For my previous post in the subject:
show lchan clearly indicates that the logical connections were never
got disconnected. When the above output as made, there were no
activity on the BTS for more than 20 minutes, yet these channels are
not released:
OpenBSC# show lchan
BTS 0, TRX 0, Timeslot 0, Lchan 0: Type SDCCH
Connection: 0, State: RELEASE REQUESTED
BS Power: 22 dBm, MS Power: 26 dBm
No Subscriber
Measurement Report:
Flags: DLinval
RXL-FULL-ul: -110 dBm, RXL-SUB-ul: -110 dBm RXQ-FULL-ul: 0, RXQ-SUB-ul: 0
BTS 0, TRX 0, Timeslot 0, Lchan 1: Type SDCCH
Connection: 0, State: RELEASE REQUESTED
BS Power: 22 dBm, MS Power: 26 dBm
No Subscriber
Measurement Report:
Flags: DLinval
RXL-FULL-ul: -110 dBm, RXL-SUB-ul: -110 dBm RXQ-FULL-ul: 0, RXQ-SUB-ul: 0
BTS 0, TRX 0, Timeslot 0, Lchan 2: Type SDCCH
Connection: 0, State: RELEASE REQUESTED
BS Power: 22 dBm, MS Power: 26 dBm
No Subscriber
Measurement Report:
Flags: DLinval
RXL-FULL-ul: -110 dBm, RXL-SUB-ul: -110 dBm RXQ-FULL-ul: 0, RXQ-SUB-ul: 0
BTS 0, TRX 0, Timeslot 0, Lchan 3: Type SDCCH
Connection: 0, State: RELEASE REQUESTED
BS Power: 22 dBm, MS Power: 26 dBm
No Subscriber
Measurement Report:
Flags:
L1 MS Power: 26 dBm, Timing Advance: 0
RXL-FULL-dl: -47 dBm, RXL-SUB-dl: -47 dBm RXQ-FULL-dl: 0, RXQ-SUB-dl: 0
RXL-FULL-ul: -47 dBm, RXL-SUB-ul: -47 dBm RXQ-FULL-ul: 0, RXQ-SUB-ul: 0
BTS 0, TRX 0, Timeslot 1, Lchan 0: Type SDCCH
Connection: 0, State: RELEASE REQUESTED
BS Power: 22 dBm, MS Power: 26 dBm
No Subscriber
Measurement Report:
Flags: DLinval
RXL-FULL-ul: -110 dBm, RXL-SUB-ul: -110 dBm RXQ-FULL-ul: 0, RXQ-SUB-ul: 0
OpenBSC#
With this method I can fill the whole signalling capacity of the BTS
without any actual call or SMS being sent.
Csaba
