Primary Secondary Cell Change in Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In carrier aggregation systems, the reliability of primary secondary cells can degrade due to user equipment movement, leading to inefficient communication as existing methods do not effectively adjust primary secondary cells in real-time to maintain signal quality and resource allocation.
Innovation Solution
A method where a primary base station determines and selects a new primary secondary cell based on signal quality measurements, allocates physical uplink control channels, and derives security keys, while communicating with the secondary base station to facilitate seamless switching for the user equipment, thereby improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a primary secondary cell is used for carrier aggregation, then data transmission capacity is improved, but communication reliability deteriorates as user equipment moves and signal quality degrades
Solution Approach 1:
The patent implements dynamic primary secondary cell adjustment by allowing the network to reconfigure which secondary cell serves as the primary secondary cell based on real-time signal quality measurements. This dynamic reconfiguration enables the system to maintain reliable communication by adapting to user equipment movement while preserving the high data transmission capacity provided by carrier aggregation.
2Productivity
If primary secondary cell adjustment is implemented, then communication efficiency is improved, but system complexity increases due to additional signaling and coordination requirements
Solution Approach 1:
The patent introduces a dedicated primary secondary cell adjustment mechanism that acts as an intermediary between the primary cell and secondary cells. This adjustment mechanism coordinates cell reconfiguration through standardized signaling procedures, managing the complexity of real-time primary secondary cell changes while improving communication efficiency through optimized resource allocation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Embodiments of the present invention disclose a primary secondary cell change method and a base station, which relate to the communications field, and can adjust a primary secondary cell in a process of carrier aggregation, thereby improving the communication efficiency. The primary secondary cell change method in the embodiments of the present invention includes: determining, by a primary base station, to change a first primary secondary cell served by a secondary base station, and selecting a second primary secondary cell from cells served by the secondary base station; sending, by the primary base station, a first message to the secondary base station, which is used to request the secondary base station to change the primary secondary cell, where the first message includes an identity of the second primary secondary cell; and sending, by the primary base station, a second message to a user equipment UE, which is used to request the UE to use the second primary secondary cell.