From 854e526de205de1493770b91c27e4d00a65a6173 Mon Sep 17 00:00:00 2001 From: Andreas Eversberg Date: Wed, 11 Dec 2013 16:25:33 +0100 Subject: [WIP] HO: Transmit access bursts on DCCH of TCH channels Change-Id: I1a972d9bac5749c67c1b139825400854f7cf1490 --- src/target/firmware/layer1/prim_rach.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/src/target/firmware/layer1/prim_rach.c b/src/target/firmware/layer1/prim_rach.c index eeb0435f..d7f7c148 100644 --- a/src/target/firmware/layer1/prim_rach.c +++ b/src/target/firmware/layer1/prim_rach.c @@ -131,7 +131,7 @@ static uint8_t rach_to_t3_comb[27] = { 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 45, 46}; -/* request a RACH request at the next multiframe T3 = fn51 */ +/* schedule access burst */ void l1a_rach_req(uint16_t offset, uint8_t combined, uint8_t ra) { uint32_t fn_sched; @@ -144,7 +144,19 @@ void l1a_rach_req(uint16_t offset, uint8_t combined, uint8_t ra) } local_firq_save(flags); - if (combined) { + if (l1s.dedicated.type == GSM_DCHAN_TCH_F) { + fn_sched = l1s.current_time.fn + offset; + /* go next DCCH frame TCH/F channel */ + if ((fn_sched % 13) == 12) + fn_sched++; + } else if (l1s.dedicated.type == GSM_DCHAN_TCH_H) { + fn_sched = l1s.current_time.fn + offset; + /* go next DCCH frame of TCH/H channel */ + if ((fn_sched % 13) == 12) + fn_sched++; + if ((l1s.dedicated.chan_nr & 1) != ((fn_sched % 13) & 1)) + fn_sched++; + } else if (combined) { /* add elapsed RACH slots to offset */ offset += t3_to_rach_comb[l1s.current_time.t3]; /* offset is the number of RACH slots in the future */ @@ -154,6 +166,7 @@ void l1a_rach_req(uint16_t offset, uint8_t combined, uint8_t ra) } else fn_sched = l1s.current_time.fn + offset; l1s.rach.ra = ra; + fn_sched %= 2715648; sched_gsmtime(rach_sched_set_ul, fn_sched, 0); local_irq_restore(flags); -- cgit v1.2.3