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Pre-calculating recovery method based on distance self-adaptive route and spectrum distribution

A spectrum allocation and recovery method technology, applied in the field of pre-computation recovery based on distance adaptive routing and spectrum allocation, can solve the problem of not considering the proportion of service rerouting and recovery time

Active Publication Date: 2016-09-07
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, this recovery algorithm does not consider the problem that the calculation time of service rerouting accounts for a large proportion of the entire recovery time

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  • Pre-calculating recovery method based on distance self-adaptive route and spectrum distribution
  • Pre-calculating recovery method based on distance self-adaptive route and spectrum distribution
  • Pre-calculating recovery method based on distance self-adaptive route and spectrum distribution

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Embodiment Construction

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] The present invention provides a pre-calculation recovery method based on distance adaptive routing and spectrum allocation, Figure 7 A schematic flow chart of the method. In this method, the software-defined elastic optical interconnection data center network architecture is designed to separate the network control plane from the data forwarding plane, and the controller function module and the OpenFlow protocol are extended to realize fast and flexible customization of network functions; according to the chain The number of spectrum slots on the road divides the network topology into layers, constructs a spectrum window layered auxiliary graph model, and selects an appropriate modulation format through distance self-adaptation, and uses the spectrum window layered auxiliary graph model to route services and allocate spectrum to en...

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Abstract

The invention relates to a pre-calculating recovery method based on distance self-adaptive route and spectrum distribution. The method includes that an elastic optical interconnection data center network configuration is defined by means of design software, a network control plane and a data forwarding plane are separated, a controller function module and an OpenFlow protocol are expanded to realize the function of rapid and flexible customization of network; according to the number of spectral gaps on the link, the network topology is divided into layers and a spectral window layered auxiliary graph model is constructed, a proper modulation format is selected based on distance self-adaption, the business route and spectrum distribution is carried out based on the spectral window layered auxiliary graph model; and when the fault business is recovered, a recovered route is calculated for the business in advance by means of pre-calculating recovery technology, and when the business has faults, network resources are opened for the interrupted business by means of a pre-calculating recovery scheme and the recovered route can be rapidly established. According to the method, the dual restraint of spectrum adjacency and continuity can be met, obstruction can be prevented, and meanwhile, the fault business can be rapidly recovered, and the integral performance of the network can be improved.

Description

technical field [0001] The invention belongs to the technical field of elastic optical interconnection data center networks, and relates to a pre-computation recovery method based on distance self-adaptive routing and frequency spectrum allocation. Background technique [0002] In recent years, with the emergence of high-bandwidth services such as big data, cloud computing, and high-definition multimedia video, IP services in data center networks have grown by leaps and bounds [Index C V N. Forecast and Methodology, Technical Report, CiscoWhite Paper [R]. 2015 :2014-2019.]. The exchange of massive information in the data center and the uncertainty of service flow and flow direction urgently require the optical network to be able to carry and transmit data center services flexibly, quickly and reliably. Traditional wavelength division multiplexing (wavelength-division-multiplexing, WDM) optical network has low spectrum utilization due to fixed ITU-T wavelength interval limit...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/751H04L12/911H04Q11/00H04L45/02
CPCH04L41/0654H04L41/0803H04L41/0896H04L41/12H04L41/14H04L45/02H04L47/78H04Q11/0005H04Q11/0062H04Q2011/0081H04Q2011/0084H04Q2011/0086
Inventor 熊余李圆圆李志强王汝言
Owner CHONGQING UNIV OF POSTS & TELECOMM
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