From patchwork Fri May 20 16:26:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [MERGED] openbsc[master]: Use proper measurement for handover From: Holger Freyther X-Patchwork-Id: 70691 Message-Id: <20160520162634.A73016CFE@lists.osmocom.org> To: Max Date: Fri, 20 May 2016 16:26:33 +0000 Holger Freyther has submitted this change and it was merged. Change subject: Use proper measurement for handover ...................................................................... Use proper measurement for handover Previously *FULL measurements were always used for handover decisions. Those are incorrect in case of DTX - check if it was enabled and use *SUB instead. Note: *SUB values have higher variance so there might be more "bad" values compared to *FULL although real quality remains the same. Change-Id: I95e8e544047a83a256e057a47458678f40a19a15 Related: OS#1701 Reviewed-on: https://gerrit.osmocom.org/66 Tested-by: Jenkins Builder Reviewed-by: Harald Welte --- M openbsc/src/libbsc/handover_decision.c 1 file changed, 12 insertions(+), 5 deletions(-) Approvals: Harald Welte: Looks good to me, approved Jenkins Builder: Verified diff --git a/openbsc/src/libbsc/handover_decision.c b/openbsc/src/libbsc/handover_decision.c index 24c0f79..0f07bca 100644 --- a/openbsc/src/libbsc/handover_decision.c +++ b/openbsc/src/libbsc/handover_decision.c @@ -228,6 +228,7 @@ static int process_meas_rep(struct gsm_meas_rep *mr) { struct gsm_network *net = mr->lchan->ts->trx->bts->network; + enum meas_rep_field dlev, dqual; int av_rxlev; /* we currently only do handover for TCH channels */ @@ -239,22 +240,28 @@ return 0; } + if (mr->flags & MEAS_REP_F_DL_DTX) { + dlev = MEAS_REP_DL_RXLEV_SUB; + dqual = MEAS_REP_DL_RXQUAL_SUB; + } else { + dlev = MEAS_REP_DL_RXLEV_FULL; + dqual = MEAS_REP_DL_RXQUAL_FULL; + } + /* parse actual neighbor cell info */ if (mr->num_cell > 0 && mr->num_cell < 7) process_meas_neigh(mr); - av_rxlev = get_meas_rep_avg(mr->lchan, MEAS_REP_DL_RXLEV_FULL, + av_rxlev = get_meas_rep_avg(mr->lchan, dlev, net->handover.win_rxlev_avg); /* Interference HO */ if (rxlev2dbm(av_rxlev) > -85 && - meas_rep_n_out_of_m_be(mr->lchan, MEAS_REP_DL_RXQUAL_FULL, - 3, 4, 5)) + meas_rep_n_out_of_m_be(mr->lchan, dqual, 3, 4, 5)) return attempt_handover(mr); /* Bad Quality */ - if (meas_rep_n_out_of_m_be(mr->lchan, MEAS_REP_DL_RXQUAL_FULL, - 3, 4, 5)) + if (meas_rep_n_out_of_m_be(mr->lchan, dqual, 3, 4, 5)) return attempt_handover(mr); /* Low Level */