讲座名称：Scalability and Liquidation Enhancement in QoS Lightning Networks
讲座人：吴杰 教授
讲座时间：3月26日10:00
讲座地点：ZOOM会议直播（会议ID:https://temple.zoom.us/j/7348129717）
讲座人介绍：
吴杰博士是天普大学网络计算中心的主任和Laura H.Carbell教授。他还担任科学技术学院国际事务主任。他于2009年夏季至2016年夏季担任天普大学计算机和信息科学系的系主任，并于2015年秋季至2017年夏季担任国际事务副总教务长。在加入天普大学之前，他是美国国家科学基金会的项目主任，也是佛罗里达大西洋大学的杰出教授。他目前的研究兴趣包括移动计算和无线网络，路由协议，云和绿色计算，网络信任和安全，以及社交网络应用。他在多个编辑委员会任职，包括IEEE移动计算期刊，IEEE服务计算期刊，并行和分布式计算杂志以及计算机科学与技术杂志。吴博士曾担任IEEE MASS 2006，IEEE IPDPS 2008，IEEE ICDCS 2013，ACM MobiHoc 2014，ICPP 2016和IEEE CNS 2016的共同主席，以及IEEE INFOCOM 2011和CCF CNCC 2013的program联合主席。他是IEEE计算机协会特邀访问者，ACM杰出发言人和IEEE分布式处理技术委员会（TCDP）主席。吴博士是AAAS Fellow和IEEE Fellow。他是2011年中国计算机学会（CCF）海外杰出成就奖的获得者
讲座内容：
The lightning network (LN) is a special network in Bitcoin that uses offchain micropayment channels to scale the blockchain’s capability to perform instant transactions without a global block confirmation process. However, micropayment scalability in a large LN and liquidation for small nodes still remain major challenges for the LN. In this talk, we introduce the notion of supernodes and the corresponding supernodes-based pooling to address these challenges. In order to meet the high adaptivity and low maintenance cost in the dynamic LN where users join and leave, supernodes are constructed locally without any global information or label propagation. Each supernode, together with a subset of (non-supernodes) neighbors, forms a supernode-based pool. These pools constitute a partition of the LN. Additionally, supernodes are self-connected. Micropayment scalability is supported through node set reduction as only supernodes are involved in searching and in payment with other supernodes. Liquidation is enhanced through pooling to redistribute funds within a pool to external channels of its supernode. Simulations have been conducted to validate the improvement in routing scalability and liquidation of the proposed architecture under different settings.
主办单位：通信工程学院
