Sub-band Full Duplex Resource Allocation in 5G
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Solution Overview
Problem
Current resource allocation schemes in sub-band full duplex scenarios for 5G wireless communication fail to effectively manage frequency domain resources, leading to reduced coverage and capacity, particularly in scenarios where frequency domain resources cross multiple sub-bands with different transmission directions.
Innovation Solution
The proposed solution involves a UE and BS that dynamically adjust frequency domain resources based on time unit types, either by omitting transmissions across multiple sub-bands, using separate resources in different time units, or adjusting indicated resources according to predefined rules to ensure optimal resource utilization and alignment with sub-band configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency domain resources are allocated across multiple sub-bands with different transmission directions, then resource utilization efficiency is improved, but transmission reliability deteriorates due to coverage reduction on higher frequency bands
Solution Approach 1:
The patent segments frequency domain resources into multiple sub-bands with different transmission directions (downlink, uplink, flexible). By dividing the frequency spectrum into distinct sub-bands, the system can allocate resources more efficiently while managing the reliability challenges of higher frequency bands through targeted resource selection within each sub-band.
Solution Approach 2:
The patent introduces dynamic resource allocation mechanisms where the network can indicate time unit types and adjust frequency domain resources dynamically based on sub-band full duplex configurations. This dynamic adjustment allows the system to adapt resource allocation to current channel conditions and transmission requirements, improving both efficiency and reliability.
2Reliability
If sub-band full duplex scheme is implemented to extend uplink transmission duration, then uplink coverage and capacity are improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring sub-band full duplex parameters and time unit types through higher layer signaling before actual data transmission. This advance configuration establishes the framework for resource allocation, reducing the complexity of real-time decisions while enabling extended uplink transmission duration and improved coverage.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network provides indications of time unit types and sub-band configurations to the UE. This intermediary signaling layer mediates between the complex sub-band full duplex requirements and the simpler UE transmission operations, managing complexity while achieving improved uplink coverage.
3Reliability
If separate frequency resources are used for downlink and uplink in the same time unit, then interference between directions is reduced, but frequency resource efficiency decreases
Solution Approach 1:
The patent applies local quality by allowing different transmission directions in different frequency sub-bands within the same time unit. Instead of uniformly separating downlink and uplink across all frequencies, the system assigns specific sub-bands for specific directions based on local conditions and requirements, reducing interference while maintaining frequency efficiency.
Solution Approach 2:
The patent resolves the interference-efficiency tradeoff by introducing another dimension - the sub-band dimension. Rather than simply separating in frequency or time, the system creates a three-dimensional resource allocation structure (frequency sub-bands × time units × transmission directions), allowing simultaneous downlink and uplink transmissions in different sub-bands within the same time unit, thus reducing interference while maintaining efficiency.
Data Source
AI summary
Embodiments of the present application relate to methods and apparatuses for a resource allocation scheme in a sub-band full duplex scenario. According to an embodiment of the present application, a UE includes a processor and a transceiver coupled to the processor; and the processor is configured: to receive, via the transceiver from a network node, at least one indication indicating at least one frequency domain transmission resource; and to determine a frequency domain resource in a time unit according to a type of the time unit, wherein the frequency domain resource is used for transmitting a physical uplink share channel (PUSCH) transmission, wherein the frequency domain resource is associated with the at least one frequency domain transmission resource, and wherein the type of the time unit comprises a time unit type or a further time unit type.