OOBER Device Control for Full-Duplex Interference
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Solution Overview
Problem
Full-duplex radio communication systems face interference issues due to out-of-band emission, which affects network performance and requires effective mechanisms to control the out-of-band emission reduction (OOBER) function across various network operation conditions.
Innovation Solution
A method and apparatus for a user equipment (UE) in a wireless communication system that includes receiving downlink control information (DCI) for frequency allocation, identifying uplink (UL) and downlink (DL) frequency bands, and using an out-of-band emission reduction (OOBER) device based on the allocation, with the OOBER device enabled or disabled depending on the frequency band edges and operation mode, to manage interference between adjacent bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex radio communication is implemented to increase communication capacity, then spectral efficiency is improved, but out-of-band emission interference between adjacent bands increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the OOBER function based on frequency allocation parameters. When the allocated frequency band corresponds to an edge of a bandwidth part, the OOBER function is enabled to reduce out-of-band emission interference. This conditional parameter adjustment resolves the contradiction by maintaining full-duplex operation while mitigating interference in specific frequency scenarios.
2Object-generated harmful factors
If OOBER device is continuously enabled to reduce out-of-band emission, then interference between adjacent bands is reduced, but device complexity and power consumption increase
Solution Approach 1:
The patent implements dynamics by making the OOBER device operation dynamic rather than static. The device is enabled or disabled based on real-time frequency allocation conditions determined by the network. This dynamic control approach reduces device complexity and power consumption compared to continuous operation, while still effectively reducing interference when needed.
3Productivity
If frequency bands are allocated at band edges to increase resource utilization, then spectrum efficiency is improved, but out-of-band emission interference to adjacent bands increases
Solution Approach 1:
The patent applies preliminary anti-action by proactively enabling the OOBER function before interference occurs. When the network determines that a UE is allocated frequency bands at the edge of a bandwidth part, it preemptively activates the OOBER function to prevent out-of-band emission interference to adjacent bands. This preventive approach allows efficient spectrum utilization while protecting adjacent bands from interference.
Data Source
AI summary
A method of transmitting and receiving a signal by a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving downlink control information (DCI) including frequency allocation information from a base station (BS), identifying frequency bands allocated as an uplink (UL) band and a downlink (DL) band based on the frequency allocation information, and transmitting a UL signal through a transmitter of the UE based on the DCI. The transmitter of the UE includes an out-of-band emission reduction (OOBER) device, and the OOBER device is enabled based on whether the allocated frequency bands correspond to edges of a bandwidth part (BWP).