Partial Measurement Gaps for Low-Latency XR Wireless Links
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Solution Overview
Problem
The misalignment between measurement gaps and extended reality (XR) data periodicity, as well as multiple subscriber identity module (MSIM) tuning away periods, leads to collisions that negatively impact the latency performance of XR applications in wireless communication systems.
Innovation Solution
Implementing a partial or soft gap for measurement or MSIM tuning away with variable gap starting time and length, allowing a UE to perform measurements with a first portion of receive chains during the gap and communicate with a serving cell using a second portion of receive chains during the same gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a UE performs full measurement gaps for inter-frequency and inter-RAT measurements, then measurement precision is improved, but latency performance of XR applications deteriorates due to complete suspension of communication
Solution Approach 1:
The receive chains are segmented into first portion and second portion, where the first portion performs measurements while the second portion maintains communication with the serving cell. This segmentation allows simultaneous measurement and communication activities, eliminating the need for complete communication suspension during measurement gaps.
Solution Approach 2:
Instead of suspending all receive chains for measurements (excessive action), only the first portion of receive chains is allocated for measurement activities. The second portion continues normal communication operations, providing partial measurement capability while maintaining service continuity and reducing latency.
2Measurement precision
If a UE suspends communication with serving cell during measurement gaps, then measurement precision is improved, but productivity deteriorates due to interruption of data transmission
Solution Approach 1:
The receive chains are divided into functional segments: first portion dedicated to measurement tasks and second portion dedicated to communication tasks. This segmentation enables parallel operation of measurement and communication functions, maintaining productivity during measurement activities.
Solution Approach 2:
The second portion of receive chains ensures continuous communication with the serving cell during measurement gaps. This continuity of useful action maintains data transmission productivity while the first portion performs measurements, eliminating interruptions to service.
3Adaptability or versatility
If a UE performs MSIM tuning away for multiple SIM operations, then adaptability is improved, but loss of time increases due to tuning away periods
Solution Approach 1:
The receive chains are segmented to allow simultaneous MSIM tuning away operations and serving cell communication. The first portion handles tuning away for multiple SIM operations while the second portion maintains active communication, enabling multi-SIM functionality without complete communication interruption.
4Measurement precision
If a UE uses all receive chains for measurements during gap periods, then measurement precision is improved, but ease of operation deteriorates due to complete communication interruption
Solution Approach 1:
The receive chains are segmented into measurement-dedicated and communication-dedicated portions. This segmentation maintains ease of operation by keeping communication active through the second portion while the first portion performs measurements, avoiding complete communication interruption and maintaining user experience.
Data Source
AI summary
A method for wireless communication at a user equipment (UE) and related apparatus are provided. In the method, the UE transmits an indication of support for a partial gap or a soft gap for measurement or multiple subscriber identity module (SIM) device (MSIM) tuning away; and receives, after the indication of the support, a configuration for the partial gap or the soft gap for the measurement or the MSIM tuning away. The UE further performs at least one measurement or the MSIM tuning away with a first portion of receive chains during the partial gap or the soft gap; and communicates with a serving cell or a first SIM using a second portion of the receive chains during the partial gap or the soft gap.