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fixeria gerrit-no-reply at lists.osmocom.orgfixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-gsm-manuals/+/24508 ) Change subject: TRXDv2: add primary/shadow classification for VAMOS PDUs ...................................................................... TRXDv2: add primary/shadow classification for VAMOS PDUs Introduce a new flag (1-bit field) indicating whether a VAMOS PDU is for a _primary_ ('0'B) or for a _shadow_ ('1'B) timeslot. This field shall be present only in the Uplink VAMOS PDUs, which unlike the Downlink (AQPSK) PDUs are sent separately. This will simplify routing of such PDUs in osmo-bts. Change-Id: Ie00a12824938c6a65480bde1af364dcc9febb8f7 Related: SYS#4895, OS#4941, OS#4006 --- M common/chapters/trx_if.adoc 1 file changed, 22 insertions(+), 17 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-manuals refs/changes/08/24508/1 diff --git a/common/chapters/trx_if.adoc b/common/chapters/trx_if.adoc index f4884f0..5f7b220 100644 --- a/common/chapters/trx_if.adoc +++ b/common/chapters/trx_if.adoc @@ -496,7 +496,7 @@ 0-4: RFU 5-7: TN 8: BATCH - 9: RFU + 9: SHADOW 10-15: TRXN 16-23: MTS 24-31: RSSI @@ -519,6 +519,9 @@ BATCH: 1 bit:: This bit indicates whether a batched PDU follows (see <<trx_if_pdu_batching>>). +SHADOW: 1 bit:: +This bit indicates whether this is a _shadow PDU_ (see <<trx_if_pdu_vamos>>). + TRXN: 6 bits:: The transceiver (PHY channel) number this PDU is coming from. @@ -823,27 +826,29 @@ In the Uplink direction though, one or even both of the two bursts may be lost (e.g. due to high noise figures), so they shall always be sent in two separate PDUs. The missing bursts shall be substituted by NOPE indications, so it's -always a pair of _batched PDUs_. The `MTS` field shall indicate the use of -`GMSK` modulation. +always a pair of _batched PDUs_. First PDU in a pair is called _primary PDU_, +the second is called _shadow PDU_. This is additionally indicated by the +`SHADOW` field, which is set to {bit-zero} and {bit-one}, respectively. The +`MTS` field shall indicate the use of `GMSK` modulation if the burst is present. .Example: Uplink datagram containing batched VAMOS PDUs (both present) ---- -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -+--------+----------------+----------+----------------------------------------+ -| TRXN=N | TDMA FN=F TN=T | Mod=GMSK | Soft-bits for V0 (148 bytes) | -+--------+----------------+----------+----------------------------------------+ -| TRXN=N | TDMA FN=F TN=T | Mod=GMSK | Soft-bits for V1 (148 bytes) | -+--------+----------------+----------+----------------------------------------+ -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ++--------+----------------+----------+----------+------------------------------+ +| TRXN=N | TDMA FN=F TN=T | SHADOW=0 | Mod=GMSK | Soft-bits for V0 (148 bytes) | ++--------+----------------+----------+----------+------------------------------+ +| TRXN=N | TDMA FN=F TN=T | SHADOW=1 | Mod=GMSK | Soft-bits for V1 (148 bytes) | ++--------+----------------+----------+----------+------------------------------+ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ---- .Example: Uplink datagram containing batched VAMOS PDUs (one lost) ---- -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -+--------+----------------+----------+----------------------------------------+ -| TRXN=N | TDMA FN=F TN=T | Mod=GMSK | Soft-bits for V0 (148 bytes) | -+--------+----------------+----------+----------------------------------------+ -| TRXN=N | TDMA FN=F TN=T | NOPE.ind | -+--------+----------------+----------+ -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ++--------+----------------+----------+----------+------------------------------+ +| TRXN=N | TDMA FN=F TN=T | SHADOW=0 | Mod=GMSK | Soft-bits for V0 (148 bytes) | ++--------+----------------+----------+----------+------------------------------+ +| TRXN=N | TDMA FN=F TN=T | SHADOW=1 | NOPE.ind | ++--------+----------------+----------+----------+ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ---- -- To view, visit https://gerrit.osmocom.org/c/osmo-gsm-manuals/+/24508 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-gsm-manuals Gerrit-Branch: master Gerrit-Change-Id: Ie00a12824938c6a65480bde1af364dcc9febb8f7 Gerrit-Change-Number: 24508 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria <vyanitskiy at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210602/3f34c078/attachment.htm>