Logical-Channel Mapping for CU-DU Multicast-to-Unicast Communication
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Solution Overview
Problem
There is no related technology to specifically implement transmitting a multicast service in a unicast manner in a CU-DU architecture, which is necessary for efficient resource utilization in 5G communication systems.
Innovation Solution
A method is provided to transmit multicast services in a unicast manner by associating multicast service information with logical channels through interaction between the CU and DU, enabling flexible transmission of multicast services in a CU-DU architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multicast service is transmitted using traditional multicast mechanisms, then network resource utilization is improved, but adaptability to CU-DU architecture is insufficient
Solution Approach 1:
The patent implements dynamic transmission mode selection for multicast services, allowing the system to flexibly switch between multicast and unicast transmission based on service requirements and network conditions. The CU can dynamically configure DUs to use appropriate transmission modes, making the system adaptable to the CU-DU architecture while maintaining efficient resource utilization.
Solution Approach 2:
The patent enables the CU-DU architecture to support both traditional multicast transmission and unicast transmission through a unified configuration mechanism. The CU can configure multiple DUs with different transmission modes, making the system universally applicable to various service scenarios and architecture configurations.
2Adaptability or versatility
If multicast service is transmitted in a unicast manner, then adaptability to CU-DU architecture is improved, but device complexity increases
Solution Approach 1:
The CU acts as an intermediary that centralizes the configuration and management of multicast service transmission. It generates and sends configuration information to multiple DUs, coordinating their transmission modes and parameters. This intermediary approach simplifies the overall system complexity by providing centralized control while enabling flexible unicast transmission at the DU level.
Solution Approach 2:
The patent segments the multicast service transmission function between CU and DU, with the CU responsible for configuration and control, and DUs responsible for actual transmission execution. This segmentation allows each component to have focused, simpler functionality while achieving complex overall behavior through their coordination.
3Area of stationary object
If multiple DUs are configured for multicast service, then transmission coverage is improved, but information consistency becomes difficult to maintain
Solution Approach 1:
The patent implements a feedback mechanism where the CU sends configuration information to multiple DUs, and DUs report their configuration status and service information back to the CU. The CU uses this feedback to maintain consistent configuration across all DUs, ensuring information consistency while expanding transmission coverage through multiple DUs.
Data Source
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AI summary
This application provides a method for multicast communication, a first network device, and a second network device. The method includes: A first network device sends first information to a second network device, where the first information indicates an association relationship between multicast service information and a first terminal device; the first network device receives second information from the second network device; the first network device generates a configuration message based on the second information, where the configuration message indicates an association relationship between the multicast service information and a first logical channel, and the first logical channel is a logical channel of the first terminal device; and the first network device sends the configuration message to the first terminal device. Through interaction between the first network device and the second network device, the first network device may determine an association relationship between multicast service information and a logical channel of a terminal device, and may send the association relationship to the terminal device, so that a multicast service can be transmitted in a unicast manner based on the association relationship, thereby implementing flexible transmission of the multicast service.