Coordinated Power Control for Multi-Connectivity Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In dual connectivity scenarios, wireless devices simultaneously connected to multiple access points face challenges in managing uplink power, as independent power control algorithms can lead to uncoordinated power levels, making it difficult for the device to support both links with requested power levels, resulting in potential power limitations and scheduling issues.
Innovation Solution
A method where network nodes determine and manage separate maximum transmit power values for each contemporaneous link, allowing for coordinated power control across multiple wireless access points to ensure the wireless device does not exceed its total allowed transmit power, enabling independent scheduling of uplink cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If independent power control algorithms are used for each link in dual connectivity, then each link can be controlled independently, but the wireless device cannot support both links with requested power levels due to uncoordinated power levels
Solution Approach 1:
The patent introduces a coordinating entity (network controller or base station) that acts as an intermediary between multiple power control algorithms. This intermediary receives power requests from different links, calculates coordinated power levels that satisfy total power constraints, and distributes the coordinated power allocations back to individual links, thereby resolving the contradiction between independent control and coordinated power levels.
Solution Approach 2:
The patent transitions from one-dimensional independent power control to multi-dimensional coordinated power control by introducing an additional coordination layer. This new dimension allows the system to simultaneously satisfy individual link power requirements while adhering to the overall device power constraint, enabling support for multiple links with requested power levels.
2Reliability
If separate maximum transmit power values are determined for each link, then coordinated power control is enabled, but network node complexity increases
Solution Approach 1:
The patent segments the power control function into separate modules for each link while maintaining a central coordination mechanism. Each network node handles its own link's power control independently but communicates with the coordinating entity to ensure overall coordination. This segmentation reduces the complexity burden on individual network nodes while maintaining system-wide power control coordination.
3Reliability
If the wireless device transmits at high power levels to support multiple links, then link performance improves, but the device exceeds its total allowed transmit power
Solution Approach 1:
The patent dynamically adjusts power allocation parameters for each link based on channel conditions, link priorities, and total power constraints. By changing power distribution parameters rather than using fixed high power levels, the system achieves good link performance while staying within the device's total allowed transmit power through optimized power allocation across multiple links.
Data Source
Figure 1a~1c
Figure 2~4
Figure 5~7
AI summary
A network node, a wireless device and methods therein are provided for handling transmit power control for contemporaneous links related to multi-connectivity. A method in a network node involves obtaining a separate maximum transmit power value for a wireless device per contemporaneous link; and transmitting at least one of the obtained maximum transmit power values to another network node, thereby enabling the other network node to control the transmit power of the wireless device for a link corresponding to at least one of the obtained maximum transmit power values