New adaptive link layer protocol using optimal packet length for free space optical communications

Abstract In this paper, the authors propose a new link layer protocol that adapts packet length and modulation and coding scheme (MCS) to propagation conditions for free space optical communications (FSO). In conventional FSO systems, only the MCS has been adapted with respect to propagation condition. For low signal to noise ratio (SNR), we reduce packet length and use robust modulation such as On Off Keying (OOK) and low rate channel coding. While, at high SNR, we increase packet length and use large modulation constellation. A significant enhancement in throughput is observed: the proposed link layer protocol offers 1–2 dB gain compared to the conventional one where all packets are transmitted with the same length.

[1]  Mohamed-Slim Alouini,et al.  On the Performance Analysis of Hybrid ARQ With Incremental Redundancy and With Code Combining Over Free-Space Optical Channels With Pointing Errors , 2014, IEEE Photonics Journal.

[2]  Manav R. Bhatnagar,et al.  Performance Analysis of Hybrid Satellite-Terrestrial FSO Cooperative System , 2013, IEEE Photonics Technology Letters.

[3]  Murat Uysal,et al.  Information Theoretic Analysis of Hybrid-ARQ Protocols in Coherent Free-Space Optical Systems , 2012, IEEE Transactions on Communications.

[4]  Manav R. Bhatnagar,et al.  Performance Analysis of Gamma–Gamma Fading FSO MIMO Links With Pointing Errors , 2016, Journal of Lightwave Technology.

[5]  Anshul Jaiswal,et al.  Performance evaluation of space shift keying in free-space optical communication , 2017, IEEE/OSA Journal of Optical Communications and Networking.

[6]  N. T. Dang,et al.  Bit error rate analysis of rectangular QAM/FSO systems using an APD receiver over atmospheric turbulence channels , 2013, IEEE/OSA Journal of Optical Communications and Networking.

[7]  Mohamed-Slim Alouini,et al.  Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems , 2013, IEEE Wireless Communications Letters.

[8]  Murat Uysal,et al.  Survey on Free Space Optical Communication: A Communication Theory Perspective , 2014, IEEE Communications Surveys & Tutorials.

[9]  Giwan Yoon,et al.  Average Bit-Error Rate of the Alamouti Scheme in Gamma-Gamma Fading Channels , 2011, IEEE Photonics Technology Letters.

[10]  Taissir Youssef Elganimi,et al.  Performance Comparison between OOK, PPM and PAM Modulation Schemes for Free Space Optical (FSO) Communication Systems: Analytical Study , 2013 .

[11]  Manav R. Bhatnagar,et al.  Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel , 2017, Journal of Lightwave Technology.

[12]  Ivan B. Djordjevic,et al.  Shannon capacities and error-correction codes for optical atmospheric turbulent channels , 2005 .

[13]  J. Kahn,et al.  Rate-adaptive modulation and low-density parity-check coding for optical fiber transmission systems , 2012, IEEE/OSA Journal of Optical Communications and Networking.

[14]  S. Hranilovic,et al.  Outage Capacity Optimization for Free-Space Optical Links With Pointing Errors , 2007, Journal of Lightwave Technology.

[15]  Joseph M. Kahn,et al.  Rate-Adaptive Modulation and Coding for Optical Fiber Transmission Systems , 2012 .

[16]  Jaedon Park,et al.  Performance Analysis of the Asymmetric Dual-Hop Relay Transmission With Mixed RF/FSO Links , 2011, IEEE Photonics Technology Letters.

[17]  Ben He,et al.  Bit-interleaved coded modulation for hybrid RF/FSO systems , 2009, IEEE Transactions on Communications.

[18]  George K. Karagiannidis,et al.  BER Performance of FSO Links over Strong Atmospheric Turbulence Channels with Pointing Errors , 2008, IEEE Communications Letters.

[19]  Halim Yanikomeroglu,et al.  On the approximation of the generalized-Κ distribution by a gamma distribution for modeling composite fading channels , 2010, IEEE Transactions on Wireless Communications.

[20]  Mohamed-Slim Alouini,et al.  Performance Analysis of Relay-Assisted All-Optical FSO Networks Over Strong Atmospheric Turbulence Channels With Pointing Errors , 2014, Journal of Lightwave Technology.