HSDPA Communications Circuit Power Management
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Solution Overview
Problem
Existing techniques for reducing power consumption in wireless communications circuits, such as clock gating and power supply disconnection, do not adequately address when these measures should be implemented, leading to inefficiencies in dynamic and leakage power management, especially in high data rate channels like 3GPP HSDPA.
Innovation Solution
A communications circuit that monitors control channels to power up or down the receiver and bit rate processing modules based on data reception needs, allowing independent control of clock and power supply to reduce power consumption, with the circuit configured to operate under the 3GPP HSDPA standard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If clock gating and power supply disconnection are used to reduce power consumption, then energy efficiency is improved, but the timing for implementing these measures is not adequately addressed leading to inefficiencies
Solution Approach 1:
The control channel is monitored in advance to detect upcoming data transmissions before they occur. This preliminary detection allows the receiver portion to be powered up proactively, ensuring it is ready to receive data while avoiding unnecessary power consumption during periods when no data is expected. The system performs preliminary monitoring of control channels to trigger power management actions at the optimal time.
2Reliability
If the receiver portion is kept powered on continuously to ensure data reception capability, then reliability of data reception is improved, but power consumption increases
Solution Approach 1:
The system continuously monitors control channels to receive feedback information about upcoming data transmissions. Based on this feedback, the receiver portion dynamically adjusts its power state - powering up when data is expected and powering down when no data is anticipated. This feedback-driven approach ensures reliable data reception while optimizing power consumption by aligning the receiver's operational state with actual reception needs.
3Use of energy by moving object
If the receiver portion is powered down to save energy, then power consumption is reduced, but the ability to receive data promptly is compromised
Solution Approach 1:
The system performs preliminary monitoring of control channels to detect indications of upcoming data transmissions before the actual data arrives. When the control channel indicates that data is to be received, the receiver portion is powered up in advance, ensuring it is fully operational and ready to receive data immediately when it arrives. This preliminary action eliminates any delay that would otherwise occur from powering up the receiver at the last moment.
Data Source
AI summary
A method of operating a communications circuit with at least one control channel and at least one data channel includes the steps of monitoring the at least one control channel, powering a receiver portion of the circuit when the at least one control channel indicates that data is to be received, and refraining from powering the receiver portion when the at least one control channel indicates that data is not to be received. The circuit can operate, for example, under the 3GPP HSDPA standard. Where desired, the clock and power supply to the receiver portion and a bit rate processing portion can be independently gated.