Master-Node Frequency Selection for Stable Dual Connectivity
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Solution Overview
Problem
Existing cellular communication systems face instability and congestion issues due to fluctuations in wireless communication environments, particularly with mobile base station relays and integrated access and backhaul nodes, leading to unreliable connections and reduced communication speeds.
Innovation Solution
A communication apparatus operates as a master node, selecting a different frequency band for secondary connectivity to stabilize communication by avoiding interference and congestion, utilizing frequency selection units and transmission units to manage dual connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same frequency band is used for both access line and backhaul line in IAB, then wireless resource utilization is improved, but communication reliability deteriorates due to interference and congestion
Solution Approach 1:
The patent segments the frequency spectrum into different bands for access and backhaul communications. The access line uses a first frequency band while the backhaul line uses a second frequency band, preventing interference between the two types of communication and improving overall reliability.
Solution Approach 2:
The patent changes the frequency parameter to resolve the contradiction. By selecting different frequency bands for access and backhaul lines, the system maintains efficient resource utilization while eliminating the interference and congestion that would occur if the same band was used for both purposes.
2Reliability
If dual connectivity is implemented with the same frequency band for both nodes, then connection redundancy is improved, but communication speed deteriorates due to congestion
Solution Approach 1:
The patent segments frequency bands between master and secondary nodes in dual connectivity. The master node uses a first frequency band while the secondary node uses a second frequency band, allowing redundant connections without mutual congestion, thus maintaining both reliability and speed.
3Area of stationary object
If mobile base station relay is deployed to improve coverage, then area coverage is improved, but connection stability deteriorates due to environment fluctuations
Solution Approach 1:
The patent employs frequency band selection as a stabilizing parameter. By choosing appropriate frequency bands for mobile base station relays operating in fluctuating environments, the system maintains connection stability while preserving extended area coverage capability.
Data Source
AI summary
A method of providing a communication function as a master node based on dual connectivity includes performing first selection processing of selecting a base station in a second frequency band as a secondary node base station to be used for communication with an UE, performing second selection processing of selecting, in a case where a first frequency band is used with the UE, and a base station in the second frequency band that is higher than the first frequency band is not present and a base station in the first frequency band is present in a surrounding area that are base stations which satisfy a criterion, the base station in the first frequency band as a secondary node base station to be used for communication with the UE, and transmitting an S-NODE ADDITION REQUEST to the base station selected by the first selection processing or the second selection processing.