CU-DU MBS Resource Coordination to Reduce Inter-DU Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Resource allocation for multicast-broadcast services (MBS) in a wireless communication system, particularly in a CU-DU split RAN, is a challenge due to the need for coordinated resource management across multiple distributed units (DUs) to minimize interference and ensure efficient transmission.
Innovation Solution
A central unit (CU) in the wireless communication system receives resource information from DUs, determines common resources for multicast or broadcast transmission based on device location and number, and transmits this information to the DUs for coordinated resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resource allocation is performed independently by each DU, then device complexity is reduced, but interference coordination between DUs deteriorates
Solution Approach 1:
The CU acts as an intermediary between DUs for resource allocation. The CU receives resource allocation requests from multiple DUs, coordinates the allocation to minimize interference, and distributes coordinated resource allocation information back to DUs. This mediator approach resolves the contradiction by centralizing coordination functions while allowing DUs to maintain relatively simple execution roles.
2Object-affected harmful factors
If centralized resource allocation is performed by CU, then interference coordination is improved, but device complexity increases
Solution Approach 1:
The resource allocation function is segmented between CU and DU with clear division of responsibilities. The CU handles high-level coordination and interference management, while DUs handle local resource execution and reporting. This segmentation reduces the complexity burden on individual components while maintaining centralized coordination benefits.
3Productivity
If common resources are allocated for multicast-broadcast service, then transmission efficiency is improved, but resource flexibility for other services deteriorates
Solution Approach 1:
The resource allocation system dynamically adjusts between common resource allocation for MBS and dedicated resource allocation for other services based on service requirements and network conditions. The CU can flexibly reconfigure resource allocation patterns, transitioning resources from MBS to other services when needed, thus maintaining both transmission efficiency for MBS and overall system flexibility.
Data Source
AI summary
The present disclosure relates to resource allocation in wireless communications. According to various embodiments, a method performed by a central unit (CU) in a wireless communication system comprises: receiving, from one or more distributed units (DUs), resource information on radio resources for a multicast-broadcast service (MBS) service allocated by the one or more DUs; determining to perform a multicast or broadcast transmission of the MBS service to wireless devices based on a location of the wireless devices and a number of the wireless devices; determining common resources for the multicast or broadcast transmission of the MBS service to be used by the one or more DUs based on the resource information received from the one or more of DUs; and transmitting, to the one or more DUs, information for the common resources for the multicast or broadcast transmission of the MBS service.