Adaptation method in use for syncretizing Ethernet and SHD or synchronous optical network

Abstract

New layer of data link layer protocol - data link procedure (DLP) is introduced in the invention to realize syncretizing adaptation between Ethernet and SDH / SONET in order to overcome shortage of current adaptation technique including not matched interface speed, not supporting dynamic bandwidth allocation based on packets, and not possible to transmit SDH / SONET on Ethernet, not compatible to IP and packet voice service etc. The method realizes direct transmission of Ethernet on SDH / SONET, and SDH / SONET on Ethernet as well as realizes compatibility to IP network and packet voice network. Using safety mechanism, network control management mechanism, flow management mechanism provided by DLP realizes network management control function such as two layer protected rearrangement, performance management, fault management etc. The method makes current communication network transits to united public network in next generation of using packet switching technology smoothly.

Description

Invention field [0001] The present invention belongs to the field of data transmission between Ethernet and synchronous digital system or synchronous optical network. It is an adaptation method used for the integration of Ethernet and synchronous digital system or synchronous optical network, and specifically is how to use synchronous digital system ( The English abbreviation is SDH) or synchronous optical network (English abbreviation is SONET) to transmit Ethernet and how to transmit synchronous digital system or synchronous optical network on Ethernet. More specifically, how to transmit Ethernet on SDH / SONET network / Fast Ethernet / Gigabit Ethernet / 10G Ethernet and how to transmit SDH / SONET on Ethernet / Fast Ethernet / Gigabit Ethernet / 10G Ethernet. The concept of the present invention is mainly used for various Ethernet or Various communication devices that synchronize digital systems or synchronize optical network interfaces, such as various routers (core or high-end switching ro...

AI Technical Summary

Problems solved by technology

[0008] (1) The above three adaptation methods mainly solve the point-to-point connection problem. Since Ethernet and SDH / SONET belong to different transmission technologies, and both have their own interface rate systems, the above three adaptation methods exist A rate mismatch problem, and SDH / SONET needs to use the virtual concatenation of high-order virtual containers and low-order virtual containers, which increases the complexity of a device

[0009] (2) The above three adaptation methods are all solutions for transmitting Ethernet over SDH / SONET. With the expansion of Ethernet to the direction of MAN, the future It will ask how SDH / SONET is transmitted on Ethernet. These three adaptation methods for the integration of Ethernet and SDH / SONET cannot be used to transmit SDH / SONET on Ethernet.

[0010] (3) The future unified public network will adopt packet switching technology, and it is difficult to realize packet-based dynamic bandwidth allocation by using the above three adaptation methods

[0011] (4) Only point-to-point connections are supported. Every time the upper-layer business passes through a node, a series of processing needs to be performed, and the upper-layer business cannot be forwarded directly

[0012] (5) For the first and second adaptation methods that use PPP+HDLC and LAPS, since the HDLC frame and LAPS frame use a specific byte (0X7E) to realize frame delimitation, it is necessary to transparentize the Ethernet MAC frame Processing, this method has two defects, one is the network security problem, if those malicious people set all the payload information to the specific two bytes (0X7D, 0X7E), then this will lead to network traffic Doubled, if a joint attack is used, it may lead to network congestion; in addition, since these two adaptation methods have no error correction function, if the frame delimitation byte is wrong (theoretical probability of error is 1 / 2 8 =1 / 256=0.00390625, which is about 3.9 per thousand), it may cause packet loss

[0013] (6) In the network using the above adaptation method, the traditional voice service is separated from the IP network service, and cannot be compatible with the IP network and the packet voice network. Now it is generally believed that the unified public network in the future should adopt packet switching These adaptation methods do not help how to realize the packetization of voice services and promote the integration of voice, data and video networks.

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