Remote UE D2D Transmission Control via Duplex Capability
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Solution Overview
Problem
In device-to-device (D2D) communication, remote UEs often miss important information due to half-duplex restrictions, which prevent them from receiving transmissions from relay UEs when their own transmissions contend, leading to inefficient radio resource usage.
Innovation Solution
A method where a remote UE determines whether receiving a signal from a relay UE is restricted by its own transmission, and based on this, it either performs or avoids transmitting to the relay UE, utilizing duplex information to assess full or extended duplex capabilities and resource pool overlaps to prioritize receiving data from the relay UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a remote UE performs transmission to a relay UE, then the remote UE can send data, but the remote UE cannot receive transmission from the relay UE due to half-duplex restriction
Solution Approach 1:
The remote UE dynamically adjusts its operation mode between transmission and reception based on the duplex capability of the relay UE. When the relay UE supports full duplex, the remote UE can simultaneously transmit and receive; when the relay UE supports only half duplex, the remote UE switches to reception-only mode to avoid self-interference, thus adapting to different operational conditions to maximize information reception.
Solution Approach 2:
The system changes the operational parameters of the remote UE based on the relay UE's duplex capability. The remote UE monitors whether the relay UE supports full duplex or half duplex and accordingly adjusts its transmission/reception behavior, resource pool selection, and timing to ensure it can receive important information from the relay UE without being restricted by half-duplex limitations.
2Reliability
If the remote UE prioritizes receiving transmission from the relay UE, then information reception is improved, but radio resource efficiency deteriorates due to half-duplex restrictions
Solution Approach 1:
The remote UE dynamically selects between transmission and reception priorities based on the relay UE's duplex capability and current communication needs. When full duplex is supported, both transmission and reception can occur simultaneously, maximizing resource efficiency. When half duplex is required, the system dynamically switches to reception priority mode only when necessary, otherwise allowing normal transmission to maintain overall resource efficiency.
Solution Approach 2:
The system adjusts operational parameters including resource pool selection, timing configurations, and transmission power based on the determined duplex capability. These parameter changes enable the remote UE to optimize between reliable information reception and efficient radio resource utilization by adapting its behavior to the specific capabilities of the relay UE and current network conditions.
3Ease of operation
If the remote UE transmits data to the relay UE without checking duplex capability, then transmission simplicity is maintained, but reception reliability deteriorates due to potential half-duplex conflicts
Solution Approach 1:
The remote UE performs preliminary determination of the relay UE's duplex capability before engaging in data transmission. This preliminary action involves checking whether the relay UE supports full duplex or half duplex, and based on this information, the remote UE configures its transmission and reception parameters in advance to avoid half-duplex conflicts, ensuring both transmission simplicity and reception reliability.
Solution Approach 2:
The relay UE's duplex capability information acts as an intermediary parameter that mediates between the remote UE's transmission desires and reception needs. By using this intermediary information, the remote UE can make informed decisions about whether to transmit, when to transmit, and how to configure its radio resources, thereby maintaining both operational simplicity and reception reliability without complex real-time arbitration.
Data Source
AI summary
In a D2D operation method performed by a remote terminal in a wireless communication system, the present invention determines whether receiving a signal transmitted from a relay terminal by means of transmission of a signal from the remote terminal is restricted; and transmits a signal to the relay terminal on the basis of the determination, wherein in the case that receiving a signal transmitted from the relay terminal by means of transmission of a signal from the remote terminal is not restricted, the present invention transmits a signal to the relay terminal, and in the case that receiving a signal transmitted from the relay terminal by means of transmission of a signal from the remote terminal is restricted, the present invention does not transmit a signal to the relay terminal.