eDevelopment

Michael L. BestLeandro BurnesMarco EscobedoHani Shakeel

Technologies to empower, enrich and interconnect

Pilot Project - Bohechio Village Area Network

March of 2001

Agenda

• Bohechio, Dominican Republic• Village Area Network• Equipment• Network Coverage• Results of Deployment• Immediate Applications• Future Applications• What’s Next • Pictures• Q & A

Bohechio, Dominican Republic

• Located in the center of the

Dominican Republic.

• Population is approximately

10,000 people.

• Main economic activities are

agriculture and livestock.

• Prior to Wireless Village Area

Network, only 5 telephone lines.

Village Area Network

• 256 kps VSAT connection at Lincos Container.• Point to Point Link between Lincos and Base Station.

• Omni-directional antennas placed at Base Station.• Point to Point link to Lincos.

Equipment

• 4 - Omni-directional 19dbi antenna• 2 - PtP 24dbi antenna• 8 - 11mbps Gold PC Cards• 1 PCI Adapter• 1 COR and 1 ROR(1 COR can support 16 RORs on one Channel, and 3 collocated channels are possible.) • Orinoco Client and AP manager software• 1 UPS• 1- 5dbi antenna and 1 Yagi 14dbi antenna for tests

Results of Deployment

Tests conducted with:• 5dbi and 14dbi Antennas• Orinoco Client Manager - Link Test Software

Results of Deployment

2

1

3

4

5

6

7

8

9

10

11

11 Coverage:

• PC Cards ~2dbi Antenna

• 5dbi Antenna

• 14dbi Yagi Antenna

Site # Location Dist. (ft)1 Lincos Front Park 2382 Lincos Container 2893 Police Station 3224 School 3645 Ensanche Castillo 8406 Rural Clinic 9457 Ensanche Castillo 10508 Water Tanks 15229 Lago Sabana (west) 1575

10 South Bohechio 157511 Bohechio North 183712 River South Bohechio 351713 Road to Bohechio 4252

Network Coverage

Distance vs SNR

0

5

10

15

20

25

30

Distance (ft)

SN

R (

dB

i)

SNR (dBi)

• 1st Wireless Village Network • Roughly 3500 feet• LOS• Fixed vs. Mobile

Immediate Applications

• Lincos, School, Clinic and Municipal Building

Immediate Applications

• IP Telephony

Future Applications

• Mobile VoIP and Radio Bohechio

What’s Next

• School Connectivity - April 2001• Telecenters • Better and cheaper antennas - wearable?• Expand mobility based applications

Pictures

Question and Answer

Contact Information:

• Edevelopment Group

• The Media Laboratory

• Massachusetts Institute of Technology

• Room E15-309

• 20 Ames Street

• Cambridge, MA 02139 USA

• http://edevelopment.media.mit.edu/