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Max gerrit-no-reply at lists.osmocom.orgHello Harald Welte, Jenkins Builder, I'd like you to reexamine a change. Please visit https://gerrit.osmocom.org/1186 to look at the new patch set (#2). rtp-amr.adoc: TCH/AFS Uplink Add new chapter by Nutaq for Speech Frame Following a SID_FIRST frame Change-Id: Ib7cfb07525ea311d9dac051a6e139b0ae0549504 --- M OsmoBTS/abis/rtp-amr.adoc 1 file changed, 119 insertions(+), 12 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-manuals refs/changes/86/1186/2 diff --git a/OsmoBTS/abis/rtp-amr.adoc b/OsmoBTS/abis/rtp-amr.adoc index 800545b..12b5a9f 100644 --- a/OsmoBTS/abis/rtp-amr.adoc +++ b/OsmoBTS/abis/rtp-amr.adoc @@ -167,28 +167,135 @@ ...; --- [label="Once voice is active again"]; - ms -x phy [label="Suppressed L1 burst"]; - ms -x phy [label="Suppressed L1 burst"]; - ms -x phy [label="Suppressed L1 burst"]; - ms -x phy [label="Suppressed L1 burst"]; - ms => phy [label="L1 burst (sub-block 5 of SID_ONSET + sub-block 1 of speech frame N)", id="ULSO2"]; - ms => phy [label="L1 burst (sub-block 6 of SID_ONSET + sub-block 2 of speech frame N)"]; - ms => phy [label="L1 burst (sub-block 7 of SID_ONSET + sub-block 3 of speech frame N)"]; - ms => phy [label="L1 burst (sub-block 8 of SID_ONSET + sub-block 4 of speech frame N)"]; - phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr_Onset"]; - bts => bts [label="lchan_set_marker() and store CMI"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + phy -x bts [label="No PH-DATA.ind sent[BFI]"]; + bts -x mgw [label="Suppressed RTP frame"]; + + ms => phy [label="L1 burst (block 1 of SID_ONSET + sub-block 1 of speech frame N)", id="ULSO2"]; + ms => phy [label="L1 burst (block 2 of SID_ONSET + sub-block 2 of speech frame N)"]; + ms => phy [label="L1 burst (block 3 of SID_ONSET + sub-block 3 of speech frame N)"]; + ms => phy [label="L1 burst (block 4 of SID_ONSET + sub-block 4 of speech frame N)"]; + phy -x bts [label="No PH-DATA.ind sent[BFI]"]; + bts -x mgw [label="Suppressed RTP frame"]; + ms => phy [label="L1 burst (sub-block 5 of speech frame N + sub-block 1 of speech frame N+1)"]; ms => phy [label="L1 burst (sub-block 6 of speech frame N + sub-block 2 of speech frame N+1)"]; ms => phy [label="L1 burst (sub-block 7 of speech frame N + sub-block 3 of speech frame N+1)"]; ms => phy [label="L1 burst (sub-block 8 of speech frame N + sub-block 4 of speech frame N+1)"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr_Onset"]; + bts => bts [label="lchan_set_marker() and store CMI"]; phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr (N)"]; - bts => mgw [label="RTP (AMR FT=0..7,Q=1), MARKER=1"]; + bts => mgw [label="RTP (AMR FT=0..7,Q=1) MARKER=1"]; + + ms => phy [label="L1 burst (sub-block 5 of speech frame N+1 + sub-block 1 of speech frame N+2)"]; + ms => phy [label="L1 burst (sub-block 6 of speech frame N+1 + sub-block 2 of speech frame N+2)"]; + ms => phy [label="L1 burst (sub-block 7 of speech frame N+1 + sub-block 3 of speech frame N+2)"]; + ms => phy [label="L1 burst (sub-block 8 of speech frame N+1 + sub-block 4 of speech frame N+2)"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr (N+1)"]; + bts => mgw [label="RTP (AMR FT=0..7,Q=1)"]; ...; } ---- ULSO2:: sub-blocks 1..4 of SID_ONSET are never transmitted as all -infomration is contained in blocks 5..8. +information is contained in blocks 5..8. + +==== TCH/AFS Uplink: Speech Frame Following a SID_FIRST frame + +The four last bursts of a SID_FIRST frame can be replaced by an ONSET frame in order to quickly resume speech. + +["mscgen"] +---- +msc { + hscale = 2; + ms [label="MS"], phy [label="BTS-PHY"], bts [label="BTS"], mgw [label="MGW"]; + + ...; + --- [label="Speech Frame Following a SID_FIRST"]; + + ms => phy [label="L1 burst (sub-block 5 of speech frame N, sub-block 1 of SID_FIRST)"]; + ms => phy [label="L1 burst (sub-block 6 of speech frame N, sub-block 2 of SID_FIRST)"]; + ms => phy [label="L1 burst (sub-block 7 of speech frame N, sub-block 3 of SID_FIRST)"]; + ms => phy [label="L1 burst (sub-block 8 of speech frame N, sub-block 4 of SID_FIRST)"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr (N)"]; + bts => mgw [label="RTP (AMR FT=0..7,Q=1)"]; + + ms => phy [label="L1 burst (block 1 of SID_ONSET + sub-block 1 of speech frame N+1)"]; + ms => phy [label="L1 burst (block 2 of SID_ONSET + sub-block 2 of speech frame N+1)"]; + ms => phy [label="L1 burst (block 3 of SID_ONSET + sub-block 3 of speech frame N+1)"]; + ms => phy [label="L1 burst (block 4 of SID_ONSET + sub-block 4 of speech frame N+1)"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr (SID_FIRST)"]; + bts => mgw [label="RTP (AMR FT=SID,Q=1)"]; + + ms => phy [label="L1 burst (sub-block 5 of speech frame N+1 + sub-block 1 of speech frame N+2)"]; + ms => phy [label="L1 burst (sub-block 6 of speech frame N+1 + sub-block 2 of speech frame N+2)"]; + ms => phy [label="L1 burst (sub-block 7 of speech frame N+1 + sub-block 3 of speech frame N+2)"]; + ms => phy [label="L1 burst (sub-block 8 of speech frame N+1 + sub-block 4 of speech frame N+2)"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr_Onset"]; + bts => bts [label="lchan_set_marker() and store CMI"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr (N+1)"]; + bts => mgw [label="RTP (AMR FT=0..7,Q=1) MARKER=1"]; + ...; +} +---- + +==== TCH/AFS Uplink: FACCH/F Frame During DTX Operation + +As mentioned in section A.5.1.2.1 of 3GPP TS 26.093 : + +* If the frame preceding the FACCH frame is not of TX_TYPE='SPEECH_GOOD', then an ONSET frame shall be signalled to the CHE, followed by the FACCH frame(s). +* If the frame following the FACCH frame is not of TX_TYPE='SPEECH_GOOD', then a SID_FIRST shall be signalled to the CHE. + +["mscgen"] +---- +msc { + hscale = 2; + ms [label="MS"], phy [label="BTS-PHY"], bts [label="BTS"], mgw [label="MGW"]; + + ...; + --- [label="FACCH/F Frame During DTX"]; + + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + phy -x bts [label="No PH-DATA.ind sent[BFI]"]; + bts -x mgw [label="Suppressed RTP frame"]; + + ms => phy [label="L1 burst (block 1 of SID_ONSET + sub-block 1 of FACCH frame)"]; + ms => phy [label="L1 burst (block 2 of SID_ONSET + sub-block 2 of FACCH frame)"]; + ms => phy [label="L1 burst (block 3 of SID_ONSET + sub-block 3 of FACCH frame)"]; + ms => phy [label="L1 burst (block 4 of SID_ONSET + sub-block 4 of FACCH frame)"]; + phy -x bts [label="No PH-DATA.ind sent[BFI]"]; + bts -x mgw [label="Suppressed RTP frame"]; + + ms => phy [label="L1 burst (sub-block 5 of FACCH frame + sub-block 1 of SID First frame)"]; + ms => phy [label="L1 burst (sub-block 6 of FACCH frame + sub-block 2 of SID First frame)"]; + ms => phy [label="L1 burst (sub-block 7 of FACCH frame + sub-block 3 of SID First frame)"]; + ms => phy [label="L1 burst (sub-block 8 of FACCH frame + sub-block 4 of SID First frame)", id="Note"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr_Onset"]; + bts => bts [label="lchan_set_marker() and store CMI"]; + phy => bts [label="PH-DATA.ind FACCH/F"]; + bts => mgw [label="FACCH/F"]; + + ms -x phy [label="Supressed L1 burst", id="ULSF2"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + ms -x phy [label="Supressed L1 burst"]; + phy => bts [label="PH-DATA.ind GsmL1_TchPlType_Amr (SID_FIRST)"]; + bts => mgw [label="RTP (AMR FT=SID,Q=1)"]; + ...; +} +---- + +ULSF2:: The sub-blocks 5-8 of SID_FIRST are not transmitted, as all +information bits are contained in sub-blocks 1-4 only + +Note:: It has been observed with some phones that the SID_FIRST is not sent following the FACCH/F +frame. If this case occures the No Data Frame and SID_UPDATE order resumes. === TCH/AFS Downlink (Network to MS) -- To view, visit https://gerrit.osmocom.org/1186 To unsubscribe, visit https://gerrit.osmocom.org/settings Gerrit-MessageType: newpatchset Gerrit-Change-Id: Ib7cfb07525ea311d9dac051a6e139b0ae0549504 Gerrit-PatchSet: 2 Gerrit-Project: osmo-gsm-manuals Gerrit-Branch: master Gerrit-Owner: Max <msuraev at sysmocom.de> Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org> Gerrit-Reviewer: Jenkins Builder