Terminal PDSCH Resource Allocation for Synchronization Signal Protection
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Solution Overview
Problem
In the context of LTE and next-generation mobile communication systems like New Radio (NR), there is a challenge in effectively managing resources for Physical Downlink Shared Channel (PDSCH) and Hybrid Automatic Repeat Request (HARQ) acknowledgments (ACK) in cellular communication systems, particularly in scenarios requiring enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC).
Innovation Solution
The solution involves a terminal apparatus and method where the PDSCH is allocated to specific resources other than those used for Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) blocks, with HARQ-ACK information transmitted on the Physical Uplink Control Channel (PUCCH). The allocation is determined by a higher layer parameter, ensuring effective communication by optimizing resource usage and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDSCH resources are allocated to include SS/PBCH block resources, then resource utilization increases, but communication reliability deteriorates due to potential interference with synchronization signals
Solution Approach 1:
The patent segments the resource allocation by introducing a higher layer parameter that divides SS/PBCH block resources into protected resources and non-protected resources. The terminal apparatus is configured to exclude only the protected segment from PDSCH allocation, while allowing non-protected segments to be used for data transmission, thus achieving partial resource utilization without compromising synchronization signal integrity
Solution Approach 2:
The patent applies local quality by differentiating the treatment of different SS/PBCH block resources through the higher layer parameter configuration. Certain SS/PBCH block resources are marked as protected with specific bit values while others are marked as non-protected, allowing PDSCH to be allocated to non-protected resources locally without affecting the overall synchronization function
2Reliability
If PDSCH is allocated to resources other than SS/PBCH blocks, then communication reliability improves, but resource utilization deteriorates due to wasted resources
Solution Approach 1:
The patent recovers previously wasted SS/PBCH block resources by allowing PDSCH allocation to non-protected SS/PBCH resources. The higher layer parameter identifies which SS/PBCH resources can be discarded for data transmission (non-protected) while maintaining protection for critical synchronization resources, thus converting wasted resources into usable data transmission resources
3Device complexity
If HARQ-ACK timing is fixed, then processing complexity decreases, but adaptability deteriorates for different communication scenarios
Solution Approach 1:
The patent introduces dynamics to the HARQ-ACK timing mechanism by allowing the timing relationship to be flexibly determined based on the scheduled PDSCH resources and the configured higher layer parameter. The terminal apparatus dynamically selects the appropriate PUCCH transmission timing based on the actual resource allocation and the protected/non-protected SS/PBCH configuration, enabling adaptation to different communication scenarios without excessive complexity
Data Source
AI summary
A terminal apparatus that includes: a receiving portion for receiving a PDSCH including a transport block; and a transmitting portion for transmitting, on a PUCCH, HARQ-ACK information corresponding to the transport block. The PDSCH is allocated to first resources other than second resources. The second resources are used for one or more SS/PBCH blocks when an nth bit of a higher layer parameter is set to a specific value. The nth bit corresponds to the one or more SS/PBCH blocks, where each of the one or more SS/PBCH blocks has a first index corresponding to (n−1). The first index is determined by a remainder acquired by dividing a second index by a value indicated by a PBCH in each of the one or more SS/PBCH blocks. The second index is notified based on at least a reference signal of the PBCH in each of the one or more SS/PBCH blocks.