Sidelink Resource Preemption in Unlicensed Bands Using COT
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink resource preemption in unlicensed bands, leading to interference and inefficient use of available spectrum.
Innovation Solution
User equipment (UE) transmits and receives sidelink control information (SCI) to reserve and determine preemption status based on channel occupancy time (COT) for sidelink resource allocation, enabling dynamic management of sidelink resources in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic preemption management is implemented based on COT, then spectrum utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by having UEs prepare and store COT information in advance before preemption events occur. The first UE stores COT information from the second UE ahead of time, enabling quick preemption decisions without complex real-time calculations, thus improving spectrum utilization while managing system complexity through pre-computed data structures.
Solution Approach 2:
The patent implements feedback mechanisms where UEs exchange COT information and preemption status through control signals. The second UE receives preemption indication from the first UE and adjusts its transmission accordingly, creating a closed-loop system that optimizes spectrum usage dynamically while using standardized feedback protocols to manage complexity.
2Object-affected harmful factors
If preemption status determination is performed based on COT, then interference reduction is improved, but processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-storing COT information and pre-computing preemption status determinations. The first UE stores COT information from the second UE in advance, so when preemption is needed, the UE can quickly determine the preemption status based on pre-prepared data rather than performing complex real-time calculations, thus reducing interference while minimizing processing time.
Solution Approach 2:
The patent replaces complex real-time mechanical calculation systems with simpler information exchange mechanisms. Instead of performing complex real-time preemption calculations, UEs exchange pre-computed COT information and preemption status through control signals, substituting computational complexity with standardized information exchange protocols that reduce both interference and processing time.
3Productivity
If COT-based preemption is implemented, then sidelink resource allocation efficiency is improved, but channel access reliability may deteriorate
Solution Approach 1:
The patent implements feedback mechanisms where UEs exchange COT information and preemption status through control signals. The second UE receives preemption indication from the first UE and adjusts its transmission accordingly, creating a closed-loop system that optimizes spectrum usage dynamically while using standardized feedback protocols to maintain channel access reliability.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting transmission parameters based on COT and preemption status. The system changes operational parameters (such as transmission timing and resource allocation) based on real-time COT information exchange, allowing efficient resource utilization while maintaining reliability through adaptive parameter modification rather than fixed rigid scheduling.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit first sidelink control information (SCI) indicative of a first reservation of a sidelink resource corresponding to an unlicensed sidelink band. The UE may receive second SCI indicative of a second reservation of the sidelink resource. The UE may determine, based on at least one channel occupancy time (COT) associated with at least one of the first UE, the second UE, or an additional UE, a preemption status corresponding to the second reservation relative to the first reservation. The UE may perform a sidelink resource allocation operation based on the preemption status. Numerous other aspects are described.