SBFD Transmission Direction Prioritization for Collision Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in handling collisions between uplink and downlink transmissions in sub-band full duplex (SBFD) mode, leading to inefficiencies and increased latency due to unscheduled or semi-static conflicts.
Innovation Solution
A method for a wireless device to determine prioritized transmission directions based on prioritization rules for scheduled transmissions across serving cells, allowing it to refrain from conflicting uplink or downlink transmissions in SBFD mode, thereby resolving collisions and enhancing operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-band full duplex (SBFD) mode is used to allow simultaneous uplink and downlink transmissions, then spectral efficiency and resource utilization are improved, but transmission collisions and interference between uplink and downlink occur
Solution Approach 1:
The patent segments the frequency spectrum into multiple sub-bands, allowing different sub-bands to operate in different directions (uplink or downlink) simultaneously. This segmentation resolves the collision problem by spatially separating conflicting transmissions in the frequency domain while maintaining overall SBFD operation.
Solution Approach 2:
The patent implements dynamic sub-band direction indication where the network can dynamically configure and switch the transmission direction of specific sub-bands based on traffic conditions. This dynamic adjustment allows the system to adapt to changing requirements and avoid collisions by reconfiguring sub-band directions in real-time.
2Device complexity
If semi-static transmission directions are used for simplicity, then device complexity is reduced, but latency increases due to unscheduled conflicts
Solution Approach 1:
The patent introduces dynamic sub-band direction indication that allows the network to flexibly adjust transmission directions on a per-sub-band basis. This dynamic approach enables faster adaptation to changing traffic conditions compared to semi-static configurations, thereby reducing latency while maintaining manageable device complexity through standardized procedures.
3Reliability
If dynamic sub-band direction indication is implemented, then transmission collision resolution is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent implements a feedback mechanism where the network provides dynamic sub-band direction indications to user equipment, and the system adjusts transmissions based on this feedback. This feedback loop enables reliable collision resolution by ensuring that both transmitter and receiver are aware of the current sub-band directions, while the standardized feedback procedures keep processing complexity manageable.
Data Source
AI summary
The apparatus may be a wireless device configured to receive, for a first symbol, an indication of a plurality of scheduled transmissions comprising a first downlink transmission in a downlink direction and a second uplink transmission in an uplink direction, wherein the plurality of scheduled transmissions comprises at least one transmission associated with a first serving cell operating in a sub-band full duplex (SBFD) mode of operation and an additional transmission associated with an additional serving cell in a plurality of serving cells, determine, based on one or more prioritization rules, a prioritized transmission direction for the first symbol, and refrain, based on the determined prioritized transmission direction, from one of transmitting an uplink transmission or receiving a downlink transmission associated with the plurality of serving cells.