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3GPP2 IMS Supplementary Services Transfer to 3GPP Common IMS

3GPP2 IMS Supplementary Services Transfer to 3GPP Common IMS. Gap Analysis and Actions Proposed. 3GPP-3GPP2 Common IMS Workshop 24-25 January 2008 Puerto Vallarta, Mexico Tdoc CIMS-080010. Presentation Overview. Survey of Relevant Specifications for Gap Analysis

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3GPP2 IMS Supplementary Services Transfer to 3GPP Common IMS

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  1. 3GPP2 IMS Supplementary Services Transfer to 3GPP Common IMS Gap Analysis and Actions Proposed 3GPP-3GPP2 Common IMS Workshop 24-25 January 2008 Puerto Vallarta, Mexico Tdoc CIMS-080010

  2. Presentation Overview • Survey of Relevant Specifications for Gap Analysis • Summary of 3GPP2 X.P0055 Services Reviewed • Gap Analysis • Summary of Actions Proposed by 3GPP2

  3. Relevant Specifications • 3GPP2 Specifications (Source) • S.P0125 – VoIP Supplementary Services Stage 1 • X.P0055 – VoIP Supplementary Services Stage 2/3 (information flows and signaling requirements) • 3GPP Specifications(Target) • TS 22.173 – IMS Multimedia Telephony Service and Supplementary Services Stage 1 • TS 24.173 – IMS Multimedia Telephony Comm. Service and Supplementary Services Stage 3 • TS 22.182 – Customized Alerting Tones Requirements

  4. Services Reviewed From 3GPP2 X.P0055 • Call Hold • Call Waiting • Call Transfer • Call Forwarding • Identity Presentation/Restriction Services (CIP/CIR/TIP/TIR) • Three-Way Conferencing • Message Waiting Indication • DTMF Support • User Provisioning • Customized Ring Back Tones (CRBT) • Voice Mail Deposit (VMD)/Voice Mail Retrieval (VMR) • Flexible Alerting • Outbound Call Restriction (OCR)/Inbound Call Restriction (ICR)/Anonymous Call Rejection (ACR) • Address Resolution Services (Directory Assistance/Short Code Dialing/Abbreviated Dialing)

  5. Call Hold • Requirements: Same • Stage 3: Aligned, except for a minor difference in the case of “Call Hold with Announcement”: • In 3GPP2 X.P0055, within the response to the SIP INVITE, the SDP “a=” attribute is allowed to be set by the AS either to value “recvonly” or “inactive”. • In TS 24.173, within the response to the SIP INVITE, the SDP “a=” attribute is set by the AS to value “recvonly” only. • No modifications are proposed at this time.

  6. Call Waiting • Requirements: Aligned • Stage 3: Work in 3GPP is not yet concluded. TISPAN R2 work is also ongoing (focusing on interworking with legacy terminals). • In 3GPP2 X.P0055, there is no service logic specified at the AS for this service. • No modifications are proposed at this time.

  7. Call Transfer • Requirements: Same • Stage 3: Aligned for end-to-end REFER, but… • 3GPP2 X.P0055 has a 3pcc (third party call control) implementation variant which is not included in 3GPP 24.173. • Associated CRs are available for the workshop. • Note: TISPAN R2 work in progress includes “REFER Interworking”.

  8. Call Forwarding • Requirements: • Call forwarding unconditional – MMTel Communication Diversion (CDIV) has richer requirements but essence the same • Call forwarding on busy – 3GPP has richer requirements but essence the same • Call forwarding no answer – combination of 3GPP CFNoReply & CFNotLoggedIn; same • 3GPP has additional CDIV flavours: • Not Logged In (CFNL), • Communication Deflection (CD), • Not Reachable (CFNRc) • CDIV supports a served user notification capability that 3GPP2 does not specify. • Stage 3: Aligned

  9. Identity Presentation/Restriction Services • Requirements: Same (OIP/OIR in 3GPP are known as CIP/CIR in 3GPP2) • Stage 3: 3GPP and 3GPP2 are aligned

  10. Three-Way Conferencing (3WC) • 3GPP2’s 3WC is covered by CONF in 3GPP/MMTel • Requirements: Aligned, although CONF places no limitation on the number of conference participants or how the conference is created. • Stage 3: Aligned, with the exceptions mentioned below: • X.P0055 has a 3pcc implementation variant whereas 24.173 does not • X.P0055 assumes that in order to invite another user to join a conference, the conference creating UE REFERs the other end point[s] to the conference server whereas 24.173 illustrates (by way of signalling flow) only the case in which the conference creating UE REFERs the conference server to the other end point[s]. • CRs are available for the workshop.

  11. Message Waiting Indication • Requirements: Same for 3GPP and 3GPP2. • Stage 3: Aligned. • 3GPP functionality distributed across 3GPP TS 24.173 and 23.204 • 3GPP2 functionality within 3GPP2 X.P0055

  12. DTMF Support • 3GPP does not call this capability out as an MMTel service since it leverages a standard SDP capability (“telephone-event” payload type). • No modifications are proposed at this time for DTMF Support.

  13. User Provisioning • In 3GPP user configuration is done using the Ut (XCAP) interface. • 3GPP2 does not specify user configuration via the Ut interface. • 3GPP2 defines only a SIP-based user provisioning (configuration) mechanism (one in which the Request-URI: header in the SIP INVITE carries an operator-specific feature or ‘star’ code). • Neither 3GPP nor TISPAN specifies such a mechanism. • CRs are available for the workshop.

  14. Customized Ring Back Tones • 3GPP2 has Customized Ring Back Tones (CRBT) service; 3GPP has Customized Alerting Tones (CAT) service. • Requirements for CRBT and CAT: • CRBT is a terminating network only service. • CAT also includes an originating network component. • Status of CAT: • Requirements stable (described in TS 22.182) • TR started for stage 2/3 work in CS domain. No work on IMS CAT yet. • Associated CRs are available for the workshop.

  15. Voice Mail Deposit/Retrieval • Voice Mail Deposit • is covered by Call Forwarding on Busy in 3GPP • there is no need for 3GPP to have separate feature • Voice Mail Retrieval • is an AS-based address resolution service, which leverages IMS services concepts. • No modifications are proposed at this time.

  16. Flexible Alerting • This feature is not defined by 3GPP or TISPAN. • Feature is defined in X.P0055. • Feature is an Application Server-based group termination service. • Associated CRs are available for the workshop.

  17. Outbound/Inbound Call Restriction • In 3GPP/TISPAN these services come under the heading of Communication Barring (CB). • Requirements: Aligned, although in 3GPP the barring rule set is standardised whereas in 3GPP2 it is not. • Stage 3: Aligned • No modifications are proposed at this time.

  18. Number/Address Resolution Features • In this class, 3GPP2 specifies the Directory Assistance, Short Code Dialling and Abbreviated Dialling services. These services are Application Server-based number/address resolution features. • 3GPP does not call these out explicitly as services since they only leverage IMS services concepts (in particular, functionality described in “Support of numbers in non-international format in IMS” clause in TS 23.228). • No modifications are proposed at this time.

  19. Summary of Actions Proposed (1 of 3)

  20. Summary of Actions Proposed (2 of 3)

  21. Summary of Actions Proposed (3 of 3)

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