Terminal Reference Signal Cyclic Shift Randomization

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Solution Overview

Problem

Current wireless communication technologies, such as LTE and NR, face interference issues between reference signals sent by terminal devices using different base sequences, which cannot be randomized by existing cyclic shift hopping methods, leading to deteriorated channel time domain filtering performance.

Innovation Solution

A method that determines an initial seed parameter for a pseudo-random sequence based on terminal device attributes, generating unique cyclic shift values for each device, thereby randomizing interference between reference signals and improving channel time domain filtering performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If cyclic shift hopping technology is used with the same uplink cyclic shift hopping pattern for all terminal devices, then the implementation is simple, but interference between reference signals cannot be randomized and channel time domain filtering performance deteriorates

Engineering Contradiction:

Improveimplementation simplicityVSAvoidchannel time domain filtering performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies local quality by making each terminal device use a different cyclic shift hopping pattern tailored to its specific characteristics (such as cell ID, terminal ID, or uplink carrier frequency). This ensures that each device experiences randomized interference independently, improving channel time domain filtering performance without requiring complex network coordination

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent introduces dynamics by making the cyclic shift hopping pattern variable and adaptive rather than static and uniform. The pattern changes based on terminal device attributes and can be dynamically adjusted, allowing the system to optimize interference randomization for each device while maintaining implementation feasibility

Inventive Principle:

Principle #15Dynamics

2Ease of manufacture

If different terminal devices use the same cyclic shift value for reference signals, then the configuration is simple, but interference between reference signals from different base sequences is not reduced

Engineering Contradiction:

Improveconfiguration simplicityVSAvoidinterference between reference signals

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent changes the cyclic shift value parameter dynamically for each terminal device based on its attributes (cell ID, terminal ID, uplink carrier frequency). By modifying this key parameter, the patent effectively randomizes interference between reference signals from different base sequences while maintaining configuration simplicity through automated determination

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11882071B2Reference signal sending method, signal detection method, and apparatus

Publication Date: 2024.01.23 HUAWEI TECH CO LTD

AI summary

The present disclosure relates to reference signal sending methods, signal detection methods, and apparatus. One example method includes determining an initial seed parameter of a pseudo-random sequence, and generating the pseudo-random sequence based on the initial seed parameter, where the initial seed parameter is determined based on attribute information of a terminal device, determining a cyclic shift value based on the pseudo-random sequence, and determining a reference signal based on the cyclic shift value, and sending the reference signal to a network device.