Relay Terminal QoS Mapping for Two-Segment 5G D2D Links
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Solution Overview
Problem
In D2D communication systems, especially in 5G, the mismatch between QoS parameters for first-segment and second-segment data transmissions between a remote terminal and a relay terminal and the network side leads to unsatisfied service transmission requirements, including transmission rate and delay inconsistencies.
Innovation Solution
The relay terminal determines and sends first QoS information based on associated second QoS information, ensuring a consistent rate and delay for end-to-end QoS management by receiving QoS information from SMF or PCF network elements and storing it for dynamic QoS adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If QoS management is performed separately on first-segment data transmission (remote terminal to relay terminal) and second-segment data transmission (relay terminal to network side device) based on QoS flow granularity, then QoS management can be implemented on both segments, but QoS parameters such as transmission rate may mismatch between the two segments, causing service transmission requirements to be unsatisfied
Solution Approach 1:
The patent merges the separate QoS management of first-segment and second-segment data transmissions by establishing a mapping relationship between QoS parameters of both segments. The network side device configures QoS parameters for both segments simultaneously, ensuring they work together as a unified system rather than independent entities, thereby preventing parameter mismatch while maintaining QoS management capability.
Solution Approach 2:
The patent changes the approach from independent parameter configuration to coordinated parameter management. By establishing mapping relationships between QoS parameters (such as mapping QoS flow identifiers and rate parameters) of the two segments, the system ensures that parameter changes in one segment are reflected in the other, maintaining consistency and satisfying service transmission requirements.
2Productivity
If transmission is performed according to existing mechanisms with separate QoS configuration, then transmission can occur on both segments, but two delays (delay from remote terminal to relay terminal and delay from relay terminal to network side) may be greater than service delay requirement of the remote terminal
Solution Approach 1:
The patent applies preliminary action by pre-configuring QoS parameters including delay budgets for both transmission segments before actual data transmission occurs. The network side device establishes the mapping relationship and sets appropriate delay parameters in advance, allowing the system to meet service delay requirements without adding complexity during runtime transmission.
3Productivity
If rate parameters of first QoS information and second QoS information are different, then transmission can occur on both segments, but data packet loss occurs on the relay terminal
Solution Approach 1:
The patent changes the rate parameters configuration by establishing a mapping relationship that ensures rate parameter consistency between first and second QoS information. The network side device configures the rate parameters for both segments to be compatible, preventing packet loss at the relay terminal while maintaining transmission capability across both segments.
Data Source
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AI summary
Embodiments of this application disclose a method for managing QoS, a relay terminal, a PCF network element, an SMF network element, and a remote terminal. The method includes: A relay terminal obtains QoS information from a network device, where the QoS information includes first QoS information and/or second QoS information, the first QoS information is used to transmit data of a remote terminal between the remote terminal and the relay terminal, and the second QoS information is used to transmit the data of the remote terminal between the relay terminal and a user plane function UPF network element; and the relay terminal sends the first QoS information to the remote terminal based on the QoS information. According to embodiments of this application, QoS from the remote terminal to a network side can be properly managed, and a requirement on service transmission from the remote terminal to the network side is ensured.