MAC PHY Interface Synchronization for Energy Efficient Networking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As the demand for higher data rates in Ethernet networks increases, conventional approaches lead to significant power consumption, posing challenges for battery life in portable devices and requiring new transmission technologies that reduce energy usage while maintaining synchronization between MAC and PHY devices.
Innovation Solution
The method involves configuring the MAC and PHY interface to operate in an energy-saving mode by adjusting the clock frequency, amplitude, or duty cycling, and communicating dummy data to maintain synchronization, with the interface exiting this mode when data is received, thereby reducing power consumption without introducing prohibitive delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the interface operates in energy saving mode with reduced clock frequency, then power consumption is reduced, but synchronization between MAC and PHY may be lost
Solution Approach 1:
The patent applies periodic action by implementing periodic clock signals that are transmitted at reduced frequency during energy saving mode. The MAC layer transmits periodic clock signals at a lower frequency than the data rate, allowing the PHY layer to maintain synchronization without requiring continuous high-frequency clock signals. This periodic clock transmission enables the system to reduce power consumption while preserving synchronization between MAC and PHY layers.
Solution Approach 2:
The patent changes the clock frequency parameter by operating at a reduced clock frequency during energy saving mode. The interface transitions from full-speed operation to a lower frequency mode, thereby reducing power consumption. The MAC layer adjusts its clock signal output to match this reduced frequency, and the PHY layer accordingly operates at the lower frequency, maintaining synchronization despite the parameter change.
2Reliability
If the interface exits energy saving mode frequently to maintain synchronization, then synchronization is maintained, but power consumption increases
Solution Approach 1:
The patent ensures continuity of useful action by maintaining continuous periodic clock signal transmission during energy saving mode. Rather than intermittently waking up to resynchronize, the system continuously transmits clock signals at reduced frequency, keeping the synchronization relationship active and stable. This continuous low-frequency operation is more energy-efficient than periodic high-frequency wake-ups.
3Reliability
If dummy data is transmitted to maintain synchronization, then synchronization is preserved, but data transmission efficiency decreases
Solution Approach 1:
The patent extracts the synchronization function from the data transmission function. Instead of embedding synchronization requirements within data packets, the system uses separate periodic clock signals dedicated solely to maintaining synchronization. This extraction allows dummy data to be transmitted independently of actual data traffic, enabling synchronization maintenance without interfering with data transmission efficiency.
Solution Approach 2:
The patent introduces periodic clock signals as an intermediary mechanism between MAC and PHY layers. These clock signals serve as a mediator that maintains synchronization without requiring the transmission of actual data. The clock signals act as a separate synchronization channel that operates independently from data traffic, allowing the system to maintain synchronization efficiency without compromising data transmission performance.
Data Source
AI summary
Aspects of a method and system for MAC and PHY synchronization for energy efficient networking are provided. In this regard, an interface that enables communication between a MAC controller and a PHY device may be configured to operate in an energy saving mode. While the interface is operating in an energy saving mode, synchronization between the MAC controller and the PHY device may be maintained by one or both of adjusting a clock generated for the interface and/or communicating dummy data via the interface. The clock may be adjusted by one or more of adjusting a frequency of the clock, adjusting an amplitude of the clock, and/or duty cycling the clock. The MAC controller and/or the PHY device may generate the dummy data. The PHY device and/or the MAC controller may discard the dummy data upon receiving the dummy data.