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neels gerrit-no-reply at lists.osmocom.orgneels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/20380 ) Change subject: doc/location_services_ta.ladder ...................................................................... doc/location_services_ta.ladder Change-Id: I49186c6bb076dad9894b100be711e10f2c49e609 --- A doc/location_services_ta.ladder 1 file changed, 72 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/80/20380/1 diff --git a/doc/location_services_ta.ladder b/doc/location_services_ta.ladder new file mode 100644 index 0000000..c536ef1 --- /dev/null +++ b/doc/location_services_ta.ladder @@ -0,0 +1,72 @@ +{hscale=2} + +ms = MS/BTS +bsc = BSC +smlc = SMLC +msc = MSC + +||| Location Services (LCS): Perform Location Request using TA + +||| +--- MS in DEDICATED MODE (currently active) + +ms > bsc earlier Measurement Report provides Timing Advance + +bsc < msc PERFORM LOCATION REQUEST + 3GPP TS 48.008 3.2.1.71 + +bsc > smlc BSSMAP-LE PERFORM LOCATION REQUEST + 3GPP TS 49.031 9.1 + with BSSLAP APDU = TA Layer3 + 3GPP TS 48.071 4.2.8 + +smlc () . SMLC uses TA included in TA Layer3 + +bsc < smlc BSSMAP-LE PERFORM LOCATION RESPONSE + 3GPP TS 49.031 9.2 + +bsc > msc PERFORM LOCATION RESPONSE + 3GPP TS 48.008 3.2.1.72 + +... +... +--- MS in IDLE MODE (not connected) + +bsc < msc PERFORM LOCATION REQUEST + 3GPP TS 48.008 3.2.1.71 + +bsc > smlc BSSMAP-LE PERFORM LOCATION REQUEST + 3GPP TS 49.031 9.1 + +smlc () . SMLC needs TA information, + asks BSC via BSSLAP + +bsc < smlc BSSMAP-LE CONNECTION ORIENTED INFORMATION + 3GPP TS 49.031 9.12 + with BSSLAP APDU = TA Request + 3GPP TS 48.071 4.2.1 + + +ms < bsc RR Paging Request + 3GPP TS 48.018 9.1.22-24 + +ms > bsc RSL CHANNEL REQUIRED + 3GPP TS 48.058 8.5.3 + includes Access Delay (9.3.17) == Timing Advance + +ms > bsc RR Paging Response + 3GPP TS 48.018 9.1.25 + +ms < bsc RF CHANNEL RELEASE + 3GPP TS 48.058 8.4.14 + +bsc > smlc BSSMAP-LE CONNECTION ORIENTED INFORMATION + 3GPP TS 49.031 9.12 + with BSSLAP APDU = TA Response + 3GPP TS 48.071 4.2.2 + +bsc < smlc BSSMAP-LE PERFORM LOCATION RESPONSE + 3GPP TS 49.031 9.2 + +bsc > msc PERFORM LOCATION RESPONSE + 3GPP TS 48.008 3.2.1.72 -- To view, visit https://gerrit.osmocom.org/c/osmo-bsc/+/20380 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bsc Gerrit-Branch: master Gerrit-Change-Id: I49186c6bb076dad9894b100be711e10f2c49e609 Gerrit-Change-Number: 20380 Gerrit-PatchSet: 1 Gerrit-Owner: neels <nhofmeyr at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20201001/9003f061/attachment.htm>