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trx_toolkit/fake_trx.py: introduce a TRXC command for C/I simulation 

C/I (Carrier-to-Interference ratio) is a value in cB (centiBels),
computed from the training sequence of each received burst,
by comparing the "ideal" training sequence with the received one.

This change introduces a new command similar to FAKE_TOA and FAKE_RSSI,
so it can be used by TTCN-3 test case 'TC_pcu_data_ind_lqual_cb' to
verify that the link quality measurements are delivered to the PCU.

Change-Id: I7080effbbc1022d1884c6d6f0cb580eba8e514ff
Related: OS#1855
This commit is contained in:
Vadim Yanitskiy 2019-06-24 14:32:05 +07:00
parent 13ec32d380
commit 3d9a1d6e48
1 changed files with 29 additions and 2 deletions
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31
src/target/trx_toolkit/fake_trx.py
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@ -64,8 +64,16 @@ class FakeTRX(Transceiver):
from (rssi_base - rssi_rand_threshold) from (rssi_base - rssi_rand_threshold)
to (rssi_base + rssi_rand_threshold). to (rssi_base + rssi_rand_threshold).
Please note that randomization of both RSSI and ToA is optional, - C/I (Carrier-to-Interference ratio) - value in cB (centiBels),
and can be enabled from the control interface. computed from the training sequence of each received burst, by
comparing the "ideal" training sequence with the actual one.
A pair of both base and threshold values defines a range of
C/I randomization:
from (ci_base - ci_rand_threshold)
to (ci_base + ci_rand_threshold).
Please note that the randomization is optional and disabled by default.
== Timing Advance handling == Timing Advance handling
@ -263,6 +271,25 @@ class FakeTRX(Transceiver):
self.rssi_base += int(request[1]) self.rssi_base += int(request[1])
return 0 return 0
# C/I simulation
# Absolute form: CMD FAKE_CI <BASE> <THRESH>
elif self.ctrl_if.verify_cmd(request, "FAKE_CI", 2):
log.debug("(%s) Recv FAKE_CI cmd" % self)
# Parse and apply both base and threshold
self.ci_base = int(request[1])
self.ci_rand_threshold = int(request[2])
return 0
# C/I simulation
# Relative form: CMD FAKE_CI <+-BASE_DELTA>
elif self.ctrl_if.verify_cmd(request, "FAKE_CI", 1):
log.debug("(%s) Recv FAKE_CI cmd" % self)
# Parse and apply delta
self.ci_base += int(request[1])
return 0
# Path loss simulation: burst dropping # Path loss simulation: burst dropping
# Syntax: CMD FAKE_DROP <AMOUNT> # Syntax: CMD FAKE_DROP <AMOUNT>
# Dropping pattern: fn % 1 == 0 # Dropping pattern: fn % 1 == 0