Multicast Time Resource Allocation for Interference Mitigation

Solution Overview

Problem

Wireless communication systems face challenges in managing cross-link interference and self-interference during multicast transmissions in full-duplex environments, where half-duplex and full-duplex UEs share time resources, making it difficult for network entities to determine appropriate communication parameters.

Innovation Solution

The system transmits an indication of common time resources available for multicast transmissions to both half-duplex and full-duplex UEs, allowing the network entity to use scheduling information to determine a subset of time resources for multicast transmissions, aligning with parameters used in half-duplex configurations to mitigate interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multicast transmissions are performed in full-duplex time resources, then system productivity is improved, but cross-link interference and self-interference increase

Engineering Contradiction:

Improvemulticast transmission efficiencyVSAvoidcross-link interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments time resources into distinct types (full-duplex time resources and half-duplex time resources) and assigns different multicast transmission strategies to each segment. By dividing the time domain into these segments, the system can exploit full-duplex resources for high-efficiency multicast while avoiding interference issues in half-duplex resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different communication parameters and transmission modes to different time resource locations. Specifically, full-duplex time resources use parameters optimized for simultaneous transmit and receive operations, while half-duplex time resources use parameters appropriate for sequential operations. This local adaptation of quality parameters resolves the contradiction by matching transmission characteristics to the operational mode of each time segment.

Inventive Principle:

Principle #3Local quality

2Productivity

If multicast transmissions are performed in full-duplex time resources, then system productivity is improved, but self-interference increases

Engineering Contradiction:

Improvemulticast transmission efficiencyVSAvoidself-interference

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent segments time resources into distinct types (full-duplex time resources and half-duplex time resources) and assigns different multicast transmission strategies to each segment. By dividing the time domain into these segments, the system can exploit full-duplex resources for high-efficiency multicast while avoiding interference issues in half-duplex resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes communication parameters based on the time resource type. For full-duplex time resources, parameters are configured to account for and mitigate self-interference effects, while half-duplex time resources use different parameters. This dynamic parameter adjustment allows the system to maintain high productivity in full-duplex modes while managing self-interference through appropriate parameter selection.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If common time resources are indicated to both half-duplex and full-duplex UEs, then adaptability is improved, but determining appropriate communication parameters becomes more difficult

Engineering Contradiction:

Improvecompatibility across UE typesVSAvoidparameter determination complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The network entity segments time resources into full-duplex and half-duplex categories and maintains separate parameter sets for each segment type. When indicating common time resources to UEs of different types, the system provides segment-specific parameter information, allowing each UE to select appropriate parameters based on its operational mode without requiring complex cross-mode parameter determination.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different communication parameters and transmission modes to different time resource locations. Specifically, full-duplex time resources use parameters optimized for simultaneous transmit and receive operations, while half-duplex time resources use parameters appropriate for sequential operations. This local adaptation of quality parameters resolves the contradiction by matching transmission characteristics to the operational mode of each time segment.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20240098759A1Common time resources for multicasting

Publication Date: 2024.03.21 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. For instance, a user equipment (UE) may receive, from a network entity, an indication of a set of time resource common to a set of UEs and available for communication of a multicast transmission from the network entity to two or more of the set of UEs, where the two or more of the set of UEs includes the UE, and where the set of time resources are a subset of a plurality of time resources of a carrier configured for the UE. The UE may receive, from the network entity, a grant for the multicast transmission and the multicast transmission over a subset of the set of resources, where the subset of the set of time resources is determined based on scheduling information associated with the grant and the indication of the set of time resources.