1、 ETSI TS 122 226 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Global Text Telephony (GTT); Stage 1 (3GPP TS 22.226 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 122 226 V15.0.0 (2018-07)13GPP
2、TS 22.226 version 15.0.0 Release 15Reference RTS/TSGS-0122226vf00 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
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9、 122 226 V15.0.0 (2018-07)23GPP TS 22.226 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ET
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14、GPP). 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 f
15、ound 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 th
16、e expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 122 226 V15.0.0 (2018-07)33GPP TS 22.226 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3
17、Introduction 4g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 High level Requirements 7g35 General Requirements 8g35.1 Text conversation host environments . 8g35.2 Text conversation management 8g35.3 Registration of text conversation capa
18、bilities . 9g35.4 Session control . 9g35.5 Invoking text conversation . 9g35.6 Text conversation handling during calls . 9g35.7 Alerting 10g35.8 Addressing 10g35.9 Roaming . 10g36 Security and reliability . 10g37 Charging . 10g38 External Interfaces 10g38.1 External interfaces in the terminal 10g38.
19、2 External interfaces to other networks . 11g39 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
20、services . 14g3Annex B (informative): Initial requirements . 15g3B.1 Transmission Performance . 15g3B.2 Man Machine Interface (MMI) 15g3B.3 Compatibility 16g3B.4 Complexity of Implementation and Roll Out . 17g3B.5 Referenced consumer requirements 18g3Annex C (informative): Change history . 19g3Histo
21、ry 20g3ETSI ETSI TS 122 226 V15.0.0 (2018-07)43GPP TS 22.226 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following f
22、ormal 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 fo
23、r 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 document.
24、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 with
25、 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 Global
26、 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 V15.0.0 (2018-07)53GPP TS 22.
27、226 version 15.0.0 Release 15Cellular 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 ETSI ETSI TS 122 226 V15.0.0 (2018-07)63GPP TS 22.226 vers
28、ion 15.0.0 Release 151 Scope This Technical Specification defines the stage 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 se
29、rvice providers points of view. This TS includes information applicable to network 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 conv
30、ersational services. This TS defines the requirements for GTT to be understood 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, espec
31、ially video and voice. Thus the GTT enables text conversation to be included 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 M
32、ultimedia Messaging Services is also within scope of this feature. Note: The 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 Refere
33、nces The following 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 rev
34、isions 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 22.101:
35、“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). 5
36、 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: “M
37、ultimedia 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“. ETSI ETSI TS 122 226 V15.0.0 (2018-07)73GPP TS 22.226 version 15.0.0 Release 153 Definitions and abbreviations 3.1 Definit
38、ions Total Conversation: A service offering standardised simultaneous text, 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 t
39、ext with transmission character by character as entered. Further definitions 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 conversatio
40、n to any 3GPP conversational environment GTTFE Global Text Telephony Feature 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. V
41、CO Voice Carry Over: Alternating (or parallel) sending of Speech and receiving 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 Interfac
42、e SIM Subscriber Identification Module ITU 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 followi
43、ng 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. - Global T
44、ext 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 capabil
45、ity 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 in
46、all networks). ETSI ETSI TS 122 226 V15.0.0 (2018-07)83GPP TS 22.226 version 15.0.0 Release 15- 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 con
47、versation. - Global Text Telephone access Within the capabilities of networks 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
48、 points, including networks based on 3GPP specifications, access through dedicated 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
49、 telephone systems and text conversation features. Global Text Telephony shall 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 call centre via a text telephony device used in conjunction with GTT enabled user equipment. 5 General Requirements Network operators have many differing requirements,
