UE Relay QoS Splitting for Accurate Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in performing relay communication efficiently and accurately, particularly in scenarios requiring enhanced mobile broadband, massive Machine Type Communication, and Ultra-Reliable and Low Latency Communication.
Innovation Solution
A method and apparatus for UE-to-UE relay communication involve establishing connections between first and second UEs via a relay UE, splitting quality of service (QoS) for end-to-end connections, and reporting split QoS information to a base station, with the relay UE optionally reporting only the second split QoS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay communication is established between UEs, then communication coverage and connectivity are improved, but system complexity and resource management burden increase
Solution Approach 1:
A relay UE is introduced as an intermediary device to establish indirect communication paths between remote UEs and the network. The relay UE acts as a mediator that forwards data and control signals, enabling communication in scenarios where direct links are unavailable, thus improving communication reliability without requiring complex changes to the overall system architecture
Solution Approach 2:
The end-to-end QoS parameters are segmented into multiple hop-specific QoS parameters. Each relay UE and remote UE configuration is divided into separate manageable entities with distinct QoS requirements. This segmentation allows the network to manage complex relay scenarios by treating each hop as an independent resource allocation unit, reducing the overall system management burden
2Measurement precision
If QoS is split for relay communication, then resource allocation accuracy is improved, but signaling overhead and reporting complexity increase
Solution Approach 1:
The single end-to-end QoS parameter is segmented into multiple hop-specific QoS parameters (first hop QoS and second hop QoS). Each segment corresponds to a specific relay link, allowing precise resource allocation for each hop while maintaining overall QoS requirements. This segmentation enables the network to allocate resources more accurately without losing critical QoS information
Solution Approach 2:
The relay UE is configured to report only the second hop QoS information to the network, rather than reporting all QoS parameters. This partial reporting approach reduces signaling overhead while still providing the network with sufficient information to perform accurate resource allocation, as the network can infer or calculate the first hop QoS from other available data
3Productivity
If relay UE establishes connections with multiple UEs, then network capacity and connectivity are improved, but processing burden and latency increase
Solution Approach 1:
The relay UE and remote UE configurations, including QoS parameters, are pre-configured before actual data transmission begins. This preliminary configuration allows the relay UE to be ready to forward traffic immediately when needed, reducing the processing latency that would otherwise occur during dynamic setup. The network can quickly activate pre-configured relay paths without extensive real-time negotiation
Solution Approach 2:
The relay UE autonomously manages its configuration and QoS parameters based on pre-configured rules and received instructions, without requiring continuous network intervention for each data transmission. This self-service capability reduces the processing burden on the network and minimizes latency by enabling the relay UE to independently handle configuration updates and resource management decisions
Data Source
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AI summary
According to various embodiments, disclosed are a method by which a relay user equipment (UE) establishes relay communication in a wireless communication system and a device therefor. Disclosed are a method and device, the method comprising the steps of: establishing a first connection with a first UE and a second connection with a second UE for an end to end (e2e) connection between the first UE and the second UE through the relay UE; splitting a quality of service (QoS) related to the e2e connection; and reporting split QoS information about the split QoS to a base station.