Dynamic Pre-Equalization Switching for Low-Power XR Downlink
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Solution Overview
Problem
Wireless devices with limited processing capabilities, such as extended reality (XR) devices, experience increased power consumption due to high processing demands, particularly in applications like physical layer signaling and modem operations.
Innovation Solution
Implementing dynamic pre-equalization switching by a more capable user equipment (UE) to pre-equalize downlink messages based on channel measurements, reducing the need for receiver-side equalization in the XR device and optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the XR device performs receiver-side equalization processing, then the processing capability is utilized, but the power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the transmitting device perform pre-equalization processing on the signal before transmission. This advance processing reduces or eliminates the need for complex receiver-side equalization at the XR device, thereby reducing its processing power requirements and power consumption while maintaining communication quality.
2Reliability
If the XR device performs physical layer signaling and modem operations, then the communication function is maintained, but the processing demand increases
Solution Approach 1:
The patent extracts the complex equalization processing function from the XR device and relocates it to the transmitting device. This extraction reduces the processing demand and complexity at the XR device while maintaining the communication function, as the pre-equalized signal requires minimal processing at the receiver side.
3Productivity
If the transmitting device performs pre-equalization processing, then the receiver processing is reduced, but the transmission scheme complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically selecting from multiple pre-equalization transmission schemes based on channel conditions. The transmitting device can adjust parameters such as equalization coefficients and transmission configurations to optimize performance while managing complexity, allowing the receiver to benefit from reduced processing without being locked into a single complex scheme.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some examples, the first wireless device may transmit, to a second wireless device, a control message indicating a set of pre-equalization transmission schemes supported by the first wireless device for receipt of messaging pre-equalized by the second wireless device. The first wireless device may transmit a measurement report that indicates a measurement of a wireless channel between the first wireless device and the second wireless device, where the measurement may be a signal-to-interference and noise (SINR) measurement. The first wireless device may receive a control signal indicative of a first pre-equalization transmission scheme to be used by the second wireless device for pre-equalization based at least in part on the set of pre-equalization transmission schemes and the measurement. The first wireless device may receive, via the wireless channel, a downlink message pre-equalized in accordance with the first pre-equalization transmission scheme.