diff options
| -rw-r--r-- | src/osmo-bts-trx/sched_lchan_tchf.c | 39 | ||||
| -rw-r--r-- | src/osmo-bts-trx/sched_lchan_tchh.c | 25 |
2 files changed, 44 insertions, 20 deletions
diff --git a/src/osmo-bts-trx/sched_lchan_tchf.c b/src/osmo-bts-trx/sched_lchan_tchf.c index c0dfd47a..0138a2a2 100644 --- a/src/osmo-bts-trx/sched_lchan_tchf.c +++ b/src/osmo-bts-trx/sched_lchan_tchf.c @@ -535,16 +535,25 @@ int tx_tchf_fn(struct l1sched_ts *l1ts, struct trx_dl_burst_req *br) int rc; LOGL1SB(DL1P, LOGL_DEBUG, l1ts, br, "No TCH or FACCH prim for transmit.\n"); - /* If the channel mode is TCH/FS or TCH/EFS, transmit a dummy - * speech block with inverted CRC3, designed to induce a BFI - * condition in the MS receiver. In all other channel modes, - * transmit dummy FACCH like we always did before. + /* - If the channel mode is TCH/FS or TCH/EFS, transmit a dummy + * speech block with inverted CRC3, designed to induce a BFI + * condition in the MS receiver. + * - If the channel mode is one of the CSD modes, transmit an + * idle frame as described in 3GPP TS 44.021, sections 8.1.6 + * and 10.2.3 (all data, status and E-bits set to binary '1'). + * - In all other channel modes, transmit dummy FACCH + * like we always did before. * * FIXME: someone who knows AMR needs to look at this problem * and decide what is the correct BTS Tx behavior for frame * gaps in TCH/AFS. See OS#6049. */ switch (tch_mode) { + case GSM48_CMODE_DATA_12k0: + case GSM48_CMODE_DATA_6k0: + case GSM48_CMODE_DATA_3k6: + case GSM48_CMODE_DATA_14k5: + break; /* see below */ case GSM48_CMODE_SPEECH_V1: case GSM48_CMODE_SPEECH_EFR: rc = gsm0503_tch_fr_encode(BUFPOS(bursts_p, 0), NULL, 0, 1); @@ -591,30 +600,36 @@ int tx_tchf_fn(struct l1sched_ts *l1ts, struct trx_dl_burst_req *br) break; /* CSD (TCH/F9.6): 12.0 kbit/s radio interface rate */ case GSM48_CMODE_DATA_12k0: - if (msg_tch != NULL) - gsm0503_tch_fr96_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); + if (msg_tch == NULL) + msg_tch = tch_dummy_msgb(4 * 60, 0x01); + gsm0503_tch_fr96_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); if (msg_facch != NULL) gsm0503_tch_fr_facch_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_facch)); break; /* CSD (TCH/F4.8): 6.0 kbit/s radio interface rate */ case GSM48_CMODE_DATA_6k0: - if (msg_tch != NULL) - gsm0503_tch_fr48_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); + if (msg_tch == NULL) + msg_tch = tch_dummy_msgb(2 * 60, 0x01); + gsm0503_tch_fr48_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); if (msg_facch != NULL) gsm0503_tch_fr_facch_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_facch)); break; /* CSD (TCH/F2.4): 3.6 kbit/s radio interface rate */ case GSM48_CMODE_DATA_3k6: /* FACCH/F does steal a TCH/F2.4 frame completely */ - if (msg == msg_facch) + if (msg_facch != NULL) { gsm0503_tch_fr_facch_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_facch)); - else + } else { + if (msg_tch == NULL) + msg_tch = tch_dummy_msgb(2 * 36, 0x01); gsm0503_tch_fr24_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); + } break; /* CSD (TCH/F14.4): 14.5 kbit/s radio interface rate */ case GSM48_CMODE_DATA_14k5: - if (msg_tch != NULL) - gsm0503_tch_fr144_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); + if (msg_tch == NULL) + msg_tch = tch_dummy_msgb(290, 0x01); + gsm0503_tch_fr144_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); if (msg_facch != NULL) gsm0503_tch_fr_facch_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_facch)); break; diff --git a/src/osmo-bts-trx/sched_lchan_tchh.c b/src/osmo-bts-trx/sched_lchan_tchh.c index 96ee5e8c..e0d7aca6 100644 --- a/src/osmo-bts-trx/sched_lchan_tchh.c +++ b/src/osmo-bts-trx/sched_lchan_tchh.c @@ -450,16 +450,23 @@ int tx_tchh_fn(struct l1sched_ts *l1ts, struct trx_dl_burst_req *br) int rc; LOGL1SB(DL1P, LOGL_INFO, l1ts, br, "No TCH or FACCH prim for transmit.\n"); - /* If the channel mode is TCH/HS, transmit a dummy speech block - * with inverted CRC3, designed to induce a BFI condition in - * the MS receiver. In all other channel modes, transmit - * dummy FACCH like we always did before. + /* - If the channel mode is TCH/HS, transmit a dummy speech block + * with inverted CRC3, designed to induce a BFI condition in + * the MS receiver. + * - If the channel mode is one of the CSD modes, transmit an + * idle frame as described in 3GPP TS 44.021, sections 8.1.6 + * and 10.2.3 (all data, status and E-bits set to binary '1'). + * - In all other channel modes, transmit dummy FACCH + * like we always did before. * * FIXME: someone who knows AMR needs to look at this problem * and decide what is the correct BTS Tx behavior for frame * gaps in TCH/AHS. See OS#6049. */ switch (tch_mode) { + case GSM48_CMODE_DATA_6k0: + case GSM48_CMODE_DATA_3k6: + break; /* see below */ case GSM48_CMODE_SPEECH_V1: rc = gsm0503_tch_hr_encode(BUFPOS(bursts_p, 0), NULL, 0); if (rc == 0) @@ -515,15 +522,17 @@ int tx_tchh_fn(struct l1sched_ts *l1ts, struct trx_dl_burst_req *br) break; /* CSD (TCH/H4.8): 6.0 kbit/s radio interface rate */ case GSM48_CMODE_DATA_6k0: - if (msg_tch != NULL) - gsm0503_tch_hr48_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); + if (msg_tch == NULL) + msg_tch = tch_dummy_msgb(4 * 60, 0x01); + gsm0503_tch_hr48_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); if (msg_facch != NULL) gsm0503_tch_hr_facch_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_facch)); break; /* CSD (TCH/H2.4): 3.6 kbit/s radio interface rate */ case GSM48_CMODE_DATA_3k6: - if (msg_tch != NULL) - gsm0503_tch_hr24_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); + if (msg_tch == NULL) + msg_tch = tch_dummy_msgb(4 * 36, 0x01); + gsm0503_tch_hr24_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_tch)); if (msg_facch != NULL) gsm0503_tch_hr_facch_encode(BUFPOS(bursts_p, 0), msgb_l2(msg_facch)); break; |