US 11,943,298 B2
Vehicular communication device
Shuhei Itoda, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Mar. 2, 2021, as Appl. No. 17/189,461.
Application 17/189,461 is a continuation of application No. PCT/JP2019/027460, filed on Jul. 11, 2019.
Claims priority of application No. 2018-166105 (JP), filed on Sep. 5, 2018.
Prior Publication US 2021/0185129 A1, Jun. 17, 2021
Int. Cl. H04L 12/26 (2006.01); H04J 3/06 (2006.01); H04L 67/12 (2022.01)
CPC H04L 67/12 (2013.01) [H04J 3/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A vehicular communication device configured to perform communication in accordance with an Ethernet standard, comprising:
a medium access controller (MAC) configured to execute medium access control;
a clock monitor configured to monitor a clock signal for operating the MAC;
a return processer configured to restart a clock output source that outputs the clock signal, in response to the clock monitor detecting that the clock signal is stopped; and
a plurality of physical layers (PHYs), wherein
the MAC is one of a plurality of MACs corresponding to the PHYs, respectively,
each of the PHYs is configured to operate as the clock output source and output the clock signal to corresponding one of the MACs,
the clock monitor is further configured to monitor the clock signal output by each of the PHYs, and
the return processor is further configured to individually restart the PHYs for which the clock monitor detects that an output of the clock signal is stopped in a case where a number of the PHYs for which the clock monitor detects that the output of the clock signal is stopped is less than a predetermined device reset threshold value.