Analysis Of Routing Strategy In Data Center Optical Network

Nowadays, the society is moving towards the information intelligence. As an important carrier of the information storage,forwarding and processing, the data center is the key part of the information industry infrastructure. Optical interconnect technology with high bandwidth, low latency, low energy consumption and other characteristics,is considered to be a promising data center interconnect solution. In this context, a small-world topology based OpenScale network architecture was proposed by using of multi-dimensional and multi-granularity optical switching. The network has better adaption to cloud service, the small average radius of the network,the high aggregation coefficient, the strong network expansibility. To meet the network performance requirements of high throughput, low latency and load balancing of the whole network, it is necessary to design routing method to adapt the network topology and different levels of switching resources to solve the point-to-point communication in the network. Because the logical topology of OpenScale network reflects the small world characteristics, the path between point-to-point is more abundant. The existing routing algorithms such as ECMP and WCMP are not well adapted to OpenScale network routing, ECMP or WCMP based reasonable routing strategy needs to be addressed.Therefore, the focus of this paper is to analyze the OpenScale architecture, design a reasonable routing strategy based on the network architecture, and test the performance of the routing policy by building an event-driven simulation platform that can simulate the real network functions. Finally load balance is achieved.The main work of the thesis is as follows:This paper first introduces the network structure of OpenScale, including the origin of the network architecture and the construction of the node, expatiates the concrete way of constructing the network, separates the data and the control plane of the ring network, expatiates the multidimensional granularity connection of the optical network Random wavelengths, optical burst subwavelengths), as well as easy-to-expand features.Secondly, based on the OpenScale optical interconnection architecture and according to its network mechanism, the ECMP equal-weight multipath is introduced into the optical interconnection network according to the characteristics of the large number of routes in the network. It needs to be improved, Random wavelength weighting, the operation mechanism of the proposed routing algorithm in OpenScale is expatiated and demonstrated in detail. On the physical architecture, the centralized computing shortest path is adopted and the distributed hop-by-hop forwarding mode is combined. The complexity of the run-time and flexibility to choose the route to achieve the relative balance of traffic.At last, the OPEN network simulation platform is built. On the platform, by analyzing the simulation data, the ECMP hop-by-hop routing strategy which is optimized and improved in OpenScale is validated by the whole network delay and buffer queue length.