Path protection method based on spectrum availability and protection bandwidth sharing sensing in elastic optical network

A technology of elastic optical network and bandwidth protection, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of not optimizing multi-path routing spectrum allocation strategy, not considering multi-path spectrum resource sharing protection, and reducing spectrum resource utilization Ratio and other issues, to achieve the effect of improving protection bandwidth sharing, improving spectrum utilization, and improving spectrum resource utilization

Active Publication Date: 2017-05-24
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although the multipath RSA algorithm can improve the utilization rate of spectrum resources, the existing multipath RSA algorithm does not consider the shared protection of multipath spectrum res

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  • Path protection method based on spectrum availability and protection bandwidth sharing sensing in elastic optical network
  • Path protection method based on spectrum availability and protection bandwidth sharing sensing in elastic optical network
  • Path protection method based on spectrum availability and protection bandwidth sharing sensing in elastic optical network

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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] figure 1 It is a schematic diagram of the routing spectrum allocation of the elastic optical network, as shown in the figure, assuming that each service is represented as r(s,d,TR), where s represents the source node, d represents the destination node, and TR represents the transmission rate of the service. There is business in the network r1 (A,D,40), r 2 (A,B,100), r 3 (E, D, 400), and the modulation level is DP-QPSK, then the bandwidths required by the three services are 3, 4, and 7 respectively, and the protection bandwidth is 1. If multipath transmission is used, and the protection bandwidth requirement q=0.4. The current usage of network spectrum resources is as follows: figure 1 (b) shown.

[0035] Among them, the transmission modes adopted by the three services are shown in Table 1. Allocate a protection bandwidth for e...

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Abstract

The invention belongs to the technical field of optical fiber communication, and relates to a path protection method based on spectrum availability and protection bandwidth sharing sensing in an elastic optical network. The method comprises a single-path transmission stage and a multi-path transmission stage. The single-path transmission stage comprises the following steps: firstly, reducing spectrum fragment durations by distinguishing business durations and through different spectrum distribution modes; and secondly, optimizing a protection link cost function according to different sizes of shared spectrum blocks, so that the protection bandwidth sharing degree can be increased. The multi-path transmission stage comprises the following steps: according to different business protection bandwidth requirements, adopting different multi-path transmission strategies in a self-adaptive manner to minimize the number of consumed frequency slots; and introducing a shared path protection mechanism into multi-path protection to reduce the usage of idle frequency slots. Finally, following dynamic establishment and removal of light paths in the network, spectrum allocation for a business protection path may not be carried out based on the maximum sharing degree. Through a protection bandwidth reconfiguration strategy, the protection width sharing degree can be increased, and the spectrum allocation for the protection path can be optimized.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to a path protection method based on spectrum availability and protection bandwidth sharing perception in an elastic optical network. Background technique [0002] Elastic Optical Networks (EONs) based on Optical-Orthogonal Frequency Division Multiplexing (O-OFDM) technology has attracted extensive attention because of its efficient spectrum utilization. Different from the traditional wavelength division multiplexing (Wavelength Division Multiplexing, WDM) network with fixed wavelength bandwidth allocation, EONs can flexibly allocate the required number of frequency slots (Frequency Slot, FS) according to the size of the service rate, and realize Gbit / s to Tbit / s Transmission of s-level services. [0003] With the development of network technology, the bandwidth provided by a single optical fiber reaches 400Gbit / s or even more than 1Tbit / s, so the failure of a sin...

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Application Information

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IPC IPC(8): H04B10/032H04L12/709H04L12/803H04L12/917H04L45/243H04L47/76
CPCH04B10/032H04L45/24H04L47/125H04L47/76
Inventor 刘焕淋张明佳陈浩楠王欣王寅
Owner CHONGQING UNIV OF POSTS & TELECOMM
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