Publications (Optical Networking)
Recent advances in optical switches have led to WDM technology with networking capabilities. We are investigating how the WDM technology can be applied to the internet. Our research topics and papers are listed below.
Our papers are also available at Achivements of Advanced Network Architecture Laboratory
Shin'ich Arakawa, "Logical topology design and multi-layered survivability for IP over WDM networks," Master's Thesis, Graduate School of Engineering, Osaka-University, February 2000.
Issues for IP over WDM (Logical topology design, Reliability)
E Shin'ichi Arakawa and Masayuki Murata, "Reliability issues in IP over photonic networks," chapter 2, Quality and Reliability of Large Scale Telecom Systems - Case Studies: Olympic Games, John Wiley & Son, December 2002.
EFunctional partitioning for multi-layer survivability
E Shin'ichi Arakawa, Masayuki Murata, Hideo Miyahara, "Design methods of multi-layer survivability in IP over WDM networks," in Proceedings of OptiComm 2000, pp. 279-290, October 2000.
E Shin'ichi Arakawa, Masayuki Murata, Hideo Miyahara, "Functional partitioning for multi-layer survivability in IP over WDM networks," IEICE Transactions on Communications, pp. 2224-2233, October 2000.
EIncremental capacity dimensioning and Logical topology adaptations
E Shin'ichi Arakawa and Masayuki Murata, "On incremental capacity dimensioning in reliable IP over WDM networks," in Proceedings of OPTICOMM, pp. 153-163, August 2001.
E Shin'ichi Arakawa and Masayuki Murata, "Lightpath management of logical topology with incremental traffic changes for reliable IP over WDM networks," Optical Network Magazine, vol. 3, pp. 68-76, May 2002.
E Shinya Ishida, Shin'ichi Arakawa and Masayuki Murata, "Proposal of procedures to reconfigure logical topologies in reliable WDM-based mesh networks," in Proceedings of SPIE APOC2002 Optical Networking II, (Shanghai), vol. 4910, pp. 115-125, October 2002.
E Shinya Ishida, Shin'ichi Arakawa and Masayuki Murata, "Dynamic reconfiguration of logical topologies in WDM-based mesh networks," in Proceedings of The 7th IFIP Working Conference on Optical Network Design and Modeling (ONDM 2003), (Budapest), pp. 93-112, February 2003.
E Shinya Ishida, Shin'ichi Arakawa and Masayuki Murata, gReconfiguration of logical topologies with minimum traffic disruptions in reliable WDM-based mesh networks,h Photonic Network Communications, Vol. 6, No. 3, pp. 265-277, Nov. 2003.
ELogical topology design algorithms
E Junichi Katou, Shin'ichi Arakawa, and Masayuki Murata, "A design method of logical topology for IP over WDM networks with stable routing," in Proceedings of The Fifth Working Conference on Optical Network Design and Modeling (ONDM2001), February 2001.
E Junichi Katou, Shin'ichi Arakawa and Masayuki Murata, "A design method for logical topologies with stable packet routing in IP over WDM networks," IEICE Transactions on Communications, Vol. E86-B, No. 8, pp. 2350-2357, Aug. 2003.
EQuality of Protection, Quality of Reliability
E Junichi Katou, Shinfichi Arakawa and Masayuki Murata, "Design method of logical topologies with quality of reliability in WDM networks," in Proceedings of Workshop on Optical Networking Technologies, Architectures and Management, November 2001.
E Shin'ichi Arakawa, Junichi Katou and Masayuki Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Communications, vol. 5, no. 2, pp. 107-121, March 2003.
Issues for dynamic lightpath establishment in WDM networks
For effectively utilizing WDM, we consider the fast wavelength assignment method on demand basis in this paper. That is, when the data transfer request arises, the wavelength is dynamically assigned between source and destination nodes, and the data is transfered using the assigned wavelength. The wavelength is immediately released when the data transfer is successfully finished. In such a method, the influence of wavelength assignment time, including the propagation delay between the source and destination, becomes a key issue to achieve a high throughput such that the large bandwidth provided by the WDM technology can be enjoyed.
EPerformance analysis (analyses) for two-way path reservation
We consider two methods for wavelength reservation; a forward method in which wavelength assignment is performed along the forward path from source to receiver, and a backward method in which it is performed along the backward path. Based on our approximate analysis, we investigate the effects of propagation delays on both methods. To evaluate the above three protocols, we newly develop the approximate analysis method. Our approach is based on the Reduced Load Approximation (RLA) method which is often used in analyzing the circuit switched network. To apply the RLA method, however, we need to take account of the wavelength continuity condition in the photonic network. That is, we assume that the photonic network consists of wavelength inconvertible nodes only, and the same wavelength should be reserved between source and destination. Thus, we cannot directly apply the conventional RLA method. Further, effects of the wavelength reservation time should be considered since it much affects the performance of our network. We therefore extend the RLA method to derive the blocking probability, which is the probability that the reservation request of the source node is rejected by the network due to the lack of the available wavelength. By utilizing the blocking probability, we can easily obtain the burst data transfer delay, which is defined as the time from when the data transfer request arrives at the source node to when the data is successfully received by the destination node.
E Shin'ichi Arakawa, Kentaro Miyamoto, Masayuki Murata and Hideo Miyahara, "Performance analyses of wavelength reservation methods for high-speed data transfer in photonic networks," in Proceedings of ITC-CSCC, (Sado), pp.828-831, July 1999.
E Shin'ichi Arakawa, Kentaro Miyamoto, Masayuki Murata and Hideo Miyahara, "Delay analyses of wavelength reservation methods for high-speed burst transfer in photonic networks," in Proceeding of APCC/OECC, (Beijing), pp.445-449, October 1999.
EParallel reservation for resolving unfairness
In the OBS scheme, the wavelength is exclusively reserved along the source and destination nodes, when the burst data is generated at the source. Then, efficient data transfer is expected. However, its performance is heavily dependent on the number of links that lightpath goes through. In this paper, we propose a new protocol for OBS networks, where the lightpath for the burst transmission is set up by parallel wavelength reservations.
1. Ikutaro Ogushi,
EUltrafast path setup using optical code processing
OBS (Optical Burst Switching), in which wavelengths are reserved on demand basis is one way to effectively use WDM networks. To reduce overhead time, high-speed processing of the signaling message at each hop is imperative. However, conventional electronic processing is not fast enough and will eventually become a bottleneck as the bit rate of data links increase. To reduce the overhead time in OBS networks, we propose an OC-TAG (Optical Code based Tell-And-Go) protocol for transmitting variable length burst without buffering, and fast burst transfers over WDM networks. Optical-code-based processing is introduced for handling the out-of-band control packets. Enabling architecture and evaluation results are presented.
2. Ken-ichi Kitayama, Shin'ichi Arakawa and Masayuki Murata, "Ultrafast optical-code based path setup for optical burst switching," in Proceedings of IEEE LEOS Summer Topicals, July 2002.
3. Ken-ichi Kitayama,
5. Yosuke Kanitani, Shinfichi Arakawa, Masayuki Murata, Ken-ichi Kitayama, gHigh speed data transfer using optical code processing in WDM networksh, in Proceedings of International Conference on Optical Communications and Networks (ICOCN), Oct. 2003.
Issues for physical topology design
EMinimize number of Wavebands
EFlexible infrastructure for transporting traffic
8. Yukinobu Fukushima, Hiroaki Harai, Shin'ichi Arakawa, Masayuki Murata and Hideo Miyahara, "Planning Method of Robust WDM Networks against Traffic Changes," to be presented at The 8th IFIP Working Conference on Optical Network Design and Modeling (ONDM 2004), February 2004.
Submitted Papers (under construction)
CV (under construction. This will include domestic papers.)
I have received the M.E.
and D.E. degrees in Informatics and Mathematical Science from