Subband Full-Duplex Transmission Scheduling for Flexible Resource Allocation
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Solution Overview
Problem
Wireless communications systems face limitations in scheduling multiple transmissions due to constraints on resource block allocation in subband full-duplex operations, particularly in extended reality (XR) and cloud gaming (CG) applications, where network entities are unable to allocate resource blocks within subbands reserved for uplink or downlink transmissions in the same slot.
Innovation Solution
Implementing a set of rules that modify scheduling of multiple transmissions by allowing transmissions to occur in non-consecutive slots or applying frequency shifts to resource allocations, enabling flexible scheduling and efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subband full-duplex operation is implemented with subbands reserved for uplink or downlink transmissions within the same slot, then spectrum utilization is improved, but resource availability for flexible scheduling is reduced
Solution Approach 1:
The frequency spectrum is segmented into different subbands, where some subbands are designated for uplink transmissions and others for downlink transmissions within the same slot. This segmentation enables simultaneous bidirectional communication in different frequency portions, improving spectrum utilization while maintaining scheduling flexibility through subband-level resource allocation.
Solution Approach 2:
Different subbands are assigned different transmission directions (uplink or downlink) based on local requirements. The network can selectively allocate specific subbands to UEs for uplink or downlink transmissions, allowing flexible resource utilization patterns that adapt to varying traffic conditions while maintaining overall spectrum efficiency.
2Productivity
If multiple transmissions are scheduled in consecutive slots, then throughput is improved, but latency for uplink transmissions increases
Solution Approach 1:
The network schedules downlink transmissions in advance in slots before the UE needs to transmit uplink data. By pre-allocating downlink resources and configuring the UE with appropriate timing information, the system enables efficient uplink transmissions without unnecessary delays, reducing uplink latency while maintaining high throughput through coordinated multi-slot scheduling.
3Adaptability or versatility
If frequency shift is applied to subsequent transmissions, then resource allocation flexibility is improved, but scheduling complexity increases
Solution Approach 1:
The scheduling system dynamically adjusts frequency allocations for subsequent transmissions based on the first transmission's characteristics and current network conditions. The network entity can apply frequency shifts to optimize resource utilization while managing complexity through standardized shifting patterns and pre-configured frequency resource pools, balancing flexibility with implementable complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication that a set of occasions for a message occurs over multiple symbols. The multiple symbols may include a set of full-duplex symbols and a set of half-duplex symbols. The UE may select one or more resources for communicating the message via a first occasion of the set of occasions in accordance with a set of rules and based on the first occasion being included in a first slot type or a second slot type. The first slot type may correspond to one or more half-duplex symbols of the set of half-duplex symbols and the second slot type may correspond to one or more full-duplex symbols of the set of full-duplex symbols. The UE may communicate the message using the one or more selected resources.