This methods is reserved for future expansion and should not be used. Currently not implemented.

Retrieves from the LBS subsystem the current capabilities of the device.

GetCurrentCapabilities() is used by the protocol module to obtain details of what types of network request the device is able to respond to. For example, this might include terminal based GPS but not terminal assisted.

The protocol module should call GetCurrentCapabilities() each time it needs to obtain the device's capabilities. The capabilities may vary as the user or network configures the device.

The device may support more than one positioning method, in which case the first one in the list is the preferred positioning method for the device. The preferred positioning method is the method returned by calling aCapabilities.GetPosMethod(0, method).

Assistance data may arrive as a result of the LBS subsystem requesting it via a call to the CLbsNetworkProtocolBase methods RequestSelfLocation() or RequestAssistanceData(). However, assistance data can also be delivered unsolicited. For example, a MT-LR location request (e.g. measurement control) from the network will normally include a default set of assistance data.

This method can also be used by the network to request that the LBS subsystem deletes all of its cached assistance data, or a subset of it. This is done by setting aReason to KPositionAssistanceDataReset and aDataMask to specify which subset of assistance data must be reset. The parameter aDataMask must not be 0, and it must be a valid bitmask of values specified by TLbsAssistanceDataItem. When using this method to reset assistance data, the parameter aData can be left empty.

CLbsNetworkProtocolBase::RequestSelfLocation() CLbsNetworkProtocolBase::RequestAssistanceData()

Location (e.g. measurement control) requests are received from the network, instructing the terminal to calculate and return its current position.

When the network protocol module calls ProcessLocationRequest() the method will return quickly. This initiates a position calculation by the LBS subsystem. When the current position is available, the subsystem return the location to the module via a call to CLbsNetworkProtocolBase::RespondLocationRequest() .

The parameter aType indicates why the network has generated the location request and can take the following values:

(a) It is the second stage of a MT-LR. This is normally generated by the network if device has responded positively to the preceding privacy request.

(b) Location requests may also generated by the network when the terminal wishes to obtain assistance data - for example via a Mobile Originated Location Request (MO-LR).

(c) A request from the terminal to transmit its current location to a remote third-party (X3P) can also result in the network generating a location request.

(d) Under some location protocols, a request from the terminal for a network based location calculation (e.g. cell-id) may also result in the network asking the terminal for its position.

(e) It is also possible for the network to send location requests without any preamble. These Network Induced Location Requests (NI-LR) are generated by the network and instruct the terminal to calculate and return its current position.

The session ID parameter is used to connect a series of requests and responses. If this location request is the result of a MT-LR the session ID will be the same as that passed in the privacy request.

Similarly, when performing a transmit to third-party (X3P), the session ID of the location request will be the same as that used to initiate the transfer.

However, in the other cases the location request starts a new session. In this situation, the session ID will be unrelated to any previous request.

Note: The aMethod parameter contains a network preferred list of positioning modes, however in order to determine the final positioning mode the LBS subsystem is using more information, like the default positioning mode ( CLbsAdmin); the number and the type of other positioning sessions and the capabilities of the AGPS positioning module (see the module configuration file). CLbsNetworkProtocolBase::RespondLocationRequest() ProcessPrivacyRequest() CLbsNetworkProtocolBase::RequestTransmitLocation() CLbsNetworkProtocolBase::RequestSelfLocation() CLbsNetworkProtocolBase::RequestNetworkLocation() ProcessSessionComplete() TLbsExternalRequestInfo TLbsNetRequestQuality TLbsNetRequestMode

Location Information may arrive as a result of the LBS subsystem requesting it via a call to CLbsNetworkProtocolBase::RequestNetworkLocation() . However, location information can be delivered unsolicited. For example, a location request (e.g. measurement control) from the network will typically include a reference location that is derived from the terminal's serving cell. The reference location is injected at most once a session. This is valid even if assistance data is reset during the positioning request in order to avoid impacting the standard behaviour of the LBS sub-system when reset message is being received.

The Session ID parameter indicates which request led to the location information being delivered. For a MT-LR, the session ID will be the ID assigned by the protocol module. This is the ID passed by the protocol module when it calls ProcessPrivacyRequest() .

If the location information was delivered as a result of a request generated by the terminal, the session ID should be the identifier used by the LBS subsystem when it initiated that request. This will be the ID passed to RequestSelfLocation(), RequestNetworkLocation() or RequestTransmitLocation() by the LBS subsystem.

Ask the LBS subsystem to process a privacy request from the network.

Privacy requests (for example an LCS-Notification) are typically the first stage of a Mobile Terminated Location Request (MT-LR). They are received from the network to determine if the handset is willing to reveal its location to an external third-party.

ProcessPrivacyRequest() supplies information about the external requestor but does not actually ask the device for its position. If the LBS subsystem responds indicating it is willing to reveal its location, the network will normally send the second stage of the MT-LR. This follow-on message is forward by the protocol module via a separate method (ProcessLocationRequest) and is the trigger for the LBS subsystem to calculate the current position.

The ProcessPrivacyRequest() method will return quickly. However, it does not indicate if request should be accepted or rejected. After the LBS subsystem has determined the user's preferences, it responds to the protocol module via a call to CLbsNetworkProtocolBase::RespondPrivacyRequest() . The response indicates if handset is willing to accept a location request.

If the terminal does indicate it is willing to accept a location request, the network will typically send a follow-on request (measurement control) that asks for the devivce's location. The protocol module forwards this second request via the method ProcessLocationRequest() .

In all subsequent requests and responses, the same unique session ID (aSessionId) must be used in order to connect the various requests and responses.

CLbsNetworkProtocolBase::RespondPrivacyRequest() ProcessLocationRequest() CLbsNetworkProtocolBase::RespondLocationRequest() ProcessSessionComplete() TLbsExternalRequestInfo TLbsLocationNotification

The protocol module issues a single call to ProcessSessionComplete() to close a session and to return the final result code to the LBS subsystem.

The aReason parameter indicates the overall success or failure for the request.

The session ID parameter identifies the session that is being closed. This ID is allocated when a new request is created:

In the case of MT-LR, the session ID is created by the protocol module when it issues the initial privacy request ( ProcessPrivacyRequest() ). That session extends through the various responses and, if appropriate, the subsequent location request ( ProcessLocationRequest() ). The protocol modules issues a single call to ProcessSessionComplete() to indicate the overall success or failure of the MT-LR.

In normal situations, ProcessSessionComplete() will be invoked when the overall request has finished. However, it may occur at any stage - for example, in the case of a MT-LR the protocol module will complete the session immediately if there was an error transmitting the initial privacy response back to the network.

Similarly, ProcessSessionComplete() is also used by the protocol module to terminate a request if a protocol conflict has arisen. For example, the location protocol may be unable to simulateously perform two requests.

For a MT-LRs and NI-LRs the session ID are assigned by the network protocol module. For other requests, the session ID is generated by the LBS subsystem. In either situation, the assigned session ID is used by both the protocol module and the LBS subsystem to connect requests and responses arising from a particular request.

Provides the LBS subsystem with details of the current status of the network protocol module

ProcessStatusUpdate() provides a bit mask of values from TLbsNetProtocolService. The bit-mask indicates which services are currently being handled by the protocol module.

For example, if the protocol module is currently processing a Mobile Terminated Location Request and a local request for assistance data, aActiveServiceMask will be set to EServiceMobileTerminated + EServiceAssistanceData.

The method is called each time the services that are active in the protocol module change.

Get the current version of the observer interface

Values of type TLbsNetProtocolService describe the processes that can be active or queued in network protocol module.

A single value is supplied as a parameter in ProcessLocationRequest() to indicate why the location request was generated.

ProcessStatusUpdate() provides a mask of TLbsNetProtocolService values to indicate all the various tasks being performed or queued by the protocol module.

ProcessLocationRequest() TLbsNetProtocolServiceMask ProcessStatusUpdate()

TLbsNetProtocolServiceMask is used to hold a bit mask of values of TLbsNetProtocolService. This is used by ProcessStatusUpdate() to indicate the tasks currently being processed or queued by the network protocol module

ProcessStatusUpdate() TLbsNetProtocolService