Relay Device QoS Status Reporting for Sidelink Management
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Solution Overview
Problem
Current wireless communication systems face challenges in managing Quality-of-Service (QoS) for sidelink connections in relay scenarios, particularly in single-hop and multi-hop relaying, where existing solutions lack UE-level granularity and require direct communication with the core network, leading to inefficiencies in QoS maintenance and negotiation.
Innovation Solution
Implementing QoS management mechanisms that allow for QoS status reporting from relay devices to the radio access network, using QoS assistance information to determine tolerances for QoS parameters, and employing reflective QoS and early Buffer Status Report (BSR) techniques to maintain and adjust QoS across sidelinks, thereby avoiding the need for direct core network communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If QoS management uses existing solutions without UE-level granularity, then device complexity is reduced, but QoS management precision deteriorates
Solution Approach 1:
The patent segments QoS management into UE-level granularity by introducing separate QoS parameters (first QoS parameter for uplink, second QoS parameter for downlink) that can be independently managed and reported. This allows precise control of QoS for each UE through the relay device without requiring complex core network involvement for every QoS adjustment.
Solution Approach 2:
The relay device acts as an intermediary that collects QoS status information from multiple UEs and reports aggregated QoS status information to the network device. This intermediary function enables UE-level QoS management precision while reducing overall system complexity by consolidating reporting at the relay level.
2Reliability
If QoS management requires direct communication with core network, then QoS management reliability is improved, but communication time increases
Solution Approach 1:
The relay device performs preliminary QoS status collection and aggregation before reporting to the network device. By pre-processing QoS information at the relay level and only reporting when QoS thresholds are violated, the system maintains reliable QoS management while reducing unnecessary communication time with the core network.
Solution Approach 2:
The patent implements a feedback mechanism where the network device sends QoS threshold information to the relay device, which then monitors and reports only when thresholds are violated. This feedback-based approach ensures reliable QoS management while minimizing communication overhead and time loss.
3Measurement precision
If QoS status reporting is implemented at UE-level granularity, then QoS management precision is improved, but device complexity worsens
Solution Approach 1:
The relay device merges QoS status information from multiple UEs into aggregated QoS status information for reporting. This combining approach maintains UE-level management precision while reducing the relay device's complexity by consolidating reporting tasks rather than managing each UE independently.
Solution Approach 2:
The relay device performs multiple functions including QoS status collection, aggregation, threshold monitoring, and selective reporting. This multi-functionality allows the relay to handle UE-level QoS management comprehensively while presenting a unified interface to the network device, effectively managing complexity.
4Speed
If reflective QoS and early BSR techniques are employed, then data transmission speed is improved, but processing complexity increases
Solution Approach 1:
The system employs early Buffer Status Report (BSR) techniques where the relay device predicts buffer status and triggers BSR reporting before actual data transmission needs arise. This preliminary action accelerates data transmission by preparing resource allocations in advance while managing processing complexity through predictive algorithms.
Solution Approach 2:
Reflective QoS techniques use feedback from downlink QoS parameters to adjust uplink resource allocations. The relay device monitors downlink QoS status and reflects appropriate uplink QoS settings, creating a feedback loop that improves transmission speed while keeping processing complexity manageable through standardized reflection rules.
Data Source
AI summary
A user device, UE, for a wireless communication network, acts as a relaying entity so as to provide functionality to support connectivity between one or more remote UEs and a destination of the wireless communication network, wherein a connection between the remote UE and the destination comprises one or more sidelinks, each sidelink associated with a predefined or negotiated Quality-of-Service, QoS. The UE is connected via a sidelink to one or more of the following: one or more of the remote UEs, the destination, one or more further relay UEs. The UE determines a status of the sidelink with regard to the predefined or negotiated QoS, and sends the status of the sidelink towards a network entity, like a base station, of the wireless communication network.