SBFD Collision Resolution for Semi-Static and Dynamic Scheduling
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Solution Overview
Problem
Current wireless communication standards lack effective protocols for handling collisions between semi-static and dynamic scheduling in subband full duplex (SBFD) operations, particularly when downlink and uplink messages are concurrently scheduled without link direction indication, leading to undefined collision handling for repeated transmissions across SBFD slots.
Innovation Solution
A collision resolution protocol is introduced for SBFD symbols, where downlink messages with repetition are prioritized over semi-statically configured uplink messages, with specific rules for determining message cancellation or transmission based on priority and timing, and handling overlapping messages such as random access messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semi-static and dynamic scheduling are used concurrently in SBFD operations, then scheduling flexibility and resource utilization are improved, but collision handling becomes undefined and communication reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing collision resolution rules in advance through higher layer signaling before actual collisions occur. The network entity pre-configures priority levels and resolution mechanisms for potential conflicts between semi-static and dynamic scheduling, enabling reliable operation without real-time collision detection algorithms.
Solution Approach 2:
The patent introduces an intermediary conflict resolution mechanism that mediates between semi-static and dynamic scheduling requests. When conflicts are detected, the predefined resolution rules act as an intermediary to determine which transmission proceeds, eliminating the need for complex real-time negotiation and ensuring reliable communication.
2Reliability
If downlink messages with repetition are prioritized over uplink messages, then downlink communication reliability is improved, but uplink transmission efficiency deteriorates
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different message types in different contexts. Downlink messages with repetition are given higher priority to ensure reliability, while uplink messages maintain their own priority level. The resolution mechanism locally adapts the quality of service based on the specific message characteristics and collision scenario.
Solution Approach 2:
The patent uses parameter changes by dynamically adjusting the effective priority based on message characteristics. When a downlink message with repetition is identified, its priority parameter is increased; when an uplink message is involved in a collision, its effective priority is reduced. This parameter-based approach resolves conflicts while maintaining overall system efficiency.
3Reliability
If collision resolution rules are defined for SBFD operations, then communication reliability is improved, but protocol complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the collision resolution process into distinct, manageable components: (1) detection phase identifying collision conditions, (2) resolution phase applying predefined rules, and (3) execution phase carrying out the selected action. This segmentation simplifies the overall protocol by breaking down the complex collision handling into modular steps.
Solution Approach 2:
The patent implements self-service by enabling the UE to autonomously detect and resolve collisions using predefined rules without requiring continuous network intervention. The UE independently evaluates scheduling conflicts and applies the resolution mechanism, reducing the complexity of network-side control while maintaining reliable communication.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, at a first time, control information that schedules the UE to receive a downlink message or an uplink message that is associated with repetition across one or more full duplex slots. The UE may receive signaling that schedules the UE to transmit one or more uplink messages or one or more downlink messages across the one or more full duplex slots. The UE may determine which of the scheduled messages to communicate, during each full duplex slot based on a respective priority associated with each message and based on whether at least one of the messages overlaps with a transmission timeline relative to the first time.