Parallel Uplink Frequency-Domain Multiplexing for Multi-TRP Interference

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Solution Overview

Problem

Current communication networks, particularly in multi-Transmission Reception Point (TRP) scenarios, face challenges in achieving flexible multiplexing schemes and effectively managing interference between uplink transmissions, which limits the multiplexing capacity and reliability of channels like PUCCH and PUSCH.

Innovation Solution

The implementation of a dynamic frequency-domain multiplexing approach that allows for flexible frequency-domain allocation and switching between different multiplexing schemes (FDM and SDM) by using frequency gaps or offsets between resource allocations for parallel uplink transmissions, enabling improved interference management and increased multiplexing capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If frequency-domain multiplexing is used for parallel uplink transmissions in multi-TRP scenarios, then multiplexing capacity and flexibility are improved, but interference management between transmissions becomes more challenging

Engineering Contradiction:

Improvemultiplexing capacityVSAvoidinterference between transmissions

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the frequency domain resources by introducing frequency gaps between parallel uplink transmissions to different TRPs. This segmentation separates the transmissions in the frequency domain, reducing mutual interference while maintaining multiplexing capacity. The frequency gap acts as a protective barrier between transmissions on different TRPs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by configuring different frequency domain resource allocations for different TRPs. Each TRP receives transmissions with specific frequency characteristics (frequency gaps, offsets) tailored to its local interference conditions and channel properties, optimizing performance for each TRP individually.

Inventive Principle:

Principle #3Local quality

2Productivity

If dynamic frequency-domain allocation is implemented to increase multiplexing capacity, then resource utilization efficiency is improved, but system complexity increases

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic frequency-domain allocation where frequency gaps and offsets are configured adaptively based on channel conditions, TRP locations, and traffic requirements. This dynamic configuration allows the system to optimize resource utilization in real-time while the underlying framework maintains manageable complexity through standardized procedures.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key frequency domain parameters (frequency gaps, offsets, resource block allocations) to achieve optimal multiplexing performance. By adjusting these parameters dynamically, the system improves resource utilization efficiency while maintaining controlled complexity through parameter-based management rather than structural complexity.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If frequency gaps are introduced between resource allocations for parallel transmissions, then interference management is improved, but frequency resource utilization decreases

Engineering Contradiction:

Improveinterference managementVSAvoidfrequency resource utilization

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The frequency gap acts as an intermediary element between parallel uplink transmissions to different TRPs. It provides interference protection while minimizing resource waste by being strategically placed only where needed for isolation, rather than uniformly across all frequency resources. This intermediary approach balances reliability and resource utilization.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies partial action by introducing frequency gaps selectively rather than uniformly. Frequency gaps are configured based on specific interference conditions and TRP pairs, applying the isolation measure only where necessary. This partial application maintains interference management effectiveness while minimizing the overall impact on frequency resource utilization.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250016752A1Parallel uplink transmission based on frequency-domain multiplexing information

Publication Date: 2025.01.09 NOKIA TECHNOLOGIES OY

AI summary

There is inter alia disclosed a user equipment. UE, for transmitting at least two parallel uplink transmissions associated with a common uplink information payload and including a first uplink transmission and a second uplink transmission, comprising means for:—receiving information indicative of a common frequency-domain resource allocation for the at least two parallel uplink transmissions:—determining, a first frequency-domain resource allocation for the first uplink transmission and a second frequency-domain resource allocation for the second uplink transmission at least based on the common frequency-domain resource allocation and on frequency-domain multiplexing information indicative of a frequency gap or a frequency offset between the first frequency-domain resource allocation and the second frequency-domain resource allocation; and—transmitting the first uplink transmission using the first frequency-domain resource allocation and transmitting the second uplink transmission using the second frequency-domain resource allocation.