Shared Base Station Dormant Mode and Dual Connectivity
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Solution Overview
Problem
The challenge is to effectively utilize a specific frequency band shared by multiple mobile network operators or communication systems in mobile communication systems, as this band is not available for primary use by a single operator, posing difficulties in mobile communication.
Innovation Solution
A mobile communication system with a shared base station that performs backhaul communication via an inter-base station interface, utilizing a dormant mode when the frequency band is unavailable and supporting dual connectivity to provide additional radio resources, allowing simultaneous communication with both a general and specific base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a specific frequency band shared by multiple mobile network operators is used for mobile communication, then the utilization of shared frequency resources is improved, but the reliability of communication is worsened due to the presence of primary users and potential interference
Solution Approach 1:
The base station dynamically transitions between active and dormant modes based on the availability of the specific frequency band. When primary users are detected or interference occurs, the base station switches to dormant mode, suspending mobile communication in the specific frequency band while maintaining backhaul communication. This dynamic adaptation resolves the contradiction by adjusting system state according to real-time conditions.
Solution Approach 2:
The system changes operational parameters by switching between different communication modes (active/dormant) and utilizing dual connectivity with master and secondary base stations. This parameter change allows the system to maintain reliability by falling back to alternative communication paths when the specific frequency band becomes unreliable.
2Productivity
If a base station is shared by multiple mobile network operators to comply with increasing traffic demands, then the productivity of the communication system is improved, but the device complexity is worsened due to the need for multiple interfaces and connectivity management
Solution Approach 1:
The specific base station is designed with multi-functionality, serving multiple mobile network operators simultaneously through a single infrastructure. It implements both mobile communication functions in the specific frequency band and backhaul communication functions through the inter-base station interface, eliminating the need for separate base stations for each operator and thereby reducing overall system complexity.
Solution Approach 2:
The patent merges multiple communication functions into a single base station entity. The specific base station combines mobile communication capabilities for multiple operators with backhaul communication capabilities, consolidating what would traditionally require multiple separate base stations into one unified device, thus improving productivity while managing complexity through integration.
3Quantity of substance
If dual connectivity is implemented to provide additional radio resources, then the quantity of available resources is improved, but the device complexity is worsened due to simultaneous communication with multiple base stations
Solution Approach 1:
The dual connectivity function is segmented into distinct roles: a master base station for primary communication and control, and a secondary base station for additional radio resources. This segmentation allows the user terminal to manage multiple connections systematically, with clear division of responsibilities, thereby reducing the perceived complexity while increasing available resources.
Solution Approach 2:
The master base station acts as an intermediary that coordinates the dual connectivity arrangement. It manages the RRC connection and coordinates with the secondary base station, simplifying the overall communication management for the user terminal by providing a central point of control rather than requiring direct management of multiple independent connections.
Data Source
AI summary
A LTE system comprises a eNB 200-2 that is a eNB shared by a plurality of network operators, and that performs LTE communication with a UE in a specific frequency band of which primary use is not allowed by the plurality of network operators. The specific eNB 200-2 performs backhaul communication with a eNB 200-1 provided in each mobile LTE network 1 of the plurality of network operators, via an inter-eNB interface 600.