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| author | Ivan Kluchnikov <kluchnikovi@gmail.com> | 2013-06-18 21:55:22 +0400 |
|---|---|---|
| committer | Ivan Kluchnikov <kluchnikovi@gmail.com> | 2013-06-18 21:55:22 +0400 |
| commit | 07cd260d9d9a6da0b3856c87852ee8039640d745 (patch) | |
| tree | 3fb6057cb9fbe229fc040f10abb4725c46e8bf6c /src/gprs_bssgp_pcu.cpp | |
| parent | a004e6a8233695abd417a97d6f81a802b605038a (diff) | |
Implemented estimated C/I algorithm for link adaptation.link_adaptation
Description of algorithm:
1. Start with initial coding scheme.
2. Transmit RLC blocks until the end of the reporting window (Packet Downlink Ack/Nack message is received)
3. Estimate the average C/I for the previous reporting window and change CS, if it is necessary.
4. If there is more data to transmit return to step 2.
Added configuration options to enable/disable link adaptation and setting maximum C/I level for CS1, CS2, CS3, CS4.
Diffstat (limited to 'src/gprs_bssgp_pcu.cpp')
| -rw-r--r-- | src/gprs_bssgp_pcu.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/gprs_bssgp_pcu.cpp b/src/gprs_bssgp_pcu.cpp index 54753b85..7c5fba52 100644 --- a/src/gprs_bssgp_pcu.cpp +++ b/src/gprs_bssgp_pcu.cpp @@ -241,6 +241,19 @@ int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp) return -EBUSY; } tbf->tlli = tlli; + struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; + if (bts->cs_link_adaptation) { + /* set coding scheme */ + int cs = recall_cs(tlli); + if (cs > 0) { + tbf->cs = cs; + LOGP(DCS, LOGL_NOTICE, "New DL TBF for tlli = 0x%08x recall CS = %d\n", tbf->tlli, tbf->cs); + } else { + tbf->cs = bts->initial_cs_dl; + remember_cs(tbf->tlli, tbf->cs); + LOGP(DCS, LOGL_NOTICE, "New DL TBF for tlli = 0x%08x remember CS = %d\n", tbf->tlli, tbf->cs); + } + } tbf->tlli_valid = 1; tbf->ta = ta; |