Per-RB Set Slot Formats for Subband Full-Duplex Coordination
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Solution Overview
Problem
Wireless communications systems lack efficient mechanisms for coordinating time and frequency resources for full-duplex communication, leading to inefficiencies and potential communication errors.
Innovation Solution
Implementing signaling-based mechanisms for network entities and user equipment (UE) to configure and coordinate resource block (RB) sets with unique indexes, indicating slot formats for full-duplex operation and guard bands, ensuring mutual understanding of resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is implemented without per-RB set slot format configuration, then system capacity and spectral efficiency can be improved, but communication errors increase due to lack of coordinated time and frequency resource allocation
Solution Approach 1:
The patent segments the frequency resources into multiple resource block sets (RB sets), each with its own slot format configuration. This allows different parts of the frequency spectrum to have different time domain allocations, enabling full-duplex operation in some bands while maintaining reliability through coordinated resource allocation in other bands. The segmentation of resources into manageable sets with unique indexes enables precise control and reduces communication errors.
Solution Approach 2:
The patent applies local quality by configuring slot formats specifically for each RB set based on local traffic conditions and interference characteristics. Each RB set can have customized slot format configurations (e.g., different downlink/uplink symbol ratios) tailored to its specific requirements, allowing optimal full-duplex operation where needed while maintaining traditional TDD operation where interference management is critical.
2Reliability
If per-RB set slot format configuration is implemented, then time and frequency resource coordination is improved, but device complexity increases due to additional signaling and processing requirements
Solution Approach 1:
The patent applies preliminary action by configuring slot formats for RB sets in advance through higher layer signaling (RRC configuration). The network entity pre-configures the slot format indications for different RB sets, allowing the UE to understand and execute the resource allocation without complex real-time processing. This preliminary configuration reduces the complexity of real-time coordination while maintaining reliable resource allocation.
Solution Approach 2:
The patent implements dynamics by allowing flexible switching between different slot format configurations for different RB sets based on changing traffic conditions. The slot format indications can be dynamically adjusted through MAC CE signaling, enabling the system to adapt to varying full-duplex operation requirements while maintaining a manageable complexity level through standardized signaling procedures.
3Productivity
If flexible resource adaptation is enabled for full-duplex operation, then spectral efficiency is enhanced, but scheduling complexity increases
Solution Approach 1:
The patent segments the scheduling task into per-RB set configurations, where each RB set has its own slot format indications. This segmentation allows the scheduler to independently optimize each frequency band without overwhelming complexity, as each segment can be configured and adjusted separately based on local spectral conditions and traffic patterns.
Solution Approach 2:
The patent applies parameter changes by modifying slot format parameters (such as the number of downlink and uplink symbols) for different RB sets based on spectral efficiency requirements. The system can dynamically adjust these parameters through standardized signaling mechanisms, enabling flexible resource adaptation while keeping the scheduling complexity manageable through parameter-based control rather than complex decision algorithms.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some aspects, a user equipment (UE) and a network entity may support one or more signaling-based mechanisms according to which the network entity may inform the UE of which time and frequency resources may be used for full-duplex communication. The network entity transmit a first message to configure multiple resource block (RB) sets for the UE, where each RB set is associated with unique identifying information. To inform the UE of which time and frequency resources may be used for full-duplex communication, the network entity may transmit a second message that indicates one or more slot formats on a per RB set basis. As such, the network entity may schedule the UE for full-duplex communication in accordance with indicating that overlapping symbols of a first RB set and a second RB set are allocated for uplink and downlink, respectively.