Abstract
Quantum access networks allow a large number of users to access quantum networks, which can be regarded as an important part of the practical application for quantum communication. However, current quantum access networks have not considered as the peer-to-peer multimedia service between optical network units (ONUs) that have become the dominant service in the access networks. Thus, we propose a quantum access network that can support direct quantum and classical ONU-ONU communication by using an N:N splitter. In addition, we improve the efficiency of quantum key distribution (QKD) from both the physical and the data link layer. For the former, we analyze spontaneous Raman scattering (SRS) that is the main impairment source to QKD due to the co-propagation of the classical and quantum signal. Then, we propose a collision-avoiding scheme to reduce the influence of the SRS. For the latter, a dynamic time slot assignment protocol is proposed to reduce discarding secure keys greatly. The two methods are verified by simulations, and the results show that each method can effectively optimize QKD performance.
Highlights
Quantum key distribution (QKD) allows two parties to exchange secret keys which can be used to encrypt data [1]
QKD between optical network units (ONUs) can support 64 ONUs with the collision-avoiding scheme we proposed and the secure key rate is on the order of 105 b/s
The system can support more than 64 ONUs with drop fiber of 7 km by using the proposed collisionavoiding scheme
Summary
Quantum key distribution (QKD) allows two parties to exchange secret keys which can be used to encrypt data [1]. Not supported in the quantum access networks proposed in [18] and [19] It means peer-to-peer traffics can only be transmitted from the source ONU to the optical line terminal (OLT) by using the upstream channel. In OLT-ONU communication, both quantum and classical transmitters send individual signals at a rate of 1GHz/N in the direction of upstream. The system can even support more than 64 ONUs
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
