Full-Duplex User Equipment Interference Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting full-duplex operations for user equipment (UEs), particularly in managing interference between simultaneous uplink and downlink transmissions and in switching between half-duplex and full-duplex communication resources.
Innovation Solution
The proposed solution involves a UE that communicates with a network entity using full-duplex techniques by transmitting an indication of its hardware capabilities, including the quantities of transmit and receive chains for half-duplex and full-duplex modes. The UE identifies fixed subbands or component carriers for uplink transmissions and sets up guard bands to prevent interference, and it also defines a guard interval for switching between communication modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If guard bands are introduced to prevent interference between uplink and downlink, then interference is reduced, but frequency resources are consumed
Solution Approach 1:
The frequency spectrum is segmented into distinct uplink and downlink subbands with guard bands separating them. This segmentation allows the system to prevent interference between simultaneous uplink and downlink transmissions by creating isolated frequency regions, while still utilizing the majority of available spectrum for data transmission.
Solution Approach 2:
The system dynamically adjusts the width and positioning of guard bands based on channel conditions, interference levels, and traffic requirements. By changing the parameter of guard band configuration rather than using fixed allocations, the system optimizes the balance between interference protection and frequency resource utilization.
2Productivity
If the UE reports detailed hardware capabilities to the network entity, then the network can optimize resource allocation, but signaling overhead increases
Solution Approach 1:
The UE reports only the essential hardware capability parameters needed for full-duplex operation (such as number of transmit and receive chains) rather than providing complete detailed specifications. This partial reporting approach provides sufficient information for the network to optimize resource allocation while minimizing the signaling overhead.
3Adaptability or versatility
If the UE switches between half-duplex and full-duplex modes, then communication flexibility is improved, but switching time and complexity increase
Solution Approach 1:
The UE pre-configures its radio chains and identifies available full-duplex resources before actual mode switching is required. By performing preliminary configuration and capability assessment, the UE reduces the time and complexity of actual switching operations when communication conditions change.
Solution Approach 2:
The system implements dynamic mode switching where the UE can transition between half-duplex and full-duplex operations based on real-time channel conditions, traffic requirements, and network scheduling. This dynamic adaptability allows the system to optimize performance while managing switching overhead through intelligent decision-making.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques may allow for a user equipment (UE) to communicate with a network entity using full-duplex communication techniques. For example, the UE may transmit, to the network entity, an indication of respective quantities of transmit chains and receive chains at the UE supports for full-duplex and half-duplex communications. In some cases, the UE may identify one or more fixed subbands within a component carrier (CC) or one or more fixed CCs that are allocated for uplink transmissions, and the UE may identify one or more guard bands between the fixed uplink subbands or uplink CCs and one or more downlink subbands or downlink CCs, respectively. In some examples, the UE may identify a guard interval between half-duplex resources and full-duplex resources to allow time for the UE to switch between the half-duplex resources and the full-duplex resources.