UE Power Control for LTE-NR Coexistence
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Solution Overview
Problem
The coexistence of 5G New Radio (NR) and Long Term Evolution (LTE) technologies in mobile telecommunications systems faces challenges due to intermodulation distortion issues, particularly in frequency bands where simultaneous uplink transmissions lead to performance degradation, necessitating improved power control mechanisms to manage intermodulation products and ensure reliable communication.
Innovation Solution
The implementation of a user equipment (UE) and base station circuitry that detects coexistence indications and transmits power control instructions to manage output power, allowing for single or simultaneous uplink transmissions based on detected intermodulation issues, using signaling methods such as power headroom messages, user equipment capability signaling, and measurement reports to optimize radio resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous uplink transmissions in LTE and NR are performed in certain frequency bands, then radio resource utilization is improved, but intermodulation distortion occurs causing performance degradation
Solution Approach 1:
The patent implements dynamic power control mechanisms where the base station adjusts uplink power allocations for LTE and NR transmissions based on detected intermodulation conditions. The system transitions from static power settings to dynamic adjustment, using power control instructions to modify transmit powers in response to measured intermodulation products, thereby maintaining simultaneous transmissions while mitigating distortion effects
Solution Approach 2:
The patent changes the power parameters of uplink transmissions by transmitting power control instructions to user equipment. The base station measures intermodulation products and adjusts the power levels of LTE and NR uplink signals accordingly, modifying transmission parameters to eliminate harmful intermodulation while preserving the benefits of simultaneous transmissions
2Object-affected harmful factors
If power control instructions are transmitted to manage output power, then intermodulation distortion is mitigated, but signaling complexity increases
Solution Approach 1:
The patent reuses existing uplink power control signaling mechanisms and measurement report structures for their original purposes while simultaneously using them to convey intermodulation mitigation information. The power control instructions serve dual functions: traditional power management and intermodulation product control, thereby reducing the need for separate dedicated signaling channels
Solution Approach 2:
The system uses the existing power control feedback loops and measurement reporting mechanisms to automatically detect and respond to intermodulation conditions. The base station leverages already-available uplink power control infrastructure to manage intermodulation distortion without requiring additional complex signaling protocols or external intervention
Data Source
AI summary
The present disclosure pertains to a user equipment for a mobile telecommunications system includes circuitry including a receiver and a transmitter and which is configured to communicate with a new radio base station and a LTE base station. The circuitry is further configured to indicate a co-existence indication to the new radio base station or to the LTE base station; and receive a power control instruction for controlling power output of the transmitter.