Moby Dick Consolidated System Integration Plan

D0103v1.doc Version 1 6.7.2003
currently in use one). The information about the availability will be retrieved from the Network
Environment Infos block.
The Ethernet will always be considered as available, if present.
The WLAN will be considered as available if its signal to noise ratio is higher than a predefined threshold
(WLAN_threshold).
The TD-CDMA will be considered as available if its signal level is higher than a predefined threshold
(TD-CDMA_threshold).
The user will have this information: current signal level. In the first implementation stage, the user won’t
be able to execute a manual handover within the same technology. If WLAN is selected, and if a better
"Access Point" than the current one is available (better signal level), the MTNM may generate (this will
be detailed in the description of the MTNM) a fast handover between the two "Access Points", that is not
seen by the NCP (the NCP only sees the signal level of the currently used "Access Point", which is
always the best choice for this technology). The same applies to TD-CDMA.
The order to execute a manual handover will be transmitted to the Manual Handover block of the MTNM,
via the message MANUAL_HANDOVER_REQ.
An acknowledgement is expected from the MTNM, via message MANUAL_HANDOVER_ACK, with
parameter status.
As already stated, manual handover within the same technology for WLAN and TD-CDMA will be
considered only as a research topic, and will not be implemented.
In the case of automatic handover, a spontaneous acknowledgement will be sent by the MTNM, via
message AUTOMATIC_HANDOVER_ACK, with parameter status. This will be used to make the user
aware that an automatic handover has taken place.
4.1.2.1.5 Explicit Connectivity Request block
The effective connection to the network (AAAC procedures) will be explicitly triggered by the message
START_NETWORK_CONNECTION , sent by the Explicit Connectivity Request block of the NCP to the
Attach / Detach procedure block of the MTNM. The parameters will be the user login and password.
An acknowledgement is expected from the MTNM , via message
START_NETWORK_CONNECTION_ACK, with parameter status.
The message TERMINATE_NETWORK_CONNECTION will be used to end the current network
connection. It will also be sent by the Explicit Connectivity Request block to the Attach / Detach
procedure block (the handling of this message will imply no AAAC action). No parameters will be
needed.
An acknowledgement is expected from the MTNM, via message
TERMINATE_NETWORK_CONNECTION_ACK, with parameter status.
4.1.2.2 Mobile Terminal Networking Manager
The MTNM has interactions with the NCP, the different device drivers, the fast handover module, the
registration module and the paging module. It is split into the following sub-blocks.
MTNM
Set
Network
Preferences
Set
Handover
Preference
Network
Environment
Infos
Attach Procedure
Manual
Handover
Automatic
Handover
Paging
Figure 5: Mobile Terminal Networking Manager
4.1.2.2.1 Set Network Preferences block
The following schema can be used to illustrate the description of the 3 first sub-blocks.
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