Networking Protocols


Co-Chairs: Tony BOUCOUVALAS & Marcos KATZ

Vice-Chair: Slavisa ALEKSIC


While WG2 focuses on PHY layer for point-to-point transmission, WG3 will deal with upper layer protocol stacks as well as investigating co-existence and interoperability of OWC with other communication networks. The activities within WG3 can be grouped into two main categories targeting long-range (i.e., on the order of kilometres) and short/medium-range (i.e., up to a few tens of metres) OWC networks elaborated in the following.

Experimental studies by the participants of this Action have recently demonstrated the successful deployment of dense wavelength division multiplexing (DWDM) in point-to-point terrestrial OWC links. This has resulted in the realization of aggregate speeds at the order of Terabits per second (Tb/s) for outdoor systems. Building on these promising results, WG3 considers a wide-area outdoor OWC ultra-broadband network which consists of a set of geographically distributed transceiver nodes and atmospheric links interconnecting the nodes. Due to OWC's inherently different link nature and spatially confined electromagnetic transmission, traditional networking protocols developed either for wired networks or wireless RF networks are not applicable to degree-constrained and highly dynamic OWC networks. WG3 will fill out this significant research gap by developing

• Advanced automatic repeat request (ARQ) algorithms with an incremental redundancy for improved link layer performance;
• Multiple access techniques based on the available spatial, temporal, wavelength and code dimensions;
• Cross-layer designs and channel-aware packet scheduling algorithms to exploit multiuser diversity;
• Dynamic and autonomous topology control schemes for proactive reconfiguration (both in software and hardware) of the OWC network in response to changes in atmospheric and traffic conditions and user demands;
• Agile routing and wavelength assignment algorithms with optimized performance metrics (i.e., end-to-end delay, throughput, QoS) assuming different networking architectures such as optical circuit switching (OCS), optical burst switching (OBS) and optical packet switching (OPS);
• Fault detection, avoidance and recovery strategies required for harnessing the continuity of service provisioning in a fault-susceptible network environment.

For short/medium-range communications, the focus of the WG3 will be on the design of OWC-based WLANs, WPANs and WBANs, covering ranges from a few tens of metres down to sub-metre communications. The latest commercially available products have already entered the Gigabits/second (Gb/s) regime, e.g., Giga-IR from IrDA enables personal OWC at 1.25 Gb/s. The optimal utilization of this unprecedented capacity calls for a detailed study and innovative extension of available protocol stacks along with novel optimized designs. Specific research areas will be

•  Evaluation and individual optimization of Giga-IR protocols such as OBEX (Object exchange protocol), TTP (Tiny transport protocol), IrLMP (Infrared link management protocol), IrLAP (Infrared link access protocol);
•   Identification of protocol interactions that affect the stack performance in Giga-IR and cross-layer optimizations;
•  Design of novel and robust admission control, multiple-access, and interference management techniques for cellular OWC WLAN networks;
•   Routing algorithms and range optimization for VLC-based vehicle-to-vehicle networks.

WG3 will further investigate the co-existence and interoperability of OWC with other communication technologies and networks and develop heterogeneous network architectures to optimally utilize the potential of OWC.




1. OPTICWISE becomes an Associate Member of the 5G PPP.


2. OPTICWISE participates in the preparation of new IEEE standart on OWC.


3. IWOW 2014 Workshop Proceedings are now available at IEEExplore! All papers can be accessed through this link.


4. OPTICWISE Chair to Give Keynote Speech at BlackSeaCom Conference.


5. IWOW 2013 Workshop Proceedings are now available at IEEExplore! All papers can be accessed through this link.

6. COST IC1101 OPTICWISE Action World Record: A FSO link at 1.6 Tbit/s (see more details on SPIE Vol 52, Issue 11, Nov 2013). 


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