Wireless Slot Format Optimization via Dynamic DCI
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving wireless signals due to limitations in managing slot formats and channel occupancy durations, particularly in multiple access systems like CDMA, FDMA, TDMA, and OFDMA, which affect communication capacity and reliability.
Innovation Solution
A method and apparatus for a wireless communication system that involves receiving Downlink Control Information (DCI) including slot format and channel occupancy duration information, determining slot formats based on this information, and performing communication accordingly. This allows for efficient communication by optimizing slot formats and channel usage across multiple slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional slot format management methods are used in multiple access systems, then system compatibility is maintained, but communication capacity and spectral efficiency are limited
Solution Approach 1:
The patent implements dynamic slot format indication through DCI messages, allowing the network to flexibly adjust slot formats (downlink-uplink-flexible symbol configurations) based on real-time traffic conditions. This dynamic adaptation enables the system to optimize communication capacity by switching between different slot formats without requiring complex manual configuration, resolving the contradiction between productivity improvement and device complexity.
Solution Approach 2:
The patent changes the parameter of slot format configuration from static to dynamic by introducing DCI-based indication mechanisms. The network can indicate different slot formats (e.g., all downlink, all uplink, or mixed configurations) through DCI messages, allowing the system to adapt parameters in real-time to maximize spectral efficiency and communication capacity while maintaining manageable system complexity through standardized procedures.
2Productivity
If channel occupancy duration is extended to improve communication efficiency, then spectral efficiency increases, but interference management becomes more difficult
Solution Approach 1:
The patent applies preliminary action by requiring Listen-Before-Talk (LBT) procedures before channel occupancy begins. The network performs clear channel assessment and LBT checks to ensure the channel is idle before initiating extended transmissions. This preliminary verification prevents interference with other systems while allowing extended channel occupancy durations to improve spectral efficiency, thus resolving the contradiction between productivity and harmful factors.
Solution Approach 2:
The patent implements feedback mechanisms through uplink control information that allows terminals to report channel conditions and interference levels to the network. This feedback enables the network to adjust channel occupancy durations and slot formats dynamically, extending occupancy when conditions permit (improving spectral efficiency) while reducing it when interference risks are detected (managing harmful factors).
3Reliability
If slot format flexibility is increased to adapt to varying traffic conditions, then communication reliability improves, but system complexity increases
Solution Approach 1:
The patent segments the slot structure into downlink symbols, uplink symbols, and flexible symbols, allowing independent configuration of each segment based on traffic needs. This segmentation enables the system to improve communication reliability by allocating resources appropriately for different traffic types (e.g., more downlink symbols for data reception, more uplink symbols for acknowledgments) while maintaining manageable complexity through standardized segment definitions and configuration procedures.
Solution Approach 2:
The patent creates universal slot format indications that can be applied across different terminal types and traffic conditions through standardized DCI formats. The same slot format indication mechanism serves multiple functions: indicating slot structure, coordinating uplink-downlink switching, and managing resource allocation. This multi-functionality improves communication reliability through consistent behavior while avoiding the complexity of separate control mechanisms for each function.
Data Source
AI summary
The present invention relates to a wireless communication system, and specifically to a method and a device therefor, the method comprising: a step for receiving group common DCI including slot format information and channel occupancy duration information; a step for determining slot formats for one or more slots on the basis of the slot format information and the channel occupancy duration information; and a step for performing communication on the basis of the determined slot formats for the one or more slots.