Fault recovery method with regional fault tolerance in multi-layer SDN optical network
A fault recovery and optical network technology, applied in the direction of data switching network, multiplexing system selection device, digital transmission system, etc., can solve the problem of large resource consumption, improve the success rate, avoid configuration competition and spectrum competition , the effect of shortening the time taken
Active Publication Date: 2020-09-25
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
This patent establishes a backup channel for a channel that may fail. When the channel fails, the backup channel can be used to recover directly. Although this greatly reduces the recovery time, it consumes too much resources.
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[0105] The present invention simulates the experimental results on the virtual network topology. The simulation is carried out on a network of 14 nodes and 21 links, such as figure 1 Shown. We assume that the link capacity is set to 128 spectrum slots, and a spectrum slot is added between adjacent channels to protect the bandwidth of 12.5GHz. When a failure occurs in the network, the DD constraint threshold is set to 128ms, and the traffic requested by each node is randomly distributed from 2 to 8 subcarriers. In addition, the request to reconstruct the optical path follows the Poisson distribution.
[0106] The present invention analyzes the performance of the proposed recovery mechanism from two aspects, the time taken to recover from a failure, and the recovery success rate. When analyzed under different network loads, the recovery time recovery failure rate of this solution is comparable to the traditional recovery mechanism The simulation results are as figure 2 with imag...
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The present invention relates to the technical field of computer network communication, more specifically, to a fault recovery method with regional fault tolerance in a multi-layer SDN optical network, and proposes a better network fault recovery method in a multi-layer SDN optical network, so that the network When a link or a node fails, a new fault recovery strategy combined with SDN technology is proposed considering the possible regional failure while restoring the business on the failed link. This strategy introduces an SDN unified control platform, and an improved routing selection and spectrum calculation algorithm, and considers the concept of path survival when finally selecting a backup path to measure the probability of an area failure on this backup path. The invention can effectively avoid node configuration competition and frequency spectrum competition, greatly shorten the time used in the recovery process, and greatly improve the success rate of failure recovery in consideration of regional failure and link multiplexing.
Description
Technical field [0001] The present invention relates to the technical field of computer network communication, and more specifically, to a fault recovery method with regional fault tolerance in a multilayer SDN optical network. Background technique [0002] With the increase in bandwidth demand for IP data services and the uncertainty and unpredictability of IP services, people are no longer satisfied with traditional wavelength division multiplexing (WDM) networks. Traditional WDM networks believe that wavelengths have the smallest granularity with a fixed size. Due to the explosive growth of the current Internet and video services, the diversity of Internet services has greatly increased. This makes it difficult for WDM networks to adapt to service requests of different granularities, resulting in low frequency spectrum. Utilization rate, the demand for bandwidth allocation becomes more and more urgent, people need a new optical fiber network architecture to manage the bandwidt...
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IPC IPC(8): H04B10/038H04Q11/00H04L12/24H04L12/711H04L45/247
CPCH04B10/038H04L41/0663H04L45/22H04Q11/0005H04Q11/0062H04Q2011/0081H04Q2011/0073
Inventor 施展吴赞红亢中苗苏卓黄宇汪莹付佳佳蔺鹏
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD