CU-DU Resource Indication for Synchronous MBMS Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In New Radio (NR) systems, the performance of MBMS service at the cell edge is poor due to inadequate synchronization of content transmissions between adjacent cells, which affects the reliability of data transmission.
Innovation Solution
A method and device for resource indication are introduced, where a Centralized Unit (CU) sends first indication information to a Distributed Unit (DU) to configure the location of radio resources for MBMS service data, enabling synchronous transmission between cells by ensuring that the same MBMS service data is sent at the same location of the indicated radio resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronous content transmissions between cells are not implemented, then the complexity of resource coordination is low, but the reliability of MBMS service data transmission at cell edge is poor
Solution Approach 1:
The patent introduces a CU-DU separation architecture where the CU acts as an intermediary to coordinate MBMS resource allocation across multiple DUs. The CU receives MBMS service data and generates first indication information containing resource location details, which is then distributed to relevant DUs. This intermediary mechanism enables synchronous content transmission between cells without requiring direct complex coordination between all DUs, thus improving reliability while managing complexity through hierarchical control.
2Reliability
If first indication information is sent from CU to DU to configure radio resource location, then synchronous transmission between cells is achieved, but the signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by having the CU pre-generate and distribute first indication information containing radio resource location configurations to DUs before MBMS service data transmission begins. This advance configuration allows DUs to be pre-aligned on resource allocation patterns, enabling synchronous transmission without requiring continuous real-time signaling during data transmission, thus reducing ongoing signaling overhead while maintaining synchronization reliability.
Data Source
AI summary
A resource indication method and device, and a communication apparatus are provided. The method comprises: a distributed unit (DU) receiving first indication information sent by a centralized unit (CU), the first indication information indicating a location of a radio resource for multimedia broadcast multicast service (MBMS) data.