UE-Assisted Tethering Report for XR Latency Measurement
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Solution Overview
Problem
Extended reality (XR) technologies face challenges in meeting strict packet delay budgets due to unknown tethering path latency, leading to decreased user experience in XR services, especially when low-end devices rely on smartphone tethering for network connectivity.
Innovation Solution
The implementation of UE-assisted tethering reports, which include latency and jitter measurements, are transmitted from user equipment (UE) to the gNB, using configured measurement timestamps and reporting formats, enabling accurate latency and jitter reporting for both tethering and XR traffic, thereby improving network awareness and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tethering mode is used to connect wearable devices to network, then network accessibility is shared from smartphone to low-end devices, but network has little cognition on tethering path's serving quality and latency
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures latency and jitter parameters on the tethering path and reports them back to the network. This feedback loop enables the network to obtain real-time information about tethering path quality, resolving the information loss problem while maintaining the versatility of network accessibility sharing.
Solution Approach 2:
The UE acts as an intermediary between the network and the tethered device. By measuring latency and jitter locally and reporting to the network, the UE mediates the information flow, enabling the network to understand tethering path conditions without directly monitoring the path itself.
2Adaptability or versatility
If XR traffic is transmitted through tethering path, then low-end devices can access network, but packet latency increases beyond delay budget
Solution Approach 1:
The patent uses feedback by having the UE measure and report latency information to the network. This enables the network to adjust scheduling decisions based on actual tethering path conditions, potentially reducing packet latency for XR traffic while maintaining device connectivity.
Solution Approach 2:
The network can use the reported latency information to perform preliminary scheduling adjustments and resource allocation decisions, optimizing packet transmission timing before latency issues occur, thereby meeting XR delay budgets.
3Reliability
If latency measurement and reporting is implemented, then network scheduling and link adaptation improve, but measurement and reporting overhead increases
Solution Approach 1:
The patent measures and reports only the most critical latency parameters (latency and jitter) rather than all possible network conditions. This partial measurement approach provides sufficient information for network scheduling and link adaptation while minimizing measurement and reporting overhead.
Data Source
AI summary
Apparatus and methods are provided for UE-assisted tethering report. In one novel aspect, UE-assisted tethering report is generated with UE-assisted procedure based on latency measurement configuration. In one embodiment, the UE-assisted tethering report includes one or more elements comprising one bit to inform the activation of tethering mode, latency of packet transmission, and other side-information related to tethering path. In one embodiment, the UE-assisted procedure is inserting a measurement timestamp or recording timing of a predefined transport block (TB) of the packet. In another novel aspect, the UE performs a jitter measurement for an extended reality (XR) traffic, sends a UE-assisted information report for an end-to-end path of the XR traffic based on the jitter measurements, wherein the UE-assisted information includes one or more elements comprising jitter information and burst arrival time.