Uplink Power Control for Dual Connectivity in LTE Networks
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Solution Overview
Problem
In heterogeneous wireless communication networks, especially in LTE systems with dual connectivity, the existing power control mechanisms fail to ensure sufficient uplink transmit power for simultaneous transmission to both macro and micro eNodeBs, leading to suboptimal performance and reduced peak rates due to the lack of ideal backhaul links and inefficient resource allocation.
Innovation Solution
The proposed solution configures minimum guaranteed transmit powers for both Primary and Secondary Cells, allowing for power scaling and allocation based on specific conditions, ensuring that the total transmit power meets certain constraints, thereby optimizing energy utilization and spectrum efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the user accesses multiple eNBs at the same time in dual connectivity mode, then the peak rate and spectrum efficiency are improved, but the uplink transmit power becomes insufficient for simultaneous transmission to both macro and micro eNodeBs
Solution Approach 1:
The patent segments the uplink transmit power into two distinct parts: a first uplink transmit power for transmission to the macro eNodeB and a second uplink transmit power for transmission to the micro eNodeB. This segmentation allows the terminal to allocate power resources specifically for each eNodeB type, ensuring sufficient power is available for simultaneous dual connectivity transmissions while maintaining overall power management efficiency.
2Use of energy by moving object
If the existing power control mechanism is used without segmentation, then the system complexity is low, but the energy utilization becomes inefficient in dual connectivity scenarios
Solution Approach 1:
The patent implements dynamic power control by allowing the network to independently adjust the first uplink transmit power for macro eNodeB and the second uplink transmit power for micro eNodeB based on varying channel conditions, traffic requirements, and network load. This dynamic adjustment mechanism optimizes energy utilization in dual connectivity scenarios while maintaining manageable system complexity through structured power control parameters.
Data Source
AI summary
The present disclosure provides a method for controlling uplink power, comprising: determining, by a Main eNodeB (MeNB), configured maximum transmit power P_MeNB of a User Equipment (UE) in a Primary Cell (PCell) and configured maximum transmit power P_SeNB of the UE in a Secondary Cell (SCell); notifying, by the MeNB, P_SeNB to a Secondary eNodeB (SeNB) corresponding to the SCell; and notifying P_MeNB and P_SeNB to the UE. The present disclosure further provides corresponding base station and UE.