diff options
Diffstat (limited to 'doc/manuals/abis/rtp-amr.adoc')
| -rw-r--r-- | doc/manuals/abis/rtp-amr.adoc | 89 |
1 files changed, 85 insertions, 4 deletions
diff --git a/doc/manuals/abis/rtp-amr.adoc b/doc/manuals/abis/rtp-amr.adoc index 12b5a9fd..6716800b 100644 --- a/doc/manuals/abis/rtp-amr.adoc +++ b/doc/manuals/abis/rtp-amr.adoc @@ -495,10 +495,91 @@ msc { } ---- -DLOS1:: The SID_ONSET and the first voice frame are sent in the same -block of four radio busts. Hence, the BTS must be able ot to send -actual codec payload along with the GsmL1_TchPlType_Amr_Onset -primitive. +==== TCH/AFS Downlink: Inhibiting a SID_FIRST frame + +Here is the procedure to inhibit a SID_FIRST 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="Inhibiting a SID_FIRST frame"]; + + bts <= mgw [label="RTP (AMR FT=SID,Q=1)"]; + phy => bts [label="PH-RTS.ind (TCH)"]; + phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr (SID_FIRST)"]; + bts => bts [label="Store SID frame in case it contains comfort noise parameters"]; + ms <= phy [label="L1 burst (sub-block 5 of speech frame N-1 + sub-block 1 of SID_FIRST)"]; + ms <= phy [label="L1 burst (sub-block 6 of speech frame N-1 + sub-block 2 of SID_FIRST)"]; + ms <= phy [label="L1 burst (sub-block 7 of speech frame N-1 + sub-block 3 of SID_FIRST)"]; + ms <= phy [label="L1 burst (sub-block 8 of speech frame N-1 + sub-block 4 of SID_FIRST)"]; + + bts <= mgw [label="RTP (AMR FT=0..7,Q=1) MARKER=1"]; + phy => bts [label="PH-RTS.ind (TCH)"]; + phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr_Onset"]; + phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr (N)"]; + ms <= phy [label="L1 burst (block 1 of SID_ONSET + sub-block 1 of speech frame N)"]; + 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)"]; + + bts <= mgw [label="RTP (AMR FT=0..7,Q=1)"]; + phy => bts [label="PH-RTS.ind (TCH)"]; + phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr (N+1)"]; + 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 2 of speech frame N+1)"]; + ms <= phy [label="L1 burst (sub-block 8 of speech frame N + sub-block 2 of speech frame N+1)"]; + } +---- + +==== TCH/AFS Downlink: FACCH/F During DTX Operation + +The following procedure must be observed if a FACCH/F frame must be transmitted during DTX operation. + +["mscgen"] +---- +msc { + hscale = 2; + ms [label="MS"], phy [label="BTS-PHY"], bts [label="BTS"], mgw [label="MGW"]; + + ...; + --- [label="FACCH/F Frame During DTX"]; + + bts <= mgw [label="FACCH/F"]; + phy => bts [label="PH-RTS.ind (FACCH/F)"]; + phy => bts [label="PH-RTS.ind (TCH/F)"]; + phy <= bts [label="PH-DATA.req (FACCH/F)"]; + phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr_Onset(TCH/F)", id="NOTE"]; + ms <= phy [label="L1 burst (block 1 of SID_ONSET + sub-block 1 of FACCH/F)"]; + ms <= phy [label="L1 burst (block 2 of SID_ONSET + sub-block 2 of FACCH/F)"]; + ms <= phy [label="L1 burst (block 3 of SID_ONSET + sub-block 3 of FACCH/F)"]; + ms <= phy [label="L1 burst (block 4 of SID_ONSET + sub-block 4 of FACCH/F)"]; + + phy => bts [label="PH-RTS.ind (FACCH)"]; + phy => bts [label="PH-RTS.ind (TCH)"]; + phy <= bts [label="PH-EMPTY-FRAME.req (FACCH/F)"]; + phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr (SID_FIRST)"]; + ms x- phy [label="L1 burst (sub-block 5 of FACCH/F + sub-block 1 of SID_FIRST)"]; + ms x- phy [label="L1 burst (sub-block 6 of FACCH/F + sub-block 2 of SID_FIRST)"]; + ms x- phy [label="L1 burst (sub-block 7 of FACCH/F + sub-block 3 of SID_FIRST)"]; + ms x- phy [label="L1 burst (sub-block 8 of FACCH/F + sub-block 4 of SID_FIRST)"]; + + phy => bts [label="PH-RTS.ind (FACCH)"]; + phy => bts [label="PH-RTS.ind (TCH)"]; + phy <= bts [label="PH-EMPTY-FRAME.req (FACCH/F)"]; + phy <= bts [label="PH-EMPTY-FRAME.req (TCH/F)"]; + ms x- phy [label="Supressed burst"]; + ms x- phy [label="Supressed burst"]; + ms x- phy [label="Supressed burst"]; + ms x- phy [label="Supressed burst"]; +} +---- + +NOTE:: The ONSET and the FACCH/F PH-DATA requests must both be sent to the PHY. == Half-Rate (TCH/AHS) |