Three papers are summarized.
星期五, 11月 30, 2007
星期日, 11月 18, 2007
11-17-2007 Homework
繳交作業方式
Dec-1-2007 11:59 a.m. Due
1. Read the abstracts and skim the full papers, and then comment on the three papers.
特別提醒: 必須使用學校IP網域才可以下載，中原大學已經購買ACM所有出版品的電子下載權利。在學校上網下載就沒有問題。
Notice:
11/24/2007 - the midterm week. No class meeting. (停課ㄧ次)
Dec-1-2007 11:59 a.m. Due
1. Read the abstracts and skim the full papers, and then comment on the three papers.
特別提醒: 必須使用學校IP網域才可以下載，中原大學已經購買ACM所有出版品的電子下載權利。在學校上網下載就沒有問題。
Notice:
11/24/2007 - the midterm week. No class meeting. (停課ㄧ次)
12-1-2007 Talk Outline
OFDM (Text pp 2-55 ~2-87, Handout pp. 86-91)
1. Student Oral
P1: g9577601
P2: Claire
P3: Chen
ps: slides sample.
1. Student Oral
P1: g9577601
P2: Claire
P3: Chen
ps: slides sample.
星期一, 11月 12, 2007
CSMA
CSMA p-persisitent, 1-persistent
- offerer load vs. throughput behavior & mechanism (Textbook pp. 2-48~2-51)
- CSMA/CD improves performance
- drawbacks of CSMA/CD in long distance and high speed communications
- interference and noise
- Shannon Theory
- the need of modulation for practical communication enigineering
- nonlinear characteristics of modulation and reduction of nonlinear effects
- Optical communication
- Wavelength Division Multiplexing (WDM)
星期日, 11月 11, 2007
11-10-2007 Homework
In the talk, we introduced the evolution of contention based protocols:
1. ALOHA
2. CSMA (Carrier Sense Multiple Access)
3. CSMA/CD (collision detection) -> IEEE 802.3 (Ethernet, 100M, 1Gbps)
Problems:
1. Why does Pure Aloha perform worse than Slotted Aloha?
2. According to Textbook pp. 2-48~2-51, why does 1-persistent CSMA have lower throughput than non-persistent CSMA when generated traffic rate is higher than 1 (G>1)? Why does 1-persistent CSMA have shorter latency than non-persistent CSMA?
1. ALOHA
2. CSMA (Carrier Sense Multiple Access)
3. CSMA/CD (collision detection) -> IEEE 802.3 (Ethernet, 100M, 1Gbps)
Problems:
1. Why does Pure Aloha perform worse than Slotted Aloha?
2. According to Textbook pp. 2-48~2-51, why does 1-persistent CSMA have lower throughput than non-persistent CSMA when generated traffic rate is higher than 1 (G>1)? Why does 1-persistent CSMA have shorter latency than non-persistent CSMA?
作業繳交次數
10/20 作業為加分題，可以選做。其餘三次都必須完成。
作業繳交次數
9378612 2
9576615 3
9576617 4
9576619 3
9577601 0
9577606 2
9577608 2
9577611 4
9578602 1+2
9578621 3
9578627 0
9578630 0
9676603 0
9676608 3
9676617 3
9677604 2
9677606 3
9677612 2
9677613 1
9677614 3
9677615 1
9678607 4
9678608 3
作業繳交次數
9378612 2
9576615 3
9576617 4
9576619 3
9577601 0
9577606 2
9577608 2
9577611 4
9578602 1+2
9578621 3
9578627 0
9578630 0
9676603 0
9676608 3
9676617 3
9677604 2
9677606 3
9677612 2
9677613 1
9677614 3
9677615 1
9678607 4
9678608 3
星期五, 11月 09, 2007
先進網際服務系統
The language of this course is ENGLISH.
Advanced Internet Services and Systems will be one of my Spring 2008 courses. See a previous syllabus for Fall 2006.
I would like to elaborate more on Web 2.0, emerging dynamics and interactions of online communities, web services, and mobile Internet. When the updated syllabus is ready, I will post it.
Advanced Internet Services and Systems will be one of my Spring 2008 courses. See a previous syllabus for Fall 2006.
I would like to elaborate more on Web 2.0, emerging dynamics and interactions of online communities, web services, and mobile Internet. When the updated syllabus is ready, I will post it.
星期四, 11月 08, 2007
星期四, 11月 01, 2007
ASSETS 2007三篇分析行動載具使用者需求的論文
身為工程師，我們總是想到要實做出來才算完成ㄧ個研究，這次ACM ASSETS 2007 有三篇論文不約而同做需求分析，並沒有實做，反而是把分析本身做得很仔細，這是我們可以學習的。
身心障礙者使用這些科技可能會遭遇哪些問題，他們的需求是什麼? 透過這三篇深入的田野調查與洞見分析，我們或許可以更進入這個身障者的世界。
身心障礙者使用這些科技可能會遭遇哪些問題，他們的需求是什麼? 透過這三篇深入的田野調查與洞見分析，我們或許可以更進入這個身障者的世界。
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