Half-Duplex Communication Devices for Uplink Collision Handling
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Solution Overview
Problem
Future wireless communications networks face challenges in efficiently handling intra-UE HD-FDD collisions due to half-duplex devices' inability to simultaneously transmit and receive, which can impact latency and reliability requirements for services like URLLC.
Innovation Solution
A method for a communications device to select and prioritize communication resources based on priority indications and quality of service requirements, allowing it to receive high-priority downlink data while refraining from transmitting on conflicting uplink resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a half-duplex device transmits uplink data using first uplink communication resources, then uplink data transmission is enabled, but the device cannot simultaneously receive downlink data on overlapping second downlink communication resources
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the operational state of communication resources based on priority levels. When a collision is detected, the device changes the state of the downlink resource from 'receive' to 'skip' if the downlink priority is higher, or changes the uplink resource state from 'transmit' to 'skip' if uplink priority is higher. This parameter-based state adjustment resolves the contradiction by enabling the device to adaptively prioritize one function over the other based on service requirements.
2Reliability
If the device prioritizes receiving downlink data on second downlink communication resources during a collision, then downlink data reception is ensured, but uplink data transmission on first uplink communication resources is prevented
Solution Approach 1:
The patent uses parameter changes to dynamically control resource selection based on priority indicators. The device compares priority parameters of colliding resources and changes the operational parameter (transmit/receive/skip) accordingly. This allows the system to flexibly prioritize downlink reception when needed while maintaining uplink capability when priorities allow, resolving the contradiction through adaptive parameter adjustment.
3Reliability
If the device refrains from transmitting uplink data to avoid collision, then downlink data reception is possible, but uplink transmission resources are wasted
Solution Approach 1:
The patent minimizes resource loss through intelligent parameter-based decision making. Instead of always refraining from uplink transmission, the device only skips uplink resources when the priority parameter indicates downlink data is more critical. When priorities are equal or uplink has higher priority, the device maintains normal uplink transmission. This selective parameter adjustment reduces unnecessary resource wastage while ensuring reliable downlink reception when truly needed.
4Device complexity
If the device selects communication resources without priority consideration, then resource selection is simple, but collision resolution becomes complex and may violate latency requirements
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority indicators for different communication resources before collisions occur. The network assigns priority levels to uplink and downlink resources in advance, and the device stores these priority parameters. When a collision is detected, the device simply compares the pre-stored priority parameters and acts accordingly, rather than performing complex real-time analysis. This preliminary preparation significantly reduces collision resolution complexity and enables rapid response to meet stringent latency requirements.
5Reliability
If the device implements priority-based collision resolution, then service reliability is improved, but device complexity increases due to priority detection and comparison mechanisms
Solution Approach 1:
The patent manages device complexity through efficient parameter-based decision making. The priority indicator is a simple numerical or categorical parameter that can be easily stored and compared. The collision resolution logic reduces to a straightforward comparison operation: if priority(downlink) > priority(uplink), then skip uplink; otherwise, proceed with uplink transmission. This parameter-based approach achieves high service reliability for different QoS requirements while keeping the implementation complexity manageable through simple comparative logic.
Data Source
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AI summary
A method of operating a communications device in a wireless communications network, the method comprising: selecting first uplink communication resources of an uplink of a wireless access interface for transmitting uplink data to an infrastructure equipment of the wireless communications network, selecting second downlink communication resources of a downlink of the wireless access interface for receiving downlink data transmitted by the infrastructure equipment of the wireless communications network, detecting a collision whereby, in accordance with the capabilities of the communications device, the communications device cannot both transmit signals using the first uplink communication resources and receive and decode signals transmitted using the second downlink communication resources, in response to detecting the collision, determining whether the second downlink communication resources are associated with a priority which is higher than a priority associated with the first uplink communication resources, and if the second downlink communication resources are associated with a priority which is higher than the priority associated with the first uplink communication resources, receiving the downlink data using the second downlink communication resources, and refraining from transmitting the uplink data using the first uplink communication resources.