TBF differences for Uplink and Downlink

Holger Hans Peter Freyther hfreyther at sysmocom.de
Thu Oct 17 11:05:47 UTC 2013


On Thu, Oct 17, 2013 at 12:03:23PM +0200, Andreas Eversberg wrote:

> there is a "one phase access", where devices request a channel for
> uplink TBF, but we don't know the TLLI until we get a valid RLC/MAC
> block. for every downlink TBF we know the TLLI for sure, because it is
> contained in the LLC data frame from SGSN.

thanks for the explanation. So the tlli is always valid in the DL
direction and sometimes valid in the UL.

Code duplication (as witnessed with the missing tfi assignment in
(a) algorithm) has the danger that one codepath is fixed while the
others are left broken.

I will then use the version with tlli_valid and kill the code clones.

holger


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- Holger Freyther <hfreyther at sysmocom.de>       http://www.sysmocom.de/
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