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Figure 4 ) State transition diagram
When the power status of the vehicle changes, the power status of the IVI will transition. The cause of the change in the vehicle power state depends on the vehicle signal, CAN signal, vehicle system, etc. Therefore, the required state/transition may be different depending on the product and hardware requirements of each OEM. However, the above state transition diagram shows the state that realizes the use cases defined in this document. Each OEM should add or delete state/transition as necessary.
Use case | State transition diagram | The condition of transition |
|---|---|---|
(1)IVI(quick) startup | (A), (B) | (A)The transition request to change the selected services states to “Ready” is sent from the Hardware side. (B)The transition request to change the IVI state to “Running” is sent from the Hardware side. |
(2)IVI shutdown | (C), (E) | (C)The transition request to change the IVI state to “Power-off” is sent from the Hardware side. (E)When no transition request is received and a certain amount of time has passed, the state is changed. |
(3)Startup unlinked with the ACC | (A), (F) | (A)The transition request to change the selected services states to “Ready” is sent from the Hardware side. (F)The transition request to change the selected services states to “Partially Running” is sent from pressing a button for IVI-ON. |
(4)Delayed ending | (C) | (C)When the transition request to change the IVI state to “Power-off” is sent from the Hardware side, the state goes through “Partially running” once. If there is a request to execute the function, it is done in this state. |
(5)Remote parking system | (A), (F) | (A)The transition request to change the selected services states to “Ready” is sent from the Hardware side. (F)The transition request to change the selected services states to “Partially Running” is sent from the user’s smartphone. |
(6)Demotion assistance | (C) | (C)When the transition request to change the IVI state to “Power-off” is sent from the Hardware side, the state goes through “Partially running” once. If there is a request to execute the function, it is done in this state. |
(7)Return to the car soon | (C), (D) | (C)The transition request to change the IVI state to “Power-off” is sent from the Hardware side. (D)The transition request to change the IVI state to Running is sent from the Hardware side. |
(8)Return to the car temporally | (A), (G) | (A)The transition request to change the selected services states to “Ready” is sent from the Hardware side. |
Table 5
Functional Requirements
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