Step 2) the totally interconnected interface module that can further include the purpose wiring board is to receive data by polling mode by the parallel/serial transducer corresponding with the transmitting line plate.
The maximum number that the number of above-mentioned parallel/serial switching device can be set to the wiring board that city area transmission equipment holds subtracts one.
The totally interconnected interface module that this method can further include the purpose wiring board sends flow-control information to the transmitting line plate, and the transmitting line buttress sends data or stops to send data according to flow-control information.This method can adopt the byte level Flow Control.
This method step 1) the totally interconnected interface module that can further include the transmitting line plate is inserted frame head and the postamble that different leading characters comes identification data in sending data; Step 2) the totally interconnected interface module that also may further include the purpose wiring board is received after the data this leading character deletion.
Wiring board described in this method can be Ethernet disposable plates or synchronous digital hierarchy (SDH) mapping plate; Can there be one or more Ethernet disposable plates and one or more synchronous digital hierarchy (SDH) mapping plate to interconnect in this method.This method can further include between each Ethernet disposable plates and interconnects.
By technical scheme recited above as seen, this method that in city area transmission equipment, realizes the totally interconnected exchange of data of the present invention, not only realized the totally interconnected exchange of metropolitan area equipment, can save groove position resource, the reliability of raising equipment, the production cost of reduction equipment, and easy realization with low cost.
Description of drawings
Fig. 1 in the prior art to concentrate the structural representation of the switch that the switching fabric mode makes up;
Fig. 2 is the topological model structural representation of distributed switching network;
Fig. 3 is the totally interconnected switching fabric schematic diagram of a preferred embodiment of the present invention;
Fig. 4 is the structural representation of totally interconnected interface module among the present invention;
Fig. 5 is the up processing schematic diagram of FPGA in the totally interconnected interface module;
Fig. 6 is the downlink processing schematic diagram of FPGA in the totally interconnected interface module.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The present invention realizes that in metropolitan area equipment the concrete grammar of totally interconnected exchange is: a totally interconnected interface module is set respectively on each wiring board in city area transmission equipment, wiring board can be Ethernet disposable plates and synchronous digital hierarchy (SDH) mapping plate, and each Ethernet disposable plates and SDH Map Unit directly carry out exchanges data by this totally interconnected interface module.Wherein, an Ethernet disposable plates can be carried out exchanges data with the polylith SDH Map Unit, and polylith Ethernet disposable plates also can be carried out exchanges data with a SDH Map Unit, also can carry out exchanges data between each Ethernet disposable plates.Adopt the inventive method can cancel original network board that is exclusively used in exchanges data between plate in the city area transmission equipment.
Fig. 3 is the totally interconnected switching fabric schematic diagram of a preferred embodiment of the present invention, and Fig. 3 has provided the connected mode of four Ethernet disposable plates and four SDH Map Units.As shown in Figure 3, the every totally interconnected interface module 311 that Ethernet disposable plates 310 all comprises Ethernet processing unit 312 at least and is attached thereto, the every totally interconnected interface module 321 that SDH Map Unit 320 all comprises SDH map unit 322 at least and is attached thereto.Every Ethernet disposable plates 310 directly links to each other by totally interconnected interface module 311,321 with every SDH Map Unit 320, also can directly link to each other between the every Ethernet disposable plates 310, only show the connected mode of Ethernet disposable plates 310 and adjacent Ethernet disposable plates 310 among the figure by totally interconnected interface module 311.Every SDH Map Unit 320 links to each other with SDH cross board 330.As seen, the present invention has cancelled original network board in the city area transmission equipment, and function of exchange is distributed on each Ethernet disposable plates and the SDH Map Unit, can save groove position resource, has improved the reliability of equipment, has reduced the production cost of equipment.
Be the course of work of coming the totally interconnected function of exchange of illustrative system according to the flow direction of data respectively below: data flow can be divided into the uplink and downlink both direction, the up packet that is meant enters system from Ethernet interface, in Ethernet disposable plates 310, handle through Ethernet processing unit 312 earlier, send to the totally interconnected interface module 321 of SDH Map Unit 320 again by backboard by totally interconnected interface module 311, deliver to SDH map unit 322 again and handle, send to the process of SDH line interface at last by the SDH cross board 330 that links to each other with SDH map unit 322; The descending packet that is meant sends to SDH Map Unit 320 from the SDH line interface by SDH cross board 330, handle through the SDH map unit in the SDH Map Unit 320 322 earlier, send to the totally interconnected interface module 311 of Ethernet disposable plates 310 again by backboard through totally interconnected interface module 321, send to Ethernet processing unit 312 again, send to the process of Ethernet interface at last.
Referring to Fig. 3, the flow process of this embodiment data uplink is:
1) packet is introduced into Ethernet processing unit 312, and packet can be inserted by different Ethernet interfaces, as Fast Ethernet, Gigabit Ethernet.After the Ethernet bag of consolidation form enters Ethernet processing unit 312, table look-up according to the data message in the packet, can be meant the routing table of searching in the city area transmission equipment here, tabling look-up of the following stated is identical therewith.Determine that purpose wiring board number (Tag1) and network channel number (Tag2) are added on data packet head, send to totally interconnected interface module 311.Wherein, Tag1 uses for totally interconnected interface module, and Tag2 uses for the SDH mapping block.
2) after totally interconnected interface module 311 is received the packet that has Tag, determine according to Tag1 which piece veneer packet is sent to, whether the flow control signal decision according to veneer sends data then, and what the present invention adopted is the byte level Flow Control.After the permission of receiving the other side sends signal, send the data to the totally interconnected interface module of corresponding veneer.Here, corresponding veneer can be a SDH Map Unit 320, also can be Ethernet disposable plates 310.Because the processing comparing class of two kinds of situations seemingly, the example that is treated to SDH Map Unit 320 describes below.
3) after the totally interconnected interface module 321 on the SDH Map Unit 320 receives packet, directly send to mapping block 322, encapsulation format that mapping block 322 determine to use according to the Tag2 in the packet and mapping channel number, finish encapsulation and mapping process, after removing Tag1 and Tag2, be sent to SDH cross board 330.
Referring to Fig. 3, the flow process of this embodiment data downstream is:
1) data of getting off from SDH cross board 330 at first arrive the SDH map unit 322 the SDH Map Unit 320, finish decapsulation and conciliate mapping, and determine the purpose veneer according to arriving data place channel number and data message, after giving packet adding purpose line interface veneer number (Tag1) and network channel number (Tag2), send to totally interconnected interface module 321.Similar with up processing, Tag is divided into 2 part (Tag1, Tag2), Tag1 uses for totally interconnected interface module 321, determine concrete purpose veneer, Tag2 represents the channel number information of SDH, carries out table lookup operation for Ethernet processing unit 312, can reduce the operation of SDH mapping block 322 like this, transfer task to Ethernet processing unit 312 and handle.
2) after totally interconnected interface module 321 is received the packet that has Tag, determine according to Tag1 which piece veneer packet is sent to, whether the flow control signal decision according to veneer sends data then, after the permission of receiving the other side sends signal, send the data to the totally interconnected interface module 311 of corresponding Ethernet disposable plates 310.
3) after the totally interconnected interface module 311 on the Ethernet disposable plates 310 receives packet, directly send to Ethernet processing unit 312, network processing unit is tabled look-up according to SDH channel number (Tag2) and data message in the packet, determine concrete output port, after removing Tag1 and Tag2, data are sent.
This shows, realize that key of the present invention is that a totally interconnected interface module that can realize totally interconnected function of exchange is set.Fig. 4 is the structural representation of totally interconnected interface module among the present invention, and as shown in Figure 4, Network Interface Module of the present invention has connected parallel/serial transducer (SERDES) 402 by a programmable logic device (FPGA) 401 to be realized.The number of wherein parallel/serial transducer 402 is that the number of the heap(ed) capacity of Ethernet disposable plates and SDH Map Unit subtracts one.For example, the Ethernet disposable plates of a city area transmission equipment and the heap(ed) capacity of SDH Map Unit are five, and the number of then parallel/serial transducer 402 is four, and this is because this plate will interconnect with other four veneers.FPGA: realize exchanges data between each veneer according to the purpose line interface veneer number (Tag1) that adds in network processing unit or the SDH map unit and network channel number (Tag2) information, FPGA is the core of totally interconnected interface module.SERDES: the data transaction of finishing parallel data and High speed rear panel universal serial bus.
Comprise five Ethernet disposable plates and SDH Map Unit with city area transmission equipment below, totally interconnected interface module on every veneer comprises a FPGA and four SERDES are example, and the course of work of totally interconnected logic function specific implementation is described respectively according to the flow direction of data.Data flow can be divided into the uplink and downlink both direction, the up packet that is meant enters FPGA from the network interface of network processing unit/SDH map unit, through the FPGA processing data are distributed to different SERDES transmit ports, after SERDES High speed rear panel bus is given other veneer; Descending is that FPGA receives data from the SERDES port, and (RoundRobin, RR) scheduling is given the process that network processing unit/the SDH map unit is handled packet to press poll.
In the data uplink process, data are handled by FPGA earlier, the processing procedure of FPGA is referring to Fig. 5 in the data uplink process, Fig. 5 is the up processing schematic diagram of FPGA in the totally interconnected interface module, as shown in Figure 5, FPGA receives data from network interface (NP), the data of network interface output are kept at metadata cache 501, then according to the frame head information (Tag1) in the packet, Tag1 is equivalent to one four and selects one logic switch 502, data are delivered to corresponding dateout buffer memory 503, again data are delivered to corresponding SERDES transmit port; Totally interconnected exchange of the present invention in addition is a packet exchange of supporting random length, back-pressure between all of the port is a byte level, rather than bag level back-pressure, in the data of SERDES parallel data grabbing card, there are not data frame head, postamble sign like this, therefore FPGA inserts different leading K characters and identifies frame head, postamble position according to different data types (frame head, postamble and payload) in the data that send.SERDES is converted to serial data with parallel data and sends to the High speed rear panel bus after receiving the data of FPGA transmission.
In the data downstream process, data receive data by SERDES from the High speed rear panel bus earlier, send the data to FPGA by the SERDES port again and handle, the processing procedure process of data downstream FPGA is referring to Fig. 6, and Fig. 6 is the downlink processing schematic diagram of FPGA in the totally interconnected interface module.As shown in Figure 6, the valid data that receive from four SERDES ports are cached to earlier the input metadata cache (RAM) 601 of FPGA inside, FPGA presses RAM 601 states of polling method (RR) 602 each SERDES receiving port of inquiry, when port has the data of reception, according to the different sign frame head of data insertion when sending, the leading K character of postamble position, read a partial data message of this port, remove the leading K character of this message then, through behind the metadata cache 603, again data are delivered to the data-in port of network interface (NP).After receiving this port one complete data packet, continue to inquire about next SERDES receiving port state by polling method.
Can see that from top embodiment the present invention has not only realized the totally interconnected exchange of metropolitan area equipment, save groove position resource, improve the reliability of equipment, reduce the production cost of equipment, and easy realization with low cost.
Claims (10)
1, a kind of method that in city area transmission equipment, realizes the totally interconnected exchange of data, it is characterized in that: a totally interconnected interface module is set on each wiring board in city area transmission equipment, and the process that wiring board carries out exchanges data by this totally interconnected interface module is as follows:
1) after wiring board receives the outside packet that needs to transmit, be this packet adding purpose wiring board number and network channel information, send to totally interconnected interface module then, totally interconnected interface module sends the data to the corresponding target wiring board according to the purpose wiring board information in the packet;
2) after the purpose wiring board is received this packet by totally interconnected interface module, number data are sent to corresponding FPDP according to the network channel in the packet.
2, the method that in city area transmission equipment, realizes the totally interconnected exchange of data as claimed in claim 1, it is characterized in that: described totally interconnected interface module is by the programmable logic device in this module, send the data in this module and the corresponding parallel/serial transducer of purpose wiring board, be converted to high-speed serial data, send to the high-speed serial bus of backboard.
3, the method that in city area transmission equipment, realizes the totally interconnected exchange of data as claimed in claim 2, it is characterized in that, step 2) further comprise: the totally interconnected interface module of purpose wiring board receives data by parallel/serial transducer corresponding with the transmitting line plate in this module, and these data is sent to the programmable logic device of this module.
4, the method that realizes the totally interconnected exchange of data in city area transmission equipment as claimed in claim 3 is characterized in that: the totally interconnected interface module that described step 2) further comprises the purpose wiring board receives data by polling mode by the parallel/serial transducer corresponding with the transmitting line plate.
5, as claim 2, the 3 or 4 described methods that realize the totally interconnected exchanges of data in city area transmission equipment, it is characterized in that: the maximum number that the number of described parallel/serial switching device is set to the wiring board that city area transmission equipment holds subtracts one.
6, the method that in city area transmission equipment, realizes the totally interconnected exchange of data as claimed in claim 1, it is characterized in that: this method comprises that further the totally interconnected interface module of purpose wiring board sends flow-control information to the transmitting line plate, and the transmitting line buttress sends data or stops to send data according to flow-control information.
7, as claim 1 or the 6 described methods that realize the totally interconnected exchange of data in city area transmission equipment, it is characterized in that: this method adopts the byte level Flow Control.
8, the method that realizes the totally interconnected exchange of data in city area transmission equipment as claimed in claim 1 is characterized in that: the totally interconnected interface module that this method step 1) further comprises the transmitting line plate is inserted frame head and the postamble that different leading characters comes identification data in sending data; Step 2) the totally interconnected interface module that further comprises the purpose wiring board is received after the data this leading character deletion.
9, the method that realizes the totally interconnected exchange of data in city area transmission equipment as claimed in claim 1 is characterized in that: described wiring board is Ethernet disposable plates or synchronous digital hierarchy (SDH) mapping plate; There is at least one Ethernet disposable plates and at least one synchronous digital hierarchy (SDH) mapping plate to interconnect in this method.
10, the method that realizes the totally interconnected exchange of data in city area transmission equipment as claimed in claim 9 is characterized in that: this method further comprises between each Ethernet disposable plates and interconnecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02153182 CN1251453C (en) | 2002-11-26 | 2002-11-26 | Method for realizing data all interconnection exchange in MAN transmission equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02153182 CN1251453C (en) | 2002-11-26 | 2002-11-26 | Method for realizing data all interconnection exchange in MAN transmission equipment |
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| Publication Number | Publication Date |
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| CN1503522A true CN1503522A (en) | 2004-06-09 |
| CN1251453C CN1251453C (en) | 2006-04-12 |
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| CN 02153182 Expired - Fee Related CN1251453C (en) | 2002-11-26 | 2002-11-26 | Method for realizing data all interconnection exchange in MAN transmission equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000193A1 (en) * | 2006-06-23 | 2008-01-03 | Huawei Technologies Co., Ltd. | An exchange system and method for increasing exchange bandwidth |
| CN1937782B (en) * | 2006-08-04 | 2010-04-14 | 华为数字技术有限公司 | Frame device and its message transmitting method |
| CN101568048B (en) * | 2009-05-15 | 2015-01-28 | 中兴通讯股份有限公司 | Data transmission method and system |
-
2002
- 2002-11-26 CN CN 02153182 patent/CN1251453C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000193A1 (en) * | 2006-06-23 | 2008-01-03 | Huawei Technologies Co., Ltd. | An exchange system and method for increasing exchange bandwidth |
| CN1937782B (en) * | 2006-08-04 | 2010-04-14 | 华为数字技术有限公司 | Frame device and its message transmitting method |
| CN101568048B (en) * | 2009-05-15 | 2015-01-28 | 中兴通讯股份有限公司 | Data transmission method and system |
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| Publication number | Publication date |
|---|---|
| CN1251453C (en) | 2006-04-12 |
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Granted publication date: 20060412 Termination date: 20171126 |