Slot Format Conflict Resolution in Wireless Systems
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Solution Overview
Problem
Wireless communication systems face inefficiencies due to slot format conflicts, where base stations transmit conflicting slot formats to user equipment (UE), leading to inefficient resource allocation and difficulty in determining suitable slot formats for communication.
Innovation Solution
The described techniques involve a UE receiving both a semi-static and a dynamic slot format configuration from a base station, allowing it to determine a suitable slot format by replacing or combining symbols from these configurations, and communicating accordingly, with the option to convert anchor slots to non-anchor slots based on dynamic configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a base station transmits multiple slot format configurations to a UE, then the system can support both semi-static and dynamic slot formats, but the UE encounters conflicting slot formats that make it difficult to determine a suitable slot format for communication
Solution Approach 1:
The patent segments the slot format configuration into two distinct types: semi-static slot formats (configured via RRC signaling) and dynamic slot formats (indicated via DCI signaling). This segmentation allows the UE to process different configuration types separately, with clear rules for when each applies, thereby resolving the conflict between having versatile slot format support and maintaining ease of operation.
Solution Approach 2:
The base station performs preliminary action by pre-configuring semi-static slot formats through RRC signaling before actual data transmission. This preliminary configuration establishes a baseline slot format that the UE can rely on, and subsequent dynamic indications can then modify specific aspects without creating complete conflicts, as the semi-static configuration serves as a predefined framework.
2Adaptability or versatility
If the base station transmits conflicting slot format configurations, then more slot format options are available, but the UE may inefficiently allocate resources or be unable to determine a suitable slot format
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors both semi-static RRC configurations and dynamic DCI indications, and applies resolution rules to determine the effective slot format. The system provides feedback through the interaction between base station transmissions and UE processing, ensuring that resource allocation remains efficient by following defined precedence rules rather than allowing arbitrary conflicts.
Solution Approach 2:
The patent changes the parameters of slot format configuration by introducing different signaling methods with different priorities. Semi-static configurations provide stable baseline parameters, while dynamic indications allow parameter changes for specific transmissions. This parameter differentiation enables versatile slot format options while maintaining productivity through clear resolution rules based on signaling type and timing.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A base station may transmit or otherwise indicate a semi-static slot format configuration and a dynamic slot format configuration to a user equipment (UE). The UE may determine a slot format configuration based on the received semi-static and dynamic slot format configurations. In some cases, the UE may replace certain resources of the semi-static slot format configuration with resources from the dynamic slot format configuration depending on a certain embodiment. Additionally or alternatively, the base station may transmit an anchor slot configuration to the UE, which may indicate which resources of the semi-static slot format configuration can be overridden or replaced by the dynamic slot format configuration.