Layer 3 Multipath Relay for Split XR Rendering Offload
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Solution Overview
Problem
XR-enabled devices with small form factors face challenges in performing computationally intensive processing tasks due to limited processing power, which affects their ability to deliver immersive experiences.
Innovation Solution
Implementing a Layer 3 multipath relay system that segments rendering tasks between an anchor UE and companion UEs, allowing the companion UE to perform computationally intensive processing on behalf of the anchor UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If XR processing is performed locally on small form factor devices, then device autonomy and responsiveness are improved, but device complexity and power consumption increase significantly
Solution Approach 1:
The system segments the XR processing workload between the anchor UE (which performs lighter processing) and companion UEs (which perform computationally intensive rendering tasks). This segmentation allows the anchor device to maintain autonomy while offloading heavy processing to reduce its power consumption and thermal load.
Solution Approach 2:
Companion UEs act as intermediaries that perform computationally intensive rendering tasks on behalf of the anchor UE. The anchor UE communicates with companion UEs through sidelink interfaces, allowing the intermediary devices to handle heavy processing while the anchor device maintains control and autonomy.
2Use of energy by moving object
If rendering tasks are offloaded to companion UEs, then energy consumption at anchor UE is reduced, but system complexity increases
Solution Approach 1:
The system divides rendering tasks into segments that can be performed by different UEs. The anchor UE handles control functions and lighter processing, while companion UEs handle intensive rendering tasks, creating a segmented but manageable system architecture.
Solution Approach 2:
Companion UEs are designed to be multi-functional, serving both as regular communication devices and as rendering assistants. This universality reduces overall system complexity by using existing devices for multiple purposes rather than requiring specialized dedicated rendering hardware.
3Power
If multiple UEs are coordinated in multipath relay, then processing capability is improved, but communication protocol complexity increases
Solution Approach 1:
The anchor UE serves as an intermediary that coordinates communication between the network and companion UEs. It manages the multipath relay protocol by receiving data from the network and distributing it to appropriate companion UEs, simplifying the overall communication protocol complexity.
Solution Approach 2:
The system dynamically selects and configures companion UEs based on current network conditions and processing requirements. This dynamic adaptation allows the system to optimize processing capability while managing protocol complexity by only activating necessary communication paths when needed.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an anchor user equipment (UE) may receive an indication or configuration for identifying a rendering source in a Layer 3 multipath relay, wherein the Layer 3 multipath relay includes: a first Uu interface for communication with a network node, a sidelink interface for communication with a companion UE, and a second Uu interface for communication between the network node and the companion UE. The UE may communicate with one or more of the network node or the companion UE via the Layer 3 multipath relay and in accordance with the indication or configuration. Numerous other aspects are described.