Wireless Duplex Resource Switching for Downlink Throughput
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Solution Overview
Problem
In wireless communication systems, the use of full duplex operation can lead to reduced downlink performance and throughput due to unutilized uplink resources when downlink traffic exceeds uplink traffic, especially in subband full duplex configurations.
Innovation Solution
A method for a user equipment (UE) and base station to dynamically switch between full duplex and half duplex operations based on traffic direction and network configuration, using time division duplex and full duplex configuration messages to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If subband full duplex operation is configured with semi-static time resources, then full duplex capability is enabled, but downlink performance deteriorates when downlink traffic exceeds uplink traffic due to unutilized uplink resources
Solution Approach 1:
The patent implements dynamic switching between full duplex and half duplex modes based on real-time traffic conditions. The base station determines whether to perform full duplex or half duplex operation in each FD time resource based on uplink and downlink traffic loads, allowing the system to adapt flexibly rather than being constrained by semi-static configuration. This resolves the contradiction by making the duplex mode dynamic rather than fixed.
Solution Approach 2:
The patent changes the operational parameters (duplex mode, bandwidth utilization) based on traffic conditions. When downlink traffic exceeds uplink traffic, the system transitions from full duplex to half duplex mode and adjusts bandwidth usage accordingly, allowing uplink resources to be fully utilized for downlink transmission when appropriate. This parameter adaptation resolves the throughput degradation issue.
2Adaptability or versatility
If uplink subbands are allocated in SBFD time resources, then full duplex operation is supported, but downlink transmission resources are reduced when downlink traffic is greater than uplink traffic
Solution Approach 1:
The patent dynamically adjusts the allocation of frequency resources between uplink and downlink based on real-time traffic demands. Instead of fixed subband allocation in SBFD mode, the system can flexibly reassign resources, allowing more frequency resources to be dedicated to downlink when downlink traffic exceeds uplink traffic, thereby increasing the quantity of downlink transmission resources.
Solution Approach 2:
The system changes the frequency resource allocation parameters dynamically based on traffic conditions. When downlink traffic is high, the patent adjusts the proportion of frequency resources allocated to downlink versus uplink, effectively increasing downlink transmission resources while maintaining full duplex capability when needed.
3Productivity
If half duplex operation is performed in configured FD time resources, then bandwidth utilization is improved, but resource usage clarity deteriorates without explicit operation indication
Solution Approach 1:
The patent implements feedback mechanisms where the base station notifies UEs about the actual operation mode (full duplex or half duplex) being performed in each FD time resource through operation indication information. This feedback ensures that UEs have clear knowledge of the operation mode, preventing confusion and enabling proper resource utilization while allowing flexible half duplex operation when bandwidth utilization is prioritized.
Solution Approach 2:
The patent introduces operation indication information as an intermediary communication channel between the base station and UEs. This intermediary carries explicit information about the actual operation mode, bridging the gap between the configured FD time resources and the actual half duplex or full duplex operation, thereby maintaining resource usage clarity even when dynamic switching occurs.
Data Source
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AI summary
Provided are a device operation method in a wireless communication system, and a device. The device receives a time division duplex (TDD) configuration message from a network and receives, from the network, a full duplex (FD) configuration message informing about FD time resources, and thus carries out communication with the network on the basis thereof. The FD time resources are included in symbols configured on the basis of the TDD configuration message. The device carries out a FD operation in a first FD time resource among the FD time resources, and carries out a half duplex (HD) operation in a second FD time resource among the FD time resources. The operations carried out by a terminal in the respective FD time resources are based on at least one among a first scheme which is based on a predetermined agreement, and an explicitly instructing second scheme.