Attention is currently required from: pespin.

Hello Jenkins Builder, pespin,

I'd like you to reexamine a change. Please visit

https://gerrit.osmocom.org/c/osmo-pcu/+/34058

to look at the new patch set (#3).

Change subject: pcu_l1_if: add support for PCU_IF_SAPI_AGCH_2 for PCUIF v.11 ......................................................................

pcu_l1_if: add support for PCU_IF_SAPI_AGCH_2 for PCUIF v.11

When an downlink IMMEDIATE ASSIGNMENT message is sent through the PCH, an IMSI is always required in order to be able to calculate the paging group. However, when the downlink IMMEDIATE ASSIGNMENT has to be sent before the MS has completed the GMM ATTACH REQUEST, the IMSI is still unknown. In this case we may assume that the MS is still in non-DRX mode, which means it listens on all CCCH blocks (PCH and AGCH).

This means we may send the IMMEDIATE ASSIGNMENT through the AGCH in this situation. This will also have the advantage that the scheduling through the AGCH will have less latency than the paging queue.

Unfortunately the SAPI PCU_IF_SAPI_AGCH only supports sending whole MAC blocks, so it won't be possible to attach a TLLI that can be used for confirmation. To fix this, let's add a new SAPI_PCUI_IF_AGCH_2, that works similar as SAPI PCU_IF_SAPI_PCH_2 and use it to send the IMMEDIATE ASSIGNMENT through the AGCH.

CAUTION: This patch breaks compatibility with current master osmo-bts and osmo-bsc (see "Depends")

Related: OS#5927 Depends: osmo-bts.git I29858fa20ad8bd0aefe81a5c40ad77a2559a8c10 Change-Id: I9effdcec1da91a6e2e7a7c41f95d3300ad1bb292 --- M include/osmocom/pcu/pcuif_proto.h M src/bts.cpp M src/pcu_l1_if.cpp M src/pcu_l1_if.h 4 files changed, 98 insertions(+), 6 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-pcu refs/changes/58/34058/3