Subband Full Duplex Configuration for Self-Interference Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing self-interference during full duplex operations, particularly in subband configurations, which affect throughput and efficiency.
Innovation Solution
User equipment (UE) reports a candidate subband full duplex (SBFD) pattern to the network, which may include parameters such as the number and location of subbands, guard bands, and bandwidth, allowing for simultaneous uplink and downlink signaling based on measured self-interference thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operations are implemented in wireless communication systems, then spectral efficiency and throughput are improved, but self-interference between uplink and downlink signals increases
Solution Approach 1:
The patent divides the frequency spectrum into multiple subbands, allowing different subbands to be allocated for uplink and downlink transmissions. This segmentation enables full duplex operations by separating interfering signals into distinct frequency segments, thereby reducing self-interference while maintaining spectral efficiency.
Solution Approach 2:
The patent applies different quality characteristics to different subbands by configuring specific subband patterns for uplink and downlink based on local interference conditions. Each subband can be optimized independently with appropriate guard bands and power levels, allowing the system to achieve full duplex operation while managing self-interference through localized parameter adjustments.
2Productivity
If subband configurations are made dynamic to reduce self-interference, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic subband configuration where uplink and downlink subband allocations can change over time based on channel conditions and interference measurements. The network can configure different subband patterns dynamically, allowing the system to adapt to varying conditions and optimize communication efficiency while managing complexity through structured configuration mechanisms.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network monitors self-interference levels and adjusts subband configurations accordingly. Based on measured interference and communication performance, the network dynamically reconfigures subband patterns, guard bands, and power levels to maintain optimal efficiency while managing system complexity through closed-loop control.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a subband full duplex (SBFD) pattern report, indicating a candidate SBFD pattern. The candidate SBFD pattern may indicate a candidate number of downlink or uplink subbands, a number of or location of guard bands, frequency locations of the uplink or downlink subbands or guard bands, a total uplink and downlink bandwidth, time locations of SBFD symbols or slots, transmit/receive beam pairs, transmission configuration indicator (TCI) state pairs or timing, or any combination thereof. The network may configure the UE with an SBFD pattern based on receiving the SBFD pattern report (e.g., which may or may not be the same as the reported candidate SBFD pattern).