DU Spectrum Sharing via Direct Signaling
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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, particularly in scenarios involving different core networks and base stations, leading to time delays and difficulties in efficient spectrum utilization.
Innovation Solution
The implementation of direct interfaces and signaling between distributed units (DUs) for dynamic spectrum sharing (DSS) in a wireless communication system, enabling real-time coordination and resource management across CUs and DUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic spectrum sharing is implemented between base stations with different core networks, then spectrum utilization efficiency is improved, but time delays occur due to limited coordination procedures
Solution Approach 1:
The base station is segmented into a centralized unit (CU) and a distributed unit (DU). The CU handles high-layer protocols and resource coordination, while the DU handles physical layer operations and real-time spectrum sharing. This segmentation allows the DU to perform rapid spectrum coordination with other base stations' DUs, reducing time delays while maintaining efficient spectrum utilization.
2Speed
If direct interfaces and signaling between distributed units are implemented, then real-time spectrum coordination is achieved, but system complexity increases
Solution Approach 1:
The CU-DU interface acts as an intermediary that manages the complexity of direct DU-to-DU signaling. The CU handles high-layer resource coordination and generates coordination messages, which are then transmitted between DUs through standardized interfaces. This intermediary approach enables real-time spectrum coordination while containing system complexity within manageable boundaries.
3Productivity
If centralized unit and distributed unit separation structure is used, then spectrum sharing performance is maximized, but infrastructure complexity increases
Solution Approach 1:
The base station infrastructure is segmented into CU and DU functional units that can be deployed independently. The CU can be co-located or remotely deployed, while the DU is deployed at the radio access point. This segmentation allows operators to deploy spectrum sharing capabilities incrementally and reduces overall infrastructure complexity compared to requiring full base station upgrades.
Solution Approach 2:
The CU-DU separation creates a universal architecture where the CU can serve multiple DUs and the DU can support multiple radio access technologies. This multi-functionality allows a single CU to manage spectrum sharing across multiple cells and technologies, reducing the need for dedicated infrastructure for each function and thereby reducing overall complexity.
Data Source
Figure 1~2a
Figure 2b
Figure 3a
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). According to various embodiments of the present disclosure, an apparatus operated by a distributed unit (DU) of a base station in a wireless communication system, comprises at least one transceiver and at least one processor. The at least one processor controls the at least one transceiver to transmit, via a DU interface, a message including information related to spectrum sharing to another node supporting a second cell that shares, with a first cell of the base station, a frequency band in a specified range. The information related to the spectrum sharing may include identification information regarding the first cell and identification information regarding the second cell.