A Review of DSP-Based Enabling Technologies for Cloud Access Networks

Roger Giddings, Xiao Duan, Ehab Al-Rawachy and Mingzhi Mao
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Roger Giddings: School of Electronic Engineering, Bangor University, Dean Street, Bangor LL57 1UT, UK
Xiao Duan: School of Electronic Engineering, Bangor University, Dean Street, Bangor LL57 1UT, UK
Ehab Al-Rawachy: School of Electronic Engineering, Bangor University, Dean Street, Bangor LL57 1UT, UK
Mingzhi Mao: School of Electronic Engineering, Bangor University, Dean Street, Bangor LL57 1UT, UK

Future Internet, 2018, vol. 10, issue 11, 1-21

Abstract: Optical access networks, metro networks and mobile data networks are facing rapidly evolving demands, not only is it essential to satisfy the unyielding need for increased user bandwidths, but future networks must also support the growing wide variation in traffic dynamics and characteristics, due to various emerging technologies, such as cloud-based services, the Internet-of-Things (IoT) and 5G mobile systems, and due to growing trends, such as the proliferation of mobile devices and the rapidly increasing popularity of video-on-demand services. To be cost-effective and commercially sustainable, future optical networks must offer features, such as, dynamic reconfigurability, highly efficient use of network resources, elastic bandwidth provisioning with fine granularity, network sliceabilty and software defined networking (SDN). To meet these requirements Cloud Access Networks (CANs) are proposed which require a number of flexible, adaptive and reconfigurable networking elements. By exploiting digital signal processing (DSP) we have proposed a digital orthogonal filter-based multiplexing technique to implement CANs with multiplexed, independent optical channels at the wavelength, sub-wavelength, and orthogonal sub-band levels. This paper reviews the overall CAN concept, the operating principles of the various CAN network elements and presents an overview of the research work we have undertaken in order to validate the feasibility of the proposed technologies which includes real-time DSP-based demonstrations.

Keywords: fiber optic communications; digital signal processing; cloud access networks; reconfigurable optical transceivers; soft-ROADMs; spectral converters (search for similar items in EconPapers)
JEL-codes: O3 (search for similar items in EconPapers)
Date: 2018
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