PUSCH OCC Multiplexing for Reliable NTN Uplink Capacity

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Solution Overview

Problem

Existing PUSCH repetition methods in wireless communication systems, particularly in NTN scenarios, enhance signal reliability but compromise system capacity efficiency due to repeated use of uplink resources, especially in resource-constrained environments.

Innovation Solution

Implementing orthogonal cover code (OCC) multiplexing techniques for PUSCH transmissions, allowing multiple UEs to share the same frequency resource blocks through inter-slot and inter-symbol OCC configurations, enhancing transmission capacity without compromising reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If PUSCH repetition is used to enhance signal reliability, then transmission reliability is improved, but system capacity efficiency deteriorates due to repeated use of uplink resources

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidsystem capacity efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the PUSCH transmission into multiple repetitions that can be multiplexed using different OCC sequences. Each repetition is treated as a separate segment that can be independently coded and combined at the receiver, allowing reliability enhancement without proportionally increasing resource consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces OCC sequence dimension to the PUSCH transmission resource space. By multiplying PUSCH transmissions with different OCC sequences, multiple UEs can share the same time-frequency resources while maintaining distinguishability, effectively adding a code domain dimension to resolve the capacity-reliability tradeoff.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If multiple UEs share the same frequency resource blocks using OCC multiplexing, then system capacity is improved, but signal reliability may deteriorate due to potential interference

Engineering Contradiction:

Improvesystem capacityVSAvoidsignal reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent changes the OCC sequence parameter (e.g., length, pattern) based on the number of multiplexed UEs and channel conditions. By dynamically adjusting OCC parameters, the system optimizes both capacity and reliability - longer OCC sequences provide better separation for more UEs, while shorter sequences reduce overhead when fewer UEs are active.

Inventive Principle:

Principle #35Parameter changes

3Area of stationary object

If PUSCH repetition is implemented in resource-constrained NTN environments, then coverage is improved, but resource consumption increases significantly

Engineering Contradiction:

Improvecoverage areaVSAvoiduplink resource consumption

Core Design Contradiction:

Area of stationary objectVSQuantity of substance

Solution Approach 1:

The patent makes the uplink resources universal by enabling multiple UEs to simultaneously use the same time-frequency resources through OCC multiplexing. The same resource blocks serve multiple purposes - carrying transmissions from multiple UEs with different OCC codes - thereby improving coverage area without proportionally increasing resource consumption.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250267661A1Methods and systems of pusch multiplexing with pusch repetition

Publication Date: 2025.08.21 SAMSUNG ELECTRONICS CO LTD

AI summary

A system and a method of wireless communication are disclosed. The method includes the steps of scheduling a first user equipment (UE) to transmit a first physical uplink shared channel (PUSCH); applying an orthogonal cover code (OCC) multiplexing configuration to the first PUSCH; and transmitting, by the first UE, the first PUSCH to a network device.