1、3400855 0078699 2i.19 E7W GSM 02.93 December 1995 Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-O102930 ICs: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS Digital cellular telecommunication
2、s system (Phase 2+); Completion of Calls to Busy Subscriber (CCBS) Service description, Stage 1 (GSM 02.93) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbon
3、ne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariata etsi.fr Tel.: +33 92 94 42 O0 - Fax: +33 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in al
4、l media. Q European Telecommunications Standards Institute 1995. All rights reserved. Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Ed
5、iting and Committee Support Dept.“ at the address shown on the title page. Page 3 GSM 02.93 Version 5.0.0: December 1995 Contents Foreword . 5 Scope 7 Normative references 7 Definitions and abbreviations 7 3.1 Definitions 7 3.2 Abbreviations . 9 Description 9 4.1 Applicability to telecommunications
6、services . 9 Normal procedures with successful outcome . 9 Provision 9 5.1 Withdrawal . 9 5.2 5.3 Registration 9 5.4 Erasure 9 5.5 Activation . 10 5.6 Deactivation . 11 5.7 Invocation and operation 11 5.8 Interrogation . 12 Exceptional procedures or unsuccessful outcome 12 6.1 Registration 12 6.2 Er
7、asure 12 6.3 Activation . 12 6.4 Deactivation . 13 6.5 Invocation and operation 13 6.5.1 Exceptional situation at destination Bs side: . 14 6.5.2 Exceptional situation at subscriber As side: . 15 6.5.3 Exceptional situations in the network 15 Interaction with other supplementary services 16 7.1 7.2
8、7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.1 1 7.12 7.13 7.1 4 7.15 7.1 6 7.1 7 7.18 7.19 7.20 Calling line identification presentation 16 Calling line identification restriction 16 Connected line identification presentation . 16 Connected line identification restriction . 16 Call Forwarding Unconditional (
9、CFU) 16 Call Forwarding on mobile subscriber Busy (CFB) 16 Call Forwarding on No Reply (CFNRy) 17 Call Forwarding on mobile subscriber Not Reachable (CFNRc) . 17 Call waiting . 17 Call hold . 17 Multiparty services . 17 Closed user group 18 Advice of charge services 18 Barring of All Outgoing Calls
10、(BAOC) 18 Barring of Outgoing International Calls (BOIC) 18 Country (BOIC-exHC) 18 Barring of All Incoming Calls (BAIC) 18 Explicit call transfer 19 Completion of calls to busy subscriber 19 Barring of Outgoing International Calls except those directed to the Home PLMN Barring of Incoming Calls when
11、 roaming outside the home PLMN country (BIC-Roam) 18 - ETSI GSfl*02=93 95 m 3400855 0078702 bb3 H Page 4 GSM 02.93 Version 5.0.0: December 1995 8 Intercommunication considerations 19 9 Mobility aspects 19 Annex A (normative): Cross Phase compatibility . 20 A.l Activation of CCBS . 20 A.2 CCBS Recall
12、 . 20 A.3 Interrogation 20 A.4 Deactivation 20 A.5 Roaming into networks or registering in network entities not supporting CCBS 20 A.5.1 Subscriber A may register in a non-supporting network or network entity 20 A.5.2 Destination B may register in a non-supporting network entity . 21 History . 22 Pa
13、ge 5 GSM 02.93 Version 5.0.0: December 1995 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced by the Special Mobile Group (SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI). This GTS specifies the stage 1 d
14、escription of Completion of Calls to Busy Subscriber (CCBS) from the subscribers and users points of view; in particular: - - - within the digital cellular telecommunications system (Phase 2/Phase 2+). the procedures for normal operation with successful outcome; the action to be taken in exceptional
15、 circumstances; the interaction with other GSM supplementary services. This GTS is a TC-SMG approved GSM technical specification version 5, which contains GSM Phase 2+ enhancementdfeatures. GTS are produced by TC-SMG to enable the GSM Phase 2+ specifications to become publicly available, prior to su
16、bmission for the formal ETSI standards approval procedure to become European Telecommunications Standards (ETS). This ensures the earliest possible access to GSM Phase 2+ specifications for all Manufacturers, Network operators and implementors of the Global System for Mobile communications. The cont
17、ents of this GTS are subject to continuing work within TC-SMG and may change following formal TC-SMG approval. Should TC-SMG modify the contents of this GTS it will then be republished by ETSI with an identifying change of release date and an increase in version number as follows: Version 5.x.y wher
18、e: y the third digit is incremented when editorial only changes have been incorporated in the specif ication; x the second digit is incremented for all other types of changes, .e. technical enhancements, corrections, updates, etc. Reference is made within this TS to GSM-TSs (note). NOTE: TC-SMG has
19、produced documents which give the technical specifications for the implementation of the digital cellular telecommunications system. Historically, these documents have been identified as GSM Technical Specifications (GSM-TSs). These TSs may have subsequently become I-ETSs (Phase l), or ETSs/ETSI Tec
20、hnical Reports (ETRs) (Phase 2). TC-SMG has also produced ETSI GSM TSs which give the technical specifications for the implementation of Phase 2+ enhancements of the digital cellular telecommunications system. These version 5.x.x GSM Technical Specifications may be referred to as GTSs. ETSI GSM*02*9
21、3 95 = 3YOO55 0078704 436 Page 6 GSM 02.93 Version 5.0.0: December 1995 Blank page ETSI GSM*O2=93 95 3400855 0078705 372 Page 7 GSM 02.93 Version 5.0.0: December 1995 1 Scope This Global System for Mobile communications Technical Specification (GTS) specifies the stage 1 description of Completion of
22、 Calls to Busy Subscriber (CCBS) from the subscribers and users points of view; in particular: - - - the procedures for normal operation with successful outcome; the action to be taken in exceptional circumstances; the interaction with other GSM supplementary services; This GTS does not deal with th
23、e Man-Machine Interface (MMI) requirements, but makes reference to the appropriate GSM specifications. The charging principles applied to CCBS are outside of the scope of this GTS. This GTS is applicable to the digital cellular telecommunication system Global System for Mobile communications (GSM).
24、Any interactions with other networks not dealt with in clause 9 are outside the scope of this GTS. 2 Normative references This GTS incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publi
25、cations are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this GTS only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. i31 GSM O1 .O4 (ETR 100
26、): “European digital cellular telecommunication system (Phase 2); Abbreviations and acronyms“. GSM 02.30 (ETS 300 51 1): “European digital cellular telecommunication system (Phase 2); Man-Machine Interface (MMI) of the Mobile Station (MS)“. GSM 09.02 (ETS 300 599): “European digital cellular telecom
27、munication system (Phase 2); Mobile Application Part (MAP) specification“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of this GTS, the following definitions apply: CCBS supplementary service: Is a service which enables a calling subscriber A, encountering a NDUB destination 8,
28、to have the call completed when the busy destination B becomes idle, without having to make a new call attempt. CCBS busy on the A side: Is caused by the following condition: - while the CCBS recall timer T4 or the CCBS notification timer T10 is running or until the CCBS call is completed or the CCB
29、S call fails. CCBS busy on the B side: Is caused by the following conditions: - while the idle guard timer (T8) is running; - while there is CCBS recall pending (.e. while the CCBS recall timer T9 is running). Subscriber A and Destination B is indicated as idle if there are no active calls, no calls
30、 on hold and no call waiting for the subscribers. Page 8 GSM 02.93 Version 5.0.0: December 1995 Subscriber A and Destination B is indicated as not reachable if one of the conditions defined in TS GSM 09.02 (ETS 300 599)3 apply (e.g. IMSI detach, no paging response, no location information in HLR). C
31、CBS call: A call Set-up generated by the network from subscriber A to destination B resulting from subscriber As acceptance of a CCBS recall. CCBS recall: An indication informing subscriber A that: (a) the network is now ready to initiate a call to destination B; and, (b) the network will automatica
32、lly set up a call between subscriber A and destination B if subscriber A accepts the CCBS recall before the CCBS recall timer expires. CCBS request: An activation of the CCBS supplementary service which is held in a queue pending the correct conditions for the CCBS supplementary service to be comple
33、ted. destination B: The entity addressed in the original call set up. subscriber A: The subscriber that originated the call and requested the CCBS supplementary service and is uniquely identifiable for CCBS recall. suspended CCBS request: A CCBS request which cannot be served even if destination B i
34、s idle, because subscriber A is not idle and ignores the CCBS recall, CCBS busy, not reachable or some supplementary service interaction exists. resumed CCBS request: A CCBS request which was suspended before and has become not suspended as a result of subscriber A becoming idle, not CCBS busy, reac
35、hable again or the supplementary service interaction ends. Timers At The Originating Side (A): CCBS retention timer (Tl): this timer specifies the amount of time that the network retains the call information when the call encounters busy. The value shall be greater than 15 seconds. The upper limit o
36、f the CCBS retention timer is a network option. CCBS service duration timer (T3): the maximum time the CCBS request will be active within the network. The value of this period is a network option, in the range of 15 to 45 minutes. CCBS recall timer (T4): the maximum time the network will wait for a
37、subscriber A response to a CCBS recall when subscriber A is idle. The value of this timer is in the range 20 to 30 seconds. CCBS notification timer (110): the maximum time the network will wait for a subscriber A response to a CCBS recall when subscriber A is not idle and not CCBS busy. The value of
38、 the timer is in the range 20 to 30 seconds. CCBS resume timer (Til): the timer started as soon as a suspended CCBS request is resumed, making sure only one CCBS request is becoming resumed at a time. Duration of the timer shall allow a CCBS recall resulting from the destination side CCBS queue bein
39、g processed. The value of the timer is in the range 20 to 25 seconds. Timers At The Terminating Side (6): CCBS service duration timer (T7): is the timer which specifies the maximum length of time the CCBS request will be held within the network. The value of this period is a network option shall be
40、greater than 45 minutes. Destination B idle guard timer (T8): the time the network will wait after destination B has become idle before initiating a “CCBS recall“ to subscriber A. The value of this timer is in the range O to 15 seconds. NOTE: This timer enables destination B to initiate a call befor
41、e any notification is given to subscriber A that destination B has become idle and prevents destination B to receive incoming calls. Page 9 GSM 02.93 Version 5.0.0: December 1995 CCBS recall B timer (T9): is the timer, which supervises the CCBS recall establishment on the B- side. The value shall be
42、 in the range of 40 to 55 seconds. NOTE: This timer prevents destination B from receiving other incoming calls than from subscriber A. 3.2 Abbreviations For the purposes of this GTS the following abbreviations apply: CCBS NDUB ISDN Completion of Calls to Busy Subscriber Network Determined User Busy
43、Integrated Services Digital Network Additional GSM related abbreviations may be found in GSM O1 .O4 (ETR 100)1 4 Description When subscriber A encounters a Network Determined User Busy (NDUB) destination B, subscriber A can request the CCBS supplementary service. The network will then monitor the wa
44、nted destination B for becoming idle. When the wanted destination B becomes idle, then the network will wait a short time in order to allow destination B to make an outgoing call. If destination B does not make any outgoing call within this time, then the network shall automatically recall subscribe
45、r A. When subscriber A accepts the CCBS recall, within a defined time, then the network will automatically generate a CCBS call to destination B. CCBS has to be supported by the originating, as well as by the terminating network. 4.1 Applicability to telecommunications services The CCBS supplementar
46、y service is applicable to all circuit switched telecommunications services, except emergency calls. The CCBS supplementary service is not applicable to dedicated PAD access and dedicated packet access. 5 Normal procedures with successf ul outcome 5.1 Provision The CCBS supplementary service shall b
47、e provided to subscriber A after prior arrangement with the service provider. This supplementary service is provisioned for all Basic Services (BS) subscribed to and to which it is applicable, .e. not provisioned to any subset of these BSs. 5.2 Withdrawal The CCBS supplementary service shall be with
48、drawn at the customers request or for administrative reasons. 5.3 Registration Not applicable. 5.4 Erasure Not applicable. ETSI GSM*02.93 95 3400855 0078708 081 Page 10 GSM 02.93 Version 5.0.0: December 1995 5.5 Activation CCBS shall be activated by the mobile subscriber on a per-call basis by a con
49、trol procedure as described in GSM 02.30 (ETS 300 51 1)2. When subscriber A encounters a NDUB destination B, the network shall retain the call information for a defined period (CCBS retention timer Tl), during which time subscriber A can activate the CCBS supplementary service, or until subscriber A terminates the call. The network A may retain the call information start T 1 and inform subscriber A that CCBS is possible when the following set of conditions apply: - - - subscriber A has CCBS provisioned; the call failure reason is “busy“, .e. cause va
