Solution to Assignment #2

This is one (of many) solutions to the second assignment. The solution does not include the task network. It also does not trace all of the components back to the Use Cases, Use Case Scenarios and Requirements as required by the Assignment. This solution is the one that will be used in the third assignment.

Initial Subsystem Analysis

The substems were initially chosen to conform to a closed system architecture in three layers.

Subsystem Description Services Provided
IDVTCS Interface Interface between the application level and the IDVTCS
Provide the current location.
Provide the current local environment.
Provide information stored in node databases.
A vehicle can request that a resource be reserved.
A resource can be asked to reserve a resource.

Environment Manages information about the vehicle and its local environment.
Manage the current location.
Manage the current local environment.
Manage information stored in the local database.
Retrieve information from remote databases and store it locally.

Reservation Negotiates reservations for resources
Reserve a specified resource.
Manage negotiation for shared resources.

Database Management Local database management system
Retrieve location.
Store location.
Retrieve environment.
Update environment.
Retrieve information.
Store information.

Sensors Devices and system for tracking objects in the local environment
Get obstacles in the local environment.
Identify obstacles in the local environment.

Positioning System Device and system for determining vehicle position
Get the current location.

Communication Manager Device and system for communicating with other IDVTCS nodes
Request information from another database.
Request a reservation for a shared resource.

Subsystem	Description	Services Provided
IDVTCS Interface	Interface between the application level and the IDVTCS	Provide the current location. Provide the current local environment. Provide information stored in node databases. A vehicle can request that a resource be reserved. A resource can be asked to reserve a resource.
Environment	Manages information about the vehicle and its local environment.	Manage the current location. Manage the current local environment. Manage information stored in the local database. Retrieve information from remote databases and store it locally.
Reservation	Negotiates reservations for resources	Reserve a specified resource. Manage negotiation for shared resources.
Database Management	Local database management system	Retrieve location. Store location. Retrieve environment. Update environment. Retrieve information. Store information.
Sensors	Devices and system for tracking objects in the local environment	Get obstacles in the local environment. Identify obstacles in the local environment.
Positioning System	Device and system for determining vehicle position	Get the current location.
Communication Manager	Device and system for communicating with other IDVTCS nodes	Request information from another database. Request a reservation for a shared resource.

Subsystem Use Cases
IDVTCS Interface All
Environment Request Information, Sense and Locate
Reservation Negotiate
Database Management Request Information, Sense and Locate
Sensors Sense
Positioning System Locate
Communication Manager Request Information and Negotiate

Subsystem	Use Cases
IDVTCS Interface	All
Environment	Request Information, Sense and Locate
Reservation	Negotiate
Database Management	Request Information, Sense and Locate
Sensors	Sense
Positioning System	Locate
Communication Manager	Request Information and Negotiate

Sequence Diagrams

The following are the classes. These are analysis classes not design classes. The classes were not placed in subsystems and no associations are shown.

The following are the sequence diagrams. Each sequence diagram arises from a use case.

Determine Location Use Case
Sense Use Case
Request Information Use Case
The first sequence diagram illustrates a request for locally available information. The second illustrates a request for information that is not available locally.
Negotiate Use Case
This is one example of many that could be given here. In this sequence diagram, a second request can be made by the Negotiator of either the Resource IDVTCS or the Vehicle IDVTCS.