eMTC PUSCH HARQ Feedback Disablement in Non-Terrestrial Networks

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Solution Overview

Problem

Current wireless communication systems face limitations in flexibility and efficiency, particularly in non-terrestrial networks (NTNs) for enhanced Machine Type Communication (eMTC) services, where existing solutions struggle to effectively manage Hybrid Automatic Repeat Request (HARQ) feedback and timing offsets for improved communication capacity and speed.

Innovation Solution

The implementation of user equipment (UE) and base station (gNB) configurations that include receiving and transmitting circuitry for eMTC physical uplink shared channel (PUSCH) signaling, with the ability to indicate HARQ feedback disablement and timing offsets, and the processor's role in flushing data buffers based on received information, optimizing eMTC PUSCH operations in NTNs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If HARQ feedback is enabled for eMTC PUSCH in NTN, then reliability of data transmission is improved, but communication delay increases due to feedback round-trip time

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidcommunication delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent extracts the HARQ feedback mechanism from the standard uplink transmission process by introducing a disablement indicator that allows HARQ feedback to be selectively removed for eMTC PUSCH transmissions in NTN, thereby eliminating the feedback round-trip time while maintaining transmission reliability through alternative means

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent makes the HARQ feedback mechanism dynamic by allowing the network to configure whether HARQ feedback is enabled or disabled for eMTC PUSCH through signaling, enabling flexible adaptation between reliability and delay requirements based on specific transmission scenarios and channel conditions

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If timing offset adjustments are made for eMTC PUSCH in NTN, then synchronization accuracy is improved, but system complexity increases

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-configuring timing offset parameters and synchronization information through higher-layer signaling before eMTC PUSCH transmission, allowing UEs to proactively adjust their timing without requiring complex real-time synchronization mechanisms during actual data transmission

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20240340112A1User equipments, base stations and signaling for uplink of enhanced machine type communication over non-terrestrial networks

Publication Date: 2024.10.10 SHARP KK

AI summary

A user equipment (UE) is described. The UE includes receiving circuitry configured to receive signaling that includes a configuration for an enhanced Machine Type Communication (eMTC) physical uplink shared channel (PUSCH) in a non-terrestrial network (NTN). The receiving circuitry is also configured to receive signaling that includes first information to indicate whether Hybrid Automatic Repeat Request (HARQ) feedback is disabled for the enhanced Machine Type Communication (eMTC) PUSCH. The receiving circuitry is further configured to receive signaling that comprises second information to indicate a timing offset for the enhanced Machine Type Communication (eMTC) PUSCH. The UE also includes transmitting circuitry configured to transmit the enhanced Machine Type Communication (eMTC) PUSCH based on the configuration and the second information. The UE further includes a processor configured to flush a data buffer of the enhanced Machine Type Communication (eMTC) PUSCH based on the first information.