eRedCap Terminal Multi-Slot PDSCH/RAR Processing for Reduced Bandwidth
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Solution Overview
Problem
Existing communication systems face degradation in throughput when eRedCap UEs conform to the 3GPP NR standard of Rel. 17 or earlier versions using a reduced bandwidth compared to RedCap UEs.
Innovation Solution
The terminal and base station are designed to handle communication using a narrower bandwidth by processing downlink shared channels across multiple slots, enabling appropriate communication through repetitions or decoding, and handling uplink channels accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a reduced bandwidth is used for eRedCap UEs, then device complexity is reduced, but communication throughput degrades
Solution Approach 1:
The patent segments the downlink reception process into multiple slots, where the terminal receives PDSCH transmissions containing RAR across different time slots. This temporal segmentation allows the terminal to accumulate sufficient data throughput despite using a reduced bandwidth configuration, effectively resolving the contradiction between limited bandwidth capability and required communication throughput.
2Device complexity
If bandwidth for data channel is reduced, then peak data rate decreases, but BB section complexity is reduced
Solution Approach 1:
The patent employs preliminary action by transmitting the RAR message across multiple downlink slots before the terminal needs to respond with uplink data. This allows the terminal to receive and process the complete RAR information gradually over time, reducing the instantaneous processing burden on the BB section while still achieving the required peak data rate when needed.
Data Source
AI summary
A terminal includes a processing section, and a communication section that receives, from a base station, system information including information for configuring an initial downlink bandwidth part (BWP) and receives, from the base station, a physical downlink shared channel (PDSCH) including a random access response (RAR) in a random access procedure, in the initial downlink BWP. When the PDSCH including the RAR is received in a wider bandwidth than a bandwidth of a certain number of physical resource blocks (PRBs), the processing section performs, based on a time relationship between reception of the PDSCH including the RAR and transmission of a corresponding physical uplink shared channel (PUSCH), and a parameter of a time resource for the transmission of the PUSCH, processing of the transmission of the PUSCH.