ELEC-E7120 Wireless Systems Final presentation by Group 2 Identifying ‘Bad’ Network Coverage Area Ashutosh Sharma (ID: 547725) Hamit Taylan YÜCE( ID: )

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Presentation transcript:

ELEC-E7120 Wireless Systems Final presentation by Group 2 Identifying ‘Bad’ Network Coverage Area Ashutosh Sharma (ID: ) Hamit Taylan YÜCE( ID: ) Resti Montoya Moreno(ID: )

Outline of Presentation Introduction Tools & Software used Scenario description Interpretation of results Possible problem Suggested solutions Conclusions

Introduction Detect possible problems Propose some solutions Identification of poor coverage region Have parameter(s) for identifying poor network area ToolArea ProblemSolution

Tools used :

Software available Antennas RF Signal Tracker Signal check pro Network Signal Info Pro Network signal strength Advanced Signal Tracker

Software(s) used: App for impromptu handheld drive test with Android phone Monitors RF signal strength, records and analysis data.

Scenario description Otakaari 5 Otakaari 1 Location chosen

Scenario description

Photos of the Scenario

Results(dBm)

Possible problems

Solution for the future  Coordinated multipoint transmission/reception CoMP  One of the most important technical improvements of LTE- advanced Rel.11  Minimize inter-cell interference for cells that are operating on the same frequency  CoMP categories  Joint processing: coordination between multiple TX/RX entities that are simultaneously transmitting or receiving  Coordinated scheduling or beamforming: single TX/RX point operates at the time

SOLUTION PROPOSALS Femto Cell PicoCe ll

Cid:11643 BS B Cid:12739 BS C Cid:47714 BS A Location of Scenario

FemtoCell Small, low-power base station Plug and Play Transmit data over Internet Cheap Interference Supports up to 10 m Limited space

Cid:12739 BS C Up to last floor of the building, this base station provides signal But what about ground floor? No signal received Approximately -83dBm INDOOR PROBLEM Behind the Building

-110dBm INDOOR PROBLEM -111dBm cid:11643 BS B -93dBm cid:12739 BS C -101dBm -83dBm Handover

PicoCell Small, low-power base station Mounted on the wall Transmit data over Internet Expensive than FemtoCell Interference Supports up to 100 m

-97 dBm -91dBm -105dBm -107dBm PicoCell OUTDOO R PROBLE M cid:12739 Base Station C Can’t transmit cid: Base Station B -93dBm cid:47714 BS A

Conclusion Due to high walls, signal cannot propagate into the area between buildings Decrease in received signal power should trigger handover decision Walls block base station C to transmit signal inside the building In order to increase capacity and coverage For indoor, femtocells can be deployed For outdoor, picocells can be deployed