Sounding Reference Signal Configuration Across DRX States for Power Saving
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing power consumption and efficiency, particularly in managing power saving states and resource allocation for wireless devices and base stations, which can lead to suboptimal performance and increased energy usage.
Innovation Solution
Implementing advanced power saving operations and resource management techniques, including SRS-based power saving mechanisms, DRX operations, and BWP switching, to optimize power consumption and resource allocation in wireless devices and base stations, enhancing efficiency and reducing energy waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices and base stations operate continuously to maintain optimal performance, then communication quality is improved, but power consumption increases
Solution Approach 1:
The patent implements Discontinuous Reception (DRX) operations where wireless devices periodically wake up to monitor control channels and then return to sleep mode. This periodic action allows the device to maintain communication readiness while significantly reducing power consumption during idle periods, directly resolving the contradiction between continuous operation quality and energy usage
Solution Approach 2:
The patent employs dynamic Bandwidth Part (BWP) switching that adapts the operating bandwidth based on current communication requirements. When high data rates are needed, wider BWPs are activated; during low-activity periods, narrower BWPs or sleep modes are used. This dynamic adjustment optimizes performance while minimizing power consumption across varying operational states
2Productivity
If resource allocation is optimized for peak performance, then data transmission efficiency is improved, but power consumption during low activity increases
Solution Approach 1:
The patent implements dynamic BWP configuration where the bandwidth allocated to a wireless device is adjusted in real-time based on traffic requirements. During peak data transmission, wider BWPs provide high throughput; during low activity, the system switches to narrower BWPs or deactivates them entirely, preventing energy waste while maintaining the capability for high-speed transmission when needed
Solution Approach 2:
The system changes operational parameters (bandwidth, subcarrier spacing, cyclic prefix length) by switching between different BWP configurations. These parameter changes allow the system to adapt resource allocation to match actual traffic demands, optimizing data transmission efficiency during high activity while minimizing energy consumption during low activity periods
3Measurement precision
If SRS transmission is performed frequently for channel estimation, then channel state information accuracy is improved, but uplink power consumption increases
Solution Approach 1:
The patent implements periodic Sounding Reference Signal (SRS) transmission where the wireless device transmits SRS at configured intervals rather than continuously. This periodic transmission maintains sufficient channel state information accuracy for network scheduling decisions while significantly reducing uplink power consumption compared to continuous SRS transmission
Solution Approach 2:
The system transmits SRS with just sufficient frequency and power to obtain adequate channel state information for effective scheduling, rather than using excessive transmission resources. This partial action approach achieves the necessary measurement precision while minimizing unnecessary uplink power consumption
Data Source
AI summary
A wireless device receives one or more radio resource control (RRC) messages comprising configuration parameters indicating: a first configuration of first sounding reference signals (SRSs) used in a first state in which the wireless device monitors first search spaces of control channels associated with a shared data channel to determine whether data is scheduled for the wireless device, a second configuration of positioning SRSs used in a second state, different from the first state, for monitoring the control channels, first bandwidth part (BWP) configuration of a first BWP for the first state, and second BWP configuration of a second BWP for the second state. The wireless device transmits the first SRSs in the first state and via first bandwidth part (BWP) of a cell. The wireless device transmits the positioning SRSs in the second state and via the second BWP of the cell.