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Method and system for automatically discovering ODU (Optical Digital Unit) flex bandwidth lossless regulation capability

An automatic discovery and bandwidth technology, applied in the communication field, can solve the problem that the interface does not support the ODUflex lossless adjustment capability, and achieve the effect of enhanced functions

Inactive Publication Date: 2012-07-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, not all interfaces in the existing technology support ODUflex bandwidth lossless adjustment capability, and some interfaces do not support ODUflex bandwidth lossless adjustment capability. When it is necessary to select a link with ODUflex bandwidth lossless adjustment capability, it is necessary for the control plane to be able to discover which links The router has the capability of ODUflex bandwidth lossless adjustment, and then floods this information through the routing protocol

Method used

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  • Method and system for automatically discovering ODU (Optical Digital Unit) flex bandwidth lossless regulation capability
  • Method and system for automatically discovering ODU (Optical Digital Unit) flex bandwidth lossless regulation capability
  • Method and system for automatically discovering ODU (Optical Digital Unit) flex bandwidth lossless regulation capability

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Embodiment 1

[0099] Both the source (A) interface and the remote (B) interface support the G.hao protocol, that is, the interfaces at both ends of the link support the G.hao protocol, so the link between these two interfaces supports the G.hao protocol. The process of automatically discovering the link in this embodiment supports attributes of the G.hao protocol, such as Figure 4 shown, including the following steps:

[0100] Step 101. After the link is started, the A interface sends a LinkSummary message to the B interface. The LinkSummary message contains the DATA_LINK object, and the DATA_LINK object carries the Hitless Resize sub-object newly defined in this embodiment, wherein the value of N is 1, indicating that A The interface supports the G.hao protocol;

[0101] Step 102, after the B interface receives the LinkSummary message, first determine whether the local / remote interface mapping relationship carried in the message matches the interface mapping relationship stored in the B ...

Embodiment 2

[0105] The source (A) interface supports the G.hao protocol, but the remote (B) interface does not support the G.hao protocol. The interfaces at both ends of the link do not support the G.hao protocol. Therefore, the link between these two interfaces does not support the G.hao protocol. .hao agreement. The process of automatically discovering that the link does not support attributes for the G.hao protocol, such as Figure 5 shown, including the following steps:

[0106] Step 201. Interface A sends a LinkSummary message to interface B. The LinkSummary message contains a DATA_LINK object, which carries the Hitless Resize sub-object newly defined in this embodiment, where N takes a value of 1, indicating that interface A supports G.hao protocol;

[0107] Step 202, after the B interface receives the LinkSummary message, it first determines whether the local / remote interface mapping relationship carried in the message matches the interface mapping relationship stored in the B in...

Embodiment 3

[0112] The source (A) interface does not support the G.hao protocol, and whether the remote (B) interface supports the G.hao protocol or not, the interfaces at both ends of the link do not fully support the G.hao protocol. Therefore, the link between the two interfaces The G.hao protocol is not supported. The process of automatically discovering that the link does not support attributes for the G.hao protocol, such as Figure 6 shown, including the following steps:

[0113]Step 301, the A interface sends a LinkSummary message to the B interface, the LinkSummary message contains a DATA_LINK object, and the DATA_LINK object carries the Hitless Resize sub-object newly defined in this embodiment, wherein the value of N is 0, indicating that the A interface does not support G. hao agreement;

[0114] Step 302, after the B interface receives the LinkSummary message, it first determines whether the local / remote interface mapping relationship carried in the message matches the inter...

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Abstract

The invention provides a method and a system for automatically discovering ODU (Optical Digital Unit) flex bandwidth lossless regulation capability. The method comprises the following steps: a link source terminal interface sends a link attribute message to a link opposite terminal interface, wherein the link attribute message carries information showing whether the link source terminal interface supports the ODU flex bandwidth lossless regulation capability; after the link opposite terminal interface receives the link attribute message, a message is fed back to the link source terminal interface according to the message or according to a condition that whether the message and the interface support the ODU flex bandwidth lossless regulation capability; and the link source terminal interface determines whether the link supports the ODU flex bandwidth lossless regulation capability according to the message fed back from the link opposite terminal interface. According to the invention, an LMP (Link Manager Protocol) protocol can automatically discover the support attribute of the link to the ODU flex bandwidth lossless regulation (G.hao protocol) by the expanding of a DATA_LINK object in the LMP protocol, thereby making up the deficiency of a control plane and enhancing the function of the control plane.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for automatically discovering ODUflex bandwidth lossless adjustment capabilities. Background technique [0002] Compared with the previous v2 version, the G.709v3 version of ITU-T (International Telecommunication Union Standardization Organization for Telecommunications) has added new signal types, such as ODU0, ODU4, ODU2e, and ODUflex (flexible rate optical data unit). ODUflex is to transparently transmit client signals at any rate through OTN (Optical Transport Network, Optical Transport Network), using GMP (GenericMapping Procedure, general mapping procedure) to map ODUflex into HO ODU (High OrderODU, high-order ODU). ODUflex can adapt to client signals of any rate, and then map LOODUflex (Low Order ODU, low-order ODU) into tributary time slots of the corresponding number of HO ODUs. This technology not only takes into account the effective transmission of exist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/16H04L12/24
CPCH04J14/0258H04L47/19H04L69/24H04L49/90H04B10/0793H04J3/1652
Inventor 唐可心付锡华
Owner ZTE CORP
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