Dynamic lossless bandwidth adjustment method and device for M-OTN system

Abstract

The invention discloses a dynamic lossless bandwidth adjustment method and device for an M-OTN system. A source node adds bandwidth adjustment information issued by a management and control platform to OSU frame overhead and transmits the bandwidth adjustment information to the downstream node by node; after the host node extracts bandwidth adjustment information from the OSU frame overhead, whether the residual bandwidth resource of the node meets the adjustment requirement or not is calculated, and corresponding bandwidth adjustment confirmation information is transmitted to the upstream node by node; the source node adds a bandwidth adjustment instruction issued by the management and control platform to the OSU frame overhead and transmits the bandwidth adjustment instruction to the downstream node by node; and after extracting the bandwidth adjustment instruction from the OSU frame overhead, the host node feeds back the bandwidth adjustment instruction confirmation information to the upstream node by node, and completes the adjustment of the bandwidth of each node pipeline in the link and the adjustment of the client signal bandwidth step by step. According to the scheme, a link data transmission processing process does not need to be interrupted, a unified network management and control platform control operation is not needed, and the actual use requirement of an operator network is met.

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 (abbreviated as M-OTN) is an optical transport network (optical transport network, abbreviated as OTN) technology oriented to mobile bearer optimization. With OTN technology as the core, it has single-stage multiplexing, Features such as 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. One of the mainstream solutions, recognized by global mainstream operators and equipment manufacturers. Services such as government-enterprise private lines and home broadband in the metro bearer network are the main access scenarios of the netwo...

Examples

Embodiment 1

[0051] Aiming at the requirement of the network for dynamic lossless adjustment of link bandwidth and the defects of the original bandwidth adjustment based on the G.HAO protocol, the embodiment of the present invention provides a method for dynamic lossless bandwidth adjustment of the M-OTN system, which is mainly applied to The low-speed service model (10Gbit / s and below) of the metropolitan area network in the M-OTN bearer mode, such as STM-1, STM-4 and Ethernet services, uses the OSU encapsulation format and ODUflex bearer transmission to realize dynamic bandwidth adjustment .

[0052] refer to figure 1 , for the M-OTN system, the network nodes in the link include source nodes, intermediate nodes and sink nodes in sequence from upstream to downstream, and there can be one or more intermediate nodes, figure 1 Take an intermediate node as an example. Wherein, the source node and each intermediate node have independent polling monitoring tasks, including adjustment informat...

Embodiment 2

[0089] On the basis of the above-mentioned embodiment 1, the embodiment of the present invention further uses the STM-1->OSU->ODUflex service mapping path and dynamically increases the bandwidth adjustment operation as an example. The adjusted service model is STM-4->OSU-> ODUflex, described in the model of four network nodes (source node, intermediate node 1, intermediate node 2, and sink node), provides a specific implementation method for dynamic lossless bandwidth adjustment of an 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 For the process of transmitting bandwidth adjustment confirmation information (also referred to herein as bandwidth resource feedback information), it is transmitted node by node from the sink node to the sourc...

Embodiment 3

[0112] The above-mentioned embodiment 2 takes the processing process of dynamically lossless increase of link bandwidth as an example. For the case of dynamic decrease 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 by the model of three network nodes (namely source node, intermediate node and sink node), the specific process of bandwidth reduction and adjustment is as follows:

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

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 (abbreviated as M-OTN) is an optical transport network (optical transport network, abbreviated as OTN) technology oriented to mobile bearer optimization. With OTN technology as the core, it has single-stage multiplexing, Features such as 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. One of the mainstream solutions, recognized by global mainstream operators and equipment manufacturers. Services such as government-enterprise private lines and home broadband in the metro bearer network are the main access scenarios of the netwo...

Examples

Embodiment 1

[0051] Aiming at the requirement of the network for dynamic lossless adjustment of link bandwidth and the defects of the original bandwidth adjustment based on the G.HAO protocol, the embodiment of the present invention provides a method for dynamic lossless bandwidth adjustment of the M-OTN system, which is mainly applied to The low-speed service model (10Gbit / s and below) of the metropolitan area network in the M-OTN bearer mode, such as STM-1, STM-4 and Ethernet services, uses the OSU encapsulation format and ODUflex bearer transmission to realize dynamic bandwidth adjustment .

[0052] refer to figure 1 , for the M-OTN system, the network nodes in the link include source nodes, intermediate nodes and sink nodes in sequence from upstream to downstream, and there can be one or more intermediate nodes, figure 1 Take an intermediate node as an example. Wherein, the source node and each intermediate node have independent polling monitoring tasks, including adjustment informat...

Embodiment 2

[0089] On the basis of the above-mentioned embodiment 1, the embodiment of the present invention further uses the STM-1->OSU->ODUflex service mapping path and dynamically increases the bandwidth adjustment operation as an example. The adjusted service model is STM-4->OSU-> ODUflex, described in the model of four network nodes (source node, intermediate node 1, intermediate node 2, and sink node), provides a specific implementation method for dynamic lossless bandwidth adjustment of an 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 For the process of transmitting bandwidth adjustment confirmation information (also referred to herein as bandwidth resource feedback information), it is transmitted node by node from the sink node to the sourc...

Embodiment 3

[0112] The above-mentioned embodiment 2 takes the processing process of dynamically lossless increase of link bandwidth as an example. For the case of dynamic decrease 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 by the model of three network nodes (namely source node, intermediate node and sink node), the specific process of bandwidth reduction and adjustment is as follows:

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

Images