Frequency Partition Control for Low-Latency Open RAN Cells
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Open RAN systems, terminal devices at cell boundaries often fail to meet low-latency requirements due to inter-cell interference, and existing techniques struggle to efficiently allocate radio resources across neighboring cells without causing latency or deteriorating radio efficiency.
Innovation Solution
A radio allocation device and control device system that partitions radio resources into frequency sections based on measurement results, allowing for optimized allocation of resources for different services like URLLC and eMBB, thereby reducing inter-cell interference and enhancing responsiveness to field events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio resources are allocated without frequency partitioning in Open RAN systems, then device complexity is reduced and ease of operation is improved, but terminal devices at cell boundaries experience inter-cell interference and fail to meet low-latency requirements
Solution Approach 1:
The available frequency spectrum is divided into multiple frequency partitions, where certain partitions are designated for URLLC services and others for eMBB services. This segmentation allows terminal devices at cell boundaries to receive URLLC transmissions on interference-free frequency partitions, thereby meeting low-latency requirements without requiring complex interference coordination across all frequencies.
Solution Approach 2:
Different frequency partitions are assigned different service qualities: some partitions provide high-reliability low-latency service for URLLC, while others provide high-throughput service for eMBB. This local quality differentiation ensures that terminal devices at cell boundaries can access appropriate service quality on specific frequency partitions without affecting overall system complexity.
2Loss of time
If frequency partitioning is implemented to reduce inter-cell interference, then latency performance is improved, but radio efficiency may deteriorate due to resource allocation overhead and signaling
Solution Approach 1:
Frequency partitions are pre-configured and pre-designated for specific service types (URLLC or eMBB) before actual resource allocation. This preliminary action eliminates the need for complex real-time interference coordination and signaling during resource allocation, thereby reducing latency while maintaining radio efficiency. The partitioning structure is established in advance, allowing rapid resource assignment without overhead.
3Reliability
If measurement-based scheduling is used to curb interference, then reliability of low-latency communication is improved, but device complexity and signaling overhead increase
Solution Approach 1:
Instead of performing complex interference measurements and coordinated scheduling across all frequency resources, the system segments the frequency spectrum into dedicated partitions. Terminal devices simply identify and access URLLC partitions without needing to measure or coordinate with neighboring cells, significantly reducing device complexity and signaling overhead while maintaining interference control reliability.
Data Source
AI summary
A communication system includes: a radio allocation device configured to allocate a radio resource; and a control device configured to control the radio allocation device, wherein the radio allocation device is further configured to transmit a measurement result including measurement relating to wireless quality, the control device is further configured to: determine, according to the measurement result, a use of each of a plurality of partitions, the plurality of partitions being divided from an available frequency, and notify, to the radio allocation device, information regarding the use of each of the plurality of partitions and frequency partition information regarding the plurality of partitions, and the radio allocation device is further configured to control a frequency use section in a cell subordinate to the radio allocation device in accordance with the frequency part information.