diff options
Diffstat (limited to 'src/bts.cpp')
| -rw-r--r-- | src/bts.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/bts.cpp b/src/bts.cpp index 8bb0f26e..9fd4fc3e 100644 --- a/src/bts.cpp +++ b/src/bts.cpp @@ -331,6 +331,44 @@ int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) return 0; } +/* depending on the current TBF, we assign on PACCH or AGCH */ +void BTS::trigger_dl_ass( + struct gprs_rlcmac_tbf *tbf, + struct gprs_rlcmac_tbf *old_tbf, const char *imsi) +{ + /* stop pending timer */ + tbf->stop_timer(); + + /* check for downlink tbf: */ + if (old_tbf) { + LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment on " + "PACCH, because %s TBF=%d exists for TLLI=0x%08x\n", + (old_tbf->direction == GPRS_RLCMAC_UL_TBF) + ? "UL" : "DL", old_tbf->tfi, old_tbf->tlli); + old_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; + /* use TA from old TBF */ + tbf->ta = old_tbf->ta; + /* change state */ + tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); + tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); + /* start timer */ + tbf_timer_start(tbf, 0, Tassign_pacch); + } else { + LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment for TBF=%d on PCH, no TBF exist (IMSI=%s)\n", tbf->tfi, imsi); + if (!imsi || strlen(imsi) < 3) { + LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI!\n"); + return; + } + /* change state */ + tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); + tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); + strncpy(tbf->dir.dl.imsi, imsi, sizeof(tbf->dir.dl.imsi)); + /* send immediate assignment */ + tbf->bts->snd_dl_ass(tbf, 0, imsi); + tbf->dir.dl.wait_confirm = 1; + } +} + void BTS::snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi) { int plen; |