1、3404583 0067637 T ETSI/TC SMG Release date: February 1992 e Released by : ETSI/PT 12 RELEASE NOTE Recommendation GSM 02.05 Simultaneous and Alternate use of Services Previously distributed version : 3.0.2 (Updated Release 1/90) New Released version February 92 : 3.0.2 (Release 92, Phase 1) I I 1. Re
2、ason for changes No changes since the previously distributed version. m 3404583 00bbLB 925 m ETSI-GSM Tech n ica I Specification GSM 02.05 Version 3.0.2 UDC: 621.396.21 Key words: European Digital Cellular Telecommunications System, Global System for Mobile Communications (GSM) European digital cell
3、ular telecommunication system (phase 1); Simultaneous and Alternate use of Services ETSI European Telecommunications Standards Institute ETSI Secretariat: B.P.152 . F - 06561 Valbonne Cedex . France TP. + 33 92 94 42 O0 TF. + 33 93 65 47 16 Tx. 47 00 40 F Copyright European Telecommunications Standa
4、rds Institute 1992. All rights reserved. No part may be reproduced or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. GSM-MOU Released by: Release Date
5、: Recommendation: Title: 3404583 00bbL 8bL GSM 02.05 - version 3.0.2 - 1 ETSI PT12 February 1992 GSM 02.05 SIMULTANEOUS AND ALTERNATE USE OF SERVICES List of Contents: O. Scope 1. Basic requirements 1.1. Simultaneous and alternate use of basic telecommunication services 1.1.1. Principle 1.1.2. Simul
6、taneous use 1.1.3. Alternate use within a communication 1.2. Use of Supplementary Services in conjunction with Basic Services 2. Evolution possibilities Original language: English Number of paqes: 3 Maintenance Responsibility: MoU-SERG m 3404583 0069620 583 m GSM 02.05 - version 3.0.2 - 2 O. SCOPE T
7、he purpose of this recommendation is to define the required simultaneous and alternate use of (i) basic telecommunication services and (ii) supplementary services. In this definition the basic requirements for the first implementation and the requirements of an evolution are distinguished. 1. BASIC
8、REQUIREMENTS 1.1 Simultaneous and alternate use of basic telecommunication services 1.1.1 PrinciDle As a general rule simultaneous use of basic telecommunication services must be in line with the access capability of the mobile station as specified in GSM 04.03. 1.1.2 Simultaneous use It is not poss
9、ible that at a given time the user can use more than one of the Basic telecommunication services according to Rec. GSM 02.02 and GSM 02.03. As an exception of this rule the short message service (point to point) can be used with one other Basic telecommunication service. NOTE: The user may select th
10、e Basic telecommunication service for every communication, which he establishes and releases independently. 1.1-3 Alternate use within a communication There are GSM PLMN basic telecommunication services comprising alternate use of different bearer capabilities within a communication (see Rec. GSM 02
11、.02 and GSM 02.03). When these services are requested, the type of service is indicated in the call request or the call offering together with the initial mode of usage, During the call, changing from one mode of usage to the other is possible. NOTE : When the speech followed by data is requested, t
12、he type of service is indicated in the call request or the call offering, The initial mode of usage is speech. During the call, a change to the data mode is possible but no return to the speech mode is allowed, 1.2. Use of Supplementary Services in conjunction with Basic Services Since every supplem
13、entary service enhances a basic telecommunication service, every supplementary service alone can be used simultaneously with a Basic telecommunication service. = 3404583 0069623 4LT GSM 02.05 - version 3.0.2 - 3 t * Recommendation GSM 02.04 defines the possible interactions between supplementary services. 2 EVOLUTION POSSIBILITIES The following possibility should be further studied at an appropriate date: Simultaneous use of several telecommunication services.
