cellular-infrastructure
/
osmo-bts
mirror of https://gerrit.osmocom.org/osmo-bts
9
0
Fork 0
Code Issues Releases Wiki Activity

rsl: Implement parsing of BS Power Control message 

Change-Id: Id144a7e468f730e3cdaefa4cf2ad51c6106310a2
This commit is contained in:
Harald Welte 2019-05-23 20:15:29 +02:00
parent bf5d8eed11
commit 839b0f264f
2 changed files with 45 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
doc/manuals/abis/rsl.adoc
View File

@ -39,6 +39,7 @@ Specific additions and limitations apply, see the linked sections.
| 8.4.11 | - | MODE MODIFY NEGATIVE ACKNOWLEDGE | -> | Sent
| 8.4.14 | - | RF CHANNEL RELEASE | <- | Received
| 8.4.15 | <<MS_POWER_CONTROL>> | MS POWER CONTROL | <- | Received
| 8.4.16 | - | BS POWER CONTROL | <- | Received
| 8.4.19 | - | RF CHANNEL RELEASE ACKNOWLEDGE | -> | Sent
| 8.4.20 | <<SACCH_INFO_MODIFY>> | SACCH INFO MODIFY | <- | Received
5+<| *COMMON CHANNEL MANAGEMENT MESSAGES*
@ -91,7 +92,6 @@ Specific additions and limitations apply, see the linked sections.
2+<| *DEDICATED CHANNEL MANAGEMENT MESSAGES*
| 8.4.12 | PHYSICAL CONTEXT REQUEST
| 8.4.13 | PHYSICAL CONTEXT CONFIRM
| 8.4.16 | BS POWER CONTROL
| 8.4.17 | PREPROCESS CONFIGURE
| 8.4.18 | PREPROCESSED MEASUREMENT RESULT
| 8.4.21 | TALKER DETECTION

44
src/common/rsl.c
View File

@ -1585,6 +1585,47 @@ static int rsl_rx_ms_pwr_ctrl(struct msgb *msg)
return 0;
}
/* See TS 48.058 Section 9.3.4 */
static int bs_power_attenuation_dB(uint8_t bs_power)
{
/* the lower nibble contains the number of 2dB steps that the BS power is reduced compared
* to its nominal transmit power */
return - ((bs_power & 0xF) *2);
}
/* 8.4.16 BS POWER CONTROL */
static int rsl_rx_bs_pwr_ctrl(struct msgb *msg)
{
struct abis_rsl_dchan_hdr *dch = msgb_l2(msg);
struct gsm_lchan *lchan = msg->lchan;
struct tlv_parsed tp;
uint8_t new_bs_power;
rsl_tlv_parse(&tp, msgb_l3(msg), msgb_l3len(msg));
/* 9.3.4 BS Power (M) */
if (!TLVP_PRES_LEN(&tp, RSL_IE_BS_POWER, 1))
return rsl_tx_error_report(msg->trx, RSL_ERR_MAND_IE_ERROR, &dch->chan_nr, NULL, msg);
new_bs_power = *TLVP_VAL(&tp, RSL_IE_BS_POWER);
LOGPLCHAN(lchan, DRSL, LOGL_INFO, "BS POWER CONTROL Attenuation %d -> %d dB\n",
bs_power_attenuation_dB(lchan->bs_power), bs_power_attenuation_dB(new_bs_power));
lchan->bs_power = new_bs_power;
/* 9.3.31 MS Power Parameters (O) */
if (TLVP_PRESENT(&tp, RSL_IE_BS_POWER_PARAM)) {
/* Spec explicitly states BTS should perform autonomous
* BS power control loop in BTS if 'BS Power Parameters'
* IE is present! WE don't support that. */
return rsl_tx_error_report(msg->trx, RSL_ERR_OPT_IE_ERROR, &dch->chan_nr, NULL, msg);
}
return 0;
}
/* 8.4.20 SACCH INFO MODify */
static int rsl_rx_sacch_inf_mod(struct msgb *msg)
{
@ -2926,6 +2967,9 @@ static int rsl_rx_dchan(struct gsm_bts_trx *trx, struct msgb *msg)
case RSL_MT_MS_POWER_CONTROL:
ret = rsl_rx_ms_pwr_ctrl(msg);
break;
case RSL_MT_BS_POWER_CONTROL:
ret = rsl_rx_bs_pwr_ctrl(msg);
break;
case RSL_MT_IPAC_PDCH_ACT:
case RSL_MT_IPAC_PDCH_DEACT:
rsl_rx_dyn_pdch(msg, dch->c.msg_type == RSL_MT_IPAC_PDCH_ACT);