UE-to-UE Relay QoS Splitting for Base-Station Resource Allocation
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Solution Overview
Problem
The challenge in wireless communication systems is effectively managing quality of service (QoS) split in UE-to-UE relays, particularly in scenarios requiring resource allocation and transmission between entities, which is crucial for ensuring reliable and efficient data transfer in diverse applications such as V2X communication.
Innovation Solution
A method involving a first UE establishing a PC5 RRC connection with a second UE through a relay UE, receiving split QoS-related information, reporting this information to a base station, and transmitting data to the second UE through allocated resources, thereby facilitating efficient QoS management in UE-to-UE relay operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If QoS split is performed in UE-to-UE relay, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The QoS parameters are segmented into multiple components (5QI, QoS Flow ID, 5G QoS Indicator) that are separately managed and reported. The relay UE splits the end-to-end QoS requirements into hop-by-hop QoS parameters, allowing independent optimization of each link while maintaining overall QoS guarantees.
Solution Approach 2:
The relay UE acts as an intermediary entity that receives QoS requirements from the remote UE, processes them through QoS split, and reports the divided QoS parameters to the base station. This intermediary function enables complex QoS management to be distributed across multiple UEs rather than centralized in one entity.
2Reliability
If split QoS information is reported to base station, then QoS requirement satisfaction is improved, but signaling overhead increases
Solution Approach 1:
Instead of reporting all possible QoS parameters, the system reports only the essential split QoS information (5QI, QoS Flow ID, 5G QoS Indicator) that is sufficient for the base station to allocate resources appropriately. This partial reporting approach provides adequate QoS guarantee while minimizing signaling overhead.
Solution Approach 2:
The QoS split and parameter preparation are performed in advance by the relay UE before actual data transmission begins. This preliminary processing ensures that when data transmission occurs, the base station already has the necessary QoS information ready, reducing real-time signaling requirements.
3Reliability
If resource allocation is performed based on split QoS, then transmission reliability is improved, but processing time increases
Solution Approach 1:
The QoS split parameters are prepared and reported to the base station before resource allocation occurs. This preliminary preparation allows the base station to pre-configure resource allocation strategies based on the split QoS information, reducing the processing time required during actual data transmission.
Data Source
AI summary
A method for operating first user equipment (UE) associated with UE-to-UE relay in a wireless communication system according to an embodiment comprises the steps in which the first UE: establishes a PC5 RRC connection with a second UE through a relay UE; receives split Quality of Service (QOS)-related information from the relay UE; reports the split QoS-related information to a base station; receives, from a base station, resource allocation information determined on the basis of the split QoS-related information; and transmits data, to be received by the second UE, to the relay UE through a resource corresponding to the resource allocation information.