mytelcolearning

On Counter level analysis its found that almost 98% RRC failures are contribution from timer expiry As all other timers were already in GPL at Max values with  tHalfRrcCon (eNB internal timer) :-default value 3000ms. This timer in Nokia was hardcoded in earlier SW version Trial Impact 3s to 4s Data Traffic increased by 1.8% and Volte traffic by 9.8% 3% Cells with RRC<98% improved in BBH 17% Cell with RRC<98% Improved in 24 Hrs 9% reduction in timer expiry RRC failures  Rest all KPIs are intact and almost no changes in stats 

LTE2026: RRC Signaling Robustness -feature provides an increase in the reliability of the downlink radio resource control (RRC) signaling messages on the physical downlink shared channel (PDSCH) and the physical downlink control channel (PDCCH) to reduce the latency for the RRC procedures and to improve call setup and handover (HO) success rates. dlSrbMimoMode :- This parameter determines the MIMO mode to be used for Downlink SRB traffic  1: TxDiv  2: SpatialMultiplexing Suggestion:- purpose of changes that SRB1 do not required capacity so we can use dlmimomode tx diversity instead of special multiplexing so that dl can be more reliable and that can give benefit in success rate I did changes for worst cells in my network from special multiplexing to TX diversity and good improvement seen 

In LTE, control plane messages and user plane traffic can be traced from various interfaces. To trace all control messages related to call establishment following interfaces should be traced: S1‐MME, S6a, and S11, tools such as Wireshark, and others can be easily connected to monitor, these interfaces through a network hub or router LTE network element signaling load per application. Reference:-LTE Optimization Engineering Handbook by Xincheng Zhang