Dual-Connectivity Node Selection Using Group Delay Variation
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Solution Overview
Problem
In wireless communication systems, high group delay variation across different carriers can lead to signal distortions and reduced throughput, particularly in dual-connectivity scenarios where communications occur across a range of frequencies, affecting the quality and reliability of air-interface communication between access nodes and user equipment (UEs).
Innovation Solution
The master node (MN) in a dual-connectivity setup considers the group delay variation of potential secondary nodes (SNs) to decide whether to establish dual-connectivity service and selects the SN with lower group delay variation for improved communication quality, thereby optimizing the configuration of dual-connectivity service by choosing the access node with better signal characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual-connectivity service is established across multiple carriers, then data rate and service quality are improved, but group delay variation increases causing signal distortion and throughput reduction
Solution Approach 1:
The patent applies parameter changes by measuring and comparing group delay variation values of different carriers, then selecting the carrier with acceptable group delay characteristics for dual-connectivity service. This changes the selection criterion from merely signal strength to including signal quality parameters, thereby resolving the contradiction between achieving high data rate through multi-carrier connectivity and maintaining signal quality by avoiding high group delay variation carriers.
2Productivity
If dual-connectivity service is configured with multiple access nodes, then communication capacity is enhanced, but configuration complexity increases
Solution Approach 1:
The patent simplifies the configuration process by introducing automated group delay measurement and comparison mechanisms. The system automatically measures group delay variation for candidate carriers, compares these parameters, and makes selection decisions based on predefined thresholds, thereby reducing the manual configuration complexity while maintaining enhanced communication capacity through dual-connectivity.
Data Source
AI summary
When a first access node is considering setup of dual-connectivity service for a UE, the first access node could take into consideration a group delay variation of each of one or more candidate second access nodes, in order to decide whether to set up the dual-connectivity service for the UE and/or to decide which of the multiple second access nodes to use for the UE's dual-connectivity service. For instance, the first access node may decide to use a given candidate second access node for the dual-connectivity service of the UE, with the decision being based on the given candidate second access node having a lower group delay variation than one or more other candidate second access nodes.