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A method and device for dynamic lossless bandwidth adjustment of M-OTN system

A bandwidth adjustment and system dynamic technology, applied in the field of optical communication, can solve problems such as increased operation and maintenance costs, complex operations, and failure of automatic recovery of network nodes, and achieve the effect of simple link bandwidth adjustment operations and easy network operation and maintenance

Active Publication Date: 2022-07-08
FENGHUO COMM SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The original link bandwidth damage-free dynamic adjustment scheme developed based on the G.HAO protocol is greatly restricted in use due to its complex operation and the need for the entire link to work on the same network management platform. The link of the network management platform cannot realize the dynamic adjustment of the link bandwidth; and because the G.HAO protocol does not define an exception handling mechanism for the dynamic adjustment of the link bandwidth, in the actual use process, the network node cannot automatically recover when an unknown error occurs , requires manual intervention to return to normal, which increases the cost of operation and maintenance; based on the above reasons, this solution has not been widely used by operators

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  • A method and device for dynamic lossless bandwidth adjustment of M-OTN system
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  • A method and device for dynamic lossless bandwidth adjustment of M-OTN system

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Embodiment 1

[0051] In response to the network's demand for dynamic and lossless adjustment of link bandwidth and the defect of the original implementation of bandwidth adjustment based on the G.HAO protocol, the embodiment of the present invention provides a method for dynamic lossless bandwidth adjustment of an M-OTN system, which is mainly applied to M-OTN bearer mode metro network medium and low-speed service models (rates of 10Gbit / s and below), such as STM-1, STM-4 and Ethernet services, use OSU encapsulation format, and use ODUflex for transmission to achieve dynamic bandwidth adjustment .

[0052] refer to figure 1 , for the M-OTN system, the network nodes in the link include a source node, an intermediate node and a sink node in sequence from upstream to downstream, and the intermediate nodes can be one or more, figure 1 Take an intermediate node as an example. Among them, the source node and each intermediate node are respectively provided with independent polling monitoring ta...

Embodiment 2

[0089] On the basis of the above Embodiment 1, the embodiment of the present invention further takes the use of the STM-1->OSU->ODUflex service mapping path and the dynamic increase bandwidth adjustment operation as an example, and the adjusted service model is STM-4->OSU-> ODUflex, described in the model of 4 network nodes (source node, intermediate node 1, intermediate node 2 and sink node), provides a specific implementation for dynamic lossless bandwidth adjustment in M-OTN system.

[0090] refer to Figure 11, the whole adjustment process also includes 4 processes. The first process 1-1~1-4 is the process of transmitting bandwidth adjustment information, which is transmitted node by node from the source node to the sink node; the second process 1-5~1-8 In order to transmit the process of bandwidth adjustment confirmation information (also referred to as bandwidth resource feedback information here), it is transmitted node by node from the sink node to the source node; the...

Embodiment 3

[0112] The above Embodiment 2 takes the processing process of dynamic and lossless increase of link bandwidth as an example. In the case of dynamic reduction of bandwidth, the processing process is similar to that of bandwidth increase, except that the bandwidth adjustment information transmitted by the link is slightly different. Described in the model of three network nodes (ie source node, intermediate node and sink node), the specific process of bandwidth reduction adjustment is as follows:

[0113] In step 3-1, if the source node needs to reduce the link bandwidth due to the impact of service requirements, the management and control platform of the source node sends the corresponding bandwidth adjustment information to the source node. The bandwidth adjustment information includes a target bandwidth value BW_DES_VAL for bandwidth adjustment, an original bandwidth value BW_INI_VAL for bandwidth adjustment, and bandwidth adjustment direction information BW_DIR (ie, bandwidth...

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Abstract

The invention discloses a method and device for dynamic lossless bandwidth adjustment of an M‑OTN system. A source node adds bandwidth adjustment information issued by a management and control platform to the OSU frame overhead and transmits it downstream node by node; after a sink node extracts the bandwidth adjustment information from the OSU frame overhead, it calculates whether the remaining bandwidth resources of the node meet the adjustment requirements, and transmits corresponding bandwidth adjustment confirmation information upstream one by one; After the bandwidth adjustment command is extracted from the overhead, each node feeds back the confirmation information of the bandwidth adjustment command to the upstream, and completes the adjustment of the pipeline bandwidth of each node in the link and the adjustment of the client signal bandwidth step by step. This solution does not need to interrupt the link data transmission processing process, nor does it need a unified network management and control platform to control operations, which meets the actual use requirements of the operator's network.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a method and a device for dynamic lossless bandwidth adjustment of an M-OTN system. Background technique [0002] Mobile-optimized OTN (M-OTN for short) is an Optical Transport Network (OTN for short) technology oriented to mobile bearer optimization, with OTN technology as the core, and features such as single-stage multiplexing, more flexible slot structure, and simplified overhead. M-OTN provides low-cost, low-latency, and low-power mobile 5G bearer solutions by introducing technologies such as Optical Service Unit (OSU for short) and OTU0 / OTU25u / OTU50u interfaces. It has become one of the mainstream solutions for 5G bearer networks and has been recognized by mainstream operators and equipment manufacturers around the world. Services such as government-enterprise leased lines and home broadband in the metro bearer network are the main network acce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00
CPCH04Q11/0062H04Q2011/0086H04Q2011/0083Y02D30/50
Inventor 李剑峰
Owner FENGHUO COMM SCI & TECH CO LTD
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