Efficient bandwidth allocation scheme for PON system enabling LAN emulation

• Published in: Optics communications 2023-01, Vol.526, p.128900, Article 128900
• Main Authors: Zhu, Guojun, Peng, Yunfeng, Ji, Tonghui
• Format: Article
• Language: English
• Subjects: Bandwidth allocation; LAN emulation; PON
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2022.128900

Emulating the local area network (LAN) has become a vital requirement for the passive optical network (PON). There are many efforts to establish the optical layer LAN (OLAN) in various PONs. However, the existing OLAN schemes generally isolate the LAN function from regular PON, resulting in the rigid allocation of transmission resources. To improve the flexibility of OLAN, this work presents a PON system that can achieve the conversion between PON and LAN. According to different conversions, the system forms three work modes. In addition, a novel bandwidth allocation scheme is proposed for this PON system to determine when to switch its work mode. The proposed bandwidth allocation scheme aims to reuse the idle timeslots due to the half-duplex LAN transmission by sharing the timeslot and wavelength resources between the upstream and LAN transmissions. Simulation results show that the proposed bandwidth allocation scheme can significantly outperform the traditional one in the average latency, network throughput, and load balancing performances. •A local area network scheme based on passive optical network is proposed.•Achieving flexible conversion between local area network and passive optical network.•A bandwidth allocation scheme sharing wavelength and timeslot is proposed.•The flexible system possesses outstanding latency and throughput performance.