Prof. Danny H.K. Tsang ECE, HKUST • Joined HKUST in May 1992 • For contribution to the optimization of communications networks • Research on efficient delivery of multimedia traffic over different networks •ATM networks •CDN and P2P networks •WiFi networks (IEEE 802.11e) •Optical networks (SONET/SDH) • Invent 64B/65B encoding in 2000 • In 2001, the invention was adopted by the International Telecommunication Union (ITU - 國際電信聯盟)’s Generic Framing Procedure recommendation GFP-T (ITU-T G.7041/Y.1303) • In 2005, the invention obtained a US Patent number 6,952,405 64B/65B Encoding • Fiber Channel and Gbit Ethernet (以太網) use 8B/10B encoding to achieve clock synchronization (only 80% efficiency or 20% bandwidth waste) • In 8B/10B, there are a total of 256 possible data and 12 possible controls (i.e., a total of 268 possible data/controls) The 64B/65B Invention • For the delivery of 8B/10B data/controls over SONET/SDH, we take advantage of SONET/SDH having very accurate clock, and we just propose an efficient method to represent the 268 possible data/controls • Achieve an efficiency of 64/65 (98.5% efficiency or 1.5% bandwidth waste) • Less bandwidth waste less network congestion happier users