PPT-A Simple Scheme for Relative Time Synchronization in Delay

Masahiro Sasabe and Tetsuya Takine Osaka University Japan 1 DTNRG at IETF 76 Outline Research background Time synchronization Time sync for mobile ad hoc networks Relative time synchronization. Macroprogramming. Systems. Presented by: S. M. . Shahriar. . Nirjon. Timothy W.. . Hnat. and . Kamin. Whitehouse. hnat@cs.virginia.edu, WHITEHOUSE@cs.virginia.edu . Motivation. Synchronization Problems. Rui. . Gu. , . Guoliang. . Jin. , . Linhai. Song, . Linjie. Zhu, Shan Lu. University . of Wisconsin – Madison, USA. Proper Thread Synchronization . is . Hard. Very easy to get things wrong. H. ard-to-find concurrency bugs(Data race, Atomicity Violation, Dead Lock). Marc S. . Orr. †. §. , . Shuai . Che. §. , Ayse Yilmazer. §. ,. Bradford . M. . Beckmann. §. , Mark . D. . Hill. †. §. , . David A. . Wood. †. §. †. UW-Madison, . §. AMD . Research. ASPLOS, March 16, 2015. : crafting graph schemes in Stata. Tim Morris . MRC . Clinical Trials Unit at UCL. 7 Sep 2017. Two poets. By . all means break the rules, and break them beautifully, deliberately and well. .. – Robert . Kaushik. . Majumdar. Indian Statistical Institute. 8th Mile, Mysore Road. Bangalore 560059. https://sites.google.com/site/isicng/. Workshop on “Cognition, Emotion and Computing,” Infosys Limited, Bangalore, 30 April 2013. - “Peter is the student” “. He. . comes from Glasgow”:. “Peter is the student . WHO comes from Glasgow. ”.. - “The books are on the table” “. They. are mine”:. “The books . : crafting graph schemes in Stata. Tim Morris . MRC . Clinical Trials Unit at UCL. 7 Sep 2017. Two poets. By . all means break the rules, and break them beautifully, deliberately and well. .. – Robert . Wenjie. . Zhou (. Co-Primary Author. ), . Dong Li (. Co-Primary Author. ), . Kannan. . Srinivasan. , . Prasun. . Sinha. 1. Enterprise Networks. 2. Important research topics:. Channel assignment. AP association. Tan. 2*. . David Yau. 1,3. 1. Advanced Digital Sciences Center (ADSC), Illinois at Singapore. 2. Nanyang Technological University, Singapore. 3. Singapore University of Technology and Design; . in Wireless Sensor Networks. Philipp Sommer. Roger Wattenhofer. Time Synchronization is a well-studied Problem. Time, Clocks, and the Ordering of Events in a Distributed System. L. Lamport, Communications of the ACM, 1978.. Marc S. . Orr. †. §. , . Shuai . Che. §. , Ayse Yilmazer. §. ,. Bradford . M. . Beckmann. §. , Mark . D. . Hill. †. §. , . David A. . Wood. †. §. †. UW-Madison, . §. AMD . Research. ASPLOS, March 16, 2015. Dr. Yanqing Zhang. Agenda. Overview. Synchronization Techniques. WebDAV(Web Distributed Authoring and Versioning). Future Work. References. What is Synchronization?. In general it is . process of precisely coordinating or matching two or more activities, devices, or processes in time.. Professor Hugh C. Lauer. CS-3013, Operating Systems. (Slides include . copyright materials . Modern . Operating Systems. , 3. rd. ed., by Andrew Tanenbaum and from . Operating System Concepts. , 7. th. Time and Clock Time and Clock Primary standard of time = rotation of earth De facto primary standard = atomic clock (1 atomic second = 9,192,631,770 orbital transitions of Cesium 133 atom.