A Protection Scheme Based on Multi-Granularity Connection Resource Sharing in Optical Networks

The Optical Service Unit (OSU) technology enables the optical transport networks to guarantee deterministic transmission for services, and the OSU protection scheme (OSU-P) can avoid resource wasting compared to traditional ones. However, how to design network protection strategies to avoid an excessive number of OSU connections while ensuring efficient service recovery is a crucial issue. This paper proposes a multi-granularity connection resource sharing protection scheme (MUGP) in optical networks. Compared to the maximum initial reserved bandwidth method, the average blocking rate can be reduced by 1.5%, average resource utilization can be saved by 5.5%, and the average failure recovery failure rate can be reduced by 3.4%. Compared to the minimum initial reserved bandwidth method, the bandwidth adjustment rate can be reduced by 27%.