Future of Optical Wireless Network Evolution Khemry Khourn Shimamoto Laboratory Waseda University Oct 4 th, 2014 PhD Academy

Table of Content 2  Introduction  OW vs. RF  OWC Application Areas  Proposed Studies  Current Challenges of OW Systems  What’s Next for OW Systems

3 Introduction Network of the Future IoT and M2M Software Defined Networking (SDN) Standardized & Interoperable Architectures Continuous Exponential Growth of Traffics & Technologies Satellite Networks Optical Networks Mobile Communica- tion & Networks towards 5G Demand for Greater Integration & convergence

4 OW vs. RF Systems RFOW Using radio waves and antennasUsing light and free space optical transceivers Suffers from multipath fadingDoesn’t suffer from multipath fading Prone to other RF devicesImmune to interference from other RF devices Requires NLOSRequires LOS Attenuates to rainAttenuates to Fog No affect on human’s eyesOperates under strict eye safety regulation Licensed spectrumUnlicensed spectrum Cheaper components Consume less electrical power

5 RF vs. OW Technologies State-of-the Art Commercial RF And OW Technologies Source: [1]

6 Application Areas of OW Systems Source: [1]

7 Proposed Studies 1 Optical Wireless Identification Scheme employing Thinfilm Corner Cube Retroreflector Optical Wireless Identification Scheme employing Thinfilm Corner Cube Retroreflector

8 Proposed Studies 2 Train Ticket Gate System employing Optical Wireless Communications

9 Proposed Studies 3 Indoor Optical Wireless Network for Autonomous Patient Monitoring

10 Current Challenges of OW Systems Source: [1] Mitigating Link Misalignment Error Correction Coding Efficient Transmission Techniques & Signal Modulation Experimental Works and Prototypes Improving Link Availability for Outdoor Communication Appropriate Control Protocols

11 What’s Next for OW Systems Source: [1] Next Generation Optical Wireless Communications: All-optical connection technologies Extension of optical fiber, RoF and RoFSO systems Seamless connection of FSO and fiber systems without O/E conversion Ultra-high speed/huge capacity optical wireless network Provide broadband heterogeneous wireless services Greener, more dynamic and cognitive OW networks

12 References 1.Deva K. B., Anthony C. B., Christopher C. D., Steve H. and Konstantinos Y., “A review of communication-oriented optical wireless systems”, EURASIP Journal on Wireless Communications and Networking Alfredo V. and Werner M., “Next Generation Optical Networks Enabler for Future Wireless and Wireline Applications”, White Paper of Next Generation Optical Networks, available at Khemry K., Jiang L. and Shimamoto S., “Performance Evaluation of Optical Wireless Identification Scheme employing Thinfilm Corner Cube Retroreflector”, IEEE 24th International Symposium on Personal, Indoor and Mobile Radio Communications, London, 2013.

13 Suggestions & Comments Thank you very much for your attention.