Resource Selection in 5G NR V2X Semi-Persistent Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G NR V2X communication systems face inefficiencies in resource selection for semi-persistent scheduling, particularly due to restrictions in overlapping resource reservations between UEs, leading to limited available resources for reservation.
Innovation Solution
A method where a first UE receives reserved resources from one or more second UEs via a control channel, determines transmission resources to reserve by avoiding overlaps, and transmits data using these reserved resources, allowing for dynamic selection and adjustment of resources to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs reserve resources in 5G NR V2X systems using traditional methods, then resource allocation is simple, but resource utilization is limited due to overlapping reservations
Solution Approach 1:
The patent applies preliminary action by performing resource reservation before actual data transmission. UEs reserve resources in advance based on predicted traffic patterns and channel conditions, allowing the system to prepare transmission opportunities before they are needed. This proactive resource allocation improves utilization by ensuring resources are ready and available, reducing waiting time and conflicts during actual transmission.
Solution Approach 2:
The patent implements dynamics by making resource reservation adjustable and adaptive rather than fixed. The reservation parameters such as periodicity, resource pool selection, and time-frequency allocation can be dynamically modified based on changing channel conditions, traffic demands, and interference levels. This dynamic approach allows the system to optimize resource utilization in real-time while adapting to varying V2X communication requirements.
2Reliability
If UEs avoid overlapping reserved resources, then collision is reduced, but the number of available resources for reservation decreases
Solution Approach 1:
The patent applies feedback by continuously monitoring resource reservation status, transmission outcomes, and channel conditions. UEs receive feedback information about successful transmissions, collisions, and resource availability from both the network and other UEs. Based on this feedback, the system adjusts future resource selections to avoid known conflict areas while exploiting available resources, thereby maintaining reliability without unnecessarily reducing the resource pool.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting reservation parameters such as periodicity, resource pool index, time offset, and frequency allocation. When resources become scarce or conflicts are detected, the system changes these parameters to select alternative resources. This flexible parameter adjustment allows the system to maintain transmission reliability by avoiding collisions while still utilizing a larger portion of the available resource space through adaptive reconfiguration.
3Productivity
If semi-persistent scheduling is used for V2X communication, then transmission efficiency is improved, but resource flexibility is reduced due to fixed reservations
Solution Approach 1:
The patent resolves this contradiction by introducing dynamics into semi-persistent scheduling. While maintaining the periodic reservation structure that provides efficiency, the system allows dynamic adjustment of reservation parameters based on actual traffic needs and channel conditions. The periodicity, resource pool selection, and time-frequency allocation can be modified between persistent cycles, enabling the system to adapt to changing requirements while retaining the scheduling efficiency benefits of semi-persistent operation.
Solution Approach 2:
The patent applies parameter changes by allowing modification of SPS parameters such as periodicity, resource offset, and resource pool configuration. Rather than fixing these parameters permanently, the system can update them based on feedback from transmission performance, channel quality, and traffic patterns. This enables the maintenance of efficient periodic scheduling while introducing the flexibility to adapt parameters when conditions change, thus resolving the trade-off between efficiency and flexibility.
Data Source
AI summary
In an aspect, the present disclosure includes a method, apparatus, and computer readable medium for wireless communications for receiving, by a first user equipment (UE) from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UE; determining, by the first UE, one or more transmission resources to reserve based on the one or more reserved resources in time; and transmitting, by the first UE to the one or more second UEs, data using the one or more reserved transmission resources.