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Prof. Danny H.K. Tsang ECE, HKUST

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)

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Prof. Danny H.K. Tsang ECE, HKUST

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  1. Prof. Danny H.K. TsangECE, 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

  2. 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 256possible 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

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