diff options
| author | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2021-07-01 02:00:14 +0200 |
|---|---|---|
| committer | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2021-07-01 02:01:22 +0200 |
| commit | 30aea88c2cc09b8da4252ba7882c01eff0282790 (patch) | |
| tree | e5c9c33a2d36249663b2d88b3609013adb310c79 | |
| parent | 0e8d68437af4a99dc99d11d4e1f441246bd3ec00 (diff) | |
power_control: constrain BS power reduction on BCCH carrier
BS Power Control is not allowed on the BCCH/CCCH carrier, unless
the BTS is operating in the BCCH carrier power reduction mode.
Allow constrained BS power reduction (up to 6 dB) on active logical
channels iff BCCH carrier power reduction mode is enabled.
Change-Id: I3299b6cdd230d3767321c3d6c64d468b7f5e1d02
Related: SYS#4919, SYS#4918
| -rw-r--r-- | src/common/rsl.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/src/common/rsl.c b/src/common/rsl.c index 5407904b..010b9d3a 100644 --- a/src/common/rsl.c +++ b/src/common/rsl.c @@ -1586,8 +1586,16 @@ static int rsl_rx_chan_activ(struct msgb *msg) return rsl_tx_chan_act_nack(lchan, RSL_ERR_SERV_OPT_UNIMPL); } - lchan->bs_power_ctrl.max = BS_POWER2DB(*TLVP_VAL(&tp, RSL_IE_BS_POWER)); - lchan->bs_power_ctrl.current = lchan->bs_power_ctrl.max; + uint8_t red = BS_POWER2DB(*TLVP_VAL(&tp, RSL_IE_BS_POWER)); + + /* BS power reduction is generally not allowed on BCCH/CCCH carrier. + * However, we allow it in the BCCH carrier power reduction operation. + * Constrain BS power value by the maximum reduction for this timeslot. */ + if (ts->trx->bts->c0 == ts->trx) + red = OSMO_MIN(red, ts->c0_power_red_db); + + lchan->bs_power_ctrl.max = red; + lchan->bs_power_ctrl.current = red; LOGPLCHAN(lchan, DRSL, LOGL_DEBUG, "BS Power attenuation %u dB\n", lchan->bs_power_ctrl.current); @@ -2210,6 +2218,12 @@ static int rsl_rx_bs_pwr_ctrl(struct msgb *msg) return 0; } + /* BS power reduction is generally not allowed on BCCH/CCCH carrier. + * However, we allow it in the BCCH carrier power reduction operation. + * Constrain BS power value by the maximum reduction for this timeslot. */ + if (trx->bts->c0 == trx) + new = OSMO_MIN(new, lchan->ts->c0_power_red_db); + /* 9.3.32 (TLV) BS Power Parameters IE (vendor specific) */ if ((ie = TLVP_GET(&tp, RSL_IE_BS_POWER_PARAM)) != NULL) { struct gsm_power_ctrl_params *params = &lchan->bs_dpc_params; |