Dual Connectivity Power Control for Signal Interference
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Solution Overview
Problem
Current dual connectivity technologies lack a method for effective power control across different communications modes, such as E-UTRAN and NR, leading to potential signal interference due to unmanaged power distribution between cell groups.
Innovation Solution
A power control method that determines a total guaranteed power value by combining maximum allowed transmit power values for each cell group, ensuring that the sum of powers used for sending uplink signals to both master and secondary base stations does not exceed this value, thereby preventing signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device sends uplink signals to both master base station and secondary base station simultaneously in DC state, then the communication capability and data rate are improved, but the power distribution becomes unmanageable and signal interference occurs
Solution Approach 1:
The patent introduces a new parameter PCMAX_ENDC (total guaranteed power for dual connectivity across different communications modes) that dynamically adjusts the maximum transmit power allocation between LTE and NR cell groups. This parameter change enables the terminal to manage power distribution effectively when sending uplink signals to both master and secondary base stations simultaneously, preventing signal interference while maintaining enhanced communication capability.
Solution Approach 2:
The patent implements dynamic power control by allowing the terminal to adjust its transmit power allocation between different cell groups based on real-time conditions. The network can configure different PCMAX_ENDC values through RRC signaling, enabling flexible and dynamic power management that adapts to varying channel conditions, traffic requirements, and interference scenarios, thus resolving the power distribution management issue.
2Reliability
If the terminal device increases transmit power to meet receiving requirements on the network side, then the signal quality is improved, but the power consumption increases and may cause interference to other signals
Solution Approach 1:
The patent applies local quality by allocating different power levels to different cell groups (LTE MCG and NR SCG) based on their specific requirements. Instead of uniformly increasing power across all transmissions, the terminal can selectively adjust power for specific cell groups or uplink signals, ensuring that each transmission meets its receiving requirements while minimizing unnecessary power consumption and interference to other signals.
3Adaptability or versatility
If the network configures separate maximum power values for each cell group, then the power control flexibility is improved, but the complexity of power management increases
Solution Approach 1:
The patent merges the power control mechanisms for LTE and NR cell groups by introducing a unified PCMAX_ENDC parameter that governs the total power allocation. Instead of managing completely separate power controls for each cell group, the terminal uses this combined parameter to coordinate power distribution, reducing the complexity of power management while maintaining the flexibility to adapt to different network configurations and conditions.
Data Source
AI summary
A power control method and apparatus are provided. The method includes: A communications device receives a first power value and a second power value that are configured by a network side. The first power value is a maximum allowed transmit power value that is for a first cell group and that is configured by the network side for the communications device, and the second power value is a maximum allowed transmit power value that is for a second cell group and that is configured by the network side for the communications device. The communications device determines, based on the first power value and the second power value, a total guaranteed power value that is of the communications device and that applies to a case in which a resource in the first cell group overlaps a resource in the second cell group.