Non-Terrestrial Network Scheduling With Collision Avoidance Rules
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Solution Overview
Problem
In non-terrestrial networks (NTNs), there is a challenge in avoiding collisions between uplink and downlink communications due to the larger round-trip times and lack of synchronization, leading to potential communication interruptions.
Innovation Solution
The implementation of collision avoidance and handling rules, including timing configurations and offset parameters, to manage the overlap between downlink and uplink resources, ensuring synchronized communication in half-duplex operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If timing configurations and offset parameters are implemented to manage overlap between downlink and uplink resources, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring timing configurations and offset parameters before communication occurs. The network node provides ahead-of-time information about timing relationships between downlink and uplink resources, allowing the UE to proactively avoid collisions without real-time complex processing. This resolves the contradiction by establishing reliable timing relationships in advance, reducing the need for complex runtime collision avoidance mechanisms.
2Reliability
If collision avoidance rules are implemented in NTNs, then communication interruptions are reduced, but signaling overhead increases
Solution Approach 1:
The patent applies parameter changes by introducing specific timing configuration parameters and offset values that define the temporal relationships between downlink and uplink resources. Instead of complex collision avoidance algorithms, the system uses simplified parameter-based timing relationships (such as offset parameters between downlink assignment and uplink transmission) to prevent collisions. This reduces signaling overhead while maintaining communication continuity by changing from rule-based collision avoidance to parameter-based timing coordination.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, for half-duplex operation in a non-terrestrial network, signaling identifying a timing configuration, wherein the timing configuration is related to a collision avoidance rule or a collision handling rule, wherein the collision avoidance rule or the collision handling rule is related to an overlapping between a downlink resource and an uplink resource associated with an offset parameter. The UE may communicate, in the non-terrestrial network, with a network node using at least one of the uplink resource or the downlink resource in accordance with the collision avoidance rule or the collision handling rule. Numerous other aspects are described.