The reliance of submerged network deployments on specialized hardware for acoustic communication and modulation has impeded wide scale deployments of submerged sensor networks. This paper examines a system that integrates software modems with generic speakers and microphones that are built-in to sensor modules for establishing submerged acoustic links. Building on our recent field experiment in a river, canal, pond, and swimming pool, this paper outlines the technical and logistical challenges for deploying software-driven submerged sensor network. The software modem design choices include methods for signal modulation at the sender, and symbol synchronization, signal filtering, and signal demodulation at the receiver. Higher layer communication protocol issues are also discussed, with a focus on cross-layer optimization. Practical solutions to logistical deployment challenges, such as waterproofing and casing, calibration, and fouling are proposed. The design guidelines in this paper lay the groundwork for further development of software-driven of submerged sensor networks.

Submerged Sensor Network, Physical Layer, Synchronization

[1] Yu Yang; Coll. Of Marine, Northwestern Polytech. Univ., Xi''an; Zhang Xiaomin ; Peng Bo ; Fu Yujing, “Design of sensor nodes in submerged sensor networks”, Published in: Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on Date of Conference: 25-27 May 2009 Page(s): 3978 – 3982.
[2] Dharan, K.T. ; SITE, VIT Univ., Vellore, India; Srimathi, C. ; Soo-Hyun Park, “A sweeper scheme for localization and mobility prediction in submerged acoustic sensor networks”, Published in: OCEANS 2010 IEEE – Sydney Date of Conference: 24-27 May 2010 Page(s): 1 – 7.
[3] Peng Jiang ; Syst. Eng. Res. Inst., CSSC, Beijing, China, “An submerged sensor network localization algorithm based on Time-of-Arrivals (TOAs)”, Published in: Natural Computation (ICNC), 2013 Ninth International Conference on Date of Conference: 23-25 July 2013 Page(s): 1552 – 1556.
[4] Donghoon Kim; Dept. of Comput. Sci., Florida State Univ., Tallahassee, FL ; Yong-Man Cho ; Changhwa Kim ; Sangkyung Kim, “E-ITRC Protocol with Long & Adjustable Range on Submerged Acoustic Sensor Network”, Published in: Advanced Information Networking and Applications Workshops, 2007, AINAW '07. 21st International Conference on (Volume:2) Date of Conference: 21-23 May 2007 Page(s): 665 – 672.
[5] Yuh-Shyan Chen; Dept. of Comput. Sci. & Inf. Engneering, Nat. Taipei Univ., Taipei, Taiwan ; Yun-Wei Lin; Sing-Ling Lee, “A mobicast routing protocol in submerged sensor networks”, Published in: Wireless Communications and Networking Conference (WCNC), 2011 IEEE Date of Conference: 28-31 March 2011 Page(s): 510 – 515.
[6] Blyskun, A. ; TrellisWare Technol., Inc., San Diego, CA, USA ; Johnson, M. ; Sungill Kim ; Speros, J., “Improving the SRW Waveform via a Physical Layer Retrofit”, Published in: Military Communications Conference, MILCOM 2013 - 2013 IEEE Date of Conference: 18-20 Nov. 2013 Page(s): 396 – 399.
[7] Vinodhini, C. ; M.E Commun. Syst., Anand Inst. of Higher Technol., Chennai, India ; Sivasankar, S., “Back to Results Improving wireless physical layer security via co-operative techniques” Published in: Innovations in Information, Embedded and Communication Systems (ICIIECS), 2015 International Conference on Date of Conference: 19-20 March 2015 Page(s): 1 – 4.
[8] Sengezer, N. ; Dept. of Electr. & Electron. Eng., Bilkent Univ., Ankara, Turkey ; Karasan, E., “Multi-layer Virtual Topology Design in Optical Networks Under Physical Layer Impairments and Multi-hour Traffic Demand”, Published in: Optical Communications and Networking, IEEE/OSA Journal of (Volume:4 , Issue: 2 ) Page(s): 78 – 91.
[9] Lau, V.K.N. ; Dept. of Electr. & Eng., Univ. of Hong Kong, China ; Yu-Kwong Kwok, “On the synergy between adaptive physical layer and multiple-access control for integrated voice and data services in a cellular wireless network”, Published in: Vehicular Technology, IEEE Transactions on (Volume:51 , Issue: 6 ) Page(s): 1338 – 1351 ISSN : 0018-9545.
[10] Qingyang Song ; Northeastern Univ., Shenyang, China ; Lei Guo ; Fanzhao Wang ; Shiqiang Wan, “MAC-centric cross-layer collaboration: a case study on physical-layer network coding”, Published in: Wireless Communications, IEEE (Volume:21 , Issue: 6 ) Page(s): 160 – 166 ISSN : 1536-1284 .
[11] Ivanchenko, M.V. ; Dept. of Radiophys., Nizhny Novgorod Univ., Russia ; Osipov, G.V. ; Shalfeev, V.D., “Synchronization of chaotic oscillators with type-I intermittency”, Published in: Physics and Control, 2003. Proceedings. 2003 International Conference (Volume:2 ) Date of Conference: 20-22 Aug. 2003 Page(s): 563 - 568 vol.2.
[12] Xin Qian ; Inst. of Comput. Applic. Technol., Hangzhou Dianzi Univ., Hangzhou, China ; Xinfa Shen ; Guojun Dai ; Jianhui Zhang, “Clapping and Broadcasting Synchronization in Wireless Sensor Network”, Published in: Mobile Ad-hoc and Sensor Networks (MSN), 2010 Sixth International Conference on Date of Conference: 20-22 Dec. 2010 Page(s): 140 – 145.
[13] PalChaudhuri, S.; Dept. of Comput. Sci., Rice Univ., Houston, TX, USA; Saha, A.K.; Johnsin, D.B., “Adaptive clock synchronization in sensor networks”, Published in: Information Processing in Sensor Networks, 2004. IPSN 2004. Third International Symposium on Date of Conference: 26-27 April 2004 Page(s): 340 – 348.
[14] Zhenping Chen ; Sch. of Electr. & Inf. Eng., Anhui Univ. of Sci. & Technol., Huainan, China ; Yourui Huang ; Dequan Li, “One feedback-based time synchronization method for wireless sensor networks”, Published in: Control and Decision Conference (CCDC), 2015 27th Chinese Date of Conference:23-25 May 2015 Page(s): 1459 – 1464.
[15] Xiujuan Dou ; Sci. & Technol. on Electron. Inf. Control Lab., Chengdu, China ; Yujun Kuang ; Liang Jiao ; Feng Yang, “A novel parallel state search based synchronization scheme for frequency hopping system”, Published in: Computational Problem-Solving (ICCP), 2012 International Conference on Date of Conference: 19-21 Oct. 2012 Page(s): 418-422.