QoS Flow to D2D Bearer Mapping for Consistent Wireless Service
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Solution Overview
Problem
In device-to-device (D2D) communication, quality of service (QoS) requirements for data packets are not distinguished, leading to inconsistent QoS, which reduces wireless communication quality as packets with the same requirements may receive different service.
Innovation Solution
The proposed solution involves correlating downlink QoS flows with corresponding D2D bearers and uplink QoS flows with radio bearers, ensuring that data packets are transmitted on bearers that match their required quality of service, thereby maintaining consistent QoS across D2D connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If QoS requirements are not distinguished on D2D connection, then device complexity is reduced, but wireless communication quality deteriorates due to inconsistent QoS for packets with same requirements
Solution Approach 1:
The patent segments the D2D connection into multiple logical channels or bearers, each dedicated to specific QoS requirements. This segmentation allows different QoS flows to be transmitted over appropriate channels, ensuring that packets with the same QoS requirements receive consistent treatment while maintaining manageable system complexity through structured organization.
Solution Approach 2:
The patent applies local quality by assigning specific QoS characteristics to specific transmission paths or bearers within the D2D connection. Each bearer is configured with appropriate QoS parameters tailored to the requirements of the data packets it carries, ensuring that local transmission quality matches the specific needs of each QoS flow while maintaining overall system efficiency.
2Reliability
If QoS flows are correlated with D2D bearers, then wireless communication quality is improved through consistent QoS, but device complexity increases due to mapping and management overhead
Solution Approach 1:
The patent establishes QoS flow to D2D bearer mappings in advance, before actual data transmission begins. This preliminary configuration allows the system to prepare appropriate bearers for specific QoS requirements, ensuring consistent QoS treatment from the outset while reducing real-time decision complexity during packet transmission.
Solution Approach 2:
The patent introduces an intermediary mapping mechanism that acts as a bridge between QoS flows and D2D bearers. This intermediary layer simplifies the relationship between high-level QoS requirements and low-level transmission paths, making the mapping management more systematic and reducing the complexity burden on end devices.
Data Source
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AI summary
Embodiments of this application provide a data transmission method and a corresponding apparatus. In the method, a same quality of service flow QoS flow carrying data packets sent to a device-to-device D2D terminal or sent by the D2D terminal provides a same service in a wireless communications system, so that data packets that are sent to the D2D terminal and that have a same QoS requirement or data packets that are sent by the D2D terminal and that have a same QoS requirement can be provided with same quality of service, thereby improving wireless communication quality.