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1、TIA/EIA TELECOMMUNICATIONS SYSTEMS BULLETIN Support for Pre-Paid TSBl24 OCTOBER 2000 TELECOMMUNICATIONS INDUSTRY ASSOCIATION /- The Telecommunications Indushy Association represents the communications sector of Elsctronit: Industrias- Alliance Copyright Telecommunications Industry Association Provid
2、ed by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- NOTICE TWEIA Engineering Standards and Publications are designed to serve the public interest through eli
3、minating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not i
4、n any respect preclude any member or nonmember of TWEIA rom manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TWEIA members, whether the standard is to be us
5、ed either domestically or internationally. Standards, Publications and Bulletins are adopted by EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TWEIA does not assume any liability to any patent owner, nor does it assume any obligation whatever t
6、o parties adopting the Standard, Publication, or Bulletin. Technical Bulletins are distinguished rom TWEIA Standards or Interim Standards, in that they contain a compilation of engineering data or information useful to the technical community, and represent approaches to good engineering practices t
7、hat are suggested by the formulating committee. This Bulletin is not intended to preclude or discourage other approaches that similarly represent good engineering practice, or that may be acceptable to, or have been accepted by, appropriate bodies. Parties who wish to bring other approaches to the a
8、ttention of the formulating committee to be considered for inclusion in future revisions of this Bulletin are encouraged to do so. It is the intention of the formulating committee to revise and update this Bulletin rom time to time as may be occasioned by changes in technology, industry practice, or
9、 government regulations, or for other appropriate reasons. (From Project No. 487 1, formulated under the cognizance of the TIA TR-45.2 Subcommittee on Wireless Intersystem Technology.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2000 Standards and Technology Department 2500 Wilson Boulevard
10、 Arlington, VA 2220 1 PRICE: Please refer to the current Catalog of ELECTRONIC INDUSTRIES ALLIANCE STANDARDS and ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-7179) International (303-397-7956) All rights reserved Printed in U.S.A. Copyright Telecommunicati
11、ons Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Telecommunications Industry Association Provided by IHS under li
12、cense with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- TSB124 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 a) 21 22 23 24 25 26 27 23 29 33 31 3 33 34 5 33 3 7 38 39 40 41 42
13、43 44 45 46 47 48 49 50 51 52 53 54 E6 56 5 7 58 59 60 1. Introduction 2. This Telecommunications Systems Bulletin (TSB) applies to PN-4287 (IS-826). It introduces a difference between IS-771 and PN-4287 with respect to MSC processing of the TerminationList parameter. Problem Statement The differenc
14、e between IS-771 and PN-4287 TerminationList parameter processing will result in different service treatments for subscribers roaming into a system providing a different treatment than the home system. The IS-771 procedures describe MSC actions upon receipt of specific parameters from service logic
15、programs (SLP). There is a difference between IS-771 procedures text and an SDL in the Chapter 6 annex. Based on the procedures, the parameters included in the response from the SLP provide these instructions. A received AccessDeniedReason parameter directs the MSC to stop further processing and to
16、provide final treatment. A received Digits (Dialed) parameter directs the MSC to analyze the received digits using the dialing plan in force. A received TerminationList parameter directs the MSC to “terminate”, or route, the call (PSTN Termination, Intersystem Termination, Local Termination). The ab
17、sence of the above parameters in the response from the SLP directs the MSC to continue call processing using the existing call information (e.g., dialed digits). The PN-4287 procedures describe the MSC actions upon receipt of these same parameters in a somewhat different manner. The parameters inclu
18、ded in the response from the SLP provide these instructions. A received AccessDeniedReason parameter directs the MSC to stop further processing and to provide final treatment. A received Digits (Dialed) parameter directs the MSC to analyze the received digits using the dialing plan in force. A recei
19、ved TerminationList parameter directs the MSC to retain the received routing information and to continue processing using the dialing plan in force. The MSC will include the current Digits (Dialed) value in subsequent service logic queries. The absence of the above parameters in the response from th
20、e SLP directs the MSC to continue call processing using the existing call information (e.g., dialed digits). 1 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reprod
21、uction or networking permitted without license from IHS -,-,- TSBl24 3. Service Provider Impact . . . . . . . I I ORREQ MIN, DGTSDIAL Service logic providers will be impacted by the difference described above. An SLP will return specific parameters to control subsequent MSC processing. When the MSC
22、does not act upon the receipt of the TerminationList parameter as expected, the subscribers services will have unexpected interactions. The following two scenarios describe trigger processing when a subscriber roams to a system providing a different TerminationList treatment than that expected by th
23、e SLP. In each scenario the subscriber has two triggers: All-Calls and InternationalLCall. The SLP at the All-Calls trigger returns specific parameters intending to control MSC processing, but the expected behavior does not occur. In this scenario, the subscribers home system acts on a received Term
24、inationList parameter by routing the call. The expected behavior is that the InternationalLCall trigger is not detected if the service behind the All-Calls trigger provides routing information. However, since the subscriber is roaming into a system which stores a received TerminationList parameter a
25、nd continues processing, both triggers will be detected regardless of what is returned from the All-Calls trigger. . .-*-.-.a b . . . . . . . IS-771 Home System L . . . . . PN-4287 Serving System I ORT c . . . . . . . . orreq TERMLIST d . . . . . . . ANLYZD MIN, DGTSDIAL e . . . . . . . anlyzd ACCDE
26、N Figure 1 IS-771 subscriber roaming into PN-4287 system a. The mobile subscriber makes a call. b. The Serving MSC detects the All-Calls trigger and sends an ORREQ to the corresponding SCP. Service logic determines the call should be allowed and provides routing information to the MSC in the Termina
27、tionList parameter included in the orreq. The Serving MSC detects the InternationalLCall trigger based on the original dialed digits being an international number, and sends an ANLY z D to the corresponding SCP. e. Service logic determines the call should be denied to an international number and ret
28、urns the AccessDeniedReason in the anly zd. Had the subscriber been at home, the call would have been delivered using the information provided by the first service. c. d 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 a) 21 22 23 24 25 26 27 23 29 33 31 3 33 34 5 33 3 7 38 39 40 41 42 43 44 45 46 47
29、 48 49 50 51 52 53 54 E6 56 5 7 58 59 60 2 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- TSB124
30、 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 a) 21 22 23 24 25 26 27 23 29 33 31 3 33 34 5 33 3 7 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 E6 56 5 7 58 59 60 In this scenario, the subscribers home system acts on a received TerminationList parameter by storing the value and continuing t
31、o process triggers. The expected behavior is that the service logic behind the InternationalLCall trigger determines final treatment, regardless of what is returned from the All-Calls trigger. However, since the subscriber is roaming into a system which routes a call upon receipt of a TerminationLis
32、t parameter, the TerminationList parameter received from the All-Calls trigger causes the MSC to quit trigger processing and route the call without detecting the InternationalCa11 trigger. PN-4287 Home System m F 1 . . . 43 -r 1 IS-771 Serving System 1 4. Figure 2 PN-4287 subscriber roaming into IS-
33、771 system a. b. The mobile subscriber makes a call. The Serving MSC detects the All-Calls trigger and sends an ORREQ to the corresponding SCP. Service logic determines the call should be allowed and provides routing information to the MSC in the TerminationList parameter included in the orreq. d Th
34、e Serving MSC sets up a call as instructed by the TerminationList parameter. Had the subscriber been at home, the call would have been denied by the service logic at the International-Call trigger. c. Action TR-45.2 is expected to address this problem during TZMEZA-41 -E integration. 3 Copyright Tel
35、ecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Telecommunications Industry Association Provided by
36、IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/
37、1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 20:08:38 MDTNo reproduction or networking permitted without license from IHS -,-,-