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Photonics
Special Issues
Next-Generation Passive Optical Networks: Progress and Challenges
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Next-Generation Passive Optical Networks: Progress and Challenges

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 3305

Special Issue Editors

Dr. Kamran Ali Memon

E-Mail Website
Guest Editor
1. Associate Professor, Department of Electronics and Telecommunication Engineering, QUEST, Nawabshah, Sindh, Pakistan
2. Department of Electronics Science and Technology, Beijing University of Posts and Telecommunications, Beijing, China
Interests: bandwidth; wavelength allocation; energy and security concerns in optical access networks (NG-PON1, NG-PON 2); high speed; long-haul DWDM transmission; coherent optical systems; optical/wireless network convergence; evolution of optical networks; Fog-PON; WSNs/WBANs; optical devices; bibliometrics
Dr. Xing Ouyang

E-Mail Website
Guest Editor
Tyndall National Institute, University College Cork, Cork, Ireland
Interests: wireless communications; fiber-optic communications; optical access networks; digital signal processing; information theory
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Gao Ran

E-Mail Website
Guest Editor
School of Information and Electronics, Beijing Institute of Technology, Beijing 100811, China
Interests: optical fiber communication; optical fiber sensing technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Next-generation passive optical access networks (NG-PONs) are continuously evolving to meet the ever-increasing demands of telecom operators and end-users, playing a fundamental role in delivering reliable, high-speed digital connections to homes. Additionally, the success of future mobile networks (5G/6G) and their deployment are also dependent on the ability of NG-PONs seamlessly connected to the radio access networks (RANs) and edge/cloud computing resources.

This Special Issue of the Photonics journal covers a large scope of research in NG-PONs, concentrating on optical access networks and the convergence of integrated fiber and wireless access technologies, and solicits contributions in, but not limited to:

  • Evolution, design, and performance evaluation of new standards for next-generation PONs;
  • Future softwarization and virtualization of optical access networks;
  • Advancements in improving the latency, reliability, protection, energy efficiency, and security of optical access networks;
  • Dynamic bandwidth allocation (DBA), dynamic and wavelength bandwidth allocation (DWBA) algorithms, and multiple media access control (MAC) mechanisms;
  • Optical metro edge and access aggregation convergence;
  • Convergence of optical access and mobile broadband systems for new radio access networks;
  • Use of AI/ML for improving performance in optical and radio access networks;
  • Fiber-wireless integrated radio access network architecture design and system interface;
  • PON architectures for low-latency and high-capacity mesh interconnect of edge nodes;
  • Free-space optical communication, elastic optical networks, radio over fiber;
  • Technoeconomics of analysis of optical access enabling dense 5G and beyond deployments;
  • Support to grid and cloud computing.
  • Low Latency Optical Network Systems & Techniques for 6G time-sensitive applications

Dr. Kamran Ali Memon
Dr. Xing Ouyang
Prof. Dr. Gao Ran
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (3 papers)

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14 pages, 2382 KiB  
Article
Joint Resource Allocation in TWDM-PON-Enabled Cell-Free mMIMO System
by Tianyu Xue, Kamran Ali Memon and Chunguo Li
Photonics 2023, 10(11), 1180; https://doi.org/10.3390/photonics10111180 - 24 Oct 2023
Viewed by 806
Abstract
Cell-free massive multiple input multiple outputs (CF-mMIMO) is considered a promising technology for sixth-generation (6G) telecommunication systems. In the CF-mMIMO system, an extensive array of distributed small base stations (BSs) is deployed across the network, which enables us to facilitate seamless collaboration among [...] Read more.
Cell-free massive multiple input multiple outputs (CF-mMIMO) is considered a promising technology for sixth-generation (6G) telecommunication systems. In the CF-mMIMO system, an extensive array of distributed small base stations (BSs) is deployed across the network, which enables us to facilitate seamless collaboration among BSs. To achieve this goal, the baseband signal from these BSs needs to be transmitted to a central server via fronthaul networks. Due to the large number of BSs, the data that needs to be transmitted is usually huge, which brings severe requirements on fronthaul networks. Time and wavelength division multiplexed passive optical networks (TWDM-PON) can be a potential solution for CF-mMIMO fronthaul due to their large capacity and high flexibility. However, how to efficiently allocate both optical and wireless resources in a TWDM-PON-enabled CF-mMIMO system is still a problem to be addressed. This paper proposes a joint scheduling method of wavelength, antenna, radio unit (RU), and radio resource block (RB) resources in the TWDM-PON-enabled CF-mMIMO system. Furthermore, an integer linear programming (ILP) model for joint resource allocation is proposed to minimize the fronthaul resource occupancy, thereby increasing network scalability. Considering the complexity of the ILP model, two heuristic algorithms are also presented to solve this model. We compare the ILP with heuristic algorithms under different scenarios. Simulation results show that the proposed algorithm can reduce the fronthaul resource occupancy to improve the network scalability of the CF-mMIMO system. Full article
(This article belongs to the Special Issue Next-Generation Passive Optical Networks: Progress and Challenges)
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12 pages, 1860 KiB  
Article
A Novel 64 QAM-OFDM Optical Access System Based on Bit Reconstruction
by Rongzhen Xie, Di Wu, Qi Zhang, Haipeng Yao, Xishuo Wang, Xiangjun Xin, Feng Tian, Qinghua Tian, Fu Wang, Yongjun Wang, Leijing Yang and Jinkun Jiang
Photonics 2023, 10(8), 879; https://doi.org/10.3390/photonics10080879 - 28 Jul 2023
Viewed by 869
Abstract
This paper proposes a novel orthogonal frequency division multiplexing (OFDM) optical access scheme based on bit reconstruction. In this method, correlation is introduced into the data information of optical line terminals (OLT) through the logical coding circuits and partition mapping. Even after passing [...] Read more.
This paper proposes a novel orthogonal frequency division multiplexing (OFDM) optical access scheme based on bit reconstruction. In this method, correlation is introduced into the data information of optical line terminals (OLT) through the logical coding circuits and partition mapping. Even after passing through the optical fibre channel, the strong correlation after bit reconstruction can still be used in the optical network unit (ONU) for reliable decoding. In the simulation experiments, a 60 Gbit/s bit reconstruction 64 quadrature amplitude modulation (QAM) OFDM signal was successfully transmitted over a 10/20 km single-mode fibre (SMF). The simulation results show that the proposed scheme can effectively achieve reliable transmission with gains of about 1.3 dB and 0.51 dB at a 20% soft decision-forward error correction (SD-FEC) threshold, respectively. The proposed scheme is a promising candidate for a next-generation passive optical network (NGPON) solution. Full article
(This article belongs to the Special Issue Next-Generation Passive Optical Networks: Progress and Challenges)
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11 pages, 1433 KiB  
Article
A Dynamic Restructuring Algorithm Based on Flexible PON Slices
by Qinghua Tian, Shixuan Li, Fu Wang, Xiongyan Tang, Dandan Sun, Haipeng Yao, Feng Tian, Qi Zhang and Xiangjun Xin
Photonics 2023, 10(6), 614; https://doi.org/10.3390/photonics10060614 - 25 May 2023
Cited by 1 | Viewed by 919
Abstract
In recent years, with the introduction of the concept of the Internet of Things, a large number of terminals connected to the network, the pressure of network bandwidth is increasing. The bandwidth resources wasted by the traditional fixed access network architecture have attracted [...] Read more.
In recent years, with the introduction of the concept of the Internet of Things, a large number of terminals connected to the network, the pressure of network bandwidth is increasing. The bandwidth resources wasted by the traditional fixed access network architecture have attracted more and more attention of researchers. In order to meet the different needs of different users for service quality and improve the flexibility of network, network slicing technology arises at the right moment. Based on the slicing idea of the flexible time- and wavelength-division multiplexing passive optical network (TWDM-PON), a dynamic PON slice restructuring algorithm (DRA) is proposed in this paper. The proposed algorithm avoids the influence of previous slicing on subsequent slicing in the step-by-step slicing process, slices at the global level, and is less affected by the randomness of initialization. The simulation results show that the performance of DRA is about 10~30% higher than that of the dynamic optical network units (ONUs) grouping algorithm (DGA) and the dynamic ONU slicing algorithm (DONUSA) when there are 8 OLTs, and is about 30% higher than that of DGA and 10% higher than that of DONUSA when there are 16 OLTs. Therefore, the proposed DRA has more positive significance to relieve the traffic pressure in the increasingly tight bandwidth resources. Full article
(This article belongs to the Special Issue Next-Generation Passive Optical Networks: Progress and Challenges)
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