Frequency Band Switching for Carrier Aggregation Optimization
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Solution Overview
Problem
In mobile communications systems employing carrier aggregation (CA), the CA capability of terminals is often limited, leading to suboptimal CA implementation and user experience due to differences in CA capabilities between primary and secondary frequency bands, resulting in inadequate bandwidth utilization and user experience.
Innovation Solution
A frequency band processing method where a base station obtains and analyzes CA capability information to determine if the terminal should switch from a primary frequency band to a secondary frequency band, sending a switching instruction to optimize the access frequency band for better CA performance, thereby improving bandwidth utilization and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal uses the primary frequency band for initial access, then the access process is simple and fast, but the CA capability is limited and bandwidth utilization is insufficient
Solution Approach 1:
The patent implements dynamic frequency band switching by allowing the terminal to transition from the primary frequency band to the secondary frequency band based on CA capability matching. The network device configures the terminal to initially access via the primary band for fast access, then dynamically switches to the secondary band when better CA capabilities are identified, thus optimizing both access time and bandwidth utilization at different stages
Solution Approach 2:
The patent changes the operating frequency band parameter from a static configuration to a dynamic one. The terminal initially operates in the primary frequency band for quick access, then the network device instructs the terminal to switch to the secondary frequency band where the CA capability matches better, thereby improving bandwidth utilization without permanently compromising access speed
2Quantity of substance
If the terminal switches to the secondary frequency band to improve CA capability, then bandwidth utilization improves, but the access complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure the terminal with both primary and secondary frequency band information before the terminal actually needs to switch. The network device identifies the more suitable secondary frequency band in advance and provides the terminal with the necessary configuration information, so that when switching is needed, the terminal can transition smoothly without complex real-time decision-making
Solution Approach 2:
The network device acts as an intermediary that manages the frequency band switching process. Instead of the terminal independently determining when and how to switch bands (which would increase terminal complexity), the network device monitors CA capability matching and instructs the terminal to switch bands, thereby reducing terminal complexity while achieving optimal bandwidth utilization
3Adaptability or versatility
If the CA capability of the terminal is limited in multi-band overlapping scenarios, then the terminal can operate in more frequency bands, but optimal CA combination cannot be implemented
Solution Approach 1:
The patent applies local quality by matching the terminal's specific CA capability characteristics with the appropriate frequency band. Instead of forcing the terminal to use a fixed frequency band regardless of capability matching, the network device evaluates the terminal's CA capabilities and directs the terminal to the frequency band (primary or secondary) where the capability matching is optimal, thereby ensuring reliable CA implementation while maintaining frequency band adaptability
Solution Approach 2:
The patent implements dynamic frequency band selection based on CA capability evaluation. The network device continuously assesses whether the terminal's CA capability matches the current frequency band configuration and dynamically switches the terminal between primary and secondary frequency bands to maintain optimal CA implementation quality, thus resolving the contradiction between adaptability and reliability
Data Source
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AI summary
A frequency band processing method and apparatus are provided. The method includes: obtaining, by a base station, CA capability information of a terminal (S701); determining, by the base station based on the CA capability information, that an access frequency band of the terminal is to be switched from a primary frequency band to a secondary frequency band (S702); and sending, by the base station, a switching instruction to the terminal, where the switching instruction is used to instruct the terminal to switch the access frequency band from the primary frequency band to the secondary frequency band (S703). According to the method, after switching, the terminal can obtain a better frequency band combination and achieve a better CA effect, so that larger bandwidth can be obtained and user experience is improved.