Adaptive Sidelink Resource Selection for URLLC
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink resources, particularly in balancing delay and contention when transmitting ultra-reliable low-latency communications (URLLC) due to the need for either sensed or random selection schemes, which can introduce latency or lead to resource contention.
Innovation Solution
A method and apparatus for user equipment (UE) to adaptively choose between sensed and random selection schemes for sidelink resource allocation based on feedback and network parameters, optimizing resource utilization to minimize delays and avoid contentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensed selection scheme is used for sidelink resource allocation, then resource contention is reduced, but transmission delay increases
Solution Approach 1:
The patent implements dynamic resource allocation by allowing UEs to switch between sensed and random selection schemes based on real-time channel conditions and traffic requirements. The system dynamically adjusts the resource allocation mechanism rather than using a fixed approach, enabling adaptation to changing network conditions to balance contention avoidance and delay reduction.
Solution Approach 2:
The patent changes the selection scheme parameter based on URLLC traffic characteristics and channel conditions. When URLLC traffic is detected, the system adjusts parameters to favor random selection for low latency, while under normal conditions it uses sensed selection for contention avoidance. This parameter adaptation resolves the contradiction between reliability and time loss.
2Loss of time
If a random selection scheme is used for sidelink resource allocation, then transmission delay is reduced, but resource contention increases
Solution Approach 1:
The system dynamically selects between random and sensed schemes based on real-time conditions. When URLLC traffic arrives, the system switches to random selection to minimize delay, accepting higher contention risk. Under normal conditions, it transitions to sensed selection to reduce contention. This dynamic switching resolves the contradiction between speed and reliability.
Solution Approach 2:
The patent modifies the resource allocation parameter (selection scheme type) based on traffic type and channel state. For URLLC traffic, the parameter is set to random selection to achieve low latency. For other traffic, it is set to sensed selection to avoid contention. This parameter change strategy balances delay and contention trade-offs.
3Productivity
If adaptive resource selection is implemented, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct modes (sensed selection mode and random selection mode) with clear transition conditions. Each mode has its own simplified procedure, and the system switches between them based on traffic type. This segmentation reduces overall complexity compared to a single complex adaptive algorithm while maintaining efficiency benefits.
Solution Approach 2:
The system uses feedback mechanisms to determine when to switch between selection schemes. Based on channel conditions, traffic type (particularly URLLC detection), and resource availability, the system receives feedback that triggers appropriate scheme selection. This feedback-driven approach simplifies the decision-making process compared to continuous optimization algorithms while achieving high resource utilization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may adaptively choose a resource selection scheme between a sensed selection scheme and a random selection scheme to determine a sidelink resource. The UE may transmit a sidelink communication utilizing the sidelink resource based at least in part on adaptively choosing the resource selection scheme. Numerous other aspects are provided.