Common PDSCH Scheduling for RedCap Bandwidth and TBS Limits
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Solution Overview
Problem
Existing 5G RedCap terminals face challenges in handling baseband processing bandwidth and transmission block size (TBS) limitations of common PDSCH due to reduced capabilities, leading to inefficiencies in data handling and lack of effective scheduling solutions.
Innovation Solution
A scheduling method that allows RedCap terminals to adjust their receiving mode based on transmission resource parameters of the common PDSCH, including methods to abandon, partially receive, or demodulate data within capability limits, using thresholds and data padding to optimize data handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RedCap terminals use common PDSCH for data reception, then resource utilization is improved, but the terminal cannot handle the baseband processing bandwidth and TBS due to reduced capabilities
Solution Approach 1:
The patent applies local quality by configuring different transmission resource parameters for different terminal types. RedCap terminals receive common PDSCH with adjusted parameters (such as reduced baseband processing bandwidth and TBS limits) that match their specific capabilities, while other terminals receive standard configurations. This allows each terminal type to receive data at an appropriate quality level matching its processing capabilities.
Solution Approach 2:
The patent changes physical parameters of the common PDSCH transmission by introducing transmission resource parameters that adjust baseband processing bandwidth, TBS, and other physical layer parameters. These parameter changes enable the common PDSCH to be adapted to RedCap terminals' reduced capabilities while maintaining resource sharing efficiency.
2Reliability
If RedCap terminals process common PDSCH within capability limits, then data reception reliability is improved, but processing efficiency and data handling speed deteriorate
Solution Approach 1:
The patent applies partial action by having RedCap terminals process only the portion of common PDSCH that falls within their capability limits. The transmission resource parameters are configured to match terminal capabilities, so terminals process partial data volumes that are manageable within their reduced processing power, ensuring reliable reception without overwhelming the terminal.
3Measurement precision
If differential adjustment of receiving modes is implemented, then scheduling accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies universality by using a unified common PDSCH transmission mechanism that serves multiple terminal types simultaneously. The same common PDSCH resource is shared across different terminal types, with differential reception handled through parameter configuration rather than separate transmission mechanisms. This maintains system simplicity while enabling precise differential scheduling.
Data Source
AI summary
A method and system for scheduling and receiving a common physical downlink shared channel (PDSCH) between an access network device and a first-type terminal, such as an enhanced reduced capability (eRedCap) terminal, is disclosed. The terminal determines the receiving mode of the common PDSCH based on a transmission resource parameter, such as baseband processing bandwidth or transmission block size, allocated by the access network device. The terminal selectively receives or stops receiving the common PDSCH depending on whether the transmission resource parameter aligns with its terminal capabilities. In cases where the resource exceeds the terminal's capability, the terminal may receive a portion of the common PDSCH based on a resource allocation range indicated by a physical downlink control channel (PDCCH).