Uplink Transmission in Full-Duplex Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently multiplexing radio resources based on different numerologies for various usage scenarios in next-generation wireless access networks, particularly for uplink transmission in full-duplex communication.
Innovation Solution
The method involves determining the format of a symbol as downlink, uplink, or flexible based on TDD configuration information, receiving configuration information for uplink and downlink subbands for full-duplex communication, and transmitting uplink data in a reconfiguration symbol with limited frequency resources within the uplink subband.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is applied to enable simultaneous uplink and downlink transmission, then spectral efficiency and data transmission rate are improved, but interference between uplink and downlink signals increases
Solution Approach 1:
The frequency band is divided into multiple subbands, with specific subbands allocated for uplink transmission and others for downlink transmission simultaneously. This segmentation allows full-duplex operation while isolating uplink and downlink signals in different frequency regions, reducing mutual interference.
Solution Approach 2:
Different parts of the frequency spectrum are assigned different transmission directions (uplink or downlink) within the same time slot. By locally optimizing the transmission direction for each subband, the system achieves full-duplex capability while managing interference through frequency-domain separation.
2Adaptability or versatility
If flexible frame structures are designed to meet diverse usage scenario requirements, then adaptability is improved, but system complexity increases
Solution Approach 1:
The frame structure is designed to be dynamic and configurable, allowing the network to adapt the allocation of uplink and downlink subbands based on real-time traffic conditions and usage scenarios. This dynamic flexibility enables the system to meet diverse requirements without requiring completely different frame structures for each scenario.
Solution Approach 2:
A single unified frame structure design supports multiple usage scenarios (eMBB, mMTC, URLLC) by flexibly configuring subband allocations and transmission parameters. This universal approach eliminates the need for separate dedicated frame structures for each scenario, reducing overall system complexity while maintaining high adaptability.
3Productivity
If radio resources are multiplexed based on different numerologies for various usage scenarios, then resource utilization efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The available radio resources are segmented into multiple subbands with different numerologies (subcarrier spacings, TTI lengths) allocated to different usage scenarios. This segmentation allows efficient resource utilization for each scenario while maintaining a unified scheduling framework that manages the complexity of multi-numerology operation.
Data Source
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AI summary
Provided are a method and device for transmitting an uplink. The method may include: based on time division duplex (TDD) configuration information received from a base station, determining a format of a symbol as one of a downlink symbol, an uplink symbol, and a flexible symbol; receiving configuration information on an uplink subband and a downlink subband for full duplex communication; receiving additional information for uplink transmission in a reconfiguration symbol in which the uplink subband is configured, among symbols, formats of which have been determined as downlink symbols; and transmitting an uplink in the reconfiguration symbol on the basis of the additional information for uplink transmission in the reconfiguration symbol, wherein a frequency resource for uplink transmission is limited to an area within a frequency domain of the uplink subband.