Downlink Channel Estimation Offloading for Cooler XR Devices
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Solution Overview
Problem
XR devices face challenges with high-complexity processing and large power consumption, leading to discomfort and heat issues due to limited heat dissipation, which can be mitigated by shifting channel estimation and equalization operations to a companion UE.
Innovation Solution
Performing channel estimation and equalization at the UE based on unprocessed samples of downlink transmissions, allowing the XR device to avoid these intensive operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel estimation and equalization operations are performed at the XR device, then channel estimation accuracy is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the complex channel estimation and equalization operations from the XR device and relocates them to a companion UE (User Equipment). The XR device only performs lightweight sampling of downlink transmissions and transmits these samples to the companion UE, which then performs the intensive processing. This extraction resolves the contradiction by maintaining estimation accuracy while reducing device complexity at the XR device.
Solution Approach 2:
The patent introduces a companion UE as an intermediary between the XR device and the network. The companion UE receives downlink transmissions, processes the channel estimation and equalization, and provides assistance to the XR device. This intermediary handles the complex computations, allowing the XR device to achieve accurate channel estimation without bearing the processing burden.
2Reliability
If channel estimation and equalization operations are performed at the XR device, then communication quality is improved, but power consumption increases
Solution Approach 1:
The patent extracts the power-intensive channel estimation and equalization operations from the XR device and performs them at the companion UE. The XR device only executes low-power sampling and transmission of samples. This extraction maintains communication quality while dramatically reducing power consumption at the XR device.
Solution Approach 2:
The companion UE acts as a power-saving intermediary that handles the energy-intensive processing tasks. The XR device leverages the companion UE's processing capabilities, avoiding the need to perform complex computations locally and thereby conserving battery power while maintaining communication reliability.
3Temperature
If processing operations are reduced at the XR device, then heat generation is reduced, but processing capability decreases
Solution Approach 1:
The patent extracts the heat-generating processing operations from the XR device and relocates them to the companion UE. The XR device performs only minimal sampling and transmission operations, which generate negligible heat. The processing capability is preserved through the companion UE's computational resources.
Solution Approach 2:
The companion UE serves as a computational intermediary that handles the heavy processing load. The XR device offloads its processing requirements to the companion UE, maintaining full processing capability through the partnership while keeping its own thermal output minimal.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a first downlink transmission. The UE may receive an uplink transmission that includes channel state information including an indication of one or more samples of the first downlink transmission, wherein the one or more samples, before reception of the uplink transmission, are unprocessed for a channel estimation. The UE may transmit a second downlink transmission in accordance with the channel estimation that is based at least in part on the one or more samples. Numerous other aspects are described.