Full Duplex Network Uplink Interference Management
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Solution Overview
Problem
Full duplex telecommunication networks face significant performance degradation due to interference on UE uplink reception caused by interfering downlink transmissions from adjacent cells, which existing technologies struggle to manage effectively.
Innovation Solution
The method involves reserving special radio resources for uplink transmission only and allocating these resources to base stations serving UEs that may be affected by interference from adjacent cells, thereby improving the performance of mobile FD networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex transmission is implemented to enable simultaneous uplink and downlink on the same frequency band, then network capacity and spectral efficiency are improved, but interference from adjacent cell downlink transmissions degrades uplink reception performance
Solution Approach 1:
The patent segments radio resources by introducing a dedicated uplink-only frequency band (guard band) separated from the full duplex band. This segmentation isolates uplink transmissions in specific resource blocks, preventing interference from adjacent cell downlink transmissions while maintaining full duplex operation in other bands.
Solution Approach 2:
The patent introduces an intermediary frequency band (guard band) that acts as a buffer between the full duplex band and other uplink bands. This intermediary zone absorbs or reflects interfering signals, protecting uplink receptions from adjacent cell interference through frequency isolation.
2Reliability
If dedicated uplink-only radio resources are allocated to protect against interference, then uplink reception performance is improved, but available resources for full duplex transmission are reduced
Solution Approach 1:
The patent applies partial protection by allocating dedicated uplink-only resources only to user equipment experiencing interference in the uplink extended edge area, while other UEs continue to use full duplex resources. This selective approach provides necessary protection without unnecessarily reducing overall resource availability.
Solution Approach 2:
The patent implements localized resource allocation where different radio resource configurations are applied to different geographic areas and user equipment. UEs in interference-prone areas receive dedicated uplink-only resources, while UEs in other areas utilize full duplex resources, optimizing resource utilization based on local conditions.
Data Source
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Figure 3A~3C
AI summary
A method for managing a full duplex mobile telecommunication network, comprising: - having a base station (BS(1)) measuring (205) the power of downlink transmissions received by said base station from adjacent base stations (BS(2)); - having said base station (BS(1)) measuring (210) the power of uplink transmissions received by said base station from at least one served user equipment (UE(1), UE(2), UE(3), UE(4)); - having said base station (BS(1)) comparing (215) the measured power of downlink transmissions with the measured power of uplink transmissions; - if the measured power of an uplink transmission from a served user equipment is lower than the measured power of downlink transmissions by a corresponding amount, carrying out the following operation: - having said base station (BS(1)) allocating (255) for the uplink transmission from said served user equipment, corresponding first dedicated uplink radio resources, said first dedicated uplink radio resources being radio resources which are reserved only for uplink transmission, said first dedicated uplink radio resources, when allocated to said base station (BS(1)), being not usable for downlink transmissions by further base stations (BS(2)) adjacent to said base station (BS(1)), and - having said base station (BS(1)) assigning said allocated first dedicated uplink radio resources to said served user equipment for uplink transmission from the served user equipment toward said base station (BS(1)).