Beam Management for Overlapping Downlink Reception Switching

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Solution Overview

Problem

Wireless devices face challenges in determining whether to receive and decode overlapping transmissions from base stations, leading to potential drops in communication due to insufficient processing capabilities, and resource switching delays caused by waiting for MAC control elements.

Innovation Solution

Implementing a rule-based system for wireless devices to select resources using CORESET group indexes and TCI states from previously active bandwidth parts to efficiently receive and decode overlapping transmissions and synchronize with base stations during resource switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If a wireless device receives and decodes overlapping transmissions, then the quantity of received transmissions increases, but processing capability becomes insufficient leading to communication drops

Engineering Contradiction:

Improvequantity of overlapping transmissions receivedVSAvoidcommunication reliability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent segments overlapping transmissions into different CORESET groups, allowing the wireless device to process transmissions from different groups simultaneously while maintaining processing capability. Each CORESET group can be handled independently, enabling the device to receive multiple transmissions without overwhelming its processing resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent dynamically adjusts the handling of overlapping transmissions based on CORESET group indices. The wireless device can adaptively select which transmissions to receive and decode by examining the CORESET group index, enabling flexible resource allocation and processing prioritization to maintain reliability under varying transmission loads.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If a wireless device waits for MAC control element during resource switching, then resource switching accuracy improves, but switching delay increases

Engineering Contradiction:

Improveresource switching accuracyVSAvoidresource switching delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the wireless device proactively determine the active TCI state based on the active BWP before resource switching occurs. The device monitors CORESETs in the new active BWP using the determined TCI state from the previously active BWP, eliminating the need to wait for MAC control element confirmation and reducing switching delay while maintaining accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The wireless device performs self-service by autonomously determining which TCI state to use during resource switching based on pre-configured rules and the active BWP state. Instead of relying on external MAC control elements to provide this information, the device independently makes the determination, reducing dependency on additional signaling and minimizing switching delay.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20230164797A1Downlink reception and beam management

Publication Date: 2023.05.25 COMCAST CABLE COMM LLC

AI summary

Wireless communications may comprise communications between a base station and a wireless device. The base station may send and/or schedule one or more transmissions to the wireless device that may overlap in time. The wireless device may receive and/or decode overlapping transmissions that are associated with a different indication and/or the wireless device may not receive at least one of overlapping transmissions that are associated with the same indications.