HD-FDD Mode Switching for Wireless Resource Overlap

Solution Overview

Problem

Future wireless communications networks face challenges in efficiently supporting a wide range of devices with diverse data traffic profiles and requirements, such as high data rate, low latency, and high reliability, due to the increasing complexity and variability in device types and applications.

Innovation Solution

Implementing a Half Duplex Frequency Division Duplex (HD-FDD) mode of operation in communications devices, which allows for independent switching between transmission and reception, reducing hardware complexity and enabling efficient use of radio resources by determining whether to transmit or receive based on overlapping uplink and downlink resource timing and signal characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If Full Duplex Frequency Division Duplex (FD-FDD) mode is used to enable simultaneous transmission and reception, then communication reliability is improved, but hardware complexity increases due to requirement for separate transmit and receive chains

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidhardware complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by enabling the communications device to dynamically switch between full duplex and half duplex modes based on real-time conditions. The device determines whether to simultaneously transmit and receive signals or to switch to half duplex mode when overlap between uplink and downlink resources is detected, allowing adaptive adjustment of operational mode to balance reliability and hardware complexity requirements

Inventive Principle:

Principle #15Dynamics

2Device complexity

If Half Duplex Frequency Division Duplex (HD-FDD) mode is used to reduce hardware complexity, then device complexity is reduced, but radio resource utilization efficiency deteriorates due to inability to simultaneously transmit and receive

Engineering Contradiction:

Improvehardware complexityVSAvoidradio resource utilization efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies dynamics by enabling the communications device to dynamically switch between full duplex and half duplex modes based on real-time conditions. The device determines whether to simultaneously transmit and receive signals or to switch to half duplex mode when overlap between uplink and downlink resources is detected, allowing adaptive adjustment of operational mode to balance reliability and hardware complexity requirements

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies parameter changes by modifying the operational parameters of the communications device based on detected signal characteristics and resource overlap conditions. The device adjusts its transmission and reception parameters dynamically, switching between modes and adjusting timing relationships to optimize radio resource utilization while maintaining hardware simplicity

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If uplink and downlink resources overlap in time in HD-FDD mode, then independent switching between transmission and reception is enabled, but resource scheduling flexibility is reduced

Engineering Contradiction:

Improvehardware complexityVSAvoidresource scheduling flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by enabling the communications device to dynamically switch between full duplex and half duplex modes based on real-time conditions. The device determines whether to simultaneously transmit and receive signals or to switch to half duplex mode when overlap between uplink and downlink resources is detected, allowing adaptive adjustment of operational mode to balance reliability and hardware complexity requirements

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies preliminary action by having the communications device determine and evaluate resource overlap conditions before actual transmission and reception operations. The device assesses whether uplink and downlink resources overlap in time and takes preliminary decisions on mode switching to avoid conflicts, enabling proactive resource management

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20230254105A1Methods, communications devices and infrastructure equipment

Publication Date: 2023.08.10 SONY GROUP CORP

AI summary

A method of operating a device in a wireless network is provided. The device operates in accordance with a Half Duplex Frequency Division Duplex, HD-FDD, mode of operation. The method comprises determining that the device is to transmit an uplink signal to the wireless network in a set of uplink resources, determining that the device is to receive a downlink control signal in a set of downlink resources, determining that the set of uplink resources at least partially overlaps in time with the set of downlink resources, and, depending on a characteristic of the uplink signal and/or a characteristic of the downlink signal, either transmitting the uplink signal in the set of uplink resources and not receiving the downlink signal in the set of downlink resources, or receiving the downlink signal in the set of downlink resources and not transmitting the uplink signal in the set of uplink resources.