PDSCH Repetition Configuration for Wireless Reliability
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Solution Overview
Problem
Current mobile communication systems face challenges in ensuring reliable reception of Physical Downlink Shared Channels (PDSCH) due to increased data traffic and the need for higher transfer rates, which affects the system's ability to maintain high energy efficiency and low latency.
Innovation Solution
A method where a user equipment (UE) transmits capability information to a base station (BS) indicating support for PDSCH repetition-related operations, receives configuration information, and repeatedly receives PDSCH based on Downlink Control Information (DCI), enabling HARQ-less or blind PDSCH repetition operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDSCH repetition operations are implemented to improve reception reliability, then the reliability of receiving PDSCH is improved, but the device complexity and signaling overhead increase due to capability information transmission and configuration management
Solution Approach 1:
The UE transmits capability information to the BS in advance, indicating support for PDSCH repetition operations. This preliminary action allows the BS to configure appropriate repetition parameters before actual data transmission, ensuring reliable reception while managing system complexity through pre-negotiated capabilities
Solution Approach 2:
The system dynamically configures PDSCH repetition operations based on UE capability and network conditions. The BS receives capability information and subsequently configures whether to enable PDSCH repetition-related operations through higher layer signaling, allowing flexible adaptation between repetition and non-repetition modes based on traffic requirements
2Reliability
If PDSCH repetition is configured to enhance reception reliability in high-traffic scenarios, then the reliability and transfer rate are improved, but the latency increases due to multiple reception opportunities
Solution Approach 1:
The system implements partial repetition by configuring a specific number of repetition occasions based on traffic requirements. Instead of always using maximum repetitions, the BS configures an optimal number of repetitions that provides sufficient reliability while minimizing latency, applying the principle of doing just enough repetition needed for reliable reception
3Adaptability or versatility
If the UE transmits capability information and receives configuration signals for PDSCH repetition, then the adaptability and performance are improved, but the signaling overhead and energy consumption increase
Solution Approach 1:
The capability information transmission mechanism is designed to be universal, allowing the UE to indicate support for various PDSCH repetition-related operations through a single capability message. This multi-functional approach enables the system to adapt to different repetition scenarios (different numbers of repetitions, different time intervals) without requiring separate signaling for each case, reducing overall signaling overhead and energy consumption
Data Source
AI summary
Disclosed are a method of transmitting and receiving a physical downlink shared channel in a wireless communication system and an apparatus supporting the method. More specifically, the method performed by a user equipment may comprise transmitting, to a base station (BS), capability information including first information indicating support for a PDSCH repetition-related operation; receiving, from the BS, an higher layer signal including second information for configuring whether to enable the PDSCH repetition-related operation; receiving Downlink Control Information (DCI) related to reception of a PDSCH repetition from the BS when the second information is configured as enable; and receiving the PDSCH repeatedly from the BS based on the DCI.