Network Switch Clock Frequency Control for Lower Power and Heat
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Network switches face high power consumption and temperature issues due to generating clock signals at maximal frequency to accommodate the highest bandwidth requirements, even when not all ports are in use, leading to inefficient operation.
Innovation Solution
A method to dynamically adjust the frequency of the clock signal based on the actual number of input/output ports in use and their data transmission rates, using a connection-state detector to assert control signals for the phase-locked loop clock signal generator, ensuring the clock signal is optimized for the specific operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the clock signal frequency is set to the maximal bandwidth requirement, then the network switch can accommodate the highest bandwidth (1000 Mb/s), but the power consumption and temperature increase significantly
Solution Approach 1:
The patent implements dynamic frequency adjustment of the clock signal based on the actual operational needs of the network switch. The control chip monitors the bandwidth requirements of active ports and adjusts the clock signal frequency accordingly, transitioning from a static high-frequency operation to a dynamic adaptive frequency scheme that matches actual traffic demands
Solution Approach 2:
The patent changes the frequency parameter of the clock signal dynamically based on port usage conditions. When all ports operate at maximum bandwidth (1000 Mb/s), the clock signal frequency is set to 100 MHz; when ports operate at lower bandwidths or are idle, the frequency is reduced to 50 MHz or 25 MHz, optimizing power consumption while maintaining performance
2Adaptability or versatility
If the clock signal frequency is set to the maximal bandwidth requirement, then the network switch can support all ports at highest bandwidth, but the control chip operates at high speed resulting in high temperature
Solution Approach 1:
The control chip dynamically adjusts its operating frequency based on actual port usage and bandwidth requirements. By monitoring the operational state of network ports and adapting the clock signal frequency accordingly, the control chip avoids sustained high-speed operation and the associated heat generation while maintaining the capability to handle maximum bandwidth when needed
3Reliability
If the clock signal frequency is set to the maximal bandwidth requirement, then the network switch is prepared for all ports at highest bandwidth, but it leads to inefficient operation when not all ports are in use
Solution Approach 1:
The patent implements a feedback mechanism where the control chip continuously monitors the operational state of network ports including connection status and bandwidth requirements. Based on this feedback information, the control chip dynamically adjusts the clock signal frequency to match actual traffic demands, ensuring the system is prepared for maximum bandwidth when needed while optimizing efficiency during normal operation
Solution Approach 2:
The system transitions from a static high-frequency operation mode to a dynamic adaptive frequency scheme that responds to actual port usage conditions, improving operational efficiency by matching the clock signal frequency to real-time network traffic requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption and temperature by operating the control chip at optimal speeds, minimizing unnecessary high-frequency operations and enhancing network switch performance.
Implementation Method 1
a phase-locked loop (PLL) clock signal generator 103... the PLL clock signal generator 103 generates a clock signal
Data Source
AI summary
A method for optimizing frequency of a clock signal is provided for operations of a network switch. The network switch includes a clock signal generator for generating the clock signal, and a plurality of input/output ports for communicating therevia with at least one network node. Firstly, a control signal is asserted to the clock signal generator according to a certain condition of the input/output ports, e.g. the count of the I/O ports in use or the overall data transmission rate of the I/O ports in use. Then, the frequency of the clock signal outputted from the clock signal generator is adjusted in response to the control signal.