Design and Implementation of GMPLS-basd Optical Slot Switching Network with PLZT High-speed Optical Switch Teruo Kasahara, Masahiro Hayashitani, Yutaka Arakawa, Satoru Okamoto and Naoaki Yamanaka Dept. of Information and Computer Science, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan Email: kasa@yamanaka.ics.keio.ac.jp Abstract— In this paper, we propose a new optical network architecture, called Optical Slot Switching (OSS), suitable for large data transmission where we use PLZT optical switch controlled by GMPLS(Generalized Multi- Protocol Label Switching). PLZT ultra-high speed optical switch can improve the bandwidth efficiency by reducing the guard time between data compared with the conven- tional optical switch. In OSS network, user dynamically establishes the path and can transport a large size data efficiently by using reserved slots in a moment. Through the experimental results, we show that our proposed OSS is suitable for large data transmission. I. I NTRODUCTION The IP traffic in the network increases rapidly by the speed-up of the access network and the spread of the P2P application in recent years, and the demand for the high-speed mass forwarding technology has risen. In optical network, a high technology and the control of an optical device is important. MEMS (Micro Electro Mechanical Systems) is widely used from the viewpoint of practicality in optical network such as OCS (Optical Circuit Switching), OBS (Optical Burst Switching) [1] and so on. On the other hand, a high-speed optical switch was actively researched in recent years. Then, PLZT high speed optical switch was realized by Nozomi Photonics Co.,Ltd. in 2005 [2]-[4]. The PLZT optical switch enable to switch its output port with under 10 nsec, and can improve the bandwidth utilization by reducing the guard time between data transfer unlike the MEMS switch. It became possible to think about more efficient network architecture by the appearance of PLZT optical switch. In this paper, we propose quite new network archi- tecture with PLZT optical switch, named Optical Slot Switching (OSS). One user is allocated a shared band- width in conventional architecture, on the contrary one user is allocated all bandwidth in a slot, which is divided into the slot, in proposed architecture. Using PLZT high- speed optical switch greatly decreases the guard time, and makes possible the idea of slot which was non- practicable with the MEMS switch. By allocating all bandwidth in a slot to one user, simple and transparent data transfer is achieved. Since the multiplexing is not done like the TDM (Time Division Multiplexing), the protocol is free in the allocated slot. In the proposed network, there are frames composed of two or more slots, which is a minimum unit of the data transfer, and each link is assumed for synchronization to be taken. One user reserves a bandwidth in slot by TDM- LSP (Time Division Multiplexing-Label Switched Path) scheme in RSVP-TE (Resource ReserVation Protocol- Traffic Engineering)[5]. Unlike TDM, GMPLS enables the slot switching network to reserve and release slots dynamically, periodically and continuously, and it real- izes the distributed control of optical switches in the network. These remaining sections of this paper are organized as follows. Section II describes the design of OSS net- work architecture, Section III shows the implementation of the experimentation of the OSS network. Section IV describes the demonstration of the OSS network, and Section V summarizes the current progress of the OSS network. II. OPTICAL SLOT SWITCHING (OSS) ARCHITECTURE A. Requirement In proposed architecture, we aim at an efficient bulk data transmission. However, it is necessary that it doesn’t disturb other data transfers and fill the multi user’s connection request simultaneously. On the other hand, it is needed that the network deals with the multimedia data transfer. Figure 1 shows the image of multimedia multiplexing in the Slot Switching. In proposed network, user get some number of fixed length slot, so in the reserved slots; any data transfer can be done transparently. Our proposed architecture can deal with various types of data, Ethernet packet, TDM Data and Analog signal. B. Architecture Figure 2 shows the proposed network. This network consists of two different networks, one is usual asyn- chronous optical network and the other is Optical Slot