Dynamic Rate Adjustment for High Speed Interconnects
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Solution Overview
Problem
The current HSI specification does not effectively manage power consumption by maintaining high link speeds even when lower speeds are sufficient, leading to suboptimal power usage and increased noise in communication devices.
Innovation Solution
Implementing a mechanism to dynamically adjust the HSI link speed based on actual data throughput needs, allowing devices to switch to lower operating points and reduce noise by selecting the most suitable frequency-voltage pair for each communication scenario.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the HSI link maintains maximum data rate at all times, then maximum data throughput is supported, but power consumption increases and noise levels rise
Solution Approach 1:
The patent implements dynamic data rate adjustment on HSI links by introducing a protocol that allows the transmitter and receiver to negotiate and switch between different operating speeds (1-100 Mbps) based on actual communication needs. The system transitions from a static maximum speed configuration to a dynamic adaptation mechanism where the data rate can be changed during operation, resolving the contradiction between maintaining maximum throughput and reducing power consumption.
Solution Approach 2:
The patent changes the operational parameters of the HSI link by introducing configurable data rate settings and a protocol for dynamic parameter adjustment. The system can modify the frequency-voltage pair and data rate parameters based on communication requirements, allowing optimization between power consumption and throughput by selecting appropriate parameter combinations for different operational scenarios.
2Productivity
If the HSI link maintains maximum data rate at all times, then maximum data throughput is supported, but noise levels increase
Solution Approach 1:
The patent implements dynamic data rate adjustment that allows the system to switch between different operating speeds based on actual communication needs. By reducing the data rate when maximum throughput is not required, the system simultaneously reduces noise generation from the interconnect, resolving the contradiction between maintaining high productivity and minimizing harmful noise effects.
3Speed
If the HSI link uses higher data rates, then faster communication is achieved, but setup and hold time requirements become more stringent
Solution Approach 1:
The patent introduces dynamic data rate adjustment that allows the system to adapt the clock frequency and data rate based on communication needs and signal integrity conditions. By dynamically selecting appropriate operating points within the 1-100 Mbps range, the system can achieve faster communication when conditions permit while maintaining adequate timing margins when signal integrity is compromised, resolving the contradiction between speed and reliability.
4Use of energy by moving object
If the HSI link operates at lower data rates, then power consumption decreases, but communication speed reduces
Solution Approach 1:
The patent implements dynamic data rate adjustment that allows the system to select the appropriate operating speed based on actual communication requirements. When low-speed communication is sufficient, the system operates at lower data rates to minimize power consumption, while automatically switching to higher speeds when fast communication is needed, thus resolving the contradiction between energy efficiency and communication speed.
Data Source
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Figure 4
Figure 5A~6A
AI summary
A data transmitter, a data receiver and an electronic device configure to be used with a method of changing a data rate of communication over an interface between the data transmitter and the data receiver are disclosed, wherein the data transmitter is associated with a first processor and transmitting data over the interface and the data receiver is associated with a second processor. The data transmitter transmits and the data receiver receives data over the interface at a first data rate. At the first processor, it is determined to change the first data rate to a second data rate. The data transmitter transmits and the data receiver receives a request to change the first data rate to the second data rate. In response thereto, a response message is transmitted by the data receiver and received by the data transmitter. When the response message comprises an acknowledgement to change the first data rate to the second data rate, the data transmitter transmits and the data receiver receives data over the interface at the second data rate. Corresponding protocol, electronic circuit and electronic device are also enclosed.