Hi.
I'm troubleshooting peculiar use case with packet access and osmo-bts-trx. There are
2 options for ME to acknowledge reception of control packet to PCU according to 3GPP
TS 44.060 ยง 11.2.2:
1) Packet Control Acknowledgement message
2) 4 identical access bursts
The latter can be both 8-bit RACH and 11-bit RACH (not supported by osmo-bts-trx
yet). The choice of response format is defined by OpenBSC in SI: 1) is default, 2)
can be activated with "gprs control-ack-type-rach" option.
The problem is that I don't understand how 2) will be handled by OsmoTRX? Shall I
expect 4 consecutive RACH messages via rx_rach_fn() in scheduler_trx.c in
osmo-bts-trx? Shall it be some other message/function? Will it be ignored/dropped
altogether by OsmoTRX?
--
Max Suraev <msuraev(a)sysmocom.de>
http://www.sysmocom.de/
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