CN101656743A

CN101656743A - Device for switching 63-path bridge service and kilomega Ethernet port in STM-1

Info

Publication number: CN101656743A
Application number: CN200910184176A
Authority: CN
Inventors: 关颖倩; 鄢然; 刘仓明
Original assignee: NANJING PUTIAN NETWORK CO Ltd; Nanjing Putian Telecommunications Co Ltd
Current assignee: NANJING PUTIAN NETWORK CO Ltd; Nanjing Putian Telecommunications Co Ltd
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-02-24
Anticipated expiration: 2029-08-25
Also published as: CN101656743B

Abstract

The invention discloses a device for switching a 63-path bridge service and a kilomega Ethernet port in an STM-1. the structure of the device comprises a first-level two-layer switching module, a second-level Ethernet two-layer switching module, a kilomega Ethernet electric port, a kilomega Ethernet optical port, an Ethernet over E1 and E1 mapping module, an SDH clock processing module, an STM-1 optical port, a VC4 bus and an Ethernet over E1 and E1 mapping module. The device for switching the 63-path bridge service and the kilomega Ethernet port in the STM-1 has the advantages of saving a lotof Ethernet category-5 cables and 75 omega coaxial cables, lowering the amount requirement of the Ethernet ports and E1 ports, reducing the occupation of stand space in a communication center machineroom, efficiently solving the problems of machine room wiring and maintaining difficulty caused by accessing too many cables, because 63 distal ends can be simultaneously accessed into the Ethernet over E1 bridge service only needing butt jointing a pair of optical fibers and an SDH transmission device and connecting one Ethernet category-5 cable with an Ethernet switch or a router. The inventionadopts the efficient, simple, convenient, low-cost accessing mode.

Description

Conversion equipment between 63 road network bridge services and gigabit Ethernet mouth among the STM-1

Technical field

The present invention relates to a kind of network communication apparatus, particularly be the conversion equipment between 63 road network bridge services and the gigabit Ethernet mouth among a kind of STM-1 (synchronous transfer mode level-1), belong to the network communication apparatus technical field.

Background technology

At present, a lot of local Ethernets that adopt change the IP operation that the E1 bridge inserts the user, and the E1 circuit then inserts the transmission network of being made up of SDH equipment.And the message center machine room generally inserts a large amount of professional (see figure 1)s of far-end Ethernet commentaries on classics E1 bridge by Ethernet switch and machine frame formula Ethernet commentaries on classics E1 bridge equipment.The shortcoming of this scheme is: need 75 a large amount of Ω coaxial wires to be connected with SDH transmission equipment, Ethernet 5 class cables are connected with Ethernet switch, take transmission equipment a lot of E1 interface and Ethernet interface, brought a lot of difficulties to machine room wiring and operation maintenance.Machine frame formula Ethernet commentaries on classics E1 bridge equipment substantially all more than the height of 3U, if insert 63 remote equipments, then needs a plurality of machine frame formula Ethernets to change the E1 bridge equipments, and the space that takies the machine room frame is too much.

Summary of the invention

The invention provides a kind of by STM-1 light mouth conversion equipment between 63 road network bridge services and the gigabit Ethernet mouth directly and among the STM-1 that connects of SDH transmission equipment.Be intended to overcome the above-mentioned defective of existing in prior technology.

Technical solution of the present invention: its structure is corresponding the joining of I/O end of the first output/input with the gigabit Ethernet electricity mouth of second level Ethernet layer 2 switching module; Corresponding the joining of I/O end of the second output/input of second level Ethernet layer 2 switching module and gigabit Ethernet light mouth; The 3rd output/input of second level Ethernet layer 2 switching module and first order Ethernet layer 2 switching module first the I/O end is corresponding joins; Second output/the input of first order Ethernet layer 2 switching module and Ethernet change corresponding the joining of I/O end of E1 and E2 mapping block; Output/the input of SDH overhead processor and SDH clock processor first the I/O end is corresponding joins, corresponding the joining of output/input of the second I/O end of SDH clock processor and a STM-1 light mouth, corresponding the joining of output/input of the 3rd I/O end of SDH clock processor and the 2nd STM-1 light mouth; The input that first output of VC4 bus and Ethernet change E1 and E2 mapping block joins, and second output of VC4 bus and the input of SDH overhead processor join.

Advantage of the present invention: the transducer of 63 road network bridge services and gigabit Ethernet mouth has replaced the equipment that dotted line comprised among Fig. 1 fully among the STM-1, has realized networking application shown in Figure 2.Only need a pair of optical fiber to dock with SDH transmission equipment, Ethernet 5 class cables are connected with Ethernet switch or router, just can insert 63 far-end Ethernets simultaneously and change E1 bridge business.A lot of Ethernet 5 class cables and 75 Ω coaxial cables have been saved, reduced the demand of ethernet port and e1 port quantity, also reduced taking of message center machine room mid frame space, solved effectively because of inserting machine room wiring and the problem difficult in maintenance that cable too much brings.Equipment provides powerful Network Management Function, has made things convenient for the monitoring to remote equipment.The two light mouth 1+1 Lower order path protections of STM-1 make communication link more healthy and strong.It provides a kind of efficient, easy, access way cheaply.

Description of drawings

Accompanying drawing 1 is that machine frame formula Ethernet changes E1 bridge networking application block diagram.

Accompanying drawing 2 is that block diagram is used in the transducer networking of 63 road network bridge services and gigabit Ethernet mouth among the STM-1.

Accompanying drawing 3 is converter circuit block diagrams of 63 road network bridge services and gigabit Ethernet mouth among the STM-1

Embodiment

Contrast accompanying drawing 3, its structure are corresponding the joining of I/O end of the first output/input with the gigabit Ethernet electricity mouth of second level Ethernet layer 2 switching module; Corresponding the joining of I/O end of the second output/input of second level Ethernet layer 2 switching module and gigabit Ethernet light mouth; The 3rd output/input of second level Ethernet layer 2 switching module and first order Ethernet layer 2 switching module first the I/O end is corresponding joins; Second output/the input of first order Ethernet layer 2 switching module and Ethernet change corresponding the joining of I/O end of E1 and E2 mapping block; Output/the input of SDH spending process module and SDH clock processing module first the I/O end is corresponding joins, corresponding the joining of output/input of the second I/O end of SDH clock processing module and a STM-1 light mouth, corresponding the joining of output/input of the 3rd I/O end of SDH clock processing module and the 2nd STM-1 light mouth; The input that first output of VC4 bus and Ethernet change E1 and E2 mapping block joins, and second output of VC4 bus and the input of SDH spending process module join,

The converter structure of 63 road network bridge services and the gigabit Ethernet mouth 19 inches 1U cabinets of adopting international standards among the STM-1; provide two STM-1 Guang Kou, a gigabit Ethernet RJ45 electricity mouth and a gigabit Ethernet SFP light mouth from front panel, provide linear 1+1 Lower order path protection between two STM-1 light mouths.Device interior comprises that SDH clock processing module (RC7820), SDH spending process module (RC7860), VC4 bus, Ethernet change E1 and E1 mapping block (RC7240F), first order Ethernet layer 2 switching module (RTL8318P) and second level Ethernet layer 2 switching module (MARVELL88E6045) (see figure 3).

SDH clock processing module comprises a slice SDH clock process chip (RC7820), mainly finishes clock recovery and receives the serial/parallel conversion of data and the parallel/serial conversion of transmission data.At receive direction, light signal by optical module is to the conversion of the signal of telecommunication, utilizing SDH clock process chip (RC7820) to finish two-way 155.52Mb/s line signal receives, the row clock of going forward side by side recovers and data when resetting, then data are carried out 1: 8 string and conversion, low speed 19.44Mb/s parallel signal and the clock of output behind serial to parallel conversion.The 38.88MHz system clock of equipment work is provided by the chip internal phase-locked loop circuit.At sending direction, utilize chip RC7820 to finish the reception of two-way low speed 19.44Mb/s parallel data and 8: 1 also string conversion, and utilize the line clock that recovers, the signal of telecommunication of process optical module sends data to the conversion of light signal.

The SDH spending process module comprises a slice SDH overhead processing chip (RC7860), utilizes the RC7860 chip to finish STM-1 frame synchronization, and regenerator section, multiplex section, Higher Order Path Overhead are handled, and SDH low order tributary unit TU-12 multi-frame alignment function.Communicate by letter with the E1 mapping block by the VC4 bus.

Ethernet changes E1 and E1 mapping block (RC7240F) comprises 4 multichannel Ethernet conversion mapping chips (RC7240F), every RC7240F chip is finished 16 road Ethernets and is received function to conversion, 16 road E1 passages of 16 road E1 passages to the mapping of VC4 bus and the concurrent choosing of every road E1 channel data, and 16 road SMII interfaces are provided, be used for and being connected of two layers of exchange chip of Ethernet.

First order Ethernet layer 2 switching module comprises two layers of exchange chip of 4 Ethernets (RTL8318P), two layers of exchange chip of each Ethernet (RTL8318P) are the chips with 18 ports, 16 road SMII interfaces are provided, Ethernet MII interface and one road gmii interface utilize RTL8318P to finish the two layers of exchange of first order Ethernet data bag and the VLAN isolation features of Ethernet data bag; Provide the MII interface to be connected with second level Ethernet layer 2 switching module.

Second level Ethernet layer 2 switching module comprises 1 two layers of exchange chip of Ethernet (MARVELL88E6045), 4 ethernet physical layer chips (IP101A) and 1 gigabit Ethernet physical chip (MARVELL88E1112) with gigabit ethernet interface, the two layers of exchange and the Ethernet data bag VLAN that utilize these chips to finish second level Ethernet data bag isolate, the gigabit Ethernet electrical interface is provided, cooperates the SFP optical module that the gigabit Ethernet optical interface is provided.

Claims

1, conversion equipment between 63 road network bridge services and gigabit Ethernet mouth among the STM-1 is characterized in that its structure is corresponding the joining of I/O end of the first output/input and the gigabit Ethernet electricity mouthful of second level Ethernet layer 2 switching module; Corresponding the joining of I/O end of the second output/input of second level Ethernet layer 2 switching module and gigabit Ethernet light mouth; The 3rd output/input of second level Ethernet layer 2 switching module and first order Ethernet layer 2 switching module first the I/O end is corresponding joins; Second output/the input of first order Ethernet layer 2 switching module and Ethernet change corresponding the joining of I/O end of E1 and E2 mapping block; Output/the input of SDH spending process module and SDH clock processing module first the I/O end is corresponding joins, corresponding the joining of output/input of the second I/O end of SDH clock processing module and a STM-1 light mouth, corresponding the joining of output/input of the 3rd I/O end of SDH clock processing module and the 2nd STM-1 light mouth; The input that first output of VC4 bus and Ethernet change E1 and E2 mapping block joins, and second output of VC4 bus and the input of SDH spending process module join.