Informative Maps on pda-phones


Methodology and Resources



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Chui (2006)
3. Methodology and Resources
3.1.1. Location Tracking
Though GPS can provide a high accuracy in positioning, it cannot be used in urban areas. According to Figure 7 about the comparison among different mechanisms for location tracking, MLES would then be the best solution. However, this new technology is still underdevelopment and requires testing. Hence, SIM tracking mechanism provided by SUNDAY LBS is used in the project Figure 11 [18]).
Figure 11 Solution diagram of SUNDAY LBS
The following methods provided by SUNDAY LBS web services [19] will be used.
getLocationXY
Functionality To retrieve the latitude and longitude of a mobile user using SMPP protocol Input (Figure 12)
- SMPP System ID
- SMPP Password

CS) Informative Maps on PDA-phones
Chui Pui Ling Page 25
- Mobile Phone Number Output (Figure 13) XML document (Figure 14) consists of
- Mobile Phone Number
- Latitude
- Longitude
- Cell Identity Accuracy Index
- Network Measurement Result Accuracy Index
- Date and time
- Timestamp
Figure 12 Parameters required for the input of getLocationXY
Figure 6 obtained from getLocationXY

CS) Informative Maps on PDA-phones
Chui Pui Ling Page 26
Figure 14 XML sample output from getLocationXY
node has an attribute called status. Status = 0 indicates a successful execution
through SMPP whilst other values (not equal 0) indicate errors occurrence. The
application calling this method would examine the node to get the location
information.

getGeoInfo
Functionality To retrieve the geographical information form SUNDAY LBS using SMPP according to the latitude and longitude provided, which maybe retrieved using getLocationXY Input (Figure 15)
- SMPP System ID
- SMPP Password
- Latitude
- Longitude Output (Figure 16) XML document (Figure 17) consists of
- District
- Sub-district
- Street name
- Building name in both English and BIG Chinese version

CS) Informative Maps on PDA-phones
Chui Pui Ling Page 27

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