Relay UE Resource Allocation for Out-of-Coverage Data Relay

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently allocating communication resources for data relay between in-coverage and out-of-coverage user equipment devices, particularly in scenarios where direct device-to-device communication is necessary to bypass the base station.

Innovation Solution

An in-coverage relay user equipment device selects or is allocated communication resources from a pool to facilitate data relay between an eNB and out-of-coverage UE devices, using standardized LTE D2D communication procedures to establish and manage device-to-device links, thereby enabling efficient data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If direct device-to-device communication is used for out-of-coverage UE devices, then communication coverage is extended, but resource allocation complexity increases

Engineering Contradiction:

Improvecoverage areaVSAvoidresource allocation complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The patent introduces an in-coverage relay UE device as an intermediary between the network and out-of-coverage UE devices. The relay UE device receives resource allocations from the network and forwards them to out-of-coverage devices, thereby extending coverage while managing resource allocation complexity through the intermediary's coordination role.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If relay UE devices are introduced for out-of-coverage communication, then communication reliability is improved, but signaling overhead increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent merges the relay UE device's operations into existing D2D communication frameworks and resource allocation procedures. By integrating relay functionality with standard D2D mechanisms, the system achieves improved reliability through relay assistance while minimizing additional signaling overhead by reusing existing protocol structures.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If standardized LTE D2D procedures are used for relay communication, then system compatibility is maintained, but flexibility in resource allocation is reduced

Engineering Contradiction:

Improvesystem compatibilityVSAvoidresource allocation flexibility

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent implements dynamic resource allocation where the relay UE device can adaptively select from multiple resource pools based on current channel conditions, traffic demands, and coverage requirements. This dynamic approach maintains compatibility with standardized LTE D2D procedures while providing flexible resource allocation through real-time adjustments.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10412706B2Establishing data relay operation between a relay user equipment (relay-UE) device and an out-of-coverage user equipment (UE) device

Publication Date: 2019.09.10 KYOCERA CORP

AI summary

An in-coverage (InC) relay user equipment (Relay-UE) device selects a resource allocation from a communication resource pool or receives the selected resource allocation from an eNB, and then transmits the selected resource allocation to one or more out-of-coverage (OoC) UE devices. The resource allocation is for a device-to-device (D2D) communication link between the InC Relay-UE device and the OoC UE devices. After receiving the resource allocation, an OoC UE device may relay data to a base station (eNB) by way of the InC Relay-UE, using the allocated transmission resources.