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22、AL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. REVISION HISTORYRevision Date RemarksX.S0004-328-E v1.0 April 2008 Initial publication.X.S0004-328-E v1.012345678910111213141516171819202122232425262728293031323334353637383940414
23、2434445464748495051525354555657585960328-1 INTRODUCTION1 INTRODUCTIONUnless otherwise noted, the scenarios in this section 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 op
24、eration 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 Mobile Acce
25、ss HuntingThis section depicts the interactions between network entities in various situations related toautomatic roaming and Mobile Access Hunting (MAH). These scenarios are for illustrativepurposes only.2.1 MAH Membership Activation or De-ActivationThe information flows required for the activatio
26、n or de-activation of membership in themembers default or specified MAH group by an authorized MS are described in Part 311Section 2.1.2.2 MAH Ordering Change RequestThe information flows required for a request to change the members order in its default orspecified MAH group, by an authorized MS, ar
27、e described in Part 311 Section 2.1.2.3 MAH InvocationThis scenario describes the invocation of MAH. The MAH group is comprised of threemembers: one member is a PSTN DN, MAH-DN1; the other two members are MSs, served bythe same HLR and currently served by the same MSC. These two MSs will be referred
28、 to asMIN1 and MIN2 throughout this part.X.S0004-328-E v1.0Mobile Access Hunting123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960328-2a. A call origination and the dialed MS address digits (i.e., directory number) are receivedby the Origi
29、nating MSC.b. The Originating MSC sends a LOCREQ to the MSs HLR and includes the BillingIDand Digits (Dialed) parameters.Figure 1 MAH InvocationabcdefghijklmnopqrstuvwxyMSC VLR HLR MSC Serving System LRT Call is not completedstart call progress treatment routreq TLDN1 call origination Originating Sy
30、stem LOCREQ BILLID, DGTSDIAL locreq GRPINFO, NATIME, REDIND, TERMLIST, TERMTRIG call setup to MAH-DN1 release call to MAH-DN1 TRANUMREQ BILLID, GRPINFO, PILOT, REDREASON, TRANSCAP ROUTREQ MIN1, LegInfo1 ROUTREQ MIN1, LegInfo1 routreq TLDN1 tranumreq GRPINFO, NATIME, REDIND, TERMLIST, TERMTRIG Call i
31、s not completedROUTREQ MIN2, LegInfo2 ROUTREQ MIN2, LegInfo2 routreq TLDN2 routreq TLDN2 tranumreq GRPINFO, NATIME, REDIND, TERMLIST, TERMTRIG timeout MAHT RRT RRT TTNRT MAHT TLDNAT MAHT call setup to TLDN2 call answered byTLDN2 TTNRT RRT RRT TRANUMREQ BILLID, GRPINFO, PILOT, REDREASON, TRANSCAP rel
32、ease call to TLDN1 call setup to TLDN1 X.S0004-328-E v1.0123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960328-3 Mobile Access Huntingc. The HLR recognizes the called number as an MAH Pilot DN. The HLR sends alocreq to the Originating MSC,
33、 containing the first MAH group members routinginformation in the form of the TerminationList parameter, along with an indication ofthe reason for extending the incoming call (i.e., for MAH) in theDMH_RedirectionIndicator parameter. d. On receipt of the locreq, the Originating MSC may start call pro
34、gress treatment tothe calling party, if it has not already done so.e. The Originating MSC provides call treatment as indicated in the locreq. In this case,the treatment is to attempt to establish a call to the first DN in the MAH group,MAHDN1. For each call attempt, the Originating MSC monitors call
35、 progress; basedon this information, it applies appropriate call progress treatment to the calling party.f. The call to MAH-DN1 is not completed due to busy, no answer time-out or othercauses.g. The Originating MSC releases the call to MAH-DN1.h. Based on the instructions in the TerminationTriggers
36、parameter received in Step-c, theOriginating MSC sends a TRANUMREQ to the HLR, containing the BillingIDassociated with the original MAH call (step b) and the RedirectionReason parameter.Additional Parameters Usage TypeGRPINFO Information associated with the MAH Pilot DN. ONATIME Indication of how lo
37、ng, in seconds, the Origi-nating MSC should wait before applying noanswer treatment. Include to override Origi-nating MSC default.OTERMTRIG Indicates active termination trigger points formembers not having TerminationTriggersinside the TerminationList.OAdditional Parameters Usage TypeBILLID May be u
38、sed by HLR to relate the transfer request to the original MAH call invocation.RPILOT May be used by the HLR to relate the transfer request to the original MAH invocation.RGRPINFO May be used by HLR for further processing of the MAH call. Include if available.OTRANSCAP Indicates the Originating MSCs
39、transaction capability at the current time. (Allow routing information.)OX.S0004-328-E v1.0Mobile Access Hunting123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960328-4i. The HLR may use the BillingID or the PilotNumber and LegInformation t
40、o relate thetransfer request to the original MAH call. It sends a ROUTREQ to the VLR where theMS corresponding to the next entry in the MAH group list is registered, that of MIN1.j. The VLR forwards the ROUTREQ to the current Serving MSC.k. In reaction to the ROUTREQ, the Serving MSC checks its inte
41、rnal data structures anddetermines that the MS is currently idle. The Serving MSC allocates TLDN1 andreturns this information to the VLR in a routreq.l. The VLR sends the routreq to the HLR.m. The HLR sends a tranumreq to the Originating MSC, including TLDN1 in theTerminationList parameter, along wi
42、th an indication of the reason for extending theincoming call (i.e., for MAH) in the DMH_RedirectionIndicator parameter.n. The Originating MSC provides call treatment as indicated in the tranumreq. In thiscase, the treatment is to attempt to establish a call to TLDN1.o. The call to TLDN1 is not comp
43、leted due to busy, no answer time-out or other causes.p. The Originating MSC releases the call to TLDN1.q. Based on the instructions in the TerminationTriggers parameter received in Step-c, theOriginating MSC sends a TRANUMREQ to the HLR, containing the BillingIDassociated with the original MAH call
44、 (step b) and the RedirectionReason parameter.Additional Parameters Usage TypeLegInfo1: MAH parameters for call leg to MIN1:AlertCode Include for distinctive alerting of MS. OLegInformation Used for HLR identification of call leg to MIN1. Include at HLR option.OOneTimeFeature-Indicator Modify featur
45、e processing for the duration of this call leg.OTerminationTriggers Include if termination trigger points are active for call leg.OAdditional Parameters Usage TypeGRPINFO See description in Step-c. ONATIME See description in Step-c. OTERMTRIG See description in Step-c. RAdditional Parameters Usage T
46、ypeBILLID See description in Step-h. RPILOT See description in Step-h. RGRPINFO See description in Step-h. OTRANSCAP See description in Step-h. OX.S0004-328-E v1.0123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960328-5 Mobile Access Huntin
47、gr. The HLR may use the BillingID or PilotNumber and GroupInformation to relate thetransfer request to the original MAH call. It sends a ROUTREQ to the VLR where theMS corresponding to the next entry in the MAH group list is registered, that of MIN2.s. s. The VLR forwards the ROUTREQ to the current
48、Serving MSC.t. In reaction to the ROUTREQ, the Serving MSC checks its internal data structures anddetermines that the MS is currently idle. The Serving MSC allocates TLDN2 andreturns this information to the VLR in a routreq.u. The VLR sends the routreq to the HLR.v. The HLR sends a tranumreq to the
49、Originating MSC, including TLDN2 in theTerminationList parameter, along with an indication of the reason for extending theincoming call (i.e., for MAH) in the DMH_RedirectionIndicator parameter.w. The Originating MSC provides call treatment as indicated in the tranumreq. case,the treatment is to attempt to establish a call to TLDN2.x. The party at TLDN2 answers. The Originating MSC connects the calling party atTLDN2.y. On MAHT timer time-out, the HLR concludes MAH processing.Additional Parameters Usage TypeLegInfo2: MAH parameters for call leg
