X2 Gateway Base Station Selection for Dual Connectivity
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Solution Overview
Problem
The existing dual connectivity methods in mobile communication systems lack a defined process for smoothly integrating a home base station as a secondary base station, leading to inefficiencies and potential failures in resource allocation and communication.
Innovation Solution
A network apparatus and base station configuration that collects operational status information of multiple secondary base stations, prioritizes them based on load and mode of operation, and sends addition requests to determine the most suitable secondary base station for resource allocation, ensuring efficient communication and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual connectivity is implemented without a defined process for integrating home base stations, then additional radio resources can be provided to user terminals, but resource allocation becomes inefficient and addition procedures may fail
Solution Approach 1:
The network apparatus collects operation information from multiple second base stations in advance (before the addition request is processed). This preliminary collection of operational status data enables the network apparatus to make informed decisions about which second base station to select, preventing addition failures and improving resource allocation efficiency.
Solution Approach 2:
The network apparatus uses operation information (feedback about base station operational status) to determine the most suitable second base station for adding to the dual connectivity configuration. This feedback mechanism ensures that addition decisions are based on current operational conditions, improving both reliability and efficiency.
2Quantity of substance
If multiple second base stations are available for dual connectivity, then more radio resources can be allocated, but determining the most suitable base station becomes complex
Solution Approach 1:
The network apparatus acts as an intermediary between the first base station and multiple second base stations. It collects operation information from second base stations, processes this information along with measurement results, and determines the most suitable second base station. This intermediary role simplifies the selection process by centralizing the decision-making logic in the network apparatus rather than requiring complex coordination between all base stations.
Solution Approach 2:
The network apparatus changes the parameter of base station selection from arbitrary or simple round-robin to selection based on operation information parameters (such as operational status, load conditions, etc.). By using measurable parameters to guide the selection, the system can efficiently manage multiple second base stations without excessive complexity.
3Reliability
If the network apparatus collects operation information from multiple second base stations, then the most suitable base station can be determined, but signaling overhead increases
Solution Approach 1:
The network apparatus collects operation information from second base stations in advance, before the actual addition procedure is triggered. This preliminary collection allows the information to be cached and reused when addition requests occur, reducing the signaling overhead during actual addition operations while maintaining high reliability in base station selection.
Data Source
AI summary
In a dual connectivity, the X2-GW collects operation information from a plurality of HeNBs. The X2-GW obtains a measurement result of radio quality reported by the UE to the MeNB from the MeNB. Based on the operation information of the HeNB and the measurement result, the X2-GW identifies transmission destination of a SeNB addition request message received from the MeNB, and sends the SeNB addition request message to the identified HeNB. Upon acquiring an acknowledgment message for the SeNB addition request message from the HeNB, the X2-GW sends the message to the MeNB.