Semi-Persistent Scheduling Configuration Management in 5G MBS
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Solution Overview
Problem
In wireless communication systems, there is a challenge in efficiently managing and determining whether a Semi-persistent Scheduling (SPS) configuration is specific to a user equipment (UE) or group common, particularly for Multicast Broadcast Services (MBS), as existing methods lack clear indicators for activation or deactivation, leading to unnecessary resource usage and inefficient data transmission.
Innovation Solution
The method involves using Downlink Control Information (DCI) to scramble CRC with specific Radio Network Temporary Identifiers (RNTIs) for UE-specific and group common SPS configurations, allowing UEs to determine the nature of SPS configurations and activate or deactivate accordingly, with the DCI indicating activation or release of SPS PDSCH resources, and utilizing Group Common SPS configurations to schedule transmissions for multiple services using shared RNTIs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SPS configurations are supported for both UE-specific and group common purposes, then service versatility and adaptability are improved, but configuration management complexity increases
Solution Approach 1:
The patent segments SPS configurations into two distinct types: UE-specific SPS configurations (first SPS configuration) and group common SPS configurations (second SPS configuration). Each type has its own configuration index and is managed separately through DCI with different RNTI types. This segmentation allows the system to support both individualized UE services and group multicast services simultaneously, improving service versatility while maintaining manageable complexity through clear separation of concerns.
2Measurement precision
If DCI with different RNTIs is used to indicate activation or release for different SPS configurations, then control precision and service targeting are improved, but information overhead increases
Solution Approach 1:
The patent employs a universal DCI structure that can serve multiple functions through the use of different RNTI types. The same DCI format can indicate activation or release for UE-specific SPS when scrambled with CS-RNTI, and for group common SPS when scrambled with G-RNTI. This multi-functionality approach improves control precision by using RNTI as a discrimination mechanism while avoiding the need for separate DCI formats, thereby limiting the increase in information overhead.
3Loss of energy
If group common SPS configuration is used for multicast services, then resource efficiency is improved, but individual UE customization capability is reduced
Solution Approach 1:
The patent segments service delivery into two distinct paths: group common SPS for multicast services (second SPS configuration with G-RNTI) and UE-specific SPS for individualized services (first SPS configuration with CS-RNTI). This segmentation enables the system to achieve resource efficiency through group common configurations for multicast while preserving UE-specific customization capability through the parallel UE-specific SPS configuration mechanism, thus resolving the contradiction between resource efficiency and customization capability.
Data Source
AI summary
Various embodiments of the present disclosure relate to a next-generation wireless communication system for supporting high data transfer rates beyond the 4th generation (4G) wireless communication system. According to the various embodiments, a method of transmitting and receiving signals in a wireless communication system and apparatus for supporting the same may be provided.