Below is a measurement on my "most distant" BTS, BTS 1. From what I see,
downlink is 35 dB
below uplink, which of course is natural when the MS can produce 30 dBm,
and the BTS which
in this case uses a bareback Limesdr min, can only produce 10 dBm.
the bsc parameter ms max power is set to 15 for both bts 0 and bts 1.
However, it seems MS output power is *much* stronger.
Further, my understanding is that it is the BTS level measurements that
decides when to handover,
i.e. measurements in the upstream, and not the MS receive levels...
Since there is such a mismatch between the micro BTS and the MS, maybe
the RX should be attenuated,
to bring upsteram levels more equal to downstream.
OsmoBSC# show conns
Active subscriber connections:
conn ID=6, MSC=0, hodec2_fail=0, mgw_ep=rtpbridge/1@mgw
BTS 0, TRX 0, Timeslot 1, Lchan 0: Type TCH_F
Connection: 1, State: ESTABLISHED
BS Power: 20 dBm, MS Power: 16 dBm
Channel Mode / Codec: SPEECH_V1
No Subscriber
Bound IP: 127.0.0.1 Port 16390 RTP_TYPE2=0 CONN_ID=0
Conn. IP: 192.168.1.70 Port 4186 RTP_TYPE=3 SPEECH_MODE=0x00
Measurement Report:
Flags:
MS Timing Offset: 0
L1 MS Power: 16 dBm, Timing Advance: 0
RXL-FULL-dl: -110 dBm, RXL-SUB-dl: -110 dBm RXQ-FULL-dl: 5,
RXQ-SUB-dl: 5
RXL-FULL-ul: -74 dBm, RXL-SUB-ul: -73 dBm RXQ-FULL-ul: 3,
RXQ-SUB-ul: 1
What are *your* experiences with "power control" and with "handover".
Best Regards,
Gullik
