FDM PDSCH Scheduling for Unicast and Group-Common Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for wireless data communication services and the exponential growth of connected devices in 5G networks require improved methods for efficient data transmission and reception, particularly in higher frequency bands, to address challenges such as propagation loss and transmission distance, while supporting diverse services like augmented reality and ultra-low latency communications.
Innovation Solution
The implementation of a terminal and base station system that supports the transmission and reception of physical downlink shared channels (PDSCHs) using unicast and multicast scheduling, utilizing advanced technologies like beamforming, massive MIMO, and AI-based communication to optimize system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher frequency bands are used for data transmission, then transmission rates are improved, but propagation loss increases and transmission distance decreases
Solution Approach 1:
The patent combines unicast and multicast PDSCH transmissions into a single unified reception process. The terminal receives multiple scheduled PDSCHs (including both unicast and multicast types) in one operation, merging what would otherwise be separate reception operations. This reduces the number of individual processing steps and improves overall reception efficiency, helping to offset the propagation losses inherent in high-frequency transmissions.
Solution Approach 2:
The patent employs semi-persistent scheduling (SPS) for both unicast and multicast PDSCHs, where scheduling decisions are made in advance and configured beforehand. This preliminary action eliminates the need for continuous dynamic scheduling signaling, reducing overhead and improving transmission efficiency. By pre-configuring resource allocations, the system optimizes data transmission at high frequencies where every bit of overhead impacts overall performance.
2Adaptability or versatility
If multiple PDSCHs are received simultaneously, then service diversity is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal reception mechanism that handles both unicast and multicast PDSCHs through the same processing path. The terminal's receiving unit is designed to universally process multiple types of PDSCHs (unicast, multicast, and their semi-persistent variants) using a single unified approach, rather than requiring separate specialized receivers for each type. This multi-functional design reduces device complexity while maintaining the ability to support diverse services.
Solution Approach 2:
The patent segments the reception of multiple PDSCHs into independently configurable components. Each PDSCH (unicast or multicast) can be individually scheduled and configured through separate DCI messages, allowing the terminal to process them in an organized manner. The segmentation of scheduling control from data reception enables the terminal to handle service diversity systematically, managing complexity through structured organization rather than monolithic processing.
3Duration of action of moving object
If dynamic scheduling is used for all PDSCHs, then transmission flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent implements semi-persistent scheduling (SPS) for both unicast and multicast PDSCHs, where resources are allocated periodically based on pre-configured parameters rather than through continuous dynamic signaling. The gNB configures SPS parameters in advance, and transmissions occur at predetermined intervals without requiring individual DCI messages for each PDSCH. This periodic action dramatically reduces signaling overhead compared to purely dynamic scheduling, while maintaining sufficient transmission flexibility for time-sensitive services.
Solution Approach 2:
The patent provides dynamic configurability of SPS parameters through higher-layer signaling, allowing the system to adapt between more dynamic and more static scheduling behaviors based on service requirements. The SPS configuration can be adjusted to provide different degrees of flexibility - from highly periodic transmissions for steady-state services to more dynamically adjustable patterns for time-sensitive applications. This dynamic parameter configuration enables the system to optimize the trade-off between signaling overhead and transmission flexibility according to specific service needs.
Data Source
AI summary
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. The method includes transmitting, to a base station, user equipment (UE) capability information indicating that the UE supports a frequency division multiplexing (FDM) between a unicast physical downlink shared channel (PDSCH) and a group-common PDSCH in a slot and receiving, from the base station, a first PDSCH that is the unicast PDSCH and a second PDSCH that is the group-common PDSCH, which are FDMed in the slot based on the UE capability information.