演講公告
新聞標題: ( 2020-12-15 )
演講主題:Random and Deterministic Schemes for a Collision Channel without Feedback
主講人:羅元勳教授 (屏東大學 應用數學系)
演講日期:2020年12月22日(二) 14:00 –15:00
演講地點:(光復校區) 科學一館223室
茶會時間:當天下午13:30 (科學一館205室)
摘要內容:
Abstract
There are two main medium access control (MAC) approaches to a slot-synchronous collision channel without feedback: random (slotted ALOHA) and deterministic (protocol sequence-based) schemes. Unlike the traditional slotted ALOHA, protocol sequence-based scheme is a deterministic way to guarantee a positive individual throughput within an expectable period of time, even the time synchronous is hard to be achieved. In the first part of this talk, I will survey some results on protocol sequence-based schemes, including user-irrepressible (UI) sequences and conflict-avoiding codes (CACs), which have some interesting combinatorial structures. Then, for a fair comparison, deadline-constrained slotted ALOHA schemes will be introduced to maximize the probability that a packet can be successfully received within an pre-assigned deadline. Some recent progress including the uniqueness of the optimal transmission probability that maximizes the successful delivery probability under multiple-packet reception (MPR) technology is addressed as well.相關檔案:Talk_1091222.pdf