PBCH Decoding Selection Based on SS/PBCH Time Index

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Solution Overview

Problem

Existing methods for decoding physical broadcast channels in wireless communication networks are inefficient, leading to wastage of processing and energy resources, as they often require attempting multiple decoding methods without adapting to the specific properties of the radio channel.

Innovation Solution

A communication device selects the most appropriate decoding method, such as single-shot or soft-combining, based on whether the time index of the synchronization signal and physical broadcast channel block is known, thereby adapting to the radio channel properties and avoiding unnecessary decoding attempts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple decoding methods are attempted without adaptation, then decoding reliability is improved, but processing time and energy consumption increase

Engineering Contradiction:

Improvedecoding reliabilityVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies dynamics by making the decoding method selection adaptive rather than static. The communication device dynamically chooses between single-shot decoding and soft-combining decoding based on real-time channel conditions and whether the time index is known, optimizing the balance between reliability and processing time for each specific scenario

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of decoding method selection based on channel conditions and time index availability. By adjusting which decoding method is used according to these parameters, the system achieves reliable decoding while minimizing processing time and energy consumption

Inventive Principle:

Principle #35Parameter changes

2Reliability

If multiple decoding methods are attempted without adaptation, then decoding reliability is improved, but energy consumption increases

Engineering Contradiction:

Improvedecoding reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adapts the decoding method based on channel conditions and time index knowledge, avoiding unnecessary energy expenditure on multiple decoding attempts when conditions allow for more efficient single-shot decoding while maintaining reliability when needed

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The decoding approach changes based on parameters such as channel quality and time index availability, optimizing energy usage by selecting the most efficient method for each scenario rather than consistently using energy-intensive multi-method attempts

Inventive Principle:

Principle #35Parameter changes

3Productivity

If adaptive decoding method selection is implemented, then processing efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveprocessing efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the decoding process into distinct methods (single-shot and soft-combining) with clear selection criteria. This segmentation allows the device to efficiently choose the appropriate method without requiring complex integrated processing, maintaining simplicity while improving efficiency

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses parameter-based decision making (whether time index is known, channel conditions) to select decoding methods. This parameter-driven approach simplifies the control logic compared to more complex adaptive systems, improving processing efficiency without significantly increasing device complexity

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11218176B2First communication device, second communication device, and methods performed thereby for handling decoding of a channel

Publication Date: 2022.01.04 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method performed by a first communication device is disclosed herein. The first communication device operates in a communications network. The first communication device selects a first method to decode a physical broadcast channel from a plurality of methods to decode the physical broadcast channel. The plurality of methods to decode the physical broadcast channel comprises: a) single-shot decoding only, b) soft-combining decoding only, and c) both single-shot decoding and soft-combining decoding simultaneously. The selecting is based on whether or not a time index of a synchronization signal and physical broadcast channel block, SS/PBCH block, for transmitting primary and secondary synchronization signals and a physical broadcast channel is known by the first communication device. The first communication device then decodes the received physical broadcast channel based on the selected first method.