1、 ETSI TR 1Digital cellular telecoUniversal Mobile TelStudy on V(3GPP TR 22.9TECHNICAL REPORT 122 903 V13.0.0 (2016communications system (Phaelecommunications System (LTE; Videotelephony teleservice .903 version 13.0.0 Release 1316-01) hase 2+); (UMTS); 13) ETSI ETSI TR 122 903 V13.0.0 (2016-01)13GPP
2、 TR 22.903 version 13.0.0 Release 13Reference RTR/TSGS-0122903vd00 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture
3、de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modif
4、ied without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Us
5、ers of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your com
6、ment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI.
7、The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are
8、 Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 122 903 V13.0.0 (20
9、16-01)23GPP TR 22.903 version 13.0.0 Release 13Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be f
10、ound in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR
11、Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This
12、Technical Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI d
13、eliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be i
14、nterpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 122 903 V13.0.0 (2016-01)33GPP TR 22.903 version 13.0.0 Release 13Contents In
15、tellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 Overview of CS videotelephony support in 3GPP specifications up to Release 6 . 6g34.1 Codec 6g34.2
16、 Charging . 6g34.3 Supplementary services 6g35 Requirements for videotelephony service 7g35.1 Charging . 7g35.2 Codec negotiation . 7g35.3 Security 8g35.4 Privacy 8g35.5 Supplementary service support . 8g35.6 Fall back to speech and in-call modification 9g35.7 Subscription 9g35.8 Handover 9g35.9 Eme
17、rgency calls support 9g35.10 Notifications to the User . 9g36 Backwards compatibility requirements 10g36.1 General description of functionalities that are supported in a videotelephony call to a pre Rel-7 videotelephony . 12g36.2 Interoperability with fixed videotelephony service 12g37 International
18、 calls and roaming 12g38 Conclusions 12g3Annex A: Existing requirements for videotelephony 14g3Annex B: Change history 15g3History 16g3ETSI ETSI TR 122 903 V13.0.0 (2016-01)43GPP TR 22.903 version 13.0.0 Release 13Foreword This Technical Report has been produced by the 3rdGeneration Partnership Proj
19、ect (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in ver
20、sion number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, correct
21、ions, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TR 122 903 V13.0.0 (2016-01)53GPP TR 22.903 version 13.0.0 Release 131 Scope The present document intends to analyse the introduction of additional functionalities for t
22、he videotelephony service in addition to what is provided in the 3GPP specifications up to Release 6. The functionalities will include but are not limited to codec negotiation, charging principles, supplementary services support. The approach followed is to evaluate how functionalities which are app
23、licable to existing teleservices can be replicated for videotelephony. The document will analyse how the new functionalities will impact the backwards compatibility with the existing CS multimedia service and will whether it is beneficial to create a videotelephony teleservice. 2 References The foll
24、owing documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not app
25、ly. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: “Vocabulary for 3GP
26、P specifications“. 2 3GPP TS 22.004: “General on Supplementary Services“. 3 3GPP TS 22 101: “Service Principles“. 4 3GPP TS 26.110: “Codec for circuit switched multimedia telephony service“. 5 3GPP TS 26.111: “Modification to H.324“. 6 3GPP TS 21.133: “3G security; Security threats and requirements“
27、. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply. Teleservice: Is a type of telecommunication service that provides the complete capability, including terminal equipment functions, for communication between
28、 users according to standardised protocols and transmission capabilities established by agreement between operators. Videotelephony: a instance of bidirectional multimedia communications between two parties where a speech component and a video component are transmitted and received. 3.2 Abbreviation
29、s For the purposes of the present document, the following abbreviations apply: VT Video Telephony UE User EquipmentFurther abbreviations are given in 3GPP TR 21.905 1. ETSI ETSI TR 122 903 V13.0.0 (2016-01)63GPP TR 22.903 version 13.0.0 Release 134 Overview of CS videotelephony support in 3GPP speci
30、fications up to Release 6 The CS Multimedia telephony is a Bearer Service, which is using the basic bearer service BS30 in the Core Network. On the air interface the BS30 is mapped to the Radio Access Bearer (RAB) using the traffic class Conversational with 64kbps CS in UL and DL direction. 4.1 Code
31、c ITU-T has specified that Recommendation H.324 should be used for video telephony in circuit switched connection. The 3GPP-variant of H.324 is named 3G-324M and the corresponding 3GPP specification is the 4 TS 26.110 “ Codec for circuit switched multimedia telephony service“ and 5 TS 26.111 “ Modif
32、ication to H.324“. 3G-324M terminals provide real-time video, audio, or data, in any combination over 3GPP circuit-switched radio networks. 4.2 Charging The RAB and the corresponding BS30 is not only for video telephony, data transfer is also possible. The user is able to select via terminal, depend
33、ing on terminal capabilities, which service they prefer, but the CN may not be able to distinguish between video telephony and data transfer unless the UE provides such indication. This also applies to changes during call set-up and in-call modification of the requested service. That means the curre
34、nt charging architecture may not be able to support e.g. two different pricing models for video telephony and data transfer. 4.3 Supplementary services The BS30 is a general synchronous bearer service with support of supplementary services. 2 TS 22.004 includes an overview of the supplementary servi
35、ces which are supported and which are not supported by the BS30 bearer as shown in the table below: ETSI ETSI TR 122 903 V13.0.0 (2016-01)73GPP TR 22.903 version 13.0.0 Release 13Supplementary Service Support by BS30 eMLPP enhanced Multi-Level Precedence and Pre-emption Yes CD Call Deflection Yes CL
36、IP Calling Line Identification Presentation Yes CLIR Calling Line Identification Restriction Yes COLP Connected Line Identification Presentation Yes COLR Connected Line Identification Restriction Yes CFU Call Forwarding Unconditional Yes CFB Call Forwarding on Mobile Subscriber Busy Yes CFNRy Call F
37、orwarding on No Reply Yes CFNRc Call Forwarding on Mobile Subscriber Not Reachable Yes CW Call Waiting Yes HOLD Call Hold No MPTY Multi Party Service No CUG Closed User Group Yes AoCI Advice of Charge (Information) Yes AoCC Advice of Charge (Charging) Yes UUS User-to-user signalling Yes BAOC Barring
38、 of All Outgoing Calls Yes BOIC Barring of Outgoing International Calls Yes BOIC-exHC Barring of Outgoing International Calls except those directed to the Home PLMN Country Yes BIC Barring of All Incoming Calls Yes BIC-Roam Barring of Incoming Calls when Roaming Outside the Home PLMN Country Yes ECT
39、 Explicit Call Transfer No CCBS Completion of calls to busy subscribers Yes SPNP Support of Private Numbering Plan Yes CNAP Calling Name Presentation No MSP Multiple Subscriber Profiles Yes MC Multicall Yes 5 Requirements for videotelephony service 5.1 Charging It should be possible for the network
40、to identify when a videotelephony is established so that accurate charging can be realised. All the events related to the videotelephony call such as modifications of the service type (e.g. speech call to videotelephony call modification, fall back to speech), modification of the codecs and so on sh
41、ould be recorded. 5.2 Codec negotiation It should be possible for terminals to perform codec negotiation during videotelephony call set up. This should result in reduced call set up time for videotelephony calls and may allow new and more efficient video codecs to be introduced ETSI ETSI TR 122 903
42、V13.0.0 (2016-01)83GPP TR 22.903 version 13.0.0 Release 13easily within mobile networks. This should be realised in the same fashion as speech call where the calling terminal presents to the recipient a list of supported codecs alongside the preferred one. 5.3 Security The user shall be able to use
43、and access the VT service in a secure manner. It shall be possible to deny access to the VT service to unauthorized users. An authorization may be based on the identity of the originating and/or destination user/device. The “Security Threats and Requirements“ specified in 6 shall not be compromised.
44、 5.4 Privacy It shall be possible to prevent exchange of user“s identity during call setup (e.g., by using CLIR/COLR). In addition, to protect user privacy it shall be possible to: - enable/disable video camera during the call. - accept a video call in audio mode only. - enable/disable audio during
45、the call (mute/unmute). A recipient shall be informed of the identity of the sender in case the sender has not restricted his identity to be transmitted. Optional support for ciphering user audio/video/data sessions should be considered. Note: this may be in conflict with lawful intercept if the enc
46、rypting in this case is user to user and the network is not able to recover the keys. 5.5 Supplementary service support At least the following supplementary services should be supported for videotelephony, which are already available for BS30: - eMLPP (enhanced Multi-Level Precedence and Pre-emption
47、) - CD (Call Delfection) - CLIP (Calling Line Identification Presentation) - CLIR (Calling Line Identification Restriction) - COLP (Connected Line Identification Presentation) - COLR (Connected Line Identification Restriction) - all the call forwarding types (CFU, CFB, CFNRy, CFNRc) - - CW (Call Wai
48、ting) - CUG (Closed User Group) - AoCI (Advice of Charge Information) and AoCC (Advice of Charge Charging) - UUS (User-to-user signalling) - all types of barring (BAOC, BOIC, BOIC -exHC, BIC, BIC-Roam) - CCBS (Call Completion to Busy Subscriber) - SPNP (Support of Private Numbering Plan) - MSP (Mult
49、iple Subscriber Profiles) ETSI ETSI TR 122 903 V13.0.0 (2016-01)93GPP TR 22.903 version 13.0.0 Release 13- MC (Multicall) Furthermore following supplementary services should be supported: - HOLD: - CNAP (calling name presentation) The support of multiparty is for further study. 5.6 Fall back to speech and in-call modification When the radio access network of the calling party or of the called party cannot support any longer the video media, or the interconnection between networks does not or no longer support videotelephony, the videotelephony
