165318520 How to Solve vs Rrc Rej Rl Fail

A Lot Of RRC Reject Caused by RL Failure In RNC21 In 8.8, HREY0098 Was The Top Site Time 08/08/2013 00:00 08/08/2013 01:00 08/08/2013 02:00 08/08/2013 03:00 08/08/2013 04:00 08/08/2013 05:00 08/08/2013 06:00 08/08/2013 07:00 08/08/2013 08:00 08/08/2013 09:00 08/08/2013 10:00 08/08/2013 11:00 08/08/2013 12:00 08/08/2013 13:00 08/08/2013 14:00 08/08/2013 15:00 08/08/2013 16:00 08/08/2013 17:00 08/08/2013 18:00 08/08/2013 19:00 08/08/2013 20:00 08/08/2013 21:00 08/08/2013 22:00 08/08/2013 23:00

RNC REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21

VS.RRC.Rej.RL.Fail 0 0 0 0 0 0 0 0 0 25 36 126 325 435 384 409 290 1258 4857 5950 8323 7262 1733 37

Time 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013 08/08/2013

RNC REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21 REYRNC21

NodeBId 2976 2977 2451 2934 2952 2954 2944 2962 2445 2448 2476

NODEBNAM VS.RRC.Rej.RL.Fail E HREY0098 13212 HREY0101 9332 HMAT0016 8613 HREY0019 253 HREY0062 15 HREY0068 11 HREY0041 4 HREY0082 3 HMAT0003 3 HMAT0008 3 HMAT0052 1

VS.RRC.Rej.RL.Fail Distribution In Different Hours

VS.RRC.Rej.RL.Fail Is Caused By CNBAP Overload

What is CNBAP? CNBAP(Common NodeB Application Part) descript the NodeB signaling traffic of IUB interface. One CNBAP means one RL establishment.

How to calculate CNBAP? CNBAP= PAR*

NBAP_RL_SETUP_REQ+ NBAP_RL_ADD_REQ+ NBAP_RL_RECFG_PREP*2

/3600

CNBAP we get from statistic is a average value, so we need to multiply a coefficient (PAR) to get the peak value. PAR means peak to average rate, usually 1.6 to 2.

When the calculated CNBAP reached 60% of the CNBAP capacity, we need to suggest customer to extend the hardware.

CNBAP Of HREY0098 Is More Than 100 CNBAP/S In Busy Hours

CNBAP= PAR* NBAP_RL_SETUP_REQ+ NBAP_RL_ADD_REQ+ NBAP_RL_RECFG_PREP*2 PAR=2

/3600

CNBAP Capacity Of HREY0098 Is 110 CNBAP/S

HERY0098 current software version is V200R012C00SPC450, and configured 1 WMPT+2WBBP. So the CNBAP capacity of HREY0098 is 110 CNBAP/S.

Solution

Site HERY0098 CNBAP overload caused VS.RRC.Rej.RL.Fail. Suggest to extend 1 WBBP and update the software version to V200R013C00SPCxx0. 1 WMPT+3WBBP with software version V200R013C00SPCxx0 can support 175 CNBAP/S.