Inter-Frequency Measurement Gap Scheduling for URLLC Downlink Reception
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Solution Overview
Problem
In 5G NR systems, User Equipment (UE) experiences downlink data reception interruptions during inter-frequency measurement gaps, leading to increased latency for low-latency services like URLLC, as the UE cannot receive downlink information from the serving cell during these gaps.
Innovation Solution
Determine one or more downlink time periods within the inter-frequency measurement gap and utilize the uplink frequency band to receive downlink information from the serving cell during these periods, allowing partial reception during gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE performs inter-frequency measurement during measurement gap, then mobility measurement capability is improved, but downlink data reception for URLLC services is disrupted causing increased latency
Solution Approach 1:
The measurement gap is segmented into multiple parts: a first part for inter-frequency measurement and a second part for downlink data reception. This segmentation allows the UE to perform mobility measurement while simultaneously receiving URLLC data, resolving the contradiction by dividing the time resource into functional segments that serve different purposes without mutual interference
Solution Approach 2:
The patent introduces a new dimension by allowing downlink data reception during the measurement gap period through frequency switching. Instead of treating the measurement gap as a complete blockout period, the system adds the capability to switch frequencies and receive data in the same time window, effectively utilizing another dimension (frequency switching capability) to resolve the time resource conflict
2Adaptability or versatility
If the UE receiver bandwidth is insufficient to cover both service frequencies and measurement frequencies, then measurement capability is maintained, but normal downlink service data reception is interrupted during measurement gap
Solution Approach 1:
The patent applies dynamic frequency switching during the measurement gap. The UE dynamically switches its receiver frequency from the measurement frequency back to the serving cell frequency during the second part of the measurement gap, enabling adaptive reception of downlink data. This dynamic adjustment resolves the contradiction by making the receiver frequency flexible rather than fixed during the gap period
Solution Approach 2:
The measurement gap is structured with periodic alternating actions: first performing inter-frequency measurement, then switching to receive downlink data from the serving cell. This periodic alternation between measurement and data reception modes allows both functions to be fulfilled systematically without continuous interruption, maintaining productivity while preserving measurement capability
Data Source
AI summary
The present disclosure relates to the technical field of communication, and relates to communication methods and devices, and storage media. The method includes: determining, by a terminal, one or more downlink time periods within an inter-frequency measurement gap; and receiving, by the terminal from a serving cell within the downlink time periods, downlink information on an uplink frequency band.