CAN CSA-ISO IEC 15049-2001 Information Technology - Telecommunications and Information Exchange between Systems - Private Integrated Services Network - Specification Functional Modl.pdf

1、National Standard of CanadaCAN/CSA-ISO/IEC 15049-01(ISO/IEC 15049:1997)International Standard ISO/IEC 15049:1997 (first edition, 1997-05-15), has been adopted withoutmodification as CSA Standard CAN/CSA-ISO/IEC 15049-01, which has been approved as a National Standardof Canada by the Standards Counci

2、l of Canada.ISBN 1-55324-333-1 March 2001G35G48G49G48G55G48G51G46G48 G51G58G50G45G48G55G2cG36G32G12G2cG28G26 G14G18G13G17G1cG1d G14G1cG1cG1aGbG28GcThe Canadian Standards Association, which The Standards Council of Canada is theoperates under the name CSA International coordinating body of the Nation

3、al Standards system, (CSA), under whose auspices this National Standard a federation of independent, autonomoushas been produced, was chartered in 1919 and organizations working towards the furtheraccredited by the Standards Council of Canada to the development and improvement of voluntaryNational S

4、tandards system in 1973. It is a not-for-profit, standardization in the national interest.nonstatutory, voluntary membership association The principal objects of the Council are to foster engaged in standards development and certification and promote voluntary standardization as a means activities.

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6、ational trade, and furthering internationalorganizations, and governmental agencies. The cooperation in the field of standards.standards are used widely by industry and commerce A National Standard of Canada is a standard whichand often adopted by municipal, provincial, and federal has been approved

7、 by the Standards Council ofgovernments in their regulations, particularly in the Canada and one which reflects a reasonablefields of health, safety, building and construction, and agreement among the views of a number of capablethe environment. individuals whose collective interests provide to theI

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13、standards are subject In addition to its head office and laboratory complex to periodic review; therefore, users are cautioned in Toronto, CSA has regional branch offices in major to obtain the latest edition from the organizationcentres across Canada and inspection and testing preparing the standar

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15、e an open and 270 Albert Street, Suite 200effective forum for activities facilitating the exchange of Ottawa, Ontario, K1P 6N7goods and services through the use of standards, Canadacertification and related services to meet national andinternational needs.For further information on CSA services, wri

16、te toCSA International178 Rexdale BoulevardToronto, Ontario, M9W 1R3CanadaAlthough the intended primary application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-m

17、ark of Canadian Standards AssociationCAN/CSA-ISO/IEC 15049-01 Information technology System and software integrity levelsMarch 2001 CSA/1CAN/CSA-ISO/IEC 15049-01Information technology Systemand software integrity levelsCSA PrefaceStandards development within the Information Technology sector is harm

18、onized with internationalstandards development. Through the CSA Technical Committee on Information Technology (TCIT),Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onInformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the

19、ISO memberbody for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of theInternational Telecommunication Union (ITU), Canada participates in the International Telegraph andTelephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA

20、 TCIT under the jurisdiction of the StrategicSteering Committee on Information Technology and deemed acceptable for use in Canada. (A committeemembership list is available on request from the CSA Project Manager.) From time to time, ISO/IEC maypublish addenda, corrigenda, etc. The CSA TCIT will revi

21、ew these documents for approval and publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update or contact a CSA Salesrepresentative. This Standard has been formally approved, without modification, by these Committeesand has been approved as a National Standard of

22、Canada by the Standards Council of Canada.March 2001 CSA International 2001All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permissionof the publisher. ISO/IEC material is reprinted with permission. Inquiries regarding this National Standard

23、 of Canadashould be addressed to CSA International, 178 Rexdale Boulevard, Toronto, Ontario, M9W 1R3.INTERNATIONAL STANDARD ISOAEC 15049 First edition 1997-05 15 Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification

24、, functional model and information flows - Advice of charge supplementary services Technologies de Iinforma tion - Tkkcommunica tions et khange dinforma tion entre systkmes - R6seau privk - total charges with value “0” or Tree of charge” if at the time of the transfer the PISN decides that user B or

25、 user C is to be charged for the part of the call prior to transfer also. User A shall not be allowed to invoke AOC-E only for the call resulting from transfer. After transfer AOC-E may be invoked for user B (or C) either automatically or on request from the user. If user C has not answered at the t

26、ime of transfer, it shall not be possible to invoke SS-AOC-E until after user C has answered. If the user for which SS-AOC-E is invoked is to be charged for the call resulting from transfer, AOC-E information at the end of the call to user B (or C) may contain charges incurred prior to transfer. 8.3

27、.14 Completion of CaIIs to Busy Subscribers (CCBS) If SS-AOC-E is invoked for a call and the call encounters a busy called user, then SS-AOC-E shah apply to a call resulting from the use of SS-CCBS. 8.3.15 Completion of Calls on No Reply (CCNR) If SS-AOC-E is invoked for a call and the call fails to

28、 be answered, then SS-AOC-E shall apply to a call resulting from the use of SS-CCNR. 8.3.16 Do Not Disturb (DND) No interaction. 8.3.17 Do Not Disturb Override (DNDO) No interaction. 8.3.18 Path replacement (ANF-PR) The invocation and operation of ANF-PR shall not affect the delivery of ABC-E inform

29、ation to the served user. 8.3.19 Recall (RR) After recall, SS-AOC-E may still be active for user A. If not still active, SS-AOC-E may be invoked for user A either automatically or on request from the user. 8.4 Interworking considerations 8.4.1 Interworking with public ISDN For calls to a public ISDN

30、, the PISN shall relate the final charges delivered to the served user of AOC with the charges that the public ISDN will account the PISN for. 8.4.2 Interworking with PSTN For calls to a PSTN, the PISN shall relate the final charges delivered to the served user of AOC with the charges that the PSTN

31、will account the PISN for. 14 OISO/IEC ISO/IEC 15049: 1997 (E) 8.5 Overall SDL Figure 3 contains the dynamic description of SS-AK-E using the Specification and Description Language (SDL) defined in CCITT Rec. 2.100 (1988). The SDL process represents the behaviour of the network in providing SS-AOC-E

32、 to a served user. Input signals from the left and output signals to the left represent primitives from and to the calling user. Input signals from the right represent inputs from the basic call process or from an internal process. 15 1s0AEc 15049:1997 (E) OISOnEC with SS-AOC-E rejection i fort - re

33、quests from FE3 the appropriate type(s) of charging information and receives the response; - receives from FE3 any charging information generated; - performs any necessary conversions and FEl, as required by the user; calculations on the received information indicates the charging information to - i

34、nduces the delay of basic call release, if necessary, in order to receive final charging information; - rejects unauthorized SS-AOC requests from FEl. 9.1.2.3 Charge component generator functional entity, FE3 This functional entity: - receives from FE2 requests for charging information and sends a p

35、ositive or a negative response to FEZ, as appropriate; - obtains from the collocated accounting entity charge components and sends the information to FE2 in the form used within the PISN; - induces the release of the basic call after having received from FE2 a request for final charges and having ob

36、tained the final charge component; - if required, sends a final charge component to the transferring user either at call transfer time or when a transferred call is released; or to the diverting user when a diverted call is released. Note - The diverting user or the transferring user does not partic

37、ipate in the call and therefore receives the final charges in a call independent manner. 17 ISO/IEC 15049: 1997 (E) OISO/IEC 9.1.3 Relationship of functional model to basic call functional model An example of relationship between the FEs for SS-AOC and FEs for the basic call is shown in figure 5. 84

38、-0148-A Figure 5 - Example relationship between model for SS-AOC and Basic Call 9.2 Information flows 9.2.1 Definition of information flows In the tables listing the elements in informations flows, the column headed “Request ” indicates which of these elements are mandatory (M) and which are optiona

39、l (0) in a request/indication information flow and the column. headed “Confim“ (confirmed information flows only) indicates which of these elements are mandatory (M) and which are optional (0) in a . response/confirmation information flow. 9.2.1.1 ragREQUEST raREQUEST is an unconfirmed information f

40、low across ra from FE1 to FE2 which is used to request the provision of charging information. Note - ra-REQUEST applies only in the case where AOC is requested on a per call basis. Table 1 lists the elements within the ra-REQUEST information flow. 9.2.1.2 rr Element REQUEST for AOC Table 1 - Content

41、 of ranREQUEST AOC-E -INFORM1 ra-INFORM1 is an unconfirmed information flow across ra from FE2 to FE1 which is used to convey charge rate inrormation (AOC-S) at the start of the call when it has been requested at the call establishment time, or following a request placed later, and whenever the rate

42、 changes. Table 2 lists the elements within the ra-INFORM1 information flow. 18 OISOLIEC ISO/IEC 15049: 1997 (E) Table 2 - Content of ra-INFORMd lement ype of charging information Type of charging information = Charging rate Jharged item lharging rate f Charging rate = Duration rate: Type of chargin

43、g Currency identifier Currency amount Multiplier Length of time unit Scale (time) Granularity Scale (granularity) If Charging rate = Specific rate: Rate type Allowed value Charging rate, or Information not available. Basic communication, and/or Call attempt, and/or Call setup, and/or User-to-user in

44、formation, and/or Operation of supplementary services. Duration rate, or Specific rate, or Volume rate. Step function charging, or Continuous charging. Yharacter string integer ),OOl, or ),Ol, or 1,1, or l,O, or 10, or 100, or 1000. Integer 0,Ol s, or 0,l s, or 1,O s, or 10 s, or 1 min, or 1 hour or

45、 24 hours. Integer 0,Ol s, or 0,l s, or 1,0 s, or 10 s, or 1 min, or 1 hour, or 24 hours. Free of charge, or Free of charge from the beginning, or Flat rate (currency units) or, Special charging code, or Not available. Zequest Note M M M M M M M M 0 0 M 1 2 2 19 ISO/IEC 15049:1997 (E) OISOIIEC Table

46、 2 (continued) If Rate type = Flat rate (currency units): Currency identifier Currency amount Multiplier (currency) Character string Integer 0,001, or O,Ol, or O,l, or l,O, or 10, or 100, or 1000. M M M If Rate type = Special charging code: N If Charging rate = Volume rate: Currency identifier Curre

47、ncy amount Multiplier (currency) Integer ( 1- 10) Character string Integer 0,001, or O,Ol, or O,l, or l,O, or 10, or 100, or 1000. M M M M Type of volume unit Octet, or Segment, or Message. M I Note 1 - Each of these items will be accompanied by appropriate values for the remaining elements in this

48、table. Note 2 - These elements shall be included if the granularity is known. Note 3 - Free of charge shall be used if the associated charged item is or becomes free of charge from the reception of this charging rate information. Free of charge from the beginning shall be reserved for an associated charged item with the value “Basic communication ” and shall be used if the call is or becomes free of charge from the beginning of the call. 9.2.1.3 ra-INFORM2 ra-INFORM2 is an unconfirmed information flow across ra from FE2 to FE1 which is used to provi