State-Switching Control for Rapid SerDes Wakeup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The Automotive SerDes Alliance (ASA) standard version 1.01 does not specify a processing procedure for the Leaf device to transition from a deep sleep state to a normal state, potentially leading to delays in resuming communication.
Innovation Solution
A communication device with a state-switching control unit that manages transitions between different communication states, including a deep sleep state and a normal state, using a first communication control unit to continuously transmit a signal and a second communication control unit to synchronize signals upon receipt, allowing the device to transition from a deep sleep state to a normal state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the Leaf device enters deep sleep state to reduce power consumption, then power consumption is reduced, but the time required to resume communication increases due to lack of specified transition procedure
Solution Approach 1:
The patent applies preliminary action by having the Leaf device transmit a wakeup request signal before fully entering deep sleep state, and the Root device preparing to transmit synchronization signals. This pre-establishes the transition pathway so that when resumption is needed, both devices are already positioned to quickly re-establish synchronization without unnecessary delays.
Solution Approach 2:
The patent implements feedback through the wakeup request signal mechanism where the Leaf device signals its wake-up need to the Root device, and the Root device responds with synchronization signals. This feedback loop ensures coordinated transition and allows the system to quickly resume communication by maintaining awareness of each other's states.
2Device complexity
If the Leaf device lacks ECU and cannot autonomously transition from deep sleep state, then device complexity is reduced, but communication resumption speed decreases
Solution Approach 1:
The patent applies self-service by enabling the Leaf device to autonomously initiate the wakeup process by transmitting wakeup request signals without requiring ECU intervention. The Leaf device independently manages its transition from deep sleep state, and the Root device automatically responds with synchronization signals, creating a self-contained wakeup mechanism that maintains simplicity while ensuring rapid resumption.
3Use of energy by moving object
If synchronization is reestablished from deep sleep state without continuous signal transmission, then power consumption during idle periods is reduced, but synchronization establishment time increases
Solution Approach 1:
The patent applies periodic action by having the Leaf device transmit wakeup request signals at predetermined intervals during deep sleep state. This periodic signaling maintains synchronization awareness without requiring continuous power consumption, and when a request is sent, the Root device can quickly respond with synchronization signals, balancing power savings with rapid resumption capability.
Data Source
AI summary
Communication with state-switching control is disclosed. In one example, a communication device includes a state-switching control circuit that controls switching between a first state in which synchronization for communicating with a partner device is established, a second state in which the communication is started after establishing the synchronization, a third state in which the communication is intermittently stopped, and a fourth state in which synchronization is reestablished when restarting the communication. A first communication control circuit repeats an operation of continuously transmitting a first signal to the partner device in the fourth state, and a second communication control circuit transmits, upon receiving a second signal, a third signal synchronized with the second signal to the partner device, in which the state-switching control circuit switches, where the second communication control circuit transmits the third signal, a state from the fourth state to the first state.