PRIME: New Hitless Proactive Circuit Reallocation Algorithm to Mitigate Inter-Core Crosstalk Effects in EON-SDM

• Selles G. F. Carvalho IFPI / UFPI http://orcid.org/0000-0002-5908-0565
• André C. B. Soares UFPI https://orcid.org/0000-0002-3909-8610

DOI: https://doi.org/10.5753/sbrc.2025.6434

Abstract

This paper proposes a proactive circuit reallocation algorithm to mitigate inter-core crosstalk in spatially multiplexed elastic optical networks. The algorithm is activated according to the need for reorganization, identified from the continuous monitoring of the occupancy of the network links and cores, with the objective of reducing the overlap between circuits allocated in adjacent cores. Push-pull and fast-switching techniques are employed to avoid interruptions in traffic migration, making the algorithm hitless. Unlike existing approaches, which aim at spectral defragmentation, this proposal focuses directly on the proactive mitigation of inter-core crosstalk. The performance evaluation was based on metrics such as the bandwidth blocking probability, the components of the circuit blocking probability, the average number of reallocation events, and the spectral reallocation latency. The results were compared with those obtained by other algorithms and demonstrated a minimum reduction of 30% in the blocking associated with crosstalk compared to the scenario without reallocation, considering the NSFNET and EON topologies.

Keywords: EON-SDM, Reallocation, Crosstalk

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