PDSCH-PRS Resource Mapping for Unlicensed Band Multiplexing
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Solution Overview
Problem
In future communications systems, positioning reference signals (PRS) and physical downlink shared channels (PDSCH) cannot be multiplexed on unlicensed frequency bands due to their mapping onto the same resource block (RB), leading to inefficiencies in resource utilization.
Innovation Solution
Mapping PDSCH and PRS onto different resource elements (REs), resource blocks (RBs), or orthogonal frequency division multiplexing (OFDM) symbols to enable multiplexing and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PDSCH and PRS are mapped onto the same resource block (RB) on unlicensed frequency bands, then resource utilization is simplified, but multiplexing cannot be achieved and resource efficiency deteriorates
Solution Approach 1:
The patent segments the resource block (RB) into different resource elements (REs) and applies different mapping strategies: some REs within the same RB are allocated to PDSCH while others are allocated to PRS. This segmentation enables both signals to coexist in the same RB without conflict, resolving the contradiction between mapping simplicity and resource utilization efficiency.
Solution Approach 2:
The patent applies local quality by assigning different functions to different REs within the same RB. Specifically, certain REs are designated for PDSCH transmission while other REs are designated for PRS transmission, allowing each signal to have optimal resource allocation in its designated REs while maintaining overall system efficiency.
2Quantity of substance
If PDSCH and PRS are mapped onto the same resource block (RB), then frequency resource usage is optimized, but time resource allocation becomes constrained
Solution Approach 1:
The patent resolves the contradiction by transitioning from a single-dimension (time) allocation to a two-dimension (frequency and time) allocation strategy. Within the same RB, different REs (frequency dimension) are allocated to different signals, and different OFDM symbols (time dimension) can be flexibly assigned, thereby optimizing both frequency resource usage and time resource allocation simultaneously.
3Productivity
If PDSCH and PRS are mapped onto different resource elements (REs) of the same RB, then multiplexing is enabled and resource efficiency improves, but mapping complexity increases
Solution Approach 1:
The patent manages mapping complexity through parameter changes by dynamically configuring RE allocation patterns based on system conditions. The mapping parameters (such as RE offset, RB offset, and density) can be adjusted to balance between resource efficiency and implementation complexity, allowing the system to adapt to different operational requirements.
Data Source
AI summary
An information transmission method includes: mapping a PDSCH and a positioning reference signal PRS onto different resource elements REs of a same RB; or mapping the PDSCH and the PRS onto different RBs; or mapping the PDSCH and the PRS onto different OFDM symbols; and transmitting the PDSCH and the PRS to a terminal device.