diff options
| author | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2021-01-15 17:58:56 +0100 |
|---|---|---|
| committer | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2021-02-12 00:07:48 +0100 |
| commit | ebf6a7234655ece7056f1bfade11384dc2758fe6 (patch) | |
| tree | 64eb355c32658c24295e088640e10debe202ce0c | |
| parent | 5b44519fd32875e4d8d685d79253a3714cc90fd8 (diff) | |
TRXD: clarify description of NOPE / IDLE indications
| -rw-r--r-- | common/chapters/trx_if.adoc | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/common/chapters/trx_if.adoc b/common/chapters/trx_if.adoc index e1aef4a..ef2740b 100644 --- a/common/chapters/trx_if.adoc +++ b/common/chapters/trx_if.adoc @@ -398,6 +398,24 @@ padding existence is completely dropped. } ---- +.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. @@ -463,10 +481,10 @@ is used in EDGE). ---- 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 |