Moby Dick Consolidated System Integration Plan

D0103v1.doc Version 1 6.7.2003
NCP
Set
Network
Preferences
Set
Handover
Preference
Manual
Handover
Network
Environment
Infos
Explicit
Connectivity
Request
MTNM
Set
Network
Preferences
Set
Handover
Preference
Network
Environment
Infos
Manual Handover
Attach / Detach
Procedure
Figure 4: Networking Control Panel
4.1.2.1.3 Network Environment Info block
This block will give information to the user, about the network availability. The Ethernet will be either
absent or present. The WLAN will have a certain signal to noise ratio and the TD-CDMA will have a
certain signal level.
These information will be transmitted by the Network Environment Info block of the MTNM, via the
message NETWORK_ENVIRONMENT_INFOS.
If more than one WLAN or TD-CDMA Access Point is available, only information about the one
currently in use by the IP stack, or if another technology is in use by the IP stack, the one with the higher
signal level; will be transmitted by the MTNM to the NCP. At the user level, we only want a choice
between different network technologies, not a choice among the same network technology. We consider a
choice between the same network technology for WLAN and TD-CDMA, to enable QoS driven handover
for example, or to consider inter domain handover within the same technology.
The information about network availability will be used during a manual handover, as explained in the
associated block description.
This block will also indicate which Network technology is currently being used. This information is also
transmitted by the Network Environment Info block of the MTNM, via the message
NETWORK_TECHNOLOGY_IN_USE (it will also contain the subnet prefix of the associated Access
Router, to which we are currently attached). It will be updated when a change occurs, triggered by the
Attach Procedure block, Manual Handover block, Automatic Handover block of the MTNM.
This block will also enable the user to control the paging state. The message SET_PAGING_STATE sent
to the MTNM will require entering the following paging state: either dormant or active. The MTNM will
forward it to the paging module. This is the way the user is allowed to control paging state, for
demonstration purpose.
The message PAGING_STATE_INFO received from MTNM (originating from the Paging module) will
indicate any change in the paging state, dormant or active.
4.1.2.1.4 Manual Handover block
If the Handover preference is set to manual or both, the user can execute a manual handover, selecting
among the 3 network technologies (Ethernet, WLAN, TD-CDMA), one that is available (but not the
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