UE RTD Capability Reporting for 5G SCell Activation
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Solution Overview
Problem
Current 5G New Radio (NR) technology faces challenges in efficiently aligning the understanding of received timing difference (RTD) between network and user equipment (UE), which affects power consumption, network power saving, and SCell activation delay.
Innovation Solution
The method involves the UE transmitting its RTD capability to the base station, which then determines and configures the UE's settings based on this capability, including advanced or limited RTD configurations, to optimize measurement delays and scheduling restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits its RTD capability to the base station for configuration, then the UE configuration efficiency is improved and power consumption is reduced, but the signaling overhead and configuration complexity increase
Solution Approach 1:
The UE reports its RTD capability in advance before the base station needs to configure measurement tasks. This preliminary capability indication allows the base station to pre-determine appropriate configuration parameters, avoiding trial-and-error configuration and reducing overall system complexity while maintaining high configuration efficiency.
Solution Approach 2:
The system dynamically adjusts configuration parameters based on the UE's reported RTD capability. The base station modifies measurement delay requirements, scheduling restrictions, and other configuration parameters according to the UE's specific RTD characteristics, optimizing performance for each UE without requiring complex universal configuration mechanisms.
2Loss of energy
If advanced RTD capability is supported for better network performance, then network power saving is improved, but the UE complexity and measurement precision requirements increase
Solution Approach 1:
The system dynamically adapts the RTD configuration based on the UE's capability level. For UEs with advanced RTD capability, the system enables more sophisticated measurement configurations that improve network power saving. For UEs with limited capability, the system automatically falls back to simpler configurations, avoiding unnecessary complexity while still achieving energy efficiency.
Solution Approach 2:
The base station receives RTD capability feedback from the UE and uses this information to adjust configuration parameters accordingly. This feedback mechanism ensures that the system optimizes power saving features based on actual UE capabilities, preventing the imposition of complex requirements on devices that cannot support them.
3Loss of time
If RTD capability configuration is implemented to reduce SCell activation delay, then network response time is improved, but the signaling overhead and measurement precision requirements increase
Solution Approach 1:
The UE indicates its RTD capability in advance, allowing the base station to pre-configure optimal measurement parameters before SCell activation is needed. This preliminary capability reporting eliminates the need for time-consuming capability detection during activation, significantly reducing SCell activation delay without requiring excessive signaling overhead.
Solution Approach 2:
The system applies different configuration strategies based on the specific RTD characteristics of each UE. Rather than using a one-size-fits-all approach, the base station tailors measurement delay requirements and scheduling parameters to match each UE's specific RTD capability, optimizing activation speed for each device while minimizing unnecessary signaling complexity.
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The method may be performed by a UE. In certain configurations, the UE transmits, to a base station, a received timing difference (RTD) capability of the UE. The RTD capability indicates a RTD supported by the UE between a first cell and a timing reference cell. The UE receives, from the base station, an instruction of a configuration, which is determined according to the RTD capability of the UE. The UE performs the configuration according to the instruction. The RTD capability of the UE may include a parameter indicating the UE supporting advanced RTD capability or limited RTD capability.