Dynamic Slot Format Adjustment for Wireless Resource Efficiency
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Solution Overview
Problem
Wireless communication systems face inefficiencies in resource allocation due to semi-static slot formats, which do not adapt well to varying traffic patterns and channel quality changes, leading to sub-optimal use of resources in half-duplex communications.
Innovation Solution
User equipment (UE) can transmit control messages to request slot format changes based on current data traffic and channel quality, allowing the base station to dynamically adjust the slot format for more efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-static slot formats are used for resource allocation, then device complexity is reduced and system stability is improved, but resource utilization efficiency deteriorates and adaptability to varying traffic patterns worsens
Solution Approach 1:
The patent implements dynamic slot format adjustment by allowing the UE to transmit control messages requesting slot format changes based on current data traffic and channel quality conditions. The base station processes these requests and dynamically reconfigures the slot format, transforming the static resource allocation into an adaptive system that responds to real-time communication demands, thereby resolving the contradiction between system stability and resource utilization efficiency.
Solution Approach 2:
The patent changes the slot format parameters (such as the number of uplink/downlink symbols, slot structure) dynamically based on traffic patterns and channel quality. By allowing parameter adjustments through UE-initiated control messages and base station reconfiguration, the system optimizes resource allocation without requiring complete system redesign, balancing complexity and efficiency.
2Adaptability or versatility
If semi-static slot formats are configured, then system stability and ease of operation are improved, but adaptability to channel quality changes and traffic patterns deteriorates
Solution Approach 1:
The patent enables the UE to autonomously assess its own communication conditions (data traffic volume, channel quality) and self-initiate slot format change requests through control messages. This self-service mechanism allows the system to adapt to varying traffic patterns without requiring complex external control or manual reconfiguration, improving adaptability while maintaining operational simplicity.
Solution Approach 2:
The patent establishes a feedback loop where the UE monitors communication conditions, transmits control messages indicating desired slot format changes, and the base station responds with reconfiguration decisions. This feedback mechanism enables the system to adapt to channel quality changes and traffic patterns dynamically while maintaining ease of operation through automated decision-making processes.
3Productivity
If slot format changes are requested frequently to match varying traffic patterns, then resource utilization efficiency is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent employs control messages that serve multiple functions: they convey slot format change requests while also indicating the underlying reasons (traffic pattern changes, channel quality degradation). This multi-functionality reduces signaling overhead by combining multiple pieces of information into single messages, allowing frequent adaptations without proportionally increasing overhead.
Solution Approach 2:
The patent implements a threshold-based mechanism where the UE only initiates slot format change requests when communication conditions deteriorate below certain thresholds or improve significantly. This partial action approach avoids unnecessary signaling for minor fluctuations, reducing overhead while maintaining high system throughput through timely responses to significant condition changes.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may determine to change a first slot format used when operating in a half-duplex mode based on a traffic pattern or a channel quality, or both, and may transmit a request to change the slot format to a base station. The request may include information relating to a slot format based on the traffic pattern or the channel quality, or both, such as an explicit indication of a slot format or a request for a different resource distribution between uplink symbols, downlink symbols, or flexible symbols, or any combination thereof. The base station may receive the request to change the slot format and may transmit an indication of a second slot format to the UE based on the request. The base station and the UE may communicate using the second slot format.