PUSCH Parallel Encoding Architecture for Lower LTE Uplink Latency

Solution Overview

Problem

Current 3GPP LTE PUSCH encoding methods experience latency due to sequential processing of channel quality information (CQI), uplink shared channel (UL-SCH), rank indication (RI), and acknowledgement (ACK) data, which hinders efficient data transmission in wireless communication systems.

Innovation Solution

A parallel encoding approach for PUSCH data using dedicated encoding units for CQI, UL-SCH, RI, and ACK data, combined with a channel interleaving unit that employs dual-port RAMs and a handshake protocol to interleave and store data in specific buffer areas, optimizing data processing and reducing latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If sequential encoding processing is used for CQI, UL-SCH, RI, and ACK data, then device complexity is reduced, but latency increases and productivity decreases

Engineering Contradiction:

Improveencoding latencyVSAvoidencoder structure complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The encoder is divided into four independent encoding units (CQI encoding unit, UL-SCH encoding unit, RI encoding unit, ACK encoding unit), each capable of processing different data types in parallel. This segmentation allows simultaneous encoding operations without increasing overall system complexity, as each unit operates independently with dedicated resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The channel interleaving unit serves as a universal component that receives and interleaves output from all four encoding units. This multi-functional unit consolidates the complexity of managing multiple encoding streams, providing a single point of integration that handles diverse data types (CQI, UL-SCH, RI, ACK) through a unified interleaving process.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If sequential encoding processing is used for CQI, UL-SCH, RI, and ACK data, then device complexity is reduced, but productivity decreases

Engineering Contradiction:

Improvedata processing throughputVSAvoidencoder structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The encoder is divided into four independent encoding units (CQI encoding unit, UL-SCH encoding unit, RI encoding unit, ACK encoding unit), each capable of processing different data types in parallel. This segmentation allows simultaneous encoding operations without increasing overall system complexity, as each unit operates independently with dedicated resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

All four encoding units operate continuously and simultaneously, ensuring that no processing stage waits for another to complete. The parallel architecture maintains continuous useful action across all data types (CQI, UL-SCH, RI, ACK), maximizing throughput without requiring complex coordination mechanisms.

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If parallel encoding operations are implemented, then latency is reduced and productivity is enhanced, but device complexity increases

Engineering Contradiction:

Improveprocessing speedVSAvoidencoding system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The encoder is divided into four independent encoding units (CQI encoding unit, UL-SCH encoding unit, RI encoding unit, ACK encoding unit), each capable of processing different data types in parallel. This segmentation allows simultaneous encoding operations without increasing overall system complexity, as each unit operates independently with dedicated resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The channel interleaving unit acts as an intermediary that receives encoded output from all four parallel encoding units and performs interleaving to combine them. This mediator component simplifies the integration of parallel operations by providing a single consolidation point, managing the complexity of coordinating multiple parallel streams through a unified interleaving process.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8726116B2Physical uplink shared channel encoder for user equipment modem and encoding method of the same

Publication Date: 2014.05.13 ELECTRONICS & TELECOMM RES INST

AI summary

Provided are a Physical Uplink Shared CHannel (PUSCH) encoder and an encoding method of the same. The PUSCH encoder includes a plurality of encoding units and a channel interleaving unit interleaving the data transferred from the plurality of encoding units. Herein, the respective encoding units perform encoding operations on different data. The PUSCH encoder is configured to perform the respective encoding operations in parallel. In accordance with the PUSCH encoder and the encoding method thereof, the encoding operations are performed on different data in parallel to reduce latency, leading to an increase in processing speed of a codec system. Furthermore, the increase in processing speed of the codec system results in the improvement of performance and throughput per unit hour in a data communication system.