Downlink Control Information Reception for Wireless Power Saving
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Solution Overview
Problem
Current wireless communication systems face challenges in optimizing power saving operations in wireless devices and base stations, particularly in multicarrier communication systems, where efficient resource management and dynamic adaptation to transmission conditions are needed to enhance performance and reduce energy consumption.
Innovation Solution
The implementation of advanced radio access network architectures and protocols, including dynamic modulation and coding schemes, bandwidth part management, and multi-connectivity configurations, enables efficient power saving operations by optimizing resource allocation and adapting to changing radio conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous monitoring of downlink control information is performed to maintain reliable communication, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic adaptation by switching between different monitoring modes based on communication conditions. The wireless device transitions from continuous monitoring to discontinuous monitoring or wake-up signal based monitoring when conditions allow, enabling the system to maintain reliability while reducing power consumption during stable communication periods.
Solution Approach 2:
The patent employs periodic monitoring instead of continuous monitoring by using discontinuous reception (DRX) cycles and wake-up signals. The device monitors downlink control information at specific periodic intervals rather than continuously, which significantly reduces power consumption while maintaining adequate communication reliability through appropriately tuned monitoring periods.
2Use of energy by moving object
If discontinuous reception is used to save power, then power consumption is reduced, but communication reliability may deteriorate
Solution Approach 1:
The patent uses wake-up signals as a preliminary action before requiring full downlink control information monitoring. The wake-up signal serves as an early indicator that prepares the device to transition from low-power state to active monitoring state, ensuring that the device is ready to receive and process subsequent control information reliably while minimizing the time spent in high-power state.
Solution Approach 2:
The patent implements feedback mechanisms where the network signals the device through wake-up signals or pre-emption indicators when downlink control information is available. This feedback loop allows the device to maintain discontinuous reception for power saving while reliably detecting and responding to actual communication needs, thus maintaining communication reliability.
3Productivity
If multiple component carriers are monitored simultaneously to enhance data throughput, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent segments the monitoring of multiple component carriers by applying different monitoring strategies to different carriers based on their importance and traffic characteristics. Primary carriers receive continuous or frequent monitoring while secondary carriers use discontinuous monitoring or wake-up signal based approaches, reducing overall device complexity while maintaining high data throughput through optimized multi-carrier operation.
Solution Approach 2:
The patent applies different quality levels of monitoring to different component carriers based on local requirements. Critical carriers with high reliability requirements use continuous monitoring while less critical carriers use power-saving monitoring modes. This local differentiation allows the system to achieve high aggregate throughput across multiple carriers without uniformly increasing device complexity for all carriers.
Data Source
AI summary
A method may include receiving, by a wireless device, a first downlink control information (DCI) indicating an uplink grant or a downlink assignment of a bandwidth part (BWP) of a cell. The method may also include starting, based on the first DCI, a BWP inactivity timer of the cell. The method may further include receiving a second DCI comprising a dormancy indication of the cell. Based on the second DCI, the method may include the wireless device stopping the BWP inactivity timer of the cell, as well as transmitting channel state information reports for a second BWP of the cell.