User Equipment Sub-band Full Duplex Capability Signaling
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Solution Overview
Problem
In wireless communication systems, sub-band full-duplex (SBFD) operations face challenges due to self-interference suppression and cancellation, particularly in user equipment (UE) with limited processing power and physical separation, leading to unpredictable reliability and traffic throughput.
Innovation Solution
UEs transmit capability information indicating SBFD support conditions to network nodes, allowing for scheduling of SBFD communications based on conditions such as antenna panel usage, subcarrier separation, and transmission parameters, ensuring reduced self-interference and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SBFD operations are implemented in UE with limited processing power and physical separation, then spectral efficiency is improved, but self-interference suppression becomes difficult leading to unpredictable reliability
Solution Approach 1:
The patent changes the parameter of frequency separation by introducing sub-band division where UL and DL communications occur in different frequency sub-bands rather than the entire band. This frequency domain separation reduces self-interference while maintaining spectral efficiency, resolving the contradiction between improved productivity and worsened reliability.
Solution Approach 2:
The patent segments the frequency band into multiple sub-bands, with specific sub-bands allocated for uplink and downlink communications separately. This segmentation allows simultaneous UL/DL operations with reduced interference, enabling spectral efficiency improvement while maintaining reliability through physical separation in the frequency domain.
2Productivity
If SBFD operations are implemented in UE with limited processing power, then network resource utilization is improved, but self-interference cancellation becomes difficult
Solution Approach 1:
The patent replaces the need for complex digital signal processing-based self-interference cancellation with a simpler frequency domain separation approach. By allocating different sub-bands for UL and DL, the system achieves interference reduction through frequency planning rather than complex processing, improving network resource utilization while reducing device complexity.
3Reliability
If UE communicates with network node based on SBFD support conditions, then communication reliability is improved, but capability information signaling is required
Solution Approach 1:
The patent implements preliminary action by having the UE transmit capability information indicating SBFD support conditions before actual SBFD communications begin. This advance signaling allows the network node to configure appropriate parameters and allocate resources knowing the UE's capabilities, ensuring reliable communication while the information loss is minimal and one-time.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, capability information indicating one or more sub-band full-duplex (SBFD) support conditions for the UE. The UE may communicate with the network node based at least in part on the one or more SBFD support conditions for the UE. Numerous other aspects are described.