Mr. Miyagi received the telecom system technological student award.

Title : Advanced Wavelength Reservation Method Based on Deadline-Aware Scheduling for Lambda Grid Networks
Abstract : A deadline-aware-scheduling scheme for the lambda grid system is proposed to support a huge computer grid system based on an advanced photonic network technology. The assignment of wavelengths to jobs in order to efficiently carry various services is critical in lambda grid networks. Such services have different requirements such as the job-completion deadlines, and wavelength assignment must consider the job deadlines. The conventional job scheduling approach assigns a lot of time slots to a call within a short period in order to finish the job as quickly as possible. This raises the blocking probability of short deadline calls. Our proposal assigns wavelengths in the lambda grid networks to meet quality-of-services guarantees. The proposed scheme assigns time slots to a call over time according to its deadline, which allows it to increase the system performance in handling short deadline calls, for example, lowering their blocking probability. Computer simulations show that the proposed scheme can reduce the blocking probability by a factor of 100 compared with the conventional scheme under the low load condition in which the ratio of long deadline calls is high. The proposed scheduling scheme can realize more efficient lambda grid networks.

Mr. Kikuta’s paper about GMPLS controlled Ethernet experiment was accepted for a poster presentation at iPOP2008.

Title: “Experiment of End-to-End VLAN Path Establishment using Inter-domain VLAN Tag Swapping in Wide-Area-Ethernet Controlled by GMPLS”
Authors: Kou Kikuta, Masahiro Nishida, Daisuke Ishii, Satoru Okamoto, Naoaki Yamanaka
Abstract: Wide-Area-Ethernet Service provides multiple inter-connections among customers’ LANs. In Wide-Area-Ethernet network, Virtual paths are established on layer-2 by VLAN (Virtual LAN) technology. Network switches read VLAN tag, path identification extended bit in Ethernet frame, and determine forwarding direction for each frame. We need to setup VLAN configuration of each switch to establish new path. GMPLS is able to setup the switches’ configuration automatically and establish the new path just after customer demand. We are researching on this protocol’s details, exchanged VLAN information, controlling switches, using limited numbers of VLAN IDs, and others. We presentation addresses Layer-2 Switching Capability (L2SC) with VLAN tag swapping. In Wide-Area-Ethernet network, same VLAN ID is used throughout a path. However, a number of VLAN ID is limited to 4096 due to extended frame format, thus there is a limit to the number of paths. VLAN swapping enables to use more VLAN IDs in a network like a Wavelength Converter.
We implemented a VLAN swapping function on Linux based PC and controlled the function by using GMPLS. In the experimental network, we used VLAN tag swapping switches that implemented by Linux PC. Multiple paths can be established by VLAN tag based switching that includes VLAN tag swapping.

Mr. Marukawa received the best poster & presentation award from the IEICE Technical Committee on Photonic Network (PN) .
Congratulations!!!!

Mr. Shimizu’s paper about parallel reconfigurable processor was accepted for an oral presentation at High Performance Switching and Routing 2008 (HPSR2008).

Sho Shimizu, Taku Kihara, Yutaka Arakawa, Naoaki Yamanaka and Kosuke Shiba,
“A prototype of a dynamically reconfigurable processor based off-loading engine for accelerating the shortest path calculation with GNU Zebra”

Mr. Tsuji, Mr. Miyagi and Mr. Usui will make a presentation at the IEICE Technical Meeting on Photonic Network in March.
The titles and authors are as follows.

03/13,14 Technical Meeting on Photonic Network @Ohama Nobumoto Memorial-Hall(Okinawa, Ishigakijima)

Authours : Tomohiro Tsuji, Mikio Kaneko, Yutaka Arakawa, Satoru Okamoto, Naoaki Yamanaka
Title : Study and Implementation on P2P based Contents Delivery Network System using Cooperation of Server and Clients
Abstract : Although CDN(Contents Delivery Network) is the remarkable network to transmit multimedia contents fast, it could not reduce the download time for rich contents such as HDTV(High Definition TeleVision). So, we implemented the P2P based Contents Delivery Network System that download contents from not only the Contents Server but also Clients who finished downloading the contents. To select the download site, we send Pings to the list of download site, and then select the download site which has the shortest RTT. But, in this implementation requests from Clients flock to the download site which has the shortest RTT, because the download site has been selected only by Client side. As a result, there are possibility that download time deteriorates. In this paper, we propose a “P2P based Contents Delivery Network System using Cooperation of Server and Clients” which is aiming for load-balancing by adjusting the candidates of download sites given to the client at the server side, and by restricting the number of maximum connections of each candidate. The performance of our proposed methods and the prototype system are evaluated by computer simulations. As a result, we showed that the contents delivery time of our proposals are reduced up to 40%compared to the prototype system.

Authours : Hiroyuki Miyagi, Yusuke Okazaki, Ryota Usui, Yutaka Arakawa, Satoru Okamoto, Naoaki Yamanaka
Title : Performance Evaluation of Grid Computing Using Parallel Data Link
Abstract : In a grid computing environment, a task is divided into multiple processes and the processes are distributed to multiple processing nodes via networks. The network characteristics such as bandwidth and latency affect the task performance. In recent years, with the growth of wide area network technologies, various grid applications are developed and the requirement for bandwidth of wide area networks becomes large and it reaches more than 100Gbps.
In this paper, we focus on parallel data links, such as link aggregation, to make bandwidth higher. By experiments, the performance of grid computing using parallel data links is evaluated.

Authours : Ryota Usui, Motomi Akagi, Hiroyuki Miyagi, Yutaka Arakawa, Satoru Okamoto, Naoaki Yamanaka
Title : The Experiment of Inter Service Parts Connection Techniques for Ubiquitous Grid Networking Environment (uGrid)
Abstract : With the advance of ubiquitous society, we asuumes that an environment in which everything is connected to networks will come. We define a ubiquitous grid networking environment (uGrid) as follows: uGrid is an environment that everything all over the world can be defined as a service parts, it is possible to search for the
service parts of the desire from all service parts in the world, those searched service parts are combined through the network and users can enjoy their desired service. In the uGrid, user uses other user’s device when user connect to service parts. Therefore, it is necessary to control with the device on the connected user side concerning the communication from others. In this paper, to realize the ubiquitous grid networking environment (uGrid), we implement the experiment of inter service parts connection techniques that USB over IP device is controlled by Proxy.

Mr. Kasahara presented OSS network system experiment results at the OFC2008.

OFC2008 OMO4
Title: “GMPLS-Based High-Speed Optical Slot Switching System Using PLZT Ultra-High Speed
Optical Switch for HDTV Contents Delivery Network”
Authors: Teruo Kasahara, Tomohiro Tsuji, Daisuke Ishii, Yutaka Arakawa, Satoru Okamoto, Hiroyuki Tsuda, Naoaki Yamanaka (Keio University), and Keiichi Nashimoto (Epi Photonics)

Mr. Irie made a presetation at Technical Meeting in February.
The titles and authours are as follows.

02/14,15 Technical Meeting on Information Networks @Kagawa University

Authours : Kazuki IRIE, Yutaka ARAKAWA, Satoru OKAMOTO, and Naoaki YAMANAKA
Title : A Study on Scheduling and Multicast for Contents Delivery
Abstract : With the growth of high speed networks based on FTTH, the amount of large-size files, such as moviesand music files, transmitted over the Internet has been increasing. However, as the number of the users whdownload large-size files is increasing, the network bandwidth and the processing capabilities of contents servers are inadequate. So there is a possibility that transmitting of high popularity contents will be heavily-loaded and network congestion will occur. We propose a scheduling and multicast method for contents delivery service to reduce the load of contents server and network congestion. In our proposed method, the timing of transmitting contents is force to delay when many users access the large-size contents at the same time. Furthermore, the method of transmitting contents is switched from unicast to multicast and multicast delivery interval is scheduled. Also we evaluate the multicast delivery interval based on the contents size and the number of access by computer simulation and the result shows that the download time is reduced.

Mr. Ishikawa made a presentation at Technical Meeting in January.
The titles and authours are as follows.

01/16,17 Technical Meeting on reconfigurable system @Keio University(Kanagawa)

Authours : Hiroyuki Ishikawa, Sho Shimizu, Yutaka Arakawa, Naoaki Yamanaka, Kousuke Shiba
Title : Fast calculation method of Set Cover Problem on parallel reconfigurable processor DAPDNA-2
Abstract : This paper proposes a fast calculation method of the set cover problem, which is implemented on reconfigurableprocessor DAPDNA-2 of IPFlex Inc. Content replication is a widely employed technique to improvethe performance of large-scale content distribution systems. Replica placement method is derived from the set coverproblem which is known to be NP-hard. It is difficult to caluculate the large-scale set cover problem on a program counter-based processor. Our proposed algorithm divides the combination optimally and performs pipeline operation.Experimental results show that the proposed algorithm reduces the execution time by 40 times compared to Intel Pentium 4 2.8GHz.

Mr. Kikuta made a presentation at Technical Meeting in December.
The titles and authours are as follows.

12/20,21 Technical Meeting on Photonic Network@Chiba University (Chiba)

Authours: Kou Kikuta, Daisuke Ishi, Satoru Okamoto, Naoaki Yamanaka (Keio Univ.)
Title: An Experiment of GMPLS Controlled Gigabit Wide Area Ethernet
Abstract: We implemented the Gigabit Ethernet Networks controlled by GMPLS for Wide Area Ethernet. InWide Area Ethernet, multiple path can be established by VLAN tag based switching, but we should control a networkby setting up the VLAN properly. In this Implementation, we realized automatic control of VLAN configure,and confirmed establishing and disconnecting the path.

Prof. Bijan Jabbari lectured on Jan.8 for GCOE.
Prof. Bijan Jabbari is from Geroge Mason University in U.S.
He gave us a lecture on “Internet and MPLS Research in GMU”.

After the lecture, we showed Prof. Jabbari demonstrations of our research topics.

Pictures are here.