ANSI TIA-41.336-E-2012 Mobile Application Part (MAP) - Voice Feature Scenarios Wireless Emergency Services《移动应用部分(MAP).音频特征场景 无线应急服务》.pdf

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22、AMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. REVISION HISTORYRevision Date RemarksX.S0004-336-E v1.0 January 2009 Initial publication.X.S0004-336-E v1.01234567891011121314151617181920212223242526272829303132333435363738

23、39404142434445464748495051525354555657585960336-1 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 listi

24、ng of operation 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 Eme

25、rgency ServicesThis section depicts the interactions between network entities in various situations related to anEmergency Services Call. These scenarios are for illustrative purposes only.2.1 Emergency Services Call Initiated During a Call After Intersystem HandoffThis scenario describes an Emergen

26、cy Services Call initiated during a call causing a three-waycall (with call processing modifications) following an intersystem handoff. This call will be setup from the Anchor MSC (if an intersystem handoff has occurred). This scenario depicts the 3-flash method along with the alternative 4-flash th

27、ree-way calling method. X.S0004-336-E v1.0Emergency Services123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960336-2a. A call is handed off from one MSC to another.b. Later and optionally, the user initiates a multi-way call. Without this o

28、ption, skip to Step-f.c. The Serving MSC forwards a FLASHREQ to the Anchor MSC, which determines that theMS has the Three-Way Calling feature active and is in a state able to invoke Three-WayCalling.d. The Anchor MSC places the non-controlling party on hold and may provide dialtone to theMS.Figure 1

29、 Emergency Services Call Initiated During a Call After Intersystem HandoffabcdefghijklmnopqrstuS/R MSC MS Serving System PSAP MSC call setup ES Routing Digits,Callback Number Put non-controlling party on hold ES Invocation FLASHREQ ES Digits, ESRD flashreq SHH FLASHREQ SEND flashreq Anchor System FL

30、ASHREQ FRT FRT PSAP answers call handoff FRT FRT no action FLASHREQ flashreq flashreq call setup ES Routing Digits,Callback Number PSAP answers call PSAP communicates with Emergency Services Caller SEND SEND Join 3 parties X.S0004-336-E v1.012345678910111213141516171819202122232425262728293031323334

31、3536373839404142434445464748495051525354555657585960336-3 Emergency Servicese. The Anchor MSC responds with a flashreq to the Serving MSC.f. The user initiates an Emergency Services Call.g. The Serving MSC forwards the ES invocation (e.g., flash digits 9-1-1) to the Anchor MSCin a FLASHREQ, containi

32、ng the following parameters set to specific values for thisscenario:.h. The Anchor MSC responds with a flashreq to the Serving MSC, containing thefollowing parameters set to specific values for this scenario:.i. The Anchor MSC, recognizing that an emergency call is being dialed, routes thecall to th

33、e appropriate Selective/Router (S/R), transmitting the followinginformation:j. The S/R forwards the call to the appropriate PSAP. This routing decision may take intoaccount the location of the MS, time-of-day, etc. Information passed is same as Step-i.Note: interfaces between S/R, PSAP and other eme

34、rgency services network elements areoutside the scope of this standard and are shown for illustrative purposes only.k. The PSAP answers by connecting to the Emergency Services Caller and returning answersupervision to the S/R.Parameters Usage TypeDigits (Dialed) These are the digits dialed by the su

35、bscriber accompanying the flash. These digits are used by the Anchor MSC to determine if the flash event represents an attempt to place an emergency call.RESRD EmergencyServicesRoutingDigits. A unique identifier of a specific base station, cell site or sector.If the Anchor MSC determines that an eme

36、rgency call is being placed, the Anchor MSC uses the ESRD to supply information that will cause PSTN routing to terminate at the appropriate ESNE.RParameters Usage TypeSHH SpecialHandling. Included if the Anchor MSC has determined that the call is an emergency call. The Serving MSC may use this info

37、rmation to provide Emergency Call Reconnect if radio contact with the MS is lost.OInofrmation Usage TypeES Routing Digits Emergency Services Routing Digits. A unique identifier of a specific base station, cell site or sector. The parameter carrying this information should be encoded as per the proto

38、col used to route the call.Information may also be included that will cause PSTN routing to terminate at the appro-priate ESNE. This number need not be a dialable number. For example, the office code of 911 could be used (e.g., 403-911-1234) to allow routing without the consumption of directory numb

39、ers.RCallback Number The Directory Number used to call back the caller.RX.S0004-336-E v1.0Emergency Services123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960336-4l. The S/R forwards the PSAPs answer supervision signal to the Anchor MSC. m

40、. The PSAPs agent communicates with the Emergency Services Caller.n. The user presses SEND again.o. The Serving MSC forwards a FLASHREQ to the Anchor MSC.p. The Anchor MSC bridges the trunk to the MS, the trunk to the S/R and the trunk to the heldparty to allow a three-way conversation.q. The Anchor

41、 MSC responds with a flashreq to the Serving MSC.r. The user presses SEND again.s. The Serving MSC forwards a FLASHREQ to the Anchor MSC.t. The Anchor MSC takes no action to avoid disconnecting the PSAP from the call.u. The Anchor MSC responds with a flashreq to the Serving MSC.X.S0004-336-E v1.0123

42、456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960336-5 Emergency Services2.2 Emergency Call Reconnect After Intersystem HandoffThis scenario describes a reconnect to the PSAP after loss of radio contact to the MS during anEmergency Services

43、Call.a. An MS user initiates as Emergency Services Call (e.g., dials 9-1-1).b. An emergency call is setup (using any of the previous scenarios).c. An intersystem handoff is initiated through the FACDIR2. It contains the SHH parameterto indicate that an emergency call is being handed off. Note that t

44、he SHH parameter is alsorequired in the HANDBACK2 and HANDTHIRD2 messages to support all inter-MSChandoff scenarios.d. The Serving MSC acknowledges with a facdir2.e. The Serving MSC reports the arrival of the MS on the new channel with an MSONCH.f. The MS disconnects due to an abnormal condition (e.

45、g., loss of radio synchronization).g. The Serving MSC, based on the SHH indicator received from the Anchor MSC at Step-c,determines that emergency reconnect should be provided. It may provide an in-bandwarning tone to the PSAP (e.g., low tone).h. The Serving MSC attempts to reconnect the MS (e.g., b

46、y paging).i. If the MS is reconnected, the warning tone is removed by the Serving MSC. If the MS wasunable to be reconnected, the PSAP trunk could be connected to a recorded announcementor a distinct tone (e.g., reorder).Figure 2 Emergency Call Reconnect After Intersystem Handoff abcdefghiS/R MSC MS

47、 Serving System PSAP MSC ES Invocation FACDIR2 SHH warning tone Anchor System MSONCH Emergency Services Call Established HOT remove tone facdir2 loss of radio contact reconnect X.S0004-336-E v1.0Emergency Services123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960336-6