SPS PDSCH Scheduling During Inter-Frequency Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR systems, when the receiver bandwidth of user equipment (UE) is insufficient to cover both the carrier frequency of the serving cell and neighboring cells, downlink data reception is interrupted during inter-frequency signal measurement, leading to increased latency and potential handover delays.
Innovation Solution
Implementing a method where the UE prioritizes downlink communication with the serving cell by configuring semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) resources with high priority, allowing it to continue data reception during measurement windows, and adjusting the measurement strategy based on time thresholds to minimize interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE stops receiving downlink data to perform inter-frequency signal measurement, then measurement accuracy is improved, but downlink data transmission latency increases
Solution Approach 1:
The patent applies dynamics by making the receiver bandwidth configuration adaptive rather than static. The UE dynamically switches between different receiver bandwidth configurations based on whether downlink data is scheduled during measurement windows. When data is scheduled, the UE uses a first receiver bandwidth configuration that enables simultaneous reception of serving cell data and inter-frequency measurement signals. When no data is scheduled, the UE uses a second receiver bandwidth configuration optimized for measurement accuracy. This dynamic adaptation resolves the contradiction by allowing the system to optimize for measurement accuracy when needed while maintaining data transmission continuity when possible.
2Device complexity
If the UE uses insufficient receiver bandwidth to cover both serving cell and inter-frequency cell, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the receiver bandwidth into multiple configurable bandwidth parts (BWPs). Instead of requiring a single large bandwidth that can simultaneously cover both serving cell and inter-frequency cell measurements, the UE is configured with multiple smaller BWPs that can be selectively activated. The first BWP is optimized for data reception while the second BWP is optimized for measurement. This segmentation allows the UE to achieve measurement precision comparable to having a large continuous bandwidth while maintaining lower device complexity through the use of multiple smaller, manageable bandwidth segments.
3Loss of time
If the UE continues downlink data reception during measurement windows, then data transmission latency is reduced, but measurement accuracy deteriorates
Solution Approach 1:
The patent applies local quality by assigning different quality characteristics to different frequency resources within the receiver bandwidth. Specifically, the UE is configured to receive downlink data from the serving cell on certain frequency resources while simultaneously performing inter-frequency measurements on other frequency resources. The first receiver bandwidth configuration is optimized for data reception quality, while the second configuration is optimized for measurement quality. This local differentiation of quality allows the system to maintain both data transmission continuity and measurement accuracy by ensuring that each function operates on resources with appropriate quality characteristics.
Data Source
Figure 1~2
Figure 3~6
Figure 7~8
AI summary
Embodiments of the present disclosure relate to a data transmission method and apparatus, a communication device, and a storage medium. The method comprises: receiving measurement information associated with an inter-frequency signal measurement, the measurement information indicating at least one measurement period; receiving first scheduling information associated with a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) resource, the first scheduling information indicating that the first SPS PDSCH resource is configured with a first priority; determining, on the basis of information about the measurement period and the first scheduling information, that the first SPS PDSCH resource overlaps the measurement period in the time domain; and in response to determining that the first SPS PDSCH resource overlaps the measurement period in the time domain, maintaining downlink communication with a serving cell during at least the period of the first SPS PDSCH resource.