Patent ID: 9478087
Filing Date: 2016-10-25
CPC Classification: G07C

Claim Text:
1. A method comprising: transmitting an indication of an operating state of a first communications module in a vehicle by a second communications module in the vehicle via a second communication channel, the first communications module communicating via a first communications channel and the operating state corresponding to a first mode; receiving, by the first communications module from a remote device via the first communication channel, a long acknowledgment message responsive to the indication and having a duration influenced by the operating state when the operating state corresponds to a lower power state; transitioning the first communications module from the first mode to a second mode in response to receiving the acknowledgment, the first communications module continuously monitoring the first communication channel in the second mode; transmitting, by the second communications module via the second communication channel, a second indication of the operating state of the first communications module corresponding to the second mode; and receiving, by the first communications module from the remote device via the first communication channel, a short acknowledgment message responsive to the second indication and having a second duration influenced by the operating state when the operating state corresponds to a higher power state, wherein the second duration is shorter than the duration.