DU Interface Signaling for Real-Time 5G Spectrum Sharing
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving real-time dynamic spectrum sharing due to limited procedures and information elements, leading to time delays and difficulties in interworking between base stations with different core networks.
Innovation Solution
The implementation of direct interfaces between distributed units (DUs) for real-time dynamic spectrum sharing (DSS) through signaling and information exchange, including identification information on cells, to facilitate efficient spectrum sharing between base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional spectrum sharing procedures are used between base stations with different core networks, then system compatibility is maintained, but time delays increase and real-time dynamic spectrum sharing becomes difficult to achieve
Solution Approach 1:
The base station is segmented into distributed units (DUs) that can independently perform spectrum sharing operations. Each DU contains the necessary functionality to manage spectrum resources locally, enabling real-time decisions without waiting for centralized coordination, thus reducing time delays while maintaining system reliability.
Solution Approach 2:
The system implements dynamic spectrum sharing where DUs can flexibly allocate and reallocate spectrum resources based on real-time conditions. The interface between DUs enables adaptive modulation and coding, allowing the system to dynamically adjust to changing spectrum availability and traffic conditions without significant time delays.
2Adaptability or versatility
If limited procedures and information elements are used for spectrum sharing, then system complexity is reduced, but interworking between base stations becomes difficult and real-time coordination is impaired
Solution Approach 1:
The DU interface is designed as a universal communication mechanism that handles multiple functions including spectrum sharing, handover coordination, and real-time resource allocation. This multi-functional interface simplifies the overall system by consolidating various coordination tasks into a single standardized protocol, improving interworking capability without proportionally increasing complexity.
Solution Approach 2:
The DU interface acts as an intermediary mechanism that facilitates communication between distributed units with different core networks. It provides standardized information elements and procedures that enable seamless interworking, allowing DUs to coordinate spectrum sharing decisions without requiring complex direct interactions between diverse network elements.
3Productivity
If direct DU interfaces are implemented for real-time spectrum sharing, then time delays are reduced and real-time coordination is enabled, but interface complexity and signaling overhead increase
Solution Approach 1:
The critical real-time spectrum sharing functionality is extracted from the centralized unit and placed in the distributed units. This extraction enables local decision-making and eliminates the need for complex centralized coordination procedures, improving productivity while the standardized DU interface manages the complexity of inter-unit communication through predefined protocols.
Data Source
AI summary
The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system such as long term evolution (LTE). A method performed by a distributed unit (DU) in a wireless communication system is provided. The method may include transmitting, to another node supporting a second cell that shares a frequency band of a specified range with a first cell of the base station, a message including information related to spectrum sharing via a DU interface, wherein the information related to the spectrum sharing includes identification information on the first cell and identification information on the second cell.