Evaluate COST 231 WI for handover

Evaluate COST 231 WI for handover

Course	UNIK4700
Title	Evaluate COST 231 WI for handover
Lecture date	2013/12/06 0900-1200
presented	by Josef Noll
Objective	having implemented COST 231 WI for the realistic environment in Bergen, we'll discuss handover issues might touch into indoor propagation
Learning outcomes
Pensum (read before)
References (further info)
Keywords

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Lecture Notes

• Media:UNIK4700-l10-h13.pdf

Experiences

• current implementation did not convert base station transmit power $P_{Tx}=25W$ into dB, leading to $P_{Tx}=44d{B}_m$

Signal to Noise ratio (SNR)

• SNR, calculated from $SNR=E_b/N_0\cdot f_b/B$ resulted in -7dB, due to coding gain. Assumed
  • $E_b/N_0=5dB$
  • Signal $f_b=12.2kbit/s$ for voice, and $f_b=100kbit/s$ for data in GSM resp. GPRS
• assumed that GSM needs SNR of 7 dB

UMTS receiver sensitivity

• specs require $P_{sens}=-117d{B}_m$ for $BER=10^{-3}$

Notes

UMTS til GSM handover for tale: -104 dBm (normal -100 dBm) UMTS level

UMTS data is stable until about -117 dBm, with handover at -115 dBm

GSM tale handover ...