EAGLE Analyzed Information Features User's Guide

Feature Description

When an operator is moving (migrating) customers from one technology to another technology (such as CDMA to LTE), the ANSI41 AnalyzedInformation Query - no EPAP/ELAP (ANSI41 AIQ) feature provides the ability to indicate which calls are destined for a particular technology.

The Home MSC receives a call for its subscriber, and queries the HLR for call treatment instructions.
Calls that are marked in the HLR will have a termination trigger provided to the Home MSC.
- The HLR provides a termination trigger to the Home MSC.
- The Home MSC sends an AnalyzedInformation Query to the EAGLE.
- The EAGLE normally responds with an AnalyzedInformation Return Result message with routing information.
- Based on the response, the Home MSC continues with the traditional call set-up procedure.
If no termination trigger is provided, the Home MSC sends these calls directly to the newer technology.

ANSI41 AIQ is implemented as a local SCCP subsystem in the EAGLE. ANSI41 AIQ does not require connection to, or a Real Time Database (RTDB) from, an EPAP or ELAP. ANSI41 AIQ performs the following operations:

Process TCAP_Query_with_Permission AnalyzedInformation queries routed to the ANSI41 AIQ feature.
Respond with an AnalyzedInformation Return Result message, including the routing information in the “Routing Digits or Digits (Dialed)” parameter. Configuration options indicate which parameter to include and the format of the parameter in the response message.

AnalyzedInformation Message Flow

Figure 3-1 illustrates the EAGLE AnalyzedInformation message flow for the ANSI41 AIQ feature.

Figure 3-1 EAGLE AnalyzedInformation Message Flow

Figure 3-2 shows a more detailed message flow.

Figure 3-2 EAGLE AnalyzedInformation Message Flow Details

img/analyzedinfo_eagle_detail_msg_flow.jpg

The AIQ Local Subsystem

The AIQ local subsystem receives an incoming MSU, decodes the required data, and generates a response MSU based on decoded information and desired response format.

The AIQ local subsystem in the EAGLE processes AnalyzedInformation Query messages (ANSI MTP/SCCP and ITU MTP/SCCP with ANSI TCAP). SCCP UDT and non-segmented XUDT, Class 0 or Class 1 messages are supported. Segmented messages (SCCP or TCAP) are not supported. TCAP must be Query with Permission with Invoke component, and the OpCode must be AnalyzedInformation. The EAGLE responds with an AnalyzedInformation Return Result including provisioned routing information in the Routing Digits or Digits (Dialed) parameter.

Local subsystems in the EAGLE are maintainable entities for query and response that are used when the STP acts as an SCP. Every local SCCP subsystem includes generic SCCP subsystem capabilities. The following function descriptions provide information that is generic to every local subsystem, and indicate the information that is specific to the AIQ local subsystem:

Common EAGLE provisioning

Capability point codes (CPCs) can be defined for routing to local subsystems independently of the STP. For AIQ, the EAGLE supports ANSI, ITU-I, ITU-N, ITU-I Spare, and ITU-N Spare capability point code (CPC) types. ITU-N24 capability point codes are not supported. Capability point codes for the AIQ local subsystem can be configured only after the ANSI41 AIQ feature is enabled.

The AIQ local subsystem must have a mate subsystem and a concerned point code group assigned to it in the MAP table.The ANSI41 AIQ feature must be enabled before the AIQ local subsystem entry can be entered in the MAP table. The AIQ local subsystem can be configured in only Dominant or Solitary loadsharing mode (end nodes do not perform loadsharing).
Routing Indicator-based message handling

Messages for the AIQ local subsystem can arrive Rt-on-SSN or Rt-on-GT. All MSUs must contain either the EAGLE true or secondary point code (TSPC), or the AIQ capability point code (CPC), in the DPC field of the message.

Network Management

The EAGLE must reply to network management queries about the current state of the local subsystem. The response to each query type is based on the status of the local subsystem.

Table 3-1 Network Management Response

Message	Action when Local Subsystem is Online	Action when Local Subsystem is Offline
RSP (CPC)	TFA	No reply
RSR (CPC) (not supported for ITU networks)	TFA	TFP
RSP (TSPC)	TFA	TFA
RSR (TSPC)	TFA	TFA
SST	SSA	No reply
SRT (ANSI only; for ITU, UIM 1058: `SCCP rcvd inv SCMG - bad msg type` is generated)	SNR	No reply

Network Broadcast.
When the local subsystem changes state, network management messages are sent to the CSPC group.
- SNR/SBRs are sent in ANSI networks to the mate node.
- SSP/SSAs are sent in ANSI and ITU networks to all nodes in the CSPC group.
Controls and States

The AIQ local subsystem can be taken online and offline using the coordinated state change, or forced offline without using the coordinated state change, using the procedures in Provisioning the AIQ Local Subsystem.

When a command is entered to perform a coordinated state change, SCCP Management (SCMG) sends an SOR message to the mated subsystem and will start a T_coord timer (30 seconds). If SCMG receives an SOG message from the mated subsystem before the T_coord timer expires, SCMG broadcasts SSPs to the concerned point code group, sends SBR/SSP, and takes the subsystem offline. A UAM will be generated notifying that a particular local system is not available and indicating that the subsystem is PROHIBITED. If the SOG is not received before the T_coord timer expires, then the inhibit request is denied. A UIM will be generated indicating failure in inhibiting a particular local subsystem.

When a command is entered to take the subsystem offline without using a coordinated state change, the EAGLE just sends SBR/SSPs. A UAM will be generated notifying that a particular local subsystem is not available and indicating that the subsystem is PROHIBITED.

When a command is entered to take the local subsystem online (regardless of how the subsystem was taken offline), the EAGLE sends SNR/SSA. A UAM will be generated notifying that a particular local subsystem is available and indicating that the subsystem is ALLOWED.
When the EAGLE receives an SOR message from its mated subsystem, it will reply with an SOG message if both of the following conditions are met. If either of the conditions is not met, the EAGLE does not reply to the SOR message.
- The local subsystem is available.
- The total load on the local subsystem is less than 45% of its capacity.

SCMG Functions on LIM Cards

Table 3-2 shows a summary of actions on the LIM cards when the cards are unable to deliver MSUs to Service Module cards.

Note:

For Rt-on GT cases, UDTS generation is qualified by two conditions in the incoming MSU: 1) CgPA RI = Rt-on-SSN and 2) message handling = Return message on Error.

* The condition of some Service Module cards being available but overloaded is considered to be a partial failure.

Table 3-2 LIM Card Processing When Service Module Card is Unavailable

Routing Indicator in Incoming Message	DPC	Full or Partial Failure	Local Subsystem Status	Message Handling (see Note)	Network Management
Rt-on-GT	CPC	Full	̶	Generate UDTS	For ANSI - TFP concerning CPC For ITU - UPU and TFP concerning CPC
Rt-on-GT	TSPC	Full	̶	Generate UDTS	UPU
Rt-on-SSN	CPC	Full	̶	Generate UDTS	None
Rt-on-SSN	TSPC	Full	̶	Generate UDTS	SSP concerning TSPC
Rt-on-GT	LSS CPC	Partial *	Online	Generate UDTS	None
Rt-on-GT	TSPC	Partial *	Online	Generate UDTS	None
Rt-on-SSN	LSS CPC	Partial *	Online	Generate UDTS	None
Rt-on-SSN	TSPC	Partial *	Online	Generate UDTS	None
Rt-on-GT	LSS CPC	Partial *	Offline	Generate UDTS	TFP concerning CPC
Rt-on-GT	TSPC	Partial *	Offline	Generate UDTS	None
Rt-on-SSN	LSS CPC	Partial *	Offline	Generate UDTS	None
Rt-on-SSN	TSPC	Partial *	Offline	Generate UDTS	SSP concerning TSPC
Rt-on-GT	Non-AIQ CPC	Partial *	̶	Generate UDTS	None
Rt-on-SSN	Non-AIQ CPC	Partial *	̶	Generate UDTS	None

MSU decoding (MTP3/SCCP/TCAP decoding) and decode error handling

Common MSU decoding aspects of local SCCP subsystems include decoding MTP3, SCCP, and TCAP portions. Individual local SCCP subsystems decode only the specific TCAP parameters as needed by the subsystem.

For the AIQ local subsystem, the operation code, Digits (Dialed), and TriggerType in the TCAP Component of the incoming AnalyzedInformation message are decoded.
If the ANSI41 AIQ feature is enabled and on, the incoming message is decoded to verify that the operation code is AnalyzedInformation and that valid TriggerType and Digits (Dialed) parameters are present.
- A Return Error response is generated if the operation code is not AnalyzedInformation. A UIM is generated.
- A Reject response is generated if one or more of the parameters are not present. A UIM is generated.
- A Return Error response for a TCAP Error or a Reject response is generated if one or more of the parameters are not valid. A UIM is generated.
- Some malformed messages shall not generate any response; a UIM can be generated.
If the ANSI41 AIQ feature is enabled but turned off when an AnalyzedInformation message is received, a TCAP Error response will be generated with error code "AnalyzedInformation not allowed". No UIM will be generated. If any message other than AnalyzedInformation is received, a UIM is generated and a reply MSU is sent.

Refer to Unsolicited Alarm and Information Messages Reference for descriptions of the UIMs that can be generated for local subsystems. AIQ Local Subsystem UIMs describes the UIMs that are used specifically for the AIQ subsystem.
Response MSU Encoding (MTP3/SCCP/TCAP encoding)

The AnalyzedInformation operation success is reported with a TCAP RETURN RESULT (LAST) response.

If the ANSI41 AIQ feature is enabled and on, and the incoming AnalyzedInformation message contains valid TriggerType and Digits (Dialed) parameters, an AnalyzedInformation Return Result message is generated. The AIQOPTS RESFMT and RESPAR configuration options indicate whether to include RoutingDigits or Digits (Dialed) parameters in the response, and the format of the included parameters.
AIQ-specific Response Encoding Errors

A UIM is generated to indicate truncation of a parameter in the response message when formatting resulted in too many digits in the parameter. The response message is sent with digits truncated to the maximum allowed number.

A UIM is generated when the CdPA or CgPA cannot be encoded in the response.

ANSI41 AIQ Feature Configuration Options

The AIQOPTS table contains configuration option values for the ANSI41 AIQ feature. The AIQOPTS option data is loaded to the LIM cards. The configuration option values influence number conditioning and response message formatting and generation.

AIQOPTS options can be provisioned after the ANSI41 AIQ feature is enabled and before the feature is turned on.

Table 3-3 describes the AIQOPTS options.

Table 3-3 AIQOPTS Configuration Options

Parameter	Value	Description
DIGMAXLEN - Digits (Dialed) Parameter Maximum Digit Length	1-32	Maximum length of the digit string that will be considered valid in the Digits (Dialed) parameter of an AnalyzedInformation query. The specified value must be equal to or greater than the specified minimum length of the digit string (DIGMINLEN). Digit strings with a number of characters equal to or greater than the specified minimum length and equal to or less than the specified maximum length are considered to be valid during MSU processing. A digit string with more than the specified maximum number of characters generates an error response and a UIM. If the same value is specified for the minimum and maximum digit string length, only digit strings of that exact length are considered to be valid during MSU processing. System Default = 32.
DIGMINLEN - Digits (Dialed) Parameter Minimum Digit Length	1-32	Minimum length of the digit string that will be considered valid in the Digits (Dialed) parameter of an AnalyzedInformation query. The specified value must be equal to or less than the specified maximum length of the digit string (DIGMAXLEN). Digit strings with a number of characters equal to or greater than the specified minimum length and equal to or less than the specified maximum length are considered to be valid during MSU processing. A digit string with less than the specified minimum number of characters or with no digits generates an error response and a UIM. System Default = 1.
PFX - Digit string associated with a TRIGTYPE parameter value	1-21 hexadecimal digits, NONE	Mandatory when a TRIGTYPE parameter value is specified. The value NONE indicates that the corresponding TRIGTYPE value is not provisioned. The corresponding TRIGTYPE value will not be displayed in the `rtrv-aiqopts` command output.
RESFMT - Response Format	PFX	Specifies that the provisioned PFX parameter value that corresponds to the TRIGTYPE value (the Trigger Type value received in the AnalyzedInformation query) will be encoded in the AnalyzedInformation Return Result message.
RESFMT - Response Format	PFXDN	Specifies that the provisioned PFX parameter value + the incoming Digits (Dialed) will be encoded in the AnaluzedInformation Return Result message. This is the System Default.
RESPAR - Response Parameter	RTDIGITS	Specifies that the RoutingDigits parameter will be used when encoding the AnalyzedInformation Return Result message. This is the System Default.
RESPAR - Response Parameter	DIGITS	Specifies that the Digits (Dialed) parameter will be used when encoding the AnalyzedInformation Return Result message.
TCAPERR - TCAP error code to be returned in the Return Error response message	129-255 See Table 3-4.	The specified TCAP error code is used in the Return Error response when: The TRIGTYPE parameter is not provisioned for the Trigger Type value received in the incoming AnalyzedInformation query. The length of the Digits (Dialed) parameter is not within the provisioned range of minimum and maximum length (DIGMINLEN and DIGMAXLEN) The System Default is 138.
TRIGTYPE - Trigger Type	0-255 See Table 3-5.	An individual trigger. Each TRIGTYPE value is associated with a PFX digit string. The TRIGTYPE parameter must be specified when the PFX parameter is specified. A maximum of 20 TRIGTYPE-PFX pairs can be defined.

Table 3-4 lists the Corresponding Error Strings for the TCAP Error Codes that can be specified using the TCAPERR option.

Table 3-4 TCAP Error Codes and Corresponding Error Strings

TCAP Error Code	Error String
129	UnrecognizedMIN
130	UnrecognizedESN
131	MIN/HLRMismatch
132	OperationSequenceProblem
133	ResourceShortage
134	OperationNotSupported
135	TrunkUnavailable
136	ParameterError
137	SystemFailure
138	UnrecognizedParameterValue
139	FeatureInactive
140	MissingParameter
141-239	Reserved
240-255	Reserved for Protocol Extension

Table 3-5 lists supported Trigger Type (TRIGTYPE) values and their meanings.

Table 3-5 Trigger Type (TRIGTYPE) Values and their Meanings

Trigger Type Value	Meaning
0	Unspecified.
1	All_Calls.
2	Double_Introducing_Star.
3	Single_Introducing_Star.
4	Reserved [for Home_System_Feature_Code]
5	Double_Introducing_Pound.
6	Single_Introducing_Pound.
7	Revertive_Call.
8	0_Digit.
9	1_Digit.
10	2_Digit.
11	3_Digit.
12	4_Digit.
13	5_Digit.
14	6_Digit.
15	7_Digit.
16	8_Digit.
17	9_Digit.
18	10_Digit.
19	11_Digit.
20	12_Digit.
21	13_Digit
22	14_Digit.
23	15_Digit.
24	Local_Call.
25	Local_Toll_Call.
26	Non-Local_Toll_Call.
27	World_Zone_Call.
28	International_Call.
29	Unrecognized_Number.
30	Prior_Agreement.
31	Specific_Called_Party_Digit_String.
32	Mobile_Termination.
33	Advanced_Termination.
34	Location.
35-63	Reserved. Treat a reserved value the same as value 0, Unspecified.
64	Terminating_Resource_Available.
65	T_Busy.
66	T_No_Answer.
67	T_No_Page_Response.
68	T_Unroutable.
69-219	Reserved. Treat a reserved value the same as value 0, Unspecified.
220	Reserved for TDP-R DP value.
221	Reserved for TDP-N DP value.
222	Reserved for EDP-R DP value.
223	Reserved for EDP-N DP value.
224-255	Reserved for TIA-41 protocol extension. If unknown, treat the same as value 0, Unspecified.

EAGLE Commands

Table 3-6 lists the EAGLE commands that are used for configuration for the ANSI41 AnalyzedInformation (ANSI41 AIQ) feature.

Refer to Commands User's Guide for complete descriptions of the commands, including parameter names, valid parameter values, and output examples.

Table 3-6 EAGLE Commands used for the ANSI41 AIQ Feature

Type	Commands
Feature Control	The `chg/rtrv-feat` commands are used to turn on and display the on/off status of features that are controlled with feature bits. The `enable/chg/rtrv-ctrl-feat` commands are used to enable, turn on, and display the status of controlled features that are controlled by feature access keys. See Enabling the ANSI41 AIQ Feature and Turning On the ANSI41 AIQ Feature.
Subsystem Application	The `ent/chg/dlt/rtrv-ss-appl` commands are used to define or delete the local subsystem application, and to change and display the local subsystem application status in the database. See Provisioning the AIQ Local Subsystem.
Service Selector	The `chg/rtrv-srvsel` commands are used to provision and display service selector information for the service that is used by a feature. See Provisioning the AIQ Service Selector.
ANSI41 AIQ Options	The `chg/rtrv-aiqopts` commands are used to provision the configuration options that control processing for incoming messages and formatting of response messages. See ANSI41 AIQ Feature Configuration Options.
Local Subsystem Activation	The `alw/inh-map-ss` commands are used to allow and inhibit the operation of a mated application local subsystem. See Activating the AIQ Local Subsystem.