Frequency Resource Determination for LTE Data Signals

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Solution Overview

Problem

In existing LTE communications systems, the indication signal cannot effectively avoid frequency selective fading, preventing the attainment of frequency diversity gain due to random frequency resource allocation for data signals.

Innovation Solution

The method involves sending an indication signal that specifies the frequency resource numbers for data signals, allowing user equipment to determine and utilize specific frequency resources using formulas that incorporate pseudo-random sequences and resource adjustment values to optimize resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If random frequency resource allocation is used for data signals, then frequency selective fading cannot be avoided, but implementation is simple

Engineering Contradiction:

Improvefrequency diversity gainVSAvoidfrequency resource allocation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-defining the relationship between indication signal resource numbers and data signal frequency resources through formulas. The frequency resource for data signals is determined in advance based on the indication signal resource number and pseudo-random sequences, allowing the system to achieve frequency diversity gain without complex real-time allocation decisions.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system achieves self-service through autonomous frequency resource determination. User equipment automatically calculates the data signal frequency resource using the indication signal resource number and predefined formulas with pseudo-random sequences, eliminating the need for complex base station coordination and enabling independent frequency diversity optimization at the device level.

Inventive Principle:

Principle #25Self-service

2Reliability

If specific frequency resources are determined using formulas with pseudo-random sequences, then frequency selective fading is avoided, but calculation complexity increases

Engineering Contradiction:

Improvefrequency diversity gainVSAvoidfrequency resource determination difficulty

Core Design Contradiction:

ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies parameter changes by introducing pseudo-random sequences as dynamic parameters in the frequency resource determination formula. The frequency resource varies according to the indication signal resource number and pseudo-random sequence values, transforming a static resource allocation into a dynamic parameter-driven system that achieves frequency diversity while maintaining calculability through standardized mathematical operations.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10136430B2Data transmission using frequency resources determined from frequency resource numbers

Publication Date: 2018.11.20 HUAWEI TECH CO LTD

AI summary

Embodiments of the present invention provide a data transmission method and user equipment, where the method includes: sending, by first user equipment, an indication signal, where the indication signal indicates frequency resource numbers of one or more physical resources (S110); determining, by the first user equipment according to the frequency resource numbers, a frequency resource occupied by a data signal (S120); and sending, by the first user equipment, the data signal by using the frequency resource (S130). According to the embodiments of the present invention, a frequency diversity gain can be obtained.