Master Base Station Dual Connectivity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The dual connectivity method in mobile communication systems faces challenges in effectively managing the association between base stations to ensure stable communication, particularly in scenarios where a user terminal is connected to multiple base stations, leading to inefficiencies in resource allocation and communication control.
Innovation Solution
A communication control method that enhances dual connectivity by having the master base station receive measurement reports from user terminals, request resource additions from secondary base stations, and manage RRC reconfigurations, including notifications and cell selections to optimize the use of Physical Uplink Control Channels, thereby improving communication stability and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a user terminal simultaneously establishes connections with multiple base stations using dual connectivity method, then throughput is improved, but communication control complexity and resource allocation efficiency deteriorate
Solution Approach 1:
The patent segments the base station functions into master base station (controlling RRC connection and overall coordination) and secondary base station (providing additional radio resources). This segmentation allows the user terminal to simultaneously connect to multiple base stations for improved throughput while distributing control responsibilities to manage complexity.
Solution Approach 2:
The master base station acts as an intermediary between the user terminal and secondary base station. It receives measurement reports from the user terminal, coordinates resource allocation, and manages the addition/release of secondary cells. This intermediary role simplifies the control architecture by centralizing coordination functions at the master base station.
2Measurement precision
If measurement results are included in addition requests between base stations, then resource allocation accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The user terminal performs measurements and prepares measurement reports in advance before the base station needs to make resource allocation decisions. The measurement results are included in addition requests, allowing the receiving base station to immediately make informed decisions without requiring additional measurement procedures, thus improving allocation accuracy while managing overhead through pre-prepared data.
3Reliability
If RRC reconfiguration messages are transmitted between master base station and user terminal, then connection stability is improved, but communication latency increases
Solution Approach 1:
The patent implements a feedback mechanism where the user terminal sends measurement reports to the master base station, which then transmits RRC reconfiguration messages to adjust connections. The system continuously monitors connection status and sends reconfiguration messages only when necessary, maintaining connection stability while minimizing unnecessary communication latency through event-triggered updates rather than continuous signaling.
Data Source
AI summary
A communication control method pertaining to an embodiment of the present invention is for controlling dual connectivity communication which uses a master base station that establishes RRC connection with a user terminal and a secondary base station that provides a supplementary wireless resource to the user terminal. The communication control method comprises: a step in which the master base station receives, from the user terminal, a measurement report which includes measurement results found for each cell in the user terminal; and a step in which the secondary base station receives, from the master base station, a supplementary request for requesting the allocation of resources to the user terminal. In the step for receiving a supplementary request, the master base station includes, in the supplementary request, measurement results for a cell of the secondary base station which is included in the measurement results, and transmits the same.