1、 ETSI TS 122 226 V14.0.0 (2017-03) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Global Text Telephony (GTT); Stage 1 (3GPP TS 22.226 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 122 226 V14.0.0 (2017-03)13GPP
2、TS 22.226 version 14.0.0 Release 14Reference RTS/TSGS-0122226ve00 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 d
3、e 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 modifi
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9、4.0.0 (2017-03)23GPP TS 22.226 version 14.0.0 Release 14Intellectual 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
10、 can be found 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
11、ETSI IPR 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. Forew
12、ord 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 deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be fou
13、nd 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 interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the
14、expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 122 226 V14.0.0 (2017-03)33GPP TS 22.226 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3In
15、troduction 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 High level Requirements 7g35 General Requirements 8g35.1 Text conversation host environments . 8g35.2 Text conversation management 8g35.3 Registration of text conversation capabi
16、lities . 8g35.4 Session control . 8g35.5 Invoking text conversation . 8g35.6 Text conversation handling during calls . 9g35.7 Alerting 9g35.8 Addressing 9g35.9 Roaming . 10g36 Security and reliability . 10g37 Charging . 10g38 External Interfaces 10g38.1 External interfaces in the terminal 10g38.2 Ex
17、ternal interfaces to other networks . 10g39 Interworking . 11g310 Additional services . 11g310.1 Emergency services 11g310.2 Relay services . 12g311 Network implementation considerations 12g3Annex A (informative): Background 13g3A.1 Total Conversation . 13g3A.2 Interworking . 13g3A.3 Additional serv
18、ices . 14g3Annex B (informative): Initial requirements . 15g3B.1 Transmission Performance . 15g3B.2 Man Machine Interface (MMI) 16g3B.3 Compatibility 16g3B.4 Complexity of Implementation and Roll Out . 17g3B.5 Referenced consumer requirements 18g3Annex C (informative): Change history . 19g3History 2
19、0g3ETSI ETSI TS 122 226 V14.0.0 (2017-03)43GPP TS 22.226 version 14.0.0 Release 14Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change followin
20、g 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 version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG
21、 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, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the documen
22、t. Introduction Real time, character by character text conversation is a component that increases usability in a conversational session. Global Text Telephony is a feature that adds the capability to use a text conversation component in a session. It is called Global Text or GTT here. Interworking w
23、ith corresponding features in other networks is an important part of Global Text. Specifically, the different kinds of PSTN text telephone systems supported by the international text telephone modem standard ITU-T V.18 are included in the modes for interworking. One important reason to offer the Glo
24、bal Text feature is to enable emergency service access to people who are depending on a written dialogue. A more elaborated background is found in Annex A, and requirements in Annex B. Figure 1 gives an overview of the user environment for Global Text. ETSI ETSI TS 122 226 V14.0.0 (2017-03)53GPP TS
25、22.226 version 14.0.0 Release 14Cellular Network Cellular Network Fixed Network IP network GTTFE Fixed textphone user IP textphone or multimedia user Fixed multimedia user Mobile, text capable terminals Figure 1. Global Text service environment 1 Scope This Technical Specification defines the stage
26、one description of the Global Text Telephone Feature, GTT Stage one is the set of requirements which shall be supported for the provision of the real-time text conversation feature, seen primarily from the subscribers and service providers points of view. This TS includes information applicable to n
27、etwork operators, service providers, terminal and network manufacturers. This TS contains the core requirements for the Global Text Telephony feature, which are sufficient to provide a complete feature to incorporate in conversational services. This TS defines the requirements for GTT to be understo
28、od as a framework to enable real-time transmission of text, for the purpose of a text based or text supported conversation between users. Text may be transported alone or in combination with other media in the session, especially video and voice. Thus the GTT enables text conversation to be included
29、 in any mobile conversational service. Interworking with existing text telephony in PSTN as well as emerging forms of standardised text conversation in all networks is within the scope of this document. Interoperation with Multimedia Messaging Services is also within scope of this feature. Note: The
30、 Global Text Telephony feature may be enhanced due to e.g. operators or regulators requirements, however such additional functionality shall not compromise conformance to the core requirements documented in this TS. 2 References The following documents contain provisions which, through reference in
31、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. ETSI ETSI TS 122 226 V14.0.0 (2017-03)63GPP TS 22.226 version 14.0.0 Release 14- For a specific reference, subsequent
32、revisions do not apply. - 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 TS 22.10
33、1: “Service Principles“. 2 ETSI ETR 333; Text Telephony; User requirements and Recommendations 3 ITU-T H.248 Annex F Facsimile, Text conversation and call discrimination packages (2000) 4 ITU-T Recommendation T.140 (1998) Text conversation protocol for multimedia application. With amendment 1 (2000)
34、. 5 ITU-T Recommendation F.700 (2000) Framework recommendation for audiovisual/multimedia services. 6 ITU-T Recommendation V.18 (2000) Operational and interworking requirements for DCE:s operating in the text telephone mode. 7 3GPP TS 22.140: “Multimedia Messaging Service; Stage 1“ 8 3GPP TS 23.140:
35、 “Multimedia Messaging Service; Functional description; Stage 2“ 9 IETF RFC 2793. (2000) RTP Payload for text conversation. 10 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 3 Definitions and abbreviations 3.1 Definitions Total Conversation: A service offering standardised simultaneous text,
36、video and voice conversation or a subset thereof. Host environment : The session environment where the text component is added. E.g. Circuit switched voice, IP Multimedia etc. Text Conversation: A real time conversation in text with transmission character by character as entered. Further definitions
37、 are listed in 3GPP TR 21.905 10. 3.2 Abbreviations For the purposes of this document the following abbreviations apply: EDT European Deaf Telephone GTT Global Text Telephony; The feature that adds real time text conversation to any 3GPP conversational environment GTTFE Global Text Telephony Feature
38、 Environment The network components and functions forming GTT TTY Here used as the term for the text telephone type dominating in USA. DTMF Here used as a term for the text telephone type used in Holland, using DTMF tones. VCO Voice Carry Over: Alternating (or parallel) sending of Speech and receivi
39、ng Text HCO Hear Carry Over: Alternating (or parallel) receiving Speech and transmission of Text FCC Federal Communications Commission (of United States of America) PER Printable character Error Rate MMI Man Machine Interface SIM Subscriber Identification Module ETSI ETSI TS 122 226 V14.0.0 (2017-03
40、)73GPP TS 22.226 version 14.0.0 Release 14ITU International Telecom Standardisation Union GSM Global System for Mobile communication 3GPP Third Generation Partnership Project CS Circuit Switched IP Internet ProtocolsFurther abbreviations are listed in TR 21.905 10. 4 High level Requirements The foll
41、owing list gives the high level requirements of the GTT. These are requirements which are independent of the users perception of the feature:- - Service definition Global Text shall provide a real time conversational text feature. A general definition is found in Recommendation ITU-T F.7005. - Globa
42、l Text Telephony host environments A standardised method for Global Text Telephony shall at least be specified for each host environment in the mobile networks that can carry voice. - Standards compliant and forward compatible text conversation Global Text Telephone mechanisms shall provide the capa
43、bility to support current and evolving text telephony and text conversation features by re-using existing standards as far as possible and proposing extensions (as necessary) to existing standards (i.e. the global text telephony feature shall support the evolution of Total Conversation technologies
44、in all networks). - Consistent text conversation Regardless of the selected host environment, the far end terminal, the interworking facilities involved, GTT shall be capable of providing a consistent way of handling the conversation. - Global Text Telephone access Within the capabilities of network
45、s and terminals, the user shall be provided consistent access to the GTT regardless of the access point. For example: the user shall be capable of accessing the text conversation features through a number of different access points, including networks based on 3GPP specifications, access through ded
46、icated multimedia terminals, and access through combinations of mobile phones combined with text user interface devices. - Interoperability Global Text Telephony shall support interoperability with existing and emerging text telephone systems and text conversation features. Global Text Telephony sha
47、ll support a minimum set of environments where text conversation is supported to ensure full interoperability between different terminals and networks. - Emergency calls The implementation of Global Text Telephony shall enable a user to make emergency calls to, and receive calls from, an emergency c
48、all centre via a text telephony device used in conjunction with GTT enabled user equipment. ETSI ETSI TS 122 226 V14.0.0 (2017-03)83GPP TS 22.226 version 14.0.0 Release 145 General Requirements Network operators have many differing requirements, and GTT shall be supported in the network in a manner
49、which allows network operators to consider different configurations depending on their network and commercial requirements. Thus, an identified set of functionalities and protocols shall be standardised to ensure interoperability across networks and terminals to support GTT. The following general requirements shall be supported. 5.1 Text conversation host environments The protocol environments for text conversation shall be the same as the ones used for other multimedia conversation calls and voice calls. The selected environment for a
