Sidelink UE Channel Sensing for Flexible Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems lack flexibility and efficiency in communication structures, particularly in the context of LTE and the evolving NR standards, which are expected to support diverse scenarios such as eMBB, mMTC, and URLLC.
Innovation Solution
The implementation of a user equipment (UE) and method that utilizes an SCI format 2-C for SL transmission, enabling a Type 2 channel access procedure for sensing channels based on preferred resource sets, and performing SL transmissions only when the channel is idle, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a communication structure is used to enable wireless communication between devices, then communication capability is provided, but flexibility and efficiency are limited
Solution Approach 1:
The patent implements dynamic resource allocation where the network device dynamically indicates time domain resources for sidelink transmissions to the UE. This allows the communication structure to adapt flexibly to different transmission scenarios (eMBB, mMTC, URLLC) without requiring complex static configurations, resolving the contradiction between flexibility and structure complexity.
Solution Approach 2:
The patent changes the parameter of resource indication by using SCI format 2-C to dynamically indicate time domain resources. This parameter change enables the system to achieve higher flexibility in resource allocation while maintaining a relatively simple communication structure, as the flexibility is achieved through parameter dynamicity rather than structural complexity.
2Object-affected harmful factors
If channel sensing is performed before SL transmission, then interference is reduced, but communication efficiency may be affected by channel availability
Solution Approach 1:
The patent implements preliminary channel sensing action before SL transmission. The UE performs channel sensing in the indicated time domain resources before transmitting, which reduces interference to other transmissions. The preliminary action of sensing ensures that transmissions only occur when the channel is clear, thereby resolving the contradiction between reducing interference and maintaining communication efficiency.
Data Source
AI summary
A user equipment (UE) is described. The UE may comprise a receiver and a transmitter; wherein the transmitter is configured to perform a Type 2 channel access procedure for sensing a channel in the one or more time resources indicated by the Resource combinations field included in the SCI format 2-C.