Uplink Power Control in Dual Connectivity Cell Groups
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Solution Overview
Problem
In dual connectivity environments, User Equipment (UE) faces challenges in distributing limited transmission power across multiple base stations for simultaneous transmission of uplink signals, lacking a standard method to determine optimal power allocation for various types of signals, which hinders high-capacity data processing at high speeds.
Innovation Solution
A method and apparatus for controlling uplink transmission power by configuring dual connectivity, determining maximum transmission power for each cell group, and using indicators for simultaneous transmission of channels and signals, allowing UE to transmit effectively across multiple cell groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a UE transmits uplink signals to multiple base stations in dual connectivity environment, then data transmission capacity and speed are improved, but transmission power distribution becomes complex and unreliable
Solution Approach 1:
The patent segments the dual connectivity system into multiple cell groups (first cell group and second cell group), where each cell group is independently controlled with its own maximum transmission power parameters. This segmentation allows the UE to manage power distribution separately for each base station group, resolving the complexity of unified power management while maintaining high data transmission capacity across multiple base stations.
2Manufacturing precision
If maximum transmission power is determined for each cell group, then power allocation precision is improved, but device complexity increases
Solution Approach 1:
The base station performs preliminary configuration by determining and indicating the maximum transmission power for each cell group before the UE actually transmits uplink signals. This advance power indication simplifies the UE's power control complexity, as the device only needs to follow the pre-configured power parameters for each cell group rather than performing complex real-time power calculations.
Data Source
AI summary
The present disclosure relates to a method and an apparatus for allocating or controlling transmission power when a User Equipment (UE) transmits uplink signals. More particularly, the present disclosure relates to a method and an apparatus capable of multiplexing uplink channels or signals from identical base station (e.g., eNB) or between different base stations when the UE transmits various kinds of channels or signals to an uplink in a dual connectivity environment for transmission to or reception from different base stations. The present disclosure provides a method of controlling uplink transmission power by an UE. The method may include determining a maximum uplink transmission power with respect to each cell group of multiple cell groups each including at least one of serving cells, and transmitting uplink channels and uplink signals of each of the multiple cell groups using a maximum uplink transmission power of each one of the multiple cell groups.