Dynamic SBFD Subband Configuration for Flexible Uplink and Downlink
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Solution Overview
Problem
The flexibility of the subband full duplex (SBFD) system is poor due to semi-static configuration of time frequency resources, leading to waste of uplink or downlink resources depending on the imbalance of uplink and downlink services, resulting in inefficient resource utilization.
Innovation Solution
A method for a terminal device to dynamically adapt the transmission direction of flexible frequency units within a configured frequency domain resource based on signaling from a network device, allowing both uplink and downlink transmissions, and optionally switching between SBFD and TDD modes to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static configuration of SBFD subbands is used, then system complexity is reduced and configuration is simplified, but flexibility of the SBFD system deteriorates and resource utilization efficiency decreases
Solution Approach 1:
The patent applies dynamics by enabling the transmission direction of flexible frequency units to be dynamically adjusted through time-unit-specific signaling. The network device can configure different time unit sets with different subband patterns, allowing the system to adapt transmission directions dynamically based on service demands while maintaining simplified semi-static configuration for stable scenarios.
Solution Approach 2:
The patent segments the time domain into different time unit sets, where each set can have independent subband pattern configurations. This segmentation allows different portions of time resources to be optimized independently for uplink or downlink services, resolving the contradiction between simplified overall configuration and localized flexibility needs.
2Stability of the object's composition
If semi-static configuration of SBFD subbands is used, then configuration stability is improved, but resource utilization efficiency deteriorates due to resource waste
Solution Approach 1:
The patent introduces dynamic adjustment mechanisms that allow the system to maintain stable semi-static configurations as defaults while enabling dynamic optimization of transmission directions when service demands change. This ensures configuration stability for normal operations while improving resource utilization efficiency during traffic variations.
Solution Approach 2:
The patent changes the parameter of transmission direction for flexible frequency units based on service conditions. By adjusting which frequency units are designated for uplink or downlink in different time unit sets, the system maintains stable overall configuration while optimizing resource allocation to match actual traffic patterns, thereby improving utilization efficiency.
3Device complexity
If fixed time frequency resource allocation is used, then system complexity is reduced, but adaptability to varying service demands deteriorates
Solution Approach 1:
The patent segments time frequency resources into multiple time unit sets with different subband patterns. Each segment can be independently configured to match specific service demands, allowing the system to maintain low overall complexity while achieving high adaptability through localized optimizations in different time segments.
Solution Approach 2:
The patent introduces dynamic configurability where the network device can assign different time unit sets to different subband patterns based on varying service demands. This allows the system to maintain simple fixed allocation as a baseline while adding dynamic adaptability only where needed, balancing complexity and versatility.
Data Source
AI summary
The present disclosure relates to subband configuration methods and communication apparatuses. In one example method, a terminal device receives first signaling and second signaling from a network device, where the first signaling indicates a first time unit set, the second signaling indicates a first subband pattern, the first subband pattern indicates a transmission direction of a frequency unit comprised in a first frequency domain resource, and the first frequency domain resource is a frequency unit set configured by the network device for the terminal device. The terminal device determines a transmission direction of a first time frequency resource based on the first subband pattern, where the first time frequency resource comprises a first frequency unit in the first frequency domain resource and a first time unit, and the first time unit is any time unit in the first time unit set.