Full-Duplex Scheduling via Group Common DCI Signaling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing semi-persistent resources across multiple user equipment (UEs) for full-duplex scheduling, leading to interference and reduced throughput due to the lack of clear indication of duplexing states in existing multiple-access technologies.
Innovation Solution
The method involves receiving configuration information and an indication to activate semi-persistent resources across UEs, using group common downlink control information signaling to identify sets of parameters for full-duplex or half-duplex communication modes, allowing for appropriate parameter selection based on duplexing states, and scheduling resources on non-contiguous sub-bands and component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-persistent resources are scheduled across multiple UEs without clear duplexing state indication, then resource utilization is simplified, but interference increases and throughput decreases
Solution Approach 1:
The patent introduces group common downlink control information as an intermediary signaling mechanism that carries explicit duplexing state indications for multiple UEs. This mediator enables the base station to communicate duplexing states to UEs without requiring separate dedicated signaling for each UE, thus reducing complexity while maintaining throughput through proper interference management.
Solution Approach 2:
The patent changes the parameter space by introducing explicit duplexing state indication fields in the group common downlink control information. This parameter change allows the system to distinguish between full-duplex and half-duplex modes for different UEs, enabling appropriate parameter selection (such as guard bands, power control) to manage interference and maintain throughput.
2Productivity
If group common downlink control information is used to activate semi-persistent resources across multiple UEs, then signaling efficiency improves, but the need for parameter identification based on duplexing states increases complexity
Solution Approach 1:
The patent segments the parameter identification process by associating specific parameter sets with specific duplexing states. Instead of requiring UEs to determine all parameters from scratch, the system pre-defines parameter combinations for full-duplex and half-duplex modes, allowing UEs to simply select the appropriate pre-configured parameter set based on the indicated duplexing state.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple sets of communication parameters corresponding to different duplexing states before actual communication occurs. This allows UEs to quickly identify and apply the correct parameters without real-time complex calculations, improving signaling efficiency while keeping UE processing complexity manageable.
3Productivity
If full-duplex communication is enabled across multiple UEs, then spectral efficiency increases, but interference management becomes more difficult
Solution Approach 1:
The patent applies local quality by enabling full-duplex operation only in specific spatial and frequency regions where interference is manageable. Through group common downlink control information, the system identifies which UEs can operate in full-duplex mode and assigns appropriate resources, allowing spectral efficiency gains in favorable conditions while avoiding interference problems in less suitable environments.
Solution Approach 2:
The patent converts the harmful effect of interference into a beneficial feature by using interference awareness to guide resource allocation. The base station utilizes knowledge of which UEs are in full-duplex mode and their respective interference characteristics to dynamically adjust guard bands, power levels, and resource assignments, transforming potential interference into a factor that optimizes overall system performance.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive configuration information for configuring a plurality of semi-persistent resources for a plurality of UEs, the plurality of semi-persistent resources including one or more semi-persistent resources configured for the first UE. The UE may receive an indication to activate the plurality of semi-persistent resources across the plurality of UEs. The UE may communicate, based at least in part on the indication, using the one or more semi-persistent resources. Numerous other aspects are described.