9 LMU LCS Protocol operation specifications
3GPP44.071GSM/EDGE Location Services (LCS)Mobile radio interface layer 3 LCS specificationRelease 17TS
9.1 General
This clause specifies the abstract syntax for the LMU LCS Protocol using the Abstract Syntax Notation One (ASN.1), defined in ITU-T Recommendation X.680.
The encoding rules which are applicable to the defined abstract syntax are the Packet Encoding Rules for Abstract Syntax Notation One, defined in ITU-T Recommendation X.691. For each Location Service parameter which has to be transferred by a Location Service message, there is a PDU field (an ASN.1 NamedType) whose ASN.1 identifier has the same name as the corresponding parameter, except for the differences required by the ASN.1 notation (blanks between words are removed, the first letter of the first word is lower-case and the first letter of the following words are capitalized (e.g. "bearer service" is mapped to "bearerService"). In addition some words may be abbreviated as follows:
– lmu location measurement unit;
– lcs location services.
The ASN.1 data type which follows the keywords ARGUMENT "PARAMETER" or "RESULT" (for OPERATION and ERROR) is always optional from a syntactic point of view. However, except specific mention, it has to be considered as mandatory from a semantic point of view. When in an invoke component, a mandatory element is missing in any component or inner data structure, a reject component is returned with the problem code "Mistyped Parameter". When an optional element is missing in an invoke component or in an inner data structure while it is required by the context, an error component is returned; the associated type of error is "DataMissing".
In case an element is defined as mandatory in the protocol description (including imports from 3GPP TS 29.002), but is not present according to the service description (stage 1 to stage 3), the ASN.1 protocol description takes precedence over the diagrams in the 3GPP TS 24.08x and 3GPP TS 24.09x-series of technical specifications.
When possible operations and errors are imported from 3GPP TS 29.002.
Timer values for operations which require timers are shown as ASN.1 comments.
Ellipsis Notation shall be used in the same way as described in 3GPP TS 29.002 and shall be supported on the radio interface by the LMU and the network for all operations defined in the present document including those imported from 3GPP TS 29.002.
9.2 Operation types
Table 9.2 summarizes the operations defined for LMU LCS Protocol in the present document, and shows which of these operations are Radio Interface Timing (RIT) related and general LMU procedures related. In this ASN.1 module, ASN.1/88 defined in ITU-T Recommendation X.680 (ASN.1 1997) is used.
Table 9.2: Relevance of location service operations
|
Operation name |
Direction |
Response allowed |
RIT |
General LMU |
|
StartRIT |
SMLC -> LMU |
ReturnResult (empty) . |
X |
|
|
ReportRIT |
LMU -> SMLC |
No |
X |
|
|
StopRIT |
SMLC -> LMU |
ReturnResult (empty). |
X |
|
|
IndicateRITError |
LMU -> SMLC |
No |
X |
|
|
StatusQuery |
SMLC -> LMU |
ReturnResult |
X |
|
|
StatusUpdate |
LMU -> SMLC |
ReturnResult |
X |
|
|
ResetRequest |
SMLC -> LMU |
ReturnResult (empty). |
X |
|
|
OMMngrRequest |
SMLC -> LMU |
ReturnResult |
X |
|
|
OMAgntRequest |
LMU -> SMLC |
ReturnResult |
X |
The present document defines the following operations:
– StartRIT.
– ReportRIT.
– StopRIT.
– IndicateRITError.
– StatusQuery.
– StatusUpdate.
– ResetRequest.
– OMMngrRequest.
– OMAgntRequest.
— LLP-Operations module defines the operations transparent to MSC
LLP-Operations
— { LLP-Operations object identifier }
DEFINITIONS ::=
BEGIN
IMPORTS
OPERATION
FROM TCAPMessages {
ITU-T recommendation q 773 modules (2) messages (1) version2 (2)}
SystemFailure,
DataMissing,
UnexpectedDataValue,
FacilityNotSupported,
UnknownSubscriber,
FROM MAP-Errors {
ITU-T identified-organization (4) etsi (0) mobileDomain (0)
gsm-Network (1) modules (3) map-Errors (10) version4 (4)}
UnDefinedError
FROM LLP-Errors
— {}
StartRITReq,
StartRITRsp,
ReportRITArg,
StopRITReq,
StopRITRsp,
ErrorRITArg,
PerformTOAReq,
TOAResultRsp,
StatusReq,
StatusRsp,
ResetReq,
ResetRsp,
StatusUpdateReq,
StatusUpdateRsp
FROM LLP-DataTypes {
ITU-T identified-organization (4) etsi (0) mobileDomain (0)
gsm-Network (1) modules (3) map-LCS-DataTypes (n) version4 (4)}
OMMngrReq,
OMMngrRsp,
OMAgntReq,
OMAgntRsp,
NACKCauses
FROM LLP-OM-Protocol –{ LLP-OM-Protocol Object identifier }–
;
— OPERATION definitions based on macro notation
StartRIT::= OPERATION — identifier StartRIT-Measurement
ARGUMENT
startRITReq StartRITReq
RESULT
startRITRsp StartRITRsp
ERROR {
SystemFailure,
DataMissing,
UnexpectedDataValue,
ResourcesNotAvailable,
UnDefinedError
}
ReportRIT::= OPERATION — identifier ReportRIT-Measurement
ARGUMENT
reportRITArg ReportRITArg
StopRIT::= OPERATION — identifier StopRIT-Measurement
ARGUMENT
stopRITReq StopRITReq
RESULT
StopRITRsp StopRITRsp
IndicateRITError ::= OPERATION
ARGUMENT
errorRITArg ErrorRITArg
PerformTOA::= OPERATION — identifier PerformTOA-Measurment
ARGUMENT
performTOAReq PerformTOAReq
RESULT
toaResultRsp TOAResultRsp
ERROR {
SystemFailure,
DataMissing,
UnexpectedDataValue,
ResourcesNotAvailable,
UnDefinedError
}
StatusQuery::= OPERATION
ARGUMENT
statusReq StatusReq
RESULT
statusRsp StatusRsp
ERROR {
}
ResetRequest::= OPERATION
ARGUMENT
resetReq ResetReq
RESULT
resetRsp ResetRsp
ERROR {
SystemFailure,
UnDefinedError
}
OMMngrRequest ::= OPERATION — defined in LLP-OM, 52.071
ARGURMENT
oMMngrReq OMMngrReq
RESULT
oMMngrRsp OMMngrRsp
ERROR
{
NACKCauses
}
OMAgntRequest ::= OPERATION — defined in LLP-OM, 52.071
ARGURMENT
oMAgntReq OMAgntReq
RESULT
oMAgntRsp OMAgntRsp
ERROR
{
NACKCauses
}
StatusUpdate ::= OPERATION — identifier Status Update
ARGUMENT
statusUpdateReq StatusUpdateReq
RESULT
statusUpdateRsp StatusUpdateRsp
ERROR {
SystemFailure,
DataMissing,
UnexpectedDataValue,
ResourceNotAvailable,
UnDefinedError
}
END
9.2.1 Operation types description
For each operation type this subclause provides a brief prose description.
9.2.1.1 StartRIT (network –> LMU)
This operation type is invoked by the network to request RIT measurement information from an LMU.
9.2.1.2 ReportRIT (LMU –>network)
This operation type is invoked by an LMU to report to the network RIT measurement information. This operation is used to report periodical measurements.
9.2.1.3 StopRIT (network –> LMU)
This operation type is invoked by the network to request an LMU to stop on-going RIT measurements and reporting.
9.2.1.4 IndicateRITError (LMU –> network)
This operation type is invoked by an LMU to indicate error situations.
9.2.1.5 (void)
9.2.1.6 StatusQuery (network –> LMU)
This operation type is invoked by the network to request status an LMU The status is returned using the return result component of the operation.
9.2.1.7 StatusUpdate (LMU –> network)
This operation type is invoked by an LMU to report status of LMU, e.g. after reset or periodically.
9.2.1.8 ResetRequest (network –> LMU)
This operation type is invoked by the network to reset an LMU.
9.2.1.9 OMMngrRequest (network –> LMU)
This operation type is invoked by the network to request a specific O&M activity to LMU as defined in 3GPP TS 52.071.
9.2.1.10 OMAgntRequest (LMU –> network)
This operation type is invoked by the LMU to report an O&M event to Network or asking for reporting O&M information from Network as defined in 3GPP TS 52.071.
10.3 Error types
10.3.1 Error types ASN.1 specification
The following ASN.1 module provides an ASN.1 specification of errors. Errors from MAP are imported in the LCS‑Protocol module in subclause 9.2. In this ASN.1 module, ASN.1/88 defined in ITU-T Recommendation X.680 recommendations (ASN.1 1997) is used.
LLP-Errors
— { LLP-Errors object identifier }
DEFINITIONS ::=
BEGIN
IMPORTS
ERROR FROM
TCAPMessages FROM {
ITU-T recommendation q 773 modules (2) messages (1) version2 (2) }
;
— The MAP errors
— error types definition
UnDefinedError ::=ERROR
END
10.3.2 Error types description
For each error type this subclause provides a brief prose description.
10.3.2.1 (void)
10.3.2.2 (void)
10.3.2.3 (void)
10.3.2.4 SystemFailure
This error is returned by the LMU or the network, when it cannot perform an operation because of a failure.
10.3.2.5 DataMissing
This error is returned by the network or the LMU when an optional parameter is missing in an invoke component or an inner data structure, while it is required by the context of the request.
10.3.2.6 UnexpectedDataValue
This error is returned by the network or the LMU when it receives a parameter with an unexpected value, without type violation.
10.3.2.7 ResourcesNotAvailable
This error is returned by the network or the LMU if temporarily there are no resources.
10.3.2.9 UnDefinedError
This error is returned by the LMU or the network when any other error type is not applicable.
10.4 Operations and errors implementation
For the actual implementation of location services, operations and errors have to be defined by value. The following ASN.1 module, imports operation types from the ASN.1 module described in subclause 9.2 and operation and error types from MAP. It defines operations by allocating operations and errors a local value. For the involved operations and errors the same local values as in MAP are allocated. In this ASN.1 module, ASN.1/88 defined in ITU-T Recommendation X.680 (ASN.1 1997) is used.
LLP-Protocol
— { LLP-Protocol object identifier }
DEFINITIONS ::=
BEGIN
IMPORTS
SystemFailure,
DataMissing,
UnexpectedDataValue,
FacilityNotSupported,
UnknownSubscriber,
FROM MAP-Errors {
ccitt identified-organization (4) etsi (0) mobileDomain (0)
gsm-Network (1) modules (3) map-Errors (10) version4 (4)}
UnDefinedError
FROM LLP-Errors
— { LLP-Errors object identifier }
StartRIT,
ReportRIT,
StopRIT,
IndicateRITError,
PerformTOA,
StatusQuery,
ResetRequest,
OMRequest,
OMReport,
StatusUpdate
FROM -LLP-Operations
— { LLP-Operations object identifier }
— allocate local values for errors
systemFailure SystemFailure ::= localValue 10
dataMissing DataMissing ::= localValue 11
unexpectedDataValue UnexpectedDataValue ::= localValue 12
facilityNotSupported FacilityNotSupported ::= localValue 13
unknownSubscriber UnknownSubscriber ::= localValue 14
unDefinedError UnDefinedError ::= localValue 50
startRIT StartRIT ::= localValue 10
reportRIT ReportRIT ::= localValue 11
stopRIT StopRIT ::= localValue 12
indicateRITError IndicateRITError ::= localValue 13
performTOA PerformTOA ::= localValue 20
statusQuery statusQuery ::= localValue 30
resetRequest ResetRequest ::= localValue 31
omMngrRequest OMMngrRequest ::= LocalValue 32
omAgntRequest OMAgntRequest ::= LocalValue 33
StatusUpdate StatusUpdate ::= LocalValue 34
END