Multi-Slot Transport Block Segmentation for High Subcarrier Spacing

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Solution Overview

Problem

The existing NR specifications do not support scheduling a single transport block that spans over multiple slots, particularly for high subcarrier spacings, leading to constraints on hardware implementation and processing delays.

Innovation Solution

A mechanism is provided to determine a transport block size based on the number of resource elements across multiple time slots, segment the block into coded blocks, and apply channel coding to enable transmission and reception across these slots, allowing for flexible segmentation and rate matching of coded blocks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single transport block is scheduled to span over multiple slots, then transmission flexibility and support for high subcarrier spacings are improved, but hardware implementation complexity and processing delay increase

Engineering Contradiction:

Improvetransmission flexibilityVSAvoidhardware implementation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The transport block is divided into multiple code blocks that can be independently processed and transmitted across different slots. Each code block is segmented and assigned to specific resource elements within the multi-slot transmission framework, enabling parallel processing and reducing hardware complexity while maintaining transmission flexibility

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The transmission is extended from a single-slot time dimension to a multi-slot time-frequency grid. By organizing code blocks across multiple slots with different resource element allocations, the system gains additional degrees of freedom for scheduling and resource allocation without proportionally increasing hardware complexity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If a single transport block is scheduled to span over multiple slots, then support for high subcarrier spacings is improved, but processing delay increases

Engineering Contradiction:

Improvesupport for high subcarrier spacingsVSAvoidprocessing delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

Code blocks are prepared and segmented in advance before transmission. The segmentation and initial processing of code blocks occur prior to the actual multi-slot transmission, allowing the system to accommodate high subcarrier spacings without incurring additional processing delays during the transmission phase

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12388587B2Transport block (TB) determination for TB transmission over multiple slots

Publication Date: 2025.08.12 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method, system and apparatus are disclosed for a network node to communicate with a wireless device (WD). The network node and/or WD are configured to determine a transport block, TB, size based at least in part on a number of resource elements in a plurality of time slots; determine a segmentation of a transport block, TB, having the TB size, the segmentation producing a plurality of segmented code blocks, CBs; determine a channel coding for each of the plurality of segmented CBs, the channel coding producing a plurality of coded CBs; and one of transmit and receive the plurality of coded CB s over the plurality of time slots according to the determined segmentation and the determined channel coding.