diff options
| author | Max <msuraev@sysmocom.de> | 2016-05-11 17:33:17 +0200 |
|---|---|---|
| committer | Holger Freyther <holger@freyther.de> | 2016-05-17 16:10:31 +0000 |
| commit | 764b022fc69c4bb9816e12801186f8fa25f8dd72 (patch) | |
| tree | adf301660c4fbedc31c820815d763949957fb47f /src/gsm/gsm_utils.c | |
| parent | fe65fa7e36a400d362666e2c5bd0f289d45aa56a (diff) | |
Add function to make Uplink Measurement
It assembles RSL Uplink Measurement IE according to 3GPP TS 08.58
§9.3.25. The function is based on lchan_build_rsl_ul_meas() from OsmoBTS
but optionally includes DTX information.
Change-Id: Ib37107bcc9909e5105ea711de42d3fb1db7e8d9e
Reviewed-on: https://gerrit.osmocom.org/44
Tested-by: Jenkins Builder
Reviewed-by: Harald Welte <laforge@gnumonks.org>
Diffstat (limited to 'src/gsm/gsm_utils.c')
| -rw-r--r-- | src/gsm/gsm_utils.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/gsm/gsm_utils.c b/src/gsm/gsm_utils.c index 50029479..7365ab7c 100644 --- a/src/gsm/gsm_utils.c +++ b/src/gsm/gsm_utils.c @@ -66,11 +66,13 @@ #include <osmocom/core/utils.h> #include <osmocom/core/bitvec.h> #include <osmocom/gsm/gsm_utils.h> +#include <osmocom/gsm/meas_rep.h> #include <osmocom/gsm/protocol/gsm_04_08.h> #include <stdlib.h> #include <stdint.h> #include <string.h> +#include <stdbool.h> #include <stdio.h> #include <errno.h> #include <ctype.h> @@ -335,6 +337,24 @@ int gsm_7bit_encode_n_ussd(uint8_t *result, size_t n, const char *data, int *oct return y; } +/*! \brief Build the RSL uplink measurement IE (3GPP TS 08.58 § 9.3.25) + * \param[in] mru Unidirectional measurement report structure + * \param[in] dtxd_used Indicates if DTXd was used during measurement report + * period + * \param[out] buf Pre-allocated bufer for storing IE + * \returns Number of bytes filled in buf + */ +size_t gsm0858_rsl_ul_meas_enc(struct gsm_meas_rep_unidir *mru, bool dtxd_used, + uint8_t *buf) +{ + buf[0] = dtxd_used ? (1 << 6) : 0; + buf[0] |= (mru->full.rx_lev & 0x3f); + buf[1] = (mru->sub.rx_lev & 0x3f); + buf[2] = ((mru->full.rx_qual & 7) << 3) | (mru->sub.rx_qual & 7); + + return 3; +} + /* convert power class to dBm according to GSM TS 05.05 */ unsigned int ms_class_gmsk_dbm(enum gsm_band band, int class) { |