Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
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osmo-pcu/src/gprs_rlcmac_meas.cpp

194 lines
4.7 KiB

/* Measurements
*
* Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
extern "C" {
#include <osmocom/core/timer_compat.h>
}
#include <gprs_rlcmac.h>
#include <gprs_debug.h>
#include <pcu_l1_if.h>
#include <tbf.h>
#include <tbf_dl.h>
#include <gprs_ms.h>
#include <string.h>
#include <errno.h>
/*
* downlink measurement
*/
/* TODO: trigger the measurement report from the pollcontroller and use it for flow control */
/* received Measurement Report */
int gprs_rlcmac_meas_rep(GprsMs *ms, Packet_Measurement_Report_t *pmr)
{
NC_Measurement_Report_t *ncr;
NC_Measurements_t *nc;
int i;
LOGPMS(ms, DRLCMACMEAS, LOGL_INFO, "Rx Measurement Report:");
switch (pmr->UnionType) {
case 0:
ncr = &pmr->u.NC_Measurement_Report;
LOGPC(DRLCMACMEAS, LOGL_INFO, " NC%u Serv %d dbm",
ncr->NC_MODE + 1,
ncr->Serving_Cell_Data.RXLEV_SERVING_CELL - 110);
for (i = 0; i < ncr->NUMBER_OF_NC_MEASUREMENTS; i++) {
nc = &ncr->NC_Measurements[i];
LOGPC(DRLCMACMEAS, LOGL_DEBUG, ", Neigh %u %d dbm",
nc->FREQUENCY_N, nc->RXLEV_N - 110);
}
LOGPC(DRLCMACMEAS, LOGL_INFO, "\n");
break;
case 1:
LOGPC(DRLCMACMEAS, LOGL_INFO,
" <EXT Reporting not supported!>\n");
break;
}
return 0;
}
/*
* uplink measurement
*/
/* RSSI values received from MS */
int gprs_rlcmac_rssi(struct gprs_rlcmac_tbf *tbf, int8_t rssi)
{
struct timespec now_tv, *rssi_tv = &tbf->meas.rssi_tv;
struct timespec elapsed;
tbf->meas.rssi_sum += rssi;
tbf->meas.rssi_num++;
osmo_clock_gettime(CLOCK_MONOTONIC, &now_tv);
timespecsub(&now_tv, rssi_tv, &elapsed);
if (elapsed.tv_sec < 1)
return 0;
gprs_rlcmac_rssi_rep(tbf);
/* reset rssi values and timestamp */
memcpy(rssi_tv, &now_tv, sizeof(*rssi_tv));
tbf->meas.rssi_sum = 0;
tbf->meas.rssi_num = 0;
return 0;
}
/* Give RSSI report */
int gprs_rlcmac_rssi_rep(struct gprs_rlcmac_tbf *tbf)
{
/* No measurement values */
if (!tbf->meas.rssi_num)
return -EINVAL;
LOGPMS(tbf->ms(), DRLCMACMEAS, LOGL_INFO, "UL RSSI: %d dBm\n",
tbf->meas.rssi_sum / tbf->meas.rssi_num);
return 0;
}
/*
* lost frames
*/
/* Lost frames reported from RLCMAC layer */
int gprs_rlcmac_received_lost(struct gprs_rlcmac_dl_tbf *tbf, uint16_t received,
uint16_t lost)
{
struct timespec now_tv, *loss_tv = &tbf->m_bw.dl_loss_tv;
struct timespec elapsed;
uint16_t sum = received + lost;
/* No measurement values */
if (!sum)
return -EINVAL;
LOGP(DRLCMACMEAS, LOGL_DEBUG, "DL Loss of TLLI 0x%08x: Received: %4d "
"Lost: %4d Sum: %4d\n", tbf->tlli(), received, lost, sum);
tbf->m_bw.dl_loss_received += received;
tbf->m_bw.dl_loss_lost += lost;
osmo_clock_gettime(CLOCK_MONOTONIC, &now_tv);
timespecsub(&now_tv, loss_tv, &elapsed);
if (elapsed.tv_sec < 1)
return 0;
gprs_rlcmac_lost_rep(tbf);
/* reset lost values and timestamp */
memcpy(loss_tv, &now_tv, sizeof(*loss_tv));
tbf->m_bw.dl_loss_received = 0;
tbf->m_bw.dl_loss_lost = 0;
return 0;
}
/* Give Lost report */
int gprs_rlcmac_lost_rep(struct gprs_rlcmac_dl_tbf *tbf)
{
uint16_t sum = tbf->m_bw.dl_loss_lost + tbf->m_bw.dl_loss_received;
/* No measurement values */
if (!sum)
return -EINVAL;
LOGP(DRLCMACMEAS, LOGL_DEBUG, "DL packet loss of IMSI=%s / TLLI=0x%08x: "
"%d%%\n", tbf->imsi(), tbf->tlli(),
tbf->m_bw.dl_loss_lost * 100 / sum);
return 0;
}
/*
* downlink bandwidth
*/
int gprs_rlcmac_dl_bw(struct gprs_rlcmac_dl_tbf *tbf, uint16_t octets)
{
struct timespec now_tv, *bw_tv = &tbf->m_bw.dl_bw_tv;
struct timespec elapsed;
tbf->m_bw.dl_bw_octets += octets;
osmo_clock_gettime(CLOCK_MONOTONIC, &now_tv);
timespecsub(&now_tv, bw_tv, &elapsed);
if (elapsed.tv_sec < 1)
return 0;
tbf->m_bw.dl_throughput = (tbf->m_bw.dl_bw_octets << 10) / ((elapsed.tv_sec << 10) + (elapsed.tv_nsec >> 20));
LOGP(DRLCMACMEAS, LOGL_INFO, "DL Bandwitdh of IMSI=%s / TLLI=0x%08x: "
"%d KBits/s\n", tbf->imsi(), tbf->tlli(), tbf->m_bw.dl_throughput);
/* reset bandwidth values timestamp */
memcpy(bw_tv, &now_tv, sizeof(*bw_tv));
tbf->m_bw.dl_bw_octets = 0;
return 0;
}