E1 emulate system

A simulation system and simulation technology, applied in transmission systems, digital transmission systems, data exchange through path configuration, etc., can solve problems such as incompatibility, reduction of operators' profits and benefits, waste of information infrastructure, etc., to achieve perfect access Network, optimize the access network, reduce the effect of construction and operation management costs

Inactive Publication Date: 2005-03-23
SHENZHEN NEW GREENNET TECH +1
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  • Abstract
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Problems solved by technology

However, the current 2 / 3 layer Ethernet switches do not have the E1 user interface (ITU-T G703 / G704 series standard) that has been widely used in traditional telecommunication networks, and various low-speed N×64Kbit / s derived from it Sub-file E1 interface, cannot exchange and transmit E1 or sub-file E1 signals through Ethernet / IP network
This makes the edge / access layer switches of the metropolitan area network incompatible with traditional E1 circuits, which still account for more than 80% of the entire telecom operating revenue.
The direct consequence of this shortcoming is the repeated construction and management of the access layer IP network and E1 network, which increases the cost of operation and maintenance, wastes information infrastructure, and reduces the profit and efficiency of operators; especially for emerging networks Operators, although they have abundant IP network resources, are unable to carry out lucrative commercial E1 or leased E1 business due to the lack of E1 access resources

Method used

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Embodiment Construction

[0022] see figure 1 and figure 2 , the E1 simulation system of the present invention includes an E1 interface circuit 1, an E1 simulation module 2, an adaptive clock recovery module 3, a single-chip microcomputer control module 4 and a DC / DC power supply 5.

[0023] Among them, the E1 interface circuit 1 is composed of a dedicated E1 line interface chip and a peripheral protection circuit, thereby forming an E1 circuit interface whose line code type is HDB3 code, conforms to the ITU-G703 standard, and has a rate of 2.048Mbit / s to complete E1 business data and signaling sending and receiving. The E1 interface circuit 1 of the present invention uses a slice of 4E1 line interface chip DS21Q50.

[0024] E1 simulation module 2 mainly completes the function of packing / unpacking E1 data based on IP. That is to say, the E1 business synchronous bit stream received by the E1 interface is sent to the Ethernet switch host 6 as an IP-based E1 emulation packet; otherwise, the timing inf...

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Abstract

This invention discloses an E1 simulation system includs an E1 interface circuit, E1 simulating module, a mono-chip processor, a control module, a DC / DC power supply and an adaptive clock resume module. The control module also includes an ARP protocol process module, ICMP protocol process module, a head process module, serial communication protocol process modules and a clock correction process module. The invented E1 simulation system can be used in edge / access layer Ethernet exchanger, using single Ethernet exchange can constitute a uniform accessed total service access network of IP and EI so as to optimize the access network.

Description

【Technical field】 [0001] The invention relates to an E1 emulation system, in particular to an E1 emulation system applied to an edge / access layer Ethernet switch. 【Background technique】 [0002] At present, the Ethernet switches widely used in the edge / access layer of the metropolitan area network are layer 2 or layer 3 switches, generally with several 10Base-T, 100Base-T or 10 / 100Base-T user Ethernet interfaces and 100M or 1000M Mega Ethernet uplink optical / electrical network interface, which can meet IEEE802.1 series network standards. However, the current 2 / 3 layer Ethernet switches do not have the E1 user interface (ITU-T G703 / G704 series standard) that has been widely used in traditional telecommunication networks, and various low-speed N×64Kbit / s derived from it The sub-file E1 interface cannot exchange and transmit E1 or sub-file E1 signals through the Ethernet / IP network. This makes the edge / access layer switches of the metropolitan area network incompatible with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26H04L12/28H04L29/06
Inventor 张树生
Owner SHENZHEN NEW GREENNET TECH
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