Uplink Transmission Resource Allocation in Full Duplex Systems
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Solution Overview
Problem
Current full-duplex communication systems face challenges in optimizing uplink transmission efficiency due to limited time duration allocation in Time Division Duplex (TDD) systems, leading to reduced coverage and increased latency, particularly in Non-Overlapping Sub-Band Full Duplex (NOSB-FD) configurations for 5G and New Radio (NR) networks.
Innovation Solution
The implementation of enhanced rules for determining available slots for Physical Uplink Shared Channel (PUSCH) and Physical Uplink Control Channel (PUCCH) repetitions, as well as Sounding Reference Signal (SRS) transmissions, based on specific frequency and time domain resource allocations, to improve duplex operation and resource utilization in NOSB-FD systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Time Division Duplex (TDD) systems are used with limited time duration allocation, then system simplicity is maintained, but uplink transmission efficiency deteriorates and latency increases
Solution Approach 1:
The patent merges downlink and uplink transmissions into the same time slot by dividing the frequency band into sub-bands, allowing simultaneous full-duplex operation. This combines previously separate TDD uplink and downlink operations into a unified full-duplex mode, resolving the contradiction between maintaining system simplicity and improving uplink transmission efficiency.
Solution Approach 2:
The system dynamically switches between TDD and full-duplex modes based on traffic conditions and network requirements. This dynamic adaptation allows the system to optimize uplink transmission efficiency when needed while maintaining the simplicity of TDD when appropriate, addressing the latency and efficiency contradiction.
2Productivity
If full-duplex operation is implemented in the same symbol, then spectral efficiency is improved, but interference management complexity increases
Solution Approach 1:
The frequency band is segmented into multiple sub-bands, with specific sub-bands allocated for uplink and downlink transmissions within the same time slot. This segmentation reduces self-interference between simultaneous transmissions while maintaining spectral efficiency, resolving the contradiction between improved productivity and reduced device complexity.
Solution Approach 2:
Different sub-bands are assigned different transmission directions (uplink or downlink) based on local frequency characteristics and interference conditions. This local optimization of frequency resource allocation improves spectral efficiency while managing interference complexity through targeted sub-band management.
3Reliability
If more time resources are allocated for uplink transmission, then coverage is improved, but downlink transmission capacity deteriorates
Solution Approach 1:
The patent transitions from time-domain resource allocation (TDD) to frequency-domain resource allocation by introducing sub-band division. This dimensional change allows simultaneous uplink and downlink transmissions in the same time slot through frequency separation, improving coverage without sacrificing downlink capacity.
Data Source
AI summary
Various embodiments herein provide techniques related to a process to be performed by an electronic device. The process may include identifying one or more symbols or slots of a plurality of symbols or slots that are unavailable for transmission of an uplink signal based on an identification that: a symbol related to transmission of the signal overlaps a non-overlapped sub-band frequency-division (NOSB-FD) symbol; and one or more physical resource blocks (PRBs) related to transmission of the signal overlaps a frequency region related to transmission of the NOSB-FD symbol. The technique may further include transmitting the signal in one or more symbols or slots of the plurality of symbols or slots that are not identified as unavailable for transmission of the signal. Other embodiments may be described and/or claimed.