Receiver Micro Sleep Mode Control for Power Reduction
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Solution Overview
Problem
Current micro sleep concepts in receiver technology do not adequately reduce power consumption in mobile terminals, particularly in scenarios where the second sub-frame portion of a transmission is not needed, leading to inefficiencies in battery-operated devices.
Innovation Solution
Implementing a method that allows the receiver to enter either a regular micro sleep mode or an extended micro sleep mode based on a mode setting criterion, where the receiver component is switched off after the first sub-frame portion has been decoded, enabling a longer duration of sleep mode and potential re-transmission of the second sub-frame portion if needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the receiver component is switched off after the first sub-frame portion has been decoded (regular micro sleep mode), then power consumption is reduced, but the sleep mode duration is limited by the time needed to decode the first portion and switch the receiver off
Solution Approach 1:
The receiver component is switched off immediately after receiving the first sub-frame portion, before decoding is completed. This preliminary switching-off action extends the micro sleep mode duration by eliminating the wait time for decoding completion, while still allowing the decoded information to indicate whether the second portion needs to be received.
2Duration of action of moving object
If the receiver component is switched off immediately after the first sub-frame portion has been received (extended micro sleep mode), then the micro sleep mode duration is extended, but the risk of missing important scheduling information increases
Solution Approach 1:
The system performs preliminary decoding of the first sub-frame portion before switching off the receiver component. This preliminary action ensures that scheduling information is reliably extracted before entering extended micro sleep mode, eliminating the risk of missing critical information while maximizing sleep duration.
Solution Approach 2:
The system dynamically adjusts the micro sleep mode operation between two states: extended micro sleep mode (switching off immediately after reception) when the first portion contains complete scheduling information, and regular micro sleep mode (switching off after decoding) when additional decoding is needed. This dynamic adaptation optimizes both sleep duration and reception reliability based on actual signal conditions.
Data Source
AI summary
A technique for controlling a receiver to enter a micro sleep mode during which at least one receiver component is temporarily switched off is described. The receiver is configured to process sub-frames each having a first sub-frame portion followed by a second sub-frame portion, the first sub-frame portion carrying information indicative of whether or not the second sub-frame portion needs to be decoded. A method implementation of this technique comprises the steps of providing a regular micro sleep mode in which the receiver component is switched off after the first sub-frame portion has been decoded in case the decoding indicates that the second sub-frame portion does not need to be decoded, providing an extended micro sleep mode in which the receiver component is switched off immediately after the first sub-frame portion has been received, evaluating a mode setting criterion, and controlling the receiver to enter the regular micro sleep mode or the extended micro sleep mode depending on the mode setting criterion.