Change in osmocom-bb[master]: l1ctl_proto.h: extend ccch_mode enum with CBCH

[Vadim Yanitskiy]

Hello Harald Welte, Jenkins Builder, 

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

    https://gerrit.osmocom.org/11183

to look at the new patch set (#2).

Change subject: l1ctl_proto.h: extend ccch_mode enum with CBCH
......................................................................

l1ctl_proto.h: extend ccch_mode enum with CBCH

According to GSM TS 05.02, there are two ways to enable CBCH:

  a) replace sub-slot number 2 of CCCH+SDCCH/4 (comb. V),
  b) replace sub-slot number 2 of SDCCH/8 (comb. VII).

Unlike SDCCH/8 (case b), CCCH+SDCCH/4 can be allocated on TS0
only, and shall not use frequency hopping. This means that
implementing CBCH support on SDCCH/8 would require much more
efforts than on combined CCCH+SDCCH/4, as in last case CBCH
messages can be received without the need to switch from
idle to dedicated mode.

This change introduces a new ccch_mode item, which should be
used by the higher layers to indicate presence of CBCH channel
on C0/TS0, so the PHY would enable decoding of CBCH messages
on CCCH+SDCCH/4 (case a) in idle mode.

Regarding to CBCH on SDCCH/8 (case b), it makes sense to
extend the 'l1ctl_dm_est_req', so it would be handled in
dedicated mode on request from the higher layers.

Change-Id: Ia94ebf22a2ec439dfe1f31d703b832ae57b48ef2
---
M include/l1ctl_proto.h
M src/host/trxcon/l1ctl.c
M src/target/firmware/layer1/l23_api.c
M src/target/firmware/layer1/prim_fbsb.c
4 files changed, 11 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.osmocom.org:29418/osmocom-bb refs/changes/83/11183/2
-- 
To view, visit https://gerrit.osmocom.org/11183
To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings

Gerrit-Project: osmocom-bb
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ia94ebf22a2ec439dfe1f31d703b832ae57b48ef2
Gerrit-Change-Number: 11183
Gerrit-PatchSet: 2
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20181001/ad4b643c/attachment.htm>