VoLTE RAN Case Study - Ericsson

VoLTE RAN Case Study

Contents 

VoLTE oLTE Service Ser vices s

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Various Tools used for optimization optimizat ion

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VoLTE RAN Case Studies

  Take  Take

Away Away

VoLTE SERVICES Services • • • •

VoLTE RAN ptimization VoLTE !order ptimization VoLTE "arameter and Con#$uration Audit VoLTE E%E Analysis

Analysis ( RAN RAN &  & EPC EPC )  ) • &rive lo$s • 'ETR ( )%* S+*RR S+*RRC, C, • -S scores • S++ • R. / 0. • S0i • SI" si$nalin$ • E"C traces

Tools:

Accomplishments:

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 TE-S &iscovery IT1 !usiness 23ect ERTT VoLTE E%E Analyzer / NE 4IRES5AR1  EC

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ptimized 67778 sites for AT/T AT/T and +9778 sites for Sin$Tel SRVCC !order optimization -T RRC re:esta2lis;ment =

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'E was served 2y cell ! ("CI B6,? Event A is tri$$ered for I=

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l Cel l

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&ue to poor R< conditions* RRC ReCon#$ ms$ sent 2y EN! is missed out? B? !efore t;e old EN! can detect t;e RL%

2servation Counter !ased !%T;res;old%Rscp'traoset was was c;an$ed from 7 to +7 eectively reducin$ reducin$ !%T;res;old%Rscp'tra to :+7Bd!m?

Retaina2ility Retaina2ility s;ows sli$;t improvement after t;e c;an$es ? SRVCC attempt reduced as e.pected and SRVCC SRVCC success rate improved w;en compared to same amount of attempts 2efore?

 Tak  T ake e Away Away +?

Normal RRC Normal RRC connection connection release release need need not necessarily necessarily mean not end end to VoL VoLTE TE call? -ismatc; in t;e 2elow parameters paramet ers will lead to 2earer drop?  rlc-ode  rlcSnLen$t;  pdcpSnLen$t;  ro;cEna2led

%?

It is important important to note note t;at RRC RRC drop drop alone do do not conclude conclude t;at t;at t;e VoL VoLTE TE call ;as dropped?