星期日, 4月 30, 2006
WLAN Regulations
You can use this WLAN Link Planner for link budget, this reference for Part 15.247, and this EIRP calculator.
Installing Wi-Fi Antennas
Safety Advice- If you are mounting an antenna outdoors make sure you have fitted a lightning arrestor! The last thing you want is thousands and thousands of volts of the good stuff hitting your WLAN equipment and computer network.
Regulatory Advice - Make sure you are not exceeding the maximum power for WLAN networks. There is a limit of 20Dbi on all 802.11b equipment.
<full article>
Regulatory Advice - Make sure you are not exceeding the maximum power for WLAN networks. There is a limit of 20Dbi on all 802.11b equipment.
<full article>
星期六, 4月 29, 2006
4-29-2006 Reading Assignments about WMAN
Wireless Metropolitan Area Network (WMAN)
- WiMAX: Opportunity or Hype?
- Chapter 3 of Ad Hoc Wireless Networks 2004
星期六, 4月 22, 2006
4-22-2006 Reading Assignment about WLAN 802.11
- A Technical Tutorial on the IEEE 802.11 Protocol
- 802.11n: MIMO-OFDM
- 802.11
- Chapter 2 of Ad Hoc Wireless Networks 2004
802.11n: MIMO-OFDM
Chapter 15: A Peek Ahead at 802.11n: MIMO-OFDM 802.11 Wireless Networks: The Definitive Guide, Second Edition (PDF)
Quadrupling Wi-Fi speeds with 802.11n (Intel)
Airgo 240 Mbps
(Faster than wired)
Field Test Results
Quadrupling Wi-Fi speeds with 802.11n (Intel)
Airgo 240 Mbps
(Faster than wired)
Field Test Results
WiMAX: Opportunity or Hype?
link
WiMAX: Opportunity or Hype?
MICHAEL RICHARDSON
University of Colorado at Boulder - General
PATRICK S. RYAN
University of Colorado at Boulder, Interdisciplinary Telecommunications Program; Catholic University of Leuven (KUL) - Interdisciplinary Center for Law and Information Technology (ICRI)
WiMAX: Opportunity or Hype?
MICHAEL RICHARDSON
University of Colorado at Boulder - General
PATRICK S. RYAN
University of Colorado at Boulder, Interdisciplinary Telecommunications Program; Catholic University of Leuven (KUL) - Interdisciplinary Center for Law and Information Technology (ICRI)
星期四, 4月 20, 2006
Is Wi-Fi Roaming Really Seamless?
read this article
Although it takes only 68 ms to switch to an AP from another,
it can disrupt applications up to 5 seconds.
Although it takes only 68 ms to switch to an AP from another,
it can disrupt applications up to 5 seconds.
UMA Follow-Up
Placing F/MC Under Enterprise Control
F/MC Watch: VoIP Fallout from CTIA
- Alternative to UMA
F/MC Watch: VoIP Fallout from CTIA
- Kyocera demos dual-mode CDMA/Wi-Fi handset with Boingo
- Boingo partners with Kineto to extend UMA service to hotspots
星期一, 4月 10, 2006
星期日, 4月 02, 2006
Homework 4-1-2006 Mobile Social Software, Part 2
Pick the assigned service from the list.
Analyze the service based on
yjchang at cycu dot edu dot tw before next time we weet in class.
參閱簡報製作原則
如何使用線上學術資源
Analyze the service based on
- technology
- what it works
- business models
- trends
yjchang at cycu dot edu dot tw before next time we weet in class.
參閱簡報製作原則
如何使用線上學術資源
星期六, 4月 01, 2006
CSMA/CA & 802.11
802.11 PCF & DCF
802.11 RTS & CTS
802.11 QoS
animations (two Applets about CSMA/CA Simulations)
http://wps.aw.com/aw_kurose_network_3/0,9212,1406346-,00.html
802.11 RTS & CTS
802.11 QoS
animations (two Applets about CSMA/CA Simulations)
http://wps.aw.com/aw_kurose_network_3/0,9212,1406346-,00.html
packet radio with Aloha
packet radio with Aloha in Lectures 13 & 14 of MIT Data Communication Networks Course
We will also cover the wireless location privacy protection as discussed in the paper by Schilit et al.
evolution of contention based protocols:
1. ALOHA
2. CSMA (Carrier Sense Multiple Access)
3. CSMA/CD (collision detection) -> IEEE 802.3 (Ethernet, 100M, 1Gbps)
We will also cover the wireless location privacy protection as discussed in the paper by Schilit et al.
evolution of contention based protocols:
1. ALOHA
2. CSMA (Carrier Sense Multiple Access)
3. CSMA/CD (collision detection) -> IEEE 802.3 (Ethernet, 100M, 1Gbps)