PCU sends invalid block number to L1

Minh-Quang Nguyen minh-quang.nguyen at nutaq.com
Mon May 2 13:32:12 UTC 2016


Hi All,

 

We have noticed that the PCU sends invalid block number to L1 in DSP leading to unexpected message warning in DSP "GsmL1_PhDataReq(1) : Unexpected burst (Invalid blockNumber) [2!=1, SAPI 21-21]]".

 

After an investigation, we observe that the 'pcu_rx_rts_req' function in pcu_l1_if.cpp receives invalid block number from BTS.

Looking at the BTS side, the calculation of L1SAP_FN2PTCCHBLOCK defined as '#define L1SAP_FN2PTCCHBLOCK(fn) ((fn / 52) & 7)' does not seem to be valid for expected PTCCH block numbers B0, B1,B2,B3 defined in Table 6 in TS 05.02 version 8.11.0.

 

What do you think about re-define the calculation of the L1SAP_FN2PTCCHBLOCK?  

 

Regards,

 

Minh-Quang Nguyen

 

Concepteur logiciel  |  Software designer GSM/Network



 

T. 418 914-7484 x2296  |  1 855 914-7484  |  F. 418 914-9477
2150, Cyrille-Duquet, Québec (Québec)  G1N 2G3 CANADA



 

minh-quang.nguyen at nutaq.com <mailto:minh-quang.nguyen at nutaq.com> 
www.nutaq.com <http://www.nutaq.com/>  

 

QUEBEC MONTREAL NEW YORK <http://www.nutaq.com/signature/nutaq_q_m_ny.jpg> 

 

Facebook <http://www.facebook.com/pages/Nutaq-Innovation/351864938229900>  Twitter <https://twitter.com/NutaqInnovation>  LinkedIn <http://www.linkedin.com/company/Nutaq>  YouTube <http://www.youtube.com/NutaqInnovation> 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/osmocom-net-gprs/attachments/20160502/09836164/attachment-0001.html>


More information about the osmocom-net-gprs mailing list