ECOC 2014, Cannes - France Mo.4.2.2 Switchless Elasti Flexgr E. Kosmatos (1) , T. O (1) University of Peloponnese, Ka (2) BT Polaris House, Martlesham Abstract: SERANO is a novel blocking due to spectral fragme analytical method for minimising Introduction Flexgrid and elastic-rate systems aiming to improve spectral effic dynamic adaptation to traffic volu Flexgrid networks today are emp route spectral slots transparently path. The WSS cannot provide f the-fly adaptation functions li carrier frequency; change of format to modify the optical ba may occupy and 3R regeneratio time. These functions are only electronic switch. To overcome these limitations, w to electronic switching, we Switchless Elastic Rate No architecture that provides for th as well as a number of networkin i) spectral slot conversion; ii) fin optical reach which is necessa tradeoff between distance a format in a multi-hop path defragmentation and iv) s interoperability which is impo different administrative domains spectral slot conversion is esse blocking because of the fre spectral slot expansions/contrac lead to similar blocking with the W The main building block of S bandwidth variable transponder work we elaborate this architect the framework for minimizing BVTs used as an essential st effective solution. SERANO Architecture To efficiently introduce BVTs in f these need to be packaged, by into sliceable bandwidth variab (S-BVTs) 4 . The S-BVTs subsystems, capable of handling flows dynamically. In SERA advantage of this novel subsyste c Rate Node (SERANO) Archit rid and Elastic Rate Networks Orphanoudakis (1) , C. Matrakidis (1) , A. Stavdas (1) , A raiskaki str., 22100 Tripolis, Greece; astavdas@u Heath, Ipswich, United Kingdom, IP5 3RE; andre flexgrid node architecture facilitating on-the-fly entation while extending the capacity-reach prod the number of the main building blocks which are s have emerged iency and allow ume changes 1,2 . ploying WSSs to y in a multi-hop or important on- ke: change of the modulation andwidth a flow on, at the same feasible via an without resorting propose the de (SERANO) hese operations ng functions like: ne tuning of the ary due to the and modulation h; iii) spectral system vendor ortant between s. In particular, ential to reduce equent flexgrid ctions that may WDM case 3 ; SERANO is the r (BVT). In this ure and provide the number of tep for a cost- lexgrid systems, means of PICs, le transponders are powerful g multiple optical ANO we take em and use it as a building block offering th currently missing in BV-ROA A schematic layout of the general architectural frame been previously repor application 5 , is illustrated in multi-granular switching no in the context of flexgri networks, we assume that a passing through the added/dropped by/towards by means of N I/O ports/fi Fig. 1. Each input fiber is te call “Optical Blade” which detail in the inlet. The first blade is an optical 1:N spli copies of the input signal at Each output is directly in card. A WDM card consis multiplexer, followed by an BVT under consideration i smaller inlet of Fig. 1 and receiver/tunable-transmitter back-to-back whilst a buffe for synchronization purpos also has an M:1 coupler, po operates as a combiner, number of flows a particu forward to a particular outp stage of SERANO, the o cards are passively recomb Fig. 1: Overview of the SERANO a tecture for A. Lord (2) uop.gr ew.lord@bt.com reduction in network duct. We present an e BVTs. e functionality that is ADMs. SERANO node, the ework of which has rted for another Fig. 1. Following the ode design approach id and elastic rate a fraction of the traffic BV-ROADM is the SERANO block bres as illustrated in erminated to what we is shown in greater t stage of the optical itter creating multiple all coupler’s outputs. terfaced to a WDM sts of an optical de- S-BVT array. The S- s also shown in the consists of a fixed- r pair connected er is also provisioned ses. The WDM card ossibly amplified, that M being the upper ular input fiber may put fiber. In the final outputs of the WDM bined by means of a architecture Page 1/3