Dynamic CORESET Configuration for UE Power Reduction
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently managing control resource sets (CORESETs) and search spaces for user equipment (UEs), particularly for reduced capability devices with high uplink traffic and large latency tolerance, where sparsely configured search spaces lead to unnecessary downlink traffic and increased power consumption.
Innovation Solution
User equipment (UE) requests configuration, activation, or deactivation of control resource sets (CORESETs) and associated search spaces dynamically, allowing for on-demand scheduling based on uplink traffic, reducing the need for frequent downlink monitoring and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If sparsely configured search spaces are used for reduced capability devices, then device complexity and power consumption are reduced, but downlink traffic efficiency deteriorates due to unnecessary downlink transmissions
Solution Approach 1:
The patent implements dynamic search space configuration where the network can activate or deactivate specific search space sets based on uplink traffic conditions. This allows the system to adapt between sparse configuration (for power saving) and dense configuration (for traffic efficiency) in real-time, resolving the contradiction between power consumption and downlink traffic efficiency
Solution Approach 2:
The patent changes the configuration parameters of search spaces dynamically by receiving UE requests and adjusting the number of search space occasions, periodicity, and other parameters. This enables the system to optimize both power consumption and downlink traffic efficiency by matching configuration density to actual traffic needs
2Productivity
If frequently configured search spaces are used, then downlink traffic efficiency is improved, but UE power consumption increases due to frequent monitoring requirements
Solution Approach 1:
The system dynamically adjusts search space configuration based on actual traffic conditions rather than using fixed frequent configuration. The network receives UE requests indicating uplink traffic needs and activates appropriate search space sets, ensuring efficient downlink communication only when necessary, thereby reducing unnecessary power consumption
Solution Approach 2:
The patent implements periodic search space occasions with configurable intervals. Instead of continuous monitoring, UEs monitor search spaces at periodic intervals defined by the configuration, which reduces power consumption while maintaining downlink traffic efficiency through optimized periodic monitoring cycles
3Adaptability or versatility
If dynamic CORESETs with predefined search space occasions are used, then resource allocation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent segments the control resource set configuration into multiple search space sets, each with specific purposes and configurations. This segmentation allows the UE to process only relevant search space sets based on traffic conditions, reducing overall processing complexity while maintaining resource allocation flexibility through selective activation
Solution Approach 2:
The system implements partial configuration where not all search space sets are activated simultaneously. Only the necessary subset of search space sets is configured and activated based on current traffic needs, reducing UE processing complexity while maintaining the flexibility to activate additional sets when required
Data Source
AI summary
A method of wireless communications by a user equipment (UE) includes transmitting a request for action for at least one control resource set (CORESET) and associated search space. The action may include configuring, activating, and/or deactivating the at least one CORESET and associated search space. The CORESET may be a dynamic CORESET with a predefined number of search space occasions or a semi-static CORESET. The method also includes communicating in accordance with the request. The request is transmitted using at least one of an uplink radio resource control (RRC) message, a physical uplink control channel (PUCCH), a sounding reference signal (SRS), a random access channel (RACH), or a physical uplink shared channel (PUSCH). The UE may switch, in connection with the request, to a bandwidth part (BWP) configured for the UE.