Hirochika Asai is a researcher at Preferred Networks, Inc.
He received his Ph.D degree from Graduate School of Information Science and Technology,
the University of Tokyo in 2013.
Name: Hirochika Asai
Born in 1985, Aichi, Japan
Researcher at Preferred Networks, Inc.
E-Mail: panda __at__ wide.ad.jp
(Please replace "__at__" with "@")
April, 2017–current: Researcher at Preferred Networks, Inc.
2014–: Board member of WIDE Project
April, 2013–March, 2017: Project Assistant Professor at the University of Tokyo
March 2013: received a Ph.D degree in Information Science and Technology from the University of Tokyo
(also received an award from the Dean of Graduate School of Information Science and Technology・情報理工学系研究科研究科長賞受賞)
March 2010: received a Master of Information Science and Technology degree from the University of Tokyo
March 2008: received a B.E. (Bachelor of Engineer) degree from the University of Tokyo
Internet topology and traffic measurement and analysis
Hirochika Asai, "Palmtrie: A Ternary Key Matching Algorithm for IP Packet Filtering Rules," ACM CoNEXT 2020, Virtual Barcelona, Spain (online), pp.323–335, December 1–4, 2020 [PDF]
Hirochika Asai, "Deep Pipelining: Efficient Pipelining of Network Function Chains with Coroutines," IEEE NetSoft 2019, Paris, France, June 24–28, 2019, pp.324–332, 2019
Hirochika Asai, "Efficient Multicore Scaling in Software Packet Forwarding Engines," IEEE NetSoft 2018, Montreal, Canada, June 25–30, 2018, pp. 283–287, 2018
Keiichi Shima, Daisuke Miyamoto, Hiroshi Abe, Tomohiro Ishihara, Kazuya Okada, Yuji Sekiya, Hirochika Asai, and Yusuke Doi, "Classification of URL bitstreams using Bag of Bytes," First International Workshop on Network Intelligence (NI 2018), Paris, France, February 19, 2018
Motomu Utsumi, Hirochika Asai, and Hiroshi Esaki, "Spatio-Temporal Modeling of BGP Routing Table Evolution," The 12th International Conference on Future Internet Technologies, Fukuoka, Japan, June 15—16, 2017
Kensuke Fukuda, Hirochika Asai, and Ken-ichi Nagami, "Tracking the Evolution and Diversity in Network Usage of Smartphones," ACM Internet Measurement Conference 2015, pp. 253–266, 2015
Hirochika Asai, Yasuhiro Ohara, "Poptrie: A Compressed Trie with Population Count for Fast and Scalable Software IP Routing Table Lookup," ACM SIGCOMM 2015, pp. 57–70, 2015 [pdf]
Hirochika Asai, "Where are the Bottlenecks in Software Packet Processing and Forwarding? Towards High-Performance Network Operating Systems," The Ninth International Conference on Future Internet Technologies, Tokyo, Japan, June. 19—20, 2014
Hirochika Asai, "P2V Migration with Post-copy Hot Cloning for Service Downtime Reduction," Third International Conference on Cloud and Green Computing (CGC), Karlsruhe, Germany, Sep. 30—Oct. 2, 2013
Hirochika Asai, Kensuke Fukuda, and Hiroshi Esaki, "Social Benchmarking of QoS & QoE in Cellular Data Networks," IEEE International Communications Quality and Reliability (CQR) Workshop, Marco Island, FL, USA, May. 14–16, 2013 (Best Paper Award)
Hirochika Asai, Kensuke Fukuda, and Hiroshi Esaki, "Traffic Causality Graphs: Profiling Network Applications through Temporal and Spatial Causality of Flows," 23rd International Teletraffic Congress, San Francisco, USA, Sep. 6–8, 2011
Hirochika Asai, Kensuke Fukuda, and Hiroshi Esaki, "Towards Characterization of Wireless Traffic in Coexisting 802.11a/g and 802.11n Network," ACM CoNEXT 2010 Student Workshop, Philadelphia, USA, Nov. 30, 2010 [pdf]
Hirochika Asai and Hiroshi Esaki, "Towards Interdomain Transit Traffic Reduction in Peer-assisted Content Delivery Networks," 14th International Telecommunications Network Strategy and Planning Symposium, pp. 95–100, Warsaw, Poland, Sep., 2010
Hirochika Asai and Hiroshi Esaki, "Estimating AS Relationships for Application-Layer Traffic Optimization," Springer's Lecture Notes in Computer Science Vol. 6236, 3rd Workshop on Economic Traffic Management, pp. 51–63, Amsterdam, The Netherlands, Sep., 2010 (Acceptance rate: ~29%) [link]
Hirochika Asai and Hiroshi Esaki, "AURORA: Autonomous System Relationships-aware Overlay Routing Architecture in P2P CDNs," Asia Future Internet summer school, Jeju, Korea, Aug., 2009 [pdf]
Hirochika Asai, "Analysis and Management of the Internet based on Data Flow Profiling," Ph.D thesis, March, 2013
Technical paper at the University of Tokyo (not open to public)
Hirochika Asai, Hiroshi Esaki, "Characterizing AS Relationships by Recursive Analysis of AS Adjacency Matrices,"
Creative Informatics, Graduate School of Information Science and Technology, the University of Tokyo, May 28, 2010
ISS Square 情報セキュリティ・スペシャリスト・サーティフィケート（ISSCertificate）
2015-04-09: “Networking Operating System from Scratch towards High-Performance COTS Network Facilities”
at IIJ-II seminar
2014–2015: Practical Research on Fast Routing Lookup Algorithm with NTT Communications
2014: Operating System Architecture for Fast Packet I/O with Alaxala Networks