Switch device, communication control method and recording medium
A switch device for relaying data in an on-vehicle network, being equipped with a switch section and a processing section for performing the relay processing via the switch section, wherein, in the case that a plurality of frames to be subjected to the relay processing is present in the processing section, the processing section performs adjustment processing so that the output rates of the respective frames to the switch section in the case that the transmission source addresses of the respective frames are different are made smaller than the output rate in the case that the transmission source addresses of the respective frames are the same.
1. A switch device for relaying data in an on-vehicle network, comprising:
a switch section for performing a first relaying processing as a layer 2 switch for a low-order relay frame that is a frame between on-vehicle devices belonging to a same subnet, and
a processing section for performing a second relay processing as a layer 3 switch via the switch section for a high-order relay frame that is a frame between on-vehicle devices belonging to subnets different from each other, wherein
the switch section transmits the low-order relay frame at a constant transmission speed, and
in the case that a first high-order relay frame and a second high-order relay frame that are frames to be subjected to the second relay processing are present in the processing section, the processing section performs adjustment processing to set the transmission speeds of the first high-order relay frame and the second high-order relay frame to a first speed in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are same, and to set the transmission speeds of the first high-order relay frame and the second high-order relay frame to a second speed that is lower than the first speed in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are different.
2. The switch device according to claim 1 , wherein the processing section sets the transmission speeds of the first high-order relay frame and the second high-order relay frame in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are different to the same value.
3. The switch device according to claim 2 , wherein, in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are different, the processing section outputs the first high-order relay frame and the second high-order relay frame to the switch section according to the priority of the respective transmission source addresses.
4. The switch device according to claim 1 , wherein the processing section sets output rates of the first high-order relay frame and the second high-order relay frame in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are different to different values at all or some of the respective transmission source addresses.
5. The switch device according to claim 1 , wherein the processing section periodically confirms whether a plurality of high-order relay frames to be subjected to the second relay processing is present.
6. The switch device according to claim 1 , wherein the processing section performs the adjustment processing in the case that a predetermined number or more of high-order relay frames to be subjected to the second relay processing have been stored.
7. A communication control method in a switch device for relaying data in an on-vehicle network and being equipped with a switch section for performing a first relaying processing as a layer 2 switch for a low-order relay frame that is a frame between on-vehicle devices belonging to a same subnet, and a processing section for performing a second relay processing as a layer 3 switch via the switch section for a high order relay frame that is a frame between on-vehicle devices belonging to subnets different from each other, comprising:
the step of transmitting the low-order relay frame at a constant transmission speed by the switch section,
the step of performing the second relay processing via the switch section and
the step of confirming, whether a plurality of frames to be subjected to the second relay processing is present in the processing section, wherein
in the step of performing the second relay processing, in the case that a first high-order relay frame and a second high-order relay frame that are frames to be subjected to the second relay processing are present in the processing section, adjustment processing is performed to set the transmission speeds of the first high-order relay frame and the second high-order relay frame to a first speed in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are same, and to set the transmission speeds of the first high-order relay frame and the second high-order relay frame to a second speed that is lower than the first speed in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are different.
8. A computer readable non-transitory recording medium recording a communication control program for use in a switch device for relaying data in an on-vehicle network and for making a computer function as:
a switch section for performing a first relaying processing as a layer 2 switch for a low-order relay frame that is a frame between on-vehicle devices belonging to a same subnet, and
a processing section for performing a second relay processing as a layer 3 switch via the switch section for a high-order relay frame that is a frame between on-vehicle devices belonging to subnets different from each other, wherein,
the switch section transmits the low-order relay frame at a constant transmission speed, and
in the case that a first high-order relay frame and a second high-order relay frame that are frames to be subjected to the second relay processing are present in the processing section, the processing section performs adjustment processing to set the transmission speeds of the first high-order relay frame and the second high-order relay frame to a first speed in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are same, and to set the transmission speeds of the first high-order relay frame and the second high-order relay frame to a second speed that is lower than the first speed in the case that the transmission source addresses of the first high-order relay frame and the second high-order relay frame are different.