Master Base Station Mediator for IDC Interference Management
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Solution Overview
Problem
In C/U Split scenarios of LTE networks, communication problems such as interference occur due to the user communication device maintaining its control-plane connection with the macro base station, limiting the ability to apply existing IDC procedures effectively across multiple base stations, requiring complex signaling and often resulting in incomplete or incorrect IDC configuration settings.
Innovation Solution
The implementation of a secondary base station device and a master base station device with enhanced control modules to facilitate counter check procedures, bearer management, and multimedia broadcast/multicast service handling through improved communication interfaces and data transmission protocols, allowing for direct communication and coordination between the user device and multiple base stations to manage IDC situations and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the user communication device maintains control-plane connection with the macro base station only, then the control plane management is simplified, but the ability to apply IDC procedures effectively across multiple base stations is limited and complex signaling is required
Solution Approach 1:
The patent segments the base station functionality into master base station (handling control plane) and secondary base station (handling user plane and IDC procedures). This segmentation allows the control plane to remain simple while enabling the secondary base station to independently execute IDC procedures without requiring complex inter-base-station signaling.
Solution Approach 2:
The user communication device acts as an intermediary that receives IDC configuration settings from the secondary base station via the master base station, and applies these settings locally. This eliminates the need for direct complex signaling between base stations while maintaining effective IDC procedure application.
2Object-affected harmful factors
If existing IDC procedures are applied in C/U Split scenarios, then interference management is attempted, but complex signaling is required and configuration settings are often incomplete or incorrect
Solution Approach 1:
The master base station serves as an intermediary that transparently forwards IDC configuration settings from the secondary base station to the user communication device. This mediator approach simplifies signaling by eliminating the need for complex direct communication between secondary base station and user device, while ensuring complete and correct configuration delivery.
Solution Approach 2:
The master base station performs multiple functions: it maintains control plane connectivity, forwards user plane data, and relays IDC configuration settings. This multi-functionality allows the system to manage interference effectively without requiring separate dedicated signaling paths, reducing overall signaling complexity.
3Productivity
If the user communication device uses separate radio connections via macro base station and low-power node, then the load in the macro cell is reduced, but the node handling control-plane and user-plane are separated requiring complex coordination
Solution Approach 1:
The patent implements C/U split by segmenting the base station roles: macro base station (master) handles control plane functions while low-power node (secondary) handles user plane functions. This segmentation reduces macro cell load by offloading user data traffic to the secondary base station while maintaining simple control plane management through the master base station.
Solution Approach 2:
The master base station acts as an intermediary that forwards control messages and IDC configuration settings between the secondary base station and the user communication device. This intermediary function simplifies coordination between the separated control and user plane nodes, eliminating the need for complex direct coordination protocols.
Data Source
AI summary
A system is provided in which a user device communicates control data with a first base station and communicates user data with a second base station. The user device receives, from the first base station, configuration data specific to the first base station and configuration data specific to the second base station for configuring the user device to handle in-device coexistence interference. When the user device detects interference, it identifies the base station to which the interference relates, and controls the operating of its transceiver circuitry: i) using the first base station specific configuration data if it identifies that the interference is related to the first base station; and ii) using the second base station specific configuration data if it identifies that the interference is related to the second base station.