Wireless Device Signaling to Reduce Control-Channel Monitoring Power
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Solution Overview
Problem
The rapid growth of wireless communications has led to increased power consumption in wireless devices, which affects user experience and system performance, particularly in scenarios where devices are not configured with discontinuous reception (DRX) or are in active time, leading to high power consumption due to constant monitoring of physical downlink control channels.
Innovation Solution
Implementing power-saving techniques through different signaling or indications based on the device's state, such as DRX-on or DRX-off, using downlink control information (DCI) with wake-up indicators, bandwidth part indicators, and MIMO layer adjustments to reduce unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices continuously monitor physical downlink control channels, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic monitoring of control channels through DRX mechanisms, where devices switch between active and inactive states rather than continuous monitoring. This allows the device to maintain communication reliability during active periods while significantly reducing power consumption during inactive periods, directly resolving the contradiction between reliability and energy usage.
Solution Approach 2:
The patent extracts the power-saving function from the continuous monitoring process by introducing separate wake-up indicators and control information that can be selectively received. This allows the device to maintain essential communication functionality while removing the energy-intensive continuous monitoring operation, thereby reducing power consumption without sacrificing critical reliability.
2Use of energy by moving object
If devices operate in power-saving states, then power consumption is reduced, but system response time increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring wake-up indicators and control information before the device enters power-saving state. This allows the device to quickly transition from inactive to active state without delay, as the necessary control parameters are already prepared and waiting, thus minimizing response time loss while maintaining power-saving benefits.
Solution Approach 2:
The patent implements feedback mechanisms through wake-up indicators that provide timely information about incoming control information. This feedback allows the device to efficiently manage its state transitions, waking up only when necessary and quickly returning to sleep mode, thereby optimizing the balance between power consumption and response time.
3Loss of energy
If control information includes detailed wake-up indicators, then power-saving effectiveness is improved, but signaling complexity increases
Solution Approach 1:
The patent applies local quality by providing different levels of detail in control information based on specific conditions. Rather than always including maximum detail, the system adjusts the granularity of wake-up indicators and control parameters locally according to the device state and communication requirements, reducing overall signaling complexity while maintaining power-saving effectiveness where needed.
Solution Approach 2:
The patent uses partial action by including only the necessary wake-up indicators and control information fields required for power-saving operation, rather than transmitting complete control information always. This selective inclusion reduces signaling complexity while maintaining sufficient power-saving effectiveness, avoiding the excessive complexity of full-detail signaling in all scenarios.
Data Source
AI summary
Methods, systems, and devices for signaling to reduce power consumption of wireless devices are described. An example method for wireless communication includes transmitting, by a network node to a wireless device in communication with the network node, a control information that is based on the wireless device being in a power-normal state or not being configured to operate in a power-saving state. Another example method for wireless communication includes receiving, by a wireless device from a network node, a control information that is based on the wireless device being in a power-normal state or not being configured to operate in a power-saving state.