A Case Study. Maths / Computing Department 1

Transcription

1 A Case Study Computer Science (CS) course offered by Math/Computing Department of University of the South Pacific (USP) using the Distance Teaching and Learning (DTL) mode. Maths / Computing Department 1

2 Semester one 2004 A post graduate course: CS493 Advanced Information Technology for Small Business with Open Sources JICA (Japan International Cooperation Agency, Suva office) UEC (University Electro Communication, Tokyo, Japan ) NICT (National institute of Information and Communications Technology) ARIB (Association of Radio Industries and Business) CRL ( Communication Research Laboratory) Maths / Computing Department 2

3 CS493 - CS Post graduate course offered live via satellite from Japan (University of Electro Communications). Maths / Computing Department 3

4 Outline Technology utilized Creation of Distance Teaching and Learning (DTL) environment Observations made Maths / Computing Department 4

5 Technology utilized (at USP s end) The latest current technology IP based network Satellite SuperBird-C Satellite receiving dish Satellite router Switches / hubs Pologom digital camera DHCP server Local Area Network (LAN) of 20 computers Maths / Computing Department 5

6 IP based network Modern digital technology allows different sectors, e.g. telecom, data, radio and television, to be merged together. This occurrence is drastically changing the way in which both people and devices communicate. At the center of this process, forming the backbone and making convergence possible, are IP-based networks Maths / Computing Department 6

7 Communication Technique circuit-switched network packet-switched network techniques Maths / Computing Department 7

8 Different network techniques for establishing communication between nodes on a network the circuit-switched network used in a traditional telephone system creates a closed circuit between two nodes in the network to establish a connection. established connection is thus dedicated to the communication between the two nodes packet-switched network techniques used in IP-based networks Messages are first divided into packets containing the destination address. Then, each packet is sent over the network with every intermediate node and router in the network determining where the packet goes next. A packet does not need to be routed over the same links as previous related packets. Uses available capacity much more efficiently and minimizes the risk of possible problems, such as a disconnection Maths / Computing Department 8

9 Circuit Switch used in a traditional telephone system creates a closed circuit between two nodes in the network to establish a connection. established connection is thus dedicated to the communication between the two nodes Maths / Computing Department 9

10 Packet Switich used in IP-based networks Messages are first divided into packets containing the destination address. Then, each packet is sent over the network with every intermediate node and router in the network determining where the packet goes next. A packet does not need to be routed over the same links as previous related packets. Uses available capacity much more efficiently and minimizes the risk of possible problems, such as a disconnection Maths / Computing Department 10

11 Satellite Maths / Computing Department 11

12 Satellite SuperBird-C Hughes Space and Communications Company, today known as Boeing Satellite Systems, Inc., built a high-power Hughes 601 model spacecraft for Space Communications Corporation (SCC) of Japan. Joining a pre-existing two-satellite constellation, SUPERBIRD-C provides television signals and business communications services throughout Japan, southern and eastern Asia, and Hawaii using Ku-band frequencies. SUPERBIRD-C was successfully launched on July 27, 1997, aboard an Atlas IIAS launch vehicle from Cape Canaveral, Florida. Source: Maths / Computing Department 12

13 Satellite router routing device that integrates satellite RF and traditional land line Internet services into a single unit Switches / Hubs Pologom Digital Camera DHCP server Local Area Network (LAN) of 20 computers Maths / Computing Department 13

14 The Setup of USP UEC during Lecture Super Bird C USP Side UEC Side Polycom codec for the IP based lecture Sony codec for the IP based lecture Students Prof. Suzuki The lecture from Japan is projected onto the screen and the voice through the speakers The response from the students is viewed on a plasma TV. (audio and visual) Maths / Computing Department 14

15 Creation of Distance Teaching and Learning environment Classroom Distance lecturer Local Students Support facilities Maths / Computing Department 15

16 Students view the lecture which is projected onto the screen The Classroom USP Side Speakers provide the audio input of the lecture Polycom is connected via IP to the UEC side Lecture from Japan is recorded using a VCR Projector Projects the visual input onto the screen Students sitting in front of the computers which is also connected to the UEC. Maths / Computing Department 16

17 Distance lecturer Professor Mebo SUZUKI Maths / Computing Department 17

18 Local Students 22 enrolled students in CS493 for semester 0ne did on-line exam on June 8 th Maths / Computing Department 18

19 Support facilities Computer service support Content support Motivation Maths / Computing Department 19

20 Observations made The students enjoyed this course being offered through satellite mode, as it was their first time experience. Some indicated it was a unique experience. They also liked the assignments, especially web page development. Maths / Computing Department 20

21 Delay in setting up the satellite connection as it took considerable time. Have more classes per week. Maths / Computing Department 21