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Called Party in Roaming

Roaming Principles Charging. Called Party in Roaming. HLR. HLR. SCP. (iii) PRN, resp (MSRN). (ii) PRN. (i) SRI. (iv) SRI, resp (MSRN). GMSC MSC/VLR. MSC/ VLR. CAU-B. 0 CSP MSRN*. LDO. A. B is in roaming. B. MSRN*=Mobile Station Roaming Number

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Called Party in Roaming

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  1. Roaming PrinciplesCharging Called Party in Roaming HLR HLR SCP (iii) PRN, resp (MSRN) (ii) PRN (i) SRI (iv) SRI, resp (MSRN) GMSC MSC/VLR MSC/ VLR CAU-B 0 CSP MSRN* LDO A B is in roaming B MSRN*=Mobile Station Roaming Number no formato nacional Called Party Pays Calling Party Pays

  2. Roaming PrinciplesCharging with Call Forwarding Called Party with Call Forwarding Service HLR HLR SCP (iii) PRN, resp (MSRN) (ii) PRN (i) SRI (iv) SRI, resp (MSRN) GMSC MSC/VLR MSC/ VLR CAU-B 0 CSP MSRN* LDO A B is in roaming B 0 CSP CAU-C CFNRc / CFNRy 0 CSP CAU-C CFU Called Party Pays Called Party Pays Called Party Pays Calling Party Pays

  3. Charging of Call ForwardingANATEL Regulation 245, art. 77° A chamada dirigida a Usuário Visitante será tratada como composta por duas chamadas para efeito de faturamento. § 3º Aplica-se ao disposto neste artigo às chamadas reencaminhadas para outro Código de Acesso a pedido do Usuário, sendo que nesta hipótese a segunda chamada tem origem na Área de Registro do Usuário e destino no Código de Acesso para o qual foi reencaminhada a chamada. • GSM Postpaid • Optimal Routing at Late Call Forwarding optional feature • TDMA Postpaid • Already Supported • PrePaid (GSM and TDMA) • The collect call restrictions for terminating calls in SMP prepaid subscribers are also applied.

  4. 019 9165 4321 Signaling Traffic Call Forwarding, National Roaming - 1 of 3Terminated call reaches the GMSC, CFU active Campinas (019) Rio do Janeiro (021) HLR Sub X 019 9165 4321 Registered: RJ CFU: 019 3233 3333 (ii) SRI, resp (CFU) (i) SRI MSC/VLR Long distance carrier Coverage Area GMSC POTS VMS Office: 019 3233 3333

  5. 019 9165 4321 Signaling Traffic Call Forwarding, National Roaming - 2 of 3Standard way and “trombone”effect, CFNRC active Campinas (019) Rio do Janeiro (021) HLR Sub X 019 9165 4321 Registered: RJ CFNRC: 019 3233 3333 (ii) PRN (iii) PRN, resp (MSRN) Sub X 019 9165 4321 CFNRC: 019 3233 3333 (iv) SRI, resp (MSRN) (i) SRI MSC/VLR No Page Response Paging Long distance carrier Coverage Area GMSC POTS VMS Office: 019 3233 3333

  6. 019 9165 4321 Signaling Traffic Call Forwarding, National Roaming - 3 of 3Optimal Routing on Late Call Forwarding (OR on LCF) Campinas (019) Rio do Janeiro (021) HLR Sub X 019 9165 4321 Registered: RJ CFNRC: VMS PRN’ Sub X 019 9165 4321 Ericsson Proprietary RCH Ack.’ RCH’ MSC/VLR No Page Response, Busy or No Answer Paging Long distance carrier Coverage Area GMSC POTS VMS Office: 019 3233 3333

  7. 021 9165 4321 Signaling Traffic International RoamingTerminated call successful Brazil (55) Mexico (52) HLR Sub X 021 9165 4321 Registered: Mexico (ii) PRN (iii) PRN, resp (MSRN) (i) SRI (iv) SRI, resp (MSRN) MSC/VLR International Long distance carrier GMSC

  8. Roaming and Call ForwardingConcerns – 1 of 3 • OR on LCF depends on Ericsson nodes at both sides • Thus not applicable when different Core vendors are involved: • National Roaming (i.e. TA – Oi) • International Roaming • ANATEL Regulation 316, art. 29 and paragraph 6omentions explicitly that Voice Mail access shall not be considered as Call Forwarding. Possible solutions: • TA pays the Long Distance International leg of the call to VMS (absolutely not suggested) • Ericsson optional feature that blocks Call Forwarding services of the users roaming internationally.

  9. Roaming and Call ForwardingConcerns – 2 of 3 National Roaming – GSMCharging ?! OPERATOR Y OPERATOR X Overlapping Coverage

  10. Roaming and Call ForwardingConcerns – 3 of 3 OSB – Operator Specific BarringBlocking outside HLR • In the GSM standard OSB is not sent outside HPLMN • In Brazil TIM and Oi sends OSB also to each others and therefore also to TA! • Be aware of roaming subscribers and the use of OSB

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