Dynamic Sidelink Mode Switching for Efficient COT Utilization
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Solution Overview
Problem
The existing mobile communication systems face challenges in efficiently managing channel occupancy time (COT) periods for sidelink (SL) communication, leading to inefficiencies in resource utilization and increased latency.
Innovation Solution
A method and device for switching SL modes within a COT period, involving resource allocation and reservation by user equipment (UE) and feedback mechanisms with a base station, allowing for efficient utilization of remaining COT sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single SL mode is used throughout the COT period, then the system operation is simple, but the resource utilization efficiency is reduced due to inability to adapt to different transmission needs
Solution Approach 1:
The patent implements dynamic SL mode switching within the COT period, allowing the system to transition between different SL modes (e.g., mode 1, mode 2, mode 3) based on real-time transmission needs and channel conditions. This dynamic adaptation resolves the contradiction by enabling versatility while managing complexity through structured mode transition protocols and base station coordination.
Solution Approach 2:
The patent changes the operational parameters of SL communication by switching between different SL modes with distinct characteristics (resource allocation methods, transmission formats, etc.). This allows the system to adapt to varying transmission requirements within the COT period while maintaining manageable complexity through defined parameter sets for each mode.
2Productivity
If remaining COT sections are left unused after a transmission, then the system operation is simple, but the resource utilization efficiency is reduced
Solution Approach 1:
The patent performs preliminary actions by reserving additional transmission resources within the COT period before they are needed. The base station allocates multiple potential transmission opportunities in advance, and the UE can utilize these reserved resources if transmission needs arise, thereby improving COT utilization without requiring complex real-time resource management decisions.
Solution Approach 2:
The patent ensures continuous useful action by filling remaining COT sections with additional transmissions when possible. Through mode switching and resource reservation mechanisms, the system maintains continuous transmission activity throughout the COT period, eliminating idle periods and improving overall productivity while managing complexity through structured resource allocation.
3Productivity
If additional transmissions are performed within remaining COT sections, then the resource utilization is improved, but the latency may increase due to resource selection and reservation processes
Solution Approach 1:
The patent performs resource reservation in advance during the initial DCI reception phase, so that when transmission opportunities arise within the COT period, the UE can immediately utilize pre-allocated resources without experiencing latency from real-time resource selection. This preliminary action resolves the contradiction by enabling high throughput while minimizing time loss.
4Adaptability or versatility
If the UE autonomously selects and reserves transmission resources, then the resource allocation flexibility is improved, but the coordination with base station becomes more complex
Solution Approach 1:
The patent segments the resource allocation process into distinct phases: base station-controlled initial resource indication via DCI, followed by UE-autonomous resource selection and reservation within the COT period. This segmentation resolves the contradiction by providing flexibility through UE autonomy while managing coordination complexity through clear division of responsibilities between base station and UE.
Data Source
AI summary
A method and a device for performing communication in a wireless communication system are disclosed. The method performed by means of a first terminal in a wireless communication system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a base station, DCI related to resource allocation for a SL; checking a first transmission resource within a COT section on the basis of the DCI; performing a first SL-based transmission in the first transmission resource; selecting a second transmission resource within the COT section and reserving same on the basis of the COT section being valid after the first transmission resource; and performing a second SL-based transmission before ending the COT section after the first SL-based transmission. Here, the second SL-based transmission can be performed in the second transmission resource reserved by means of the terminal.