Relay UE Paging via MME Identity Forwarding

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Solution Overview

Problem

The increasing number of user equipment (UEs) and data transmission requirements in wireless communication systems pose challenges in efficiently managing limited radio resources, particularly in reducing latency and efficiently transmitting small amounts of data using new radio access technology, while also minimizing power consumption for remote UEs connected through relay UEs.

Innovation Solution

A method involving a base station (BS) that transmits an identity of a relay UE's mobility management entity (MME) to a remote UE's MME, receives a paging message, and forwards it to the relay UE, allowing for efficient paging and data transmission, even when the relay UE is in idle mode, thereby reducing latency and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a remote UE is connected through a relay UE, then power consumption of the remote UE is reduced, but the complexity of paging delivery increases

Engineering Contradiction:

Improvepower consumption of remote UEVSAvoidpaging delivery complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The relay UE acts as an intermediary to receive and forward paging messages to the remote UE. The base station sends paging messages to the relay UE, which then relays them to the remote UE, enabling power-saving connectivity while managing the complexity through structured message forwarding with relay UE identification inclusion

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If the relay UE is in idle mode, then power consumption is reduced, but the speed of paging delivery increases

Engineering Contradiction:

Improvepaging delivery speedVSAvoidpower consumption of relay UE

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The relay UE dynamically transitions between idle and connected modes based on paging requirements. When paging is needed, the relay UE activates to receive and forward messages; when not needed, it remains in idle mode to conserve power, creating a dynamic power-state management system

Inventive Principle:

Principle #15Dynamics

3Quantity of substance

If the number of UEs increases, then network coverage is improved, but the efficiency of resource management deteriorates

Engineering Contradiction:

Improvenumber of UEsVSAvoidresource management efficiency

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The network segments paging delivery into two stages: base station to relay UE, then relay UE to remote UE. This segmentation allows efficient resource utilization by enabling the base station to page multiple relay UEs simultaneously, each of which then pages its associated remote UEs, scaling the system to support increased UE density

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11259269B2Method and base station for performing paging, and method and network entity for supporting paging

Publication Date: 2022.02.22 LG ELECTRONICS INC

AI summary

In a wireless communication system, when a remote user equipment (UE) accesses a network via a relay UE, a base station provides an identifier of a mobility management entity (MME; relay UE MME) of the relay UE to an MME (remote UE MME) of the remote UE. When paging for the remote UE is required while the remote UE is connected to a network via the relay UE, the remote UE MME transmits a request for paging for the remote UE to the relay UE MME, and the relay UE MME transmits a paging notification to the relay UE or starts a paging process for the relay UE through the base station.