cellular-infrastructure
/
osmo-gsm-manuals
mirror of https://gerrit.osmocom.org/osmo-gsm-manuals
9
0
Fork 0
Code Releases Activity

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
This commit is contained in:
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

111
OsmoBTS/abis/rtp-amr.adoc
View File

@ -1087,7 +1087,110 @@ msc {
}
----
DLOS2:: The SID_ONSET and the first voice frame are sent in the same
block of four radio bursts. Hence, the BTS must be able ot to send
actual codec payload along with the GsmL1_TchPlType_Amr_Onset
primitive.
==== TCH/AHS Downlink: Inhibited SID_FIRST_P1
The following procedure must be observed in case of a SID_FIRST must be inhibited.
["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)"];
}
----