Dormant SCell BWP Configuration for Reliable Fast Activation
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Solution Overview
Problem
The mis-detection of downlink control information (DCI) signals for switching between dormant and non-dormant states in secondary serving cells (SCells) leads to inefficiencies and potential interference in carrier aggregation networks, such as increased power usage and loss of network scheduling.
Innovation Solution
Implementing mechanisms such as explicit network configuration, dormancy timers, DCI transmission repetition, and radio quality determination to manage SCell dormancy states, ensuring accurate switching between dormant and non-dormant bandwidth parts (BWPs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE uses dormant BWP for SCell to enable fast activation, then the activation speed is improved, but the reliability of DCI signal detection deteriorates
Solution Approach 1:
The network performs preliminary configuration of dormant BWP parameters and DCI monitoring settings before the UE enters dormant state. This includes pre-configuring the dormancy timer values, DCI format parameters, and search space configurations so that when DCI signals are transmitted during dormant period, the UE is already prepared with the correct detection parameters, thereby maintaining detection reliability while enabling fast activation
Solution Approach 2:
The system implements feedback mechanisms where the network monitors UE's DCI detection performance and adjusts DCI transmission parameters accordingly. When the UE is in dormant BWP, the network can adjust the aggregation level, redundancy version, or transmission timing of DCI signals based on channel conditions and historical detection accuracy, ensuring reliable state switching while maintaining fast activation capability
2Use of energy by moving object
If the UE performs reduced functionalities in dormant BWP, then the power consumption is reduced, but the network scheduling efficiency deteriorates
Solution Approach 1:
The system segments the BWP functionality into dormant and active modes with clearly defined functional boundaries. In dormant BWP, the UE performs only essential functions (DCI monitoring for state switching, minimal measurements) while non-essential functions are suspended. This segmentation allows the UE to consume less power during dormant periods while ensuring that when activation is needed, the network can efficiently schedule resources without waiting for full functionality restoration
Solution Approach 2:
The network implements periodic DCI transmissions and measurement reporting during dormant BWP periods. Instead of continuous monitoring, the UE checks for DCI signals at periodic intervals defined by the network. This periodic action reduces power consumption compared to continuous monitoring while maintaining network scheduling efficiency, as the network can align resource allocation with these periodic check points
3Measurement precision
If the DCI transmission is repeated to improve detection reliability, then the detection accuracy is improved, but the air interface resources are consumed
Solution Approach 1:
The system applies partial repetition of DCI transmissions rather than full repetition. Specifically, DCI format 1_1 or 1_2 with wake-up indicator is transmitted, and the repetition count is adjusted based on channel conditions and UE capability. This partial action provides sufficient detection accuracy for dormant BWP state switching without excessively consuming air interface resources, as the critical information (dormant/active state indication) is conveyed with minimal necessary redundancy
Data Source
AI summary
The exemplary embodiments relate to a computer readable storage medium, a user equipment, a method and an integrated circuit that perform operations. A user equipment (UE) enters into a first state including one of a non-dormant state or a dormant state with a secondary serving cell (SCell) of a network, the SCell being configured to provide either one of a non-dormant bandwidth part (BWP) as a secondary component carrier (SCC) in the non-dormant state or a dormant BWP as an SCC in the dormant state. The UE switches from the first state to a second state including the other one of the non-dormant state or the dormant state, the switch being based on network configuration, a dormancy timer, or a radio condition.