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Shared-Protected Backup Paths Assignment with Mode Group Division Multiplexing in Optical Networks

Jiaheng Xiong, Qiaolun Zhang, Ruikun Wang, Alberto Gatto, Francesco Musumeci, Massimo Tornatore

TL;DR

The paper investigates the resource efficiency of Shared Path Protection (SPP) when combined with Mode Group Division Multiplexing (MGDM) for optical networks, comparing it against SMT, MF-MGDM, MGDM with Dedicated Path Protection (DPP), and Full MIMO. A scalable auxiliary-graph–based heuristic is proposed to allocate backup paths, prioritizing spectrum minimization and using MIMO as a secondary objective. Results on a German topology show that MGDM with SPP substantially reduces backup-spectrum occupancy (up to ~50% less) despite higher backup MIMO requirements, thanks to effective MG sharing across link-disjoint working paths. The study demonstrates that resource sharing in MGDM-SPP offers a practical pathway to enhance capacity and efficiency in Beyond-5G/6G backhaul scenarios with manageable MIMO complexity.

Abstract

We evaluate the resource efficiency of Mode Group Division Multiplexing (MGDM) with shared path protection (SPP) in optical networks. On our case studies, SPP with MGDM obtains significant savings in terms of both additional backup spectrum occupation and MIMO-computing resources compared to other few-mode-transmission scenarios.

Shared-Protected Backup Paths Assignment with Mode Group Division Multiplexing in Optical Networks

TL;DR

The paper investigates the resource efficiency of Shared Path Protection (SPP) when combined with Mode Group Division Multiplexing (MGDM) for optical networks, comparing it against SMT, MF-MGDM, MGDM with Dedicated Path Protection (DPP), and Full MIMO. A scalable auxiliary-graph–based heuristic is proposed to allocate backup paths, prioritizing spectrum minimization and using MIMO as a secondary objective. Results on a German topology show that MGDM with SPP substantially reduces backup-spectrum occupancy (up to ~50% less) despite higher backup MIMO requirements, thanks to effective MG sharing across link-disjoint working paths. The study demonstrates that resource sharing in MGDM-SPP offers a practical pathway to enhance capacity and efficiency in Beyond-5G/6G backhaul scenarios with manageable MIMO complexity.

Abstract

We evaluate the resource efficiency of Mode Group Division Multiplexing (MGDM) with shared path protection (SPP) in optical networks. On our case studies, SPP with MGDM obtains significant savings in terms of both additional backup spectrum occupation and MIMO-computing resources compared to other few-mode-transmission scenarios.
Paper Structure (6 sections, 2 figures)

This paper contains 6 sections, 2 figures.

Table of Contents

  1. Introduction
  2. Classification of Single-Mode and Few-Mode Transmission Approaches
  3. Shared Path Protection (SPP) and Dedicated Path Protection (DPP) with MGDM
  4. Resource Allocation for SPP Backup Paths
  5. Illustrative Numerical Results
  6. Conclusion

Figures (2)

  • Figure 1: (a) illustration of MGDM MIMO complexity, (b) Comparison between SPP and DPP.
  • Figure 2: (a) Average spectrum occupation of SPP and DPP, (b) Average MIMO complexity of SPP and DPP