Subband Full Duplex UE Configuration in Half Duplex Cells
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Solution Overview
Problem
Wireless communication systems face challenges in supporting subband full duplex capable user equipment (UE) in a half duplex cell mode, as existing technologies lack mechanisms for the UE to determine the necessary resources for full duplex communications.
Innovation Solution
The network configures the UE with a time duration pattern and indicates, via control signaling, which time intervals are designated for full duplex operations. The network also specifies the frequency resources, such as uplink and downlink subbands, for full duplex communication during these intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network operates in half duplex mode, then device complexity is reduced, but productivity decreases due to inability to perform simultaneous uplink and downlink communications
Solution Approach 1:
The system dynamically switches between half-duplex and full-duplex modes based on network configuration and traffic requirements. The UE can operate in half-duplex mode for basic operations, reducing complexity, while enabling full-duplex capability when needed for improved productivity through simultaneous uplink and downlink communications.
Solution Approach 2:
The patent changes the operational parameter of duplex mode from fixed to variable. The network configures the UE with specific time intervals and frequency resources to switch between half-duplex and full-duplex modes, allowing the system to optimize between complexity and productivity based on current network conditions.
2Productivity
If full duplex communication is enabled, then productivity increases through simultaneous uplink and downlink signaling, but device complexity increases due to additional resource management requirements
Solution Approach 1:
The patent segments the frequency spectrum into different subbands, with specific subbands allocated for uplink and downlink communications during full-duplex intervals. This segmentation allows simultaneous transmissions without interference while managing complexity through structured resource allocation.
Solution Approach 2:
The network performs preliminary configuration by indicating time intervals and frequency resources for full-duplex operations before the UE actually performs simultaneous communications. This advance configuration reduces the complexity burden on the UE during actual full-duplex operation.
3Adaptability or versatility
If control signaling is used to indicate full duplex time intervals and frequency resources, then adaptability increases, but loss of time increases due to additional signaling overhead
Solution Approach 1:
The control signaling mechanism serves multiple functions: it indicates time intervals for full-duplex operations, specifies frequency resources (uplink and downlink subbands), and configures the operational mode. This multi-functionality reduces the need for separate signaling messages, minimizing time loss while maintaining high adaptability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A network may configure a user equipment (UE) with a time duration pattern, and may further indicate (e.g., via control signaling) which time intervals (e.g., slots or symbols) of the time duration pattern are designated as full duplex time intervals. The network may indicate a full duplex time interval on a configured downlink symbol, a configured uplink symbol, or a configured flexible symbol. The network may further indicate frequency resources (e.g., an uplink subband, a downlink subband, etc.) via which the UE is to perform the full duplex communication during the indicated time intervals. The control signaling may include an indication of a full duplex mode for each of the time intervals. Multiple transmission receive points (TRPs) may communicate to determining which TRP will schedule uplink signaling and which TRP will schedule downlink signaling in the full duplex time interval.