Physical Channel Scheduling for RedCap Bandwidth-Latency Conflicts
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Solution Overview
Problem
Release-18 RedCap UEs face increased processing latency and potential overlap in processing time due to their limited bandwidth capability, affecting the scheduling of uplink and downlink physical channels, particularly when handling PDSCH data exceeding 5 MHz bandwidth.
Innovation Solution
A method for determining processing durations and selecting appropriate physical channels for decoding, as well as determining sending times for physical channels to manage bandwidth exceeding the target capacity, thereby reducing latency and avoiding conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If RedCap UE processes PDSCH data with bandwidth greater than 5 MHz through multiple processing passes, then the device can handle larger bandwidth data, but the processing latency increases significantly
Solution Approach 1:
The patent segments the PDSCH processing into multiple passes, where each pass processes a portion of the bandwidth (up to 5 MHz) and accumulates results. The UE divides the total bandwidth into segments that can be processed sequentially, allowing handling of bandwidth greater than 5 MHz while managing processing latency through structured segmentation.
Solution Approach 2:
The patent applies preliminary action by performing partial processing and accumulation in advance. The UE processes available bandwidth portions first and accumulates results, then continues processing in subsequent passes. This preliminary processing reduces the impact of latency by having results ready earlier rather than waiting for complete processing.
2Reliability
If RedCap UE processes data in multiple passes with 5 MHz bandwidth each, then the device stays within its processing capability, but the processing time duration extends
Solution Approach 1:
The patent ensures continuity of useful action by implementing overlapping processing windows and continuous accumulation of processing results. The UE continuously processes data segments and accumulates results without idle gaps, maintaining productive action throughout the extended processing period while adhering to 5 MHz per-pass constraints.
3Manufacturing precision
If the UE determines processing duration based on bandwidth exceeding target bandwidth, then the scheduling accuracy improves, but the system complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the processing duration parameter based on the relationship between actual bandwidth and target bandwidth. When bandwidth exceeds target bandwidth, the system calculates and applies an extended processing duration. This parameter adjustment improves scheduling accuracy while managing complexity through a systematic approach to parameter modification.
Data Source
AI summary
Provided in the present disclosure are a physical channel receiving and sending method, a communication apparatus, and a storage medium. The physical channel receiving method comprises determining a first processing duration; determining a physical channel to be decoded from a first physical channel and a second physical channel according to the first processing duration; and decoding the physical channel to be decoded.