Downlink DRX Configuration Switching for UE Power Saving
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Solution Overview
Problem
The increasing demand for high data throughput and diverse communication services in wireless networks has led to a need for enhanced mobile broadband (eMBB) communication, massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), while also necessitating network energy conservation and power saving for user equipment (UEs) and the network.
Innovation Solution
Implementing methods and procedures for receiving and transmitting downlink signals that utilize synchronization signal blocks (SSBs) and discontinuous reception (DRX) configurations, including multiple configurations associated with different resources in the frequency, time, spatial, and power domains, to optimize network energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous downlink signal monitoring is performed to ensure reliable communication and high data throughput, then communication reliability and data rate are improved, but network energy consumption and UE power consumption increase
Solution Approach 1:
The patent implements discontinuous reception (DRX) configurations that enable periodic monitoring of downlink signals instead of continuous monitoring. The UE alternates between active periods where it monitors PDCCH and sleep periods where it reduces power consumption, while still maintaining communication reliability through scheduled periodic checks at configured intervals.
Solution Approach 2:
The patent introduces multiple DRX configurations that can be dynamically selected and applied based on current network conditions and service requirements. The gNB can switch between different DRX configurations to adaptively balance between power saving and communication reliability, allowing the system to respond dynamically to changing traffic patterns and service demands.
2Adaptability or versatility
If multiple DRX configurations are implemented to provide flexible power saving options, then energy conservation capability is improved, but system complexity increases
Solution Approach 1:
The patent segments the power saving mechanism into multiple distinct DRX configurations, each with specific parameters and characteristics. This segmentation allows the system to offer diverse power saving options without creating a monolithic complex system, as each configuration can be independently managed and selected based on specific needs.
Solution Approach 2:
The patent pre-configures multiple DRX configurations in advance, with each configuration optimized for specific scenarios. This preliminary preparation reduces runtime complexity by eliminating the need for real-time configuration creation, as the system only needs to select from pre-defined options rather than dynamically generate new configurations.
3Loss of time
If frequent PDCCH monitoring is performed to ensure low latency communication, then latency is reduced, but network energy consumption increases
Solution Approach 1:
The patent applies periodic monitoring through DRX configurations where the gNB and UE perform PDCCH monitoring at predetermined intervals rather than continuously. This periodic approach maintains low latency by ensuring regular communication checks while significantly reducing network energy consumption during idle periods when no data transmission is occurring.
Solution Approach 2:
The patent utilizes different DRX configuration parameters (such as drx-OnDuration, drx-SlotOffset, and drx-HARQ-RTT-Timer) to adjust the monitoring frequency and timing. By dynamically changing these parameters, the system can optimize the balance between latency requirements and energy consumption based on current traffic conditions and service priorities.
Data Source
AI summary
A plurality of DRX configurations associated with each of different resources with respect to at least one from among frequency, time, space and power domain can be provided to a UE by means of a BS. If the BS indicates one of the plurality of DRX configurations, the BS and the UE can operate using the frequency, time, space, or power domain resources associated with the indicated DRX configuration.