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laforge gerrit-no-reply at lists.osmocom.orglaforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/15445 Change subject: doc: Update Abis manual RSL section with ETWS related infomration ...................................................................... doc: Update Abis manual RSL section with ETWS related infomration Change-Id: I969153a204c167783ba394c9a911ff4484ded759 --- M doc/manuals/abis/rsl.adoc 1 file changed, 48 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/45/15445/1 diff --git a/doc/manuals/abis/rsl.adoc b/doc/manuals/abis/rsl.adoc index f66142d..86beaa2 100644 --- a/doc/manuals/abis/rsl.adoc +++ b/doc/manuals/abis/rsl.adoc @@ -81,6 +81,8 @@ .3+.| <<pdch_deact>> | <<rsl_pdch_deact>> | RSL PDCH Deactivation | <- | Received | <<rsl_pdch_deact_ack>> | RSL PDCH Deactivation ACK | -> | Sent | <<rsl_pdch_deact_nack>> | RSL PDCH Deactivation NACK | -> | Sent +5+<| *COMMON CHANNEL MANAGEMENT MESSAGES* +.3+.| <<etws>> | <<OSMO_ETWS_CMD>> | Osmocom ETWS Command | <- | Received |=== ==== Messages Not Implemented by OsmoBTS @@ -455,6 +457,25 @@ include::dyn_ts_osmocom_style2.msc[] ---- +[[etws]] +=== ETWS (Earthquake and Tsunami Warning System) + +ETWS as specified in 3GPP TS 23.041 includes not only notification via +SMSCB, but also so-called Primary Notifications (PN). The ETWS PN are +transmitted + + * by the BSC to all subscribers with active dedicated channels + * by the BTS on the PCH to all subscribers in idle mode + * by the PCU on the PACCH to all subscribers with active TBF + +Unfortunately, 3GPP forgot to update their specifications with any +information as to how the ETWS PN is transmitted from BSC to BTS in +a portable way, and Osmocom had to invent their own non-standard +signaling for it. + +See <<OSMO_ETWS_CMD>> for the Osmocom implementation. + + === Message Formats and Contents [[rsl_crcx_msg]] @@ -754,6 +775,32 @@ NOTE:: This message is *not* used by Osmocom style dynamic channels +[[OSMO_ETWS_CMD]] +==== Osmocom ETWS Command + +This message is sent by the BSC to transfer the ETWS Primary Notification (PN) +from BSC to BTS and enable/disable transmission of ETWS PN by the BTS. For more +information about ETWS, see 3GPP TS 23.041. + +If the ETWS PN length is > 0, the BTS will immediately start transmission +of the received ETWS PN on the PCH using P1 Rest Octets. It will also forward +he ETWS PN to the PCU to enable the PCU to transmit it via PACCH on active TBF. + +If the ETWS PN length is 0, the BTS will stop any ETWS PN broadcast via the PCH. + +The Channel Number IE is set to the Downlink CCCH (PCH). + +[options="header"] +[cols="30%,25%,15%,15%,15%"] +|=== +| INFORMATION ELEMENT | REFERENCE | PRESENCE | FORMAT | LENGTH +| Message discriminator | 08.58 9.1 | M | V | 1 +| Message type | <<own_msg_types>> | M | V | 1 +| Channel number | 08.58 9.3.1 | M | TV | 2 +| SMSCB Message | 08.58 9.3.42 | M | TLV | 2-58 +|=== + + === Information Element Codings [[own_msg_types]] @@ -776,6 +823,7 @@ | 0x77 | Delete Connection (DLCX) | <<rsl_dlcx_msg>> | 0x78 | Delete Connection (DLCX) ACK | <<rsl_dlcx_msg_ack>> | 0x79 | Delete Connection (DLCX) NACK | <<rsl_dlcx_msg_nack>> +| 0x7f | Osmocom ETWS Command | <<OSMO_ETWS_CMD>> | 0x48 | PDCH Activate | <<rsl_pdch_act>> | 0x49 | PDCH Activate ACK | <<rsl_pdch_act_ack>> | 0x4a | PDCH Activate NACK | <<rsl_pdch_act_nack>> -- To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/15445 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Change-Id: I969153a204c167783ba394c9a911ff4484ded759 Gerrit-Change-Number: 15445 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge at gnumonks.org> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20190907/8dfc3bf9/attachment.htm>