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22、LEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. REVISION HISTORYRevision Date RemarksX.S0004-327-E v1.0 April 2008 Initial publication.X.S0004-327-E v1.0123456789101112131415161718192021222324252627282930313233343536373839404142434
23、445464748495051525354555657585960327-1 INTRODUCTION1 INTRODUCTIONUnless otherwise noted, the scenarios in this part depict features operating individually; i.e.,feature interactions are not considered unless specifically noted.The scenarios in this part do not include a complete listing of operation
24、 parameters, either in thefigures or in the accompanying text descriptions. Parameters are included where they aredeemed necessary to improve the understanding of the scenario. For a complete description ofthe parameters associated with each operation, refer to Parts 540 and 550.2 FLEXIBLE ALERTINGT
25、his section depicts the interactions between network entities in various situations related toautomatic roaming and Flexible Alerting (FA). These scenarios are for illustrative purposesonly.2.1 FA Membership Activation or De-ActivationThe information flows required for the activation or de-activatio
26、n of membership in the mem-bers default or specified FA group by an authorized MS are described in Part 311 Section 2.1.X.S0004-327-E v1.0FLEXIBLE ALERTING123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960327-22.2 FA InvocationThis scenari
27、o describes an invocation of FA. The FA group is comprised of three members: onemember is a PSTN DN, FA-DN1; the other two members are MSs, served by the same HLR andcurrently served by the same MSC. These two MSs will be referred to as MIN1 and MIN2throughout this part. Figure 1 FA Invocationabcdef
28、ghijklmnopqrMSC VLR HLR MSC call origination Serving System Originating System routreq TLDN1 LOCREQ DGTSDIAL, TRANSCAPcall setup start call progress treatment release call leg to TLDN2 call leg setup to TLDN1 call leg answered by TLDN1 ROUTREQ MIN1, LegInfo1 routreq TLDN1 ROUTREQ MIN2, LegInfo2 rout
29、req TLDN2 call leg setup to TLDN2 release call leg to FA-DN1call leg setup to FA-DN1ROUTREQ MIN1, LegInfo1 locreq GRPINFO, NATIME, TERMLIST, REDIND, TERMTRIG ROUTREQ MIN2, LegInfo2 LRT RRT RRT RRT RRT TLDNAT TLDNAT routreq TLDN2 X.S0004-327-E v1.012345678910111213141516171819202122232425262728293031
30、3233343536373839404142434445464748495051525354555657585960327-3 FLEXIBLE ALERTINGa. A call origination and the dialed MS address digits (i.e., directory number) are receivedby the Originating MSC.b. The Originating MSC sends a LOCREQ to the HLR associated with the MS; thisassociation is made through
31、 the dialed MS address digits (which may not be the MIN).The Originating MSC may optionally include the TransactionCapability parameter tospecify the appropriate termination handling.c-f. The HLR recognizes the called number as an FA Pilot DN and that, based on the received TransactionCapability par
32、ameter, the Originating MSC is capable of supporting an FA call. In this case, the two MSs in the FA group are registered in the same system; therefore, two ROUTREQs are sent to the Serving VLR and the VLR forwards the ROUTREQs to the Serving MSC.g-j. In reaction to each ROUTREQ, the Serving MSC che
33、cks its internal data structures and determines that the MS is currently idle, then allocates a TLDN and returns this infor-mation to the VLR in a routreq. The VLR sends each routreq to the HLR.k. When all routreqs are received by the HLR, it returns a locreq to the OriginatingMSC. The locreq includ
34、es multiple-termination routing information in the form ofthe TerminationList parameter, along with an indication of the reason for extending theincoming call (i.e., for FA) in the DMH_RedirectionIndicator parameter.Additional Parameters Usage TypeLegInfo1: FA parameters for call leg to MIN1:AlertCo
35、de Include for distinctive alerting of MIN1. OLegInformation Used for HLR identification of call leg to MIN1. Include at HLR option.OOneTimeFeature-IndicatorModify feature processing for the duration of this call leg.OTerminationTriggers Include if termination trigger points are active for call leg
36、to MIN1.OLegInfo2: FA parameters for call leg to MIN2:AlertCode Include for distinctive alerting of MIN2. OLegInformation Used for HLR identification of call leg to MIN2. Include at HLR option.OOneTimeFeature-IndicatorModify feature processing for the duration of this call leg.OTerminationTriggers I
37、nclude if termination trigger points are active for call leg to MIN2.OAdditional Parameters Usage TypeTERMLIST List of FA group members identification infor-mation, from first member to last.RGRPINFO Information associated with the FA Pilot DN. ONATIME Indication of how long, in seconds, the Origi-n
38、ating MSC should wait before applying no answer treatment. Include to override Origi-nating MSC default.OTERMTRIG Indicates active termination trigger points for members not having TerminationTriggers inside the TerminationList.OX.S0004-327-E v1.0FLEXIBLE ALERTING123456789101112131415161718192021222
39、324252627282930313233343536373839404142434445464748495051525354555657585960327-4l. On receipt of the locreq, the Originating MSC may start call progress treatment tothe calling party, if it has not already done so.m. The Originating MSC provides call treatment as indicated in the locreq. In this cas
40、e,the treatment is to attempt to establish, in parallel, calls to the FA-DN1.n. .to the TLDN1, and .o. .to the TLDN2. In general, these calls may require outgoing trunks or be internal tothe Originating MSC. For each call attempt, the Originating MSC monitors callprogress; based on this information,
41、 it applies appropriate call progress treatment to thecalling party.p. The party at TLDN1 answers. The Originating MSC connects the calling party to theparty at TLDN1.q. The Originating MSC releases the call to TLDN2, and.r. The Originating MSC releases the call to FA-DN1.X.S0004-327-E v1.0123456789
42、101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960327-5 FLEXIBLE ALERTING2.3 FA Invocation with a Busy FA Group Member (Single-User Type)This scenario describes an invocation of FA where a member busy condition is encountered.The FA group is compri
43、sed as described in Section 2.2. The FA group is the single-user type(i.e., the FA group is considered busy when a member of the FA group is busy).a-f. Same as FA, Section 2.2, Steps a-f.g-h. In reaction to the ROUTREQ received in Step-d, the Serving MSC checks its internal data structures and deter
44、mines that the MS is currently idle, then allocates a TLDN and returns this information to the VLR in a routreq. The VLR sends the routreq to the HLR.i-j. In reaction to the ROUTREQ received in Step-f, the Serving MSC checks its internal data structures and determines that the MS is currently busy i
45、n another call. The status of the MS is returned to the VLR by the Serving MSC in the routreq. The VLR sends the routreq to the HLR.Figure 2 FA Invocation with a Busy FA Group Member (Single-User Type)abcdefghijklmMSC VLR HLR MSC call origination Serving System locreq ACCDEN=Busy Originating System
46、routreq TLDN1 LOCREQ DGTSDIAL, TRANSCAPbusy indication ROUTREQ MIN1, LegInfo1 routreq ACCDEN=Busy LRT TLDNAT RRT RRT RRT RRT ROUTREQ MIN1, LegInfo1 ROUTREQ MIN2, LegInfo2 routreq ACCDEN=Busy ROUTREQ MIN2, LegInfo2 routreq TLDN1 Timeout X.S0004-327-E v1.0FLEXIBLE ALERTING12345678910111213141516171819
47、2021222324252627282930313233343536373839404142434445464748495051525354555657585960327-6k. The HLR determines from the service profile that the FA group is a single-user type;therefore, the group is considered busy (i.e., since MIN2 is busy). The HLR returnsthe busy status to the Originating MSC in t
48、he locreq.l. The Originating MSC then returns a busy indication to the calling party.m. The Serving MSC detects that the TLDN Association Timer (TLDNAT) set for a MSexpires; therefore, it frees the TLDN for other use and removes the record associatedwith that TLDN.X.S0004-327-E v1.012345678910111213
49、1415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960327-7 FLEXIBLE ALERTING2.4 FA Invocation with a Busy FA Group Member(Multiple-User Type)This scenario describes an invocation of FA where a member busy condition is encountered.The FA group is comprised as described in Section 2.2. The FA group is the multiple-user type(i.e., the FA group is considered busy when all members of the FA group are busy). a-f. Same as FA, Section 2.2, Steps a-f.g-j. Same as FA, Section 2.3, Steps g-j.k. T
