GCL Sequence Symmetry for Wireless Sync

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Solution Overview

Problem

The detection probability of unique cell information in wireless communication systems using GCL sequences is degraded due to noise and interference, requiring mobile stations to suspend communication and change reception frequency settings to receive signals over the entire band for synchronization.

Innovation Solution

A wireless communication method that allocates sequence elements indicative of communication parameters to synchronization channel symbols, maintaining symmetry to correct and interpolate signals, allowing mobile stations to restore synchronization and extract communication parameters from a half frequency band.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If mobile station receives signals over the entire band to improve detection probability of communication parameters, then detection accuracy improves, but communication must be suspended and reception frequency settings changed

Engineering Contradiction:

Improvedetection probability of communication parametersVSAvoidcommunication continuity

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent applies partial action by receiving and processing only a half frequency band of the synchronization channel instead of the entire band. The symmetric property of the GCL sequence allows the mobile station to extract communication parameters from just one half of the frequency band, avoiding the need to suspend communication for full-band reception while maintaining sufficient detection accuracy

Inventive Principle:

Principle #16Partial or excessive action

2Measurement precision

If mobile station receives signals over the entire band to extract communication parameters, then parameter extraction accuracy improves, but noise and interference impact increases

Engineering Contradiction:

Improveparameter extraction accuracyVSAvoidnoise and interference impact

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent extracts only the necessary information from a half frequency band rather than processing the entire band. By utilizing the symmetric property of the GCL sequence, the mobile station can extract communication parameters from one half of the frequency band, thereby reducing exposure to noise and interference while maintaining extraction accuracy

Inventive Principle:

Principle #2Taking out (Extraction)

3Loss of information

If synchronization channel is transmitted over full frequency band, then complete information is available, but reception time and complexity increase

Engineering Contradiction:

Improveinformation completenessVSAvoidreception time

Core Design Contradiction:

Loss of informationVSLoss of time

Solution Approach 1:

The patent processes only a half frequency band of the synchronization channel by exploiting the symmetric property of the GCL sequence. This partial processing approach reduces reception time and computational complexity while the symmetry-based reconstruction ensures that no critical information is lost, as the missing half can be inferred from the received half

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS8045538B2Wireless communication method, receiving method, and wireless communication device

Publication Date: 2011.10.25 SNAPTRACK INC

AI summary

In a wireless communication method, a base station device allocates elements of a sequence having an index indicative of a communication parameter to synchronization channel symbols generates a synchronization channel while maintaining symmetry of the sequence, and transmits signals including the synchronization channel. A mobile station device restores synchronization of the signals which are faded corrects the signals based on the symmetry of the sequence, and extracts the communication parameter.