5G Downlink PDSCH Reception for Unicast and Multicast Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently handling the increasing demand for higher data rates and diverse services, particularly in mmWave bands, due to issues with propagation loss and limited transmission distances, necessitating improved technologies for beamforming, MIMO, and advanced coding and access methods.
Innovation Solution
The implementation of methods and apparatuses for receiving and processing downlink signals, including unicast and multicast/broadcast PDSCH, with dynamic scheduling and semi-persistent scheduling, and determining HARQ processes and ACK codebooks to optimize data reception and transmission in wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If mmWave bands are used to achieve higher data rates, then transmission speed is improved, but propagation loss increases and transmission distance is limited
Solution Approach 1:
The patent combines multiple PDSCH reception types (unicast and multicast/broadcast) into a single downlink signal reception framework. The terminal device is configured to receive both unicast PDSCH and multicast/broadcast PDSCH in the same downlink signal, allowing efficient utilization of mmWave resources while managing propagation loss through diversified transmission modes.
Solution Approach 2:
The patent implements dynamic scheduling for PDSCH reception where the terminal device adapts its reception configuration based on received downlink control information. The scheduling can switch between unicast and multicast/broadcast modes dynamically, allowing the system to optimize performance based on channel conditions and service requirements in mmWave environments.
2Adaptability or versatility
If diverse services are supported in 5G systems, then service versatility is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal downlink signal reception mechanism that handles multiple service types through a unified framework. The terminal device receives configuration information that enables it to process both unicast and multicast/broadcast PDSCH using the same reception architecture, reducing the need for separate handling mechanisms for different services.
Solution Approach 2:
The patent segments the downlink data into different PDSCH types (unicast and multicast/broadcast) with distinct configuration information. This segmentation allows the system to manage diverse services through organized, separate configuration sets while maintaining a unified reception process, thereby controlling system complexity through structured organization.
3Reliability
If HARQ processes are optimized for efficient data reception, then transmission reliability is improved, but processing complexity increases
Solution Approach 1:
The terminal device autonomously determines HARQ process information and ACK codebook generation based on received configuration information and downlink control information. The device self-manages the HARQ process identification and ACK timing determination without requiring explicit step-by-step control from the network, thereby improving reliability through autonomous error handling while keeping processing complexity manageable.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. An apparatus and a method performed by the same in a wireless communication system are disclosed. The method includes: receiving configuration information from a base station; and receiving a downlink signal from the base station based on the configuration information, the downlink signal including downlink data. The downlink data includes a unicast physical downlink shared channel (PDSCH) and/or a multicast/broadcast PDSCH, the unicast PDSCH includes a dynamically scheduled unicast PDSCH and/or a unicast semi-persistent scheduling (SPS) PDSCH, and the multicast/broadcast PDSCH includes a dynamically scheduled multicast/broadcast PDSCH and/or a multicast/broadcast SPS PDSCH. The present disclosure improves the efficiency of uplink or downlink transmission.