ANALYSIS AND SYNTHESIS OF OPTICAL BURST SWITCHED NETWORKS Li 1. shuo Supervisor: Prof. Moshe Zukerman Co-supervisor: Dr Eric W. M. Wong Further Credits: Dr V Abramov, Dr. Meiqian Wang and Zhang Jianan Jan.06,2014
ANALYSIS AND SYNTHESIS OF OPTICAL BURST SWITCHED NETWORKS Li, Shuo Supervisor: Prof. Moshe Zukerman Co-supervisor: Dr. Eric W. M. Wong Further Credits: Dr. V. Abramov, Dr. MeiqianWang and Zhang Jianan Jan. 06, 2014 1
Outline B ackoround: Optical burst switching (OBS Bounds for blocking probability obtained by Overflow Priority Classification Approximation(OPCA)in OBS networks with deflection routin o Effective and ineffective utilizations in obs networks EBSL-a combination of Emulated-OBS(E-OBS) segmentation and least remaining hop-count first ( LRHF .Q&a
Outline Background: Optical burst switching (OBS) Bounds for blocking probability obtained by Overflow Priority Classification Approximation (OPCA) in OBS networks with deflection routing Effective and ineffective utilizations in OBS networks EBSL – a combination of Emulated-OBS (E-OBS), segmentation and least remaining hop-count first (LRHF) Q & A 2
Outline Background: Optical burst switching(ObS) o Bounds for blocking probability obtained by Overflow Priority Classification Approximation(OPCA) in OBS networks with deflection routing Effective and ineffective utilizations in OBS networks EBSL-a combination of Emulated-OBS(E-OBS segmentation and least remaining hop-count first (RHF) ●Q&A
Outline Background: Optical burst switching (OBS) Bounds for blocking probability obtained by Overflow Priority Classification Approximation (OPCA) in OBS networks with deflection routing Effective and ineffective utilizations in OBS networks EBSL – a combination of Emulated-OBS (E-OBS), segmentation and least remaining hop-count first (LRHF) Q & A 3
Optical networks Ever-increasing demand for higher bandwidth o Bandwidth intensive applications-voice over IP, video-on-demand Fast increasing number of Internet users Internet Users In the World Growth1995-2010 Solution: Optical data communication 1093 Use circuit switching( CS)& packet switching(PS) 248 Drawbacks 1990 0002005201 2015 Year CS: low bandwidth efficiency PS: buffer high energy consuming
Optical networks 4 Ever-increasing demand for higher bandwidth Bandwidth intensive applications – voice over IP, video-on-demand Fast increasing number of Internet users Solution: Optical data communication Use circuit switching (CS) & packet switching (PS) Drawbacks: CS: low bandwidth efficiency PS: buffer & high energy consuming 16 36 70 147 248 361 513 587 719 817 1018 1093 1262 1400 1530 1650 0 200 400 600 800 1000 1200 1400 1600 1800 1990 1995 2000 2005 2010 2015 Millions of Users Year Internet Users In the World Growth 1995-2010
Optical Burst Switching(OBS) OXC: optical cross-connect Packets Core Trunk a group of fibers Network Packet 2 connecting two OXCs Packet 4 Network A trunk Access Network Packet 1 Packet 2 ● Network Packet 3 Packet 4 Netw Packets with the same destination are aggregated at ingress nodes to form bursts A control packet is sent ahead of a burst to reserve wavelength channels along the transmission path hop b pp by hop ) Bursts may be dumped before reaching their destinations
Optical Burst Switching (OBS) OXC: optical cross-connect • Packets with the same destination are aggregated at ingress nodes to form bursts • A control packet is sent ahead of a burst to reserve wavelength channels along the transmission path hop by hop • Bursts may be dumped before reaching their destinations A trunk 5 Trunk: A group of fibers connecting two OXCs