Uplink Signal Mobility Management in 5G Terminals

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Solution Overview

Problem

In ultra-dense 5G networks, conventional terminal mobility management based on downlink pilot signal/downlink reference signal measurements leads to high overhead and power consumption for terminals, requiring frequent base station reselection and handover, which complicates user-centered service provisioning.

Innovation Solution

The method involves sending uplink signal configuration information from a network device to a terminal, allowing base stations to measure and report uplink signal information, which is then used by the network device to configure the terminal's serving base station, eliminating the need for terminal-side downlink signal measurement and reselection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If terminal performs downlink pilot signal/downlink reference signal measurements and base station reselection, then mobility management is achieved, but terminal power consumption and complexity increase

Engineering Contradiction:

Improvemobility managementVSAvoidterminal power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent inverts the conventional mobility management approach by switching from downlink signal measurement (terminal receives and measures) to uplink signal measurement (base station receives and measures). The terminal sends uplink pilot signals or sounding reference signals, and base stations measure these signals to determine terminal location and serving base station selection, thereby reducing terminal power consumption while maintaining mobility management functionality

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces uplink pilot signals and sounding reference signals as intermediary elements. Instead of the terminal directly measuring downlink signals to make mobility decisions, the terminal transmits these intermediary uplink signals that enable base stations to perform measurements and make mobility management decisions on behalf of the terminal

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If terminal performs frequent base station reselection and handover, then optimal connection is maintained, but system complexity increases

Engineering Contradiction:

Improveconnection optimalityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces uplink signal measurements as an intermediary mechanism that enables base stations to autonomously perform mobility management. Base stations measure uplink pilot signals and sounding reference signals to determine terminal location and make handover decisions, reducing the complexity of terminal-side operations while maintaining optimal connection through network-controlled mobility management

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent enables base stations to perform self-service mobility management by autonomously measuring uplink signals from terminals and making serving base station selection decisions. This transfers the mobility management burden from the terminal to the network, reducing terminal complexity while maintaining connection optimality through distributed base station intelligence

Inventive Principle:

Principle #25Self-service

3Measurement precision

If terminal measures downlink reference signals for mobility management, then serving base station selection is achieved, but terminal operational complexity increases

Engineering Contradiction:

Improvebase station selection accuracyVSAvoidterminal operational complexity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent inverts the measurement direction from downlink (terminal measures base station) to uplink (base station measures terminal). The terminal sends uplink pilot signals or sounding reference signals, and base stations measure these signals to determine terminal location and serving base station selection, thereby reducing terminal operational complexity while maintaining measurement precision for accurate base station selection

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent uses uplink pilot signals and sounding reference signals as intermediary carriers that enable precise measurement. These intermediary signals allow base stations to accurately measure terminal location and make informed base station selection decisions without requiring the terminal to perform complex downlink signal analysis

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10623940B2Terminal mobility management method and network device

Publication Date: 2020.04.14 CHONGQING XINGJIE SHUXING TECHNOLOGY PARTNERSHIP ENTERPRISE (LLP)

AI summary

A terminal mobility management method includes: sending, by a first network device, uplink signal configuration information for an idle terminal to a terminal; receiving, by the first network device, uplink signal measurement information sent by a first base station, wherein the uplink signal measurement information is obtained by measurement by the first base station upon receiving an uplink signal carrying a terminal identifier sent by the terminal based on the uplink signal configuration information; and configuring, by the first network device, mobility for the terminal based on the uplink signal measurement information, wherein the configuring mobility is configuring a serving base station for the terminal when a downlink service from the terminal arrives at a network side, such that the terminal receives paging information from the serving base station.