course materials for 10-17-2009

• Cloud Computing, examples

9-26-2009 course materials

• Mobile Social Services for People with Disabilities
  
• Anomaly detection
• Mobile Services

materials for 9-19-2009

Introduction to wireless futures.

Presentations on Dec 13

12/13
Mobile Computing for Indoor Wayfinding Based onBluetooth Sensors for Individuals with Cognitive Impai Rments, Gordon
Using participatory activities with seniors to critique, build, and evaluate mobile phones, 9678609 古展宇

ps. Due to the long weekend, the class on Jan 3 is canceled.

Student Presentation on Dec 6

A General Architecture of Mobile Social Network Services, Petry

Observing Sara: a case study of a blind person's interactions with technology, Cosmo

Student Presentation in December

12/6

A General Architecture of Mobile Social Network Services, Petry

Observing Sara: a case study of a blind person's interactions with technology, Cosmo

12/13

Mobile Computing for Indoor Wayfinding Based onBluetooth Sensors for Individuals with Cognitive Impai Rments, Gordon

Using participatory activities with seniors to critique, build, and evaluate mobile phones, 9678609 古展宇

12/20

"Understanding mobile phone requirements for young adults with cognitive disabilities" Edgar

Methodology and Evaluation of Teaching Computer Programming Laboratory with Social Media, Armstrong

Ontology-based Personalized Wayfinding System Using Deviation Detecting for Individuals with Cognitive Impairments, JianPing

12/27

A Novel Wayfinding Systems Based on Passive RFID for Individuals with Cognitive Impairment, Kelvin

Intersection Location Service for Mobile Ad Hoc Networks with Cars in Manhattan Style Movement Patterns, Ida

Action Science Approach to Context Aware Personalized Housing Services using Web 2.0 Mapping Tools- A Nonprofit Case Implementation, Jonna

11/29/2008 Student Presentations

Yao-Jen Chang, Hsin Yu Hsu, Wan Chih Chang, Shu-Min Peng, Yan-Ru Chen, Tsen Yun Wang Context-aware "Task Prompting: Sustaining of Supported Employment for People with Severe Mental Illness," to be presented in 2009 International Conference on Communications and Mobile Computing, Jan. 2009 (EI)

Yao-Jen Chang, Yao-Sheng Chang, Chiu-Hui Chen, "Assessing Peer Support and Usability of Blogging" in proc. of ICCIT 2008, Busan, Korea. Nov 11~13, 2008 (EI)

Discussions: Business Models

Nokia Launches Dual-Mode 6136 Flip PhoneWi-Fi Cell Phone T-Mobile Ready

1. With voice revenue slowly declining, operators are looking towards content to make up the difference.
2. They're banking on dual-mode convergence as one tool to do so.
3. The additional bandwidth of a Wi-Fi network should encourage mobile subscribers to use more data services, such as Web, e-mail, MMS, music, video, handset TV, etc."

Metropolitan Wireless

11/22 Class

I will attend a Parent-Teacher meeting from 11:40. Therefore, our class will start from 1:30 p.m.

Mr. Ma will do a student presentation hosted by Wan Chi Chang.

11/22: Topics

• Presentations at ICCIT 2008, Busan, Nov 11~13 (3/3...
• Presentations at ICCIT 2008, Busan, Nov 11~13 (2/3...
• Presentations at ICCIT 2008, Busan, Nov 11~13

OFDMA and WiMAX Technology

OFDMA and WiMAX Technology (slides)
Delay Spread

11/1 Spread Spectrum

Spread Spectrum, an in-depth introduction

11/1 OFDMA and WiMAX Technology

OFDMA and WiMAX Technology (slides)

delayed

Technology beyond 3G

From 2G, 2.5G, 3G (IMS, IP Multimedia Subsystem), 3.5G/HSDPA, to 4G

Computer Communications (IT), IP-based, WiFi (Data Comm.), VoIP

Data Services

• GSM, Circuit Switching, 9.6 (*2), 12.4(*2, HSCSD)
• GPRS, General Packet Radio Services, Packet Switching, 9.05 kbps/13.4 kbps (*1,2,3,4), speed denoted as *u*d
• EDGE, 3 times of speed of GPRS by using 8-PSK instead of binary GMSK
• 3G, 384kbps, up to 2 Mbps, uplink is 128 kbps
• 3.5G HSDPA (High Speed Downlink Packet Access) 8-10 Mbps (R5), and 20 Mbps (R6) by MIMO, uplink is 384 kbps

Chips supporting HSDPA

OFDMA and WiMAX Technology (slides)

WiMAX vs. HSDPA

• similar:Handover, Multimedia (<>
• difference: physical, initial cost, TCO (Total Cost Ownership)

4G communication at 100 Mbit/s while moving, and 1 Gbit/s while stationary.

Pervasive networks

• simultaneously connected to several wireless accesstechnologies (Wi-Fi, UMTS for example) and can seamlessly move between them (handover)
  
• smart-radio aka cognitive radio technology to efficiently manage spectrum use and transmission power
• mesh routing protocols
• 4G may use OFDM , and also OFDMA.
• packet switching only

In general, a generation is defined by the result of technology changes over a 10-15 year time frame. Thus, 4G would refer to whatever is deployed in the 2010-2015 period, assuming 3G deployment spans the 2000-2009 period.

See

• Wikipedia 4G
• 3GPP LTE
  

cellular technology

Summary in slides

1. Start of the cellular technology, the need for new commercial applications of wireless

2. the bottleneck of capacity

3. Examine capacity of FDMA, TDMA, and CDMA

• TDMA:FDMA 7(theoretically), 3(practically)
• CDMA:FDMA 40(theoretically), 10 (practically)

4. Why cellular is better than broadcast?

5. Digital wireless with TDMA, CDMA

• advanced of digital ICs
• price drop

6. Major issues with CDMA

near-far field effect

hand-off

7. and their solutions

• Power control
• soft handoff

8. Make use of dead time in telephone conversations, about 65% of the time

• variable-rate coder

reference: Chap. 1~Chap. 6, Dave Mock, the Qualcomm Equation, AMACOM, 2005

Discussions for Sep. 27, 2008

It would be great if you can read the following materials before class meets.

Evolutions of Cellular Phones (continued from last week), Cloud Computing

latest stuff:

• Google Browser Google Chrome
• Serious potential in Google's Browser
• Browser market share
• Google's dream, Apple's nightmare?
• Gordon's summary of Lee's talk on cloud computing
• Edgar's questions for cloud computing

Sep. 20, 2008 slides download address

Evolutions of Cellular Phones by Nokia

6/14, 6/21 no class

1. 6/14 is CYCU commencement.
2. There is no class after 6/20 according to the campus calendar.
3. 6/7 will be our last session for this semester.

5/31 presentations

Tentative list

15. 張晏瑜 (5/31)

18. Anthony

If you plan to go to the wedding or cannot show up due to other reasons, please write below so that I can reschedule it.

Class meeting on 5-24-2008

For student presentation, please check out the update.