Change in osmo-gsm-manuals[master]: TRXD: clarify description of NOPE / IDLE indications

[fixeria]

fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-gsm-manuals/+/22619 )


Change subject: TRXD: clarify description of NOPE / IDLE indications
......................................................................

TRXD: clarify description of NOPE / IDLE indications

Change-Id: Idaa1c597cbfd198a0f1802ac01b210d42369ee95
Related: SYS#4895, OS#4941, OS#4006
---
M common/chapters/trx_if.adoc
1 file changed, 22 insertions(+), 4 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-manuals refs/changes/19/22619/1

diff --git a/common/chapters/trx_if.adoc b/common/chapters/trx_if.adoc
index efbfd1b..c86e75e 100644
--- a/common/chapters/trx_if.adoc
+++ b/common/chapters/trx_if.adoc
@@ -386,6 +386,24 @@
 }
 ----
 
+.TRXDv1 NOPE / IDLE indication message structure
+[packetdiag]
+----
+{
+	colwidth = 32
+	node_height = 40
+
+	0-3:	VER(1)
+	4:	RES
+	5-7:	TN
+	8-39:	FN
+	40-47:	RSSI
+	48-63:	TOA256
+	64-71:	MTS (NOPE.ind)
+	72-87:	C/I
+}
+----
+
 VER: 4 bits::
 TRXD header version, v0 and v1 are specified so far.
 
@@ -451,10 +469,10 @@
 ----
 
 IDLE / nope frame indication::
-The bit number 7 (MSB) is set to high when either nothing has been detected, or
-during IDLE frames, so noise levels can be delivered, and avoid clock gaps on
-the BTS side. Other bits are ignored, and should be set to low (`0`) in this
-case.
+The bit number 7 (MSB) is set to high when either nothing has been detected, so
+the BTS scheduler keeps processing bursts without gaps, or during IDLE frames,
+so the current noise levels can be delivered.  Other bits are ignored, and should
+be set to low (`0`) in this case.  The field "Soft-bits" is omited.
 
 Modulation and TS set number::
 GMSK has 4 sets of training sequences (see tables 5.2.3a-d), while 8-PSK (see

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Gerrit-Project: osmo-gsm-manuals
Gerrit-Branch: master
Gerrit-Change-Id: Idaa1c597cbfd198a0f1802ac01b210d42369ee95
Gerrit-Change-Number: 22619
Gerrit-PatchSet: 1
Gerrit-Owner: fixeria <vyanitskiy at sysmocom.de>
Gerrit-MessageType: newchange
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