location dependent query processor

Presented by Abhiroop Roy ChowdhuryAditi RoyAffan AhmedAmit SinghAnanya RoyAniket BiswasAnirban Nag

• Introduction• Location based services (LBS)• Location aware query(LAQ)• Location dependent query(LDQ)• LDQ processing• LDQP query translation• Architectural view – LDSM• Conclusion

Mobile technology- latest trend

User friendly app development

Easy answering of position

dependent queries

o Spatial queries- backbone of LBS

o Tool & branch of mobile query processing-SQP(Spatial Query Processing)

o Two types-

1. Location Aware Queries

2. Location Dependent Queries

o Dependency on user’s location

o Location is implicitly defined in the query

o Binding location to query referred as location binding

o Processing depends on data types:

Static data

Dynamic data

Middleware architectures – functions

Validation of query & requesting position determining service to provide location

Target data server converts query to correct format

Decomposing query & sending data to target server for processing

Combining results & formatting them

• Location dependent service manager-middleware architecture

• Supports service provider & wireless networks

• Caching & pre-fetching enriches functionality

CONCLUSION

• User friendly

• Advancement, popularity & profitable market in near future

• Not yet wide-spread

• Problems faced in processing of CLDQ(continuous location dependent queries)