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rtp-amr.adoc: New TCH/AHS downlink chapters 

Nutaq contributed the following chapters:
* TCH/AHS Downlink: FACCH/H During DTX Operation
* TCH/AHS Downlink: Inhibited SID_UPDATE
* TCH/AHS Downlink: Inhibited SID_FIRST_P1

Change-Id: I55d8e9f98694b39514d1f31c517a80050103fdd6
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Harald Welte 2016-11-03 14:14:01 +01:00 committed by Max
parent 8d2b6b858f
commit ffd4a22a93
1 changed files with 107 additions and 4 deletions
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OsmoBTS/abis/rtp-amr.adoc
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@ -1087,7 +1087,110 @@ msc {
} }
---- ----
DLOS2:: The SID_ONSET and the first voice frame are sent in the same ==== TCH/AHS Downlink: Inhibited SID_FIRST_P1
block of four radio bursts. Hence, the BTS must be able ot to send
actual codec payload along with the GsmL1_TchPlType_Amr_Onset The following procedure must be observed in case of a SID_FIRST must be inhibited.
primitive.
["mscgen"]
----
msc {
hscale = 2;
ms [label="MS"], phy [label="BTS-PHY"], bts [label="BTS"], mgw [label="MGW"];
...;
--- [label="Inhibited SID_FIRST_P1"];
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_SidFirstP1"];
ms <= phy [label="L1 burst (sub-block 3 of speech frame N-1 + sub-block 1 of SID_FIRST_P1)"];
ms <= phy [label="L1 burst (sub-block 4 of speech frame N-1 + sub-block 2 of SID_FIRST_P1)"];
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_SidFirstInh"];
phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr (N)"];
ms <= phy [label="L1 burst (block 1 of SID_FIRST_INH, sub-block 1 of speech frame N)"];
ms <= phy [label="L1 burst (block 2 of SID_FIRST_INH, sub-block 2 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 3 of speech frame N + sub-block 1 of speech frame N+1)"];
ms <= phy [label="L1 burst (sub-block 4 of speech frame N + sub-block 2 of speech frame N+1)"];
}
----
==== TCH/AHS Downlink: Inhibited SID_UPDATE
The following procedure must be observed in case of a SID_UPDATE must be inhibited.
["mscgen"]
----
msc {
hscale = 2;
ms [label="MS"], phy [label="BTS-PHY"], bts [label="BTS"], mgw [label="MGW"];
...;
--- [label="Inhibited SID_UPDATE"];
bts <= mgw [label="RTP (AMR FT=SID,Q=1)"];
phy => bts [label="PH-RTS.ind (TCH)"];
bts => phy [label="PH-DATA.req GsmL1_TchPlType_Amr (SID_UPDATE)"];
ms <= phy [label="L1 burst (sub-block 1+2 of SID_UPDATE)"];
ms <= phy [label="L1 burst (sub-block 3+4 of SID_UPDATE)"];
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_SidUpdateInh"];
phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr (N)"];
ms <= phy [label="L1 burst (block 1 of SID_UPDATE_INH, sub-block 1 of speech frame N)"];
ms <= phy [label="L1 burst (block 2 of SID_UPDATE_INH, sub-block 2 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 3 of speech frame N + sub-block 1 of speech frame N+1)"];
ms <= phy [label="L1 burst (sub-block 4 of speech frame N + sub-block 2 of speech frame N+1)"];
}
----
==== TCH/AHS Downlink: FACCH/H During DTX Operation
The following procedure must be observed in case of a FACCH/H frame must be inserted during DTX operation.
["mscgen"]
----
msc {
hscale = 2;
ms [label="MS"], phy [label="BTS-PHY"], bts [label="BTS"], mgw [label="MGW"];
...;
--- [label="FACCH/H During DTX Operation"];
bts <= mgw [label="FACCH/H"];
phy => bts [label="PH-RTS.ind (FACCH/H)"];
phy => bts [label="PH-RTS.ind (TCH/H)"];
phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr_Onset"];
phy <= bts [label="PH-DATA.req FACCH/H"];
ms <= phy [label="L1 burst (block 1 of SID_ONSET, sub-block 1 of FACCH/H frame)"];
ms <= phy [label="L1 burst (block 2 of SID_ONSET, sub-block 2 of FACCH/H frame)"];
phy => bts [label="PH-RTS.ind (TCH/H)"];
phy <= bts [label="PH-EMPTY-FRAME.req"];
ms <= phy [label="L1 burst (sub-block 3+4 of FACCH/H frame)"];
ms <= phy [label="L1 burst (sub-block 5+6 of FACCH/H frame)"];
phy => bts [label="PH-RTS.ind (FACCH/H)"];
phy => bts [label="PH-RTS.ind (TCH/H)"];
phy <= bts [label="PH-EMPTY-FRAME.req (FACCH/H)"];
phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr_SidFirstP1"];
ms <= phy [label="L1 burst (sub-block 7 of FACCH/H frame + sub-block 1 of SID_FIRST_P1)"];
ms <= phy [label="L1 burst (sub-block 8 of FACCH/H frame + sub-block 2 of SID_FIRST_P1)"];
phy => bts [label="PH-RTS.ind (TCH)"];
phy <= bts [label="PH-DATA.req GsmL1_TchPlType_Amr_SidFirstP2"];
ms <= phy [label="L1 burst (sub-block 3 of SID_FIRST_P1, sub-block 1 of SID_FIRST_P2)"];
ms <= phy [label="L1 burst (sub-block 4 of SID_FIRST_P1, sub-block 2 of SID_FIRST_P2)"];
}
----