<div dir="ltr">Hello everybody.<div><br></div><div>I was successful in running the calypso BTS by using the openBTS (without gprs).</div><div><br><div><br></div><div style>Now I am trying to setup a GPRS N/w with the guide provided at <a href="http://wush.net/trac/rangepublic/wiki/GPRS">http://wush.net/trac/rangepublic/wiki/GPRS</a> and by using the same Calypso BTS. Want to know whether if this can work out. If not I want to do some minimal implementation (GPRS attach or just activate a PDP context).</div>
<div style><br></div><div style>I followed the tutorial and I am here with logs from PCU and SGSN. </div></div><div style><br></div><div style>LOG from Osmo-PCU</div><div style><br></div><div style><div><font color="#ff0000"># ./osmo-pcu -n 06 -m 234</font></div>
<div><font color="#ff0000"><0001> pcu_l1_if.cpp:375 BTS available</font></div><div><font color="#ff0000"><0001> pcu_l1_if.cpp:91 Sending activate request: trx=0 ts=6</font></div><div><font color="#ff0000"><0001> pcu_l1_if.cpp:502 PDCH: trx=0 ts=6</font></div>
<div><font color="#ff0000"><0001> pcu_l1_if.cpp:91 Sending activate request: trx=0 ts=7</font></div><div><font color="#ff0000"><br></font></div><div><font color="#ff0000"><0001> pcu_l1_if.cpp:502 PDCH: trx=0 ts=7</font></div>
<div><font color="#ff0000"><0009> gprs_bssgp_pcu.cpp:508 NS-VC 4 is unblocked.</font></div><div><font color="#ff0000"><0008> gprs_bssgp_pcu.cpp:549 Sending reset on BVCI 0</font></div><div><font color="#ff0000"><0008> gprs_bssgp_pcu.cpp:557 Sending reset on BVCI 7</font></div>
<div><font color="#ff0000"><0008> gprs_bssgp_pcu.cpp:565 Sending unblock on BVCI 7</font></div><div><font color="#ff0000"><br></font></div><div><font color="#ff0000"><0001> pcu_l1_if.cpp:296 RACH request received: sapi=1 qta=1, ra=120, </font></div>
<div><font color="#ff0000"> fn=961674<br></font></div><div><font color="#ff0000"><0002> gprs_rlcmac_data.cpp:1901 Got IMM.ASS confirm, but rest octets </font></div><div><font color="#ff0000"> do not start with bit sequence 'HH01' (Packet Downlink</font><span style="color:rgb(255,0,0)">Assignment)</span></div>
<div><font color="#ff0000">0002> gprs_rlcmac_data.cpp:564 TBF T3169 timeout during transsmission</font></div><div><font color="#ff0000"><0002> gprs_rlcmac_data.cpp:82 - Assignment was on CCCH</font></div><div><font color="#ff0000"><0002> gprs_rlcmac_data.cpp:88 - No uplink data received yet</font></div>
<div><font color="#ff0000"><br></font></div><div><font color="#ff0000"><div><br></div><div><0001> pcu_l1_if.cpp:296 RACH request received: sapi=1 qta=1, ra=124, </div><div> fn=963005</div><div><0002> gprs_rlcmac_data.cpp:1901 Got IMM.ASS confirm, but rest octets </div>
<div> do not start with bit sequence 'HH01' (Packet DownlinkAssignment)</div><div>0002> gprs_rlcmac_data.cpp:564 TBF T3169 timeout during transsmission</div><div><0002> gprs_rlcmac_data.cpp:82 - Assignment was on CCCH</div>
<div><0002> gprs_rlcmac_data.cpp:88 - No uplink data received yet</div></font></div><div><br></div><div style>After a successful GSM attach procedure the phone is accessing the BTS on RACH for a GPRS attach.</div><div style>
This set of statements repeats as long as the phone trying to do a GPRS attach send requests on RACH. It seems like the phone BTS receives RACH and a channel is assigned (IMM ASS, I can see this TBF assignment in Wireshark), but I doubt whether this IMM ASS has reached the phone that is trying to GPRS attach.</div>
<div style><br></div><div style><br></div><div style>Log from SGSN</div><div style><br></div><div><font color="#ff0000">#./osmo-sgsn </font></div><div><font color="#ff0000"><0010> gprs_ns.c:171 NSVCI=65534 Creating NS-VC</font></div>
<div><font color="#ff0000"><0010> gprs_ns.c:171 NSVCI=65535 Creating NS-VC</font></div><div><font color="#ff0000"><0010> gprs_ns.c:806 Creating NS-VC for BSS at <a href="http://192.168.111.144:5948">192.168.111.144:5948</a></font></div>
<div><font color="#ff0000"><0010> gprs_ns.c:679 NSEI=65535 Rx NS RESET (NSVCI=0, cause=O&M intervention)</font></div><div><font color="#ff0000"><0010> gprs_ns.c:538 NSEI=8 Tx NS RESET ACK (NSVCI=4)</font></div>
<div><font color="#ff0000"><0010> gprs_ns.c:679 NSEI=4 Rx NS RESET (NSVCI=8, cause=PDU not compatible with protocol state)</font></div><div><font color="#ff0000"><0010> gprs_ns.c:538 NSEI=8 Tx NS RESET ACK (NSVCI=4)</font></div>
<div><font color="#ff0000"><0010> gprs_ns.c:865 NSEI=8 Rx NS UNBLOCK</font></div><div><font color="#ff0000"><0010> gprs_ns.c:865 NSEI=8 Rx NS UNBLOCK</font></div><div><font color="#ff0000"><0011> gprs_bssgp.c:249 BSSGP BVCI=0 Rx RESET cause=O&M intervention</font></div>
<div><font color="#ff0000"><0011> gprs_bssgp.c:249 BSSGP BVCI=7 Rx RESET cause=O&M intervention</font></div><div><font color="#ff0000"><0011> gprs_bssgp.c:272 Cell 234-6-1000-0 CI 0 on BVCI 7</font></div><div>
<font color="#ff0000"><0011> gprs_bssgp.c:344 BSSGP BVCI=7 Rx BVC-UNBLOCK</font></div><div><font color="#ff0000"><0011> gprs_bssgp.c:747 BSSGP BVCI=7 Rx Flow Control BVC</font></div><div><font color="#ff0000"><0011> gprs_bssgp.c:747 BSSGP BVCI=7 Rx Flow Control BVC</font></div>
<div style> </div><div style>and The last statement repeats.........</div><div style><br></div><div style>the statement </div><div style><span style="color:rgb(255,0,0)">Cell 234-6-1000-0 CI 0 on BVCI 7</span><br></div><div style>
<font color="#000000">The RAI and Cell ID are 0 and 0.... But when I read the code gprs_bssgp.c it says these parameters will be received from BSS. If I set these parameters in OpenBTS.db similar to LAC=RAC but still there is no effect.</font></div>
<div style><font color="#000000"><br></font></div><div style><font color="#000000"><br></font></div><div style><font color="#000000">I am running ./ggsn, ./osmo-sgsn, ./osmo-pcu, ./openbts </font></div><div style><font color="#000000"><br>
</font></div><div style><span style="color:rgb(255,0,0)">Is osmo-nitb needed along with SGSN and PCU.</span><font color="#000000"><br></font></div><div style><span style="color:rgb(255,0,0)"><br></span></div><div style><font color="#000000">I fail to do GPRS attcach in this situation. Can someone please give your comments and guide me with some suggestions.</font></div>
<div style><font color="#000000"><br></font></div><div style><font color="#000000"><br></font></div><div style><font color="#000000">regards,</font></div><div style><font color="#000000"><br></font></div><div style><font color="#000000">Altaf</font></div>
<div style><span style="color:rgb(255,0,0)"><br></span></div><div style><span style="color:rgb(255,0,0)"> </span></div><div style><br></div><div style><br></div><div><br></div></div></div>