Vehicle network system and a method of controlling states of vehicle apparatuses
First Claim
Patent Images
1. A vehicle network system, comprising:
- a transmission path;
a plurality of slave apparatuses connected to the transmission path;
one master apparatus connected to the transmission path, the master apparatus controlling states of the respective slave apparatuses through the transmission path, the master apparatus including a command notifying device that periodically notifies the respective slave apparatuses of a system state command containing a system state in which states of all of the slave apparatuses are collectively managed, wherein each of the slave apparatuses includes;
a memory which stores a current apparatus state of the respective slave apparatuses;
a determining device for determining whether the current apparatus state stored in said memory of the slave apparatus coincides with the system state in the system state command that is received from the master apparatus; and
an apparatus state changing device for making the current apparatus state stored in said memory of the slave apparatus coincident with the system state when the determining device determines that the current apparatus state of the slave apparatus does not coincide with the system state.
1 Assignment
0 Petitions
Accused Products
Abstract
A communication IC (11a) in an AV controller (1) periodically notifies plural slave apparatuses (e.g., a CD player (3), a radio (5), and an amplifier (7)) of a system state command containing a system state in which states of all the plural slave apparatuses are managed in a lump. CPUs (13a to 13d) of the slave apparatuses determine whether or not the current apparatus state of the corresponding slave apparatus coincides with the system state in the system state command from the AV controller. If the current own apparatus state does not coincide with the system state in the system state command, the current own apparatus state is made coincident with the system state command.
-
Citations
10 Claims
-
1. A vehicle network system, comprising:
-
a transmission path;
a plurality of slave apparatuses connected to the transmission path;
one master apparatus connected to the transmission path, the master apparatus controlling states of the respective slave apparatuses through the transmission path, the master apparatus including a command notifying device that periodically notifies the respective slave apparatuses of a system state command containing a system state in which states of all of the slave apparatuses are collectively managed, wherein each of the slave apparatuses includes;
a memory which stores a current apparatus state of the respective slave apparatuses;
a determining device for determining whether the current apparatus state stored in said memory of the slave apparatus coincides with the system state in the system state command that is received from the master apparatus; and
an apparatus state changing device for making the current apparatus state stored in said memory of the slave apparatus coincident with the system state when the determining device determines that the current apparatus state of the slave apparatus does not coincide with the system state. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of controlling states of vehicle apparatuses, comprising the steps of:
-
providing a plurality of slave apparatuses and one master apparatus which are connected to a transmission path, wherein the master apparatus controls states of the slave apparatuses through the transmission path;
storing a current apparatus state in a memory of each of said plurality of slave apparatuses as a current apparatus state;
causing the master apparatus to periodically notify the slave apparatuses of a system state command containing a system state in which states of all of the plural slave apparatuses are collectively managed;
causing each of the slave apparatuses to determine whether the current apparatus state of the slave apparatus coincides with the system state in the system state command which is received from the master apparatus; and
making the current state of the slave apparatus coincident with the system state when it is determined that the current apparatus state of the slave apparatus does not coincide with the system state. - View Dependent Claims (8, 9, 10)
-
Specification